Some Features of Growth of Etiolated Plants in the Aspect of Implementation of Donor-Acceptor Relations
The object of the study was sprouts of spring soft wheat Triticum aestivum L. Cultivation was carried out in a climatic chamber at a temperature of 18 ± 1° C. As a control, plants grown during the photoperiod day / night 16/8 were used. Some features of the growth and development of Triticum aestivum L. plants were revealed under etiolation conditions. It was established that differences in the length of the root system of etiolated and control seedlings are determined by the length of the roots of the upper tier. The first leaf of etiolated plants is characterized by a longer length and duration of growth. The differences in the length of the leaf control and experimental plants are determined by the length of the leaf sheath. It was established that in the absence of light, the length of 2-4 leaves of ten-day plants is reduced by 24-34% compared to the control, the length of the fifth leaf is slightly different, and the sixth - exceeds the control values by 20-58%. The etiolation leads to a change in the functional activity of the apex of the shoot, which is manifested by a change in the initiation time of the sixth and seventh leaves. The analysis of the growth rates of epicotyl, coleoptile, roots and the first leaf has been carried out. It has been established that the relationship between changes of the root-maintenance of etiolated plants and the growth rate of the root system and the coleoptile has a direct character; and the growth rate of the epicotyl, the lamina and the sheath of the first leaf is the reverse.