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Photosynthesis and Respiration of Three Mosses at Winter Low Temperatures

L. Atanasiu
The Bryologist
Vol. 74, No. 1 (Spring, 1971), pp. 23-27
DOI: 10.2307/3241751
Stable URL: http://www.jstor.org/stable/3241751
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Photosynthesis and Respiration of Three Mosses at Winter Low Temperatures
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Abstract

The intensities of photosynthesis and respiration of three montane mosses were determined at winter low temperatures. The experiments were carried out under outdoor light and at air temperature, the exposure lasting 4-5 hours. The lowest temperature for CO2 assimilation in Brachythecium geheebii and Camptothecium philippeanum was -9° C; for Isothecium viviparum it was about -8° C. In the dark respiration also occurred at -14° C. The minimum temperatures for CO2 assimilation by the tested mosses in winter are somewhat lower than those for evergreen trees and nearer to the minimum temperatures for lichens.

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