Regulatory mechanisms of iron homeostasis in maize mediated by ZmFIT

文献类型： 外文期刊

第一作者： Li, Suzhen

作者： Li, Suzhen;Ma, Shuai;Song, Zizhao;Li, Yu;Liu, Xiaoqing;Yang, Wenzhu;Zhou, Xiaojin;Chen, Rumei;Ma, Shuai;Wang, Tianyu;Li, Yu

作者机构：

关键词： Iron homeostasis; Transcription activation complex; Zea mays; ZmFIT

期刊名称：CROP JOURNAL （ 影响因子：5.6； 五年影响因子：6.0 ）

ISSN： 2095-5421

年卷期： 2024 年 12 卷 5 期

页码：

收录情况： SCI

摘要： Regulation of iron homeostasis in maize remains unclear, despite the known roles of FER-Like Fe deficiency-induced transcription factor (FIT) in Arabidopsis and rice. ZmFIT, like AtFIT and OsFIT, interacts with iron-related transcription factors 2 (ZmIRO2). Here, we investigate the involvement of ZmFIT in iron homeostasis. Mutant ZmFIT lines exhibiting symptoms of Fe deficiency had reduced shoot iron content. Transcriptome analysis revealed downregulation of Fe deficiency-responsive genes in the roots of a Zmfit mutant. ZmFIT facilitates the nuclear translocation of ZmIRO2 to activate transcription of down-stream genes under Fe-deficient conditions. Our findings suggest that ZmFIT, by interaction withZmIRO2, mediates iron homeostasis in maize. Notably, the binding and activation mechanisms of ZmFIT resemble those in Arabidopsis but differ from those in rice, whereas downstream genes regulated by ZmFIT show similarities to rice but differences from Arabidopsis. In brief, ZmFIT, orthgologs of OsFIT and AtFIT in rice and maize, respectively, regulates iron uptake and homeostasis in maize, but with variations. (c) 2024 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license.

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