Abstract
Epigenetic Clues to Better Understanding of the Asexual Embryogenesis in planta and in vitro
Highlights
- One of most intriguing questions in developmental plant biology, is how the cellular totipotency is generated, and results in the asexual embryogenesis
- Hormonal and stress signals play a key role in initiation of the embryogenic pathway by activation of cell division in somatic cells in planta and in in vitro cultured cells
- Level of DNA methylation in dedifferentiated callus tissues is lowered during embryogenesis. - Epigenetic reprogramming is reflected by significant changes in transcript profiles during callus induction and somatic embryogenesis
Summary
Formation of numerous buds and small plantlets on leaf margin of Kalanchoe daigremontiana is a peculiar developmental event in the plant kingdom (Figure 1A, Garcês et al, 2007). These organogenic or embryogenic processes start with cell divisions as responses to wounding or hormonal signals (Stage I) shown by Figure 1B (Guo et al, 2015; Zhu, 2017). In both cases (in Daucus: Grzebelus et al, 2012; Kalanchoe: Guo et al, 2015) hormonal and stress factors are involved in induction of cell division and cellular re-programming. Another plant species Rhynia gwynne-vaughanii was found to be capable for plant regeneration in planta (Kearney et al, 2016)
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