Abstract
The term ‘quality’ is a complex parameter in the field of potato production, and the desired quality traits depend on the intended use. Important internal quality traits for potatoes are tuber flesh discolouration, dry matter, and starch content. External quality traits include tuber size and shape as well as resistance against mechanical stress during and after harvest. These quality traits are closely interrelated and genetically controlled. It has been demonstrated that all these parameters are also linked to the nutrient status of the plant and/or the tubers. For instance, the susceptibility of tubers for discolouration of both fresh market and processed cultivars is closely related not only to the nutrient supply but also to post-harvest treatment. Besides, the potential to form carcinogenic compounds like acrylamide from precursors during the deep-frying of potato products and the accumulation of toxic substances like glycoalkaloids are important quality criteria in terms of food safety. The influence of the supply of nutrients on potato tuber quality depends initially on their physiological functions, but the ratio to other nutrient needs should also be taken into account.
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Introduction
The potato is a nutritionally valuable staple food. It is used for fresh consumption, processing into French fries and chips (crisps), as well as for the production of dry products and starch extraction. Thus, there are specific quality requirements for each use. The nutritional composition and other quality traits of potato tubers are influenced by the supply and availability of both macro- and micronutrients. However, the impact of the nutrients on potato quality is influenced or overlapped by many other factors, such as cultivar, soil, and climate conditions (Bártová et al. 2013; Lombardo et al. 2013; Brazinskiene et al. 2014). The aim of the present review is to evaluate the current state of knowledge about the functions of macronutrients like potassium (K), magnesium (Mg), nitrogen (N), calcium (Ca), phosphorous (P), and sulfur (S) in plant physiology. The focus is on potato quality but not in relation to interactions with other environmental factors.
Important Potato Quality Traits
In potato production, the term ‘quality’ is a multifaceted trait that depends heavily on the intended use of the final product (Talburt and Smith 1987; Hiltrop 1999; Gerendás and Führs 2013). For potatoes used for fresh consumption, among the external quality parameters, even the cooking type—described as floury or mealy, medium, waxy, or hard-boiling—is important. The cooking type as an internal quality trait is mainly determined and influenced by the starch content. This, in turn, is positively correlated with the specific gravity and the dry matter content of the tubers (Smith 1977; Talburt and Smith 1987; Feltran et al. 2004). When potatoes are produced for starch production, the starch concentration in the tubers is the most important quality parameter. Meanwhile, the dry matter content represents an important quality criterion if they are produced for further processing, such as for French fries or crisps. High dry matter content within the tuber ensures lower oil absorption. This results in a higher yield per unit of oil and improves the texture and shape of the processed product (Kita 2014). In addition to the various internal quality traits described here, the tendency of potatoes to form undesirable discolourations of various origins represents an important quality criterion. The mechanical impact on potato tubers during harvest and post-harvest handling causes, besides external damage and physiological aging during storage, also the internal discolouration of tuber tissue. Enzymatic oxidative processes lead to black spot incidence, especially in the tissue beneath the perimedullary tissue—inside the vascular ring (Baritelle and Hyde 2003). Upon mechanical impact, free phenolic compounds are oxidized by polyphenol oxidases (PPOs) to dopaquinone. These are then transformed into the dark pigment melanin (McGarry et al. 1996).
Figure 1 shows a schematic illustration of these processes. The same reaction occurs during the processing of raw potatoes and is called raw pulp discolouration. Besides enzymatic reactions, the discolouration of potato tuber products can be caused non-enzymatically due to Maillard reaction and as after-cooking darkening. The Maillard reaction takes place during frying and baking of potato products (crisps, French fries, baked potatoes). Basically, it happens in processes that involve reducing sugars (glucose, fructose) and amino acids. This non-enzymatic browning reaction influences flavour, colour, and aroma formation (Belitz et al. 2009). When the reducing sugars specifically react with asparagine, the reaction intermediates may form acrylamide. Acrylamide is known to be neurotoxic and carcinogenic, thus posing a significant potential risk to human health (Rice 2005; Vinci et al. 2012). The after-cooking darkening of potato tubers is an undesirable quality trait, which may occur when the tubers are exposed to air after boiling (Wang-Pruski and Nowak 2004). The darkening is a result of the reaction of chlorogenic acid and ferric ions in the presence of oxygen, leading to a bluish-grey colour (Smith 1977).
The impairment of the internal and external tuber quality is also possible by physiological processes caused or promoted by nutrient deficiency or imbalance (Sowokinos 2007). Internal quality disorders include internal brown spots (IBS), brown centre, and hollow heart. Examples of external quality disorders include tuber malformations, including secondary growth, growth cracks, and thumbnail cracks. IBS occurs mainly in large tubers near both the apical and the basal tuber sections. The initial cause of IBS can be pegged to the on-site shortages in Ca. Combined with other stress conditions (e.g. impaired plant transpiration), the shortage of Ca leads to the loss of cell integrity and subsequent cell death (Palta 2010). This symptom develops mainly in the phloem-rich perimedullary section, whereas necrotic lesions, named here as brown centre, are mainly found in the centre of the tuber (Davies 1998). Brown centre is the result of cell death that may occur during tuber initiation when the temperature is low (Iritani 1981). The combined application of high N rates and intensive irrigation can stimulate fast tuber growth. The enlargement of tubers can lead to the development of hollow hearts from the brown centre (Hiller et al. 1985). Therefore, at specific conditions, both symptoms can be considered different stages of the same defect and are likely to be caused by the same conditions. However, hollow heart may also develop independent of brown centre occurrence in fast growing tubers under changing soil moisture conditions and imbalanced N/Ca supply (Bussan 2007).
External tuber disorders may also be a result of nutrient imbalances. Malformed tubers exhibit different untypical appearances. The causes of interrupted growth are heat and/or moisture stress and/or nutrient stress, e.g. interrupted N supply (Marschner 2012). Growth cracks develop after irregular irrigation of the crop during the tuber enlargement stage. Over-fertilization with N and nutrient imbalances (e.g. boron deficiency) contribute to the occurrence of growth cracks (Hiller et al. 1985; Jefferies and Mackerron 1987). Thumbnail cracks in the tuber periderm appear like thumb nail imprints and are caused by rapid changes in humidity or temperature or from mechanical impact on the tuber during or after harvest (Bohl and Thornton 2006). Ca and Mg contents and their allocation in the tuber can affect the tuber’s resistance to mechanical impacts through cell wall stabilizing properties (Koch et al. 2019b). Glycoalkaloids are potentially health-threatening compounds in potatoes. They occur in the tubers mainly as alpha-solanine and alpha-chaconine. A glycoalkaloid content higher than 100 mg/kg fresh weight (FW) leads to a bitter flavour in potatoes (Friedman 2006). Most importantly, as they are toxic for humans (McMillan and Thompson 1979), the recommended safety level for human consumption has been 200 mg/kg FW for many years (FAO/WHO 2011).
In addition, the accumulation of glycoalkaloids is associated with the greening of tubers (Maga and Fitzpatrick 1980), as both are light-induced processes (Bamberg et al. 2015). But a causal link between the two processes does not exist (Edwards et al. 1998). The greening of tubers occurs due to non-toxic chlorophyll formation, and therefore, greening can be used as a helpful indicator that tubers have been exposed to light and, thus, should not be consumed anymore (Bamberg et al. 2015). Glycoalkaloid formation can also occur in the non-green parts of tubers. That is why it is agreed that glycoalkaloid formation and the greening of potatoes are physiologically unrelated processes (Dao and Friedman 1994; Edwards and Cobb 1999). Figure 2 gives a schematic overview about potato tuber properties as affected by important macronutrients. The fertilization strategy has a substantial impact on important potato quality parameters (Marschner 2012). This is especially true for macronutrients like K, Mg, and N. Various studies over the last 40 years have shown a direct impact of K, Mg, and N on potato quality. But the results of these studies usually show varying responses to nutrient supply, as illustrated for Mg in Table 1. The reasons for inconsistent results among diverse studies might be different cultivation conditions (e.g. pot versus field experiment), duration of the experiments (long-term versus short-term periods), and choice of the kind and number of cultivars.
The following sections aim to provide an overview of the most crucial impacts of K, Mg, N, Ca, S, and P on potato quality traits while considering results that are either contradictory or have not yet been proven.
Potassium
Potassium (K) has an important impact on tuber quality. It acts as an osmotically active ion. Thus, its accumulation in the cytosol drives water uptake into the cell and increases the cell turgor. Also, it contributes substantially to the equilibrium of soluble and insoluble ions (Marschner 2012). The positive effect of K supply on the content of organic acids such as ascorbic acid in the tuber is well known (e.g. Hamouz et al. 2009). The average concentration of K in tubers of about 2.2–2.5% dry weight (DW) is assumed to be optimal for high yield and good quality (Winkelmann 1992). Field trials conducted by K+S KALI GmbH in Germany in 2002 and 2004 have also shown that an increased supply of K raised the ascorbic acid concentration in tubers (Fig. 3). By increasing the cell turgor in the tuber, the risk of internal enzymatic discolouration (black spot; shown in Fig. 1) caused by mechanical impact stresses potentially decreases (Praeger et al. 2009; Fig. 4). As ascorbic acid counteracts the formation of reactive oxygen species, it may be involved in limiting the enzymatic formation of melanin (Delgado et al. 2001). In addition, high ascorbic acid content in potato tubers can be regarded as a positive quality trait. This is because of its antioxidative capacity, which in turn has a positive impact on human health (Delgado et al. 2001). Increasing the K concentration in tubers, generated by K supply, leads to a lowering of reducing sugars (Fig. 5). These are important precursors of acrylamide formation during the Maillard reaction (Matthäus and Haase 2014). The cause of the after-cooking darkening can be countered through high contents of citric acid. Citric acid competes with the phenolic compound chlorogenic acid to bind ferric ions (in fact, citric acid acts as a transporter of Fe in plants) (Wang-Pruski and Nowak 2004). Indeed, in potato, a positive correlation between the K content in tubers and citric acid content was also found in field trials in 2002 and 2004 (Fig. 6).
As K is involved in many physiological processes, including enzyme-activation processes, a deficiency of K can lead to the accumulation of low-molecular-weight compounds, including soluble sugars, organic acids, or amino acids, and decrease the synthesis of high-molecular-weight compounds, such as proteins, starches, or cellulose (Wang et al. 2013). For instance, K is required for the activity of starch synthase. Therefore, a deficit of K can limit the formation of starch (Nitsos and Evans 1969; Subramanian et al. 2011), impair ATP formation and phloem loading of carbohydrates, and also increase the plant respiration (Römheld and Kirkby 2010; Marschner 2012). Hence, the formation of potato tubers can be delayed and restricted, particularly under very severe K deficiency stress. Considering the effect of K supply on glycoalkaloids, Ahmed and Müller (1979) ascertained a decreasing effect of increasing K supply on the glycoalkaloid content of tubers, whereas the contents in leaves and stems remained unaffected. The storability of potatoes is positively influenced by K supply. Pobereżny and Wszelaczyńska (2011) showed that intermediate K doses ranging from 0 to 240 kg K2O ha−1 (optimum 160 kg K2O ha−1) reduced fresh weight losses in two mid-early cultivars during their storage for 6 months.
The form of K application, for example as sulfate or chloride, has a significant impact on tuber quality traits. Figure 7 summarizes the effect of different K fertilizers on yield, starch yield, and starch content. Independent of the K-form supplied (either as K2SO4 or as KCl), the yield is increased with increasing K fertilization. However, fertilization with KCl reduced the starch content of the potatoes by about 2%, finally leading to a starch yield that was about 1 t ha−1 lower than after K application in the sulfate form. What could be the reason for this phenomenon? It is assumed that application of K in chloride form leads, in comparison to the sulfate form, to a lower osmotic potential in crops, as the osmotically active chloride is accumulated in higher amounts than sulfate. This subsequently leads to a higher water uptake and a correspondingly higher vegetative growth. Higher vegetative growth rates, particularly of the above-ground plant parts, lead to an increasing competition for assimilates between shoots and tubers; as the shoot is a strong sink for such assimilates, K is also osmotically active (Marschner 2012). Hence, a very high accumulation of K in tubers leads to an increased uptake of water by the tuber. This can result in a dilution of the starch content independent of the form of K application.
Magnesium
Limited studies are available to review the functions of Mg on tuber quality. Mg might contribute to the stabilization of cell wall associations (Andersson et al. 1994). It can also be assumed that Mg tends to improve the resistance towards mechanical stress that affect tubers though Koch et al. (2019b) could not verify such an effect. Findings regarding the effect of Mg supply on enzymatic discolouration and the accumulation of minor compounds are not consistent, as reviewed by Gerendás and Führs (2013). For example, Klein et al. (1981) found that fertilization with MgSO4 reduced enzymatic discolouration and the concentration of phenolics, whereas Mondy et al. (1967) showed a positive correlation between them. These contradictory results indicate that possible interactions with other production system–related factors may mask the involvement of Mg in this specific quality response. It is commonly known that the enzymatic cascade finally leading to melanin formation and, subsequently, to black spot occurrence is inhibited by a low pH value and antioxidants (Altunkaya and Gökmen 2008). As proof of this concept, increasing citric and/or ascorbic acid in the tubers contributes to the reduction of enzymatic discolourations. The synthesis of ascorbic acid originates from glucose (Marschner 2012). A positive influence of favourable environmental conditions for photosynthesis (e.g. high light intensity) on ascorbic acid concentrations in various crops has been reported (e.g. Noctor and Foyer 1998). The significance of Mg for assimilation and carbohydrate translocation (Koch et al. 2019a) may have a positive effect of increased Mg supply on ascorbic acid formation. However, Mondy and Ponnampalam (1986) did not observe the significant effects of increasing Mg supply on the concentration of ascorbic acid, which agrees with the early reports of Karikka et al. (1944). Gerendás and Führs (2013) concluded from these contrasting results on phenol and ascorbic acid contents with respect to the occurrence of black spots that all these parameters are associated with several environmental factors that were not controlled in the field experiments referred to and therefore, these factors may have masked the effect of Mg.
With respect to non-enzymatic browning, to our knowledge, no results have been published yet on the effect of Mg supply on the content of asparagine or acrylamide formation in tubers and processed food, even though an effect can be expected considering the function of Mg in protein biosynthesis and carbohydrate partitioning (Gerendás and Führs 2013). Recent work showed that when there is a deficit of Mg, the content of reducing sugars in the tuber increases, while the tuber yield decreases but the relationship was non-significant. However, the sugar concentration in the tuber remains unaffected because the supposed increase was to be evaluated as a concentration effect (Koch et al. 2019a). Numerous reports are available on the effect of Mg supply on glycoalkaloid accumulation in potato tubers. Evans and Mondy (1984) as well as Mondy et al. (1987) observed a significant increase in glycoalkaloid concentration in tubers (see Table 1). The authors suggested that this is due to a stimulation of sugar metabolism, and/or an increase in amino acid production. This theory is supported by reports referring to the same field experiments, where it was shown that Mg application increased both the total N and the protein concentration (Klein et al. 1982; Mondy and Ponnampalam 1985). Thereby, the maximal total amino acid concentration correlated with the maximal total glycoalkaloid concentration (Evans and Mondy 1984). However, contradictory results were described by Rogozińska and Wojdya (1999). They found no influence of the Mg supply on the glycoalkaloid concentration of potato tubers.
Regarding the storability of potatoes, also very limited results about the effect of Mg are available. However, in the above-cited study, Pobereżny and Wszelaczyńska (2011) showed that intermediate Mg doses ranging from 0 to 100 kg MgO ha−1 (optimum: 60 kg MgO ha−1) reduced fresh weight losses during 6 months of storage. This is similar to what has been noticed in the case of K.
