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Natural genetic variation in Arabidopsis for responsiveness to plant growth-promoting rhizobacteria

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Wintermans, Paul C. A., Bakker, Peter A. H. M., Pieterse, Corné M. J.·2016·Plant Molecular Biology

Abstract

The plant growth-promoting rhizobacterium (PGPR) Pseudomonas simiae WCS417r stimulates lateral root formation and increases shoot growth in Arabidopsis thaliana (Arabidopsis). These plant growth-stimulating effects are partly caused by volatile organic compounds (VOCs) produced by the bacterium. Here, we performed a genome-wide association (GWA) study on natural genetic variation in Arabidopsis for the ability to profit from rhizobacteria-mediated plant growth-promotion. To this end, 302 Arabidopsis accessions were tested for root architecture characteristics and shoot fresh weight in response to exposure to WCS417r. Although virtually all Arabidopsis accessions tested responded positively to WCS417r, there was a large variation between accessions in the increase in shoot fresh weight, the extra number of lateral roots formed, and the effect on primary root length. Correlation analyses revealed that the bacterially-mediated increase in shoot fresh weight is related to alterations in root architecture. GWA mapping for WCS417r-stimulated changes in root and shoot growth characteristics revealed 10 genetic loci highly associated with the responsiveness of Arabidopsis to the plant growth-promoting activity of WCS417r. Several of the underlying candidate genes have been implicated in important plant growth-related processes. These results demonstrate that plants possess natural genetic variation for the capacity to profit from the plant growth-promoting function of a beneficial rhizobacterium in their rhizosphere. This knowledge is a promising starting point for sustainable breeding strategies for future crops that are better able to maximize profitable functions from their root microbiome.

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Metadata

Authors
Wintermans, P. C. A., Bakker, P. A. H. M., & Pieterse, C. M. J.
Venue
Plant Molecular Biology
Published
2016-01-30
Volume
90
Issue
6
Pages
623-634
ISSN
  • 0167-4412 (ISSN-L)
  • 1573-5028
OpenAlex
W2305941773
Cited by
172
References
9
FWCI
16.03
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Natural genetic variation in Arabidopsis for responsiveness to plant growth-promoting rhizobacteria. https://app.cochat.ai/papers/10.1007/s11103-016-0442-2
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Wintermans, P. C. A., Bakker, P. A. H. M., & Pieterse, C. M. J. (2016). Natural genetic variation in Arabidopsis for responsiveness to plant growth-promoting rhizobacteria. Plant Molecular Biology. https://doi.org/10.1007/s11103-016-0442-2

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