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
2009-03-01
发表期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
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
资助信息We must thank Prof C.C. Baskin and J.M. Baskin (University of Kentucky, Lexington, KY, USA) for their critical comments and editing the English. This study was funded by the Ministry of Science and Technology of China (2005DKA21006), and the Ministry of Education of China through its III Project (B08044, CUN 985-3-3).
学科领域Ecology ; Environmental Sciences
DOI10.1016/j.jaridenv.2008.10.001
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Ecology ; Environmental Sciences
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
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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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