Co-aggregation of Pseudomonas fluorescens and Bacillus subtilis in culture and co-colonization in black gram (Vigna mungo L.) roots

Rathi, Nikita; Singh, Sneha; Osbone, Jabez; Babu, Subramanian

doi:10.1016/j.bcab.2015.05.003

Cited by 5 publications

(4 citation statements)

References 21 publications

(16 reference statements)

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“…Many studies have reported the formation of aggregates and flocs can potentially be utilized in the development of formulations for various agricultural practices (Neyra et al 1997 ; Burdman et al 2000 ; Bahat-Samet et al 2004 ; Joe and Sivakumar 2009 ). While aggregation of cells is influenced by various chemical and physical factors, nutrient-limited conditions are well known as the major factor to induce aggregation of microorganisms (Burdman et al 1998 , 2000 ; Joe and Sivakumar 2009 ; Rathi et al 2015 ).…”

Section: Discussionmentioning

confidence: 99%

Assessment of Methylobacterium oryzae CBMB20 aggregates for salt tolerance and plant growth promoting characteristics for bio-inoculant development

et al. 2017

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Salinity is one of the major factors contributing to the loss of crop productivity and thereby impacting livelihood of people in more than 100 countries of the world and the area of land affected by salinity is increasing day by day. This will worsen due to various factors such as drought that might result in high soil salinity. Use of plant growth promoting rhizobacteria is one of the promising eco-friendly strategies for salinity stress management as part of sustainable agricultural practices. However, it requires selecting rhizobacteria with good survivability and adaptation to salt stress. In this study we report aggregation of Methylobacterium oryzae CBMB20 cells grown in media containing high C/N ratio (30:1) than in media containing low C/N ratio (7:1). Aggregated Methylobacterium oryzae CBMB20 cells exhibited enhanced tolerance to UV irradiation, heat, desiccation, different temperature regimes, oxidative stress, starvation and supported higher population in media. Poly-β-hydroxybutyrate accumulation, exopolysaccharide production, proline accumulation and biofilm formation were good at 100 mM salt concentration with good microbial cell hydrophobicity at both 50 and 100 mM than other concentrations. Both the aggregated and non-aggregated cells grown under 0–200 mM salt concentrations produced IAA even at 200 mM salt concentration with a peak at 100 mM concentration with aggregated cells producing significantly higher quantities. ACC deaminase activity was observed in all NaCl concentrations studied with gradual and drastic reduction in aggregated and non-aggregated cells over increased salt concentrations.

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Section: Discussionmentioning

confidence: 99%

Assessment of Methylobacterium oryzae CBMB20 aggregates for salt tolerance and plant growth promoting characteristics for bio-inoculant development

et al. 2017

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“…A literature survey revealed an increasing number of examples where plant inoculation with compatible strains' mixtures of P. fluorescens and plant mutualistic bacteria (Sundaramoorthy and Balabaskar, 2012;Sundaramoorthy and Balabaskar, 2013;Rathi et al, 2015;Kumar et al, 2016;Sharma et al, 2018) or benefi cial fungi including species of Trichoderma (Thilagavathi et al, 2007, Jain et al, 2012Singh et al, 2013aSingh et al, , 2013bSingh et al, , 2014Ruano-Rosa et al, 2014;Thakkar and Saraf, 2015;Chemelrotit et al, 2017;Patel et al, 2017;Yadav et al, 2017;Jambhulkar et al, 2018), Beauveria (Karthiba et al, 2010;Senthilraja et al, 2013), Pochonia (Siddiqui et al, 2003) and Clonostachys (Karlsson et al, 2015) showed better results than inoculation with individual strains or control treatment, under controlled and fi eld conditions. Furthermore, co-inoculation of specifi c Pseudomonas strains that function as mycorrhiza helper bacteria (MHB) in combination with various arbuscular mucorrhiza fungi (AMF) promoted the growth of maize plants in fi eld conditions better than single AM inoculation (Berta et al, 2014).…”

Section: Pseudomonas-based Multistrain Mixturesmentioning

confidence: 99%

Multistrain versus single-strain plant growth promoting microbial inoculants - The compatibility issue

Thomloudi

Tsalgatidou

Douka

et al. 2019

Hellenic Plant Protection Journal

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Summary Plant Growth Promoting Microorganisms or Plant Probiotics (PGPMs) constitute a promising solution for agricultural sustainability. The concept that inoculation of PGPM mixtures may perform better in enhancing agricultural production than single strain application dates back to the discovery of plant growth rhizobacteria (PGPR) and is gaining ground in our days. This shift is highlighted by the increasing number of research publications dealing with the positive impact of microbial mixtures in promoting plant growth, controlling plant pathogens, as well as providing abiotic stress tolerance. The continuous deposition of patents as well as commercially available formulations concerning bioprotective and/or biostimulant multistrain mixtures also underlines this shift. A major issue in engineering an effective and consistent synthetic multistrain mixture appears to be the compatibility of its components. The present review provides a thorough literature survey supporting the view that treatment of plants with compatible multistrain mixtures generally exerts a better effect in plant growth and health than single-strain inoculation. Our study focuses on multistrain mixtures based on Pseudomonas, Bacillus and beneficial fungal strains, while commercial products are also being referred.

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“…We explored two nonmutually exclusive hypotheses that could fit our observation, although other mechanisms such as habitat filtration could also apply. First, some bacteria might alter the host environment for their own establishment, thus facilitating colonization by related bacteria (Bragonzi et al, 2012; Burmølle et al, 2014; Rathi et al, 2015; Shiri et al, 2013). Second, the host immune response might favour a less diverse cloacal microbiome.…”

Section: Discussionmentioning

confidence: 99%

Phylogenetically under‐dispersed gut microbiomes are not correlated with host genomic heterozygosity in a genetically diverse reptile community

Holmes

Gründler

2022

Molecular Ecology

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While key elements of fitness in vertebrate animals are impacted by their microbiomes, the host genetic characteristics that factor into microbiome composition are not fully understood. Here, we correlate host genomic heterozygosity and gut microbiome phylogenetic diversity across a community of reptiles in southwestern New Mexico to test hypotheses about the behaviour of host genes that drive microbiome assembly. We find that microbiome communities are phylogenetically under-dispersed relative to random expectations, and that host heterozygosity is not correlated with microbiome diversity. Our analyses reinforce results from functional genomic work that identify conserved host immune and nonimmune genes as key players in microbiome assembly, rather than gene families that rely on heterozygosity for their function.

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Co-aggregation of Pseudomonas fluorescens and Bacillus subtilis in culture and co-colonization in black gram (Vigna mungo L.) roots

Cited by 5 publications

References 21 publications

Assessment of Methylobacterium oryzae CBMB20 aggregates for salt tolerance and plant growth promoting characteristics for bio-inoculant development

Assessment of Methylobacterium oryzae CBMB20 aggregates for salt tolerance and plant growth promoting characteristics for bio-inoculant development

Multistrain versus single-strain plant growth promoting microbial inoculants - The compatibility issue

Phylogenetically under‐dispersed gut microbiomes are not correlated with host genomic heterozygosity in a genetically diverse reptile community

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