Use of an abscisic acid-producing Bradyrhizobium japonicum isolate as biocontrol agent against bacterial wilt disease caused by Ralstonia solanacearum

Chattopadhyay, Pritam; Banerjee, Goutam; Handique, Pratap Jyoti

doi:10.1007/s41348-022-00604-9

Cited by 19 publications

(10 citation statements)

References 30 publications

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“…In the current study, the relative abundance of genus Rhodococcus grew in response to the ABA increase. Simultaneously, the increase of ABA concentration in cultures suppressed the relative abundance of genus Bradyrhizobium , which is known as a natural producer of various phytohormones in the rhizosphere and is capable of inducing an immunity response in plants to protect them from phytopathogens [ 100 , 101 ]. The authors of the current study also noticed the microbiomes from cultures treated with the minimal and maximal concentrations of ABA (1 and 50 μM, respectively) had high relative abundances of PGPB genera, such as Paenibacillus , Dyadobacter, and Brevibacillus , which might increase macronutrient availability and are important elements of host–microbial interactions in plants–rhizosphere and microalgae–phycosphere systems [ 102 , 103 , 104 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of Abscisic Acid on Growth, Fatty Acid Profile, and Pigment Composition of the Chlorophyte Chlorella (Chromochloris) zofingiensis and Its Co-Culture Microbiome

Kozlova

Карташов

Zadneprovskaya

et al. 2023

Life

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Microalga Chlorella (Chromochloris) zofingiensis has been gaining increasing attention of investigators as a potential competitor to Haematococcus pluvialis for astaxanthin and other xanthophylls production. Phytohormones, including abscisic acid (ABA), at concentrations relevant to that in hydroponic wastewater, have proven themselves as strong inductors of microalgae biomass productivity and biosynthesis of valuable molecules. The main goal of this research was to evaluate the influence of phytohormone ABA on the physiology of C. zofingiensis in a non-aseptic batch experiment. Exogenous ABA stimulated C. zofingiensis cell division, biomass production, as well as chlorophyll, carotenoid, and lipid biosynthesis. The relationship between exogenous ABA concentration and the magnitude of the observed effects was non-linear, with the exception of cell growth and biomass production. Fatty acid accumulation and composition depended on the concentration of ABA tested. Exogenous ABA induced spectacular changes in the major components of the culture microbiome of C. zofingiensis. Thus, the abundance of the representatives of the genus Rhodococcus increased drastically with an increase in ABA concentration, whereas the abundance of the representatives of Reyranella and Bradyrhizobium genera declined. The possibilities of exogenous ABA applications for the enhancing of the biomass, carotenoid, and fatty acid productivity of the C. zofingiensis cultures are discussed.

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Section: Discussionmentioning

confidence: 99%

Effect of Abscisic Acid on Growth, Fatty Acid Profile, and Pigment Composition of the Chlorophyte Chlorella (Chromochloris) zofingiensis and Its Co-Culture Microbiome

Kozlova

Карташов

Zadneprovskaya

et al. 2023

Life

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“…18 Chattopadhyay et al isolated Bradyrhizobium japonicum BRC 2485 from the rhizosphere of tomatoes to defend against bacterial wilt and improve stress tolerance. 19 Many factors affect the rate of nitrogen fixation by nitrogenfixing bacteria. For example, nitrogenase is highly sensitive to oxygen, and nitrogen fixation is inhibited in a high-oxygen environment 20 ; CO 2 can promote the growth of nitrogen-fixing bacteria and increase the rate of nitrogen fixation 21 ; and environmental factors such as temperature, precipitation, and nitrogen deposition also cause changes.…”

