Author:
Wang Lirong,Du Meng,Wang Bo,Duan Huirong,Zhang Benyin,Wang Dong,Li Yi,Wang Jiuli
Abstract
AbstractAs a typical halophyte, Nitraria tangutorum Bobr. has attracted the interest of many researchers with the excellent salt tolerance. Elucidation of the mechanism of N. tangutorum salinity tolerance will facilitate the genetic improvement of productive plants faced with salinity. To reveal the molecular response to gradually accumulated salt stress in N. tangutorum, RNA-sequencing and analysis of gradually accumulated NaCl treated samples and control samples were performed, and a total of 1419 differentially expressed genes were identified, including 949 down-regulated genes and 470 up-regulated genes. Detailed analysis uncovered that the catabolism of organic compounds mainly based on oxidative phosphorylation genes was up-regulated. Additionally, various antioxidant genes, especially anthocyanin-related genes, were found to help N. tangutorum remove reactive oxygen species. Moreover, the Mitogen activated protein kinase signaling pathway and other signaling pathways co-regulated various salt tolerance activities. Additionally, intracellular ion homeostasis was maintained via regulation of osmotic regulator-related genes, cutin-related genes, and cell elongation-related genes to retain cellular water and reduce ion concentration. In particularly, simultaneous up-regulation in cytoskeleton-related genes, cell wall-related genes, and auxin-related genes, provided evidence of important role of cell expansion in plant salt tolerance. In conclusion, complex regulatory mechanisms modulated by multiple genes might contribute to the salt tolerance by N. tangutorum.
Funder
Natural Science Foundation of Qinghai Province
National Natural Science Foundation of China
Foundation of Qinghai Nationalities University
Forestry and Grassland Science and Technology Innovation Project of Gansu Province
Central Financial Foundation for Forestry Science and Technology Promotion Demonstration
Regular Science and Technology Assistance Projects of the Ministry of Science and Technology to Developing Countries
Publisher
Springer Science and Business Media LLC
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