biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 52:740-742, 2008 | DOI: 10.1007/s10535-008-0143-z

Ca2+ reduces the effect of hypoxia in mosses Mnium undulatum and Polytrichum commune

A. Rzepka1,*, J. Krupa1
1 Department of Plant Physiology, Institute of Biology, Pedagogical Academy, Kraków, Poland

Gametophores of mosses Mnium undulatum and Polytrichum commune were submerged in distilled water or in calcium chloride solution (0.9 mM Ca2+) to induce hypoxia. The net photosynthetic (PN) and dark respiration rate (RD) were measured in the air containing 300-400 µmol(CO2).mol-1(air) and 0.21 mol(O2).mol-1(air). PN of M. undulatum gametophores decreased to 58 % of the control after 1-h submersion in water, whereas to 80 % of the control in P. commune gametophores. A smaller decrease in PN was observed when the gametophores were immersed in CaCl2 solution. In hypoxia, RD in the tested mosses species was a little higher than in the control.

Keywords: net photosynthetic rate; dark respiration rate
Subjects: gametophores; gas exchange; Mnium undulatum; Polytrichum commune; respiration

Received: December 1, 2006; Accepted: July 3, 2007; Published: December 1, 2008  Show citation

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Rzepka, A., & Krupa, J. (2008). Ca2+ reduces the effect of hypoxia in mosses Mnium undulatum and Polytrichum commune. Biologia plantarum, 52(4), 740-742. doi: 10.1007/s10535-008-0143-z
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