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Recent Advances in Genome-wide Analyses of Plant Potassium Transporter Families

Author(s):

Dhondup Lhamo*, Chao Wang, Qifei Gao and Sheng Luan   Pages 1 - 17 ( 17 )

Abstract:


Plants require potassium (K+) as a macronutrient to support numerous physiological processes. Understanding how this nutrient is transported, stored, and utilized within plants is crucial for breeding crops with high K+ use efficiency. As K+ is not metabolized, cross-membrane transport becomes a rate-limiting step for efficient distribution and utilization in plants. Several K+ transporter families, such as KUP/HAK/KT and KEA transporters and Shaker-like and TPK channels, play dominant roles in plant K+ transport processes. In this review, we provide a comprehensive contemporary overview of our knowledge about these K+ transporter families in angiosperms, with a major focus on the genome-wide identification of K+ transporter families, subcellular localization, spatial expression, function and regulation. We also expanded the genome-wide search for the K+ transporter genes and examined their tissue-specific expression in Camelina sativa, a polyploid oil-seed crop with a potential to adapt to marginal lands for biofuel purposes and contribution to sustainable agriculture. In addition, we present new insights and emphasis on the study of K+ transporters in polyploids in an effort to generate crops with high K+ utilization efficiency (KUE).

Keywords:

KUP/HAK/KT transporters, shaker-like channels, TPK channels, KEA transporters, subcellular localization, gene expression, function, Camelina sativa.

Affiliation:

Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720



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