Reduction in seed set upon exposure to high night temperature during flowering in maize

• DOI: 10.1111/ppl.13049
• Publication Date: 2019-11-20T14:54:35Z
• Authors: Yuanyuan Wang; Hongbin Tao; Ping Zhang; Xinfang Hou; Dechang Sheng; Beijing Tian; Pu Wang; Shoubing Huang
• Keywords: Anthesis; Sink (geography)

High temperature reduces crop production; however, little is known about the effects of high night (HNT) on development male and female reproductive organs, pollination, kernel formation grain yield in maize (Zea mays L.). Therefore, a temperature-controlled experiment was carried out using heat-sensitive hybrid including three treatments 32/22°C (day/night; control), 32/26°C 32/30°C during 14 consecutive days encompassing flowering stage. When exposed to 30°C temperature, number reduced by 23.8 25.1%, respectively, compared with control. The decrease mainly because lower rather than change weight under HNT exposure around flowering. No significant differences were found between 22 26°C temperatures. had no onset time anthesis-silking interval but significantly period pollen shedding duration viability, increased leaf respiration. Different from daytime lasting photosynthesis, biomass production assimilate transportation. From perspective source-flow-sink relationship, unchanged source flow capacities are supposed alleviate adverse sink strength caused heat stress. These new findings commendably filled knowledge gaps concerning stress maize.