Effect of plant growth promoting rhizobacteria on bacterial canker of tomato

Girish, N; Umesha, S.

doi:10.1080/03235400500094704

Cited by 37 publications

(13 citation statements)

References 23 publications

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“…The increased quantity of total phenol might be attributed to a defense mechanism. Accumulation of phenolics and lignins offers protection against disease and act by strengthening the cell wall and also by releasing anti-microbial compounds (Geetha et al 2005;Girish and Umesha 2005). These results are in line with the results of Meena et al (2008) who reported that total phenol was significantly high in geminivirus infected capsicum leaves.…”

Section: Total Phenolic Contents In Different Tomato Genotypessupporting

confidence: 94%

Time-course analysis of the phenols incucumber mosaicvirus-resistant,-tolerant and -susceptibletomato genotypes

Nazir

Akhtar

Sarwar

et al. 2012

Archives Of Phytopathology And Plant Protection

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In this study, changes in quantity and quality of phenolic compounds were compared in cucumber mosaic virus (CMV)-inoculated and -un-inoculated plants of nine resistant, tolerant, susceptible and highly susceptible genotypes at three different time intervals. Total phenolic contents and the number of phenolic compounds were generally increased in CMV-inoculated plants. Maximum per cent increase in total phenolic contents over un-inoculated controls was observed as 77.55% in resistant genotype TMS-1, 84.17% in tolerant genotype L06238 and 82.88% in resistant genotype L02223 after 10, 20 and 30 days of inoculation, respectively. Thin layer chromatography of inoculated and un-inoculated plants indicates that in most of the tested genotypes, the number of phenolic compounds varied from cultivar to cultivar and within the same cultivar, depending upon the status of plants and growth stages. However, the trend of increase in quantity and quality of phenolic compounds in the tested units was not constant to draw a meaningful conclusion.

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Section: Total Phenolic Contents In Different Tomato Genotypessupporting

confidence: 94%

Time-course analysis of the phenols incucumber mosaicvirus-resistant,-tolerant and -susceptibletomato genotypes

Nazir

Akhtar

Sarwar

et al. 2012

Archives Of Phytopathology And Plant Protection

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“…This is the first record of a gradual decline in the incidence of the bacterial canker of greenhouse tomatoes, grown in an open system for several successive years in the same rockwool slabs. Although there are reports (Boudyach et al 2001, Utkhede & Koch 2004, Girish & Umesha 2005 indicating that some isolates of the bacteria belonging to the same species as those used in the present study (Pseudomonas fluorescens, Bacillus amyloliquefaciens, B. subtilis) were strongly antagonistic to the bacterial canker bacterium, none of the microbial treatments evaluated was found to reduce the incidence or severity of the bacterial canker disease. The disappointing results obtained with testing rhizobacterial strains for their ability to suppress the disease, suggest that the selection of rhizosphere bacteria appropriate for the biological control of Cmm should be considered as a long and laborious process.…”

Section: Resultscontrasting

confidence: 38%

“…According to Boudyach et al (2001) 10 of the 178 bacterial strains, isolated from bulk soil, the rhizosphere and rhizoplane of tomato, reduced the Cmm infection totally when applied as a seed treatment followed by a root treatment before transplanting. Girish and Umesha (2005) have shown that some strains of Bacillus subtilis (Ehrenberg) Cohn and B. amyloliquefaciens Fukumoto protected the tomato plants from the bacterial canker. In addition, the rate of reduction in the disease incidence was directly proportional to the amount of increased level of PAL (phenylalanine ammonia lyase) and total phenol content in plants.…”

Section: Introductionmentioning

confidence: 99%

Attempts at Biological Control of Clavibacter michiganensis subsp. michiganensis On Rockwool-Grown Greenhouse Tomatoes

