OsNRAMP5，水稻中组成性铁锰摄取的主要参与者。
OsNRAMP5, a major player for constitutive iron and manganese uptake in rice.
机构信息
Department of Global Agricultural Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.
出版信息
Plant Signal Behav. 2012 Jul;7(7):763-6. doi: 10.4161/psb.20510. Epub 2012 Jul 1.
Abstract
Manganese (Mn) and iron (Fe) are essential mineral micronutrients for plants and their deficiency and or toxicity represents a serious agricultural problem. In rice the information about genes involved in Mn uptake from soil is scarce. Recently, we showed that OsNRAMP5 is a plasma membrane protein involved in Mn and Fe transport. The concentration of Mn in roots, shoots and xylem sap of OsNRAMP5 RNAi (OsNRAMP5i) plants was significantly reduced compared with WT plants. The expression of OsNRAMP5 is not controlled by Fe deficiency in root and was also observed in pistil, ovary, lemma and palea. These data show that rice would utilize OsNRAMP5 for constitutive Fe and Mn uptake, while OsNRAMP5 would also play a role in Fe and Mn transport during flowering and seed development.
摘要
锰（Mn）和铁（Fe）是植物必需的矿质微量元素，其缺乏或毒性是一个严重的农业问题。在水稻中，有关从土壤中吸收锰的基因信息很少。最近，我们发现 OsNRAMP5 是一种参与锰和铁运输的质膜蛋白。与 WT 植物相比，OsNRAMP5 RNAi（OsNRAMP5i）植物的根、茎和木质部汁液中的锰浓度显著降低。OsNRAMP5 的表达不受根缺铁的调控，在雌蕊、子房、外稃和内稃中也观察到了这一现象。这些数据表明，水稻将利用 OsNRAMP5 进行组成型铁和锰的吸收，而 OsNRAMP5 也将在开花和种子发育过程中发挥铁和锰运输的作用。
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