Effects of Exogenous Application of GA(4+7)and NAA on Sugar Accumulation and Related Gene Expression in Peach Fruits During Developing and Ripening Stages
文献类型： 外文期刊
作者： Li, Xiongwei 1 ; Liu, Pan 1 ; Zhou, Jingyi 2 ; Su, Mingshen 1 ; Ma, Yaping 1 ; Jia, Huijuan 3 ; Du, Jihong 1 ; Gao, Zhong 1 ;
作者机构： 1.Shanghai Acad Agr Sci, Forest & Fruit Tree Res Inst, Shanghai 201403, Peoples R China
2.Shanghai Municipal Agr Technol Extens & Serv Ctr, Dept Hort, Shanghai 201103, Peoples R China
3.Zhejiang Univ, Key Lab Hort Plant Growth Dev & Qual Improvement, State Agr Minist, Dept Hort, Hangzhou 310058, Peoples R China
关键词： Peach; Sugar accumulation; Gibberellic acid; 1-naphthaleneacetic acid
期刊名称：JOURNAL OF PLANT GROWTH REGULATION （ 影响因子：4.169； 五年影响因子：4.038 ）
ISSN： 0721-7595
年卷期：
页码：
收录情况： SCI
摘要： Sweetness is one of the key factors determining peach fruit quality. To better understand the molecular basis of gibberellic acid (GA) and 1-naphthaleneacetic acid (NAA) interference with sugar biosynthesis, a middle-late maturing commercial cultivar, 'Jinxiu' yellow peach fruit, was treated with three different concentrations of GA(4+7)and four of NAA. Fruit weight, firmness, total soluble solids, different sugar contents and the expression level of sugar-related genes were evaluated. The results showed that maximum increase in cv. 'Jinxiu' peach fruit size and sucrose content was with 1.25 mM GA(4+7), compared to control fruits and the other treatments during the ripening stages. The sucrose-phosphate synthase gene (PpSPS(2)) which had a high level of expression and positive correlation with sucrose content was significantly regulated by 1.25 mM GA(4+7)in the final ripening stages. 0.5 mM NAA treatments significantly reduced the sucrose content and fruit size. Ninety percent of the fruits were deformed or dropped from the trees with treatments of 1 mM NAA and 2 mM NAA in the early development period. The crosstalk of different phytohormones and the related genes will be further investigated to get an insight into the inherent association between hormone control and sugar accumulation.
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