Fluorescent Pseudomonas Strains with only Few Plant-Beneficial Properties Are Favored in the Maize Rhizosphere

Vacheron, Jordan; Moënne‐Loccoz, Yvan; Dubost, Audrey; Gonçalves-Martins, Maximilien; Müller, Daniel; Prigent‐Combaret, Claire

doi:10.3389/fpls.2016.01212

Cited by 47 publications

(50 citation statements)

References 97 publications

(105 reference statements)

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“…The inoculation with P. fluorescens had little quantifiable effect on P uptake, corn development and grain yield. However, P. fluorescens has been reported to favor biological control of plants, production of natural antibiotics and protective effect against secondary soil phytopathogens (Garrido-Sanz et al, 2016), phosphate solubilization (Oteino et al, 2015) and N 2 fixation (Vacheron et al, 2016). Also, P. fluorescens resulted in 35.3 and 7.8% increase in PUE and corn grain yield compared to control treatment, respectively, regardless of P 2 O 5 application rates.…”

Section: Discussionmentioning

confidence: 98%

“…Therefore, the results of our research show that inoculation with B. subtilis and A. brasilense may be a potential strategy to help improving PUE. It is not unusual that PGPB displays several different plant-beneficial properties (Bruto et al, 2014;Vacheron et al, 2016), which is thought to provide higher positive effects on the plant (Bashan and de-Bashan, 2010). This is expected to take place because (i) the effects of different modes of action may add-up quantitatively, or (ii) it could ensure that at least one mode of action is expressed in particular environmental conditions (Vacheron et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

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Corn Yield and Phosphorus Use Efficiency Response to Phosphorus Rates Associated With Plant Growth Promoting Bacteria

Pereira

Galindo

Gazola

et al. 2020

Front. Environ. Sci.

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The use of plant growth promoting bacteria (PGPB) that can solubilize phosphorus (P) has shown potential to improve nutrient availability in grass crops such as corn (Zea mays L.) This study was developed to investigate if inoculation with Azospirillum brasilense, Bacillus subtilis or Pseudomonas fluorescens associated with P 2 O 5 rates can improve phosphorus use efficiency (PUE) reflecting on greater corn development and yield. The field trial was set up in a Rhodic Hapludox under no-till system under Savannah conditions, in a completely randomized block design with four replicates. Treatments were tested in a full factorial design and included: (i) five P 2 O 5 rates (0 to 105 kg ha −1) and (ii) four PGPB seed inoculation (Control-without inoculation, A. brasilense, B. subtilis or P. fluorescens). Inoculation was found to increase grain yield by 39.5, 29.1, and 15.9% when B. subtilis was inoculated in the absence of P 2 O 5 rates and associated with 17.5 and 70 kg P 2 O 5 ha −1 and by 34.7% when A. brasilense was inoculated with application of 105 kg P 2 O 5 ha −1. In addition, inoculation with B. subtilis and A. brasilense were found to increase P uptake, benefiting productive components development, leading to an improved PUE, and greater corn grain yield. The results of this study showed positive improvements in P uptake as a result of B. subtilis and A. brasilense inoculation, with an increase of 100.5 and 54.6% on PUE, respectively; while the P. fluorescens inoculation were less evident. Further research should be conducted under biotic or/and abiotic conditions such as attack of pathogens and insects, drought, salinity, water flooding, low and high temperature to better understand the role of PGPB, inoculated alone or in combination as the co-inoculated method.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Corn Yield and Phosphorus Use Efficiency Response to Phosphorus Rates Associated With Plant Growth Promoting Bacteria

Pereira

Galindo

Gazola

et al. 2020

Front. Environ. Sci.

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“…Pseudomonadaceae are reported to exhibit a wide range of plant-beneficial properties and plant growth-promoting traits. These include phosphate solubilization, nitrogen fixation, synthesis of cytokinins as well as of the phytohormones indole-3-acetic acid (IAA) and gibberellins (Cabanas et al, 2014; Vacheron et al, 2016). The latter was reported to affect seed formation and ripening in grasses (Stoddart, 1965; Kim et al, 2016), emphasizing the importance of Pseudomonadaceae in our study.…”

Section: Discussionmentioning

confidence: 99%

The Influence of Land Use Intensity on the Plant-Associated Microbiome of Dactylis glomerata L.

