Physiological and Molecular Responses Under Fe Deficiency in Two Rice (Oryza sativa) Genotypes Differing in Iron Accumulation Ability in Seeds

文献类型： 外文期刊

第一作者： Chen, Lin

作者： Chen, Lin;Ding, Chengqiang;Wang, Shaohua;Ding, Yanfeng;Zhao, Xiufeng

作者机构：

关键词： Rice (Oryza sativa);Fe deficiency;Gene expression;Shoot;Root;Response

期刊名称：JOURNAL OF PLANT GROWTH REGULATION （ 影响因子：4.169； 五年影响因子：4.038 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Fe is an essential mineral element that plants need for their growth. When there is low soil availability of Fe, plants show severe deficiency symptoms. Under Fe-deficiency conditions, plants alter a number of processes to acquire Fe from soil. Genes involved in these mechanisms have been identified from different model plants, including Arabidopsis and rice. Fe transport within plants is also tightly regulated. In this study, we used H9405, a cultivar of rice with high Fe accumulation in seeds, and Yangdao 6, a cultivar with low seed Fe accumulation, to study their responses under different Fe conditions. Our results showed that genes involved in acquisition of Fe from soil in these two cultivars were both up-regulated in roots under Fe-deficiency conditions, and the elevation of the expression was much higher in Yangdao 6 than in H9405. However, remobilization-related genes in shoot vasculature were expressed in an opposite way between the two cultivars. In H9405, the expression of these genes was up-regulated; but in Yangdao 6, their expression was reduced. Our results showed that the differential expression of root-uptake and shoot-remobilization genes in the two cultivars is correlated to the Fe content in roots, shoots, and seeds. Strategies to biofortify rice cultivars with different characteristics were also discussed based on our discovery.

分类号： Q94

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