Studies of the optical properties of plants in the process of their adaptation to changes in environmental conditions

Abstract

The paper presents the results of experimental studies of the optical properties of plants in the process of their adaptation to changes in environmental conditions. All studies were carried out using the fluorescence method. This method was implemented using an experimental stand (a blue laser diode served as a fluorescence source).
The objects of research were indoor plants - Dracaena (lat. Dracāena). All plants were divided into 2 groups: group 1 - plants grown in natural (sunlight) lighting; Group 2 - plants grown under artificial lighting (LED lamp). The research was carried out for 2 years: in the first year, the optical properties of plants grown under different conditions were studied. In the second year, the optical properties of plants of group 2 were studied in the process of their adaptation to changes in environmental conditions (change of illumination from artificial to natural).
As a result of the experiments, it was found:
- the largest maxima of the fluorescence amplitude are observed in plants grown under artificial lighting, which is apparently due to the high activity of chloroplasts under these conditions compared to the group of samples grown under natural lighting;
- when the illumination of a plant changes, its adaptive properties are triggered, associated with a change in the number of chloroplasts, and, consequently, the concentration of pigments in photosynthetic membranes, which in turn is reflected in a change in the optical properties of plants.
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Elena Timchenko
Samara University
Russia

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