Universität zu Köln

Imparato, Valentina ORCID: 0000-0001-6971-0850, Santos, Susana S., Johansen, Anders ORCID: 0000-0001-7115-948X, Geisen, Stefan ORCID: 0000-0003-0734-727X and Winding, Anne ORCID: 0000-0002-7491-4548 (2016). Stimulation of bacteria and protists in rhizosphere of glyphosate-treated barley. Appl. Soil Ecol., 98. S. 47 - 56. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1873-0272

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Abstract

Glyphosate is extensively used for weed control and to ripen crops. Despite a number of studies on the direct effect of glyphosate on plants and soil organisms, only little is known about indirect effect of glyphosate on rhizosphere microbial communities, following the accelerated turnover of the fast-dying root biomass. In microcosms we studied the indirect effect of glyphosate on the microbial community in the rhizosphere of barley with phyllosphere application of glyphosate in comparison to leaving the plant intact or cutting off the shoot. Attempting to link the response of bacterial and protist communities to foliar application of glyphosate, we measured bacterial and protist abundance, diversity and physiological status, as well as soil organic carbon. Foliar application of glyphosate doubled bacterial abundance of the culturable fraction present in the rhizosphere compared to the other treatments with no effect on total abundance. Also the abundance of culturable protists increased as an effect of glyphosate and the bacterial genetic diversity as revealed by 16S rDNA DGGE analysis was affected. Overall, the results indicate that when barley leaves are treated with glyphosate, the availability of organic carbon in the rhizosphere of the dying roots is altered, which in turn may alter the bacterial and protist communities and their interactions. This can have implications for general soil carbon turnover processes and CO2 release in arable systems. (C) 2015 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Imparato, Valentina UNSPECIFIED orcid.org/0000-0001-6971-0850 UNSPECIFIED Santos, Susana S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Johansen, Anders UNSPECIFIED orcid.org/0000-0001-7115-948X UNSPECIFIED Geisen, Stefan UNSPECIFIED orcid.org/0000-0003-0734-727X UNSPECIFIED Winding, Anne UNSPECIFIED orcid.org/0000-0002-7491-4548 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-286860
DOI:	10.1016/j.apsoil.2015.09.007
Journal or Publication Title:	Appl. Soil Ecol.
Volume:	98
Page Range:	S. 47 - 56
Date:	2016
Publisher:	ELSEVIER SCIENCE BV
Place of Publication:	AMSTERDAM
ISSN:	1873-0272
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MICROBIAL COMMUNITY STRUCTURE; GRADIENT GEL-ELECTROPHORESIS; SHIKIMATE PATHWAY; SURFACE WATERS; SOIL; DYNAMICS; PLANT; ACID; MICROORGANISMS; TRANSLOCATION Multiple languages Soil Science Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/28686