Vestnik of Orenburg State Pedagogical University. Electronic Scientific Journal. 2022. № 1(41). P. 49—57
BIOLOGICAL SCIENCES
UDC 581.522.4(571.1):635.965.282.6
Sedelnikova Lyudmila Leonidovna, Doctor of Biological Sciences, Senior research fellow
Central Siberian Botanical garden of the Siberian branch of the Russian Academy of Sciences
ONTOMORPHOGENESIS OF Tritonia deusta (IRIDACEAE)
Abstract
For the first time in the conditions of the forest-steppe zone of Western Siberia, a study of the ontogenesis, seasonal development, flowering, vegetative and seed reproduction of Tritonia deusta (Aiton) Ker Gawl (genus Tritonia Ker-Gawl., sem. Iridaceae Juss.) was carried out. The results of ontogenesis were analyzed and it was found that the pregenerative period in T. deusta is short and amounts to two years. Plants have five age states, three of them in the first year of development (seedling, juvenile, immature), in the second — virginal. In the third year, the generative period begins, and the first year of flowering is characterized by a young generative state. The flowers bloom strictly in the acropetal direction. The flowers showed the presence of self-pollination (autogamy and geitonogamy) and cross-pollination. Fruit formation within one generative shoot occurs annually, and 16—20 boxes are developed. The average number of seeds in an inflorescence is 96.0±0.5 pcs. Their germination rate is 90—95%. Seeds crescent-shaped and cone-shaped. The studied species goes through all the phenophases of development from regrowth to fruiting, the formation of corms and tubers during the growing season of 112—115 days. According to the phenorhythmotype, T. deusta belongs to long-term vegetative, summer-autumn-blooming, wintering and tuberous geophytes. The generative organs of a monocarpic shoot are laid during its vegetation season, which dies off by autumn. The corms overwinter with a renewal shoot in a vegetative-rudimentary state. The formation of underground plagiotropic shoots in corms was noted, which is associated with vegetative-mobile morphological disintegration and the development of vegetative clones. Vegetative reproduction, seed formation, and good ex situ adaptability expand the possibility for widespread use of rare and less common in ornamental floriculture corm plants, such as T. deusta, in the forest-steppe zone of Western Siberia.
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Bibliography link to this article:
Sedelnikova L. L. Ontomorphogenesis of Tritonia deusta (Iridaceae). Vestnik of Orenburg State Pedagogical University. Electronic Scientific Journal, 2022, no. 1 (41), pp. 49—57. DOI: https://doi.org/10.32516/2303-9922.2022.41.5.