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  Species Richness, rRNA Gene Abundance, and Seasonal Dynamics of Airborne Plant-Pathogenic Oomycetes

Lang-Yona, N., Pickersgill, D. A., Marus, I., Teschner, D., Wehking, J., Thines, E., et al. (2018). Species Richness, rRNA Gene Abundance, and Seasonal Dynamics of Airborne Plant-Pathogenic Oomycetes. Frontiers in Microbiology, 9: 2673. doi:10.3389/fmicb.2018.02673.

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Lang-Yona, Naama1, Author              
Pickersgill, Daniel A.1, Author              
Marus, Isabell1, Author              
Teschner, David1, Author              
Wehking, Jörn1, Author              
Thines, Eckhard2, Author
Pöschl, Ulrich1, Author              
Despres, Viviane R.2, Author
Fröhlich-Nowoisky, Janine1, Author              
Affiliations:
1Multiphase Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826290              
2external, ou_persistent22              

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 Abstract: Oomycetes, also named Peronosporomycetes, are one of the most important and widespread groups of plant pathogens, leading to significant losses in the global agricultural productivity. They have been studied extensively in ground water, soil, and host plants, but their atmospheric transport vector is not well characterized. In this study, the occurrence of airborne Oomycetes was investigated by Sanger sequencing and quantitative PCR of coarse and fine aerosol particle samples (57 filter pairs) collected over a 1-year period (2006–2007) and full seasonal cycle in Mainz, Germany. In coarse particulate matter, we found 55 different hypothetical species (OTUs), of which 54 were plant pathogens and 29 belonged to the genus Peronospora (downy mildews). In fine particulate matter (<3 μm), only one species of Hyaloperonospora was found in one sample. Principal coordinate analysis of the species composition revealed three community clusters with a dependence on ambient temperature. The abundance of Oomycetes rRNA genes was low in winter and enhanced during spring, summer, and fall, with a dominance of Phytophthora, reaching a maximum concentration of ∼1.6 × 106 rRNA genes per cubic meter of sampled air in summer. The presence and high concentration of rRNA genes in air suggests that atmospheric transport, which can lead to secondary infection, may be more important than currently estimated. This illustrates the need for more current and detailed datasets, as potential seasonal shifts due to changing meteorological conditions may influence the composition of airborne Oomycetes. An insight into the dynamics of airborne plant pathogens and their major drivers should be useful for improved forecasting and management of related plant diseases.

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Language(s): eng - English
 Dates: 2018
 Publication Status: Published online
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 Rev. Type: -
 Identifiers: ISI: 000450173600001
DOI: 10.3389/fmicb.2018.02673
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Title: Frontiers in Microbiology
  Abbreviation : Front. Microbiol.
Source Genre: Journal
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Publ. Info: Lausanne : Frontiers Media
Pages: - Volume / Issue: 9 Sequence Number: 2673 Start / End Page: - Identifier: ISSN: 1664-302X
CoNE: https://pure.mpg.de/cone/journals/resource/1664-302X