The Mechanisms Underlying Salt Resistance Mediated by Exogenous Application of 24-Epibrassinolide in Peanut
文献类型： 外文期刊
作者： Li, Wenjiao 1 ; Sun, Jie 1 ; Zhang, Xiaoqian 1 ; Ahmad, Naveed 1 ; Hou, Lei 1 ; Zhao, Chuanzhi 1 ; Pan, Jiaowen 1 ; Tian, Ruizheng 1 ; Wang, Xingjun 1 ; Zhao, Shuzhen 1 ;
作者机构： 1.Shandong Acad Agr Sci, Inst Crop Germplasm Resources, Shandong Prov Key Lab Crop Genet Improvement Ecol, Jinan 250100, Peoples R China
2.Shandong Normal Univ, Coll Life Sci, Jinan 250014, Peoples R China
关键词： Arachis hypogaea; 24-epibrassinolide; salt stress; osmotic adjustment; RNA-Seq
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）
ISSN：
年卷期： 2022 年 23 卷 12 期
页码：
收录情况： SCI
摘要： Peanut is one of the most important oil crops in the world, the growth and productivity of which are severely affected by salt stress. 24-epibrassinolide (EBL) plays an important role in stress resistances. However, the roles of exogenous EBL on the salt tolerance of peanut remain unclear. In this study, peanut seedlings treated with 150 mM NaCl and with or without EBL spray were performed to investigate the roles of EBL on salt resistance. Under 150 mM NaCl conditions, foliar application of 0.1 mu M EBL increased the activity of catalase and thereby could eliminate reactive oxygen species (ROS). Similarly, EBL application promoted the accumulation of proline and soluble sugar, thus maintaining osmotic balance. Furthermore, foliar EBL spray enhanced the total chlorophyll content and high photosynthesis capacity. Transcriptome analysis showed that under NaCl stress, EBL treatment up-regulated expression levels of genes encoding peroxisomal nicotinamide adenine dinucleotide carrier (PMP34), probable sucrose-phosphate synthase 2 (SPS2) beta-fructofuranosidase (BFRUCT1) and Na+/H+ antiporters (NHX7 and NHX8), while down-regulated proline dehydrogenase 2 (PRODH). These findings provide valuable resources for salt resistance study in peanut and lay the foundation for using BR to enhance salt tolerance during peanut production.
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