Habitat-specific responses of seed germination and seedling establishment to soil water condition in two Rheum species in the high Sino-Himalayas
Song, Bo1,2; Stoecklin, Juerg3; Gao, Yong-Qian4; Zhang, Zhi-Qiang1; Yang, Yang1; Li, Zhi-Ming5; Sun, Hang1
2013-07-01
发表期刊ECOLOGICAL RESEARCH
ISSN0912-3814
卷号28期号:4页码:643-651
摘要Knowledge of how germination and seedling establishment respond to soil water condition is crucial for plant conservation under global warming and land-use changes. We tested the flooding and drought tolerance of two plant species with different occurrences along a soil water gradient by assessing seed germination, seedling survival, seedling growth, and root characteristics. In the high Sino-Himalayas, Rheum alexandrae typically occurs in wetlands, R. nobile in scree or open slope with well-drained soils. Seeds and seedlings of the two species were subjected to different soil water conditions in controlled greenhouse experiments. Seed germination in both species was inhibited by high soil water content; however, seeds of R. alexandrae were more tolerant to flooding, especially to submergence. Seedling survival, biomass accumulation, root diameter, and root porosity of R. alexandrae increased significantly with increased soil water content, but submergence was lethal for seedlings. Seedling survival, biomass accumulation, and root length of R. nobile increased significantly in response to reduced soil water content. These results indicate that in the two species, seed germination and seedling establishment in response to different soil water condition are habitat-specific. Because both species are susceptible to moderate changes in soil water condition, their species-specific requirements with respect to this factor should be a consideration when planning their conservation.
关键词Drought Flooding Stress Tolerance Seed Germination Seedling Establishment
资助信息Chinese Academy of Sciences [XDB03030112]; National Natural Science Foundation of China [40930209, 31061160184, 31100179, 31200184]; Hundred Talents Program of the Chinese Academy of Science [2011312D11022]; Natural Science Foundation of Yunnan Province [2011FB102]; Western Light Talent Culture Project
学科领域Ecology
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Ecology
WOS记录号WOS:000321965400011
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/16813
专题中国科学院东亚植物多样性与生物地理学重点实验室
作者单位1.Chinese Acad Sci, Key Lab Biodivers & Biogeog, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Univ Basel, Inst Bot, CH-4056 Basel, Switzerland
4.Yunnan Forestry Technol Coll, Kunming 650224, Yunnan, Peoples R China
5.Yunnan Normal Univ, Sch Life Sci, Kunming 650092, Yunnan, Peoples R China
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GB/T 7714
Song, Bo,Stoecklin, Juerg,Gao, Yong-Qian,et al. Habitat-specific responses of seed germination and seedling establishment to soil water condition in two Rheum species in the high Sino-Himalayas[J]. ECOLOGICAL RESEARCH,2013,28(4):643-651.
APA Song, Bo.,Stoecklin, Juerg.,Gao, Yong-Qian.,Zhang, Zhi-Qiang.,Yang, Yang.,...&Sun, Hang.(2013).Habitat-specific responses of seed germination and seedling establishment to soil water condition in two Rheum species in the high Sino-Himalayas.ECOLOGICAL RESEARCH,28(4),643-651.
MLA Song, Bo,et al."Habitat-specific responses of seed germination and seedling establishment to soil water condition in two Rheum species in the high Sino-Himalayas".ECOLOGICAL RESEARCH 28.4(2013):643-651.
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