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The effects of temperature and moisture on CO2 uptake and total resistance to water loss in the antarctic foliose lichen Umbilicaria antarctica

Harrisson, P.M.; Walton, David W.H. ORCID: https://orcid.org/0000-0002-7103-4043; Rothery, P.. 1989 The effects of temperature and moisture on CO2 uptake and total resistance to water loss in the antarctic foliose lichen Umbilicaria antarctica. New Phytologist, 111 (4). 673-682. https://doi.org/10.1111/j.1469-8137.1989.tb02362.x

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Abstract/Summary

Maximum net photosynthesis of field‐fresh thalli, illuminated at 200 μmol photons m−2 s−1 (PAR), was attained at 13 °C and 1.10 g g−1 water content. Small but significant rates of photosynthesis were measured at −5.5 °C. Depression of net photosynthesis at high thallus water contents is explained in terms of thallus anatomy. Calculation of evaporative resistance of the thallus by a new method showed a moisture‐dependent response pattern, and was in agreement with direct observations made on other foliose species.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1111/j.1469-8137.1989.tb02362.x
ISSN: 0028-646X
Additional Keywords: photosynthesis, lichen, ware stress, ecophysiology, umbilicaria antarctica
NORA Subject Terms: Botany
Date made live: 17 Oct 2018 09:03 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/521243

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