Dr Yoan Coudert awarded SEB travel grant

Dr Yoan Coudert has been awarded funds from the SEB and COB to go to the CNRS French Institute of Pondicherry, India) next year.

He will attend a training course on 'plant architectural analysis' using methods described in Barthélémy and Caraglio (2007).

Yoan will apply the methods that he learns to study architectural diversification in mosses, and will map the architectural traits that he characterizes onto moss phylogenies to understand how moss architectures evolved.

The results will prime future functional work to identify the genetic basis of architectural diversification.

Plasma membrane targeted PIN proteins regulate shoot development in a moss on line at Current Biology (http://www.cell.com/current-biology/pdf/S0960-9822%2814%2901217-2.pdf).

The plant hormone auxin is a key regulator of plant development, with roles in meristem function, leaf initiation and vascular patterning that are conserved within the vascular plants. In Arabidopsis, many papers have identified pivotal contributions of PIN-FORMED gene family members to auxin action by regulating auxin transport either between or within cells. Whilst ‘long’ PINs that localize to the plasma membrane regulate intercellular transport, ‘short’ PINs that localize to the ER regulate intracellular auxin levels.

Contrary to previous suggestions that only ER-targeted PINs function in early diverging land plant lineages, we have shown that PINs in the moss Physcomitrella have polar localizations at the plasma membrane.

We have demonstrated roles for polar auxin transport in leaf development and meristem function in gametophytic leafy shoots. We have also found that disrupting PIN function can lead to sporophytic branching.

This result is exciting in the context of the innovation of the earliest sporophytic branching forms in land plants, as it reproduces a form only seen before in the fossil record and rare natural moss variants, thereby suggesting a role for PIN-mediated auxin transport in the evolution of branching.

Our paper is back to back with a complementary paper from Jiri Friml’s lab which complements ours by demonstrating that moss PINs can transport auxin, and presents evidence of PIN functions in the development of filamentous tissues.

Graduate News: Life changes for Chris White

In the past month Chris White has got married, changed his name, moved house, passed his viva and taken up his first post-doc position in Enrico Coen’s lab (JIC) with a 4, not 2 wheeled commute- a wholehearted progression from student days! Many congratulations from the lab on all of these to Chris, with an open invitation to regress!