Acibenzolar-S-methyl induced resistance to Phytophthora capsici in pepper leaves

Baysal, Ömür; Turgut, Cafer; Mao, Guanghua

doi:10.1007/s10535-005-0055-0

Cited by 36 publications

(35 citation statements)

References 30 publications

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“…Different strategies have been used in attempts to dissect the genetic nature of the resistance, to investigate its biochemical and molecular regulation, and to identify the hormonal signalling network involved in the resistance response. A different approach, which has been used to study the regulation of defence against PB, involves the use of biotic and abiotic elicitors to induce systemic resistance in susceptible pepper cultivars (Ahmed et al 2000;Baysal et al 2005). However, despite the efforts to understand the basis of the compatibility between pepper species and P. capsici, the mechanisms by which this pathogen blocks the defence response are not clear.…”

Section: Discussionmentioning

confidence: 99%

“…Indeed, the application of chemicals has been used to study the susceptibility of peppers to PB. Baysal et al (2005) proposed that the activation of defence-related enzymes such as Lphenylalanine ammonia-lyase (PAL), chitinase, and β-1,3-glucanase may contribute to the induction of resistance against P. capsici in C. annuum seedlings that were sprayed with acibenzolar-S-methylbenzo [1,2,3]thiadiazole-7-carbothioic acid-S-methyl ester (ASM). In another report, the exogenous application of DL-β-amino-n-butyric acid (BABA) induced a resistance response to PB in C. annuum (Sunwoo et al 1996).…”

Section: Introductionmentioning

confidence: 99%

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Ethylene, but not salicylic acid or methyl jasmonate, induces a resistance response against Phytophthora capsici in Habanero pepper

et al. 2011

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We sprayed defence-related plant growth regulators (salicylic acid, methyl jasmonate and ethephon) on one-month-old Habanero pepper seedlings cultivated in vitro. Twenty-four hours later, we inoculated the seedlings with a virulent strain of Phytophthora capsici and periodically evaluated the disease symptoms. At the concentrations used, neither salicylic acid nor methyl jasmonate generated a protective effect in the seedlings, which died less than 10 days post inoculation. However, the treatment with 5 mM ethephon delayed or prevented disease symptoms in 30% of the seedlings. Interestingly, blocking the ethylene receptor with a previous application of 300 μM silver nitrate impeded the protective effects of ethephon. This result demonstrated that the plant resistance response required the perception of ethylene. Analysis of transcript populations in ethephon-treated seedlings revealed a direct correlation between survival and the accumulation of PR1, a gene marker of the systemic acquired resistance (SAR). Although the ethephon treatment also modified transcript levels of the plant defensin PDF1.2, a marker of the induced systemic resistance (ISR), in this case the accumulation also occurred when the ethylene receptor was blocked, suggesting a non-specific effect. The ethephon treatment did not modify the expression of NPR1 (a key transcriptional regulator of plant defence). Interestingly, transgenic pepper seedlings overexpressing endogenous PR10 or esterase genes, which are induced by the ET treatment, completely resisted the infection, which corroborated the importance of these genes in the defence response. Our results suggest that ethylene induced a systemic defence response in susceptible seedlings, possibly in an NPR1-independent pathway.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ethylene, but not salicylic acid or methyl jasmonate, induces a resistance response against Phytophthora capsici in Habanero pepper

et al. 2011

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“…There are many studies about the interaction between different plants and P. capsici in order to get cultivars with durable resistance to late blight (Baysal et al 2005, Egea et al 1996, Evers et al 2006. Many agronomical important traits in crop plants exhibit a continuum of phenotypic variation in a segregating population, suggesting that they are under the control of several genes, each of which may account for only a small portion of the existing phenotypic variation.…”

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

Pepper morphological traits related with resistance to Phytophthora capsici

Egea‐Gilabert¹,

Bilotti²,

Requena³

et al. 2008

Biol. plant.

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Inheritance of 10 morphological and quantitative traits related to plant and fruit development and resistance to the pathogen Phytophthora capsici was studied in an intraspecific cross between a non-pungent, susceptible Capsicum annuum parent (cv. Americano) and a wild, pungent and resistant line (Serrano Criollo de Morelos-334). Data were obtained from the segregation of 166 F 2 plants and 50 F 3 plants in four years. Three of the traits analyzed (necrosis length, leaf width and leaf length) exhibited a transgressive segregation. A multiple linear regression analysis was applied in order to establish a relationship between necrosis length and some of the morphological traits measured such as length and width of leaf, length, diameter and mass of fruit, capsaicin content in fruits, and presence of hair on leaves and stems. The results identified a linear dependence between necrosis length (as an inverse measurement of resistance) and leaf width, fruit diameter and hair presence in the stem. Pungency was not related with resistance.

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“…This disease can affect the plant at any stage of development causing damping-off, seedling blight, foliar blight, and wilting followed by plant death. Infection of mature plants materializes as dark, rapidly expanding, water-soaked lesions (Baysal et al, 2005;Candole et al, 2012;Kousik et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Genetic determinants of the defense response of resistant and susceptible pepper (Capsicum annuum) cultivars infected with Phytophthora capsici (Oomycetes; Pythiaceae)

Zhang

Li²,

Gong

et al. 2013

Genet. Mol. Res.

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ABSTRACT. Based on culture isolation and morphological observation blight-infected pepper plants in Shaanxi Province, China, we identified the pathogen causing pepper phytophthora blight as Phytophthora capsici. Varieties that differed in resistance (CM334, PBC602, and B27) were inoculated with this pathogen. The root activity of resistant CM334 variety was the highest while that of susceptible B27 variety was the lowest. Also, significant differences in the activity of POD, PAL, and β-1,3-glucanase were found; there was a positive correlation between disease resistance and activity of these three enzymes. We inhibited mycelial growth and sporangia formation of P. capsici using crude β-1,3-glucanase and PAL enzymes isolated from the resistant variety CM334 after it had been inoculated with P. capsici. These two enzymes had a synergistic effect on inhibition of P. capsici mycelial growth and sporangia formation. Expression of the defensive genes CaPO1, CaBGLU, CaBPR1, and CaRGA in the three varieties was higher in the leaves than in the roots. All three genes were upregulated in infected leaves and roots of the pepper plants, always expressing at higher levels in the resistant cultivar than in the susceptible cultivar, suggesting that the differences in resistance among the pepper genotypes involve differences in the timing and magnitude of the defense response.

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Acibenzolar-S-methyl induced resistance to Phytophthora capsici in pepper leaves

Cited by 36 publications

References 30 publications

Ethylene, but not salicylic acid or methyl jasmonate, induces a resistance response against Phytophthora capsici in Habanero pepper

Ethylene, but not salicylic acid or methyl jasmonate, induces a resistance response against Phytophthora capsici in Habanero pepper

Pepper morphological traits related with resistance to Phytophthora capsici

Genetic determinants of the defense response of resistant and susceptible pepper (Capsicum annuum) cultivars infected with Phytophthora capsici (Oomycetes; Pythiaceae)

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