Understanding plant-plant growth-promoting rhizobacteria (PGPR) interactions for inducing plant defense

Seth, Kunal; Vyas, P. R.; Deora, Sandhya; Gupta, Amit; Meena, Mukesh; Swapnil, Prashant; Mangesh, Harish

doi:10.1016/b978-0-323-91876-3.00010-5

Cited by 9 publications

(3 citation statements)

References 96 publications

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“…These elicitors act as microbial associated molecular patterns and are perceived by specific transmembrane pattern recognition receptors, as it has been shown for the pathogen triggered-SAR. However, for a successful symbiosis with plant roots, PGPR have evolved to evade or suppress the pattern triggered immunity developed by the plant as the first line of defense ( Yu et al., 2022 ; Seth et al., 2023 ). This PGPR-induced plant immunity ultimately leads to defense mechanisms such as cell wall reinforcement via deposition of lignin or callose, enhanced production of defense-related proteins (lipoxygenase, glucanase, chitinase, phenylalanine ammonia-lyase) and accumulation of phytoalexins as small-size antimicrobial metabolites ( Abdelaziz et al., 2023 ).…”

Section: Plant Growth-promoting Rhizobacteria In Crop Protectionmentioning

confidence: 99%

Bacillus-based biocontrol beyond chemical control in central Africa: the challenge of turning myth into reality

Nihorimbere,

Korangi Alleluya,

Nimbeshaho

et al. 2024

Front. Plant Sci.

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Agricultural productivity in the Great Lakes Countries of Central Africa, including Burundi, Rwanda, and the Democratic Republic of Congo, is affected by a wide range of diseases and pests which are mainly controlled by chemical pesticides. However, more than 30% of the pesticides used in the region are banned in European Union due to their high toxicity. Globally available safe and eco-friendly biological alternatives to chemicals are virtually non-existent in the region. Bacillus PGPR-based biocontrol products are the most dominant in the market and have proven their efficacy in controlling major plant diseases reported in the region. With this review, we present the current situation of disease and pest management and urge the need to utilize Bacillus-based control as a possible sustainable alternative to chemical pesticides. A repertoire of strains from the Bacillus subtilis group that have shown great potential to antagonize local pathogens is provided, and efforts to promote their use, as well as the search for indigenous and more adapted Bacillus strains to local agro-ecological conditions, should be undertaken to make sustainable agriculture a reality in the region.

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Section: Plant Growth-promoting Rhizobacteria In Crop Protectionmentioning

confidence: 99%

Bacillus-based biocontrol beyond chemical control in central Africa: the challenge of turning myth into reality

Nihorimbere,

Korangi Alleluya,

Nimbeshaho

et al. 2024

Front. Plant Sci.

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“…Bacillus, Rhizobium, and Pseudomonas aeruginosa Predominantly manufacturs acid phosphatases that aid in the mineralization of organic phosphorus in soil, phosphate-solubilizing bacteria play a crucial role in the solubilization of insoluble forms of phosphorus [312] Achromobacter, Flavobacterium, Agrobacterium, Mycobacterium, Gluconacetobacter, Bacillus, Enterobacter, Erwinia, Pseudomonas, and Serratia It binds to iron, phytopathogens are prevented from growing on the host plant. The iron is subsequently released from the siderophore either by reduction to the ferrous state (Fe 2+ ) or by cleavage of the siderophore molecule once the now-soluble iron-siderophore complex has been bound and imported by receptor molecules on the surfaces of bacteria or plants [326][327][328]…”

Section: Phosphatementioning

confidence: 99%

Soil Microbiome: Diversity, Benefits and Interactions with Plants

Chauhan,

Sharma,

Tapwal

et al. 2023

Sustainability

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Plant roots aid the growth and functions of several kinds of microorganisms such as plant growth-promoting rhizobacteria, mycorrhizal fungi, endophytic bacteria, actinomycetes, nematodes, protozoans which may impart significant impacts on plant health and growth. Plant soil–microbe interaction is an intricate, continuous, and dynamic process that occurs in a distinct zone known as the rhizosphere. Plants interact with these soil microbes in a variety of ways, including competitive, exploitative, neutral, commensal, and symbiotic relationships. Both plant and soil types were found to have an impact on the community diversity and structure of the rhizosphere, or vice versa. The diversity of microorganisms in soil is thought to be essential for the management of soil health and quality because it has different plant growth-promoting or biocontrol effects that could be very advantageous for the host plant and alter plant physiology and nutrition. The composition of microbial community is influenced by soil and plant type. Besides these beneficial microbes, the soil also harbors microorganisms that are detrimental to plants, competing for nutrients and space, and causing diseases. Numerous microorganisms have antagonistic activity and the ability to defend plants from soil-borne diseases. The study of the soil microbiome is essential for formulating strategies for transforming the rhizosphere to the benefit of the plants. This review pays special emphasis on the types of microbial populations in the soil and how they influence plant growth, nutrient acquisition, inter-relationships between soil microbes and plants, stress resistance, carbon sequestration, and phytoremediation.

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“…The roots of the plants secrete root exudates, containing various chemical signals, one of which is our compound of interest, flavonoids. The bacterial population responds to this secretion which acts as a signaling molecules as well as source of nutrients for them (Ma et al, 2016;Seth et al, 2023). It has been seen that though a large number of flavonoids are produced in a plant, the compounds have to be secreted from the roots into the rhizosphere and they are very specific in function (Liu and Murray, 2016).…”

Section: Introductionmentioning

confidence: 99%

Recent advancements in multifaceted roles of flavonoids in plant–rhizomicrobiome interactions

Kumar,

Bhardwaj

et al. 2024

Front. Plant Sci.

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The rhizosphere consists of a plethora of microbes, interacting with each other as well as with the plants present in proximity. The root exudates consist of a variety of secondary metabolites such as strigolactones and other phenolic compounds such as coumarin that helps in facilitating communication and forming associations with beneficial microbes in the rhizosphere. Among different secondary metabolites flavonoids (natural polyphenolic compounds) continuously increasing attention in scientific fields for showing several slews of biological activities. Flavonoids possess a benzo-γ-pyrone skeleton and several classes of flavonoids have been reported on the basis of their basic structure such as flavanones, flavonols, anthocyanins, etc. The mutualistic association between plant growth-promoting rhizobacteria (PGPR) and plants have been reported to help the host plants in surviving various biotic and abiotic stresses such as low nitrogen and phosphorus, drought and salinity stress, pathogen attack, and herbivory. This review sheds light upon one such component of root exudate known as flavonoids, which is well known for nodulation in legume plants. Apart from the well-known role in inducing nodulation in legumes, this group of compounds has anti-microbial and antifungal properties helping in establishing defensive mechanisms and playing a major role in forming mycorrhizal associations for the enhanced acquisition of nutrients such as iron and phosphorus. Further, this review highlights the role of flavonoids in plants for recruiting non-mutualistic microbes under stress and other important aspects regarding recent findings on the functions of this secondary metabolite in guiding the plant-microbe interaction and how organic matter affects its functionality in soil.

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Understanding plant-plant growth-promoting rhizobacteria (PGPR) interactions for inducing plant defense

Cited by 9 publications

References 96 publications

Bacillus-based biocontrol beyond chemical control in central Africa: the challenge of turning myth into reality

Bacillus-based biocontrol beyond chemical control in central Africa: the challenge of turning myth into reality

Soil Microbiome: Diversity, Benefits and Interactions with Plants

Recent advancements in multifaceted roles of flavonoids in plant–rhizomicrobiome interactions

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