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Gene structure, phylogeny and expression profile of the sucrose synthase gene family in cacao (Theobroma cacao L.)

文献类型： 外文期刊

作者： Li, Fupeng 1 ; Hao, Chaoyun 1 ; Yan, Lin 1 ; Wu, Baoduo 1 ; Qin, Xiaowei 1 ; Lai, Jianxiong 1 ; Song, Yinghui 2 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Key Lab Genet Resources Utilizat Spice & Beverage, Minist Agr, Spice & Beverage Res Inst, Wanning 571533, Peoples R China

2.Chinese Acad Trop Agr Sci, Key Lab Genet Resources Utilizat Spice & Beverage, Minist Agr, Spice & Beverage Res Inst, Wanning

关键词： sucrose synthase;gene structure;phylogenetic;expression profile;Theobroma cacao

期刊名称：JOURNAL OF GENETICS （ 影响因子：1.166； 五年影响因子：1.212 ）

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收录情况： SCI

摘要： In higher plants, sucrose synthase (Sus, EC 2.4.1.13) is widely considered as a key enzyme involved in sucrose metabolism. Although, several paralogous genes encoding different isozymes of Sus have been identified and characterized in multiple plant genomes, to date detailed information about the Sus genes is lacking for cacao. This study reports the identification of six novel Sus genes from economically important cacao tree. Analyses of the gene structure and phylogeny of the Sus genes demonstrated evolutionary conservation in the Sus family across cacao and other plant species. The expression of cacao Sus genes was investigated via real-time PCR in various tissues, different developmental phases of leaf, flower bud and pod. The Sus genes exhibited distinct but partially redundant expression profiles in cacao, with TcSus1, TcSus5 and TcSus6, being the predominant genes in the bark with phloem, TcSus2 predominantly expressing in the seed during the stereotype stage. TcSus3 and TcSus4 were significantly detected more in the pod husk and seed coat along the pod development, and showed development dependent expression profiles in the cacao pod. These results provide new insights into the evolution, and basic information that will assist in elucidating the functions of cacao Sus gene family.

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