Ethylene-dependent activity of phenylalanine ammonia-lyase and lignin formation in cucumber roots exposed to phenolic allelochemicals

摘要

Seedling roots of cucumber were subjected to allelochemical stress by treating them with 0.1 mM solutions of ferulic, p-coumaric, p-hydroxbenzoic and vanillic acids. In the experiment the influence of derivatives of cinnamic acid (ferulic and p-coumaric acids) on the activity of phenylalanine ammonia-lyase (E. C. 4.3. 1.5.) (PAL), lignin content, and cucumber root growth was compared to that of benzoic acid (p-hydroxybenzoic and vanillic acids0.