Nitrogen
Nitrogen (N) is essential for many physiological functions in the cell and consequently for plant growth and yield formation (see part I of the review). However, many quality traits can be affected adversely by N supply (Fig. 2). Plants are able to take up N from different sources, such as ammonium, nitrate, and nitrite. Ammonium is the dominant form in acidic or anaerobic soils, and nitrate is prevalent in well-aerated soils, whereas nitrite availability is generally lower and dependent on nitrification and denitrification in soils (Hachiya and Sakakibara 2016). The nitrate content in potato tubers depends on the cultivar, abiotic factors, the used cultivation system (conventional/organic) (Lachman et al. 2005), and the supply of other nutrients. An increase in the nitrate content as a result of increasing N rates can be reduced by simultaneous addition of increasing Mg rates (Rogozińska et al. 2005). Mg contributes along with micronutrients such as copper and manganese to the activation of nitrate reductases (Rogozińska et al. 2001). Depending on the cultivation conditions, the nitrate content in potato tubers can vary from 34 mg/kg FW (Lachman et al. 2005) to 843 mg/kg FW (Cieslik and Sikora 1998), whereas the content of nitrite is generally lower (0.4–5.73 mg/kg FW). Furthermore, the distribution of nitrate in the tuber is very diverse (Fig. 8). Naumann et al. (2019) showed that the nitrate content in the skin (peel thickness 2–3 mm) is about 6.5 times more than that in the medulla. Qsaki et al. (1995) have found in their studies that nitrate is able to stimulate the branching of stolons and increase stem and shoot growth, which might be one reason for the unequal distribution of nitrate in the tuber. It is obvious that the N nutrition has a substantial impact on the formation of amino acids (Marschner 2012). Potato tubers contain considerable amounts of free amino acids (Farré et al. 2001). Thus, the amino acid pattern is typically characterized by high amide contents which are mainly asparagine and glutamine. About 14–31% of the total amino acids in tubers were shown to be asparagine (Elmore et al. 2015). An accumulation of asparagine, in particular, as a response to high N supply has been observed. This is typically referred to as the favourable low C/N ratio of this storage and transport form of N in plants (Muttucumaru et al. 2013). As mentioned, the formation of acrylamide is specifically formed by the reaction of reducing sugars with asparagine (Matthäus and Haase 2014). In contrast to the effect of increased N supply on asparagine accumulation, a lower N supply can lead to an increase in reducing sugars of 60 up to 100% in tuber dry matter (De Wilde et al. 2006). Therefore, the formation of acrylamide also depends heavily on the N nutrition (De Wilde et al. 2006). This is particularly true when there is a K deficiency. This is because not only the production of amides is increased as a result of high N supply, but also the transformation of amides into proteins is reduced by a K deficiency. Therefore, in principle, the higher the N/K supply ratio, the higher is the risk of acrylamide formation. Decreasing the ratio by decreasing the N supply and increasing the K supply instead reduces the risk of acrylamide formation (Gerendás et al. 2007).
Calcium
Calcium (Ca) is involved in various functions in the plant cell that are related to the quality of potatoes, such as maintaining structural cell integrity and regulating metabolic responses (Palta 1996; Seling et al. 2000). It is needed for cell wall and membrane stabilization (Hirschi 2004; Palta 2010). In cell walls, Ca contributes to their characteristic structure by bridging galacturonates of pectin via carboxylate groups (Subramanian et al. 2011). On the other hand, membrane stabilization is caused by bridging the phosphate and carboxylate groups of phospholipids and proteins at membrane surfaces (Legge et al. 1982; Kirkby and Pilbeam 1984). Based on these functions for cell wall and membrane stability, it can be expected that Ca is essential for establishing and maintaining potato skin firmness (Koch et al. 2019b). Additionally, it also gives tubers higher resistance against pathogens as for example has been shown by McGuire and Kelman (1984). They found a reduced severity of bacterial soft rot caused by Erwinia carotovora pv. atroseptica with increased Ca concentrations in tubers. However, potato tubers are very low in Ca which can be attributed to the fact that Ca is mainly transported via the xylem (Palta 1996). Ca deficiency can lead to several physiological plant disorders, such as internal brown spots (ITS) and hollow heart (Palta 2010) which can also lead to a decline in the internal potato tuber quality (Clough 1994). Collier et al. (1978) demonstrated that an additional supply of Ca could increase tuber Ca concentrations and reduce the occurrence of ITS. This has also been shown by Ozgen et al. (2006) who proved that there was an inverse relationship between tuber Ca and the occurrence of ITS. Kratzke and Palta (Kratzke and Palta 1985, 1986) and Palta (2010) demonstrated that Ca concentrations in tubers could be increased if Ca is directly applied to the tuber-stolon area.
Phosphorous and Sulfur
The macronutrients phosphorous (P) and sulfur (S) also contribute to the yield of quality potatoes through their physiological functions in the plant. Up to 75% of the potato tuber dry matter is composed of carbohydrates, the main representative of which is starch (McGill et al. 2013). The quality of starch in potatoes is dependent on different physical and chemical characteristics which are mainly determined by the amylose content, granule size, and glucose-6-phosphate content (Christensen and Madsen 1996; Haase and Plate 1996). The bound P in starch, mainly present as glucose-6-phosphate, is responsible for its unique technological properties in view of gelatinization temperatures and cross-linking ability (Christensen and Madsen 1996). An increased availability of P in soil leads to an increase in P concentration in the tuber. This in turn leads to higher amylose content and changed thermal and pasting starch properties (Leonel et al. 2016). A recent study confirmed that increased P availability in soils resulted in tubers with higher dry matter content, lower total sugar content, and higher contents of both starch and proteins (Leonel et al. 2017). Therefore, P is extremely important in the optimal development of quality potato tubers.
Beside N, S also has a decisive impact on amino acid formation and hence protein synthesis. Thus, under S deprivation, the proportion of S-containing essential amino acids, namely cysteine and methionine, can be reduced while the proportions of other amino acids can be increased (Eppendorfer and Eggum 1994; Marschner 2012). As described above, acrylamide is formed by reducing sugars reacting with asparagine. Prosser et al. (2001) in their study have compared different crops exposed to S deficiency. They observed that there was an increase in the transport of amino acids glutamine and asparagine. In potato, Elmore et al. (2007) could show a cultivar-dependent increase of acrylamide precursors under S deprivation but no increase of acrylamide itself. They argued that the acrylamide formation depends on separate amounts of amino acid and sugar precursors and that in their study, precursor amino acids were more than precursor sugars which may also react with acrylamide non-precursor amino acids. In addition, an increasing supply of S can improve the absorption of K and P (Klikocka et al. 2015) and thus indirectly support the quality-promoting effects of these macroelements in the tuber.
