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Overexpression of PagLOL1b improves drought tolerance through increasing water use efficiency and reactive oxygen species scavenging in transgenic poplar

文献类型： 外文期刊

作者： Chao, Erkun 1 ; Song, Shuo 1 ; Guo, Yu 1 ; Liu, Yihua 3 ; Zhao, Yanqiu 1 ; Zhang, Hongxia 1 ;

作者机构： 1.Ludong Univ, Engn Res Inst Agr & Forestry, 186 Hongqizhong Rd, Yantai 264025, Shandong, Peoples R China

2.Qufu Normal Univ, Coll Life Sci, 57 Jingxuanxi Rd, Qufu 273165, Shandong, Peoples R China

3.Linyi Univ, Coll Agr & Forestry Sci, Middle Sect Shuangling Rd, Linyi 276000, Shandong, Peoples R China

4.Shandong Acad Agr Sci, Inst Agr Resources & Environm, State Key Lab Nutrient Use & Management, 23788 Gongye North Rd, Jinan 250100, Shandong, Peoples R China

5.Zhaoyuan Shenghui Agr Technol Dev Co Ltd, Zhaoyuan 265400, Shandong, Peoples R China

关键词： Poplar; LSD gene family; Drought tolerance

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.5； 五年影响因子：8.7 ）

ISSN： 0141-8130

年卷期： 2024 年 278 卷

页码：

收录情况： SCI

摘要： LESION SIMULATING DISEASE1 (LSD) family genes play a key role in plant response to abiotic and biotic stress. However, their functions in the resistance of tree to drought stress are still largely not clear. Here, five LSD family genes in poplar genome were identified. Phylogenetic and collinear relationship analysis showed that they belonged to LSD, LSD-one-like 1 (LOL1) and LSD-one-like 2 (LOL2) subfamilies, and experienced two segmental duplication events. PagLSDs were highly conserved in gene structure, and all PagLSDs contained at least two LSD domains. Expression pattern and cis-acting element analyses showed that PagLSDs were widely expressed in different organs, significantly induced by polyethylene glycol, and possessed a great number of plant growth, development, plant hormones, and biotic and abiotic stress elements in their promoter regions. Further physiological experiments with transgenic poplar plants revealed that overexpression of PagLOL1b significantly enhanced the drought tolerance of transgenic plants. The improved drought tolerance was closely associated with the significant increase in stomatal closure, water use efficiency, antioxidant enzyme gene expression and antioxidant enzyme activity in transgenic plants. The results in our study imply that PagLOL1b has great potential in the engineering of new tree varieties resistant to drought stress.

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