持续高温下上海辰山植物园乔灌木热害表现与其生物学习性的关系

The Relationship between the Heat Damage of Trees and Shrubs and Its Biological Characteristics under Continuous High Temperature in Shanghai Chenshan Botanical Garden

摘要: 通过调查研究，将被调查植物在持续高温下的热害表现划分为六个等级。发现同一个物种会出现一至数个热害等级。二级热害症状是本次受热害种类和植株主要表现形式。生物学习性一定程度上决定着植物在持续高温胁迫下的受害程度。不同热害等级在具有不同生物学习性的种类中具有一定的相似性，但也存在着差异。落叶种类较常绿种类受热害更为严重；革质叶种类较非革质叶种类更耐持续高温。叶片相关的性状可以作为耐高温植物的引种和筛选的参考依据。

Abstract: Through investigation, the heat damage performance of plants under continuous high temperature was divided into six grades. The same species will have one to several heat damage grades. And the second grade of heat damage is the main form of expression. In some way, the degree of victimization of plants under continuous high temperature stress is determined by the biological characteristics. Different heat damage levels have some similarities in different types of biological characteristics, but there are certain differences. The deciduous species are more serious than those of evergreen species, and the type of leathery leaf is more resistant to continuous high tem-perature. The characteristics of leaves can be used as references for the introduction and selection of heat-resistant plants.