Endophytic bacteria mediate plant resistance against cotton bollworm

Rajendran, L.; Samiyappan, R.; Raguchander, T.; Saravanakumar, Duraisamy

doi:10.1080/17429140701420003

Cited by 36 publications

(19 citation statements)

References 27 publications

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“…The role of PPO in disease resistance is to oxidize phenolic compounds to quinines, which are often more toxic to microorganisms than the original phenols; the enzyme itself is inhibitory to viruses by inactivating the RNA of the virus (Vidhyasekaran 1988a, b). Recently, Rajendran et al (2007) demonstrated the endophytic behaviour of Bacillus and Pseudomonas strains that mediates the disease resistance in crop plants against plant pathogens. Similar to previous studies, P. fluorescens strain CHA0 alone and in combination with chitin-mediated induction of PPO in banana plantlets might account for the reduction of BBTD in the current study.…”

Section: Discussionmentioning

confidence: 99%

Induction of systemic resistance in banana (Musa spp.) against Banana bunchy top virus (BBTV) by combining chitin with root-colonizing Pseudomonas fluorescens strain CHA0

et al. 2007

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Pseudomonas fluorescens strains CHA0 and Pf1 were investigated for their biocontrol efficacy against Banana bunchy top virus (BBTV) in banana (Musa spp.) alone and in combination with chitin under glasshouse and field conditions. Bioformulation of P. fluorescens strain CHA0 with chitin was effective in reducing the banana bunchy top disease (BBTD) incidence in banana under glasshouse and field conditions. In addition to disease control, the bioformulation increased the economic yield significantly compared to the untreated control. Increased accumulation of oxidative enzymes, peroxidase (PO), polyphenol oxidase (PPO), phenylalanine ammonia lyase (PAL), pathogenesis-related (PR) proteins, chitinase, beta-1,3-glucanase and phenolics were observed in CHA0 bioformulation amended with chitin-treated plants challenged with BBTV under glasshouse conditions. Indirect ELISA indicated the reduction in viral antigen concentration in P. fluorescens strain CHA0 with chitin-treated banana plants corresponding to reduced disease ratings. The present study revealed that induction of defence enzymes by P. fluorescens with chitin amendment reduced the BBTD incidence and increased bunch yield in banana

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Section: Discussionmentioning

confidence: 99%

Induction of systemic resistance in banana (Musa spp.) against Banana bunchy top virus (BBTV) by combining chitin with root-colonizing Pseudomonas fluorescens strain CHA0

et al. 2007

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“…Phytohormones like SA are able to regulate symbiosis and mediate ISR prompted by useful microbes in the interactions between plants and non-pathogenic rhizosphere microbes (De Vleesschauwer and Höfte, 2009; Zamioudis and Pieterse, 2012). Similarly, some PGPR-induced biochemical alterations prompt ISR in plants against herbivorous insects (Rajendran et al, 2007;van de Mortel et al, 2012;Wielkopolan and Obrepalska-Steplowska, 2016;Zebelo et al, 2016). Fahimi et al (2014) showed that the application of P. fluorescens strains UTPF68 and PF169 on cucumber led to a decrease in the average number of progeny produced by A. gossypii adults.…”

Section: Discussionmentioning

confidence: 99%

Induction of resistance againstBrevicoryne brassicaebyPseudomonas putidaand salicylic acid in canola

Khoshfarman-Borji

Yali

Bozorg-Amirkalaee

2020

Bull. Entomol. Res.

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The cabbage aphid, Brevicoryne brassicae L. (Hem: Aphididae), is one of the most serious pests of canola worldwide. In this research, the effects of Pseudomonas putida, salicylic acid (SA), and integrated application of both inducers were studied on the resistance of canola to B. brassicae. In free-choice situation, the number of B. brassicae attracted on canola plants under treatments containing P. putida and SA was significantly lower compared to control plants. In the life table study, pre-adult survival, longevity, reproductive period, and fecundity of this aphid were lowest on plants treated with P. putida + SA. The net reproductive rate (R0), intrinsic rate of population increase (r), and finite rate of increase (λ) of B. brassicae decreased significantly in the following order: control (47.19 offspring, 0.293 and 1.340 day−1), P. putida (16.7 offspring, 0.238 and 1.269 day−1), SA (6.37 offspring, 0.163 and 1.178 day−1), and P. putida + SA (3.24 offspring, 0.112 and 1.119 day−1). Moreover, the beneficial effect of the integrated application of P. putida and SA on plant growth parameters was significantly evident in our study. The highest values of glucosinolates, total phenol, and flavonoids were recorded in P. putida + SA treatment. We concluded that canola plants treated with P. putida + SA are more resistant to the cabbage aphid. These findings demonstrated that SA integrated with P. putida on canola plants act effectively for reducing the population of B. brassicae and can be used in integrated management programs of this pest.

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“…Limited information is available on such studies, especially in rice. The talc-based formulation containing beneficial microbes was found to be effective and cheaper for pests and diseases in different crops Rajendran et al 2007;Kavino et al 2007;Radjacommare et al 2002). Hence, the present study was carried out with the objectives of (i) isolation of effective Beauveria and in vitro bioassay against the rice leaffolder and (ii) Trying the talc-based powder formulation containing Beauveria strain and evaluating its efficacy against leaffolder under greenhouse conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of talc-formulated entomopathogenic fungus Beauveria against leaffolder (Cnaphalocrosis medinalis) in rice

Sivasundaram

Rajendran

Muthumeena

et al. 2007

World J Microbiol Biotechnol

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Thirteen Beauveria strains were isolated from the soil and infected insects. Among the various isolates, B 2 isolate (Arachalore) showed a higher percentage of mortality against C. medinalis (73.3%) under in vitro conditions. Conidial concentration of 1 9 10 8 of the B2 strain registered maximum mortality of 76.7%. The least LT 50 value of 4.4 days was registered in B2 isolate with the spore concentration of 1 9 10 8 and the LC 50 value was 3.4 9 10 4 . Beauveria strains altered the feeding behavior of C. medinalis, reduced the pupal weight, prolonged the pupation period, malformed the pupa and adult under in vitro. The efficacy of the talc-based bioformulation of Beauveria (B2) strain was tested as seed treatment + seedling dip + soil application + foliar spray against rice leaffolder under in vitro and greenhouse conditions. The percentage damage was significantly less (5.5) in B2 as compared to untreated healthy control (25.8). In addition, the same treatment increased the activities of defenserelated enzymes, namely peroxidase, polyphenol oxidase, phenylalanine ammonia-lyase, chitinase, and phenolics in rice.

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Endophytic bacteria mediate plant resistance against cotton bollworm

Cited by 36 publications

References 27 publications

Induction of systemic resistance in banana (Musa spp.) against Banana bunchy top virus (BBTV) by combining chitin with root-colonizing Pseudomonas fluorescens strain CHA0

Induction of systemic resistance in banana (Musa spp.) against Banana bunchy top virus (BBTV) by combining chitin with root-colonizing Pseudomonas fluorescens strain CHA0

Induction of resistance againstBrevicoryne brassicaebyPseudomonas putidaand salicylic acid in canola

Effect of talc-formulated entomopathogenic fungus Beauveria against leaffolder (Cnaphalocrosis medinalis) in rice

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