文献类型：期刊文献

英文题名：Physiological and metabolic responses of Salix sinopurpurea and Salix suchowensis to drought stress

作者：Jia, Huixia[1] Wang, Lijuan[1] Li, Jianbo[2] Sun, Pei[1] Lu, Mengzhu[1,3] Hu, Jianjun[1,3]

第一作者：Jia, Huixia

通信作者：Hu, JJ[1];Hu, JJ[2]

机构：[1]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat, Natl Forestry & Grassland Adm,Res Inst Forestry, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Expt Ctr Forestry North China, Beijing 102300, Peoples R China;[3]Nanjing Forestry Univ, Collaborat Innovat Ctr Sustainable Forestry South, Nanjing 210037, Jiangsu, Peoples R China

年份：2020

卷号：34

期号：2

起止页码：563-577

外文期刊名：TREES-STRUCTURE AND FUNCTION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000499554000001)】；

基金：This work was supported by National Nonprofit Institute Research Grant of CAF (CAFYBB2017ZY008) and (CAFYBB2018ZY001-9), and Natural Science Foundation of China (31800570).

语种：英文

外文关键词：Willow; Drought physiology; Metabolomics; Compatible solutes; Antioxidants

摘要：Key message Physiological and metabolic analysis showed the difference in drought tolerance and revealed the common and specific metabolic regulations in Salix sinopurpurea and Salix suchowensis. Willows (Salix spp.) are important woody plants as promising sources for sustainable and renewable biomass. However, drought is highly detrimental to their growth and development. Deciphering the adaptation mechanism of willows to drought will provide a theoretical basis for the cultivation of drought-tolerant varieties. In this work, we investigated the physiological and metabolic responses to drought stress in Salix sinopurpurea and Salix suchowensis. The drought experiment was conducted on clonal plants from cuttings of the two willow species under greenhouse conditions. S. sinopurpurea exhibited higher drought tolerance, as evidenced by lower growth reduction, and higher leaf relative water content, water use efficiency and net photosynthesis rate than those of S. suchowensis under the same drought conditions. Metabolic profiling identified 67 and 64 differentially accumulated metabolites in S. sinopurpurea and S. suchowensis, respectively. These metabolites function as compatible solutes and energy reserves and in antioxidant protection to defend against drought stress. Carbohydrate, amino acid and lipid metabolic pathways were central in the metabolic regulations of the drought response in the two willow species. The accumulation of aspartate, glutamate, serine, threonine, and sedoheptulose particularly in S. sinopurpurea might equip this species with drought tolerance. Meanwhile, phenylalanine and phytosterols were specifically inhibited in S. suchowensis, which might be associated with its susceptibility to drought stress. Taken together, these results provide a framework for better understanding the metabolic responses of willow to drought stress.