Effect of methyl jasmonate on phytoalexins biosynthesis and induced disease resistance to fusarium oxysporumf. sp. vasinfectum in cotton

The effect of methyl jasmonate (MeJA) sprayed on cotton healthy leaves was evaluated in terms of inherent bioactive chemicals induction. The total phenolic content significantly increased after MeJA 5.0 mM treatments compared to the other tested concentrations (0; 2.5; 10; 15; 20 mM). Among the elev...

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Bibliographic Details
Published inInternational Journal of Agronomy
Main Authors Konan, Yao Kouakou Francois, Kouassi, Kan Modeste, Kouakou, Kouakou Laurent, Koffi, Edmond, Kouassi, Koffi Nazaire, Sekou, Diabate, Kone, Mongomake, Kouakou, Tanoh Hilaire
Format Journal Article
LanguageEnglish
Published John Wiley & Sons, Inc 01.01.2014
Subjects
Gossypol
Physiological aspects
Phytoalexin
Plants
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Summary:The effect of methyl jasmonate (MeJA) sprayed on cotton healthy leaves was evaluated in terms of inherent bioactive chemicals induction. The total phenolic content significantly increased after MeJA 5.0 mM treatments compared to the other tested concentrations (0; 2.5; 10; 15; 20 mM). Among the eleven phenolic compounds which were found except for ferulic acid, gossypetin, gossypol, 3-p-coumaroylquinic acid, and piceatannol were identified as major phenolic constituents of cotton. Their content also significantly increased after the MeJA treatment. In addition, gossypol increased 64 times compared to the control, in the 5.0 mM MeJA treatment. Furthermore, cichoric acid, chlorogenic acid, and pterostilbene are synthesized de novo in leaves of MeJA-treated plant. Treatment of cotton leaves with MeJA 5.0 mM followed 72 h of incubation hamperedthe expression of Fusarium wilt caused by Fusarium oxysporiumf. sp. vasinfectum (FOV). MeJA efficiency was concentration and incubation time dependent. Disease severity on MeJA-treated leaves was significantly lower as compared to the control. Therefore, the high content of gossypetin, gossypol, 3-p-coumaroylquinic acid, ferulic acid, and piceatannol and the presence of cichoric acid, chlorogenic acid, and pterostilbene in plants treated with MeJA, contrary to the control, are essential to equip the cotton compounds with defences or phytoalexins against FOV.
ISSN:1687-8159