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HOME > J. Microbiol > Volume 48(2); 2010 > Article
Research Support, Non-U.S. Gov't
Microbial Community on Healthy and Diseased Leaves of an Invasive Plant Eupatorium adenophorum in Southwest China
Zhen-Xin Zhou 1,2, Huan Jiang 1,2, Chen Yang 1,2, Ming-Zhi Yang 2, Han-Bo Zhang 1,2
Journal of Microbiology 2010;48(2):139-145.
DOI: https://doi.org/10.1007/s12275-010-9185-y
Published online: May 1, 2010
1Laboratory of Conservation and Utilization for Bio-resources and Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, Kunming 650091, P. R. China, 2School of Life Science, Yunnan University, Kunming 650091, P. R. China1Laboratory of Conservation and Utilization for Bio-resources and Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, Kunming 650091, P. R. China, 2School of Life Science, Yunnan University, Kunming 650091, P. R. China
Corresponding author:  Han-Bo Zhang , Tel: +86-871-503-4282, 
Received: 12 June 2009   • Accepted: 6 September 2009
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Abstract

Invasive plants have caused great economic losses and environmental problems worldwide. Eupatorium adenophorum is one of the most invasive weeds in China. To better understand its invasive mechanisms, in the present paper, the microbial communities of healthy and diseased leaves of E. adenophorum were obtained using both culture-independent and -dependent methods and their diversities were compared. The bacteria obtained from culture-independent method belong to Proteobacteria (95.8%), Actinobacteria (2.1%), and Firmicutes (2.1%) and fungi belong to Ascomycota (65.2%) and Basidiomycota (34.8%). Very few overlapped microbial species were found by culture-dependent and -independent methods. Healthy leaves display higher bacterial diversity than diseased leaves. Phylogenetic structures are very different between healthy and diseased phyllosphere microbial communities. Bacteria close to Acinetobacter and Pseudomonas were dominant on healthy leaves, whereas those close to Shigella were dominant on diseased leaves. 52.9% of fungal clones from healthy leaves were Ustilaginomycetes, close to Rhodotorula phylloplana and uncultured basidomycete; by contrast, 60% of clones from diseased leaves were Lecanoromycetes, close to Umbilicaria muehlenbergii. No bacteria but four fungal strains phylogenetically close to Myrothecium sp. and Alternaria alternate were pathogenic to seedlings and detached leaves of the invasive plant. Therefore, this plant may be resistant to pathogens from bacteria but not fungi in its introduced range.

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    Microbial Community on Healthy and Diseased Leaves of an Invasive Plant Eupatorium adenophorum in Southwest China
    J. Microbiol. 2010;48(2):139-145.   Published online May 1, 2010
    DOI: https://doi.org/10.1007/s12275-010-9185-y
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