Iron Uptake and Loading into Rice Grains
Iron Uptake and Loading into Rice Grains
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DOI：
10.1007/s12284-010-9042-y
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发表时间：
2010-09-01
期刊：
影响因子：
5.5
通讯作者：
Nishizawa, Naoko K.
中科院分区：
文献类型：
--
作者：
Bashir, Khurram;Ishimaru, Yasuhiro;Nishizawa, Naoko K.
铁（Fe）是生物体重要的微量营养素。缺铁严重损害植物生长，是一个普遍的人类饮食问题，特别是受影响的儿童和女性人数很高。水稻（Oryza sativa）是世界上一半以上人口的能源来源。因此，研究水稻对铁的吸收和转运机制，对于培育耐低铁和高铁含量的水稻品种具有重要意义。近年来，铁的运输和体内平衡机制的揭示，为提高水稻籽粒铁含量提供了机会。由于过量的铁对细胞有毒，植物已经发展出复杂的机制来控制铁的流动，使得很难改变铁的运输。因此，选择合适的螯合剂和适当的启动子驱动的铁转运蛋白似乎是关键，在开发水稻是耐受低铁可用性和积累高籽粒水平的铁。最近的许多研究都是为了提高水稻的铁含量。在这里，我们总结了这些努力，并回顾了最近的进展，了解铁的运输机制。
Iron (Fe) is an important micronutrient for living organisms. Fe deficiency severely impairs plant growth and is a widespread human dietary problem, with particularly high numbers of affected children and females. Rice (Oryza sativa) is a source of energy for more than half of the world's population. Thus, understanding the mechanisms of Fe uptake and translocation in rice is of utmost importance in the development of rice varieties that are tolerant to low Fe availability and with high seed levels of Fe. In recent years, the mechanisms underlying Fe transport and homeostasis have been revealed, providing opportunities to increase the Fe content of rice grain. As excess Fe is toxic to cells, plants have developed sophisticated mechanisms to control Fe flow, making it difficult to alter Fe transport. Thus, choosing appropriate chelators and Fe transporters driven by appropriate promoters seems to be the key in developing rice that is tolerant to low Fe availability and which accumulates high grain levels of Fe. Many recent studies have been aimed at increasing the Fe content of rice. Here, we summarize these efforts and review recent progress in understanding the mechanisms of Fe transport.