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Plant species shape the bacterial communities on the phyllosphere in a hyper-arid desert.

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Title: Plant species shape the bacterial communities on the phyllosphere in a hyper-arid desert.
Authors: Liu, Jiaqiang1 (AUTHOR) 18790522863@163.com, Sun, Xiang1 (AUTHOR) sunx@hbu.edu.cn, Zuo, Yiling1 (AUTHOR) zuoyiling@foxmail.com, Hu, Qiannan1 (AUTHOR) amyhqn@163.com, He, Xueli1 (AUTHOR) xlh3615@126.com
Source: Microbiological Research. Apr2023, Vol. 269, pN.PAG-N.PAG. 1p.
Subjects: Bacterial communities, Plant species, Bacterial diversity, Biotic communities, Deserts, Microbial communities
Geographic Terms: Gansu Sheng (China)
Abstract: Microorganisms are an important component of global biodiversity. However, they are vulnerable to hyper-arid climates in desert regions. Xerophytes are desert vegetation with unique biodiversity. However, little is known about the identities and communities of phyllosphere epiphytic microorganisms inhabiting the xerophyte leaf surface in the hot and dry environment. The diversity and community composition of phyllosphere epiphytes on different desert plants in Gansu, China, was investigated using the next-generation sequencing technique, revealing the diversity and community composition of the phyllosphere epiphytic bacteria associated with desert xerophytes. In addition, the ecological functions of the bacterial communities were investigated by combining the sequence classification information and prokaryotic taxonomic function annotation (FAPROTAX). This study determined the phyllosphere bacterial community composition, microbial interactions, and their functions. Despite harsh environments in the arid desert, we found that there are still diverse epiphytic bacteria on the leaves of desert plants. The bacterial communities mainly included Actinobacteria (52.79%), Firmicutes (31.62%), and Proteobacteria (12.20%). Further comparisons revealed different microbial communities, including Firmicutes at the phylum and Paenibacillaceae at the family level, in the phyllosphere among different plants, suggesting that the host plants had strong filter effects on bacteria. Co-occurrence network analysis revealed positive relationships were dominant among different bacterial taxa. The abundance of Actinobacteria and Proteobacteria was positively correlated, demonstrating their mutual relationship. On the other hand, the abundance of Firmicutes was negatively correlated, which suggested that they inhibit the growth of other bacterial taxa. FAPROTAX prediction revealed that chemoheterotrophy (accounting for 39.02% of the community) and aerobic chemoheterotrophy (37.01%) were the main functions of the leaf epiphytic bacteria on desert plants. This study improves our understanding of the community composition and ecological functions of plant-associated microbial communities inhabiting scattered niches in the desert ecosystem. In addition, the study provides insight into the biodiversity assessment in the desert region. • Bacterial communities colonize the phyllosphere in the hyper-arid desert. • Plant species shape the phyllosphere bacterial communities. • Syntrophy is the primary survival strategy of bacteria in desert plant phyllosphere • Phyllospheric bacterial communities participate in the cycle of chemical elements in the ecosystem. [ABSTRACT FROM AUTHOR]
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Abstract:Microorganisms are an important component of global biodiversity. However, they are vulnerable to hyper-arid climates in desert regions. Xerophytes are desert vegetation with unique biodiversity. However, little is known about the identities and communities of phyllosphere epiphytic microorganisms inhabiting the xerophyte leaf surface in the hot and dry environment. The diversity and community composition of phyllosphere epiphytes on different desert plants in Gansu, China, was investigated using the next-generation sequencing technique, revealing the diversity and community composition of the phyllosphere epiphytic bacteria associated with desert xerophytes. In addition, the ecological functions of the bacterial communities were investigated by combining the sequence classification information and prokaryotic taxonomic function annotation (FAPROTAX). This study determined the phyllosphere bacterial community composition, microbial interactions, and their functions. Despite harsh environments in the arid desert, we found that there are still diverse epiphytic bacteria on the leaves of desert plants. The bacterial communities mainly included Actinobacteria (52.79%), Firmicutes (31.62%), and Proteobacteria (12.20%). Further comparisons revealed different microbial communities, including Firmicutes at the phylum and Paenibacillaceae at the family level, in the phyllosphere among different plants, suggesting that the host plants had strong filter effects on bacteria. Co-occurrence network analysis revealed positive relationships were dominant among different bacterial taxa. The abundance of Actinobacteria and Proteobacteria was positively correlated, demonstrating their mutual relationship. On the other hand, the abundance of Firmicutes was negatively correlated, which suggested that they inhibit the growth of other bacterial taxa. FAPROTAX prediction revealed that chemoheterotrophy (accounting for 39.02% of the community) and aerobic chemoheterotrophy (37.01%) were the main functions of the leaf epiphytic bacteria on desert plants. This study improves our understanding of the community composition and ecological functions of plant-associated microbial communities inhabiting scattered niches in the desert ecosystem. In addition, the study provides insight into the biodiversity assessment in the desert region. • Bacterial communities colonize the phyllosphere in the hyper-arid desert. • Plant species shape the phyllosphere bacterial communities. • Syntrophy is the primary survival strategy of bacteria in desert plant phyllosphere • Phyllospheric bacterial communities participate in the cycle of chemical elements in the ecosystem. [ABSTRACT FROM AUTHOR]
ISSN:09445013
DOI:10.1016/j.micres.2023.127314