文献类型：期刊文献

英文题名：The regulating mechanism of salt tolerance of black walnut seedlings was revealed by the physiological and biochemical integration analysis

作者：Ji, Xinying[1] Tang, Jiali[1] Zheng, Xu[1] Li, Ao[1] Zhang, Junpei[1]

第一作者：Ji, Xinying

通信作者：Zhang, JP[1]

机构：[1]Chinese Acad Forestry, State Forestry & Grassland Adm, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat,Res Inst Forestry, Beijing 100091, Peoples R China

年份：2024

卷号：210

外文期刊名：PLANT PHYSIOLOGY AND BIOCHEMISTRY

收录：;Scopus(收录号：2-s2.0-85188965193);WOS:【SCI-EXPANDED(收录号:WOS:001290886100001)】；

基金：Funding This work was supported by the National Key Research and Devel-opment Program of China (Grant Number: 2022YFD2200402) .

语种：英文

外文关键词：Black walnut; Salt stress; Osmotic regulation; Antioxidant activity; Ion balance; Endogenous hormone

摘要：Salt stress is an important abiotic stress that seriously affects plant growth. In order to research the salt tolerance of walnut rootstocks so as to provide scientific basis for screening salt-tolerant walnut rootstocks, two kinds of black walnut seedlings, Juglans microcarpa L. (JM) and Juglans nigra L. (JN), were treated under salt stress with different concentrations of NaCl (0, 50, 100, and 200 mM) and the growth situation of seedlings were observed. The physiological indexes of JM and JN seedlings were also measured in different days after treatment. Our study showed salt stress inhibited seedlings growth and limited biomass accumulation. Walnut mainly increased osmotic adjustment ability by accumulation Pro and SS. Furthermore, with the duration of treatment time increased, SOD and APX activities decreased, TPC and TFC contents increased. Walnut accumulated Na mostly in roots and transported more K and Ca to aboveground parts. The growth and physiological response performance differed between JM and JN, specifically, the differences occurred in the ability to absorb minerals, regulate osmotic stress, and scavenge ROS. Salt tolerance of JM and JN was assessed by principal component analysis (PCA) and resulted in JN > JM. In conclusion, our results indicated that JN has higher salt tolerance than JM, and JN might be used as a potential germplasm resource for the genetic breeding of walnuts.