Variations in seasonal drought tolerance rankings

编号 040019003

推送时间 20190610

研究领域 森林培育 

年份 2019 

类型 期刊 

语种 英语

标题 Variations in seasonal drought tolerance rankings

来源期刊 trees

期 第190期

发表时间 20190405

关键词 Drought;  Drought tolerance;  Foliar dehydration;  Turgor loss point;  Acer; 

摘要 Drought is one of the most common and significant disorders affecting tree establishment and growth, in the urban environment. Consequently, improving tree selection by the provision of quantifiable tolerance data by which to evaluate genotypes is an important area of scientific research. A number of in vitro studies address drought tolerance in isolation, at a single time point during the growing season. Using an in vitro foliar dehydration method to evaluate closely related genotypes of Acer platanoides, A. pseudoplatanus and A. campestre, drought tolerance rankings were not found to be consistent throughout the growing season (spring, summer and autumn). i.e., A. pseudoplatanus ‘Negenia’ was found to be comparatively drought tolerant in spring, but displayed moderate to low comparative tolerance in summer and autumn;as measured using in vitro foliar dehydration as a proxy for drought tolerance. Drought conditions are most severe and common in summer;however, this study discusses the need to consider spring tolerance in addition to summer or autumn, particularly when selecting trees for tough urban sites, prone to drought stress across all three seasons.

服务人员 孙小满

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