干旱区生态环境知识资源中心(Arid): Effects of water stress and NaCl stress on different life cycle stages of the cold desert annual Lachnoloma lehmannii in China

Arid

	Effects of water stress and NaCl stress on different life cycle stages of the cold desert annual Lachnoloma lehmannii in China
	Mamut Jannathan; Tan Dunyan; Baskin Carol C; Baskin Jerry M
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2019
卷号	11 期号:5 页码:774-784
英文摘要	For a plant species to complete its life cycle in arid and saline environments, each stage of the life cycle must be tolerant to the harsh environmental conditions. The aim of the study was to determine the effects of water stress (water potentials of -0.05, -0.16, -0.33, -0.56, -0.85 and -1.21 MPa) and NaCl stress (50, 100, 200, 300, 400, 500 and 600 mmol/L NaCl) on seed germination percentage, seedling survival and growth, juvenile growth and plant reproduction of Lachnoloma lehmannii Bunge (Brassicaceae), an cold desert annual that grows in the Junggar Basin of Xinjiang, China in 2010. Results indicated that low water stress (-0.05 and -0.16 MPa) had no significant effect on seed germination percentage. With a decrease in water potential, germination percentage decreased, and no seeds germinated at -0.85 and -1.21 MPa water stresses. Germination percentage of seeds was significantly affected by NaCl stress, and higher germination percentages were observed under non-saline than saline conditions. An increase in NaCl concentrations progressively inhibited seed germination percentage, and no seeds germinated at ≥400 mmol/L NaCl concentration. Non-germinated seeds were transferred from both PEG (polyethylene glycol-6000) and NaCl solutions to distilled water for seed germination recovery. The number of surviving seedlings and their heights and root lengths significantly decreased as NaCl stress increased. About 30% of the plants survived and produced fruits/seeds at 200 mmol/L NaCl concentration. Thus, seed germination, seedling establishment and reproductive stage in the life cycle of L. lehmannii are water- and salt-tolerant, with seedlings being the least tolerant. These tolerances help explain why this species can survive and produce seeds in arid and saline habitats.
英文关键词	drought stress Lachnoloma lehmannii salinity tolerance seed germination seedling growth
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6595740
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336197
作者单位	Mamut Jannathan, Key Laboratory for Western Arid Region Grassland Resources and Ecology, College of Grassland and Environment Sciences, Xinjiang Agricultural University, Xinjiang Key Laboratory of Grassland Resources and Ecology and Ministry of Education, Urumqi, Xinjiang 830052, China.; Tan Dunyan, Key Laboratory for Western Arid Region Grassland Resources and Ecology, College of Grassland and Environment Sciences, Xinjiang Agricultural University;;College of Biology and Environmental Sciences, Jishou University, Xinjiang Key Laboratory of Grassland Resources and Ecology and Ministry of Education;;, Urumqi;;Jishou, ;; 830052;;416000.; Baskin Carol C, Key Laboratory for Western Arid Region Grassland Resources and Ecology, College of Grassland and Environment Sciences, Xinjiang Agricultural University;;Department of Biology, University of Kentucky;;Department of Plant and Soil Sciences, University of Kentucky, Xinjiang Key Laboratory of Grassland Resources and Ecology and Ministry of Education;;;;, Urumqi;...
推荐引用方式 GB/T 7714	Mamut Jannathan,Tan Dunyan,Baskin Carol C,et al. Effects of water stress and NaCl stress on different life cycle stages of the cold desert annual Lachnoloma lehmannii in China[J],2019,11(5):774-784.
APA	Mamut Jannathan,Tan Dunyan,Baskin Carol C,&Baskin Jerry M.(2019).Effects of water stress and NaCl stress on different life cycle stages of the cold desert annual Lachnoloma lehmannii in China.Journal of Arid Land,11(5),774-784.
MLA	Mamut Jannathan,et al."Effects of water stress and NaCl stress on different life cycle stages of the cold desert annual Lachnoloma lehmannii in China".Journal of Arid Land 11.5(2019):774-784.