文献类型：期刊文献

英文题名：Combined effects of water stress and salinity on growth, physiological, and biochemical traits in two walnut genotypes

作者：Wang, Baoqing[1,2] Zhang, Junpei[1] Pei, Dong[1] Yu, Lei[3]

第一作者：Wang, Baoqing

通信作者：Yu, L[1]

机构：[1]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat, State Forestry & Grassland Adm,Res Inst Forestry, Beijing, Peoples R China;[2]Xinjiang Forestry Acad, Akesu Natl Observat & Res Stn Chinese Forest Ecos, Urumqi, Peoples R China;[3]Hangzhou Normal Univ, Coll Life & Environm Sci, Dept Ecol, Hangzhou 311121, Peoples R China

年份：2021

卷号：172

期号：1

起止页码：176-187

外文期刊名：PHYSIOLOGIA PLANTARUM

收录：;Scopus(收录号：2-s2.0-85099025476);WOS:【SCI-EXPANDED(收录号:WOS:000605566700001)】；

基金：The authors thank Dr Helena Korpelainen and Dr Chunyang Li and the anonymous reviewer for taking their time to give us valuable suggestions to improve our manuscript. This work was supported by the National Key Research and Development Program of China (2019YFD1001603) and the Basal Research Fund of Central Public Welfare Scientific Institution of Chinese Academy of Forestry (CAFYBB2019ZY001).

语种：英文

摘要：Due to its great economic value, walnut (Juglans regia L.) has received increasing attention during recent years. However, water stress and salinity limit walnut growth, production, and quality. We employed two walnut genotypes, precocious walnut, and late-bearing walnut, to investigate their growth, photosynthetic capacity, non-structural carbohydrate contents, Cl- allocation, reactive oxygen species (ROS) accumulation, and osmotic regulation under water stress, salinity, and their combination. We found that late-bearing walnut showed higher total biomass and net photosynthetic rate, higher activities of antioxidant enzymes, higher osmoregulation, and lower ROS accumulation than precocious walnut under stressful conditions. In addition, late-bearing walnut restricted salt transport and allocated more Cl- into roots, whereas precocious walnut allocated more Cl- into leaves when exposed to salinity stress. These data collectively demonstrated that late-bearing walnut possesses better stress tolerance under water stress, salinity, and especially under their combination. Such knowledge of genotype-specific responses and tolerances to water stress and salinity is important for walnut plantation management under increasing drought and aggravated soil salinization occurring with climate change.