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 еtiolation 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.
1. Ivanova L. A., Ivanov L. A., Ronzhina D. A. P’yankov V. I. The change in the leaf mesophyll of plants of different functional types in the shading. Russian Journal of Plant Physiology, 2008, vol. 55, no. 2, pp. 230–239 (in Russian).
2. Briggs W. R. Phototropism: Some history, some puzzles, and a look ahead. Plant Physiology, 2014, vol. 164, pp. 13–23. DOI: https://doi.org/10.1104/pp.113.230573
3. Oguchi R., Hikosaka K., Hirose T. Does the photosynthetic Light-Acclimation Need Change in Leaf Anatomy? Plant Cell Environ, 2003, vol. 26, pp. 505–512.
4. Shevlyagina O. F., Korobko V. V. Infl uence of etiolation on mesophyll structure and leaf growth Triticum aestivum L. World science: problems and innovations: a collection of articles of the XXII International Scientifi c and Practical Conference. In 2 parts. Part 1. Penza, MTSNS “Nauka i Prosveshcheniye”, 2018, pp. 32–35 (in Russian).
5. Kuznetsov V. V., Dmitrieva G. A. Plant Physiology. In 2 vols. 4th ed., rev. and exp. Moscow, Yurayt Publ., 2016, vol. 1. 437 p. (in Russian).
6. Tsybul’ko B. C. Analysis of experimental validity of the basic theories and hypotheses of the biological nature of photoperiodism. Physiology and Biochemistry of Cultivated Plant, 1997, vol. 29, no. 4, pp. 258–264 (in Russian).
7. Kasatkin M. Yu., Stepanov S. A., Strapko A. M. The infl uence of etiolation on the spectral characteristics of the tissues of the epicotyl and coleoptile of wheat. Bulletin of the Botanical Garden of Saratov State University, 2017, vol. 15, no. 1, pp. 50–59 (in Russian).
8. Korobko V. V., Shevlyagina O. F. Features of root system growth of Triticum aestivum L. under the conditions of etiolation. Nauka i obrazovanie: sokhranyaya proshloe, sozdayiem buduschee: sb. st. XVI Mezhdunar. nauch.-prakt. konf.: v 2 ch. [Science and Education: Preserving the Past, Creating the Future: The Collection of Articles XVI International Scientifi c-Practical Conference]. In 2 parts. Part 1. Penza, MTSNS “Nauka i Prosveshcheniye”, 2018, pp. 28–31 (in Russian).
9. Kiriziy D. A. Carbon dioxide gas exchange and redistribution of assimilates in beans at removal of generative organs. Physiology and Biochemistry of Cultivated Plants, 2000, vol. 32, no. 2, pp.106–113 (in Russian).
10. Kiriziy D. A. Infl uence of shading defoliation on photosynthesis and productivity in the system of donoracceptor relations of plant organism. Physiology and Biochemistry of Cultivated Plants, 2003, vol. 35, no. 2, pp. 95–107 (in Russian).
11. Strapko A. M., Kasatkin M. Yu., Stepanov S. A. Light infl uence on morphogenesis wheat. Izv. Saratov Univ. (N. S.), Ser. Chemistry. Biology. Ecology, 2016, vol. 16, iss. 4, pp. 411–414 (in Russian). DOI: https://doi.org/10.18500/1816-9775-2016-16-4-411-414
12. Williams R. F. The shoot apex and leaf growth: a study in quantitative biology. London, New York, Cambrige University Press, 1975. 256 p.
13. Golub N. A. Parameters of the primary root system of winter wheat and the possibility of their use in the evaluation of varieties. In: Physiology of Productivity and Stability of Grain Crops. Collection of Proceedings. Krasnodar, KNISH, 1988, pp. 42–47 (in Russian).
14. Zaharchenko N. A., Kumakov V. A. Duration and sequence of periods for hidden and visible growth of vegetative organs of spring soft wheat escape. Agricultural Biology, 1998, no. 1, pp. 76–85 (in Russian).
15. Korobko V. V., Stepanov S. A., Shcheglova E. K. Plasticity of donor-acceptor relations in the ontogenesis of wheat escape. Regulyatsiya rosta, razvitiya i productivnosti rasteniy: materialy II Mezhdunar. nauch. konf. [Regulation of Plant Growth, Development and Productivity: Proceedings of the II International Scientifi c Conference, Minsk, 5–8 December 2001]. Minsk, Kolorgrad Publ., 2001, pp. 101–102 (in Russian).