The expression of an exogenous ACC deaminase by the endophyte<i>Serratia grimesii</i>BXF1 promotes the early nodulation and growth of common bean

Tavares, M. A.; Nascimento, Francisco X.; Glick, Bernard R.; Rossi, Márcio José

doi:10.1111/lam.12847

Cited by 53 publications

(30 citation statements)

References 40 publications

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“…Strain MSR2 is able to produce increased levels of IAA, and possibly other phytohormones such as cytokinins (discussed below), that significantly impact the nodulation process (Miri et al, 2016;Nadzieja et al, 2018). In addition, strain MSR2 contains ACC deaminase activity, which facilitates the nodulation process of leguminous plants by decreasing inhibitory ethylene levels (Nascimento et al, 2016a;Nascimento et al, 2016b;Tavares et al, 2018;Nascimento et al, 2019b).…”

Section: Resultsmentioning

confidence: 99%

The extreme plant‐growth‐promoting properties ofPantoea phytobeneficialisMSR2 revealed by functional and genomic analysis

Nascimento

Hernández

Glick

et al. 2020

Environmental Microbiology

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Summary Numerous Pantoea strains are important because of the benefit they provide in the facilitation of plant growth. However, Pantoea have a high level of genotypic diversity and not much is understood regarding their ability to function in a plant beneficial manner. In the work reported here, the plant growth promotion activities and the genomic properties of the unusual Pantoea phytobeneficialis MSR2 are elaborated, emphasizing the genetic mechanisms involved in plant colonization and growth promotion. Detailed analysis revealed that strain MSR2 belongs to a rare group of Pantoea strains possessing an astonishing number of plant growth promotion genes, including those involved in nitrogen fixation, phosphate solubilization, 1‐aminocyclopropane‐1‐carboxylic acid deaminase activity, indoleacetic acid and cytokinin biosynthesis, and jasmonic acid metabolism. Moreover, the genome of this bacterium also contains genes involved in the metabolism of lignin and other plant cell wall compounds, quorum‐sensing mechanisms, metabolism of plant root exudates, bacterial attachment to plant surfaces and resistance to plant defences. Importantly, the analysis revealed that most of these genes are present on accessory plasmids that are found within a small subset of Pantoea genomes, reinforcing the idea that Pantoea evolution is largely mediated by plasmids, providing new insights into the evolution of beneficial plant‐associated Pantoea.

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Section: Resultsmentioning

confidence: 99%

The extreme plant‐growth‐promoting properties ofPantoea phytobeneficialisMSR2 revealed by functional and genomic analysis

Nascimento

Hernández

Glick

et al. 2020

Environmental Microbiology

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“…NER improve nodulation and N 2 fixation through different direct and indirect mechanisms, including production of one or more phytohormones, most often IAA, gibberellic acid and cytokinins (Bottini et al 1989;Hayashi et al 2014). In addition, they can increase nutrient (mainly P and Fe) availability in the root zone (Chebotar et al 2001;Argaw 2012), inhibit phytopathogens (Tavares et al 2018) and modify rhizosphere chemicals, such as ethylene (Nascimento et al 2018). The use of NER can significantly increase the ability of rhizobia resident in soil to form nodules, fix N and increase growth in soybean, Glycine max (Dashti et al 1998), mung bean (Shaharoona et al 2006), chickpea, Cicer arietinum (Abdiev et al 2019) and common bean (Chihaoui et al 2015).…”

Section: Legume-rhizobia-pgpr Interactionsmentioning

confidence: 99%

Mechanisms in plant growth‐promoting rhizobacteria that enhance legume–rhizobial symbioses

