Dormancy-Related Seed Positional Effect in Two Populations of an Annual Grass from Locations of Contrasting Aridity
文献类型：期刊论文
| 作者 | Volis, Sergei |
| 刊名 | PLOS ONE
 |
| 出版日期 | 2014-03-27 |
| 卷号 | 9期号:3页码:e93061 |
| 关键词 | OATS AVENA-FATUA VARIABLE ENVIRONMENTS PURE LINES DESERT GERMINATION DEMOGRAPHY CONSEQUENCES TEMPERATURE DYNAMICS BANKING |
| ISSN号 | 1932-6203 |
| 通讯作者 | Volis, S (reprint author), Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Div & Biogeog East Asia, Kunming, Peoples R China. ; volis@mail.kib.ac.cn |
| 英文摘要 | In grasses, variation in seed size and dormancy often results from a seed's position within a dispersal unit. In this paper, I asked whether seed positional effect within a spikelet contributes to ecotypic differentiation between two populations of Avena sterilis having different species range position and associated aridity. I created experimental seed banks in which germination of seeds (florets) having different positions within a spikelet was examined over three years. In addition, two germination tests were conducted under controlled conditions. The two populations were found to have a short-living soil seed bank due to sequential germination of the florets. Although positional seed dormancy effect in A. sterilis does not appear to be a specific desert adaptation against unpredictability of rainfall events, this trait does contribute to ecotypic differentiation between desert and Mediterranean populations. Consistent with bet hedging buffering against rainfall unpredictability, germination fractions in the first year were higher in the Mediterranean than in the desert population, while seeds of the desert origin had stronger dormancy and more sequential germination of florets. |
| 学科主题 | Multidisciplinary Sciences |
| 类目[WOS] | Multidisciplinary Sciences |
| 研究领域[WOS] | Science & Technology - Other Topics |
| 关键词[WOS] | OATS AVENA-FATUA ; VARIABLE ENVIRONMENTS ; PURE LINES ; DESERT ; GERMINATION ; DEMOGRAPHY ; CONSEQUENCES ; TEMPERATURE ; DYNAMICS ; BANKING |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000333677500068 |
| 公开日期 | 2014-05-16 |
| 源URL | [http://ir.kib.ac.cn/handle/151853/18061]  |
| 专题 | 昆明植物研究所_资源植物与生物技术所级重点实验室 |
| 作者单位 | Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Div & Biogeog East Asia, Kunming, Peoples R China |
| 推荐引用方式 GB/T 7714 | Volis, Sergei. Dormancy-Related Seed Positional Effect in Two Populations of an Annual Grass from Locations of Contrasting Aridity[J]. PLOS ONE,2014,9(3):e93061. |
| APA | Volis, Sergei.(2014).Dormancy-Related Seed Positional Effect in Two Populations of an Annual Grass from Locations of Contrasting Aridity.PLOS ONE,9(3),e93061. |
| MLA | Volis, Sergei."Dormancy-Related Seed Positional Effect in Two Populations of an Annual Grass from Locations of Contrasting Aridity".PLOS ONE 9.3(2014):e93061. |
入库方式： OAI收割
来源：昆明植物研究所
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