BIC seminar series “Liam Dolan”
“De novo development of polarity, the first body axis and the stem cell niche in Marchantia polymorpha“
Date: Thursday 7 November 2024
Time: 15:30H
Location: ORION building, room C2035, Wageningen Campus
Host: Elwira Smakowska
Abstract:
The multicellular bodies of plants develop from single cells; the multicellular diploid phase of the plant life cycle develops from a polarised zygote, and the multicellular haploid phase develops from a spore without polarity. Each of these cell types divide to form masses of cells – enclosed embryos and free-living sporelings respectively. These cell masses form meristems, generative centres from which the mature body of the plant develops.
The spore is produced by meiosis and lacks any markers of polarity. Upon germination, the spore polarizes de novo. This polarity orients the first cell division, which is asymmetric and produces a larger cell on apical side and a smaller cell on the basal side. The apical cell functions as a generative cell anad divides while the basal cell terminally differentiates as a rhizoid cell. Preliminary data indicate that light polarises the spore cell and orients the first asymmetric cell division. A stem cell niche develops in cells derived from the apical cell and forms the plant body. Recent data on mechanism that operates during the development of cell polarity and the initiation of the meristem will be presented.
If you are interested in having a discussion with Liam (highly recommended!), please email me (elwira.smakowska-luzan@wur.nl).
I hope to see many of you at this seminar!
Thursday, November 7, 2024
Liam Dolan
WUR – Orion
Bronland 1, Wageningen