Abstract
The response of Ceratophyllum demersum and Myriophyllum spicatum to three levels of UV-B radiation — reduced (ca. 50% reduction), ambient and enhanced UV-B radiation, simulating 17% ozone depletion — is discussed. The research revealed that UV-B stimulated the production of UV-B absorbing compounds in C. demersum, but not in M. spicatum. The relative amount of UV-B absorbing compounds was about four times lower in C. demersum. Enhanced UV-B also affected respiratory potential in C. demersum (on average 3.7 mg O2/gDM/h), but no effect on M. spicatum (on average 5.5 mg O2/gDM/h) was detected. Increased need for energy revealed that UV-B radiation exerted stress in C. demersum. No changes in chlorophyll a and no disturbance to photochemical efficiency due to UV-B were observed in either species.
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Germ, M., Masej, Z., Gaberščik, A., Sedej, T. (2006). The response of Ceratophyllum demersum L. and Myriophyllum spicatum L. to reduced, ambient, and enhanced ultraviolet-B radiation. In: Caffrey, J.M., Dutartre, A., Haury, J., Murphy, K.J., Wade, P.M. (eds) Macrophytes in Aquatic Ecosystems: From Biology to Management. Developments in Hydrobiology, vol 190. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5390-0_7
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DOI: https://doi.org/10.1007/978-1-4020-5390-0_7
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