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Location, Root Proximity, and Glyphosate-Use History Modulate the Effects of Glyphosate on Fungal Community Networks of Wheat.
Microb Ecol. 2018 Jul; 76(1):240-257.ME

Abstract

Glyphosate is the most-used herbicide worldwide and an essential tool for weed control in no-till cropping systems. However, concerns have been raised regarding the long-term effects of glyphosate on soil microbial communities. We examined the impact of repeated glyphosate application on bulk and rhizosphere soil fungal communities of wheat grown in four soils representative of the dryland wheat production region of Eastern Washington, USA. Further, using soils from paired fields, we contrasted the response of fungal communities that had a long history of glyphosate exposure and those that had no known exposure. Soil fungal communities were characterized after three cycles of wheat growth in the greenhouse followed by termination with glyphosate or manual clipping of plants. We found that cropping system, location, year, and root proximity were the primary drivers of fungal community compositions, and that glyphosate had only small impacts on fungal community composition or diversity. However, the taxa that responded to glyphosate applications differed between rhizosphere and bulk soil and between cropping systems. Further, a greater number of fungal OTUs responded to glyphosate in soils with a long history of glyphosate use. Finally, fungal co-occurrence patterns, but not co-occurrence network characteristics, differed substantially between glyphosate-treated and non-treated communities. Results suggest that most fungi influenced by glyphosate are saprophytes that likely feed on dying roots.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Schlatter DC
USDA-ARS, Wheat Health, Genetics and Quality Research Unit, Washington State University, Pullman, WA, 99164-6430, USA.
Yin C
Department of Plant Pathology, Washington State University, Pullman, WA, 99164-6430, USA.
Burke I
Department of Crop and Soil Sciences, Washington State University, Pullman, WA, 99164-6420, USA.
Hulbert S
Department of Plant Pathology, Washington State University, Pullman, WA, 99164-6430, USA.
Paulitz T
USDA-ARS, Wheat Health, Genetics and Quality Research Unit, Washington State University, Pullman, WA, 99164-6430, USA. timothy.paulitz@ars.usda.gov.

MeSH

AgricultureBiodiversityCommunity NetworksDNA, FungalFungiGlycineHerbicidesMycobiomePlant RootsRhizosphereSequence Analysis, DNASoilSoil MicrobiologyTriticumWashington

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29218372

Citation

Schlatter, Daniel C., et al. "Location, Root Proximity, and Glyphosate-Use History Modulate the Effects of Glyphosate On Fungal Community Networks of Wheat." Microbial Ecology, vol. 76, no. 1, 2018, pp. 240-257.
Schlatter DC, Yin C, Burke I, et al. Location, Root Proximity, and Glyphosate-Use History Modulate the Effects of Glyphosate on Fungal Community Networks of Wheat. Microb Ecol. 2018;76(1):240-257.
Schlatter, D. C., Yin, C., Burke, I., Hulbert, S., & Paulitz, T. (2018). Location, Root Proximity, and Glyphosate-Use History Modulate the Effects of Glyphosate on Fungal Community Networks of Wheat. Microbial Ecology, 76(1), 240-257. https://doi.org/10.1007/s00248-017-1113-9
Schlatter DC, et al. Location, Root Proximity, and Glyphosate-Use History Modulate the Effects of Glyphosate On Fungal Community Networks of Wheat. Microb Ecol. 2018;76(1):240-257. PubMed PMID: 29218372.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Location, Root Proximity, and Glyphosate-Use History Modulate the Effects of Glyphosate on Fungal Community Networks of Wheat. AU - Schlatter,Daniel C, AU - Yin,Chuntao, AU - Burke,Ian, AU - Hulbert,Scot, AU - Paulitz,Timothy, Y1 - 2017/12/07/ PY - 2017/07/26/received PY - 2017/11/17/accepted PY - 2017/12/9/pubmed PY - 2019/2/12/medline PY - 2017/12/9/entrez KW - Fungi KW - Glyphosate KW - Microbiome KW - Networks KW - Triticum aestivum KW - Wheat SP - 240 EP - 257 JF - Microbial ecology JO - Microb Ecol VL - 76 IS - 1 N2 - Glyphosate is the most-used herbicide worldwide and an essential tool for weed control in no-till cropping systems. However, concerns have been raised regarding the long-term effects of glyphosate on soil microbial communities. We examined the impact of repeated glyphosate application on bulk and rhizosphere soil fungal communities of wheat grown in four soils representative of the dryland wheat production region of Eastern Washington, USA. Further, using soils from paired fields, we contrasted the response of fungal communities that had a long history of glyphosate exposure and those that had no known exposure. Soil fungal communities were characterized after three cycles of wheat growth in the greenhouse followed by termination with glyphosate or manual clipping of plants. We found that cropping system, location, year, and root proximity were the primary drivers of fungal community compositions, and that glyphosate had only small impacts on fungal community composition or diversity. However, the taxa that responded to glyphosate applications differed between rhizosphere and bulk soil and between cropping systems. Further, a greater number of fungal OTUs responded to glyphosate in soils with a long history of glyphosate use. Finally, fungal co-occurrence patterns, but not co-occurrence network characteristics, differed substantially between glyphosate-treated and non-treated communities. Results suggest that most fungi influenced by glyphosate are saprophytes that likely feed on dying roots. SN - 1432-184X UR - https://www.unboundmedicine.com/medline/citation/29218372/Location_Root_Proximity_and_Glyphosate_Use_History_Modulate_the_Effects_of_Glyphosate_on_Fungal_Community_Networks_of_Wheat_ DB - PRIME DP - Unbound Medicine ER -