AhASRK1, a peanut dual-specificity kinase that activates the Ca2+-ROS-MAPK signalling cascade to mediate programmed cell death induced by aluminium toxicity via ABA
文献类型： 外文期刊
作者： Fu, Xue-zhen 1 ; Wang, Xin 1 ; Liu, Jing-jing 1 ; Chen, Yu-xi 1 ; Wang, Ai-qin 1 ; Zhan, Jie 1 ; Han, Zhu-qiang 4 ; He, Long-fei 1 ; Xiao, Dong 1 ;
作者机构： 1.Guangxi Univ, Coll Agr, Guangxi Key Lab Agroenvironm & Agroprod Safety, Nanning 530004, Peoples R China
2.Guangxi Univ, Coll Agr, Natl Demonstrat Ctr Expt Plant Sci Educ, Nanning 530004, Peoples R China
3.Guangxi Univ, Key Lab Crop Cultivat & Tillage, Nanning 530004, Peoples R China
4.Guangxi Acad Agr Sci, Cash Crops Res Inst, Nanning 530007, Peoples R China
关键词： Peanut; AhASRK1; Al stress; ABA; ROS; MAPK
期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：5.7； 五年影响因子：6.4 ）
ISSN： 0981-9428
年卷期： 2025 年 220 卷
页码：
收录情况： SCI
摘要： Aluminium (Al)-induced programmed cell death (PCD) is thought to be a main cause of Al phytotoxicity. However, the underlying mechanism by which Al induces PCD in plants is unclear. In this study, we characterized the function of AhASRK1 (Aluminum Sensitive Receptor-like protein Kinase1), an Al-induced LRR-type receptor-like kinase gene. AhASRK1 was localized on the plasma membrane. A kinase assay of recombinant cytoplasmic domains of AhASRK1 revealed that this leucine-rich repeat-receptor-like protein kinase autophosphorylates both serine/threonine and tyrosine residues. The role of AhASRK1 in regulating Al-induced PCD was investigated in roots. Al treatment significantly inhibited root growth and promoted ROS production and cell death after AhASRK1 was overexpressed in Arabidopsis, whereas the knockdown of AhASRK1 in peanut increased Al tolerance. AhASRK1 overexpression resulted in increased accumulation of apical calcium ions (Ca2+) and increased MAPK signalling under Al treatment; however, the AhASRK1-knockdown peanut lines exhibited a decrease in the Ca2+ concentration under Al stress. Furthermore, inhibition of ABA biosynthesis mitigated PCD occurrence and ROS accumulation under Al stress, as did Al-induced Ca2+ and p MAPK signalling. These results suggest that AhASRK1 mediates the occurrence of PCD through the ABA pathway to mediate the accumulation of Ca2+ and the production of ROS, thereby activating MAPK signalling. Additionally, AhASRK1 overexpression promoted leaf senescence and induced the transcription of a multitude of ABA-related genes. This study provides new clues for improving the phytotoxicity of Al in acidic soils.
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