DORMANCY AND GERMINATION IN SHORT-LIVED LEPIDIUM PERFOLIATUM L. (BRASSICACEAE) SEEDS
Tang, An-Jun1,2,3; Tian, Mei-Hua2; Long, Chun-Lin1,3
2010
发表期刊PAKISTAN JOURNAL OF BOTANY
ISSN0556-3321
卷号42期号:1页码:201-211
摘要To understand germination timing in an ecological context, the response to environmental events that effect seed dormancy is central and has to be combined with knowledge of germination responses to different ecological factors. In this study, seed dormancy, germination and seedling survival of annual short-lived clasping pepperweed Lepidium perfoliatum L. (Brassicaceae) were investigated. Three types of pre-treatments viz., various temperature dry storage, light and water stress were tested as possible dormancy-and survival-affecting environmental events. Fresh mature seeds were greatly dormant. Warm (30 degrees C) dry storage more facilitated breaking dormancy, they germinated well under apt conditions (e. g. 20 degrees C and 10/20 degrees C plus periodic light, 14 h/d). For those seeds which underwent after-ripening, they could germinate at a range of constant temperatures (4, 10, 15, 20, 25, and 30 degrees C) and one alternating temperature (10/20 degrees C). Under alternating temperature regimes, the final percent germination of L. perfoliatum seeds increased from 37 degrees C to 93% when temperature altered from 4/10 degrees C to 10/20 degrees C in light, then decreased with increasing temperature. The germination pattern under constant temperature conditions was similar to that under alternating temperature and significant differences in final percent germinations and rates of germination were observed among different temperatures. Under different light treatments, final germination of showed significant differences, only with 35% of germination percentage in dark, much lower than those in red and white light (i.e. 93% and 91%, respectively). GA(3) could promote the germination of non-dormant seeds in dark. When water potentials were reduced, final percent germination decreased dramatically, and few seeds germinated at -0.98 MPa (generated by PEG-8000). The changes of proline content in resultant seedlings were reverse to that of final percent germination with changing water potentials. The present findings show that the dormancy and germination patterns of L. perfoliatum are important mechanisms adaptive to the rigorous desert environmental conditions.
资助信息Authors thank Professor Yan Ping, Mr. Zhai Wei and Ms. Ma Zhen (Shihezi University, Xinjiang, China) for their kind helps in the filed. Ms. Selena Ahmed, Ph. D candidate of the New York Botanical Garden and the Graduate Center of the City University of New York critically read the manuscript and carefully edited the English. This work was supported financially by the Ministry of Education of China through its 111 & 985 projects (B08044 & MUC 985-3-3), the Ministry of Science and Technology of China (2005DKA21006) and the Chinese Academy of Sciences (KSCX2-YW-Z-0925).
学科领域Plant Sciences
收录类别SCI
语种英语
WOS研究方向Plant Sciences
WOS类目Plant Sciences
WOS记录号WOS:000275368200021
引用统计
被引频次:4[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/151853/3182
专题资源植物与生物技术所级重点实验室
作者单位1.Minzu Univ China, Coll Life & Environm Sci, Beijing 100081, Peoples R China
2.Chongqing Normal Univ, Coll Life Sci, Chongqing 400047, Peoples R China
3.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Peoples R China
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Tang, An-Jun,Tian, Mei-Hua,Long, Chun-Lin. DORMANCY AND GERMINATION IN SHORT-LIVED LEPIDIUM PERFOLIATUM L. (BRASSICACEAE) SEEDS[J]. PAKISTAN JOURNAL OF BOTANY,2010,42(1):201-211.
APA Tang, An-Jun,Tian, Mei-Hua,&Long, Chun-Lin.(2010).DORMANCY AND GERMINATION IN SHORT-LIVED LEPIDIUM PERFOLIATUM L. (BRASSICACEAE) SEEDS.PAKISTAN JOURNAL OF BOTANY,42(1),201-211.
MLA Tang, An-Jun,et al."DORMANCY AND GERMINATION IN SHORT-LIVED LEPIDIUM PERFOLIATUM L. (BRASSICACEAE) SEEDS".PAKISTAN JOURNAL OF BOTANY 42.1(2010):201-211.
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