Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 9318433 |
| Effect of a Seed Bank on the Evolution of Post-Germination Traits: An Empircal Study of the Desert Mustard Lesquerella fendleri | |
| Ann Evans | |
| 主持机构 | University of New Mexico |
| 开始日期 | 1994-07-01 |
| 结束日期 | 2000-06-30 |
| 资助经费 | 390704(USD) |
| 项目类别 | Continuing Grant |
| 资助机构 | US-NSF（美国国家科学基金会） |
| 项目所属计划 | POPULATION DYNAMICS |
| 语种 | 英语 |
| 国家 | 美国 |
| 英文简介 | Evans 9318433 Many organisms, when faced with unfavorable environmental conditions, respond by slowing or arresting growth and development. At one end of the scale, animals such as bears have the ability to slow metabolism by hibernating. At the other end of the spectrum, many higher plants have the ability to more or less arrest growth and development of seeds until favorable conditions are experienced. This dormancy of seeds has led to the existence of seed banks--populations of dormant, viable seeds in the soil. Despite the profound implications for the ecology and evolution of plants, virtually no information is available on how dormancy affects other traits. Two experiments will address this question in the short-lived perennial desert mustard Lesquerella fendleri. The first explores whether past evolution has led to adaptive syndromes of germination requirements and post- germination traits. The second asks how evolution could act by performing an artificial selection experiment. This work has applied value in several regards. Efforts to understand plant responses to environmental change will remain incomplete (and perhaps erroneous) until we understand the important, but neglected, seed stage of the life cycle. Knowledge of the seed stage is also critical for plans to revegetate human- impacted lands. |
| 来源学科分类 | Biological Sciences |
| URL | https://www.nsf.gov/awardsearch/showAward?AWD_ID=9318433 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/341059 |
| 推荐引用方式 GB/T 7714 | Ann Evans.Effect of a Seed Bank on the Evolution of Post-Germination Traits: An Empircal Study of the Desert Mustard Lesquerella fendleri.1994. |
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