Embryogenesis, Ontomorphogenesis, and Seasonal Development of Nelumbo komarovii Grossh. (Nelumbonaceae) from Muravyov-Amursky Peninsula

• Published in: Russian journal of developmental biology Vol. 55; no. 2; pp. 85 - 97
• Main Authors: Khrolenko, Yu. A., Gorpenchenko, T. Yu, Yatsunskaya, M. S., Bezdeleva, T. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-04-2024; Springer Nature B.V
• Subjects: Animal Anatomy; Biomedical and Life Sciences; Developmental Biology; Developmental stages; Embryogenesis; Histology; Life Sciences; Morphogenesis; Morphology; Nelumbo; Original Research; Pollen; Propagation; Rosette; Shoots; ontomorphogenesis; seasonal dynamics; embryogenesis; generative shoot
• ISSN: 1062-3604; 1608-3326
• DOI: 10.1134/S1062360424700085

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.