Indole-3-acetic acid biosynthetic pathway and aromatic amino acid aminotransferase activities in<i>Pantoea dispersa</i>strain GPK

Kulkarni, Guruprasad; Nayak, Anand S.; Sajjan, S. S.; Oblesha, A.; Karegoudar, T. B.

doi:10.1111/lam.12053

Cited by 19 publications

(13 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Consistent with other Pantoea strains ( Sergeeva et al, 2007 ; Kulkarni et al, 2013 ), we observed that Panteoa sp. YR343 produces IAA, which is synthesized from the amino acid tryptophan ( Patten and Glick, 1996 ), an amino acid commonly found in plant root exudates ( Kamilova et al, 2006 ).…”

Section: Discussionsupporting

confidence: 91%

“…It is thought that P. agglomerans promotes plant growth by enhancing root architecture, which increases the amount of minerals and water that can be taken up by the plant ( Sergeeva et al, 2007 ). P. dispersa and P. agglomerans have been shown to produce IAA and evidence supports the hypothesis that the production of IAA by P. agglomerans is responsible for its plant growth-promoting abilities ( Sergeeva et al, 2007 ; Kulkarni et al, 2013 ). Additional studies have shown that production of exopolysaccharides by P. agglomerans contributes to soil aggregation and moisture control, which also enhances plant growth ( Amellal et al, 1998 ).…”

Section: Introductionsupporting

confidence: 55%

See 1 more Smart Citation

A Carotenoid-Deficient Mutant in Pantoea sp. YR343, a Bacteria Isolated from the Rhizosphere of Populus deltoides, Is Defective in Root Colonization

et al. 2016

View full text Add to dashboard Cite

The complex interactions between plants and their microbiome can have a profound effect on the health and productivity of the plant host. A better understanding of the microbial mechanisms that promote plant health and stress tolerance will enable strategies for improving the productivity of economically important plants. Pantoea sp. YR343 is a motile, rod-shaped bacterium isolated from the roots of Populus deltoides that possesses the ability to solubilize phosphate and produce the phytohormone indole-3-acetic acid (IAA). Pantoea sp. YR343 readily colonizes plant roots and does not appear to be pathogenic when applied to the leaves or roots of selected plant hosts. To better understand the molecular mechanisms involved in plant association and rhizosphere survival by Pantoea sp. YR343, we constructed a mutant in which the crtB gene encoding phytoene synthase was deleted. Phytoene synthase is responsible for converting geranylgeranyl pyrophosphate to phytoene, an important precursor to the production of carotenoids. As predicted, the ΔcrtB mutant is defective in carotenoid production, and shows increased sensitivity to oxidative stress. Moreover, we find that the ΔcrtB mutant is impaired in biofilm formation and production of IAA. Finally we demonstrate that the ΔcrtB mutant shows reduced colonization of plant roots. Taken together, these data suggest that carotenoids are important for plant association and/or rhizosphere survival in Pantoea sp. YR343.

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Introductionsupporting

confidence: 55%

A Carotenoid-Deficient Mutant in Pantoea sp. YR343, a Bacteria Isolated from the Rhizosphere of Populus deltoides, Is Defective in Root Colonization

et al. 2016

View full text Add to dashboard Cite

show abstract

“…An important feature of these enzymes is their broad substrate specificity, being able to use also dicarboxylic amino and oxo-acids as substrates [ 57 ], which is paired by their functional heterogeneity in terms of metabolic role. AroAT from plants are highly specific for Trp transamination, as a step for the synthesis of the plant hormone indoleacetic acid [ 58 ]. In bacteria, they are mostly involved in the synthesis of Phe and Tyr from the corresponding oxoacids [ 59 , 60 ].…”

Section: A Biochemical Overview Of Microbial and Host Trp-metabolimentioning

confidence: 99%

Pyridoxal 5′-Phosphate-Dependent Enzymes at the Crossroads of Host–Microbe Tryptophan Metabolism

Cellini

Zelante

Dindo

et al. 2020

IJMS

View full text Add to dashboard Cite

The chemical processes taking place in humans intersects the myriad of metabolic pathways occurring in commensal microorganisms that colonize the body to generate a complex biochemical network that regulates multiple aspects of human life. The role of tryptophan (Trp) metabolism at the intersection between the host and microbes is increasingly being recognized, and multiple pathways of Trp utilization in either direction have been identified with the production of a wide range of bioactive products. It comes that a dysregulation of Trp metabolism in either the host or the microbes may unbalance the production of metabolites with potential pathological consequences. The ability to redirect the Trp flux to restore a homeostatic production of Trp metabolites may represent a valid therapeutic strategy for a variety of pathological conditions, but identifying metabolic checkpoints that could be exploited to manipulate the Trp metabolic network is still an unmet need. In this review, we put forward the hypothesis that pyridoxal 5′-phosphate (PLP)-dependent enzymes, which regulate multiple pathways of Trp metabolism in both the host and in microbes, might represent critical nodes and that modulating the levels of vitamin B6, from which PLP is derived, might represent a metabolic checkpoint to re-orienteer Trp flux for therapeutic purposes.

show abstract

“…On the other hand, many nonpathogenic Pantoea spp. can promote growth in plants by promoting nitrogen fixation and acting as biofertilizers (6) or by producing plant growth hormones (7). Commercially, several Pantoea spp.…”

Section: Genome Announcementmentioning

confidence: 99%

Draft Genome Sequence of Pantoea sp. Strain MBLJ3, Isolated in a Laboratory Environmental Control Study

et al. 2015

View full text Add to dashboard Cite

show abstract

Indole-3-acetic acid biosynthetic pathway and aromatic amino acid aminotransferase activities inPantoea dispersastrain GPK

Cited by 19 publications

References 23 publications

A Carotenoid-Deficient Mutant in Pantoea sp. YR343, a Bacteria Isolated from the Rhizosphere of Populus deltoides, Is Defective in Root Colonization

A Carotenoid-Deficient Mutant in Pantoea sp. YR343, a Bacteria Isolated from the Rhizosphere of Populus deltoides, Is Defective in Root Colonization

Pyridoxal 5′-Phosphate-Dependent Enzymes at the Crossroads of Host–Microbe Tryptophan Metabolism

Draft Genome Sequence of Pantoea sp. Strain MBLJ3, Isolated in a Laboratory Environmental Control Study

Contact Info

Product

Resources

About