| Autor: |
Khrolenko, Yu. A., Gorpenchenko, T. Yu., Yatsunskaya, M. S., Bezdeleva, T. A. |
| Předmět: |
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| Zdroj: |
Russian Journal of Developmental Biology; Apr2024, Vol. 55 Issue 2, p85-97, 13p |
| Abstrakt: |
The ontomorphogenesis and generative shoot development in Nelumbo komarovii Grossh. were studied. The stages of embryo formation and pollen grain measurement are described. Pollen grain size ranges from 49 to 51 µm. Plants are characterized by the formation of fruits with up to 43 seeds. The embryo development, including the proembryo and embryo stages, is similar to that of other Nelumbo species. During the first year of life, Nelumbo komarovii successively undergoes four phases of morphogenesis: the primary (main) shoot, systems of "main shoot" and anchorage shoots, clump, and tuberous structure. During the second year of life, N. komarovii passes through three phases of development: vegetative assimilating shoot, vegetative-generative shoot, and tuberous structure. The plant is characterized by a monopodial main axis, each growth consists of a rosette and a stolon. At the end of the growing season, shoot swelling and the formation of tuberous structures were observed at the ends of both the main and lateral shoots. As a result of the decay of the shoot regions preceding the tuberous structures, vegetative propagation occurs. The annual and seasonal dynamics of the N. komarovii population in the conditions of the suburbs of Vladivostok and the structure of the underwater parts of plagiotropic shoots and their changes during the growing season are characterized for the first time. It is difficult to trace the end of ontogenesis in N. komarovii due to the high degree of vegetative propagation and the vegetative mobility of the plants. Different points of view on the taxonomy of Nelumbo are discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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