Maize actin depolymerizing factor 1 ( ZmADF1 ) negatively regulates pollen development

文献类型： 外文期刊

第一作者： Lv, Guihua

作者： Lv, Guihua;Wu, Zhengxin;Li, Xiangnan;Wang, Tingzheng;Chen, Jianjian;Liu, Lei;Zhang, Yuanyuan;Li, Yunfeng;Zhang, Yahui;Ren, Wenchuang

作者机构：

关键词： Actin depolymerizing factor 1; Overexpression; Gene editing; Maize; Pollen development

期刊名称：BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS （ 影响因子：2.5； 五年影响因子：2.7 ）

ISSN： 0006-291X

年卷期： 2024 年 703 卷

页码：

收录情况： SCI

摘要： The normal development of pollen grains and the completion of double fertilization in embryos are crucial for both the sexual reproduction of angiosperms and grain production. Actin depolymerizing factor (ADF) regulates growth, development, and responses to biotic and abiotic stress by binding to actin in plants. In this study, the function of the ZmADF1 gene was validated through bioinformatic analysis, subcellular localization, over- expression in maize and Arabidopsis, , and knockout via CRISPR/Cas9. The amino acid sequence of ZmADF1 exhibited high conservation and a similar tertiary structure to that of ADF homologs. Subcellular localization analysis revealed that ZmADF1 is localized mainly to the nucleus and cytoplasm. The ZmADF1 gene was specifically expressed in maize pollen, and overexpression of the ZmADF1 gene decreased the number of pollen grains in the anthers of transgenic Arabidopsis plants. The germination rate of pollen and the empty seed shell rate in the fruit pods of the overexpressing plants were significantly greater than those in the wild-type (WT) plants. In maize, the pollen viability of the knockout lines was significantly greater than that of both the WT and the overexpressing lines. Our results confirmed that the ZmADF1 gene was specifically expressed in pollen and negatively regulated pollen quantity, vigor, germination rate, and seed setting rate. This study provides insights into ADF gene function and possible pathways for improving high-yield maize breeding.

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