Affiliation: | 1. Plant Science Laboratories, School of Biological Sciences, University of Reading, Whiteknights, PO Box 221, Reading RG6 6AS, UK;2. British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK;3. Gateway Antarctica, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand |