Abstract
The influence of fertilization on senescence and nutrient remobilization in potato leaves was investigated in two farming systems on a soil with a poor potassium availability. The ‘Conventional’ farming system followed good local practices including industrial products, while in the ‘Bio-Dynamic’ farming system industrial fertilizers and synthetic pesticides were avoided. Potassium concentrations in the dry matter of mature leaves varied over a wide range. Nitrogen compounds (protein, chlorophyll) were less affected, and phosphorus concentrations in the dry matter were similar. Magnesium and potassium concentrations in the leaves were negatively correlated. In both farming systems senescence was advanced in plants with a low nutrient supply. Alkaline pyrophosphatase and aminopeptidase activities (in general highest in expanding and mature leaves) were lower and endopeptidase activities peaked earlier on plots with low fertilizer levels. A high percentage of potassium was remobilized from senescing leaves on unfertilized plots, but the phosphorus concentration remained high at the end of the season. The results suggest that the differential net remobilization of nitrogen, phosphorus and potassium depended on actual source/sink relations in the plants.
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Alföldi Th, Mäder P, Schachenmann O, Niggli U and Besson J-M 1992 DOK-Versuch: vergleichende Langzeituntersuchungen in den drei Anbausystemen biologisch-Dynamisch, Organisch-biologisch und Konventionell. III. Boden: Nmin-Untersuchungen, 1. und 2. Frucht-folgeperiode. Schweiz. Landw. 32, 59–82.
Besson J-M and Niggli U 1991 DOK-Versuch: vergleichende Langzeit-Untersuchungen in den drei Anbausystemen biologisch-Dynamisch, Organisch-biologisch und Konventionell. I. Konzeption des DOK-Versuchs: 1. und 2. Fruchtfolgeperiode. Schwei. Landw. 31, 79–109.
Besson J-M, Meyre S and Niggli U 1991 DOK-Versuch: vergleichende Langzeit-Untersuchungen in den drei Anbausystemen biologisch-Dynamisch, Organisch-biologisch und Konventionell. II. Ertrag der Kulturen: Kartoffeln, 1. und 2. Fruchtfolgeperiode. Schweiz. Landw. 31, 127–155.
Besson J-M, Michel V and Niggli U 1992 DOK-Versuch: vergleichende Langzeituntersuchungen in den drei Anbausystemen biologisch-Dynamisch, Organisch-biologisch und Konventionell. II. Ertrag der Kulturen: Kunstwiesen, 1. und 2. Fruchtfolgeperiode. Schweiz. Landw. 32, 85–107.
Bradford M M 1976 A rapid and sensitive method for the quantification of microgram quantities of protein using the principle of protein dye binding. Anal. Biochem. 72, 248–254.
Crafts-Brandner S J 1992 Phosphorus nutrition influence on leaf senescence in soybean. Plant Physiol. 98, 1128–1132.
Cramer F 1958 Papierchromatographie, Verlag Chemie, Weinheim, 102 p.
Dalling M J (Ed.) 1986 Plant Proteolytic Enzymes, Volume 1. CRC-Press, Boca Raton, 157 p.
Feller U K, Soong T-S T and Hageman R H 1977 Leaf proteolytic activities and senescence during grain development of field-grown corn (Zea mays L.). Plant Physiol. 59, 290–294.
Feller U 1983 Senescence and proteolytic activities in detached leaves and detached shoots of wheat. Physiol. Vég. 21, 93–102.
Feller U 1990 Nitrogen remobilization and protein degradation during senescence. In Nitrogen in Higher Plants. Ed. Y P Abrol. pp 195–222. Research Studies Ltd., Somerset, England.
Fröhlich V and Feller U 1991 Effect of phloem interruption on senscence and protein remobilization in the flag leaf of field-grown wheat. Biochem. Physiol. Pflanzen 187, 139–147.
Fröhlich V and Feller U 1992 Effect of phloem interruption on endopeptidase and aminopeptidase activities in flag leaves of field-grown wheat. Biochem. Physiol. Pflanzen 188, 13–21.
Hanway J J and Weber C R 1971 N, P and K percentages in soybean (Glycine max [L.] Merill) plant parts. Agron. J. 63, 286–290.
Marschner H 1986 Mineral Nutrition of Higher Plants. Academic Press, London, 674 p.
Noodén L and Leopold A C (Eds.) 1988 Senescence and Aging in Plants. Academic Press, San Diego, 526 p.
Ryan C A 1973 Proteolytic enzymes and their inhibitors. Annu. Rev. Plant Physiol. 24, 173–196.
Ryan C A and Walker-Simmons M 1981 Plant proteinases. In The Biochemistry of Plants, Volume 6, Proteins and Nucleic Acids. Ed. A Marcus. pp 321–350. Academic Press, New York.
Salgo A and Feller U 1986 Effects of the germination time on enzyme stabilities in extracts from wheat endosperms. Bot. Helv. 96, 273–282.
Santarius K and Belitz H-D 1978 Proteinase activity in potato plants. Planta 141, 145–153.
Schenk D and Feller U 1990 Effect of phloem interruption on leaf senescence and nutrient redistribution in wheat (Triticum aestivum). In Plant Nutrition-Physiology and Applications. Ed. M L van Beusichem. pp 121–125. Kluwer Academic Publishers, Dordrecht.
Strain H H, Cope B T and Svec W A 1971 Analytical procedures for isolation, identification, estimation and investigation of the chloropylls. In Methods in Enzymology, Vol. 23. Eds. S P Colowick and N O Kaplan. pp 452–476. Academic Press, New York.
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Berchtold, A., Besson, JM. & Feller, U. Effects of fertilization levels in two farming systems on senescence and nutrient contents in potato leaves. Plant Soil 154, 81–88 (1993). https://doi.org/10.1007/BF00011075
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DOI: https://doi.org/10.1007/BF00011075