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题名: Environmental control of seed dormancy and germination in the short-lived Olimarabidopsis pumila (Brassicaceae)
作者: Tang, A. J.1, 2; Tian, M. H.3; Long, C. L.1, 4
刊名: JOURNAL OF ARID ENVIRONMENTS
关键词: Ephemeral ; Gurbantonggut desert ; Photoblastism ; Seed dormancy ; Water stress
英文摘要: The purpose of our Study was to better understand seed germination ecology of the spring annual short-lived Olimarabidopsis pumila, which grows in the Gurbantonggut Desert, China. Seeds underwent after-ripening at 4, 20 1 2 (room temperature) and 30 degrees C. After dormancy was broken, germination capacity was a function of temperature and presence of light. For the temperature range Studied (4-30 degrees C), germination capacity was significantly higher between 15 and 25 degrees C than at temperatures above or below them. Alternating temperatures of 20/10, 25/10 and 25/15 degrees C were favorable for germination. Although GA(3) did promote dark germination of seeds, GA(3) did not replace light for germination, Seeds germinated to >75% if light exposure time was over 8 h and temperature and moisture conditions were favorable. Seeds were able to germinate at relatively low water potentials (83% at -0.41 MPa), but decreasing water potentials produced detrimental effects on germination percentage and rate. Thus, dormancy characteristics and germination behavior of O. pumila seeds ensure that germination occurs in the desert only when soil moisture conditions are favorable for seedling establishment and survival. (C) 2008 Elsevier Ltd. All rights reserved.
出版日期: 2009-03-01
卷号: 73, 期号:3, 页码:385-388
DOI标识: 10.1016/j.jaridenv.2008.10.001
语种: 英语
收录类别: SCI
学科分类: Ecology; Environmental Sciences
ISSN号: 0140-1963
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/14081
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Kunming 650223, Peoples R China
4.Cent Univ Nationalities, Coll Life & Environm Sci, Beijing 100081, Peoples R China

Recommended Citation:
Tang, AJ; Tian, MH; Long, CL.Environmental control of seed dormancy and germination in the short-lived Olimarabidopsis pumila (Brassicaceae),JOURNAL OF ARID ENVIRONMENTS,2009,73(3):385-388
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