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Responses of two Sphagnum moss species and Eriophorum vaginatum to enhanced UV-B in a summer of low UV intensity by Riikka Niemi; Pertti J. Martikainen; Jouko Silvola; Eloni Sonninen; Anu Wulff; Toini Holopainen is a Agricultural and Biological Sciences article available to read on EtoBox.

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## Summary • The flux of ultraviolet (UV)‐B radiation to the Earth's surface is increasing, particularly in high latitudes. We studied the sensitivity of some dominant plant species of boreal and subarctic peatlands to this increase. • Intact peat monoliths with the mosses __Sphagnum balticum__ and __Sphagnum papillosum__, and cotton grass (__Eriophorum vaginatum__) were exposed to ambient solar UV‐B or ambient solar UV‐B supplemented by 30% in a field experiment in central Finland. • Although the UV‐B dose was low during the growing season, owing to frequent cloudiness, both __Sphagnum__ species showed significantly higher membrane permeability under enhanced UV‐B. In __S. balticum__, UV‐B tended to decrease the capitulum dry mass and induced a 30–40% increase in the concentration of chlorophyll and carotenoid pigments. Enhanced UV‐B had no effects on leaf morphology, chlorophyll fluorescence or stomatal functioning in __E. vaginatum__. • The various UV‐B responses in the __Sphagnum__ species under investigation indicate that they may be sensitive even to small increases in solar UV‐B radiation. By contrast, __E. vaginatum__ appeared to tolerate the UV‐B fluxes of the expe

Who reads Responses of two Sphagnum moss species and Eriophorum vaginatum to enhanced UV-B in a summer of low UV intensity?

Author

Riikka Niemi; Pertti J. Martikainen; Jouko Silvola; Eloni Sonninen; Anu Wulff; Toini Holopainen

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Cambridge University Press (CUP); Wiley (ISSN 0028-646X)

Published

2002

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)