The programme of the main conference is still under construction, sorry…
|Silvia Pressel. Life Sciences, The Natural History Museum, London.
Key land plant innovations in bryophytes: considerations on homology and evolution
The position of bryophytes as the closest extant relatives of the first land plants has long been widely accepted. However unequivocal affirmation of their order of divergence and whether or not they constitute a monophyletic group remain elusive. The last fifty years have witnessed a succession of hypotheses gaining general acceptance only to be discarded in the light of new evidence. The latest molecular studies now demonstrate strong support for a mosses-liverworts clade, or Setaphyta, with the position of hornworts remaining uncertain and monophyly gaining renewed support. I will explore how current hypotheses on the origin and evolution of key land plant innovations fit into these latest evolutionary scenarios, with a focus on bryophyte stomatal apparatus and fungal associations.
Golden Oldies symposium: “On the life and work of Founding Fathers of bryology today”
The golden jubilee of the International Association of Bryologists (IAB) is a suitable occasion to pay a tribute to those individuals who made outstanding early contributions to bryology and helped shaping the discipline. This symposium will focus on the lives, work and ideas of founders of bryology such as Johannes HEDWIG who first interpreted bryophytes as we understand them today (by Michelle Price), Wilhelm SCHIMPER whose anatomical work on mosses, especially Sphagnum, laid the foundation for our understanding of bryophyte biology (Jeffrey Duckett), Victor BROTHERUS who single-handedly produced the largest overview of the world’s mosses (Timo Koponen), Richard SPRUCE who produced the corner-stone of modern-day hepaticology and tropical bryology (Tamás Pócs), and finally, William SULLIVANT and Leo LESQUEREUX and the dawn of bryology in North America (Bernard Goffinet and Rafael Medina). The effectiveness of international collaboration among bryologists in documenting the global diversity of bryophytes, today more relevant than ever before, was first shown by mid-19th century bryologists in the framework of the Synopsis Hepaticarum and Bryologia Europea projects. We are grateful to these great early scholars; their pioneering work has shed first light on the structure and functioning of the most diverse group of early land plants inhabiting our planet: the bryophytes.
Jill Harrison. School of Biological Sciences, University of Bristol.
The radiation of life on Earth depended on the colonisation of land by plants. Plants’ photosynthetic activity enriched oxygen in the atmosphere, plants made the first soils and plants make food and homes for animals. The greening of the land started by the formation of thin soil crusts growing fungi, lichens and algae, and land plants originated from these algae. The first land plants had a single tiny stem capped in a reproductive structure, as in modern mosses and other bryophytes. In contrast, most of today’s plants have large and elaborate branching forms nourished by vascular transport. My lab’s research aims to identify genes and developmental changes that enabled such vascular plant forms to arise during evolution.
Mitsuyasu Hasebe. Division of Evolutionary Biology, National Institute for Basic Biology.
Tissue and organs are composed of cells, and the development and its evolution reflect the dynamics of cell behavior. However, genetic regulations of cellular characters and mechanisms especially deeply related to the evolution of land plant body plan have not been well studied. Bryophytes are appropriate materials because of its simple organization, feasibility to observe living cells, and its basal position in land plants. In mosses including Physcomitrella patens, development of each organ is initiated from a single stem cell with different characters each other. In this presentation, I will talk (1) induction of reprogramming of differentiated leaf cells to chloronema apical stem cells by AP2/ERF transcription factor STEMIN with chromatin modifications, (2) a potential role of STEMIN induced reprogramming in living under land environment, and (3) regulatory mechanisms of cell division axes in apical stem cells with auxin and its transporter.
To be decided. To be decided.
IUCN red-listing workshop
The IUCN Specialist Group will meet for the IUCN red-listing workshop. Check for the detailed programme at the “IUCN red-listing workshop” tab.