Biogeographic divergence in leaf traits of Sapindus mukorossi and Sapindus delavayi and its relation to climate

• 作者: Xin Wang Jiming Liu Xue Rui Yuanyuan Xu Guochun Zhao Lixian Wang Xuehuang Weng Zhong Chen Liming Jia
• 来源期刊: 林业研究（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: ORIGINAL PAPERS
• 页码范围: 1445-1456
• 页数: 12页
• 语种: 英文

摘要

To explore differences in leaf morphology between Sapindus mukorossi and Sapindus delavayi , and how the environment might drive these differences, 80 germplasm samples from the Sapindus germplasm nursery in Fujian Province were selected. The study revealed a wide variation and diversity in 16 germplasm traits, both within and between species grown under the same conditions. On average, the relative contribution of intraspecific variabil-ity to total variability was more important (83％) than the relative contribution of interspecific variability (17％). PER-MANOVA analysis showed differences in leaflet thickness, length, perimeter, length to width ratio, and leaf hairs or trichome density. Correlation analyses between leaf mor-phological traits and environmental variables indicated that leaves tended to be larger, longer, and thicker in wetter, warmer, and low-altitude conditions. Our analysis of the relationship between climate and leaf morphology revealed that S. mukorossi had a greater sensitivity to climate vari-ation, particularly in response to mean temperatures of the coldest and warmest seasons, which led to differences in leaf traits and the distribution of the two species. These findings contribute to the understanding of leaf morphology varia-tions in S. mukorossi and S. delavayi, and provide a basis for the collection of Sapindus germplasm resources, their cultivation and use to help address climate change.