Heat Stress After Pollination Reduces Kernel Number in Maize by Insufficient Assimilates.

ABSTRACT: Global warming has increased the occurrence of high temperature stress in plants, including maize, resulting in decreased the grain number and yield. Previous studies indicate that heat stress mainly damages the pollen grains and thus lowered maize grain number. Other field studies have shown that heat stress after pollination results in kernel abortion. However, the mechanism by which high temperature affect grain abortion following pollination remains unclear. Hence, this study investigated the field grown heat-resistant maize variety "Zhengdan 958" (ZD958) and heat-sensitive variety "Xianyu 335" (XY335) under a seven-day heat stress treatment (HT) after pollination. Under HT, the grain numbers of XY335 and ZD958 were reduced by 10.9% (p = 0.006) and 5.3% (p = 0.129), respe

SUBMITTER: Niu S 

PROVIDER: S-EPMC8532994 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature