DIFFERENTIAL PHOTOSYNTHETIC INHIBITION BY ULTRAVIOLET RADIATION IN SPECIES FROM THE ARCTIC-ALPINE LIFE ZONE (JOURNAL VERSION)

Inhibition of photosynthesis and epidermal damage resulting from ultraviolet irradiation were assessed for arctic and alpine plant species. These species were taken from a latitudinal gradient of the arctic-alpine life zone from the Andes to northern Alaska, which spans a steep change in solar UV-B...

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Bibliographic Details
Main Authors: Martyn M. Caldwell, Ronald Robberecht, Robert S. Nowak, W.D. Billings
Format: Text
Language:unknown
Published: 2004
Subjects:
Arctic
Alaska
Online Access:http://oaspub.epa.gov/eims/eimsapi.dispdetail?deid=35718
Description
Summary:Inhibition of photosynthesis and epidermal damage resulting from ultraviolet irradiation were assessed for arctic and alpine plant species. These species were taken from a latitudinal gradient of the arctic-alpine life zone from the Andes to northern Alaska, which spans a steep change in solar UV-B irradiation (280 to 320 nm). Ecotypes and species from the Arctic, where solar UV-B flux is very low, were consistently more sensitive to UV radiation than their counterparts from lower latitude alpine regions, where solar UV-B flux is high.

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