Genome-wide analysis of HAK/KUP/KT potassium transporter genes in banana (Musa acuminata L.) and their tissue-specific expression profiles under potassium stress

文献类型： 外文期刊

第一作者： Liu, Siwen

作者： Liu, Siwen;Wu, Bangting;Xie, Yanling;Xiang, Dandan;Li, Chunyu;Zheng, Sijun;Zheng, Sijun;Xie, Jianghui;Wang, Wei

作者机构：

关键词： Banana; Potassium; HAK; KUP; KT gene family; Abiotic stress; Expression profiles

期刊名称：PLANT GROWTH REGULATION （ 影响因子：3.242； 五年影响因子：3.607 ）

ISSN： 0167-6903

年卷期： 2022 年 97 卷 1 期

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收录情况： SCI

摘要： Potassium is one of the most essential inorganic cations for plant growth and development. The high affinity K+ (HAK)/K+ uptake (KUP)/K+ transporter (KT) family plays essential roles in the regulation of cellular K+ levels and the maintenance of osmotic balance. However, the roles of these genes in the responses of bananas to low-potassium stress are unclear. In this study, 24 HAK/KUP/KT (MaHAK) genes were identified from banana. These genes were further classified into four groups based on phylogenetic analysis, gene structure and conserved domain analysis. Segmental duplication events played an important role in the expansion of the MaHAK gene family. Transcriptome analysis revealed the expression patterns of MaHAKs in various tissues under different K+ conditions. MaHAK14b was upregulated under both short- and long-term K+-deficient conditions, suggesting that it plays crucial roles in K+ uptake at low K+ concentrations. Furthermore, MaHAK14b mediated K+ uptake when it was heterologously expressed in the yeast mutant R5421 on low K+ medium. Collectively, these findings provide a foundation for further functional analysis of MaHAK genes, which may be used to improve potassium stress resistance in bananas.

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