Subjects: Biology >> Botany >> Applied botany submitted time 2021-04-13 Cooperative journals: 《广西植物》
Abstract： The research on the adaptabilities of invasive plants to their growing environments is the base to explore their invasiveness. The tropical coral islands of the Paracel Islands have the harsh environmental conditions of high salt and alkali soil, high temperature, strong sunlight, and drought. In recent years, the invasion of Chromolaena odorata occurred in some native plant communities on the Paracel Islands, which may cause serious harm to its fragile forest ecosystem. In order to understand the ecophysiological adaptabilities of C. odorata to the tropical coral islands, we investigated the morphological, physiological characteristics and the nutrient contents in the leaves of C. odorata growing in the suburbs of Wenchang City and forest gaps on the Paracel Islands. The results showed that the plants of C. odorata growing in the Paracel Islands had thicker leaves, lower stomatal density, lower chlorophyll-a and malondialdehyde contents, higher level of superoxide dismutase (SOD) and catalase (CAT) activities than that growing in Wenchang City, which are beneficial to acclimate to the adverse environments of strong light and seasonal drought, and may cause greater invasiveness of the plants. Therefore, it is necessary to strengthen the monitoring and control of C. odorata during the process of protection and restoration on the vegetation of the tropical coral islands.
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