Overexpression of BnaXTH22 Improving Resistance to Aluminum Toxicity in Rapeseed (Brassica napus L.)
文献类型： 外文期刊
作者： Yu, Paolan 1 ; Han, Depeng 1 ; Chen, Ming 1 ; Yang, Lei 1 ; Li, Yazhen 1 ; Huang, Tianbao 1 ; Xiong, Wen 1 ; Cheng, Yewei 1 ; Liu, Xiaosan 1 ; Wan, Changyan 1 ; Zheng, Wei 1 ; Xiao, Xiaojun 1 ;
作者机构： 1.Jiangxi Inst Red Soil & Germplasm Resources, Key Lab Arable Land Improvement & Qual Improvement, Nanchang 330046, Peoples R China
关键词：
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.7 ）
ISSN： 1661-6596
年卷期： 2025 年 26 卷 12 期
页码：
收录情况： SCI
摘要： The cell wall, acting as the first line of defense against aluminum (Al) toxicity, is the primary cellular structure that encounters and perceives Al3+. Xyloglucan endotransglucosylase/hydrolase (XTH) plays a pivotal role in mediating cell wall remodeling, a critical mechanism for Al toxicity tolerance. In our previous studies, the candidate gene BnaXTH22 was identified through GWAS and RNA-seq analyses. Under Al toxicity stress, overexpression lines (OEs) exhibited a significant increase in the relative elongation of taproots (9.44-13.32%) and total root length (8.15-12.89%) compared to the wild type (WT). Following Al treatment, OEs displayed reduced MDA content and lower relative electrical conductivity, alongside a significantly higher root activity than WT. Transcriptomic analysis revealed that differentially expressed genes in OE under Al toxicity were predominantly enriched in stress-related biological processes, including phenylpropanoid metabolism, fatty acid biosynthesis, and lignin biosynthesis. These results suggest that BnaXTH22 overexpression could enhance Al toxicity tolerance in rapeseed, potentially by modulating cell wall synthesis to bolster plant resistance.
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