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Genome-Wide Transcriptome Analysis Revealing the Genes Related to Sugar Metabolism in Kernels of Sweet Corn

文献类型： 外文期刊

作者： Chen, Bin 1 ; Feng, Shouli 2 ; Hou, Junfeng 1 ; Zhu, Ying 3 ; Bao, Fei 1 ; Han, Hailiang 1 ; Tan, Heping 1 ; Wang, Guiyue 1 ; Zhao, Fucheng 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Maize & Featured Dryland Crops, Dongyang 322100, Peoples R China

2.Zhejiang Univ, Coll Agr & Biotechnol, Hangzhou 310030, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, Hangzhou 310022, Peoples R China

关键词： sweet corn (Zea mays var; saccharate Sturt); kernel sugar metabolism; genome-wide transcriptome analysis

期刊名称：METABOLITES （ 影响因子：5.581； 五年影响因子：5.531 ）

ISSN：

年卷期： 2022 年 12 卷 12 期

页码：

收录情况： SCI

摘要： Sugar metabolism influences the quality of sweet corn (Zea mays var. saccharate Sturt) kernels, which is a major goal for maize breeding. In this study, the genome-wide transcriptomes from two supersweet corn cultivars (cv. Xuetian 7401 and Zhetian 11) with a nearly two-fold difference in kernel sugar content were carried out to explore the genes related to kernel sugar metabolism. In total, 45,748 differentially expressed genes (DEGs) in kernels and 596 DEGs in leaves were identified. PsbS, photosynthetic system II subunit S, showed two isoforms with different expression levels in leaf tissue between two cultivars, indicating that this gene might influence sugar accumulation in the kernel. On the other hand, hexokinases and beta-glucosidase genes involved in glycolysis, starch and sucrose metabolism were found in developing kernels with a genome-wide transcriptome analysis of developing kernels, which might contribute to the overaccumulation of water-soluble polysaccharides and an increase in the sweetness in the kernels of Xuetian 7401. These results indicated that kernel sugar accumulation in sweet corn might be influenced by both photosynthesis efficiency and the sugar metabolism rate. Our study supplied a new insight for breeding new cultivars with high sugar content and laid the foundation for exploring the regulatory mechanisms of kernel sugar content in corn.

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