Brassinosteroids promote seed development and physiological maturity of oilseed rape (Brassica napus L.)

作     者：Lin Wan Fengqi Zhang Liyan Zhang Lixin Liu Chang Chen Ni Ma Chunlei Zhang 

作者机构：Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture Key Laboratory of Crop Cultivation and Physiology Ministry of Agriculture Oil Crops Research Institute Chinese Academy of Agricultural SciencesWuhan China Chemistry and Material Science College Nanjing Normal University Nanjing China 

出 版 物：《Oil Crop Science》 (中国油料作物学报(英文版）)

年 卷 期：2017年第2卷第2期

页      面：122-130页

学科分类：09[农学] 0901[农学-作物学] 

基　　金：We would like to express our gratitude to National Natural Science Foundation of China(31271671, 31571619) Special Fund for Agro-scientific Research in the Public Interest of China from the Min-istry of Agriculture (No. 201503122) for financial sup-port 

主　　题：winter oilseed rape (B. napus L.) brassinosteroids early maturity seed production seed quality 

摘      要：Long developmental stage and late harvest time of winter rapeseed (Brassica napus L.) have great negative effects on rice planting of rice-rapeseed farming system in China. Early maturity improvement of rapeseed is necessary. ‘Zhongshuang 11’, an elite winter rapeseed cultivar, was used in consecutive field experiments during 2010-2012. At initial flowering stage, plants were consecutively sprayed with 0.1 mg/L 2-4-Epibrassinolide(BR) for 3 d. Two hundred sampling pods from different plants were randomly collected to measure seed related indexes with a 4 d interval from 7 to 47 d after peak anthesis (DAPA).Seed color turned light brown at 31 or 35 DAPA after BR treatment, seed dry weight (DWT)was increased while seed moisture content (SMC) was decreased during seed development.DWT almost reached the maximum value when SMC was 33.20% at 31 DAPA in 2010-2011 and 35.29% at 35 DAPA in 2011-2012 growing season after BR treatment. Similarly,the maximum values of standard germination test (SGT), accelerated aging test (AAT)and cold test (CT) were observed at 31 or 35 DAPA after BR treatment respectively. The high yield and seed oil content appeared at 31 or 35 DAPA accompanied with rapid decrease in total non-structural carbohydrate (TNC) in stems and leaves. Our study indicated that BR application advanced maturity of winter rapeseed by 4 to 8 days.