Ecological role of physical dormancy in seeds of Oxytropis racemosa in a semiarid sandland with unpredictable rainfall
文献类型：期刊论文
| 作者 | Hu, Dandan1; Baskin, Jerry M.; Baskin, Carol C.; Yang, Xuejun; Huang, Zhenying
|
| 刊名 | JOURNAL OF PLANT ECOLOGY
 |
| 出版日期 | 2018 |
| 卷号 | 11期号:4页码:542-552 |
| 关键词 | Oxytropis racemosa physical dormancy seedling emergence soil moisture soil seed bank soil temperature unpredictable rainfall |
| ISSN号 | 1752-9921 |
| DOI | 10.1093/jpe/rtx063 |
| 文献子类 | Article |
| 英文摘要 | Aims Seed dormancy and the soil seed bank are crucial to plant regeneration strategy, especially in semiarid ecosystems with unpredictable precipitation. The aim of this study was to investigate how seed dormancy is controlled by environmental factors and how it is correlated with the soil seed bank and regeneration of the perennial legume Oxytropis racemosa, a dominant perennial herb in Mu Us Sandland of semiarid China. Methods Germination and imbibition experiments on fresh intact and scarified seeds of O. racemosa were used to identify physical dormancy (PY) in seeds of this species. Soil seed bank dynamics, timing of seedling emergence and the fate of buried seeds in the natural habitat were investigated. Important Findings PY was broken by mechanical scarification or wet heat/ice water cycles but not solely by dry heat or wet heat treatment. The soil seed bank exhibited seasonal changes in the number of seeds, which was highest in September and lowest in July. Seeds buried at different sand depths gradually lost dormancy; 20-42% of the seeds remained dormant after 20 months of burial. Dormancy break occurs gradually throughout the year. Our results indicate that O. racemosa exhibits hardcoatedness heterogeneity that spreads germination of a seed cohort between seasons and years in the semiarid environment, where the amount of precipitation during the growing season is highly variable. |
| 学科主题 | Plant Sciences ; Ecology ; Forestry |
| 出版地 | OXFORD |
| 电子版国际标准刊号 | 1752-993X |
| WOS关键词 | 1ST REPORT ; WATER-GAP ; GERMINATION ; BANKS ; REQUIREMENTS ; BREAKING ; FIRE ; SAPINDACEAE ; POPULATIONS ; PERSISTENCE |
| 语种 | 英语 |
| WOS记录号 | WOS:000433291100004 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | Key Basic Research and Development Plan of P. R. China [2016YFC050080502] ; National Natural Science Foundation of P. R. ChinaNational Natural Science Foundation of China (NSFC) [31370705, 31570416] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/20499]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 2.Baskin, Carol C.] Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA 3.Baskin, Jerry M.; Baskin, Carol C.] Univ Kentucky, Dept Biol, Lexington, KY 40506 USA 4.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Dandan,Baskin, Jerry M.,Baskin, Carol C.,et al. Ecological role of physical dormancy in seeds of Oxytropis racemosa in a semiarid sandland with unpredictable rainfall[J]. JOURNAL OF PLANT ECOLOGY,2018,11(4):542-552. |
| APA | Hu, Dandan,Baskin, Jerry M.,Baskin, Carol C.,Yang, Xuejun,&Huang, Zhenying.(2018).Ecological role of physical dormancy in seeds of Oxytropis racemosa in a semiarid sandland with unpredictable rainfall.JOURNAL OF PLANT ECOLOGY,11(4),542-552. |
| MLA | Hu, Dandan,et al."Ecological role of physical dormancy in seeds of Oxytropis racemosa in a semiarid sandland with unpredictable rainfall".JOURNAL OF PLANT ECOLOGY 11.4(2018):542-552. |
入库方式： OAI收割
来源：植物研究所
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