Transcriptional mechanism of differential sugar accumulation in pulp of two contrasting mango (Mangifera indica L.) cultivars
文献类型： 外文期刊
作者： Li, Li 1 ; Wu, Hong-Xia 1 ; Ma, Xiao-Wei 1 ; Xu, Wen-Tian 1 ; Liang, Qing-Zhi 1 ; Zhan, Ru-Lin 2 ; Wang, Song-Biao 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, South Subtrop Crops Res Inst, Minist Agr, Key Lab Trop Fruit Biol, Zhanjiang 524091, Peoples R China
2.Chinese Acad Trop Agr Sci, Haikou Expt Stn, Inst Trop Fruit Tree, Haikou 571101, Hainan, Peoples R China
关键词： RNA-seq; Sugar metabolism; Mango; D-glucose; Alpha-glucosidase; Invertase; Alpha-amylase
期刊名称：GENOMICS （ 影响因子：5.736； 五年影响因子：4.939 ）
ISSN： 0888-7543
年卷期： 2020 年 112 卷 6 期
页码：
收录情况： SCI
摘要： Temporal transcriptome analysis combined with targeted metabolomics was employed to investigate the mechanisms of high sugar accumulation in fruit pulp of two contrasting mango cultivars. Ten sugar metabolites were identified in mango pulp with the most dominant being D-glucose. Analysis of the gene expression patterns revealed that the high-sugar cultivar prioritized the conversion of sucrose to D-glucose by up-regulating invertases and A-glucosidases and increased other genes directly contributing to the synthesis of sucrose and D-glucose. In contrast, it repressed the expression of genes converting sucrose, D-glucose and other sugars into intermediates compounds for downstream processes. It also strongly increased the expression of alpha-amylases which may promote high degradation of starch into D-glucose. Besides, 3/4 of the sugar transporters was strongly up-regulated, indicative of their preponderant role in sugar accumulation in mango fruit. Overall, this study provides a good insight into the regulation pattern of high sugar accumulation in mango pulp.
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