Cross Talk in Defense Signaling

Koornneef, Annemart; Pieterse, Corné M. J.

doi:10.1104/pp.107.112029

Cited by 895 publications

(721 citation statements)

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“…Certain volatiles even might be involved in the resistance of plants to abiotic stress (Behnke et al, 2007), and BTH treatment has been reported to enhance the attractiveness of herbivore-damaged corn seedlings to parasitic wasps (Rostás and Turlings, 2008). The more common pattern, however, appears to be that JA-and SAmediated signaling elicit very different defensive plant responses and that SA signaling suppresses JAmediated defenses (Maleck et al, 2000;Pieterse and Dicke, 2007;Korneef and Pieterse, 2008). The high specificity of the response observed here thus made A, RT-PCR shows an induction of PR-2 by direct BTH treatment (0 h) and a priming effect on this gene, which was strongly expressed 6 and 12 h after P. syringae inoculation (hpi) when plants had already been treated with 0.5 mM BTH.…”

Section: Discussionmentioning

confidence: 97%

“…However, the wound response, the induction of VOCs, the effects of plant growth-promoting rhizobacteria, and even the resistance to necrotrophic pathogens such as B. cinerea and Alternaria brassiccicola are mediated via JA signaling (Wasternack and Parthier, 1997;Pieterse et al, 1998;Schilmiller and Howe, 2005;Francia et al, 2007;Heil, 2008;Heil and Ton, 2008). In contrast, systemic acquired resistance (SAR) to biotrophic pathogens in many plant species is mediated by SA signaling, which increases the expression of phytoalexins and of several PATHOGENESIS-RELATED (PR) proteins (van Loon, 1997;Hammerschmidt and SmithBecker, 1999;Durrant and Dong, 2004) and which usually is thought to act as an antagonist to JA signaling (Maleck et al, 2000;Pieterse and Dicke, 2007;Korneef and Pieterse, 2008). The volatile derivative of SA, methyl salicylate (MeSA), has been proposed as the most likely systemic signal (Park et al, 2007).…”

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confidence: 99%

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Airborne Induction and Priming of Plant Defenses against a Bacterial Pathogen

Heil²,

et al. 2009

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Herbivore-induced plant volatiles affect the systemic response of plants to local damage and hence represent potential plant hormones. These signals can also lead to "plant-plant communication," a defense induction in yet undamaged plants growing close to damaged neighbors. We observed this phenomenon in the context of disease resistance. Lima bean (Phaseolus lunatus) plants in a natural population became more resistant against a bacterial pathogen, Pseudomonas syringae pv syringae, when located close to conspecific neighbors in which systemic acquired resistance to pathogens had been chemically induced with benzothiadiazole (BTH). Airborne disease resistance induction could also be triggered biologically by infection with avirulent P. syringae. Challenge inoculation after exposure to induced and noninduced plants revealed that the air coming from induced plants mainly primed resistance, since expression of PATHOGENESIS-RELATED PROTEIN2 (PR-2) was significantly stronger in exposed than in nonexposed individuals when the plants were subsequently challenged by P. syringae. Among others, the plant-derived volatile nonanal was present in the headspace of BTH-treated plants and significantly enhanced PR-2 expression in the exposed plants, resulting in reduced symptom appearance. Negative effects on growth of BTH-treated plants, which usually occur as a consequence of the high costs of direct resistance induction, were not observed in volatile organic compound-exposed plants. Volatile-mediated priming appears to be a highly attractive means for the tailoring of systemic acquired resistance against plant pathogens.

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Section: Discussionmentioning

confidence: 97%

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confidence: 99%

Airborne Induction and Priming of Plant Defenses against a Bacterial Pathogen

Heil²,

et al. 2009

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“…6C), one possible explanation to this result is that other ET-responsive genes might participate, but were not included in the analysis. Cross-talk between defensesignaling pathways has been well documented [43,44] and is likely to contribute to optimize the defenses depending on the type of challenge. A crosstalk might possibly occur in AsES-induced defenses between SA-and JA-induced genes.…”

Section: Ases Induces Plant Defenses Against B Cinerea Via Sa- Jaanmentioning

confidence: 99%

The novel elicitor AsES triggers a defense response against Botrytis cinerea in Arabidopsis thaliana

et al. 2015

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AsES (Acremonium strictum Elicitor and Subtilisin) is a novel extracellular elicitor protein produced by the avirulent isolate SS71 of the opportunist strawberry fungal pathogen A. strictum. Here we describe the activity of AsES in the plant-pathogen system Arabidopsis thaliana-Botrytis cinerea. We show that AsES renders A. thaliana plants resistant to the necrotrophic pathogen B. cinerea, both locally and systemically and the defense response observed is dose-dependent. Systemic, but not local resistance is dependent on the length of exposure to AsES. The germination of the spores in vitro was not inhibited by AsES, implying that protection to B. cinerea is due to the induction of the plant defenses. These results were further supported by the findings that AsES differentially affects mutants impaired in the response to salicylic acid, jasmonic acid and ethylene, suggesting that AsES triggers the defense response through these three signaling pathways.

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“…The phytohormones SA, jasmonic acid (JA), and ethylene (ET) activate herbivore induced signals via independent, antagonistic, and synergistic pathways and interface with other hormones auxin, abscisic acid (ABA), brassinosteroid (BR), gibberellins (GA), and cytokinin (CK) [25][26][27][28]. Additionally, as part of the defense mechanisms against phloem-feeding insects and other herbivores, plants are known to alter secondary metabolites, glutathione S-transferases (GSTs), peroxidases, and redox homeostasis [19,[29][30][31].…”

Section: Introductionmentioning

confidence: 99%