Small Molecules Involved in Transkingdom Communication between Plants and Rhizobacteria

Ortíz-Castro, Randy; Bucio, José Lpópez

doi:10.1002/9781118297674.ch28

Cited by 6 publications

(8 citation statements)

References 126 publications

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“…Exuded compounds have been shown to attract beneficial microorganisms and influence the structure and diversity of rhizosphere microbiomes that help plants adapt to their environment [ 49 ]. Phenolic compounds are important small signaling molecules exuded by plants [ 49 – 52 ] and are the most widely distributed secondary metabolites in plants as scavengers of excess O 2− , H 2 O 2 , and 1 O 2 [ 53 ]. Their accumulation is thought to be essential for plants to adapt to a terrestrial environment, to be induced by abiotic stresses, and to be a hallmark of plant stress [ 50 , 52 – 62 ].…”

Section: Discussionmentioning

confidence: 99%

“…Phenolic compounds are important small signaling molecules exuded by plants [ 49 – 52 ] and are the most widely distributed secondary metabolites in plants as scavengers of excess O 2− , H 2 O 2 , and 1 O 2 [ 53 ]. Their accumulation is thought to be essential for plants to adapt to a terrestrial environment, to be induced by abiotic stresses, and to be a hallmark of plant stress [ 50 , 52 – 62 ]. Salt-tolerant species often accumulate more flavonoids and phenols than salt-sensitive species, suggesting a relationship between phenolic compounds and salt stress resistance [ 57 ].…”

Section: Discussionmentioning

confidence: 99%

“…Many studies have demonstrated the effect of phenolic compounds on the interactions between plants and microorganisms in the rhizosphere. For example, studies have found that flavonoids and small molecules help to establish a symbiotic relationship between rhizobacteria and plants [ 52 ], and some kinds of phenolic compounds, such as parabens, flavonols, and (iso) flavones, have a positive effect on spore germination and the mycelial growth of AM fungi [ 60 ]. Phenolic compounds exist widely and are essential components of active defense mechanisms in sorghum under biotic and abiotic stress [ 60 – 64 ].…”

Section: Discussionmentioning

confidence: 99%

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Changes in the root-associated bacteria of sorghum are driven by the combined effects of salt and sorghum development

Gao

Cui

Ren

et al. 2021

Environmental Microbiome

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Background Sorghum is an important food staple in the developing world, with the capacity to grow under severe conditions such as salinity, drought, and a limited nutrient supply. As a serious environmental stress, soil salinization can change the composition of rhizosphere soil bacterial communities and induce a series of harm to crops. And the change of rhizospheric microbes play an important role in the response of plants to salt stress. However, the effect of salt stress on the root bacteria of sorghum and interactions between bacteria and sorghum remains poorly understood. Results The purpose of this study was to assess the effect of salt stress on sorghum growth performance and rhizosphere bacterial community structure. Statistical analysis confirmed that low high concentration stress depressed sorghum growth. Further taxonomic analysis revealed that the bacterial community predominantly consisted of phyla Proteobacteria, Actinobacteria, Acidobacteria, Chloroflexi, Bacteroidetes and Firmicutes in sorghum rhizosphere soil. Low salt stress suppressed the development of bacterial diversity less than high salt stress in both bulk soil and planted sorghum soil. Different sorghum development stages in soils with different salt concentrations enriched distinctly different members of the root bacteria. No obviously different effect on bacterial diversity were tested by PERMANOVA analysis between different varieties, but interactions between salt and growth and between salt and variety were detected. The roots of sorghum exuded phenolic compounds that differed among the different varieties and had a significant relationship with rhizospheric bacterial diversity. These results demonstrated that salt and sorghum planting play important roles in restructuring the bacteria in rhizospheric soil. Salinity and sorghum variety interacted to affect bacterial diversity. Conclusions In this paper, we found that salt variability and planting are key factors in shifting bacterial diversity and community. In comparison to bulk soils, soils under planting sorghum with different salt stress levels had a characteristic bacterial environment. Salinity and sorghum variety interacted to affect bacterial diversity. Different sorghum variety with different salt tolerance levels had different responses to salt stress by regulating root exudation. Soil bacterial community responses to salinity and exotic plants could potentially impact the microenvironment to help plants overcome external stressors and promote sorghum growth. While this study observed bacterial responses to combined effects of salt and sorghum development, future studies are needed to understand the interaction among bacteria communities, salinity, and sorghum growth.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Changes in the root-associated bacteria of sorghum are driven by the combined effects of salt and sorghum development

