Abstract Detail



Green Land: Multiple Perspectives on Green Algal Evolution and the Earliest Land Plants

Bowman, John L. [1], Dierschke, Tom [1], Flores-Sandoval, Eduardo [2].

Evolution in the cycles of life.

The life cycles of eukaryotes alternate between haploid and diploid phases, initiated by meiosis and gamete fusion, respectively. In phylogenetically diverse unicellular eukaryotes, expression of paralogous homeodomain genes in the two gametes directs the haploid-to-diploid transition in gene expression. In land plants complex multicellular bodies are produced in both phases: the diploid sporophyte produces spores via meiosis and the haploid gametophyte differentiates gametes, eggs and sperm. As in unicellular eukaryotes, a TALE class homeodomain of the KNOX subfamily has been implicated in the haploid-to-diploid transition the moss Physcomitrella, and further that KNOX activity may be contributed to the zygote via the egg. We will report on our results using the liverwort Marchantia polymorpha as a model system to investigate the genetic regulation of the alternation of generations in land plants.


1 - Monash University, Melbourne, VIctoria, 3800, Australia
2 - Monash University, Melboune, Victoria, 3800, Australia

Keywords:
Marchantia
alternation of generations
TALE homeodomain.

Presentation Type: Symposium Presentation
Number: 0008
Abstract ID:121
Candidate for Awards:None


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