Root Colonization and Quorum Sensing are the Driving forces of Plant Growth Promoting Rhizobacteria (pgpr) for Growth Promotion

Podile, Appa Rao; Vukanti, Raja; Sravani, A.; Kalam, Sadaf; Dutta, Sikha; Durgeshwar, P.; Rao, VM

doi:10.16943/ptinsa/2014/v80i2/55117

Cited by 31 publications

(8 citation statements)

References 58 publications

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“…Mathesius et al (2003) reported the root exudates of Medicago truncatula contained substances that mimic a AHL function that regulate AHL-regulated response in bacteria. The chemical constituent of such active QS-acting signaling molecules is not yet characterized and requires further study (Chen et al, 2002;Podile et al, 2013). A recent hypothesis reveals that alkamides and N-acylethanolamines (NAEs) are excellent candidates to act as AHL mimics, regarding their structural, chemical identity (Aziz and Chapman, 2020).…”

Section: Inter-and Intra-species Signaling and Signal Interferencementioning

confidence: 99%

“…The AHL-cleaving enzyme, aiiA, allows Bacillus strains to break the lactone bond of AHLs through hydrolysis, expressing a procedure for an autoinducer-cleaving activity that permits these bacteria to coexist with other Gram-negative bacteria (Lee et al, 2002). Therefore, the rhizobacteria's role can be directly or indirectly altered by plants and other microbial community members via QS signaling molecules (Podile et al, 2013).…”

Section: Inter-and Intra-species Signaling and Signal Interferencementioning

confidence: 99%

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Unraveling the secrets of rhizobacteria signaling in rhizosphere

2022

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Section: Inter-and Intra-species Signaling and Signal Interferencementioning

confidence: 99%

Section: Inter-and Intra-species Signaling and Signal Interferencementioning

confidence: 99%

Unraveling the secrets of rhizobacteria signaling in rhizosphere

2022

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“…Plant growth-promoting rhizobacteria (PGPR) are a gathering of free-living microorganisms that colonize the rhizosphere and add to the expanded development and yield of harvest plants (Kloepper et al, 1978). Understanding the impact of ecological variables is broadly perceived as a key to improving the level and dependability of PGPR, build up an adequate populace on the host roots and different mixes delivered by root zone microbes (which straight forwardly or in a roundabout way impact the rhizosphere climate) seem, by all accounts, to be more basic for progress and attractive way to reduce the usage of chemical fertilizers, pesticides and supplements and a significant increase in plant height, root length and dry matter production of shoot and root of plants (Podile et al, 2014).…”

Section: Plant Growth Promoting Rhizobacteria (Pgpr)mentioning

confidence: 99%

Promoting Rhizosphere Microorganisms and Biopesticides: A Review

Kannan¹,

Dhivya²,

Sakkamuthu³

2021

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Microbes are associated inside and outside tissue parts of producers like plants, lichen, algae and phototrophic bacteria. Biofertilizer bacteria, fungi, algae and protozoa provide the suitable environment condition, nutrition constituents and inhibit harmful microorganism from rhizosphere zone. Biofertilizer and biocontrol microbes play key roles for improved soil texture, secreting, hormones, antibiotics and various stress signal compounds, enhancement plant parts elongation and prevent pathogen microbial population. Plant growth promotion rhizosphere microorganisms can improve crop tolerance for the non- living stresses such as drought, heat and salinity and living stress such as soil borne pathogens, over load of the microbial population liable to turn out to be more incessant as various atmosphere design keep on creating. Plant disease major issue for loss of productivity and unsafe for living organism due to chemical pesticides, insecticides, fungicides, bactericides and chemical fertilizer. Due to its high potential as an alternative/complement to these pesticides, biological disease control is now generally recognized and constitutes a low cost-efficient eco-friendly biofertilizer, biocontrol, biopesticide and bioinsecticide.

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“…For example, plants that are subject to pathogen or insect attack can recruit protective bacteria and enhance microbial activity to suppress pathogens in the rhizosphere [ 123 ]. The bacteria themselves are also actively involved in the colonization process, using traits such as motility, chemotaxis and quorum-sensing to aggregate near the roots of plants or compete with neighboring bacteria [ 124 , 125 , 126 , 127 , 128 , 129 ]. The mechanisms behind plant-mediated modulation of the rhizosphere and root endosphere microbiomes are currently being been unraveled; it has been shown that defense hormone signaling selects specific bacterial families for colonization from the available microbial communities [ 130 ], and shapes the root microbiota during plant nutrient stress [ 131 ].…”

Section: Horizontal Transmissionmentioning

confidence: 99%

Transmission of Bacterial Endophytes

2017

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Plants are hosts to complex communities of endophytic bacteria that colonize the interior of both below- and aboveground tissues. Bacteria living inside plant tissues as endophytes can be horizontally acquired from the environment with each new generation, or vertically transmitted from generation to generation via seed. A better understanding of bacterial endophyte transmission routes and modes will benefit studies of plant–endophyte interactions in both agricultural and natural ecosystems. In this review, we provide an overview of the transmission routes that bacteria can take to colonize plants, including vertically via seeds and pollen, and horizontally via soil, atmosphere, and insects. We discuss both well-documented and understudied transmission routes, and identify gaps in our knowledge on how bacteria reach the inside of plants. Where little knowledge is available on endophytes, we draw from studies on bacterial plant pathogens to discuss potential transmission routes. Colonization of roots from soil is the best studied transmission route, and probably the most important, although more studies of transmission to aerial parts and stomatal colonization are needed, as are studies that conclusively confirm vertical transfer. While vertical transfer of bacterial endophytes likely occurs, obligate and strictly vertically transferred symbioses with bacteria are probably unusual in plants. Instead, plants appear to benefit from the ability to respond to a changing environment by acquiring its endophytic microbiome anew with each generation, and over the lifetime of individuals.

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Root Colonization and Quorum Sensing are the Driving forces of Plant Growth Promoting Rhizobacteria (pgpr) for Growth Promotion

Cited by 31 publications

References 58 publications

Unraveling the secrets of rhizobacteria signaling in rhizosphere

Unraveling the secrets of rhizobacteria signaling in rhizosphere

Promoting Rhizosphere Microorganisms and Biopesticides: A Review

Transmission of Bacterial Endophytes

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