Cross talk between Cu excess and Fe deficiency in the roots of rice

•There is a crosstalk between Cu excess and Fe deficiency.•OsMT3a may mediate shoot Fe deficiency caused by Cu excess.•Many Fe uptake related genes are induced to alleviate chlorosis under Cu excess.•The crosstalk between Cu excess and Fe deficiency might be regulated by GA. Copper (Cu) and iron (Fe...

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Bibliographic Details
Published in:Gene 2023-07, Vol.874, p.147491-147491, Article 147491
Main Authors: Gong, Xiao-Ran, Zhang, Shi-Nan, Ye, Li-Na, Luo, Jia-Jun, Zhang, Chang
Format: Article
Language:English
Subjects:
chlorosis
coenzymes
Crosstalk
Cu excess
family
Fe deficiency
genes
gibberellic acid
iron
metallothionein
nutrient deficiencies
Rice
toxicity
Transcriptome
transcriptomics
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Summary:•There is a crosstalk between Cu excess and Fe deficiency.•OsMT3a may mediate shoot Fe deficiency caused by Cu excess.•Many Fe uptake related genes are induced to alleviate chlorosis under Cu excess.•The crosstalk between Cu excess and Fe deficiency might be regulated by GA. Copper (Cu) and iron (Fe) share similar characteristics and participate as coenzymes in several physiological processes. Both Cu excess and Fe deficiency result in chlorosis, however, the crosstalk between the two is not clear in rice. In this study, we performed transcriptome analysis for Cu excess and Fe deficiency in rice. Some WRKY family members (such as WRKY26) and some bHLH family members (such as late flowering) were selected as novel potential transcription factors involved in the regulation of Cu detoxification and Fe utilization, respectively. These genes were induced under corresponding stress conditions. Many Fe uptake-related genes were induced by Cu excess, while Cu detoxification-related genes were not induced by Fe deficiency. Meanwhile, some genes, such as metallothionein 3a, gibberellin 3beta-dioxygenase 2 and WRKY11, were induced by Cu excess but repressed by Fe deficiency. Concisely, our results highlight the crosstalk between Cu excess and Fe deficiency in rice. Cu excess caused Fe deficiency response, while Fe deficiency did not lead to Cu toxicity response. Metallothionein 3a might be responsible for Cu toxicity-induced chlorosis in rice. The crosstalk between Cu excess and Fe deficiency might be regulated by gibberellic acid.
ISSN:0378-1119
1879-0038
DOI:10.1016/j.gene.2023.147491