Metabolic adaptation of wheat grain contributes to a stable filling rate under heat stress.

ABSTRACT: Wheat (Triticum aestivum) is particularly vulnerable to heat stress during the grain filling stage, and this can adversely affect the final yield. However, the underlying physiological and molecular mechanisms are largely unknown. In this study, the effects of heat stress on grain filling were investigated using wheat varieties with different levels of thermotolerance. Decreased grain weights and filling durations, increased protein contents, and stable filling rates across diverse varieties under different heat regimes suggested a general mechanism for heat adaptation. Proteomic analysis identified 309 heat-responsive proteins (HRPs), and revealed a general decrease in protein synthesis components and metabolic proteins, but a significant increase in stress-response proteins and storage p

SUBMITTER: Wang X 

PROVIDER: S-EPMC6255704 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature