The impact of the endophytic bacterial community on mulberry tree growth in the Three Gorges Reservoir ecosystem,China |
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| Authors: | Jie Xie Weifang Xu Meng Zhang Changyu Qiu Jia Liu Michael Wisniewski Ting Ou Zeyang Zhou Zhonghuai Xiang |
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| Affiliation: | 1. State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding in Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing, 400715 China;2. State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding in Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing, 400715 China These authors contributed equally to this work.;3. Promotion Station of Sericulture Technology, Guangxi Zhuang Autonomous Region, 530007 China;4. Chongqing Key Laboratory of Economic Plant Biotechnology, College of Landscape Architecture and Life Science/Institute of Special Plants, Chongqing University of Arts and Sciences, Chongqing, 402160 China;5. Department of Biological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061 USA |
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| Abstract: | Plant-associated microbes influence plant performance and may also impact biotic and abiotic stress tolerance. The microbiome of mulberry trees planted for ecological restoration in the hydro-fluctuation belt of the Three Gorges Reservoir Region, China, exhibited distinct patterns of localization. The endosphere exhibited lower α-diversity relative to the rhizosphere, but was more closely related to host growth status, especially in stem tissues. Pantoea was the predominant bacterial genus inhabiting the stems of two well-growing plants, while sequences identified as Pseudomonas and Pantoea were abundant in poorly growing plants. The complexity of the endophytic community was more connected to growth status in well-growing plants than it was in poorly growing plants. Among 151 endophytes cultured from collected samples of mulberry, 64 exhibited plant growth-promoting (PGP) potential in vitro and the majority of beneficial taxa were harvested from well-growing plants. Collectively, the present study indicates that the recruitment of beneficial endophytes may contribute to mulberry fitness under abiotic stress, and it provides a foundation for the development of a new strategy in vegetation restoration. |
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