Abstract
Using Nostoc commune as experiment target, the effect of CO2 with different concentrations in atmosphere and dosage of UV-B on photosynthetic pigment chlorophyll a (Chl a), carotenoids, phycoerythrin, phycocyanin, allophycocyanin and UV-B masking materials was studied. The results showed that high dosage of UV-B radiation inhibited the synthesis process of Chl a, phycoerythrin, phycocyanin and allophycocyanin, but promoted the synthesis of carotenoids, MAAs and scytonemin, thus the negative effect produced by UV-B radiation was reduced and the resistance of Nostoc commune against UV-B radiation was enhanced.
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