Conclusion
An adequate and balanced supply of nutrients to potatoes is important for achieving not only a high yield but also the desired quality. The discussed roles of the represented plant nutrients on potato quality traits are diverse and complex. On the one hand, clear relations could be demonstrated between the nutrient supply and physiological processes which are important for potato tuber quality, such as the impact of K on photosynthesis. On the other hand, quality traits, such as the presence of ascorbic acid, which are built up by precursors originating from photosynthesis, did not show clear results with respect to the impact of K supply on ascorbic acid content in potato tubers. This might be related to the fact that the influence of the respective nutrient on a certain quality trait is overlapped by other factors such as climate or specific site conditions. Besides appropriate nutrients and their ratios, even the choice of fertilizer can be of particular relevance. Along with the principles of adequate potato nutrition, other agronomic measures like choice of cultivar and plant protection need to be considered as well.
References
Addiscott TM (1974) Potassium and the distribution of calcium and magnesium in potato plants. J Sci Food Agric 25:1173–1183. https://doi.org/10.1002/jsfa.2740250915
Ahmed SS, Müller K (1979) Seasonal changes and the effect of nitrogen- and potash-fertilization on the solanine and α-chaconine content in various parts of the potato plant. J Plant Nutr Soil Sci 142:275–279. https://doi.org/10.1002/jpln.19791420214
Altunkaya A, Gökmen V (2008) Effect of various inhibitors on enzymatic browning, antioxidant activity and total phenol content of fresh lettuce (Lactuca sativa). Food Chem 107:1173–1179. https://doi.org/10.1016/j.foodchem.2007.09.046
Andersson A, Gekas V, Lind I, Oliveira F, Öste R, Aguilfra JM (1994) Effect of preheating on potato texture. Crit Rev Food Sci Nutr 34:229–251. https://doi.org/10.1080/10408399409527662
Bamberg J, Moehninsi NR, Suriano J (2015) Variation for tuber greening in the diploid wild potato Solanum microdontum. Am J Potato Res 92:435–443. https://doi.org/10.1007/s12230-015-9454-8
Baritelle AL, Hyde GM (2003) Specific gravity and cultivar effects on potato tuber impact sensitivity. Postharvest Biol Technol 29:279–286. https://doi.org/10.1016/S0925-5214(03)00003-6
Bártová V, Diviš J, Bárta J, Brabcová A, Švajnerová M (2013) Variation of nitrogenous components in potato (Solanum tuberosum L.) tubers produced under organic and conventional crop management. Eur J Agron 49:20–31. https://doi.org/10.1016/j.eja.2013.02.009
Belitz H, Grosch W, Schieberle P (2009) Food chemistry. Springer, Berlin
Bohl WH, Thornton MK (2006) Thumbnail cracks of potato tubers. University of Idaho. http://www.extension.uidaho.edu/publishing/pdf/CIS/CIS1129.pdf. Accessed 6 June 2019
Brazinskiene V, Asakaviciute R, Miezeliene A, Alencikiene G, Ivanauskas L, Jakstas V, Viskelis P, Razukas A (2014) Effect of farming systems on the yield, quality parameters and sensory properties of conventionally and organically grown potato (Solanum tuberosum L.) tubers. Food Chem 145:903–909. https://doi.org/10.1016/j.foodchem.2013.09.011
Bussan AJ (2007) The canon of potato science: 45. Brown centre and hollow heart. Potato Res 50:395–398. https://doi.org/10.1007/s11540-008-9087-0
Christensen DH, Madsen MH (1996) Changes in potato starch quality during growth. Potato Res 39:43–50. https://doi.org/10.1007/bf02358205
Cieslik E, Sikora E (1998) Correlation between the levels of nitrates and nitrites and the contents of potassium, calcium and magnesium in potato tubers. Food Chem 63:525–528. https://doi.org/10.1016/S0308-8146(98)00027-2
Clough GH (1994) Potato tuber yield, mineral concentration, and quality after calcium fertilization. J Am Soc Hortic Sci 119:175–179. https://doi.org/10.21273/JASHS.119.2.175
Collier GF, Wurr DCE, Huntington VC (1978) The effect of calcium nutrition on the incidence of internal rust spot in the potato. J Agric Sci 91:241–243. https://doi.org/10.1017/S0021859600056823
Dao L, Friedman M (1994) Chlorophyll, chlorogenic acid, glycoalkaloid, and protease inhibitor content of fresh and green potatoes. J Agric Food Chem 42:633–639. https://doi.org/10.1021/jf00039a006
Davies HV (1998) Physiological mechanisms associated with the development of internal necrotic disorders of potato. Am J Potato Res 75:37–44. https://doi.org/10.1007/bf02883515
De Wilde T, De Meulenaer B, Mestdagh F, Govaert Y, Vandeburie S, Ooghe W, Fraselle S, Demeulemeester K, Van Peteghem C, Calus A, Degroodt J-M, Verhé R (2006) Influence of fertilization on acrylamide formation during frying of potatoes harvested in 2003. J Agric Food Chem 54:404–408. https://doi.org/10.1021/jf0521810
Delgado E, Sulaiman MI, Pawelzik E (2001) Importance of chlorogenic acid on the oxidative potential of potato tubers of two German cultivars. Potato Res 44:207–218. https://doi.org/10.1007/bf02410107
