MaHAK5, a Potassium Transporter of Banana, Enhanced Potassium Uptake in Transgenic Arabidopsis under Low Potassium Conditions
文献类型： 外文期刊
作者： Wu, Bangting 1 ; Xie, Yanling 2 ; Xiang, Dandan 2 ; Yi, Ganjun 1 ; Liu, Hong 4 ; Li, Chunyu 1 ; Liu, Siwen 1 ;
作者机构： 1.Guangdong Lab Lingnan Modern Agr, Guangzhou 510640, Peoples R China
2.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Key Lab South Subtrop Fruit Biol & Genet Resource, Minist Agr,Key Lab Trop & Subtrop Fruit Tree Res G, Guangzhou 510640, Peoples R China
3.Guangdong Lab Lingnan Modern Agr Maoming Subctr, Maoming 525000, Peoples R China
4.Fujian Agr & Forestry Univ, Coll Resources & Environm, State Key Lab Ecol Pest Control Fujian & Taiwan Cr, Fuzhou 350002, Peoples R China
关键词： banana; MaHAK5; Potassium transporter; K+ uptake; low K+ stress
期刊名称：HORTICULTURAE （ 影响因子：3.1； 五年影响因子：3.4 ）
ISSN：
年卷期： 2023 年 9 卷 1 期
页码：
收录情况： SCI
摘要： Potassium (K+) is one of the most important macronutrients for plant growth and development. It is generally accepted that the KUP/HAK/KT transporters play essential roles in K+ uptake at low concentrations. However, their physiological functions in bananas remain unknown. Here, we cloned MaHAK5 and analyzed its functions in banana (Musa acuminata). Gene expression analysis showed that MaHAK5 was upregulated in the roots and leaves in the early stage of low K+ (LK) stress. MaHAK5 was localized in the cytomembrane. The expression of MaHAK5 improved the growth of the low K+-sensitive yeast mutant R5421 at different K+ supply levels. Overexpression of MaHAK5 in Arabidopsis thaliana significantly enhanced the ability for K+ uptake and increased the chlorophyll content under LK stress. These results indicate that MaHAK5 plays a crucial role in maintaining K+ uptake in bananas.
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