Effects of Heat Stress during Seed Filling Stage on Brassica napus Seed Oil Accumulation and Chlorophyll Fluorescence Characteristics
作者机构：State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-ProductsInstitute of Virology and BiotechnologyZhejiang Academy of Agricultural SciencesHangzhou310021China Institute of Crop Science and Nuclear Technology UtilizationZhejiang Academy of Agricultural SciencesHangzhou310021China
出 版 物：《Phyton-International Journal of Experimental Botany》 (国际实验植物学杂志（英文）)
年 卷 期：2023年第92卷第2期
页 面：333-348页
核心收录：
学科分类：1008[医学-中药学(可授医学、理学学位)] 10[医学]
基 金：funded by the Natural Science Foundation of Zhejiang Province(LY20C130006) the National Natural Science Foundation of China(32172018) the State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products(2010DS700124-ZZ1805)
主 题：Brassica napus L. heat stress seed filling stage oil accumulation chlorophyll fluorescence characteristics
摘 要：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-value0.01).Overall,the results indicated that heat stress inhibited oil accumulation and photosynthesis in *** developing *** decrease rate of chlorophyll fluorescence parameter F_(v)/F_(m) of heat-stressed developing seed could be used as the index of heat tolerant rapeseed ***,two heat insensitive rapeseed varieties with high oil content were identified.
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