Serveur d'exploration Phytophthora

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[Effect of methyljasmononate on induction of late-blight resistance of potatoes using arachidonic acid].

Identifieur interne : 002768 ( Main/Exploration ); précédent : 002767; suivant : 002769

[Effect of methyljasmononate on induction of late-blight resistance of potatoes using arachidonic acid].

Auteurs : L I Il'Inskaia [Russie] ; G I Chalenko ; E A Perekhod ; N G Gerasimova ; O L Ozeretskovskaia

Source :

RBID : pubmed:10780012

Descripteurs français

English descriptors

Abstract

Methyl ester of jasmonic acid (Me-JA) influences the induced resistance of potato tubers to late blight caused by Phytophthora infestans. Treatment of potato tuber disk surface with Me-JA solution or exposure to an atmosphere containing Me-JA vapors (10(-6)-10(-5) M) increased the rate of rishitin biosynthesis induced by arachidonic acid or P. infestans. Methyl jasmonate increased the sensitivity of potato tissue to arachidonic acid. As a result, in the presence of Me-JA, the protective properties of arachidonic acid were observed at lower concentrations than in the absence of Me-JA. In addition, Me-JA reduced the adverse effects of lipoxygenase inhibitors (salicylhydroxamic acid and esculetin) on the induced resistance of potato tubers to late blight. Therefore, the synergistic interaction of Me-JA and biogenic elicitors can be regarded as part of a mechanism of potato defense against diseases.

PubMed: 10780012


Affiliations:


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Le document en format XML

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<term>Acetates (pharmacology)</term>
<term>Arachidonic Acid (pharmacology)</term>
<term>Cyclopentanes (pharmacology)</term>
<term>Oxylipins (MeSH)</term>
<term>Phytophthora (pathogenicity)</term>
<term>Plant Growth Regulators (chemistry)</term>
<term>Plant Growth Regulators (pharmacology)</term>
<term>Solanum tuberosum (microbiology)</term>
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<div type="abstract" xml:lang="en">Methyl ester of jasmonic acid (Me-JA) influences the induced resistance of potato tubers to late blight caused by Phytophthora infestans. Treatment of potato tuber disk surface with Me-JA solution or exposure to an atmosphere containing Me-JA vapors (10(-6)-10(-5) M) increased the rate of rishitin biosynthesis induced by arachidonic acid or P. infestans. Methyl jasmonate increased the sensitivity of potato tissue to arachidonic acid. As a result, in the presence of Me-JA, the protective properties of arachidonic acid were observed at lower concentrations than in the absence of Me-JA. In addition, Me-JA reduced the adverse effects of lipoxygenase inhibitors (salicylhydroxamic acid and esculetin) on the induced resistance of potato tubers to late blight. Therefore, the synergistic interaction of Me-JA and biogenic elicitors can be regarded as part of a mechanism of potato defense against diseases.</div>
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