Section: Introductionmentioning

confidence: 99%

Deciphering Microbial Community and Nitrogen Fixation in the Legume Rhizosphere

Yang,

Xu,

Zhang

et al. 2024

J. Agric. Food Chem.

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Nitrogen is the most limiting factor in crop production. Legumes establish a symbiotic relationship with rhizobia and enhance nitrogen fixation. We analyzed 1,624 rhizosphere 16S rRNA gene samples and 113 rhizosphere metagenomic samples from three typical legumes and three non-legumes. The rhizosphere microbial community of the legumes had low diversity and was enriched with nitrogen-cycling bacteria (Sphingomonadaceae, Xanthobacteraceae, Rhizobiaceae, and Bacillaceae). Furthermore, the rhizosphere microbiota of legumes exhibited a high abundance of nitrogen-fixing genes, reflecting a stronger nitrogen-fixing potential, and Streptomycetaceae and Nocardioidaceae were the predominant nitrogen-fixing bacteria. We also identified helper bacteria and confirmed through metadata analysis and a pot experiment that the synthesis of riboflavin by helper bacteria is the key factor in promoting nitrogen fixation. Our study emphasizes that the construction of synthetic communities of nitrogen-fixing bacteria and helper bacteria is crucial for the development of efficient nitrogen-fixing microbial fertilizers.

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“…This pathogen is designated as the world's deadliest bacterial plant pathogen because of its widerange host specificity (>200 plant species), broad geographical distribution, abundance and Pathogens 2022, 11, 730 2 of 17 persistence in soil, root invasion, tissue-specific tropism, multiplication, and colonization (>10 9 C.F.U. per g fresh weight) in xylem vessels [2,3]. Rs is also considered "quarantine organisms", "bioterrorism", and "double usage agents" by different regulatory authorities in the USA and Europe [4].…”

Section: Introductionmentioning

confidence: 99%

Interrelation between Stress Management and Secretion Systems of Ralstonia solanacearum: An In Silico Assessment

et al. 2022

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Ralstonia solanacearum (Rs), the causative agent of devastating wilt disease in several major and minor economic crops, is considered one of the most destructive bacterial plant pathogens. However, the mechanism(s) by which Rs counteracts host-associated environmental stress is still not clearly elucidated. To investigate possible stress management mechanisms, orthologs of stress-responsive genes in the Rs genome were searched using a reference set of known genes. The genome BLAST approach was used to find the distributions of these orthologs within different Rs strains. BLAST results were first confirmed from the KEGG Genome database and then reconfirmed at the protein level from the UniProt database. The distribution pattern of these stress-responsive factors was explored through multivariate analysis and STRING analysis. STRING analysis of stress-responsive genes in connection with different secretion systems of Rs was also performed. Initially, a total of 28 stress-responsive genes of Rs were confirmed in this study. STRING analysis revealed an additional 7 stress-responsive factors of Rs, leading to the discovery of a total of 35 stress-responsive genes. The segregation pattern of these 35 genes across 110 Rs genomes was found to be almost homogeneous. Increasing interactions of Rs stress factors were observed in six distinct clusters, suggesting six different types of stress responses: membrane stress response (MSR), osmotic stress response (OSR), oxidative stress response (OxSR), nitrosative stress response (NxSR), and DNA damage stress response (DdSR). Moreover, a strong network of these stress responses was observed with type 3 secretion system (T3SS), general secretory proteins (GSPs), and different types of pili (T4P, Tad, and Tat). To the best of our knowledge, this is the first report on overall stress response management by Rs and the potential connection with secretion systems.

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Use of an abscisic acid-producing Bradyrhizobium japonicum isolate as biocontrol agent against bacterial wilt disease caused by Ralstonia solanacearum

Cited by 19 publications

References 30 publications

Effect of Abscisic Acid on Growth, Fatty Acid Profile, and Pigment Composition of the Chlorophyte Chlorella (Chromochloris) zofingiensis and Its Co-Culture Microbiome

Effect of Abscisic Acid on Growth, Fatty Acid Profile, and Pigment Composition of the Chlorophyte Chlorella (Chromochloris) zofingiensis and Its Co-Culture Microbiome

Deciphering Microbial Community and Nitrogen Fixation in the Legume Rhizosphere

Interrelation between Stress Management and Secretion Systems of Ralstonia solanacearum: An In Silico Assessment

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