Talk by Eric Pederson about Controlled auxin biosynthesis and transport – University of Copenhagen

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Talk by Eric Pederson about Controlled auxin biosynthesis and transport

On Wednesday 11 February 2015 at 10.00-11.00 Eric Pederson from Uppsala University will give a talk about Controlled auxin biosynthesis and transport are important for developmental decisions in the early diverging land plant Physcomitrella patens.

Abstract: Flowering plants separated from early diverging land plants, also known as bryophytes, some 480 million years ago. Despite the evolutionary distance, they do share the ability to utilize phytohormones such as auxin as signalling molecules. Establishment of local auxin gradients is known to effect developmental decisions in flowering plants but is so far scarcely studied in the bryophytes.

I will present insights into the role of auxin regulatory network components in developmental decisions during the haploid phase of the life cycle of Physcomitrealla patens, the current model organism for bryophytes. We show that the function of the SHI/STY transcriptional activators, the auxin biosynthesis TAR/YUC enzymes, and the auxin efflux PIN proteins are conserved in moss, where they play crucial roles in cell fate decisions, cell expansion and cell division. This demonstrates that regulated distribution of auxin was operational in cell-fate decisions already in the common ancestor of early diverging land plant lineages, and that it has played a key role in the evolution of complex land plant structures.