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Agriculture 2017, 7(5), 40; doi:10.3390/agriculture7050040

Enhanced Plant Performance in Cicer arietinum L. Due to the Addition of a Combination of Plant Growth-Promoting Bacteria

1
Department of Physical, Chemical and Natural Systems, University Pablo de Olavide, Seville 41013, Spain
2
Botany and Zoology Department, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa
*
Author to whom correspondence should be addressed.
Academic Editor: Yinglong Chen
Received: 27 February 2017 / Revised: 24 April 2017 / Accepted: 27 April 2017 / Published: 2 May 2017
(This article belongs to the Special Issue Dynamics of Root–Soil–Microbial Interactions)
View Full-Text   |   Download PDF [429 KB, uploaded 2 May 2017]   |  

Abstract

Current agriculture is based on external fertilizers that jeopardize soil fertility. Alternative fertilization systems might come from the use of soil-borne bacteria with plant growth enhancing ability. Here, six bacterial strains that produce varying concentrations of indole acetic acid (IAA) were tested individually and in consortia for plant growth promotion and fitness-related traits of Cicer arietinum. The nitrogen fixer Mesorhizobium ciceri consistently increased biomass production and N content. In the absence of this strain, IAA Psedomonas putida and Bacillus megaterium hindered plant growth and fitness-related traits. The application of mixes of the three strains always resulted in better plant performance when M. ciceri was present. Mixes that included a P. putida strain that produced low levels of IAA appeared more likely to promote plant growth than mixes that included P. putida strains that produced high levels of IAA or mixes that included B. megaterium. The low levels of IAA produced by the selected strains, compared to the high IAA-producing strains had a significantly greater positive effect on plant biomass accumulation, flower, pod, and seed production, and total plant nitrogen and nitrogen concentrations in seeds. View Full-Text
Keywords: Cicer arietimum; Indole Acetic Acid; Bacillus megaterium; Pseudomonas putida; Mesorhizobium ciceri Cicer arietimum; Indole Acetic Acid; Bacillus megaterium; Pseudomonas putida; Mesorhizobium ciceri
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Pérez-Fernández, M.; Alexander, V. Enhanced Plant Performance in Cicer arietinum L. Due to the Addition of a Combination of Plant Growth-Promoting Bacteria. Agriculture 2017, 7, 40.

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