Seed dormancy and germination of three herbaceous perennial desert ephemerals from the Junggar Basin, China
Tang, An-jun1; Tian, Mei-hua2; Long, Chun-lin1,3
2009-09-01
发表期刊SEED SCIENCE RESEARCH
ISSN0960-2585
卷号19期号:3页码:183-189
摘要The purpose of our study was to better understand seed germination ecology of the spring ephemeral herbaceous perennials, Ixiolirion tataricum, Tulipa iliensis and Scorzonera pusilla, in the temperate desert in the Junggar Basin of northwestern China. Seeds of I. tataricum, T iliensis and S. pusilla were dormant at maturity but when subjected to cold, dry (2 months at 4 degrees C) followed by cold, wet (<= 40 days at 4 degrees C) conditions, they germinated to 100%, 96% and 93%, respectively. After 2 months' dry storage at 4 degrees C, seeds germinated to only 11%, 3% and 42%, respectively at 15 degrees C, and no seeds germinated at 30 degrees C. Seeds of the three species were not sensitive to light. Low (<12.7%) and high (21.4%) soil moisture contents suppressed germination. In addition, both final germination percentages and rates of the three species decreased dramatically with a decrease in water potential from 0 to -3.17 MPa. Thus, the low-temperature requirement for dormancy break and germination cues seed germination to occur in early spring when soil moisture is favourable for germination and subsequent seedling establishment.
关键词Afterripening Dormancy Germination Ixiolirion Tataricum Scorzonera Pusilla Tulipa Iliensis Water Stress
资助信息We thank Professor Yan Ping, Mr Zhai Wei and Ma Zhen (Shihezi University) for their help in the field. We received necessary assistance from He Huiying and Lan Qinying (Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences) for different aspects of this study. We are very grateful to Carol and Jerry Baskin (University of Kentucky, Lexington, Kentucky, USA) for their critical comments and editing the English. This study was supported financially by the Ministry of Education of China (B08044 & MUC 985-3-3), and the Ministry of Science and Technology of China (2005DKA21006).
收录类别SCI
语种英语
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/14067
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, Inst Tibet Plateau Res Kunming, Kunming 650204, Peoples R China
3.Minzu Univ China, Coll Life & Environm Sci, Beijing 100081, Peoples R China
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Tang, An-jun,Tian, Mei-hua,Long, Chun-lin. Seed dormancy and germination of three herbaceous perennial desert ephemerals from the Junggar Basin, China[J]. SEED SCIENCE RESEARCH,2009,19(3):183-189.
APA Tang, An-jun,Tian, Mei-hua,&Long, Chun-lin.(2009).Seed dormancy and germination of three herbaceous perennial desert ephemerals from the Junggar Basin, China.SEED SCIENCE RESEARCH,19(3),183-189.
MLA Tang, An-jun,et al."Seed dormancy and germination of three herbaceous perennial desert ephemerals from the Junggar Basin, China".SEED SCIENCE RESEARCH 19.3(2009):183-189.
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