高等植物氮素吸收分子机理研究进展

N是植物生长必需的营养元素之一,对其吸收机理的进一步研究可以为合理施用N肥以及通过分子生物学途径改良品种、提高N肥利用效率提供理论依据。随着近年来多学科的交叉发展,人们开始将分子生物学技术应用于植物营养的研究中,对N素吸收的分子机理的研究就是其中一项重要的内容。NH4 和NO3-是高等植物吸收的两种主要形态的N素,本文对近年来国内外关于NH4 吸收基因AMT以及NO3-吸收基因NRT的鉴定、克隆及表达规律的研究进行了概述。

Advance in Research on Molecular Mechanism for Nitrogen Absorption in Higher Plants

Nitrogen is a vital element for plant growth and development. The study on mechanism of nitrogen absorption by plants can help optimize nitrogen fertilization and may also serve as a theoretic foundation for breeding new cultivars with higher nitrogen use efficiency. Nowadays,with the recent development of interdisciplines scientists have begun to study mechanism of N assimilation using the technology of molecular biology. NH4 and NO3- are two major N sources for plants. In this article,researches on identification,cloning and expression patterns of AMT and NRT genes responsible for NH4 and NO3- assimilation,respectively,are briefly reviewed.