K+ is the most abundant cation in plant cell,consisting of more than 2%of dry weight.Due to its flowability in plants,K+ is a major osmotic element,playing an essential role in the process of plant growth and development as well as stress-resisting.In order for plants to grow well,a variety of K+ transporters are needed to maintain their K+ homeostasis by cooperate with each other to mediate K+uptake and transport as the result of the fact that concentration of K+ in soil is only 1%of that in plant and diff...