Arid
DOI10.1016/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
ISSN0140-1963
EISSN1095-922X
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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