Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 9224259 |
| Doctoral Dissertation: Limitation of Transpiration by XylemCavitation and Hydraulic Conductance in Riparian and Non-riparian Woody Vegetation of the Sonoran Desert | |
| [unavailable] | |
| 主持机构 | University of Utah |
| 开始日期 | 1993-04-01 |
| 结束日期 | 1996-09-30 |
| 资助经费 | 14118(USD) |
| 项目类别 | Standard Grant |
| 资助机构 | US-NSF（美国国家科学基金会） |
| 语种 | 英语 |
| 国家 | 美国 |
| 英文简介 | This project examines how desert plants avoid exceeding the limits of their water transport system. Water is lost by evaporation when plants capture carbon dioxide from the atmosphere during photosynthesis. To support continued growth, such losses must be replenished by water pulled from the soil via the roots to the leaves in a manner not unlike drinking from a straw. If the suction driving water movement becomes to great, as can happen when the evaporation rate from leaves is too high or the soil is too dry, the plant's water transport system can become non-functional. This condition, known as cavitation, results from the entry of air into the vascular system producing an air embolism and interrupting the movement of water. The limits of the water transport system, and hence the plants maximum drought tolerance, are determined by the structure of its component conduits. The proposed research will determine the limits on water transport in plants from habitats with different patterns of water availability. The ability of each species to maintain water transport by remaining within the limits of its vascular system or controlling the loss of vascular function under harsh conditions will be evaluated. The results will advance our understanding of whole plant responses to water stress. |
| 来源学科分类 | Biological Sciences |
| URL | https://www.nsf.gov/awardsearch/showAward?AWD_ID=9224259 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/341038 |
| 推荐引用方式 GB/T 7714 | [unavailable].Doctoral Dissertation: Limitation of Transpiration by XylemCavitation and Hydraulic Conductance in Riparian and Non-riparian Woody Vegetation of the Sonoran Desert.1993. |
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