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Exogenous gibberellin affects reserve accumulation during seeds filling in Brassica Napus

Exogenous gibberellin affects reserve accumulation during se...

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从植物科学到农业发展——2012全国植物生物学大会

作者： Xingqun Huang~1,Xiaoying Zhao~1,Reqing He~1,Bo Zhou~1,Wusheng Peng~3,Yuhong Zhuo~3, Jianzhong Lin~1,Dongying Tang~1,Jihong Zhang~1,Xuanming Liu~(*1,2) 1 Bioenergy and Biomaterial Research Center,College of Biology,Hunan University,Changsha 410082. 2 State Key Laboratory of Chemo/Biosensing and Chemometrics,Hunan University,Changsha 410082. 3 Academy of Seed Industry of Hunan Yahua,Changsha 410001.

Exogenous Gibberellins(GAs) are applied in agriculture broadly and their physiological functions and biochemistry mechanism become more and more clear,but little is known about the effect of GAs on the reserve substance accumulation during seed *** this paper,it is shown that GAs acts as a physiological regulator in the regulation of carbohydrate,protein,and lipids accumulation in developing seeds of Brassica *** was found that the oil and total sugar content of seeds increased by 4.70%and 6.77%,and the crude protein content decreased by 3.18%in the samples treated with GA at 15 DAF (days after flower);the total sugar content increased by 4.10%,and the crude protein content decreased by 5.77%treated with GA3 at 25 DAF;the crude protein and total sugar content increased by 5.85%and 5.04%treated with GA3 at 35DAF.Q-PCR analysis results showed the transcription levels of three transcription factors(LEC1,LEC2 and WRI), sucrose transporter SUC2,and key oil-synthesis gene DGAT were upregulated in response to GA at 15DAF,and the transcription factor ABB,ABI5,and storage protein gene Napin were downregulated in GA-treated samples at 25DAF,while upregulated at 35DAF,which consistent with the reserve accumulation *** results indicated that the effect of GAs on the reserve accumulation may be due to the altered lipid,protein,sugar metabolism related gene expression.

关键词： Gibberellins reserve accumulation gene expression Seed Maturing Brassica napuss

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