Quality of winter wheat in relation to heat and drought shock after anthesis
2011
Balla, K.,Agricultural Research Inst. of the Hungarian Academy of Sciences, Martonvasar (Hungary) | Rakszegi, M.,Agricultural Research Inst. of the Hungarian Academy of Sciences, Martonvasar (Hungary) | Li, Z.,CSIRO Food Future Flagship, North Ryde (Australia) | Bekes, F.,CSIRO Food Future Flagship, North Ryde (Australia) | Bencze, S.,Agricultural Research Inst. of the Hungarian Academy of Sciences, Martonvasar (Hungary) | Veisz, O.,Agricultural Research Inst. of the Hungarian Academy of Sciences, Martonvasar (Hungary)
This study investigated the effect of high temperature and drought (during grain-filling) on the quality and components yield of five winter wheat varieties. Drought and drought + heat were found to have a much greater influence on the yield and quality than heat stress alone. Averaged over the varieties, the yield losses were 57% after drought, 76% after drought + heat, and only 31% after heat stresses. The reductions in the unextractable polymeric protein fraction and glutenin-to-gliadin ratio indicated a poorer grain yield quality, despite the higher protein content. Quality deterioration was observed after drought or drought + heat, while high temperatures alone resulted in no change or in a better ratio of protein components. A significant negative correlation was observed between starch granule size and relative protein content after drought.
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