Edwards EJ, Cobb AH (1999) The effect of prior storage on the potential of potato tubers (Solanum tuberosum L) to accumulate glycoalkaloids and chlorophylls during light exposure, including artificial neural network modelling. J Sci Food Agric 79:1289–1297. https://doi.org/10.1002/(SICI)1097-0010(19990715)79:10<1289::AID-JSFA363>3.0.CO;2-F
Edwards EJ, Saint RE, Cobb AH (1998) Is there a link between greening and light-enhanced glycoalkaloid accumulation in potato (Solanum tuberosum L) tubers? J Sci Food Agric 76:327–333. https://doi.org/10.1002/(SICI)1097-0010(199803)76:3<327::AID-JSFA934>3.0.CO;2-G
Elmore JS, Mottram DS, Muttucumaru N, Dodson AT, Parry MAJ, Halford NG (2007) Changes in free amino acids and sugars in potatoes due to sulfate fertilization and the effect on acrylamide formation. J Agric Food Chem 55:5363–5366. https://doi.org/10.1021/jf070447s
Elmore JS, Briddon A, Dodson AT, Muttucumaru N, Halford NG, Mottram DS (2015) Acrylamide in potato crisps prepared from 20 UK-grown varieties: effects of variety and tuber storage time. Food Chem 182:1–8. https://doi.org/10.1016/j.foodchem.2015.02.103
Eppendorfer WH, Eggum BO (1994) Effects of sulphur, nitrogen, phosphorus, potassium, and water stress on dietary fibre fractions, starch, amino acids and on the biological value of potato protein. Plant Foods Hum Nutr 45:299–313. https://doi.org/10.1007/bf01088079
Ernst H, Wulkow A, Pawelzik E (2008) Qualitätsmangel schwarzfleckigkeit: einfluss antioxidativer substanzen auf die schwarzfleckigkeitsneigung von kartoffeln. Kartoffelbau 59:408–412
Evans D, Mondy NI (1984) Effect of magnesium fertilization on glycoalkaloid formation in potato tubers. J Agric Food Chem 32:465–466. https://doi.org/10.1021/jf00123a010
FAO/WHO (2011) Evaluation of certain contaminants in food: seventy-second report of the Joint FAO/WHO expert committe on food additives. https://apps.who.int/iris/bitstream/handle/10665/44514/WHO_TRS_959_eng.pdf. Accessed 6 June 2019
Farré EM, Tiessen A, Roessner U, Geigenberger P, Trethewey RN, Willmitzer L (2001) Analysis of the compartmentation of glycolytic intermediates, nucleotides, sugars, organic acids, amino acids, and sugar alcohols in potato tubers using a nonaqueous fractionation method. Plant Physiol 127:685–700. https://doi.org/10.1104/pp.010280
Feltran JC, Lemos LB, Vieites RL (2004) Technological quality and utilization of potato tubers. Sci Agric 61:593–597. https://doi.org/10.1590/S0103-90162004000600006
Friedman M (2006) Potato glycoalkaloids and metabolites: roles in the plant and in the diet. J Agric Food Chem 54:8655–8681. https://doi.org/10.1021/jf061471t
Gerendás J, Führs H (2013) The significance of magnesium for crop quality. Plant Soil 368:101–128. https://doi.org/10.1007/s11104-012-1555-2
Gerendás J, Heuser F, Sattelmacher B (2007) Influence of nitrogen and potassium supply on contents of acrylamide precursors in potato tubers and on acrylamide accumulation in French fries. J Plant Nutr 30:1499–1516. https://doi.org/10.1080/01904160701555846
Haase NU, Plate J (1996) Properties of potato starch in relation to varieties and environmental factors. Starch 48:167–171. https://doi.org/10.1002/star.19960480503
Hachiya T, Sakakibara H (2016) Interactions between nitrate and ammonium in their uptake, allocation, assimilation, and signaling in plants. J Exp Bot 68:2501–2512. https://doi.org/10.1093/jxb/erw449
Hamouz K, Lachman J, Dvořák P, Orsák M, Hejtmánková K, Čížek M (2009) Effect of selected factors on the content of ascorbic acid in potatoes with different tuber flesh colour. Plant Soil Environ 55:281–287. https://doi.org/10.17221/82/2009-PSE
Hiller LK, Koller DC, Thornton RE (1985) Physiological disorders of potato tubers. In: Li PH (ed) Potato physiology. pp 389–455
Hiltrop P (1999) Rohstoffqualitäten für pommes frites und andere vorgebackene kartoffelprodukte. In: Schuhmann P (ed) Die erzeugung von kartoffeln zur industriellen verarbeitung. Agrimedia GmbH, Bergen (Germany), pp 1–208
Hirschi KD (2004) The calcium conundrum. Both versatile nutrient and specific signal. Plant Physiol 136:2438–2442. https://doi.org/10.1104/pp.104.046490
Iritani WM (1981) Growth and preharvest stress and processing quality of potatoes. Am Potato J 58:71–80. https://doi.org/10.1007/bf02855381
Jefferies RA, Mackerron DKL (1987) Observations on the incidence of tuber growth cracking in relation to weather patterns. Potato Res 30:613–623. https://doi.org/10.1007/bf02367642
Karikka KJ, Dudgeon LT, Hauck HM (1944) Influence of variety, location, fertilizer, and storage on the ascorbic acid content of potatoes grown in New York State. J Agric Res 68:49–63. https://doi.org/10.1007/BF02850864
Kirkby EA, Pilbeam DJ (1984) Calcium as a plant nutrient. Plant Cell Environ 7:397–405. https://doi.org/10.1111/j.1365-3040.1984.tb01429.x
Kita A (2014) The effect of frying on fat uptake and texture of fried potato products*. Eur J Lipid Sci Technol 116:735–740. https://doi.org/10.1002/ejlt.201300276
Klein LB, Chandra S, Mondy NI (1981) Effect of magnesium fertilization on the quality of potatoes. Yield, discoloration, phenols, and lipids. J Agric Food Chem 29:384–387. https://doi.org/10.1021/jf00104a040
