COMPARATIVE ASPECTS OF PHOTOSYNTHESIS, PHOTORESPIRATION AND TRANSPIRATION IN FOUR SPECIES OF THE CYPERACEAE FROM THE RELICT FLORA OF TEESDALE, NORTHERN ENGLAND

• Published in: New Phytologist
• Main Authors: LLOYD, N. D. H., WOOLHOUSE, H. W.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1979
• Subjects: Arctic
• Online Access: http://dx.doi.org/10.1111/j.1469-8137.1979.tb00719.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-8137.1979.tb00719.x; https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-8137.1979.tb00719.x

S ummary Populations of two continental‐northern species, Carex ericetorum Poll, and Eriophonim latifolium Hoppe and two arctic‐alpine species, Kobresia simpliduscula (Wahlenb.) Mackenzie and Carex capillaris L., from the flora of Teesdale were grown under controlled conditions and their rates of photosynthesis, photorespiration and transpiration were measured in an open gas‐analysis system over the leaf temperature range 5 to 30 °C over a range of irradiances. The maximum rates and the temperature optima for photosynthesis were similar for all the species. The rates of photosynthesis at low temperature and the light saturation characteristics of C. ericetorum and E. latifolium were significantly different from those of K. simpliciuscula and C. capillaris. The differences are discussed in relation to the habitats in which these species usually occur.