Control of Wilt and Rot Pathogens of Tomato by Antagonistic Pink Pigmented Facultative Methylotrophic Delftia lacustris and Bacillus spp.

Janahiraman, Veeranan; Anandham, Rangasamy; Kwon, Soon Woo; Sundaram, S. P.; V, PANDI; Krishnamoorthy, Rajagopal; Kim, Kiyoon; Samaddar, Sandipan; Sa, Tongmin

doi:10.3389/fpls.2016.01626

Cited by 33 publications

(15 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ability of Delftia strains to fix atmospheric nitrogen, and produce phytohormones, siderophores, antifungal compounds (heterocyclic N) and 1-aminocyclopropane-1- carboxylate (ACC) deaminase, solubilize phosphate and perform sulfur oxidation, was reported by Banach et al and Brana et al [38,39]. Delftia strains have been reported as plant growth promotors of many plants, including rice, tomato and some legumes [40,41,42,43,44]. Morel et al [40,41] reported that strain Delftia sp.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Endophytic Bacteria Potentially Promote Plant Growth by Synthesizing Different Metabolites and their Phenotypic/Physiological Profiles in the Biolog GEN III MicroPlateTM Test

Woźniak

Gałązka

Tyśkiewicz

et al. 2019

IJMS

View full text Add to dashboard Cite

Endophytic bacteria, as the most promising components of effective, biofertilizers biostimulating and biocontrol preparations, should be very intensively obtained from various plants and studied in terms of the conditions determining the potential ability to promote plant growth. For this reason, endophytic bacteria have been isolated from both stems and roots of up to six systematically distant species of vascular plants: one species belonging to the seedless vascular plants (Monilophyta), and five seed plants (Spermatophyta). The 23 isolated strains represented nine genera: Delftia, Stenotrophomonas, Rhizobium, Brevundimonas, Variovorax, Achromobacter, Novosphingobium, Comamonas and Collimonas, notably which were closely related—belonging to the phylum Proteobacteria. Stenotrophomonas sp. strains showed the greatest ability to synthesize indole-3-acetic acid (IAA)-like compounds, while Achromobacter sp. strains produced the highest levels of siderophores. The presence of the nifH gene and nitrogen binding activity was demonstrated for 95% of the strains tested. Stenotrophomonas maltophila (ES2 strain) showed the highest metabolic activity based on Biolog GEN III test. The ability to solubilize phosphate was determined only for three tested strains from genus: Delftia, Rhizobium and Novosphingobium. The presented work demonstrated that the metabolic and phenotypic properties of plant growth-promoting endophytes are correlated with the genus of bacteria and are not correlated with the host plant species or part of plant (stem, root).

show abstract

Section: Discussionmentioning

confidence: 99%

“…Moreover, strain HR4 also showed a high nitrogen-fixing activity. The potential of bacteria genus Delftia to inhibit the growth of tomato ( Lycopersicon esculentum ) pathogens Fusarium , Sclerotium , Pythium and Rhizoctonia was also noted [44].…”

Section: Discussionmentioning

confidence: 99%

Endophytic Bacteria Potentially Promote Plant Growth by Synthesizing Different Metabolites and their Phenotypic/Physiological Profiles in the Biolog GEN III MicroPlateTM Test

Woźniak

Gałązka

Tyśkiewicz

et al. 2019

IJMS

View full text Add to dashboard Cite

show abstract

“…B. subtilis is a Gram-positive soil bacterium used as a highly efficient biocontrol agent, protecting plants from both fungal and bacterial pathogens (16)(17)(18)(19)(20). This protection is proposed to be mediated by the formation of robust biofilms (7,21) and by the production of a wide range of antibiotics (22) that shape interspecies interactions (23).…”

mentioning

confidence: 99%

The Plant Host Induces Antibiotic Production To Select the Most-Beneficial Colonizers

