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题名: Seed dormancy and germination of three herbaceous perennial desert ephemerals from the Junggar Basin, China
作者: Tang, An-jun1; Tian, Mei-hua2; Long, Chun-lin1, 3
刊名: SEED SCIENCE RESEARCH
关键词: afterripening ; dormancy ; germination ; Ixiolirion tataricum ; Scorzonera pusilla ; Tulipa iliensis ; water stress
英文摘要: 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.
出版日期: 2009-09-01
卷号: 19, 期号:3, 页码:183-189
DOI标识: 10.1017/S096025850999002X
语种: 英语
收录类别: SCI
学科分类: Plant Sciences
ISSN号: 0960-2585
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/14067
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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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

Recommended Citation:
Tang, AJ; Tian, MH; Long, CL.Seed dormancy and germination of three herbaceous perennial desert ephemerals from the Junggar Basin, China,SEED SCIENCE RESEARCH,2009,19(3):183-189
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