Involvement of secondary metabolites and extracellular lytic enzymes produced by Pseudomonas fluorescens in inhibition of Rhizoctonia solani, the rice sheath blight pathogen

Nagarajkumar, M.; Bhaskaran, R.; Velazhahan, R.

doi:10.1016/j.micres.2004.01.005

Cited by 206 publications

(95 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[6] found 18 isolates of rizobacteria producing CZ/CS ratio approximately 1,11 to 2,50 grown in medium of chitin agar. This was consistent with the finding of [1] that PfMDU3 PfMDU2 isolates capable of producing the enzyme chitinase with clear zone of 2.2 mm wide on a medium containing 0.2% coloidal chitin, and was able to inhibit the mycelial growth of Rhizoctonia solani causing stem rot disease on rice plants in vitro.…”

Section: B Characterization Of Physiology Of Indigenous Rb Isolatessupporting

confidence: 92%

“…Introductions of indigenus rhizobacterial isolates on chilli seeds is an effort to obtain a source of healthy plants to face the complexity of problems by the plants after being transferred to an endemic areas. Mechanisms of induced systemic resistance of plants by bacteria isolates generally involve production of bacterial metabolites such as : hydrogen cyanide (HCN), extracellular lytic enzmes (chitinase), dissolved phosphate [1] and [2] , and to produce indole acetic acid (IAA) growth hormone by bacteria isolates for stimulate plant vigor and more able to resist the attack of pathogens [2]. Until now there have not been a report on the ability of indigenous rhizobacterial isolates to control anthracnose disease and enhance the growth of chili seedlings, physiological responses of induced systemic resistance of chilli plants and morphological, physiological and molecular characterization.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization of Indigenous Rhizobacterial Isolates from Healthy Chilli Rhizosphere Capable of Inducing Resistance Against Anthracnose Disease (Colletotrichum Gloeosporioides).

Fatimah¹,

Habazar²,

Аrbаin³

et al. 2014

International Journal on Advanced Science, Engineering and Information Technology

View full text Add to dashboard Cite

Abstract-Antrachnose disease on chilli caused by Colletotrichum gloeosporioides is difficult to be controlled because the disease can be transmitted through the seeds, and has a high genetic diversity. One of promising alternative control is using biological control agents, such as groups of rhizobacteria. The objective of this research were : to characterize the morphology, physiology and molecular of selected rhizobacterial isolates, which were capable of controlling the anthracnose disease and to enhance the growth and yield chilli. Three rhizobacterial isolates (B1.37, B2.11 and P1.31) were used. These isolates were indentified based on morphology (colony form, elevation, edge, and color), physiology (gram tes, the production of hormone IAA, chitinase enzyme, hydrogen cyanide, and solvents phosphate) and molecular. The isolates were identified by using 16S rRNA sequencing. The results indicated that isolate B1.37 belonged to species of Bacillus cereus strain ML 267, isolate B2.11 belonged to Bacillus cereus strain LH8 and isolate P1.31 belonged to Chryseobacterium gleum strain NBRC 15054.

show abstract

Section: B Characterization Of Physiology Of Indigenous Rb Isolatessupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Characterization of Indigenous Rhizobacterial Isolates from Healthy Chilli Rhizosphere Capable of Inducing Resistance Against Anthracnose Disease (Colletotrichum Gloeosporioides).

Fatimah¹,

Habazar²,

Аrbаin³

et al. 2014

International Journal on Advanced Science, Engineering and Information Technology

View full text Add to dashboard Cite

show abstract

“…Dentre as possibilidades de controle, o químico não se apresenta viável, haja certo que é de difícil execução e alto custo, podendo resultar em contaminações do solo, bem como no surgimento de populações resistentes do patógeno (Nagarajkumar et al, 2004). Assim torna-se essencial a busca por outras formas de controle, sendo o controle biológico uma alternativa viável.…”

Section: Introductionunclassified

Controle biológico da queima-das-bainhas em arroz pela microbiolização de sementes com bactérias antagonistas

Ludwig

Moura

2007

Fitopatol. bras.