Ogran

Yardeni

Keren-Paz

et al. 2019

Appl Environ Microbiol

View full text Add to dashboard Cite

Microbial ecosystems tightly associated with a eukaryotic host are widespread in nature. The genetic and metabolic networks of the eukaryotic hosts and the associated microbes have coevolved to form a symbiotic relationship. Both the Gram-positive Bacillus subtilis and the Gram-negative Serratia plymuthica can form biofilms on plant roots and thus can serve as a model system for the study of interspecies interactions in a host-associated ecosystem. We found that B. subtilis biofilms expand collectively and asymmetrically toward S. plymuthica, while expressing a nonribosomal antibiotic bacillaene and an extracellular protease. As a result, B. subtilis biofilms outcompeted S. plymuthica for successful colonization of the host. Strikingly, the plant host was able to enhance the efficiency of this killing by inducing bacillaene synthesis. In turn, B. subtilis biofilms increased the resistance of the plant host to pathogens. These results provide an example of how plant-bacterium symbiosis promotes the immune response of the plant host and the fitness of the associated bacteria. IMPORTANCE Our study sheds mechanistic light on how multicellular biofilm units compete to successfully colonize a eukaryote host, using B. subtilis microbial communities as our lens. The microbiota and its interactions with its host play various roles in the development and prevention of diseases. Using competing beneficial biofilms that are essential microbiota members on the plant host, we found that B. subtilis biofilms activate collective migration to capture their prey, followed by nonribosomal antibiotic synthesis. Plant hosts increase the efficiency of antibiotic production by B. subtilis biofilms, as they activate the synthesis of polyketides; therefore, our study provides evidence of a mechanism by which the host can indirectly select for beneficial microbiota members.on July 10, 2020 by guest http://aem.asm.org/ Downloaded from RESULTSB. subtilis biofilm actively expands toward a competing S. plymuthica colony. When grown on a solid biofilm-inducing medium, B. sutbilis biofilms form symmetrical, circular colonies. To determine the effect of a competing S. plymuthica colony on the development of a B. subtilis biofilm, the two species were inoculated next to each other on a solid biofilm medium. After 2 days, the B. subtilis colony reached S. plymuthica, forming a thick wrinkle around its edge and penetrating toward its center. By the third day, B. subtilis biofilm completely engulfed the S. plymuthica colony, covering it with a thin, unstructured film and enclosing it within the circular wrinkle (Fig. 1A). The location and shape of the B. subtilis center of the biofilm did not change during the interaction with S. plymuthica. However, the biofilm colony advanced asymmetrically toward the S. plymuthica colony, breaking from its usual circular shape ( Fig. 1A).We next examined the mechanisms that could mediate this asymmetric expansion toward a competitor. Many bacterial cells are capable of directional swimming using their flagella (2...

show abstract

“…lacustris were detected, and others similar to S. maltophilia were detected in wheat rhizosphere. D. lacustris (methylotrophic isolate) showed direct antifungal properties, while its antibacterial potential may be attributed to volatile inhibitory compounds and/or induction of systemic resistance (ISR) (Janahiraman et al 2016). The pathogen was undetectable in the second-year corn soil and rhizosphere, which coincided with an increase in oligotrophic bacteria along with the detection of a new strain similar to Beijerinckia fluminensis in corn soil.…”

Section: Pathogen Density In Different Habitats Before and After Planmentioning

confidence: 99%

Microbial biodiversity as related to crop succession and potato intercropping for management of brown rot disease

Messiha

Elhalag

Balabel

et al. 2019

Egypt J Biol Pest Control

View full text Add to dashboard Cite

Potato brown rot, caused by Ralstonia solanacearum, ranked globally as the second most important bacterial plant pathogen. In the present study, the influence of different cropping programs in potato brown rot management was investigated in four infected fields in Egypt. Two districts were selected as sandy soils in Giza (Wardan) and Behera (Ganuob El-Tahrir) governorates. The other two were selected as silty clay in Minufyia (Talia) and Beni-Suef (Sids) governorates. The followed crop succession included corn, potato intercropped with cabbage, onion, cowpea, wheat, corn again, and ended by potato. The pathogen was undetectable after corn, onion, and wheat. It decreased in cowpea and cabbage rhizospheres in the clay soils. The pathogen was undetectable at all districts, except at Sids, where the pathogen was significantly decreased but was not eradicated. This was possibly attributed to the high ratio of NO 3 − and Na + at this district. Decreased R. solanacearum density after corn coincided with the high ratio of fluorescent pseudomonads, endospores, and actinomycetes, being most clear in the poor soils (Wardan) and less clear under iron excess at Ganoub El-Tahrir as well as the clay soils. Corn rhizosphere supported an array of antagonistic actinomycetes such as strains similar to Streptomyces intermedius, Streptomyces albidoflavus group, Streptomyces argenteolus group, and Streptomyces erythrogriseus. Intercropping potato with cabbage decreased the density of the pathogen in rhizosphere, which is associated with greater antagonistic fluorescent pseudomonads, Bacillus spp. and Serratia spp. Onion soil and rhizosphere associated with abundance of antagonists and fluorescent pseudomonads, followed by S. maltophilia and Bacillus spp. Wheat soil and rhizosphere supported fluorescent pseudomonads and antagonistic Streptomyces spp., especially in sandy soils. The pathogen was undetectable after planting the ending potato in the three districts, Wardan, Ganoub El-Tahrir, and Talia. This was accompanied by a general oligotrophism and increased ratio of fluorescent pseudomonads, endospores bacteria, and actinomycetes along with a diversity of R. solanacearum antagonists such as S. maltophilia, Citrobacter freundii, Acinetobacter sp., Delftia sp., and Serratia marcescens.

show abstract

Control of Wilt and Rot Pathogens of Tomato by Antagonistic Pink Pigmented Facultative Methylotrophic Delftia lacustris and Bacillus spp.

Cited by 33 publications

References 41 publications

Endophytic Bacteria Potentially Promote Plant Growth by Synthesizing Different Metabolites and their Phenotypic/Physiological Profiles in the Biolog GEN III MicroPlateTM Test

Endophytic Bacteria Potentially Promote Plant Growth by Synthesizing Different Metabolites and their Phenotypic/Physiological Profiles in the Biolog GEN III MicroPlateTM Test

The Plant Host Induces Antibiotic Production To Select the Most-Beneficial Colonizers

Microbial biodiversity as related to crop succession and potato intercropping for management of brown rot disease

Contact Info

Product

Resources

About