Ji Kepeng, Wei Yaqing, Lan Guoyu
Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China.
College of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China.
Plants (Basel). 2024 Jun 5;13(11):1565. doi: 10.3390/plants13111565.
Microorganisms associated with plants play a crucial role in their growth, development, and overall health. However, much remains unclear regarding the relative significance of tree species identity and spatial variation in shaping the distribution of plant bacterial communities across large tropical regions, as well as how these communities respond to environmental changes. In this study, we aimed to elucidate the characteristics of bacterial community composition in association with two rare and endangered tropical tree species, and , across various geographical locations on Hainan Island. Our findings can be summarized as follows: (1) Significant differences existed in the bacterial composition between and , as observed in the diversity of bacterial populations within the root endosphere. Plant host-related variables, such as nitrogen content, emerged as key drivers influencing leaf bacterial community compositions, underscoring the substantial impact of plant identity on bacterial composition. (2) Environmental factors associated with geographical locations, including temperature and soil pH, predominantly drove changes in both leaf and root-associated bacterial community compositions. These findings underscored the influence of geographical locations on shaping plant-associated bacterial communities. (3) Further analysis revealed that geographical locations exerted a greater influence than tree species identity on bacterial community compositions and diversity. Overall, our study underscores that environmental variables tied to geographical location primarily dictate changes in plant bacterial community composition. These insights contribute to our understanding of microbial biogeography in tropical regions and carry significant implications for the conservation of rare and endangered tropical trees.
与植物相关的微生物在其生长、发育和整体健康中起着至关重要的作用。然而，关于树种身份和空间变异在塑造大型热带地区植物细菌群落分布方面的相对重要性，以及这些群落如何应对环境变化，仍有许多尚不清楚。在本研究中，我们旨在阐明与海南岛上两个珍稀濒危热带树种[具体树种1]和[具体树种2]相关的细菌群落组成特征。我们的研究结果总结如下：（1）[具体树种1]和[具体树种2]的细菌组成存在显著差异，如在根内圈细菌种群多样性中所观察到的那样。植物宿主相关变量，如氮含量，成为影响叶片细菌群落组成的关键驱动因素，突显了植物身份对细菌组成的重大影响。（2）与地理位置相关的环境因素，包括温度和土壤pH值，主要驱动了叶片和根系相关细菌群落组成的变化。这些发现强调了地理位置对塑造植物相关细菌群落的影响。（3）进一步分析表明，地理位置对细菌群落组成和多样性的影响大于树种身份。总体而言，我们的研究强调与地理位置相关的环境变量主要决定了植物细菌群落组成的变化。这些见解有助于我们理解热带地区的微生物生物地理学，并对珍稀濒危热带树木的保护具有重要意义。