Slusarski¹

2008

Journal of Fruit and Ornamental Plant Research

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Attempts at Biological Control ofClavibacter michiganensissubsp.michiganensisOn Rockwool-Grown Greenhouse TomatoesTwo greenhouse experiments were conducted in which tomato plants artificially inoculated withClavibacter michiganensissubsp.michiganensis(Cmm) were grown in an open rockwool system as spring and autumn crops. Two isolates of the rhizosphere bacteria,Pseudomonas fluorescensstrain PSR21,Pseudomonas reactansstrain GGS14, a commercial biocontrol agent Aqua Bac Plus (Bacillusspp.) and a proprietary disinfectant containing QAC+Chx, applied at weekly intervals, were evaluated for their efficiency in the suppression of the bacterial canker of tomato. All treatments tested revealed to be ineffective in controlling the disease. The introduction ofCmmbacteria into the fresh rockwool in the first year of its usage resulted in a 100% death of tomato plants, whereas following an artificial inoculation of two- and three-year-old rockwool slabs withCmmbacteria dead plants amounted to 70 and 58%, respectively. This indicates that in the re-used rockwool a natural microbial suppressiveness to bacterial canker of tomato might be developed in the root zone.

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“…ISR develops either locally or systemically in response to a pathogen and is associated with an increase in the activity of chitinases, ␤-1,3-glucanases and peroxidases (Van Loon, 1997). Plants possess a range of active defense responses that contribute to resistance against a variety of pathogens and respond to bacterial pathogen attack by activating various responses that are associated with the accumulation of several factors like defense related enzymes and inhibitors that serve to prevent pathogen infection (Girish and Umesha, 2005). Systemic acquired resistance is characteristically associated with accumulation of salicylic acid, enhanced expression of pathogenesis-related proteins and activation of phenylpropanoid pathway, leading to the synthesis of higher phenolic compounds.…”

Section: Introductionmentioning

confidence: 99%

Lactic acid bacteria mediated induction of defense enzymes to enhance the resistance in tomato against Ralstonia solanacearum causing bacterial wilt

Konappa

Malini

Uzma

et al. 2016

Scientia Horticulturae

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a b s t r a c tThe biocontrol agent Lactic acid bacterium (LAB) was used against the bacterial wilt caused by Ralstonia solanacearum. The present investigation focuses on the role of defense related enzymes in imparting resistance to tomato plants against R. solanacearum. The LAB isolate was tested for its ability to induce the production of defense-related enzymes in treated tomato seedlings. Tomato seedlings were raised from LAB pretreated seeds, were challenge inoculated with R. solanacearum, harvested at different time intervals (0-72 h) and assayed for defense enzyme activity. The LAB treated seeds showed increase in germination percentage (6%) and seedling vigour index (259) compared with control. Treatment of tomato seedlings with LAB isolate induced a significant amount of Peroxidase (POX), Polyphenol oxidase (PPO), Phenylalanine ammonialyase (PAL), total phenolics and ␤-1,3-glucanase activities. The activities of PAL, POX, PPO and ␤-1,3-glucanase reached maximum at 24 h, 24 h, 32 h and 24 h respectively after challenge inoculation. Increased accumulation of phenolics was noticed in plants pre-treated with LAB. Native PAGE analyses of POX and PPO were carried out for the time course of enzyme activities and the isoforms of POX and PPO were examined. In field study, ten isolates of R. solanacearum treated plots yielded an average of 32.4-50 kg/m 2 and LAB treated plots an average of 153.5 kg/m 2 . As compared to the control, LAB increased the yield by 15.3% (8.2 kg/m 2 ) and the pathogen infected plants and pre-treated with LAB gave an average of 55% (28.3 kg/m 2 compared to the infected plots). Field experiment results indicated that LAB exhibited 61.1% of disease reduction of bacterial wilt in tomato.

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Effect of plant growth promoting rhizobacteria on bacterial canker of tomato

Cited by 37 publications

References 23 publications

Time-course analysis of the phenols incucumber mosaicvirus-resistant,-tolerant and -susceptibletomato genotypes

Time-course analysis of the phenols incucumber mosaicvirus-resistant,-tolerant and -susceptibletomato genotypes

Attempts at Biological Control of Clavibacter michiganensis subsp. michiganensis On Rockwool-Grown Greenhouse Tomatoes

Lactic acid bacteria mediated induction of defense enzymes to enhance the resistance in tomato against Ralstonia solanacearum causing bacterial wilt

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