Gao

Cui

Ren

et al. 2021

Environmental Microbiome

View full text Add to dashboard Cite

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“…The first signaling event after stress sensing, common to different stresses, is the modification of intracellular Ca 2+ concentration and the production of secondary signaling molecules and ROS ( Verma et al., 2016 ). The high number of biochemical pathways used by plants to protect themselves from stress activate a wide array of growth regulators and stress signaling molecules ( Müller and Munné-Bosch, 2006 ; Roychoudhury and Aftab, 2021 ); thus, from embryogenesis to senescence, plant development is subjected to regulation, which is primarily mediated by phytohormones ( Castro and Bucio, 2013 ).…”

Section: Plant Growth In a Changing Environmentmentioning

confidence: 99%

A plant’s perception of growth-promoting bacteria and their metabolites

Abou Jaoudé,

Luziatelli,

Ficca

et al. 2024

Front. Plant Sci.

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Many recent studies have highlighted the importance of plant growth-promoting (rhizo)bacteria (PGPR) in supporting plant’s development, particularly under biotic and abiotic stress. Most focus on the plant growth-promoting traits of selected strains and the latter’s effect on plant biomass, root architecture, leaf area, and specific metabolite accumulation. Regarding energy balance, plant growth is the outcome of an input (photosynthesis) and several outputs (i.e., respiration, exudation, shedding, and herbivory), frequently neglected in classical studies on PGPR-plant interaction. Here, we discuss the primary evidence underlying the modifications triggered by PGPR and their metabolites on the plant ecophysiology. We propose to detect PGPR-induced variations in the photosynthetic activity using leaf gas exchange and recommend setting up the correct timing for monitoring plant responses according to the specific objectives of the experiment. This research identifies the challenges and tries to provide future directions to scientists working on PGPR-plant interactions to exploit the potential of microorganisms’ application in improving plant value.

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“…Not only plant hormones but also N-acyl-L homoserine lactone (AHL) from rhizobacteria can control different developmental processes e.g. cell division, cell elongation in Arabidopsis [1]. Burkholderia are example of gram-negative extracellular plant growth promoting rhizobacteria (ePGPR), are present in the rhizosphere outside the root structure of plant [2].…”

Section: Introductionmentioning

confidence: 99%

Molecular Docking Analysis of AHL Molecule on Plant Protein ARR10

Basu¹,

Sarkar²

2015

Advances in Intelligent Systems and Computing

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In rhizosphere Plant Growth Promoting Rhizobacteria (PGPR) produce N-acyl-l-homoserine lactones (AHL) as the quorum-sensing (QS) signals. AHLs can act as trans-kingdom signalling molecules between plants and rhizobacteria and that can regulate plant growth and development. The plant-beneficial PGPR Burkholderia phytofirmans PsJN promotes growth in Arabidopsis thaliana by producing 3-oxo-dodecanoyl homoserine lactone (oxo-C14-HSL) from their quorum-sensing (QS) system. In bacteria, QS system functions by binding AHL to the LuxR-family of sensor/regulator proteins through their response regulator receiver domain. It has been hypothesized that by using similar response domain, Arabidopsis response regulator 10 (ARR10) proteins may act as binding site for 3-oxo-dodecanoyl homoserine lactone. ARRs are involved in cytokinin signalling pathways and thus these types of lactones can regulate growth in Arabidopsis. We prove the binding of oxo-C14-HSL with ARR10 by using molecular docking technique and analysing the docking result.

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Small Molecules Involved in Transkingdom Communication between Plants and Rhizobacteria

Cited by 6 publications

References 126 publications

Changes in the root-associated bacteria of sorghum are driven by the combined effects of salt and sorghum development

Changes in the root-associated bacteria of sorghum are driven by the combined effects of salt and sorghum development

A plant’s perception of growth-promoting bacteria and their metabolites

Molecular Docking Analysis of AHL Molecule on Plant Protein ARR10

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