Klein LB, Chandra S, Mondy NI (1982) Effect of magnesium fertilization on the quality of potatoes: total nitrogen, nonprotein nitrogen, protein, amino acids, minerals and firmness. J Agric Food Chem 30:754–757. https://doi.org/10.1021/jf00112a032
Klikocka H, Kobialka A, Juszczak D, Glowacka A (2015) The influence of sulphur on phosphorus and potassium content in potato tubers (Solanum tuberosum L.). J Elem 20:621–629. https://doi.org/10.5601/jelem.2014.19.2.661
Koch M, Busse M, Naumann M, Jákli B, Smit I, Cakmak I, Hermans C, Pawelzik E (2019a) Differential effects of varied potassium and magnesium nutrition on production and partitioning of photoassimilates in potato plants. Physiol Plant. https://doi.org/10.1111/ppl.12846
Koch M, Naumann M, Pawelzik E (2019b) Cracking and fracture properties of potato (Solanum tuberosum L.) tubers and their relation to dry matter, starch, and mineral distribution. J Sci Food Agric 99:3149–3156. https://doi.org/10.1002/jsfa.9530
Kratzke MG, Palta JP (1985) Evidence for the existence of functional roots on potato tubers and stolons: significance in water transport to the tuber. Am Potato J 62:227–236. https://doi.org/10.1007/bf02852802
Kratzke MG, Palta JP (1986) Calcium accumulation in potato tubers: role of the basal roots. HortScience 21:1022–1024
Lachman J, Hamouz K, Orsák M (2005) The effect of selected factors on the content of protein and nitrates in potato tubers. Plant Soil Environ 51:431–438. https://doi.org/10.17221/3614-PSE
Legge RL, Thompson JE, Baker JE, Lieberman M (1982) The effect of calcium on the fluidity and phase properties of microsomal membranes isolated from postclimacteric golden delicious apples. Plant Cell Physiol 23:161–169. https://doi.org/10.1093/oxfordjournals.pcp.a076335
Leonel M, Carmo EL, Fernandes AM, Franco CM, Soratto RP (2016) Physico-chemical properties of starches isolated from potato cultivars grown in soils with different phosphorus availability. J Sci Food Agric 96:1900–1905. https://doi.org/10.1002/jsfa.7295
Leonel M, do Carmo EL, Fernandes AM, Soratto RP, Ebúrneo JAM, Garcia ÉL, dos Santos TPR (2017) Chemical composition of potato tubers: the effect of cultivars and growth conditions. J Food Sci Technol 54:2372–2378. https://doi.org/10.1007/s13197-017-2677-6
Lombardo S, Lo Monaco A, Pandino G, Parisi B, Mauromicale G (2013) The phenology, yield and tuber composition of ‘early’ crop potatoes: a comparison between organic and conventional cultivation systems. Renew Agric Food Syst 28:50–58. https://doi.org/10.1017/S1742170511000640
Maga JA, Fitzpatrick TJ (1980) Potato glycoalkaloids. Crit Rev Food Sci Nutr 12:371–405. https://doi.org/10.1080/10408398009527281
Marschner P (2012) Marschner’s mineral nutrition of higher plants. Elsevier, Amsterdam
Matthäus B, Haase NU (2014) Acrylamide – still a matter of concern for fried potato food?*. Eur J Lipid Sci Technol 116:675–687. https://doi.org/10.1002/ejlt.201300281
McGarry A, Hole CC, Drew RLK, Parsons N (1996) Internal damage in potato tubers: a critical review. Postharvest Biol Technol 8:239–258. https://doi.org/10.1016/0925-5214(96)00006-3
McGill CR, Kurilich AC, Davignon J (2013) The role of potatoes and potato components in cardiometabolic health: a review. Ann Med 45:467–473. https://doi.org/10.3109/07853890.2013.813633
McGuire RG, Kelman A (1984) Reduced severity of Erwinia soft rot in potato tubers with increased calcium content. Phytopathology 74:1250–1256. https://doi.org/10.1094/Phyto-74-1250
McMillan M, Thompson J (1979) An outbreak of suspected solanine poisoning in schoolboys: examination of criteria of solanine poisoning. QJM 48:227–243. https://doi.org/10.1093/oxfordjournals.qjmed.a067573
Miča B (1979) Einfluß von abgestuften N-, P-, K-gaben und zusatzgaben von Ca und Mg auf den stärke-und zuckergehalt von kartoffeln. Starch 31:275–278. https://doi.org/10.1002/star.19790310809
Miča B, Vokal B (1983) Einfluss von magnesium und calcium auf ertrag und bedeutende inhaltsstoffe von kartoffelknollen. Potato Res 26:383–391. https://doi.org/10.1007/bf02356159
Mondy NI, Ponnampalam R (1985) Effect of magnesium fertilizers on total glycoalkaloids and nitrate-n in Katahdin tubers. J Food Sci 50:535–536. https://doi.org/10.1111/j.1365-2621.1985.tb13446.x
Mondy NI, Ponnampalam R (1986) Potato quality as affected by source of magnesium fertilizer: nitrogen, minerals, and ascorbic acid. J Food Sci 51:352–354. https://doi.org/10.1111/j.1365-2621.1986.tb11127.x
Mondy NI, Mobley EO, Gedde-Dahl SB (1967) Influence of potassium fertilization on enzymatic activity, phenolic content and discoloration of potatoes. J Food Sci 32:378–381. https://doi.org/10.1111/j.1365-2621.1967.tb09689.x
Mondy NI, Gosselin B, Ponnampalam R (1987) Effect of soil applications of magnesium sulfate and dolomite on the quality of potato tubers. Am Potato J 64:27–34. https://doi.org/10.1007/bf02853228
