Universität zu Köln

Weidner, Simone, Koller, Robert ORCID: 0000-0001-7251-7242, Latz, Ellen, Kowalchuk, George ORCID: 0000-0003-3866-0832, Bonkowski, Michael ORCID: 0000-0003-2656-1183, Scheu, Stefan and Jousset, Alexandre (2015). Bacterial diversity amplifies nutrient-based plant-soil feedbacks. Funct. Ecol., 29 (10). S. 1341 - 1350. HOBOKEN: WILEY. ISSN 1365-2435

Full text not available from this repository.

Abstract

1. Plants foster diverse assemblages of bacteria in the rhizosphere serving important functions which may result in enhanced plant growth. Microbial diversity is increasingly recognized to shape the functionality of microbial communities. This leads to the assumption that there is a positive relationship between rhizosphere diversity and plant growth. Here we investigate how bacterial diversity affects the mineralization of organic matter and plant nutrient acquisition. 2. We hypothesized that altered bacterial diversity will affect nitrogen mineralization, uptake by plants and ultimately plant growth. We set up a controlled model system with Arabidopsis thaliana colonized by defined assemblages of fluorescent pseudomonads, a well-characterized plant-beneficial rhizosphere taxon. The growth substrate contained casein as sole nitrogen source, making the plant nitrogen uptake dependant on breakdown by bacterial enzymes. 3. Bacterial diversity was associated with a higher enzyme activity which increased nitrogen mineralization and enhanced plant growth. The effect of bacterial diversity on plant growth increased with time, pointing to a positive feedback between bacteria and plants: bigger plants associated with species-rich bacterial communities supported more bacterial growth, which further enhanced the impact of bacteria on plant growth. 4. We demonstrate that plant-soil feedbacks establish rapidly during one single growth season and that bacterial diversity modulates this interaction. Preserving soil microbial diversity therefore may improve positive plant-soil feedbacks and thereby plant growth.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Weidner, Simone UNSPECIFIED UNSPECIFIED UNSPECIFIED Koller, Robert UNSPECIFIED orcid.org/0000-0001-7251-7242 UNSPECIFIED Latz, Ellen UNSPECIFIED UNSPECIFIED UNSPECIFIED Kowalchuk, George UNSPECIFIED orcid.org/0000-0003-3866-0832 UNSPECIFIED Bonkowski, Michael UNSPECIFIED orcid.org/0000-0003-2656-1183 UNSPECIFIED Scheu, Stefan UNSPECIFIED UNSPECIFIED UNSPECIFIED Jousset, Alexandre UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-391523
DOI:	10.1111/1365-2435.12445
Journal or Publication Title:	Funct. Ecol.
Volume:	29
Number:	10
Page Range:	S. 1341 - 1350
Date:	2015
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1365-2435
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GROWTH-PROMOTING RHIZOBACTERIA; RHIZOSPHERE; NITROGEN; BIODIVERSITY; MICROORGANISMS; PRODUCTIVITY; COMPETITION; DETERMINES; RICHNESS; FLOW Multiple languages Ecology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39152