Siderophore Producing PGPR for Crop Nutrition and Phytopathogen Suppression

Sayyed, R. Z.; Chincholkar, S. B.; Reddy, M. S.; Gangurde, N. S.; Patel, P. R.

doi:10.1007/978-3-642-33639-3_17

Cited by 78 publications

(39 citation statements)

References 57 publications

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“…Their main inhibitory activity occurs in low iron concentrations (Sayyed et al . ) and in the case of the dual culture assay, there was a significant fungal inhibition in spite of being carried out in V8 Agar, a rather rich medium. Although it has been reported that in the rhizosphere siderophore‐producing bacteria may control phytopathogens when iron availability is limited, it is unlikely that pyoverdines are the responsible compounds for the antagonistic effect in other conditions (Sayyed et al .…”

Section: Discussionmentioning

confidence: 96%

“…Although it has been reported that in the rhizosphere siderophore‐producing bacteria may control phytopathogens when iron availability is limited, it is unlikely that pyoverdines are the responsible compounds for the antagonistic effect in other conditions (Sayyed et al . ). Nonetheless, pyoverdines may contribute to the antagonism, particularly in iron stress conditions, where siderophores have been reported to provide bacteria with a competitive advantage in the rhizosphere (Lim et al .…”

Section: Discussionmentioning

confidence: 97%

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Characterization ofPseudomonas chlororaphisfromTheobroma cacaoL. rhizosphere with antagonistic activity againstPhytophthora palmivora(Butler)

et al. 2015

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 97%

Characterization ofPseudomonas chlororaphisfromTheobroma cacaoL. rhizosphere with antagonistic activity againstPhytophthora palmivora(Butler)

et al. 2015

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“…As regards the indirect means of plant growth promotion, in P. agglomerans C1 genome, we found (Table 4) genes encoding enzymes involved in the synthesis of volatile organic compounds (acetoin and 2,3-butanediol; [43,44], Gamma-Aminobutyric Acid (GABA) [45], and siderophores [46], as well as genes encoding the three components of EfeUOB transporter, a ferrous iron transporter induced by low pH and low iron [47].…”

Section: Plant Beneficial Properties Of Pantoea Agglomerans C1mentioning

confidence: 99%

Genome Sequencing of Pantoea agglomerans C1 Provides Insights into Molecular and Genetic Mechanisms of Plant Growth-Promotion and Tolerance to Heavy Metals

et al. 2020

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Distinctive strains of Pantoea are used as soil inoculants for their ability to promote plant growth. Pantoea agglomerans strain C1, previously isolated from the phyllosphere of lettuce, can produce indole-3-acetic acid (IAA), solubilize phosphate, and inhibit plant pathogens, such as Erwinia amylovora. In this paper, the complete genome sequence of strain C1 is reported. In addition, experimental evidence is provided on how the strain tolerates arsenate As (V) up to 100 mM, and on how secreted metabolites like IAA and siderophores act as biostimulants in tomato cuttings. The strain has a circular chromosome and two prophages for a total genome of 4,846,925-bp, with a DNA G+C content of 55.2%. Genes related to plant growth promotion and biocontrol activity, such as those associated with IAA and spermidine synthesis, solubilization of inorganic phosphate, acquisition of ferrous iron, and production of volatile organic compounds, siderophores and GABA, were found in the genome of strain C1. Genome analysis also provided better understanding of the mechanisms underlying strain resistance to multiple toxic heavy metals and transmission of these genes by horizontal gene transfer. Findings suggested that strain C1 exhibits high biotechnological potential as plant growth-promoting bacterium in heavy metal polluted soils.

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“… Bonkowski and Brandt (2002) provided some evidence that grazing may in particular result in an increase of the abundance and activity of plant growth promoting rhizobacteria (PGPR). Various mechanisms for the effects of PGPR on plants have been described like antagonism to fungal pathogens, enhancing nutrient availability like phosphate ( Hassan et al, 2010 ) or iron ( Sayyed et al, 2013 ) and the release of bacterial volatiles as inducer of systemic resistance ( Ping and Boland, 2004 ). The production of 1-aminocyclopropane-1-carboxylate (ACC) deaminase ( Ma et al, 2003 ) reduces ethylene levels and thus facilitates plant growth following an environmental stress ( Friesen et al, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Rhizosphere Protists Change Metabolite Profiles in Zea mays

et al. 2018

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Plant growth and productivity depend on the interactions of the plant with the associated rhizosphere microbes. Rhizosphere protists play a significant role in this respect: considerable efforts have been made in the past to reveal the impact of protist-bacteria interactions on the remobilization of essential nutrients for plant uptake, or the grazing induced changes on plant-growth promoting bacteria and the root-architecture. However, the metabolic responses of plants to the presence of protists or to protist-bacteria interactions in the rhizosphere have not yet been analyzed. Here we studied in controlled laboratory experiments the impact of bacterivorous protists in the rhizosphere on maize plant growth parameters and the bacterial community composition. Beyond that we investigated the induction of plant biochemical responses by separately analyzing above- and below-ground metabolite profiles of maize plants incubated either with a soil bacterial inoculum or with a mixture of soil bacteria and bacterivorous protists. Significantly distinct leaf and root metabolite profiles were obtained from plants which grew in the presence of protists. These profiles showed decreased levels of a considerable number of metabolites typical for the plant stress reaction, such as polyols, a number of carbohydrates and metabolites connected to phenolic metabolism. We assume that this decrease in plant stress is connected to the grazing induced shifts in rhizosphere bacterial communities as shown by distinct T-RFLP community profiles. Protist grazing had a clear effect on the overall bacterial community composition, richness and evenness in our microcosms. Given the competition of plant resource allocation to either defense or growth, we propose that a reduction in plant stress levels caused directly or indirectly by protists may be an additional reason for corresponding positive effects on plant growth.

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Siderophore Producing PGPR for Crop Nutrition and Phytopathogen Suppression

Cited by 78 publications

References 57 publications

Characterization ofPseudomonas chlororaphisfromTheobroma cacaoL. rhizosphere with antagonistic activity againstPhytophthora palmivora(Butler)

Characterization ofPseudomonas chlororaphisfromTheobroma cacaoL. rhizosphere with antagonistic activity againstPhytophthora palmivora(Butler)

Genome Sequencing of Pantoea agglomerans C1 Provides Insights into Molecular and Genetic Mechanisms of Plant Growth-Promotion and Tolerance to Heavy Metals

Rhizosphere Protists Change Metabolite Profiles in Zea mays

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