Abstract
The spherical green alga Volvox consists of several hundred or thousand of somatic cells that undergo terminal differentiation, senescence and death, and a small number of gonidia (asexual reproductive cells) that give rise to the next generation. In the first part of this paper, the ontogenetic diversity of the genus Volvox is briefly considered, as well as the mechanisms of differentiation into the two types of cells mentioned above, which have been thoroughly studied during recent years in Volvox carteri. Then, a detailed critical analysis of the literature and some of my own data on senescence and cell death (mainly in V. carteri and, to a lesser extent, in V. aureus) was carried out, and it was noted that this aspect of Volvox developmental biology has not been sufficiently studied. Some perspectives of further research of the processes of cell death and senescence in representatives of the genus Volvox in a comparative aspect are indicated.
Highlights
The processes of senescence and cell death have been studied in recent years using various model organisms and systems: multicellular animals (Goldsmith, 2015; Brusentsev et al, 2017; Davaapil et al, 2017; Skulachev, M.V. and Skulachev, V.P., 2017; Zhu et al, 2019; etc.), higher plants, unicells, including protists (Gordeeva et al, 2004; Franklin et al, 2006; Deponte, 2008; Kasuba et al, 2015; Bidle, 2016; Durand et al, 2016)
This article first summarizes some of the current data on the developmental biology of Volvox, and presents a discussion of the literature data and some of my own data on cell death and senescence in Volvox
Speaking about senescence and cell death in Volvox, as a rule, the researchers mean the age-related changes in somatic cells during the development of the model species V. carteri
Summary
Abstract—The spherical green alga Volvox consists of several hundred or thousand of somatic cells that undergo terminal differentiation, senescence and death, and a small number of gonidia (asexual reproductive cells) that give rise to the generation. In the first part of this paper, the ontogenetic diversity of the genus Volvox is briefly considered, as well as the mechanisms of differentiation into the two types of cells mentioned above, which have been thoroughly studied during recent years in Volvox carteri. A detailed critical analysis of the literature and some of my own data on senescence and cell death (mainly in V. carteri and, to a lesser extent, in V. aureus) was carried out, and it was noted that this aspect of Volvox developmental biology has not been sufficiently studied. Some perspectives of further research of the processes of cell death and senescence in representatives of the genus Volvox in a comparative aspect are indicated
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