高等植物K^+吸收机制研究进展  

A Review on the Potassium Uptake Mechanism in Higher Plants

作　　者：李万良[1] 李时群[1] 张英[1] 

机构地区：[1]吉林省农业科学院,长春130033

出　　处：《玉米科学》2010年第2期149-152,共4页Journal of Maize Sciences

摘　　要：从高亲和性和低亲和性K+吸收两个方面较详细介绍了K+营养的吸收机制。高亲和性K+吸收机制包括H+-K+交换ATPase、K+-ATPase、H+-K+symporter和Na+-K+symporter;低亲和性K+吸收机制也被称为"协助扩散",研究表明是通过K+通道进行的,但K+通道的确切结构尚无定论。综述了植物K+吸收的调节,并对相关问题进行了展望。The paper summed up the advances of potassium uptake mechanism in biochemical molecular fields involved in potassium channel,high-affinity potassium transporter and H+-ATPase.The potassium transport in plants correlates respectively to the three types of proteins coded by different potassium transporter family.The reviewfocuses on describing the characteristic of the cloned K+ transporters and their possible roles in mediating high and low-affinity K+ uptake from the soil as well as howK+ acquisition regula...

关 键 词：钾离子通道 高亲和力转运体 H+-ATP酶 钾吸收 

分 类 号：Q945[生物学—植物学]