Journal article

MORPHOLOGICAL FLEXIBILITY OF COCCONEIS PLACENTULA (BACILLARIOPHYCEAE) NANOSTRUCTURE TO CHANGING SALINITY LEVELS1

Sophie C Leterme, Amanda V Ellis, Jim G Mitchell, Marie-Jeanne Buscot, Thomas Pollet, Mathilde Schapira, Laurent Seuront

JOURNAL OF PHYCOLOGY | WILEY | Published : 2010

Abstract

Diatoms possess a silica frustule decorated with unique patterns of nanosize features. Here, we show for the first time from in situ samples that the size of the nanopores present at the surface of the diatom Cocconeis placentula Ehrenb. varies with fluctuating salinity levels. The observed reduction in nanopore size with decreasing salinity agrees with previous laboratory experiments. We also uniquely combined our observations with theoretical considerations to demonstrate that the decrease in the diffusive layer thickness is compensated for by the changes in pore size, which maintain a steady diffusive flux toward the diatom's cell at different salinities. This process allows diatoms to ab..

View full abstract

University of Melbourne Researchers

Grants

Awarded by Australian Research Council


Awarded by Australian Professorial Fellowship


Funding Acknowledgements

We thank the Department for Environment and Heritage for allowing us to undertake our research in the Coorong National Park. This project has been funded by the Australian Research Council and Flinders University. This research was supported under Australian Research Council's Discovery Projects funding scheme (project numbers DP0664681 and DP0666420). Professor Seuront is the recipient of an Australian Professorial Fellowship (project number DP0988554).