Systemic Acquired Resistance in Canola Is Linked with Pathogenesis-Related Gene Expression and Requires Salicylic Acid

Potlakayala, Shobha; Reed, Darwin W.; Covello, Patrick S.; Fobert, Pierre R.

doi:10.1094/phyto-97-7-0794

Cited by 35 publications

(33 citation statements)

References 34 publications

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“…SA is known to play a central role in defense against biotrophic pathogens by containing their spread with a preventive cell suicide, known as the hypersensitive response. Additionally, SA elicits a long-lasting, induced resistance response to a broad range of invading pathogens, known as systemic acquired resistance (Ross, 1961;Ryals et al, 1996;van Loon et al, 1998;Potlakayala et al, 2007). JA, on the other hand, plays a key role as an elicitor of defense responses to necrotrophic pathogens by initiating SA-independent induced systemic resistance Vijayan et al, 1998) and to herbivores (Halitschke and Baldwin, 2005;De Vos et al, 2006).…”

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confidence: 99%

Different Lepidopteran Elicitors Account for Cross-Talk in Herbivory-Induced Phytohormone Signaling

et al. 2009

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Salicylic acid (SA), jasmonic acid (JA), ethylene (ET), and their interactions mediate plant responses to pathogen and herbivore attack. JA-SA and JA-ET cross-signaling are well studied, but little is known about SA-ET cross-signaling in plant-herbivore interactions. When the specialist herbivore tobacco hornworm (Manduca sexta) attacks Nicotiana attenuata, rapid and transient JA and ET bursts are elicited without significantly altering wound-induced SA levels. In contrast, attack from the generalist beet armyworm (Spodoptera exigua) results in comparatively lower JA and ET bursts, but amplified SA bursts. These phytohormone responses are mimicked when the species' larval oral secretions (OS Se and OS Ms ) are added to puncture wounds. Fatty acid-amino acid conjugates elicit the JA and ET bursts, but not the SA burst. OS Se had enhanced glucose oxidase activity (but not b-glucosidase activity), which was sufficient to elicit the SA burst and attenuate the JA and ET levels. It is known that SA antagonizes JA; glucose oxidase activity and associated hydrogen peroxide also antagonizes the ET burst. We examined the OS Ms -elicited SA burst in plants impaired in their ability to elicit JA (antisense [as]-lox3) and ET (inverted repeat [ir]-aco) bursts and perceive ET (35s-etr1b) after fatty acid-amino acid conjugate elicitation, which revealed that both ET and JA bursts antagonize the SA burst. Treating wild-type plants with ethephone and 1-methylcyclopropane confirmed these results and demonstrated the central role of the ET burst in suppressing the OS Ms -elicited SA burst. By suppressing the SA burst, the ET burst likely facilitates unfettered JA-mediated defense activation in response to herbivores that otherwise would elicit SA.

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confidence: 99%

Different Lepidopteran Elicitors Account for Cross-Talk in Herbivory-Induced Phytohormone Signaling

et al. 2009

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“…Rape/Pseudomonas syrngae pv. maculicola, leptosphaera maculans (Laboratory) [84] Japanese pear/Venturia nashicola (Laboratory) [85] Cowpea/Colletotrichum destructivum (Laboratory) [86] Tobacco/TMV, CMV, Tomato spotted wilt virus (Laboratory) [87,88] Cucumber/Colletotrichum orbiculare, CMV (Laboratory) [85,89] Tobacco/Pseudomonas syringae pv. tabaci, Oidium sp.…”

