New views of tapetum ultrastructure and pollen exine development in Arabidops…

† Background and Aims: The Arabidopsis thaliana pollen cellwall is acomplex structure consisting of an outer sporopollenin framework and lipid-rich coat, as well as an inner cellulosic wall. Although mutant analysis has been a useful tool to study pollen cell walls, the ultrastructure of the arabidopsis anther has proved to be challenging to preserve for electron microscopy. † Methods:…