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Genome-Wide Identification, Expression, and Activity Analysis of Alkaline/Neutral Invertase Gene Family from Cassava (Manihot esculenta Crantz)

文献类型: 外文期刊

作者: Yao, Yuan 1 ; Geng, Meng-Ting 1 ; Wu, Xiao-Hui 2 ; Liu, Jiao 1 ; Li, Rui-Mei 1 ; Hu, Xin-Wen 2 ; Guo, Jian-Chun 1 ;

作者机构: 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Minist Agr, Haikou 571101, Peoples R China

2.Hainan Univ, Coll Agr, Haikou 570228, Peoples R China

关键词: Molecular cloning;Alkaline/neutral invertase;Cassava;Differential expression analysis;Sucrose metabolism;Enzyme activities

期刊名称:PLANT MOLECULAR BIOLOGY REPORTER ( 影响因子:1.595; 五年影响因子:2.042 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: Alkaline/neutral invertase comprises a family of enzymes that catalyze the irreversible hydrolysis of sucrose into glucose and fructose. They play a crucial role in carbohydrate partitioning and developmental processes of plants. In this study, we genome-wide identified 11 alkaline/neutral invertase family genes (MeNINVs) from the cassava genome. Based on phylogeny, MeNINVs could be classified into alpha and beta groups. The alpha group genes are encoded by six exons (MeNINV1, 6, 7, 8, and 10) or four exons (MeNINV9), whereas the beta group genes are encoded by four exons (MeNINV2, 3, 4, and nINV1) or five exons (MeNINV5). Their catalytic residues of motifs 2 and 4 for sucrose hydrolysis locate in all MeNINVs. qRT-PCR analysis has demonstrated that all MeNINVs are highly expressed in floral organs. During tuber development, MeNINV1, 6, 10, and nINV1 are strongly expressed in source tissues (leaves), and MeNINV1 and nINV1 also play an important role in sink organs (tuber). Activity analysis of alkaline/neutral invertase and determination of sucrose content in source and sink organs of cassava indicates that lower efficiency of sucrose hydrolysis in source organs (leaves) and higher efficiency in sink organs (tuber) are beneficial sucrose to transport from source to sink organs.

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