Interactions between bacteria and fungi in macrophyte leaf litter decomposition
Interactions between bacteria and fungi in macrophyte leaf litter decomposition
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大型植物落叶分解中细菌和真菌之间的相互作用
DOI：
10.1111/1462-2920.15261
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发表时间：
--
影响因子：
5.1
通讯作者：
Wu Qinglong L.
中科院分区：
文献类型：
--
作者：
Zhao Biying;Xing Peng;Wu Qinglong L.
微生物在浅水湖泊水生植物的分解过程中起着重要作用，细菌-真菌相互作用对水生植物的分解过程有很大的影响。在本研究中，在5、15和25 °C的温度下，分析了参与分解三种水生植物--菰、黑藻和菜叶凋落物的微生物。结果表明，温度对分解速率有影响。细菌α多样性沿着显著增加，温度和植物种类对细菌群落有显著影响，植物种类是真菌群落最重要的驱动因子。在所调查的生态网络中，世界性的细菌类群（γ-变形菌纲、拟杆菌纲、δ-变形菌纲、厚壁菌纲和螺旋菌纲）是关键种，根据不同的水生植物种类，它们与担子菌门和子囊菌门表现出显著的共现或共排除关系。本研究表明，参与植物凋落物分解的细菌对温度变化更为敏感，真菌对植物材料的组成具有较高的特异性。黑藻的养分含量促进了细菌-真菌的正相互作用，从而加速了凋落叶的分解和再循环。
Microbes play an important role in decomposition of macrophytes in shallow lakes, and the process can be greatly affected by bacteria–fungi interactions in response to material composition and environmental conditions. In this study, microbes involved in the decomposition of leaf litter from three macrophyte species,Zizania latifolia,Hydrilla verticillataandNymphoides peltata, were analysed at temperatures of 5, 15 and 25 °C. Results indicate that the decomposition rate was affected by temperature. Bacterial alpha diversity increased significantly along the time, while both temperature and plant species had a significant impact on the bacterial community, and plant type was shown to be the most important driving factor for the fungal community. The cosmopolitan bacterial taxa affiliated withGammaproteobacteria,Bacteroidetes,Deltaproteobacteria,FirmicutesandSpirochaeteswere key species in the investigated ecological networks, demonstrating significant co‐occurrence or co‐exclusion relationships withBasidiomycotaandAscomycota, according to different macrophyte species. This study indicates that bacteria involved in the decomposition of macrophyte leaf litter are more sensitive to temperature variance, and that fungi have a higher specificity to the composition of plant materials. The nutrient content ofHydrilla verticillatapromoted a positive bacteria–fungi interaction, thereby accelerating the decomposition and re‐circulation of leaf litter.