数字农科院2.0

ZmbHLH121, a maize bHLH transcription factor inducing leaf senescence by accelerating ROS accumulation in maize (Zea mays L.)

文献类型： 外文期刊

作者： Das Anuj Kumer;Hao Liu;Khan Siffat Ullah;赵军

作者机构：

关键词： Chlorophyll;Leaf senescence;Maize;ROS;ZmbHLH121

期刊名称： Research Journal of Biotechnology

ISSN： 0973-6263

年卷期： 2022 年 17 卷 5 期

页码：

收录情况： 不在遴选数据库范围

摘要： Leaf senescence is the final stage of leaf development which is induced by many genetic and environmental factors. To reveal the role of transcription factors in leaf senescence, we studied the function of a bHLH transcription factor ZmbHLH121 in maize. The overexpression of ZmbHLH121 exhibited phenotypes with leaf senescence. Higher expression pattern of ZmbHLH121 was observed in the immature leaves through expression analysis at early vegetative developmental stages. Results of 3,3-diaminobenzidine (DAB), nitroblue tetrazolium chloride (NBT) histochemical analysis, quantitative measurement of reactive oxygen species (ROS), chlorophyll quantification and transcriptome analysis revealed that, ZmbHLH121 positively regulated leaf senescence by accelerating ROS production and chlorophyll breakdown in maize leaves. It is suggested that, ZmbHLH121 regulated leaf senescence might be due to the excess amount of ROS production and chlorophyll loss in leaves. This study provided useful clue about the mechanism of ZmbHLH121 mediated leaf senescence.

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