Fauth_1998_Plant.Physiol_117_1373

Reference

Title : Cutin monomers and surface wax constituents elicit H2O2 in conditioned cucumber hypocotyl segments and enhance the activity of other H2O2 elicitors - Fauth_1998_Plant.Physiol_117_1373
Author(s) : Fauth M , Schweizer P , Buchala A , Markstadter C , Riederer M , Kato T , Kauss H
Ref : Plant Physiol , 117 :1373 , 1998
Abstract :

Hypocotyls from etiolated cucumber (Cucumis sativus L.) seedlings were gently abraded at their epidermal surface and cut segments were conditioned to develop competence for H2O2 elicitation. Alkaline hydrolysates of cutin from cucumber, tomato, and apple elicited H2O2 in such conditioned segments. The most active constituent of cucumber cutin was identified as dodecan-1-ol, a novel cutin monomer capable of forming hydrophobic terminal chains. Additionally, the cutin hydrolysates enhanced the activity of a fungal H2O2 elicitor, similar to cucumber surface wax, which contained newly identified alkan-1,3-diols. The specificity of elicitor and enhancement activity was further elaborated using some pure model compounds. Certain saturated hydroxy fatty acids were potent H2O2 elicitors as well as enhancers. Some unsaturated epoxy and hydroxy fatty acids were also excellent H2O2 elicitors but inhibited the fungal elicitor activity. Short-chain alkanols exhibited good elicitor and enhancer activity, whereas longer-chain alkan-1-ols were barely active. The enhancement effect was also observed for H2O2 elicitation by ergosterol and chitosan. The physiological significance of these observations might be that once the cuticle is degraded by fungal cutinase, the cutin monomers may act as H2O2 elicitors. Corrosion of cutin may also bring surface wax constituents in contact with protoplasts and enhance elicitation.

PubMedSearch : Fauth_1998_Plant.Physiol_117_1373
PubMedID: 9701593

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Citations formats

Fauth M, Schweizer P, Buchala A, Markstadter C, Riederer M, Kato T, Kauss H (1998)
Cutin monomers and surface wax constituents elicit H2O2 in conditioned cucumber hypocotyl segments and enhance the activity of other H2O2 elicitors
Plant Physiol 117 :1373

Fauth M, Schweizer P, Buchala A, Markstadter C, Riederer M, Kato T, Kauss H (1998)
Plant Physiol 117 :1373