Abstract
Background and aims
Lately sweet sorghum (S) has attracted great interest as an alternative feedstock for biofuel production due to its high yielding potential and better adaptation to drought than maize (M). However, little is known about the response of newly developed sweet sorghum genotypes to water deficits, especially at the root level and its water uptake patterns. The objective of this study was to compare the water uptake capacity, growth and developmental characteristics at the root and canopy levels of a sweet sorghum hybrid (Sorghum bicolor cv. Sucro 506) with those of maize (Zea mays cv. PR32F73) at two water regimes.
Methods
The trial was setup in a total of 20 rhizotrons (1 m3), where calibrated soil moisture probes were installed for monitoring and adjusting the soil moisture content to 25% (well-watered, W) and 12% (drought stress, D).
Results
DS was able to sustain its physiological activity close to that of WS plants, while maize was not. The biomass production potential of DS was reduced about 38%, while in maize the reduction was 47%. The water use efficiency (WUE), however, was increased by 20% in sweet sorghum and reduced in 5% in maize. Moreover, in contrast to maize the root length density and water uptake capacity of DS was enhanced. Root water uptake efficiency in DM was sustained close to its potential, but not in sweet sorghum.
Conclusions
In summary, the better adaptation to drought of sweet sorghum is explained by increased WUE, sustained physiological activity and enlarged root system. It is also associated with a reduced water uptake efficiency compared to its control but maintained compared to maize.







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References
Anderson EL (1988) Tillage and N fertilization effects on maize root growth and root:shoot ratio. Plant Soil 108:245–251
Blum A (1989) The temperature response of gas exchange in sorghum leaves and the effect of heterosis. J Exp Bot 40:453–460
Blum A, Arkin GF (1984) Sorghum root growth and water-use as affected by water supply and growth duration. Field Crop Res 9:131–142
Cochard H (2002) Xylem embolism and drought-induced stomatal closure in maize. Planta 215:466–471
Dercas N, Liakatas A (2007) Water and radiation effect on sweet sorghum productivity. Water Resour Manage 21:1585–1600
Fischer KS, Johnson EC, Edmeades GO (1982) Breeding and selection for drought resistance in tropical maize. In: Drought resistance in crops with emphasis on rice. International Rice Research Institute, Manila, Philippines, pp 377–399
Garrity DP, Sullivan CY, Ross WM (1982) Alternative approaches to improving grain sorghum productivity under drought stress. In: Drought resistance in crops with emphasis on rice. International Rice Research Institute Manila, Philippines, pp 339–356
Garrity DP, Sullivan CY, Watts DG (1984) Changes in grain sorghum stomatal and photosynthetic response to moisture stress across growth stages. Crop Sci 24:441–446
Gosse G (1996) Sweet Sorghum. A crop for industry and energy supply. AIR1 CT 92–0041. Commission of the European Communities, DGXII, Brussels, Belgium
Guiying L, Weibin G, Hicks A, Chapman KR (2000) A training manual for sweet sorghum. FAO, Bangkok, Thailand. http://ecoport.org/ep?SearchType=earticleView&earticleId=172&page=−2. Accessed 15 December 2010
Himmelbauer ML, Loiskandl W, Kastanek F (2004) Estimating length, average diameter and surface area of roots using two different Image analyses systems. Plant Soil 260:111–120
Hundal SS, De Datta SK (1984) Water table and tillage effects on root distribution, soil water extraction, and yield of sorghum grown after wetland rice in a tropical soil. Field Crop Res 9:291–303
Javot H, Maurel C (2002) The role of aquaporins in root water uptake. Ann Bot 90:301–313
Jones MM, Rawson HM (1979) Influence of rate of development of leaf water deficits upon photosynthesis, leaf conductance, water use efficiency and osmotic potential in sorghum. Physiol Plant 45:103–111
Jones MM, Osmond CB, Turner NC (1980) Accumulation of solutes in leaves of sorghum and sunflower in response to water deficits. Aust J Plant Physiol 7:193–205
Lingle SE (1987) Sucrose metabolism in the primary culm of sweet sorghum during development. Crop Sci 27:1214–1219
Massacci A, Battistelli A, Loreto F (1996) Effect of drought stress on photosynthetic characteristics, growth and sugar accumulation of field-grown sweet sorghum. Aust J Plant Physiol 23:331–340
