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Physiological and transcriptional responses in the iron-sulphur cluster assembly pathway under abiotic stress in peach (Prunus persica L.) seedlings

文献类型： 外文期刊

作者： Song, Zhizhong 1 ; Yang, Yong 1 ; Xu, Jianlan 1 ; Ma, Ruijuan 1 ; Yu, Mingliang 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Hort, Nanjing 210014, Peoples R China

关键词： Peach;Fe–S cluster assembly;genes;Iron homeostasis;Abiotic stress

期刊名称：PLANT CELL TISSUE AND ORGAN CULTURE （ 影响因子：2.711； 五年影响因子：2.73 ）

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收录情况： SCI

摘要： As one of the most indispensable element in mineral nutrition of plants, iron (Fe) is closely related to fruits quality and yield. However, molecular mechanisms towards Fe metabolism in fruit trees is largely unclear. In higher plants, iron-sulphur (Fe-S) cluster assembly occurs in chloroplasts, mitochondria and cytosol involving dozens of genes. In this study, we identified 44 putative Fe-S cluster assembly genes in peach (Prunus persica cv. 'Xiahui6'), and analyzed Fe-S cluster assembly gene expression profiles in response to abiotic stresses. Peach seedlings were more sensitive to iron deficiency, drought and salinity stress, evidenced in reduced photosynthetic performance and altered activity of nitrite reductase, succinate dehydrogenase and aconitase. In addition, Fe-S cluster assembly genes are differentially regulated by abiotic stresses. Iron depletion and drought stress are likely to affect Fe-S cluster assembly genes in leaves. Excess iron toxicity mainly induces Fe-S cluster assembly gene expression in roots, whereas salinity stress massively inhibits Fe-S cluster assembly gene expression in roots. Interestingly, we found that un-functional scaffolds are more prone to disappear during the long-term evolution in perennial woody plants. Our findings directly provide molecular basis for Fe metabolism in peach, and favorably reveal potential candidate genes for further functional determination

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