Environmental control of seed dormancy and germination in the short-lived Olimarabidopsis pumila (Brassicaceae)

doi:10.1016/j.jaridenv.2008.10.001

	Environmental control of seed dormancy and germination in the short-lived Olimarabidopsis pumila (Brassicaceae)
	Tang, A. J.1,2; Tian, M. H.3; Long, C. L.1,4
通讯作者	long@mail.kib.ac.cn
	2009-03-01
发表期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
卷号	73 期号:3 页码:385-388
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.
关键词	Ephemeral Gurbantonggut Desert Photoblastism Seed Dormancy Water Stress
学科领域	Ecology ; Environmental Sciences
DOI	10.1016/j.jaridenv.2008.10.001
收录类别	SCI
语种	英语
WOS记录号	WOS:000263791100020
引用统计	被引频次：6[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/151853/14081
专题	资源植物与生物技术所级重点实验室
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
推荐引用方式 GB/T 7714	Tang, A. J.,Tian, M. H.,Long, C. L.. Environmental control of seed dormancy and germination in the short-lived Olimarabidopsis pumila (Brassicaceae)[J]. JOURNAL OF ARID ENVIRONMENTS,2009,73(3):385-388.
APA	Tang, A. J.,Tian, M. H.,&Long, C. L..(2009).Environmental control of seed dormancy and germination in the short-lived Olimarabidopsis pumila (Brassicaceae).JOURNAL OF ARID ENVIRONMENTS,73(3),385-388.
MLA	Tang, A. J.,et al."Environmental control of seed dormancy and germination in the short-lived Olimarabidopsis pumila (Brassicaceae)".JOURNAL OF ARID ENVIRONMENTS 73.3(2009):385-388.

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