The B-Type Cyclin CYCB1-1 Regulates Embryonic Development and Seed Size in Maize

文献类型： 外文期刊

第一作者： Zhao, Bingbing

作者： Zhao, Bingbing;He, Haohua;Zhao, Bingbing;Zhou, Miaoyi;Ren, Wen;Li, Hanshuai;Zhang, Qian;Liu, Ya;Zhang, Qian;He, Guangming;He, Guangming

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关键词： cell cycle; B-type cyclin; embryo development; seed size; maize

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）

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年卷期： 2022 年 23 卷 11 期

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收录情况： SCI

摘要： Progress through the cell cycle is a critical process during plant embryo and seed development and its progression is regulated by cyclins. Despite extensive study of cyclins in other systems, their role in embryo and seed development of maize is unclear. In this study, we demonstrate that ZmCYCB1-1 overexpression significantly accelerated embryo growth and increased seed size. In situ hybridization and toluidine blue staining indicated that ZmCYCB1-1 was highly expressed in the plumule of embryos, and the cells of the plumule were smaller, denser, and more regularly arranged in ZmCYCB1-1 overexpression plants. Overexpression of ZmCYCB1-1 in maize also resulted in an increased ear length and enhanced kernel weight by increasing kernel width. Transcriptome analysis indicated that the overexpression of ZmCYCB1-1 affected several different metabolic pathways, including photosynthesis in embryos and leaves, and lipid metabolism in leaves. Conversely, knocking out ZmCYCB1-1 resulted in plants with slow growth. Our results suggest that ZmCYCB1-1 regulates embryo growth and seed size, making it an ideal target for efforts aimed at maize yield improvement.

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