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农业科学学报 (英文)
2023,22
(8)
Position: Home > Articles > SlTPP4 participates in ABA-mediated salt tolerance by enhancing root architecture in tomato
Journal of Integrative Agriculture
2023,22
(8)
SlTPP4 participates in ABA-mediated salt tolerance by enhancing root architecture in tomato
作 者：
Du, Dan;Hu, Xin;Song, Xiao-mei;Xia, Xiao-jiao;Sun, Zhen-yu;Lang, Min;Pan, Yang-lu;Zheng, Yu;Pan, Yu
单 位：
Chongqing Vocat Inst Engn, Chongqing 402260, Peoples R China;Southwest Univ, Coll Hort & Landscape Architecture, Key Lab Hort Sci Southern Mountainous Reg, Minist Educ,Acad Agr Sci, Chongqing 400715, Peoples R China
关键词：
trehalose-6-phosphate phosphatase (TPP);salt tolerance;root;ABA;tomato ( Solanum lycopersicum )
摘 要：
Salinity tolerance is an important physiological index for crop breeding. Roots are typically the first plant tissue to withstand salt stress. In this study, we found that the tomato (Solanum lycopersicum) trehalose-6-phosphate phosphatase (SlTPP4) gene is induced by abscisic acid (ABA) and salt, and is mainly expressed in roots. Overexpression of SlTPP4 in tomato enhanced tolerance to salt stress, resulting in better growth performance. Under saline conditions, SlTPP4 overexpression plants demonstrated enhanced sucrose metabolism, as well as increased expression of genes related to salt tolerance. At the same time, expression of genes related to ABA biosynthesis and signal transduction was enhanced or altered, respectively. In-depth exploration demonstrated that SlTPP4 enhances Casparian band development in roots to restrict the intake of Na+. Our study thus clarifies the mechanism of SlTPP4-mediated salt tolerance, which will be of great importance for the breeding of salt-tolerant tomato crops.
