Unraveling the secrets of rhizobacteria signaling in rhizosphere

Singh, Kumud K.; Chandra, Ram; Purchase, Diane

doi:10.1016/j.rhisph.2022.100484

Cited by 17 publications

(6 citation statements)

References 167 publications

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“…They act as chemoattractants for bacteria involved in symbiotic interactions with the plant, such as rhizobia [ 80 ]. Additionally, flavonoids stimulate biofilm production, promoting bacterial colonization of roots, which can lead to better plant growth and health [ 81 ]. Interestingly, the hydroponic solution of peas inoculated with S. sediminicola contained flavonoids, which were not detected in the non-inoculated condition.…”

Section: Discussionmentioning

confidence: 99%

Optimizing Crop Production with Bacterial Inputs: Insights into Chemical Dialogue between Sphingomonas sediminicola and Pisum sativum

et al. 2023

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The use of biological inputs is an interesting approach to optimize crop production and reduce the use of chemical inputs. Understanding the chemical communication between bacteria and plants is critical to optimizing this approach. Recently, we have shown that Sphingomonas (S.) sediminicola can improve both nitrogen supply and yield in pea. Here, we used biochemical methods and untargeted metabolomics to investigate the chemical dialog between S. sediminicola and pea. We also evaluated the metabolic capacities of S. sediminicola by metabolic profiling. Our results showed that peas release a wide range of hexoses, organic acids, and amino acids during their development, which can generally recruit and select fast-growing organisms. In the presence of S. sediminicola, a more specific pattern of these molecules took place, gradually adapting to the metabolic capabilities of the bacterium, especially for pentoses and flavonoids. In turn, S. sediminicola is able to produce several compounds involved in cell differentiation, biofilm formation, and quorum sensing to shape its environment, as well as several molecules that stimulate pea growth and plant defense mechanisms.

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Section: Discussionmentioning

confidence: 99%

Optimizing Crop Production with Bacterial Inputs: Insights into Chemical Dialogue between Sphingomonas sediminicola and Pisum sativum

et al. 2023

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“…Importantly, soil microbial communities affect aboveground performance, either through inter-specific or conspecific plants, or even kin and non-kin individuals [ 116 , 142 , 197 ]. Plants can shape soil microbiota through root-secreted allelochemicals and signaling chemicals [ 140 , 175 , 179 , 184 , 198 ]. In turn, chemically mediated soil microbial communities drive plant–soil feedback, affecting flowering and reproduction [ 22 , 199 , 200 ], and thus altering plant fitness ( Figure 2 ).…”

Section: Chemically Mediated Root–soil Interactions and Plant–soil Fe...mentioning

confidence: 99%

“…The flowering of plants is mostly aboveground leaves sensing environmental factors. Recent studies have shown that rhizosphere and soil microbial communities can alter the selection intensity of plant flowering phenology and flowering time [198][199][200][201]. In particular, root-secreted signaling chemicals can recruit specific microbes to alter the rhizosphere and soil microbial communities, impacting the flowering of plants [124,199].…”

Section: Belowground and Aboveground Interactionsmentioning

confidence: 99%

Chemically Mediated Plant–Plant Interactions: Allelopathy and Allelobiosis

Kong,

Li,

et al. 2024

Plants

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Plant–plant interactions are a central driver for plant coexistence and community assembly. Chemically mediated plant–plant interactions are represented by allelopathy and allelobiosis. Both allelopathy and allelobiosis are achieved through specialized metabolites (allelochemicals or signaling chemicals) produced and released from neighboring plants. Allelopathy exerts mostly negative effects on the establishment and growth of neighboring plants by allelochemicals, while allelobiosis provides plant neighbor detection and identity recognition mediated by signaling chemicals. Therefore, plants can chemically affect the performance of neighboring plants through the allelopathy and allelobiosis that frequently occur in plant–plant intra-specific and inter-specific interactions. Allelopathy and allelobiosis are two probably inseparable processes that occur together in plant–plant chemical interactions. Here, we comprehensively review allelopathy and allelobiosis in plant–plant interactions, including allelopathy and allelochemicals and their application for sustainable agriculture and forestry, allelobiosis and plant identity recognition, chemically mediated root–soil interactions and plant–soil feedback, and biosynthesis and the molecular mechanisms of allelochemicals and signaling chemicals. Altogether, these efforts provide the recent advancements in the wide field of allelopathy and allelobiosis, and new insights into the chemically mediated plant–plant interactions.

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“…Salicylic and jasmonic acids are involved in shaping rhizospheric microbial community. Microbial abundance is relatively high in the presence of these phytohormones and provoke plant immunity [50]. Although volatile organic compounds (VOCs) are quite significant aboveground signaling molecules, however, minute quantity of VOCs is also released in the form of root exudates.…”

Section: Rhizospheric Phyto-signalingmentioning

confidence: 99%

Bacterial Symbiotic Signaling in Modulating Plant-Rhizobacterial Interactions

Tariq¹,

Ahmed²

2023

Symbiosis in Nature

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Rhizosphere is the hub for microbial activities where microbes and plants interact with complex signaling mechanisms. Plants release various metabolites in response to environmental factors which are significant in shaping rhizospheric microbial communities. These microbes develop symbiotic relation with plants by quorum sensing signals and regulate various microbial activities including biofilm formation. Biofilms are important in inhabiting rhizosphere and provide platform for cell-to-cell microbial interactions. Biofilm- forming rhizobacteria can successfully colonize plant roots and establish symbiotic relations with host. During this association, rhizobacteria are flourished by using plant root exudates, while the bacteria benefit the plants by synthesizing phytohormones, locking soil minerals for plant, protecting them from pathogenic invasions and enhancing plant immunity by improving plant tolerance against various environmental conditions. Indole is an effector molecule in regulating bacterial gene expression related to biofilm production. These interactions are coordinated by bacterially released phytohormones mainly auxin which act as key factor in regulating plant-microbe symbiotic interactions. It is characterized as inter- kingdom signaling molecule that coordinates various plant and rhizobacterial activities. Thus, understanding the nature and interacting behaviors of these molecules would lead to the exploitation of plant growth-promoting rhizobacteria for better plant growth in agricultural fields.

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Unraveling the secrets of rhizobacteria signaling in rhizosphere

Cited by 17 publications

References 167 publications

Optimizing Crop Production with Bacterial Inputs: Insights into Chemical Dialogue between Sphingomonas sediminicola and Pisum sativum

Optimizing Crop Production with Bacterial Inputs: Insights into Chemical Dialogue between Sphingomonas sediminicola and Pisum sativum

Chemically Mediated Plant–Plant Interactions: Allelopathy and Allelobiosis

Bacterial Symbiotic Signaling in Modulating Plant-Rhizobacterial Interactions

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