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根瘤菌中固氮正调节基因nifA的研究 被引量:4

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摘要 nifA是共生固氮的正调节基因。nifA基因调节固氮基因的表达伴随着一系列信号交换过程,在植物根部形成特定的器官——根瘤,将大气中的N2还原成铵供给植物作为生长的氮源。同时,植物向类菌体提供光合产物和氨基酸作为其生长的碳源。固氮基因在nifA产物NifA激活下表达,固氮过程由此开始。nifA为固氮基因nif/fix的正调节基因。针对nifA基因的位置及其产物NifA的结构和功能作一综述。
出处 《安徽农业科学》 CAS 北大核心 2007年第19期5666-5667,5675,共3页 Journal of Anhui Agricultural Sciences
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