Yang Hao, Zheng Yong, Yang Zhijie, Wang Quan-Cheng, Lü Peng-Peng, Hu Hang-Wei, Yang Yusheng, He Ji-Zheng
Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou 350007, China.
Fujian Sanming Forest Ecosystem National Observation and Research Station, Fujian Normal University, Sanming 365002, China.
FEMS Microbiol Ecol. 2023 Mar 23;99(4). doi: 10.1093/femsec/fiad033.
Deciphering the local diversity and community composition of plant-associated microorganisms is crucial to predict their ecological functions in forest ecosystems. The differences in microbial diversity and community composition between the aboveground and belowground tree compartments remain largely unknown. Here, we examined bacterial communities in the leaf surface (phyllosphere) and root-associated (root and rhizospheric soil) habitats of 13 tree species. Bacterial richness substantially differed across the three compartments, with the highest value observed in rhizospheric soil. Tree species exerted a significant effect on α-diversity of leaf- and soil- but not root-inhabiting bacteria. Bacterial communities were distinct across habitats and were significantly more divergent in leaf- than in root-associated habitats. Leaf nutrients and soil pH and NH4+-N were the main factors regulating leaf- and root-related community composition, respectively. This study highlights that host selection effects on bacterial community structure were more prominent in aboveground than in belowground habitats. Our findings contribute to a better understanding of the effect of compartments and subtropical tree species on microbial diversity, with crucial implications for sustainable forest plantation management.
解读与植物相关的微生物的局部多样性和群落组成对于预测它们在森林生态系统中的生态功能至关重要。地上和地下树木部分之间微生物多样性和群落组成的差异在很大程度上仍然未知。在这里，我们研究了13种树种的叶表面（叶际）和根相关（根和根际土壤）生境中的细菌群落。细菌丰富度在这三个部分之间有很大差异，在根际土壤中观察到的值最高。树种对叶和土壤中栖息的细菌的α多样性有显著影响，但对根中栖息的细菌没有影响。细菌群落在不同生境中是不同的，并且在叶相关生境中比在根相关生境中差异显著更大。叶片养分、土壤pH值和NH4+-N分别是调节叶和根相关群落组成的主要因素。这项研究强调，宿主选择对细菌群落结构的影响在地上生境中比在地下生境中更突出。我们的研究结果有助于更好地理解部分和亚热带树种对微生物多样性的影响，对可持续森林种植管理具有关键意义。
