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Involvement of reactive oxygen species in zinc-deficiency induced inhibition of crown root growth in maize plant

文献类型： 外文期刊

作者： Zhang, Jinyao 1 ; Zhang, Yuwei 1 ; Song, Shuhui 1 ; Pan, Yinghong 2 ; Wang, Hong 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

2.Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improve, Beijing 100081, Peoples R China

关键词： Crown root; Proteomic; Reactive oxygen species; Root elongation; Transcriptomic; Zea mays; Zinc deficiency

期刊名称：PLANT AND SOIL （ 影响因子：4.9； 五年影响因子：5.2 ）

ISSN： 0032-079X

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Background and aimsThe levels of reactive oxygen species (ROS) including superoxide anion radical (O2 center dot-), hydrogen peroxide (H2O2) increase in plants under Zinc (Zn) deficiency stress. However, less is known about whether excessive levels of ROS mediate root development and growth under Zn deficient condition.MethodsMaize variety Zhengdan 958 was chosen to grow with nutrient solution culture with the treatments (DAT) of 0 and 1 mu M Zn supply. Exogenous H2O2 and its scavenger (N, N-dimethylthiourea, DMTU), and a catalase inhibitor (Aminotriazole, AT) were added. The distribution of ROS in roots were detected by chemical staining and fluorescent probe technology. The differential expression of related genes and proteins in roots were analyzed through proteomics and transcriptomics approaches.ResultsZn deficiency stress caused high O2 center dot-and H2O2 levels in roots and decreased crown root elongation. Exogenous addition of DMTU reduced the H2O2 content in roots and the inhibitory effect of Zn deficiency on root elongation. Under Zn supply, the addition of H2O2 and AT resulted in short crown roots. The down-regulation of several genes associated with cell wall extension, such as cellulose synthase, xyloglucan endtransglucosylase/hydrolase and beta expansin 8, were found in the transcriptome and proteome data of Zn-deficient root.ConclusionIt is suggested that H2O2 might be involve in the inhibition of crown root development in maize plants subjected to Zn deficiency stress, which may account for the down-regulation of genes related to cell wall extension through transcriptomic and proteomic analysis.

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