Scientific journal
Scientific Review. Biological science
ISSN 2500-3399
ПИ №ФС77-57454

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BIOCHEMICAL FEATURES CONSTITUTIVE RESISTANCE OF BIRCH (BETULA PENDULA ROTH.) TO INSECT-PHYLLOPHAGOUS DAMAGE IN ANTHROPOGENIC INFLUENCE

Koltunov E.V. 1 Yakovleva M.I. 1
1 Botanical Garden Ural Department of Russian Academy of sciences
The study of the biochemical factors of natural (constitutive) entomoresistance from the leaves of birch from the gypsy moth outbreaks and their boundaries. Chromatographic analysis (HPLC) identified 51-54 different compounds. There is a significant domination of fractions with a significant increase in the content of phenolic compounds in peak (38.9%) in samples beyond the borders of outbreaks compared with the control (in the outbreaks). They include flavonoids, phenolic glycosides, phenol carbonic acids. At the composition of phenolic glycosides identified arbutin and salicin, which can be considered as components of the constitutive entomoresistance, due to their high antifeedant activity. Neutral reaction was observed in 33,3%. Reduction of phenolic compounds found in only 27,8% of the peaks. Increasing of phenolic glycosides the content such as arbutin and salicin can be uniquely regarded as an argument in favor of a higher level of constitutive entomoresistance in plantations beyond the borders of outbreaks. Furthermore, one can assume that other phenolic compounds, the content of which is significantly higher than in samples from outbreaks may exhibit antifeedant properties. It is assumed that certain phenolic compounds can participate in the implementation of constitutive (natural) entomoresistance and induced resistance