08.01.2020: Botanisches Kolloquium "Evolution of C4 and CAM photosynthesis"

Das Institut für Botanik lädt zum Vortrag im Rahmen des Botanischen Kolloquiums WS 2019/2020 ein:

"Evolution of C4 and CAM photosynthesis"
Prof. Dr. Gudrun Kadereit, Universität Mainz

08.01.2020 17:00 Uhr
Hörsaal A
Institut für Botanik, Sternwartestr. 15, 6020 Innsbruck

Inhalt: C4 photosynthesis and Crassulacean Acid Metabolism (CAM) are both carbon concentrating mechanisms that evolved in response to high levels of photorespiration under carbon deficiency and drought stress. Both evolved multiple times in plants although they require complex alterations involving genetic, biochemical and anatomical changes of the ancestral C3 photosynthesis. Both rely partly on the same key enzymes (e.g. phosphoenolpyruvate carboxylase) which are neofunctionalized copies of housekeeping genes, however, there are also fundamental differences between these two pathways. Although C4 and CAM species constitute only a small fraction of plant diversity on our planet they produce a quarter of earth´s terrestrial primary biomass (mainly the C4 grasses) and dominate in many subtropical as well as semi-arid and arid regions. With an enormous effort researcher currently aspire to engineer the high productivity of C4 species and the drought tolerance of CAM species into C3 crops to meet the ever increasing food demands of the coming decades. The success of this scientific challenge is highly dependent on our deep understanding of the evolution and functioning of these complex traits. I will give an account of the C4 and CAM research conducted in my working group within the plant families Amaranthaceae (incl. Chenopodiaceae), Zygophyllaceae, Crassulaceae and Aizoaceae and report how our phylogenetic, genetic, biochemical and structural findings of highly diverse C4 and CAM syndromes relate to the current models of C4 and CAM evolution.

Weitere Vorträge: Botanisches Kolloquium WS 2019/2020

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