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2017, № 69

UDC: 581.1:57.022:57.045
GSNTI: 34.31.25

Phenolic compounds and products of lipid peroxidation in the responses of plants Lavandula angustifolia L. at low temperature

Plants respond to the action of various unfavorable environmental stresses by structural change of metabolic processes including accumulation of protective compounds of different chemical nature. Phenolic compounds have a significant role in these processes. They, participating in the process of creation of protective respond, have a number of various functions in the plant organism and are deeply involved in redox reactions. Narrow-leaved lavender (Lavandula angustifolia L.) is one of the major essential oil crops, which is commonly grown and cultivated in the southern regions of Russian Federation (the Republic of Crimea, the Krasnodar Territory). Lavender derivatives are in high demand both on international and national (Russian) markets of essential oil production. Provision of sustainablyhigh yields of this crop, as well as obtaining maximum output of high-quality products (lavender essential oil) is impossible without studying the biochemical aspects of the formation of protective response of plants to the action of unfavorable environmental factors, including climatic ones. For this purpose, we studied the peculiarities of accumulation of phenolic compounds and products of lipid peroxidation in lavender plants of four main cultivars: Stepnaya, Rannaya, Sineva, Vdala in the phase of output from the rest. However, it is well demonstrated that the effect of low temperatures results in the reduction of phenolic compounds content in varying degrees in all studied cultivars. At the same time, it was found that climatic conditions of the year and general level of plant metabolism have an impact on the process of accumulation of phenolic compounds and the degree of their use in the context of unfavorable factor. The level of lipid peroxidation products in plant tissues is one of the most labile indicators of their state. Almost any change in external conditions leads to their rapid activation and possible subsequent degradation. The content of products of lipid peroxidation under low-temperature conditions in the studied lavender cultivars varied differently, which can be the demonstration of a protective response to the action of an unfavorable environmental factor. In terms of this indicator cultivar Rannaya performs better among the cultivars that we studied. That allowed us to assume a higher level of stability of the cell membranes of the tissues of this cultivar and, accordingly, its level of resistance to low temperatures.
Keywords: Lavender plant, breeding material, phenolic compounds, lipid peroxidation
DOI: 10.21515/1999-1703-69-111-117

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Authors:

1. Belova Irina Viktorovna, Scientific Research, researcher, FSBIS «Crimean Research Institute of Agriculture».