Ethylene Modulates the Role of Nonexpressor of Pathogenesis-related Genes1 in Cross Talk between Salicylate and Jasmonate Signaling
| Autor: | Leon Reyes, H.A., Spoel, S.H., de Lange, E.S., Abe, H., Kobayashi, M., Tsuda, S., Millenaar, F.F., Welschen, R.A.M., Ritsema, T., Pieterse, C.M.J., Plant Microbe Interactions, Sub Plant-Microbe Interactions, Dep Biologie |
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| Přispěvatelé: | Plant Microbe Interactions, Sub Plant-Microbe Interactions, Dep Biologie |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
0106 biological sciences
Physiology Endogeny Plant Science 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Transcription (biology) Arabidopsis Botany Taverne Genetics 030304 developmental biology 0303 health sciences biology Jasmonic acid fungi NPR1 biology.organism_classification Cell biology chemistry International Antagonism Salicylic acid 010606 plant biology & botany Hormone |
| Zdroj: | Plant Physiology, 149(4), 1797. American Society of Plant Biologists Leon-Reyes, A, Spoel, S, De Lange, E S, Abe, H, Kobayashi, M, Tsuda, S, Millenaar, F F, Welschen, R A, Ritsema, T & Pieterse, C M J 2009, ' Ethylene modulates the role of NONEXPRESSOR OF PATHOGENESIS-RELATED GENES1 in cross talk between salicylate and jasmonate signaling ', Plant physiology, vol. 149, no. 4, pp. 1797-1809 . https://doi.org/10.1104/pp.108.133926 |
| ISSN: | 0032-0889 |
| DOI: | 10.1104/pp.108.133926 |
| Popis: | The plant hormones salicylic acid (SA), jasmonic acid (JA), and ethylene (ET) play crucial roles in the signaling network that regulates induced defense responses against biotic stresses. Antagonism between SA and JA operates as a mechanism to fine-tune defenses that are activated in response to multiple attackers. In Arabidopsis (Arabidopsis thaliana), NONEXPRESSOR OF PATHOGENESIS-RELATED GENES1 (NPR1) was demonstrated to be required for SA-mediated suppression of JA-dependent defenses. Because ET is known to enhance SA/NPR1-dependent defense responses, we investigated the role of ET in the SA-JA signal interaction. Pharmacological experiments with gaseous ET and the ET precursor 1-aminocyclopropane-1-carboxylic acid showed that ET potentiated SA/NPR1-dependent PATHOGENESIS-RELATED1 transcription, while it rendered the antagonistic effect of SA on methyl jasmonate-induced PDF1.2 and VSP2 expression NPR1 independent. This overriding effect of ET on NPR1 function in SA-JA cross talk was absent in the npr1-1/ein2-1 double mutant, demonstrating that it is mediated via ET signaling. Abiotic and biotic induction of the ET response similarly abolished the NPR1 dependency of the SA-JA signal interaction. Furthermore, JA-dependent resistance against biotic attackers was antagonized by SA in an NPR1-dependent fashion only when the plant-attacker combination did not result in the production of high levels of endogenous ET. Hence, the interaction between ET and NPR1 plays an important modulating role in the fine tuning of the defense signaling network that is activated upon pathogen and insect attack. Our results suggest a model in which ET modulates the NPR1 dependency of SA-JA antagonism, possibly to compensate for enhanced allocation of NPR1 to function in SA-dependent activation of PR genes. |
| Databáze: | OpenAIRE |
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