Dissertation Research: Variation in Vulnerability to Cavitation in Quercus douglasii

论文研究：道格拉斯栎空蚀脆弱性的变化

• 批准号: 9520679
• 负责人: James Richards
• 金额: $ 0.82万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-08-15 至 1997-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9520679&HistoricalAwards=false
• 关键词: Dissertation; Research; Variation; Vulnerability; Cavitation

9520679 The blue oak is a keystone species in a water limiting environment, and over much of its range in California, this tree is not regenerating. This research is aimed at understanding the role that water relations play in determining the success of this tree. The research will compare vulnerability to drought-induced cavitation in oaks of different ages. It will determine the amount of genetic variation that exists in this trait, by comparing responses of seedlings produced by different parent trees. Finally, it will ascertain the importance of phenotypic plasticity in modifying response to different levels of moisture stress. The research will increase understanding of the mechanisms and variability of response to drought induced cavitation in woody plants. Understanding of the phenotypic expression of water-use traits, and knowledge of variation on temporal and spatial scales should be of considerable value in developing management plans for the conservation of an ecologically important species.

9520679蓝橡树是水限制环境中的关键物种，在加州的大部分范围内，这种树都没有再生。 这项研究旨在了解水的作用， 发挥 决定这棵树的成功 这项研究将比较不同年龄的橡树对干旱引起的空化的脆弱性。 它将通过比较不同亲本树木产生的幼苗的反应来确定存在于该性状中的遗传变异的量。 最后，它将确定表型可塑性的重要性，在修改响应不同程度的水分胁迫。 该研究将有助于加深对木本植物干旱空化效应的机理和变异性的认识。 了解水利用性状的表型表达，以及时间和空间尺度上的变化知识，对于制定保护具有生态重要性的物种的管理计划应具有相当大的价值。