Advances in understanding molecular mechanisms of K+ uptake and transport in higher plants

doi:10.11686/cyxb2019123

Abstract

Abstract: As one of the major nutrients, potassium (K⁺) is essential for plant growth and development. Large amounts of K⁺ need to be taken up from the soil and transported throughout the plant. The K⁺ transporters and the K⁺ channels mainly mediate K⁺ transport across the plasma membrane and the tonoplast membrane in plants. The HAK/KUP/KT family and the HKT family are two main groups of proteins which have been widely associated with K⁺ uptake and transport, and they fulfill diverse roles in plant growth processes, salt tolerance and osmotic potential regulation. K⁺-permeable members of HKT family seem to be present in monocots only. The Shaker family, comprising voltage-gated channels, dominate the plasma membrane conductance of K⁺ in most environmental conditions. This review summarizes recent research and progress in understanding of the structure, localization, expression, function and regulation of three main K⁺ transport families. We also propose research hotspots and directions for future K⁺ research.

Key words: K⁺ uptake and transport, KT/HAK/KUP, HKT, Shaker

DUAN Hui-rong, ZHOU Xue-hui, HU Jing, DUAN Xiao-rong, TIAN Fu-ping, CUI Guang-xin, WANG Chun-mei, YANG Hong-shan. Advances in understanding molecular mechanisms of K⁺ uptake and transport in higher plants[J]. Acta Prataculturae Sinica, 2019, 28(9): 174-191.

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Advances in understanding molecular mechanisms of K⁺ uptake and transport in higher plants

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