Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1093/aobpla/plx003 |
Seed dormancy-breaking in a cold desert shrub in relation to sand temperature and moisture | |
Liu, Huiliang1,2; Abudureheman, Buhailiqiemu1,3; Zhang, Lingwei4; Baskin, Jerry M.5; Baskin, Carol C.5,6; Zhang, Daoyuan1,2 | |
通讯作者 | Zhang, Daoyuan |
来源期刊 | AOB PLANTS |
ISSN | 2041-2851 |
出版年 | 2017 |
卷号 | 9 |
英文摘要 | Seasonal periodicity of seed germination and its relationship to seasonal changes in temperature and soil moisture have been well studied in seeds of species with physiological dormancy. However, relatively little information is available on the role of these environmental factors in controlling germination of seeds with physical dormancy (PY). Our primary aim was to determine if seeds of the cold desert sand dune semi-shrub Eremosparton songoricum exhibits seasonal periodicity of seed germination and the relationship between seed dormancy break and soil temperature and moisture. In the laboratory, seeds incubated on dry, wet, wet-dry and dry-wet sand were exposed to a 1-year sequence of temperature regimes simulating those in the field. In the field, seeds were buried at different depths on a sand dune, and germination of periodically exhumed seeds was tested at five temperature regimes during a 2-year period. In the 1-year sequence of simulated natural temperature regimes, breaking of PY was more effective under constantly wet than under constantly dry conditions, and germination percentage was significantly higher under dry-wet than under wet-dry conditions. Seeds buried in the field exhibited a distinct peak of germination in spring and little or no germination in other seasons. The final (2-year) monthly cumulative germination percentage differed among burial depths and temperature, and it was highest (47 %) in seeds buried at 3 cm and tested at 25/10 degrees C. A seed cohort of E. songoricum likely exhibits a long-term annual periodicity of spring germination in the field, and dormancy break appears to be driven by low (winter) temperatures and relatively high sand moisture content. To our knowledge this is the first study to document seasonal periodicity in seed germination in a cold desert species with PY and to identify the mechanism (at the whole-seed level) of its occurrence. |
英文关键词 | Burial depth Eremosparton songoricum Fabaceae physical dormancy seed germination phenology wet-dry cycles |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000407375600001 |
WOS关键词 | EREMOSPARTON-SONGORICUM FABACEAE ; PHYSICAL DORMANCY ; TRIFOLIUM-SUBTERRANEUM ; ANNUAL MEDICS ; WET HEAT ; RELEASE ; GERMINATION ; BURIAL ; HARDSEEDEDNESS ; POPULATIONS |
WOS类目 | Plant Sciences ; Ecology |
WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology |
来源机构 | 中国科学院新疆生态与地理研究所 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/197361 |
作者单位 | 1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi 830011, Peoples R China; 2.Chinese Acad Sci, Turpan Eremophytes Bot Garden, Turpan 838008, Peoples R China; 3.Xinjiang Inst Sci & Technol, Aksu Campus, Aksu 843000, Peoples R China; 4.Xinjiang Agr Univ, Coll Grassland & Environm Sci, Xinjiang Key Lab Soil & Plant Ecol Proc, Urumqi 830052, Peoples R China; 5.Univ Kentucky, Dept Biol, Lexington, KY 40506 USA; 6.Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA |
推荐引用方式 GB/T 7714 | Liu, Huiliang,Abudureheman, Buhailiqiemu,Zhang, Lingwei,et al. Seed dormancy-breaking in a cold desert shrub in relation to sand temperature and moisture[J]. 中国科学院新疆生态与地理研究所,2017,9. |
APA | Liu, Huiliang,Abudureheman, Buhailiqiemu,Zhang, Lingwei,Baskin, Jerry M.,Baskin, Carol C.,&Zhang, Daoyuan.(2017).Seed dormancy-breaking in a cold desert shrub in relation to sand temperature and moisture.AOB PLANTS,9. |
MLA | Liu, Huiliang,et al."Seed dormancy-breaking in a cold desert shrub in relation to sand temperature and moisture".AOB PLANTS 9(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。