Vol. 117: 1373–1380, 1998
Fauth, M., Schweizer, P., Buchala, A., Markstädter, C., Riederer, M., Kato, T., Kauss, H. Cutin Monomers and Surface Wax Constituents Elicit H2O2 in Conditioned Cucumber Hypocotyl Segments and Enhance the Activity of Other H2O2 Elicitors.
In the above publication, we reported that alkaline hydrolysates of cucumber (Cucumis satiuns) cutin preparations contain, in addition to hydroxy fatty acids, dodecan-1-ol (DDO). During recent re-examination, we could find only traccs of DDO and showed that it formerly resulted from an impurity. Thus, the conclusion that DDO represents an esterified component of cucumber cutin was an error.
This notion does not devaluate the observation that freshly abraded cucumber hypocotyls are able to produce H2O2 from DDO and other primary fatty alcohols (H. Kauss, M. Fauth, A. Merten, W. Jeblick [1999] Plant Physiol 120: 1175–1182). The respective enzyme system is constitutive; its natural substrate and physiological role remain unknown. In addition, these fatty alcohols can also stimulate an inducible H2O2-generating system involving NAD(P)H oxidase and thus act in this respect similar to other elicitors, including hydroxy fatty acids (classical cutin monomers).