et al. 2017

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In this study, we investigated the impact of different land use intensities (LUI) on the root-associated microbiome of Dactylis glomerata (orchardgrass). For this purpose, eight sampling sites with different land use intensity levels but comparable soil properties were selected in the southwest of Germany. Experimental plots covered land use levels from natural grassland up to intensively managed meadows. We used 16S rRNA gene based barcoding to assess the plant-associated community structure in the endosphere, rhizosphere and bulk soil of D. glomerata. Samples were taken at the reproductive stage of the plant in early summer. Our data indicated that roots harbor a distinct bacterial community, which clearly differed from the microbiome of the rhizosphere and bulk soil. Our results revealed Pseudomonadaceae, Enterobacteriaceae and Comamonadaceae as the most abundant endophytes independently of land use intensity. Rhizosphere and bulk soil were dominated also by Proteobacteria, but the most abundant families differed from those obtained from root samples. In the soil, the effect of land use intensity was more pronounced compared to root endophytes leading to a clearly distinct pattern of bacterial communities under different LUI from rhizosphere and bulk soil vs. endophytes. Overall, a change of community structure on the plant–soil interface was observed, as the number of shared OTUs between all three compartments investigated increased with decreasing land use intensity. Thus, our findings suggest a stronger interaction of the plant with its surrounding soil under low land use intensity. Furthermore, the amount and quality of available nitrogen was identified as a major driver for shifts in the microbiome structure in all compartments.

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“…Consequently, there is an increasing of water and nutrients absorption (BONILLA, 2011). Many fluorescent Pseudomonas have the capacity of indole-acid production (VACHERON et al, 2016;COELHO, 2009). Andrade (2012) reports that Bacillus can synthesize IAA in banana crop, both by the tryptophandependent pathway and by alternative routes.…”

Section: Evaluation Of Mechanisms Of Plant Growth Promotion In Vitromentioning

confidence: 99%

ISOLATION AND CHARACTERIZATION OF PLANT GROWTH PROMOTING BACTERIA ISOLATED FROM GARLIC (allium sativum).

Botelho¹,

Leoncio

2017

RSA

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-Garlic has great economic and social importance in Santa Catarina. It is a demanding crop in nutrients, being necessary high amount of chemical fertilizers, increasing the cost of production and the environmental impact. An alternative to the use of inputs are Rizobacteria Promoting Plant Growth (RPCP). Among the RPCPs, the most studied genera are Azospirillum, Bacillus and Pseudomonas of the fluorescent group that have shown benefits for the growth of several plant species. In this context, isolates of RPCP obtained from the rhizosphere of garlic maintained in protected cultivation were phenotypically and genotypically characterized and a growth promotion test in vivo was carried out, in protected cultivation. The biochemical tests used for phenotypic characterization were glucose and sucrose fermentation, Methyl Red (MR), catalase production and urea hydrolysis. The potential of plant growth induction was also evaluated by analyzing the production capacity of IAA (Indol-Acetic Acid) and calcium phosphate solubilization in vitro. Twenty-seven isolates were obtained. For the biochemical tests, 21 isolates were able to ferment glucose and 26, sucrose. For the other tests, all isolates showed a positive reaction. As for the mechanisms of plant growth promotion, 81.5% and 66.6% of the isolates presented IAA production and phosphate solubilizing capacity, respectively. The in vivo growth promotion test using maize (Zea mays) as a model indicated that the tested isolates (EB02, EB16, EB14, EB26, EB23) showed similarity to the treatment with 100% recommended nitrogen fertilization. The isolates were identified by sequencing the 16S rRNA gene. Fourteen isolates (51, 85% of the collection) were identified as Bacillus subtillis, including those tested in planta. These microorganisms present potential for the promotion of plant growth.Key words: growth promotion, rizobacteria, liliacea, corn.Resumo -O alho possui grande importância econômica e social em Santa Catarina. É um cultivo exigente em nutrientes, sendo necessária elevada quantidade de fertilizantes químicos, incrementando o custo de produção e o impacto ambiental. Uma alternativa ao uso de insumos são as Rizobactérias Promotoras de Crescimento de Plantas (RPCP). Dentre as RPCPs, os gêneros mais estudados são Azospirillum, Bacillus e Pseudomonas do grupo fluorescente que têm demonstrado benefícios para o crescimento de várias espécies vegetais. Neste contexto, foram caracterizados, fenotípica e genotipicamente, isolados de RPCP obtidos da rizosfera de alho mantido em cultivo protegido e realizado teste de promoção de crescimento in vivo, também em cultivo protegido. Os testes bioquímicos utilizados para caracterização fenotípica foram fermentação de glicose e sacarose, Vermelho de Metila (VM), produção de catalase e hidrólise da ureia. Também foi avaliado o potencial de indução do crescimento vegetal, mediante análise da capacidade de produção de AIA (Ácido Indol-Acético) e de solubilização de fosfatos de cálcio in vitro. Foram obtidos 27 isolados. Para ...

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Fluorescent Pseudomonas Strains with only Few Plant-Beneficial Properties Are Favored in the Maize Rhizosphere

Cited by 47 publications

References 97 publications

Corn Yield and Phosphorus Use Efficiency Response to Phosphorus Rates Associated With Plant Growth Promoting Bacteria

Corn Yield and Phosphorus Use Efficiency Response to Phosphorus Rates Associated With Plant Growth Promoting Bacteria

The Influence of Land Use Intensity on the Plant-Associated Microbiome of Dactylis glomerata L.

ISOLATION AND CHARACTERIZATION OF PLANT GROWTH PROMOTING BACTERIA ISOLATED FROM GARLIC (allium sativum).

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