Muttucumaru N, Powers SJ, Elmore JS, Mottram DS, Halford NG (2013) Effects of nitrogen and sulfur fertilization on free amino acids, sugars, and acrylamide-forming potential in potato. J Agric Food Chem 61:6734–6742. https://doi.org/10.1021/jf401570x
Naumann M, Jansen G, Pawelzik E (2019) Nitrat in kartoffeln und kartoffelprodukten. Kartoffelbau 70:17–19
Nitsos RE, Evans HJ (1969) Effects of univalent cations on the activity of particulate starch synthetase. Plant Physiol 44:1260–1266. https://doi.org/10.1104/pp.44.9.1260
Noctor G, Foyer CH (1998) Ascorbate and glutathione: keeping active oxygen under control. Annu Rev Plant Biol 49:249–279. https://doi.org/10.1146/annurev.arplant.49.1.249
Ozgen S, Karlsson BH, Palta JP (2006) Response of potatoes (cv Russet Burbank) to supplemental calcium applications under field conditions: tuber calcium, yield, and incidence of internal brown spot. Am J Potato Res 83:195–204. https://doi.org/10.1007/bf02872155
Palta JP (1996) Role of calcium in plant responses to stresses: linking basic research to the solution of practical problems. HortScience 31:51–57. https://doi.org/10.21273/hortsci.31.1.51
Palta JP (2010) Improving potato tuber quality and production by targeted calcium nutrition: the discovery of tuber roots leading to a new concept in potato nutrition. Potato Res 53:267–275. https://doi.org/10.1007/s11540-010-9163-0
Pobereżny J, Wszelaczyńska E (2011) Effect of bioelements (N, K, Mg) and long-term storage of potato tubers on quantitative and qualitative losses. Part II. Content of dry matter and starch. J Elem 16. https://doi.org/10.5601/jelem.2011.16.2.07
Praeger U, Herppich WB, König C, Herold B, Geyer M (2009) Changes of water status, elastic properties and blackspot incidence during storage of potato tubers. J Appl Bot Food Qual 83:1–8
Prosser IM, Purves JV, Saker LR, Clarkson DT (2001) Rapid disruption of nitrogen metabolism and nitrate transport in spinach plants deprived of sulphate. J Exp Bot 52:113–121. https://doi.org/10.1093/jxb/52.354.113
Qsaki M, Shirai J, Shinano T, Tadano T (1995) Effects of ammonium and nitrate assimilation on the growth and tuber swelling of potato plants. Soil Sci Plant Nutr 41:709–719. https://doi.org/10.1080/00380768.1995.10417021
Rice JM (2005) The carcinogenicity of acrylamide. Mutat Res Genet Toxicol Environ Mutagen 580:3–20. https://doi.org/10.1016/j.mrgentox.2004.09.008
Rogozińska I, Wojdya T (1999) Der einfluß variierter düngung, einer pflanzenschutzmittel-anwendung und der lagerung auf den glykoalkaloid-gehalt in kartoffelknollen zweier sorten. Potato Res 42:79–88. https://doi.org/10.1007/bf02358393
Rogozińska I, Wojdyła T, Pobereżny J (2001) Contamination of edible potato tubers with compounds decreasing their health status as a result of mineral fertilization. Pol J Environ Stud 10:38–41
Rogozińska I, Pawelzik E, Poberezny J, Delgado E (2005) The effect of different factors on the content of nitrate in some potato varieties. Potato Res 48:167–180. https://doi.org/10.1007/bf02742374
Römheld V, Kirkby EA (2010) Research on potassium in agriculture: needs and prospects. Plant Soil 335:155–180. https://doi.org/10.1007/s11104-010-0520-1
Seling S, Wissemeier AH, Cambier P, Van Cutsem P (2000) Calcium deficiency in potato (Solanum tuberosum ssp. tuberosum) leaves and its effects on the pectic composition of the apoplastic fluid. Physiol Plant 109:44–50. https://doi.org/10.1034/j.1399-3054.2000.100107.x
Smith O (1977) Potatoes: production, storing, processing. Avi Publishing Company, Westport (USA)
Sowokinos JR (2007) Chapter 23 - internal physiological disorders and nutritional and compositional factors that affect market quality. In: Vreugdenhil D, Bradshaw J, Gebhardt C, Govers F, Mackerron DKL, Taylor MA, Ross HA (eds) Potato biology and biotechnology. Elsevier, Amsterdam, pp 501–523. https://doi.org/10.1016/B978-044451018-1/50065-8
Subramanian NK, White PJ, Broadley MR, Ramsay G (2011) The three-dimensional distribution of minerals in potato tubers. Ann Bot 107:681–691. https://doi.org/10.1093/aob/mcr009
Talburt WF, Smith O (1987) Potato processing. Van Nostrand Reinhold, New York City
Vinci RM, Mestdagh F, De Meulenaer B (2012) Acrylamide formation in fried potato products – present and future, a critical review on mitigation strategies. Food Chem 133:1138–1154. https://doi.org/10.1016/j.foodchem.2011.08.001
Wang M, Zheng Q, Shen Q, Guo S (2013) The critical role of potassium in plant stress response. Int J Mol Sci 14:7370–7390. https://doi.org/10.3390/ijms14047370
Wang-Pruski G, Nowak J (2004) Potato after-cooking darkening. Am J Potato Res 81:7–16. https://doi.org/10.1007/bf02853831
Winkelmann H (1992) Potassium fertiliser application to potatoes. Kartoffelbau 43:412–418
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Naumann, M., Koch, M., Thiel, H. et al. The Importance of Nutrient Management for Potato Production Part II: Plant Nutrition and Tuber Quality. Potato Res. 63, 121–137 (2020). https://doi.org/10.1007/s11540-019-09430-3
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DOI: https://doi.org/10.1007/s11540-019-09430-3