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Effects of Heat Stress during seed filling stage on Brassica napus seed Oil Accumulation and Chlorophyll Fluorescence Characteristics

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Phyton-International Journal of Experimental Botany 2023年第2期92卷 333-348页

作者： Ruizhi Huang Huasheng Yu Yong Yang Heqin Liu Xuelong Wu Zhihong Liu Haiyan He Gengwei Wu Wengjia Wang Hua Wang State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products Institute of Virology and BiotechnologyZhejiang Academy of Agricultural SciencesHangzhou310021China Institute of Crop Science and Nuclear Technology Utilization Zhejiang Academy of Agricultural SciencesHangzhou310021China

As global temperature rise,the threat of heat stress to rapeseed production is becoming more *** the response characteristics of two important biological pathways,oil accumulation and photosynthesis,to heat stress during *** seed filling is helpful in the genetic improvement of heat-tolerant *** effects of heat stress on seed oil accumulation and chlorophyll fluorescence characteristics of 29 *** germplasms with different oil content and environmental sensitivity,including 6 rapeseed varieties which exhibited environmentsensitive/insensitive and with high,medium or low oil content,were tested by whole plant heat stress or the in vitro silique culture *** assay exhibited similar trend on oil content of the rapeseed *** heat effect on the chlorophyll fluorescence kinetic parameters F_(v)/F_(m),ETR and Y(Ⅱ)were also *** stress significantly decreased oil content,although there was abundant genetic variation on heat tolerance among the *** analysis showed that the decrease rate of F_(v)/F_(m) of silique heat-stressed *** developing seed was positive correlative to the decrease rate of mature seed oil content of the whole plant heat-stressed rapeseed(R=0.9214,P-valueseed could be used as the index of heat tolerant rapeseed ***,two heat insensitive rapeseed varieties with high oil content were identified.

关键词： Brassica napus L. heat stress seed filling stage oil accumulation chlorophyll fluorescence characteristics

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