The development of a phosphite-mediated fertilization and weed control system for rice.
The development of a phosphite-mediated fertilization and weed control system for rice.
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DOI：
10.1038/srep24941
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发表时间：
2016-04-25
影响因子：
4.6
通讯作者：
Reddy MK
中科院分区：
文献类型：
--
作者：
Manna M;Achary VM;Islam T;Agrawal PK;Reddy MK
化肥和除草剂是现代农业的两个重要组成部分。磷酸盐储备耗尽和多种除草剂耐受性迫在眉睫的危险使人们对未来农业的可持续性产生了怀疑。亚磷酸盐是磷的还原形式，已被提议作为替代肥料和除草剂，在很大程度上解决上述问题。为了评估基于亚磷酸盐的施肥和杂草控制系统对水稻的适用性，我们用来自施氏假单胞菌的密码子优化的 ptxD 基因改造了水稻植株。该基因的异位表达除了在亚磷酸盐存在下转基因植物的正常产量外，还改善了根系生长、生理学和整体表型。亚磷酸盐起到易位、非选择性、芽前和芽后除草剂的作用。亚磷酸盐用作双重肥料和除草剂可以减轻磷肥的过度使用，减少富营养化和除草剂抗性的发展，从而提高农业的可持续性。
Fertilizers and herbicides are two vital components of modern agriculture. The imminent danger of phosphate reserve depletion and multiple herbicide tolerance casts doubt on agricultural sustainability in the future. Phosphite, a reduced form of phosphorus, has been proposed as an alternative fertilizer and herbicide that would address the above problems to a considerable extent. To assess the suitability of a phosphite-based fertilization and weed control system for rice, we engineered rice plants with a codon-optimized ptxD gene from Pseudomonas stutzeri. Ectopic expression of this gene led to improved root growth, physiology and overall phenotype in addition to normal yield in transgenic plants in the presence of phosphite. Phosphite functioned as a translocative, non-selective, pre- and post-emergent herbicide. Phosphite use as a dual fertilizer and herbicide may mitigate the overuse of phosphorus fertilizers and reduce eutrophication and the development of herbicide resistance, which in turn will improve the sustainability of agriculture.