Hexanoic Acid-Induced Resistance Against Botrytis cinerea in Tomato Plants
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Other documents of the author: Vicedo, Begonya; Flors, Victor; Leyva, María de la O; Finiti, Iván; Kravchuk, Zhana; Real, María Dolores; García Agustín, Pilar; González-Bosch, Carmen
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comunitat-uji-handle2:10234/2508
comunitat-uji-handle3:10234/6999
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http://dx.doi.org/10.1094/MPMI-22-11-1455 |
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Title
Hexanoic Acid-Induced Resistance Against Botrytis cinerea in Tomato PlantsAuthor (s)
Date
2009-11Publisher
The American Phytopathological SocietyISSN
0894-0282Type
info:eu-repo/semantics/articlePublisher version
http://apsjournals.apsnet.org/doi/abs/10.1094/MPMI-22-11-1455Subject
Abstract
We have demonstrated that root treatment with hexanoic acid protects tomato plants against Botrytis cinerea. Hexanoic acid-induced resistance (Hx-IR) was blocked in the jasmonic acid (JA)-insensitive mutant jai1 (a ... [+]
We have demonstrated that root treatment with hexanoic acid protects tomato plants against Botrytis cinerea. Hexanoic acid-induced resistance (Hx-IR) was blocked in the jasmonic acid (JA)-insensitive mutant jai1 (a coi1 homolog) and in the abscisic acid (ABA)-deficient mutant flacca (flc). Upon infection, the LoxD gene as well as the oxylipin 12-oxo-phytodienoic acid and the bioactive molecule JA-Ile were clearly induced in treated plants. However, the basal ABA levels were not altered. Hexanoic acid primed callose deposition against B. cinerea in a cultivar-dependent manner. Treated plants from Ailsa Craig, Moneymaker, and Rheinlands Ruhm showed increased callose deposition but not from Castlemart. Hexanoic acid did not prime callose accumulation in flc plants upon B. cinerea infection; therefore, ABA could act as a positive regulator of Hx-IR by enhancing callose deposition. Furthermore, although hexanoic acid protected the JA-deficient mutant defensless1 (def1), the priming for callose was higher than in the wild type. This suggests a link between JA and callose deposition in tomato. Hence, the obtained results support the idea that callose, oxylipins, and the JA-signaling pathway are involved in Hx-IR against B. cinerea. Moreover our data support the relevance of JA-signaling for basal defense against this necrotroph in tomato. Hexanoic acid also protected against Pseudomonas syringae, indicating a broad-spectrum effect for this new inducer. [-]
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Molecular Plant-Microbe Interactions, 22, 11, p. 1455-1465Rights
© 2009 The American Phytopathological Society
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- CAMN_Articles [566]