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Response and adaptive strategies of Antarctic flora to ultraviolet radiation stress

Authors
Journal
Journal of Photochemistry and Photobiology C Photochemistry Reviews
1389-5567
Publisher
Elsevier
Publication Date
Volume
11
Identifiers
DOI: 10.1016/j.jphotochemrev.2010.07.001
Keywords
  • Defence Mechanism
  • Dna Repair
  • Ultraviolet Radiation
  • Uv-Absorbing Compounds
Disciplines
  • Biology

Abstract

Abstract Antarctica is place well known for its adverse conditions – low temperature, low water availability, strong winds and high incidence of solar radiation, specially the UV radiation altogether constitute limiting factor for plant and animal life. Absorption of UV-B radiation by plants can damage and disrupt key biological molecules. UV-B damage can manifest reduced photosynthesis, growth of the plants and photosynthetic productivity. Antarctic plants experiences UV-B stress and for their survival has shown various adaptive strategies. The first line of defence is to screen UV-B radiation before it reaches the cell, then to minimize damage within the cells through other protective strategies, and finally to repair damage once it has occurred. The survival of Antarctic plants under ‘ozone depletion’ depends on their ability to acclimate, by employing photoprotective mechanisms to avoid and repair UV-B damage.

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