Mastrorilli M, Kate N, Rana G, Steduto P (1995) Sweet sorghum in Mediterranean climate: radiation use and biomass water use efficiencies. Indust Crops Prod 3:253–260
Mastrorilli M, Katerji N, Rana G (1999) Productivity and water use efficiency of sweet sorghum as affected by soil water deficit occurring at different vegetative growth stages. Eur J Agron 11:207–215
Miller AN, Ottman MJ (2010) Irrigation frequency effects on growth and ethanol yield in sweet sorghum. Agron J 102:60–70
Passioura JB (1983) Roots and drought resistance. Agr Water Manage 7:265–280
Passioura JB (1996) Drought and drought tolerance. Plant Growth Regul 20:79–83
Pioneer Vademecum 11 (2011). Massima produttività in classe 600 ed ottima precocità. http://www.agronomico.com/Prodotti/Mais/Ibrididimaisconvenzionali/Mediotardivi/PR32F73.aspx
Prasad S, Singh A, Jain N, Joshi HC (2007) Ethanol production from sweet sorghum syrup for utilization as automotive fuel in India. Energ Fuels 21:2415–2420
Rooney WL, Blumenthal J, Bean B, Mullet JE (2007) Designing sorghum as a dedicated bioenergy feedstock. Biofuels Bioprod Bior 1:147–157
Sakellariou-Makrantonaki M, Papalexis D, Nakos N, Kalavrouziotis IK (2007) Effect of modern irrigation methods on growth and energy production of sweet sorghum (var. Keller) on a dry year in Central Greece. Agr Water Manage 90:181–189
Salih AA, Ali IA, Lux A, Luxova M, Cohen Y, Sugimoto Y, Inanaga S (1999) Rooting, water uptake, and xylem structure adaptation to drought of two sorghum cultivars. Crop Sci 39:168–173
Santamaria JM, Ludlow MM, Fukai S (1990) Contribution of osmotic adjustment to grain yield in Sorghum bicolor (L.) moench under water-limited conditions. I Water Stress before Anthesis. Aust J Agric Res 41:51–65
Setter L, Meller VH (1984) reserve carbohydrate in maize stem. [14C] glucose and [14C] sucrose uptake characteristics. Plant Physiol 75:617–622
Sharp RE, Davies WJ (1985) Root growth and water uptake by maize plants in drying soil. J Exp Bot 36:1441–1456
Smith GA, Bagby MO, Lewellan RT, Doney DL, Moore PH, Hills FJ, Campbell LG, Hogaboam GJ, Coe GE, Freeman K (1987) Evaluation of sweet sorghum for fermentable sugar production potential. Crop Sci 27:788–793
Srivastava A, Strasser R (1997) Constructive and destructive actions of light on the photosynthetic apparatus. J Sci Ind Res 56:133–148
Steudle E (2000) Water uptake by root: effects of water deficit. J Exp Bot 51:1531–1542
Stone LR, Goodrum DE, Nor Jaafar M, Khan AH (2001) Rooting front and water depletion depths in grain sorghum and sunflower. Agron J 93:1105–1110
Stričević R, Čaki E (1997) Relationships between available soil water and indicators of plant water status of sweet sorghum to be applied in irrigation scheduling. Irrig Sci 18:17–21
Sullivan CY, Eastin JD (1974) Plant physiological responses to water stress. Agric Meteorol 14:113–127
Turhollow AF, Webb EG, Downing ME (2010) Review of sorghum production practices: Applications for bioenergy. Oak Ridge National Laboratory,Oak Ridge, Tennessee 37831–6283. Managed by UT-BATTELLE, LLC for the U.S. DEPARTMENT OF ENERGY under contract DE-AC05-00OR22725
USDA (2010) USDA Agricultural Projections to 2019. http://www.ers.usda.gov/Briefing/Corn/2010baseline.htm. Accessed 10 January 2011
Wright GC, Smith RCG, McWilliam JR (1983) Differences between two grain sorghum genotypes in adaptation to drought stress. I crop growth and yield responses. Aust J Agric Res 34:615–26
Yuan JS, Tiller KH, Al-Ahmad H, Stewart NR, Stewart CN Jr (2008) Plants to power: bioenergy to fuel the future. Trends Plant Sci 13:421–429
Živčák M, Brestič M, Olšovská K, Slamka P (2008) Performance index as a sensitive indicator of water stress in Triticum aestivum L. Plant Soil Environ 54:133–139
Acknowledgement
The present study was partially funded by the EU Project “Sweet sorghum: an alternative energy crop (SWEETFUEL)” - FP7-KBBE-2008-2B.
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Zegada-Lizarazu, W., Zatta, A. & Monti, A. Water uptake efficiency and above- and belowground biomass development of sweet sorghum and maize under different water regimes. Plant Soil 351, 47–60 (2012). https://doi.org/10.1007/s11104-011-0928-2
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DOI: https://doi.org/10.1007/s11104-011-0928-2