Alemneh

Zhou

Ryder

et al. 2020

J. Appl. Microbiol.

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Nitrogen fixation is an important biological process in terrestrial ecosystems and for global crop production. Legume nodulation and N 2 fixation have been improved using nodule-enhancing rhizobacteria (NER) under both regular and stressed conditions. The positive effect of NER on legume-rhizobia symbiosis can be facilitated by plant growth-promoting (PGP) mechanisms, some of which remain to be identified. NER that produce aminocyclopropane-1carboxylic acid deaminase and indole acetic acid enhance the legume-rhizobia symbiosis through (i) enhancing the nodule induction, (ii) improving the competitiveness of rhizobia for nodulation, (iii) prolonging functional nodules by suppressing nodule senescence and (iv) upregulating genes associated with legume-rhizobia symbiosis. The means by which these processes enhance the legume-rhizobia symbiosis is the focus of this review. A better understanding of the mechanisms by which PGP rhizobacteria operate, and how they can be altered, will provide opportunities to enhance legume-rhizobial interactions, to provide new advances in plant growth promotion and N 2 fixation. Highlights • ACC deaminase and IAA synthesis enhance nodule formation. • ACC deaminase and IAA synthesis improve the competitiveness of rhizobia for nodule induction. • IAA synthesis enhances N 2 fixation by upregulating the expression of genes associated with legume-rhizobia symbioses. • ACC deaminase prolongs nodule function by delaying nodule senescence. • ACC deaminase can reduce the negative influence of very high IAA on nodule induction.

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“…Inoculation of leguminous plants with ACC deaminase-producing rhizobia, inoculated singly or in consortia with free-living ACC deaminase-producing bacteria, leads to an increased nodulation phenotype (reviewed in Nascimento et al, 2016 ). By decreasing ACC levels these bacteria diminish the inhibitory ET concentrations that affect several phases of the nodulation process ( Ma et al, 2003 ).…”

Section: Counter Attack! Bacterial Modulation Of Plant Acc and Et Levmentioning

confidence: 99%

“…UW4, but not its acdS - mutant, increased the colonization of the arbuscular mycorrhizal fungus, Gigaspora margarita BEG9 in cucumber, leading to synergistic effects on plant growth ( Gamalero et al, 2008 ). Furthermore, several reports have shown that free-living rhizospheric bacteria with ACC deaminase activity readily promote the nodulation process of several leguminous plants ( Nascimento et al, 2016 ). These results indicate that the presence of bacteria with ACC deaminase activity can readily impact the colonization of other microorganisms present in the rhizosphere, including symbionts.…”

Section: Future Directionsmentioning

confidence: 99%

Ethylene and 1-Aminocyclopropane-1-carboxylate (ACC) in Plant–Bacterial Interactions

2018

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Ethylene and its precursor 1-aminocyclopropane-1-carboxylate (ACC) actively participate in plant developmental, defense and symbiotic programs. In this sense, ethylene and ACC play a central role in the regulation of bacterial colonization (rhizospheric, endophytic, and phyllospheric) by the modulation of plant immune responses and symbiotic programs, as well as by modulating several developmental processes, such as root elongation. Plant-associated bacterial communities impact plant growth and development, both negatively (pathogens) and positively (plant-growth promoting and symbiotic bacteria). Some members of the plant-associated bacterial community possess the ability to modulate plant ACC and ethylene levels and, subsequently, modify plant defense responses, symbiotic programs and overall plant development. In this work, we review and discuss the role of ethylene and ACC in several aspects of plant-bacterial interactions. Understanding the impact of ethylene and ACC in both the plant host and its associated bacterial community is key to the development of new strategies aimed at increased plant growth and protection.

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The expression of an exogenous ACC deaminase by the endophyteSerratia grimesiiBXF1 promotes the early nodulation and growth of common bean

Cited by 53 publications

References 40 publications

The extreme plant‐growth‐promoting properties ofPantoea phytobeneficialisMSR2 revealed by functional and genomic analysis

The extreme plant‐growth‐promoting properties ofPantoea phytobeneficialisMSR2 revealed by functional and genomic analysis

Mechanisms in plant growth‐promoting rhizobacteria that enhance legume–rhizobial symbioses

Ethylene and 1-Aminocyclopropane-1-carboxylate (ACC) in Plant–Bacterial Interactions

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