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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
Corresponding Authorlong@mail.kib.ac.cn
2009-03-01
Source PublicationJOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
Volume73Issue:3Pages:385-388
AbstractThe 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.
KeywordEphemeral Gurbantonggut Desert Photoblastism Seed Dormancy Water Stress
Subject AreaEcology ; Environmental Sciences
DOI10.1016/j.jaridenv.2008.10.001
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEcology ; Environmental Sciences
WOS IDWOS:000263791100020
Citation statistics
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/14081
Collection资源植物与生物技术所级重点实验室
Affiliation1.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
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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