Section: Pyrazole Thiazole and Thiadiazole Derivativesmentioning

confidence: 99%

“…Citrucula (Field) [83] Rape/Pseudomonas syrngae pv. maculicola, leptosphaera maculans (Laboratory) [84] Japanese pear/Venturia nashicola (Laboratory) [85] Cowpea/Colletotrichum destructivum (Laboratory) [86] Tobacco/TMV, CMV, Tomato spotted wilt virus (Laboratory) [87,88] Cucumber/Colletotrichum orbiculare, CMV (Laboratory) [85,89] Rice/Magnaporthe oryzae (Field) [70] 1,2-benzisothiazolin-3-one-1,1-dioxide (BIT, Saccharin) Rape/Pseudomonas syrngae pv. maculicola, leptosphaera maculans (Laboratory) [84] Japanese pear/Venturia nashicola (Laboratory) [85] Cowpea/Colletotrichum destructivum (Laboratory) [86] Tobacco/TMV, CMV, Tomato spotted wilt virus (Laboratory) [87,88] Cucumber/Colletotrichum orbiculare, CMV (Laboratory) [85,89] Tobacco/TMV (Laboratory) Rape/Pseudomonas syrngae pv.…”

Section: Pyrazole Thiazole and Thiadiazole Derivativesmentioning

confidence: 99%

“…maculicola, leptosphaera maculans (Laboratory) [84] Japanese pear/Venturia nashicola (Laboratory) [85] Cowpea/Colletotrichum destructivum (Laboratory) [86] Tobacco/TMV, CMV, Tomato spotted wilt virus (Laboratory) [87,88] Cucumber/Colletotrichum orbiculare, CMV (Laboratory) [85,89] Rice/Magnaporthe oryzae (Field) [70] 1,2-benzisothiazolin-3-one-1,1-dioxide (BIT, Saccharin) Rape/Pseudomonas syrngae pv. maculicola, leptosphaera maculans (Laboratory) [84] Japanese pear/Venturia nashicola (Laboratory) [85] Cowpea/Colletotrichum destructivum (Laboratory) [86] Tobacco/TMV, CMV, Tomato spotted wilt virus (Laboratory) [87,88] Cucumber/Colletotrichum orbiculare, CMV (Laboratory) [85,89] Tobacco/TMV (Laboratory) Rape/Pseudomonas syrngae pv. maculicola, leptosphaera maculans (Laboratory) [84] Japanese pear/Venturia nashicola (Laboratory) [85] Cowpea/Colletotrichum destructivum (Laboratory) [86] Tobacco/TMV, CMV, Tomato spotted wilt virus (Laboratory) [87,88] Cucumber/Colletotrichum orbiculare, CMV (Laboratory) [85,89] Rice/Xanthomonas oryzae pv.…”

Section: Pyrazole Thiazole and Thiadiazole Derivativesmentioning

confidence: 99%

“…BTH enhanced resistance against the bacterial pathogen Pseudomonas syringae pv. maculicola and the fungal pathogen Leptosphaeria maculans in Brassica napus in SA dependent manner [84]. In Japanese pear, BTH reduced scab disease caused by Venturia nashicola and was correlated with enhancement of several lines of plant defenses, including antioxidant defenses, polygalacturonase-inhibiting proteins (PGIP), MAPK, and leucin-rich repeat Receptor like kinase [85,105,106].…”

Section: N3)nickel(ii) (Nil2(n3)2)mentioning

confidence: 99%

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Functional Analogues of Salicylic Acid and Their Use in Crop Protection

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Functional analogues of salicylic acid are able to activate plant defense responses and provide attractive alternatives to conventional biocidal agrochemicals. However, there are many problems that growers must consider during their use in crop protection, including incomplete disease reduction and the fitness cost for plants. High-throughput screening methods of chemical libraries allowed the identification of new compounds that do not affect plant growth, and whose mechanisms of action are based on priming of plant defenses, rather than on their direct activation. Some of these new compounds may also contribute to the discovery of unknown components of the plant immune system.

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Systemic Acquired Resistance in Canola Is Linked with Pathogenesis-Related Gene Expression and Requires Salicylic Acid

Cited by 35 publications

References 34 publications

Different Lepidopteran Elicitors Account for Cross-Talk in Herbivory-Induced Phytohormone Signaling

Different Lepidopteran Elicitors Account for Cross-Talk in Herbivory-Induced Phytohormone Signaling

Functional Analogues of Salicylic Acid and Their Use in Crop Protection

Crop Disease Management

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