Changes in the essential oil levels and salicylic acid levels in plants Mentha piperita L. in the ontogeny (secondary metabolitas in the mint ontogeny)

Composition of essential oils and content of salicylic acid in the leaves and inflorescences of the Mentha piperita clone, and the two varieties, produced on the basis of M. piperita, Krasnodarskaya 2 and Mitchamskaya, in the vegetative phase, the phase of flowering and in the end of flowering was studied. Found that the yield of essential oils in the vegetative and flowering phases was the most, and salicylic acid reaches a maximum level after flowering. However, revealed the dual change some components of essential oils, having a protective effect, and the salicylic acid during ontogeny under the influence of natural biotic (aphids, leaf-eating insects, fungal infection) and abiotic (temperature, moisture) stress.