View full text Add to dashboard Cite

RESUMOObjetivou-se avaliar o efeito de oito isolados bacterianos pré-selecionados de Pseudomonas synxatha, P. fluorescens, Bacillus subtilis, Bacillus sp. e Stenotrophomonas malthophilia no controle da queima-das-bainhas do arroz, causada por Rhizoctonia solani. Sementes da cultivar El Passo L144 foram imersas em suspensão (A 540 =0,5) de cada um dos isolados e agitadas por 30 min a 10�C. Sementes imersas somente em solução salina e em salina mais fungicida (Carboxin + Thiran) foram utilizadas como testemunhas. Foram semeadas 10 sementes por vaso, em quatro repetições, dispostas em delineamento completamente casualizado. Foram realizados três ensaios, sendo que no primeiro foi possível selecionar três isolados como promissores, com reduções na severidade da doença atingindo 50, 33,3 e 16,7 %, respectivamente. Estes isolados foram utilizados nos ensaios posteriores, instalados em casa de vegetação e conduzidos até o ponto de colheita, onde foi possível observar o efeito biocontrolador propiciado, principalmente, pelo isolado de P. fluorescens DFs223, com reduções significativas na severidade da doença chegando a 88 e 91,7% no segundo e terceiro ensaios respectivamente. Em ambos os ensaios, houve incremento tanto do número de panículas quanto do número de perfilhos e da massa seca de raízes em até 42,8, 81,2 e 113% respectivamente, nas plantas tratadas com o isolado de P. fluorescens DFs223.Palavras-chave adicionais: Rhizoctonia solani, Oryza sativa, biocontrole, rizobactérias. ABSTRACTBiological control of rice sheath blight by microbiolization of seeds with antagonist bacteria Eight pre-selected bacterial strains were evaluated for control of rice sheath blight caused by Rhizoctonia solani, Pseudomonas synxatha, P. fluorescens, Bacillus subtilis, Bacillus sp. and Stenotrophomonas malthopilia. Rice seeds cv. El Passo L144 were treated by immersion in a bacterial suspension (A 540 =0.5) of each isolate under agitation at 10�C for 30 min. Seeds immersed in saline solution and in saline plus fungicide (Carboxin + Thiran) were used as control. Ten seeds per pot were used, in four replications, in a completely randomized design. Three assays were performed, and in the first it was possible to select the three strains which reduced the severity of the disease, reaching 50, 33.3 and 16.7%, respectively. These isolates were used in the two last assays, which were maintained in greenhouse until the harvesting stage, where it was possible to observe the biocontrol effect, mainly by the strain of P. fluorescens DFs223, with significant reduction in the disease severity, reaching 88 and 91.7% in the second and third assays, respectively. There was an increase in the number of panicles, as well as in the number of tillers and dry mass of roots, reaching to 42.8, 81.2 and 113 % respectively, in plants treated with this isolate in both assays.Additional keywords: Rhizoctonia solani, Oryza sativa, biocontrol, rhizobacteria. INTRODUÇÃOA cultura do arroz irrigado (Oryza sativa L.) está sujeita ao ataque de várias doenças. Em quase...

show abstract

“…[44]. Siderophore production is another important trait of PGPR [45,46] and observed the siderophore production in Pseudomonas that exhibited antagonism to plant pathogens such as Fusarium oxysporum and Rhizoctonia solani. In the present study, only isolate DDI(I)1 was able to produce siderophore.…”

Section: Figurementioning

confidence: 99%

Evaluation of Rhizospheric Bacteria from Ocimum sp. as Potential Pgpr

Saharan¹

2015

J Microb Biochem Technol

View full text Add to dashboard Cite

In the present investigation, 24 rhizospheric soil samples of Ocimum sp. were collected from different vicinities of Delhi, Kurukshetra and Haridwar (India). A total of 266 bacterial strains were isolated and screened for in vitro plant growth promoting trait. About 86.46% bacterial isolates showed ammonium production, 89.09% exhibited phosphate solubilization and 87.59% for catalase production whereas only 7.14% showed positive reaction for HCN production. Five isolates viz., CHII(II)K7, CHIII(I)Y6, DDI(I)1, UHI(II)7 and CHII(I)NA4 were found to exhibit maximum number of plant growth promoting traits.

show abstract

Involvement of secondary metabolites and extracellular lytic enzymes produced by Pseudomonas fluorescens in inhibition of Rhizoctonia solani, the rice sheath blight pathogen

Cited by 206 publications

References 37 publications

Characterization of Indigenous Rhizobacterial Isolates from Healthy Chilli Rhizosphere Capable of Inducing Resistance Against Anthracnose Disease (Colletotrichum Gloeosporioides).

Characterization of Indigenous Rhizobacterial Isolates from Healthy Chilli Rhizosphere Capable of Inducing Resistance Against Anthracnose Disease (Colletotrichum Gloeosporioides).

Controle biológico da queima-das-bainhas em arroz pela microbiolização de sementes com bactérias antagonistas

Evaluation of Rhizospheric Bacteria from Ocimum sp. as Potential Pgpr

Contact Info

Product

Resources

About