Abstract
High temperature stress is an environmental factor limiting sorghum (Sorghum bicolor (L.) Moench) productivity. We determined the optimum heat‐shock protein (HSP) induction temperature in sorghum leaves and investigated intraspecific genetic variability in HSP synthesis among inbred lines RTx430, SC599‐6, and SC326‐6. One dimensional electrophoresis indicated an optimum 42 °C synthesis temperature in seedling leaves. Analysis of genetic variation by two‐dimensional electrophoresis showed only three genotype‐specific but many common HSPs. Sixteen of the common HSPs were synthesized in control samples; however, synthesis during high temperatures was dramatically enhanced. The results suggest limited variation in HSP synthesis and predominant constitutive HSP synthesis among these sorghum lines.
Published Version
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