Communication of plants with microbial world: Exploring the regulatory networks for PGPR mediated defense signaling

Bukhat, Sherien; Imran, Asma; Javaid, Shaista; Shahid, Muhammad; Majeed, Afshan; Naqqash, Tahir

doi:10.1016/j.micres.2020.126486

Cited by 125 publications

(77 citation statements)

References 309 publications

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“…The complex network of interkingdom signaling between plants and PGPR is governed by a number of secondary metabolites and root exudates (Bukhat et al, 2020;Khan et al, 2020a). The nature of such communication is dynamic and influenced by a number of environmental factors.…”

Section: Signaling Molecules Of Pgpr Originmentioning

confidence: 99%

Climate Change and Salinity Effects on Crops and Chemical Communication Between Plants and Plant Growth-Promoting Microorganisms Under Stress

Ullah

Bano

Khan

2021

Front. Sustain. Food Syst.

162

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During the last two decades the world has experienced an abrupt change in climate. Both natural and artificial factors are climate change drivers, although the effect of natural factors are lesser than the anthropogenic drivers. These factors have changed the pattern of precipitation resulting in a rise in sea levels, changes in evapotranspiration, occurrence of flood overwintering of pathogens, increased resistance of pests and parasites, and reduced productivity of plants. Although excess CO2 promotes growth of C3 plants, high temperatures reduce the yield of important agricultural crops due to high evapotranspiration. These two factors have an impact on soil salinization and agriculture production, leading to the issue of water and food security. Farmers have adopted different strategies to cope with agriculture production in saline and saline sodic soil. Recently the inoculation of halotolerant plant growth promoting rhizobacteria (PGPR) in saline fields is an environmentally friendly and sustainable approach to overcome salinity and promote crop growth and yield in saline and saline sodic soil. These halotolerant bacteria synthesize certain metabolites which help crops in adopting a saline condition and promote their growth without any negative effects. There is a complex interkingdom signaling between host and microbes for mutual interaction, which is also influenced by environmental factors. For mutual survival, nature induces a strong positive relationship between host and microbes in the rhizosphere. Commercialization of such PGPR in the form of biofertilizers, biostimulants, and biopower are needed to build climate resilience in agriculture. The production of phytohormones, particularly auxins, have been demonstrated by PGPR, even the pathogenic bacteria and fungi which also modulate the endogenous level of auxins in plants, subsequently enhancing plant resistance to various stresses. The present review focuses on plant-microbe communication and elaborates on their role in plant tolerance under changing climatic conditions.

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Section: Signaling Molecules Of Pgpr Originmentioning

confidence: 99%

Climate Change and Salinity Effects on Crops and Chemical Communication Between Plants and Plant Growth-Promoting Microorganisms Under Stress

Ullah

Bano

Khan

2021

Front. Sustain. Food Syst.

162

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“…tomato) in Arabidopsis through the activation of a SAR pathway [160]. However, the salicylic acid released by rhizobacteria does not need to necessarily mediate the SAR mechanism as SA produced by rhizobacteria may require siderophores for their assimilation [161].…”

Section: Systemic Acquired Resistance (Sar)mentioning

confidence: 99%

Bacterial Plant Biostimulants: A Sustainable Way Towards Improving Growth, Productivity, and Health of Crops

Hamid¹,

Zaman²,

Farooq³

et al. 2021

Preprint

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This review presents a comprehensive and systematic study of the field of bacterial plant biostimulants and considers the fundamental and innovative principles underlying this technology. Plant biostimulants are an important tool for modern agriculture as part of an integrated crop management (ICM) system; helping make agriculture more sustainable and resilient. Plant biostimulants contain substance(s) and/or microorganisms whose function when applied to plants or the rhizosphere, is to stimulate natural processes to enhance plant nutrient uptake, nutrient use efficiency, tolerance to abiotic stress, biocontrol, and crop quality. The use of plant biostimulants has gained substantial and significant heed worldwide as an environment-friendly alternative for sustainable agricultural production. Presently, there is an increasing curiosity of industry and researchers in microbial biostimulants especially, bacterial plant biostimulants (BPBs) to improve crop growth and productivity. The BPBs that are based on PGPR (plant growth-promoting rhizobacteria) play plausible roles to promote/stimulate the crop plant growth through several mechanisms that include, i) nutrient acquisition by nitrogen (N2) fixation and solubilization of insoluble minerals (P, K, Zn), organic acids and siderophores, ii) antimicrobial metabolites and various lytic enzymes, iii) action of growth regulators and stress-responsive/induced phytohormones, iv) ameliorating abiotic stress like drought, high soil salinity, extreme temperatures, oxidative stress, and heavy metals by using different modes of action, and v) plant defense induction modes. Presenting here is a brief review emphasizing the applicability of BPBs as an innovative exertion to fulfill the current food crisis.

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“…Studies have revealed that the plant root exudates and other rhizodeposits lure beneficial bacteria to the rhizosphere, although uninvited ones are also enticed [1]. The host plant induces selection pressure on the development of the rhizosphere microbiome, which favors and attracts a specific plant microbiota due to variations in the composition of the root exudate [17].…”

Section: The Rhizosphere Soil As a Treasure Trove For Bacterial Community Concentrationmentioning

confidence: 99%

“…Despite variations in the dynamics and composition of root exudates, a subset of the bacterial population is designated as the core rhizosphere microbiome, which are ubiquitous across plant species and environment [17]. The microbiota uses the root exudates as a source of energy, and the common genera in the rhizosphere include Burkholderia, Bacillus, Microbacterium, Azospirillum, Serratia, Pseudomonas, Erwinia, Aeromonas, Mesorhizobium, Rahnella, Acinetobacter, Enterobacter and Acinetobacter [31,32].…”

Section: The Rhizosphere Soil As a Treasure Trove For Bacterial Community Concentrationmentioning

confidence: 99%

Elucidating the Rhizosphere Associated Bacteria for Environmental Sustainability

Nwachukwu

Babalola

2021

Agriculture

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The abundance of nutrient accumulation in rhizosphere soils has placed the rhizosphere as an “epicenter” of bacterial concentrations. Nonetheless, over the years, little attention has been given to bacterial inoculants and soil-like substrates. The reason is that many farmers and experiments have focused on chemical fertilizers as an approach to improve plant growth and yield. Therefore, we focused on assessing the application of rhizosphere soil and its associated bacteria for biotechnological applications. This review has been structured into major subunits: rhizosphere soil as a treasure trove for bacterial community concentration, biodegradation of lignocellulose for biofuel production, rhizosphere soil and its bacteria as soil amendments, and the role of rhizosphere soil and its bacteria for bioremediation and biofiltration. Hence, the efficient use of rhizosphere soil and its bacteria in an environmentally friendly way can contribute to healthy and sustainable environments.

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Communication of plants with microbial world: Exploring the regulatory networks for PGPR mediated defense signaling

Cited by 125 publications

References 309 publications

Climate Change and Salinity Effects on Crops and Chemical Communication Between Plants and Plant Growth-Promoting Microorganisms Under Stress

Climate Change and Salinity Effects on Crops and Chemical Communication Between Plants and Plant Growth-Promoting Microorganisms Under Stress

Bacterial Plant Biostimulants: A Sustainable Way Towards Improving Growth, Productivity, and Health of Crops

Elucidating the Rhizosphere Associated Bacteria for Environmental Sustainability

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