Title of article :
The impact of UV-B and sulphur- or copper-containing solutions in acidic conditions on chlorophyll fluorescence in selected Ramalina species
Author/Authors :
J. Garty، نويسنده , , O. Tamir، نويسنده , , T. Levin، نويسنده , , William H. Lehr، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
8
From page :
266
To page :
273
Abstract :
Ramalina maciformis and Ramalina lacera were exposed to different solutions and UV-B to seek for alterations in the PSII photosynthetic quantum yield (Fv/Fm), in response to chemicals and radiation. For R. maciformis, significant alterations of the Fv/Fm ratio occurred only in response to different bisulphite solutions. The Fv/Fm ratio decreased most in R. maciformis and R. lacera following exposure to 5 and 1 mM bisulphite, respectively. Significant differences in Fv/Fm ratios were observed for R. lacera in response to different solutions and light at different wavelengths, this being synergistic. The PSII system was unaffected by simulated acid rain in both lichens. R. maciformis, in particular, may survive limited acid rain exposure owing to high Ca oxalate accumulation. The Fv/Fm ratio decreased most in R. lacera following short-term exposures to CuSO4, suggesting that this species is more sensitive to Cu ions under acidic conditions.
Keywords :
Lichens , Photosynthetic quantum yield of photosystem II , Fv/Fm , Simulated acid rain , Bisulphite , Ca , CuSO4
Journal title :
ENVIRONMENTAL POLLUTION
Serial Year :
2007
Journal title :
ENVIRONMENTAL POLLUTION
Record number :
730912
Link To Document :
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