Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jaridenv.2013.10.010 |
Testing seed germination responses to water and salinity stresses to gain insight on suitable microhabitats for restoration of cold desert shrubs | |
Zeng, Y. J.1; Wang, Y. R.1; Baskin, C. C.2; Baskin, J. M.3 | |
通讯作者 | Wang, Y. R. |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS
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ISSN | 0140-1963 |
EISSN | 1095-922X |
出版年 | 2014 |
卷号 | 100页码:89-92 |
英文摘要 | Although congeneric species grow in the same desert, responses of their seeds to water and salinity stress may differ, thus resulting in variation in microhabitats that are suitable for restoration. Experiments were performed to determine seed germination responses to water limitation and salinity stress (imposed by increasing concentrations of polyethylene glycol (PEG) and sodium chloride (NaCl), respectively) of Nitraria tangutorum and Nitraria sibirica, two xerophytic and halophytic shrubs in the cold deserts of northwest China. Germination percentages of both species decreased with a decrease in PEG water potentials. The lowest PEG water potential for germination was -0.9 MPa for N. tangutorum and -1.5 MPa for N. sibirica. All concentrations of NaCl had negative effects on germination of N. tangutorum seeds, whereas germination of N. sibirica was promoted under low salinity (-0.3 MPa NaCl). The lowest osmotic potential of NaCl solutions under which seeds could germinate was -1.2 MPa for N. tangutorum and -1.8 MPa for N. sibirica. These germination responses to water limitation and salinity generally were correlated with the ecological distribution of the two species in the desert and indicate that seeds of N. sibirica potentially would germinate in more stressful microhabitats than those of N. tangutorum. (C) 2013 Elsevier Ltd. All rights reserved. |
英文关键词 | Desert shrub Halophyte Nitraria Salinity Water limitation Xerophytes |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000328716600011 |
WOS关键词 | NITRARIA-TANGUTORUM BOBR. ; SIBIRICA PALL ; CHINA |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | 兰州大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/182981 |
作者单位 | 1.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Key Lab Grassland Agroecosyst, State Key Lab Grassland Agroecosyst,Minist Agr, Lanzhou 730020, Peoples R China; 2.Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA; 3.Univ Kentucky, Dept Biol, Lexington, KY 40506 USA |
推荐引用方式 GB/T 7714 | Zeng, Y. J.,Wang, Y. R.,Baskin, C. C.,et al. Testing seed germination responses to water and salinity stresses to gain insight on suitable microhabitats for restoration of cold desert shrubs[J]. 兰州大学,2014,100:89-92. |
APA | Zeng, Y. J.,Wang, Y. R.,Baskin, C. C.,&Baskin, J. M..(2014).Testing seed germination responses to water and salinity stresses to gain insight on suitable microhabitats for restoration of cold desert shrubs.JOURNAL OF ARID ENVIRONMENTS,100,89-92. |
MLA | Zeng, Y. J.,et al."Testing seed germination responses to water and salinity stresses to gain insight on suitable microhabitats for restoration of cold desert shrubs".JOURNAL OF ARID ENVIRONMENTS 100(2014):89-92. |
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