Inhibition of miR397 by STTM technology to increase sweetpotato resistance to SPVD

文献类型： 外文期刊

第一作者： Li, Chen

作者： Li, Chen;Abouelnasr, Hesham;Mohamed Hamed, Arisha;Kou, Meng;Tang, Wei;Yan, Hui;Wang, Xin;Zhang, Yun-gang;Liu, Ya-ju;Gao, Run-fei;Ma, Meng;Li, Qiang;Li, Chen;Liu, Xuan-xuan;Tang, Wei;Yan, Hui;Wang, Xiao-xiao;Li, Qiang;Abouelnasr, Hesham;Mohamed Hamed, Arisha

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关键词： sweetpotato; miR397; STTM; SPVD; lignin content

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.384； 五年影响因子：4.021 ）

ISSN： 2095-3119

年卷期： 2022 年 21 卷 10 期

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收录情况： SCI

摘要： As a critical food crop, sweetpotato (Ipomoea batatas (L.) Lam.) is widely planted all over the world, but it is deeply affected by Sweetpotato Virus Disease (SPVD). The present study utilized short tandem target mimic (STTM) technology to effectively up-regulate the expression of laccase (IbLACs) by successfully inhibiting the expression of miR397. The upstream genes in the lignin synthesis pathway were widely up-regulated by feedback regulation, including phenylalanine ammonialyase (PAL), 4-coumarate-CoAligase (4CL), hydroxycinnamoyl CoA:shikimatetransferase (HTC), caffeicacid O-methyltransferase (COMT), and cinnamyl alcohol dehydrogenase (CAD). Meanwhile, the activities of PAL and LAC increased significantly, finally leading to increased lignin content. Lignin deposition in the cell wall increased the physical defence ability of transgenic sweetpotato plants, reduced the accumulation of SPVD transmitted by Bemisia tabaci (Gennadius), and promoted healthy sweetpotato growth. The results provide new insights for disease resistance breeding and green production of sweetpotato.

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