文献类型：期刊文献

英文题名：Comparative metabolomics analysis reveals different metabolic responses to drought in tolerant and susceptible poplar species

作者：Jia, Huixia[1] Wang, Lijuan[1] Li, Jianbo[2] Sun, Pei[1] Lu, Mengzhu[1] Hu, Jianjun[1]

第一作者：Jia, Huixia

通信作者：Hu, JJ[1]

机构：[1]Chinese Acad Forestry, Key Lab Tree Breeding & Cultivat, State Key Lab Tree Genet & Breeding, Res Inst Forestry,Natl Forestry & Grassland Adm, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Expt Ctr Forestry North China, Beijing 102300, Peoples R China

年份：2020

卷号：168

期号：3

起止页码：531-546

外文期刊名：PHYSIOLOGIA PLANTARUM

收录：;Scopus(收录号：2-s2.0-85075468788);WOS:【SCI-EXPANDED(收录号:WOS:000498130600001)】；

基金：This work was supported by National Nonprofit Institute Research Grant of Chinese Academy of Forestry (CAFYBB2017ZY008) and (CAFYBB2018ZY001-9), Natural Science Foundation of China (31570669) and China Postdoctoral Science Foundation (2018M631625).

语种：英文

摘要：Drought is one of the critical factors limiting tree growth and survival. Clarifying the adaptation to drought will facilitate the cultivation of drought-tolerant varieties. Metabolites, as direct signatures of biochemical functions, can uncover the biochemical pathways involved in drought responses. Here, we investigated the physiological and metabolic responses of drought-tolerant Populus simonii and drought-susceptible Populus deltoides cv. 'Danhong' to drought. Under drought conditions, P. simonii grew better and had a higher photosynthetic rate than P. deltoides cv. 'Danhong'. Global untargeted metabolite profiling was analyzed using gas chromatography time-of-flight mass spectrometry system. A total of 69 and 53 differentially accumulated metabolites were identified in drought-stressed P. simonii and P. deltoides cv. 'Danhong', respectively. The metabolisms of carbohydrate, amino acid, lipid and energy were involved in the drought responses common to both poplar species. The citric acid cycle was significantly inhibited to conserve energy, whereas multiple carbohydrates acting as osmolytes and osmoprotectants were induced to alleviate the adverse effects of drought stress. Unlike P. deltoides cv. 'Danhong', P. simonii underwent a specific metabolic reprogramming that enhanced non-enzymatic antioxidants, coordinated the cellular carbon/nitrogen balance and regulated wax biosynthesis. These results provide a reference for characterizing the mechanisms involved in poplar response to drought and for enhancing the drought tolerance of forest trees.