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Environmental PollutionVolume 104, Issue 3, March 1999, Pages 383-388

Growth, photosynthesis and UV-B absorbing compounds of Portuguese Barbela wheat exposed to ultraviolet-B radiation(Article)

  • Dept. of Biol. and Environ. Eng., Univ. Tras-os-Montes Alto D., Apartado, Portugal

Abstract

Wheat plants (Triticum aestivum L.) were exposed to two levels of UV-B radiation (ambient UV-B and high UV-B, simulating a 20% reduction in the ozone layer) under mediterranean field-growth conditions. After 4 months of UV-B treatment, total plant biomass of high UV-B plants was 18% lower compared to control plants. The decrease of biomass appears to be the result of changes in morphological and physiological processes. High UV-B treatment induces decreases in leaf area, net photosynthesis rate, transpiration rate and water use efficiency. Pigment analysis of leaf extracts showed increases in chlorophyll content and no effect on accumulation of UV-B absorbing pigments. The underlying mechanisms for these results are discussed. Copyright (C) 1998 Elsevier Science Ltd.

Author keywords

Growth analysisPhotosynthesisUV absorbing pigmentsUV-B radiationWheat

Indexed keywords

EMTREE drug terms:chlorofluorocarbonpigment
EMTREE medical terms:articlebiomasscontrolled studynonhumanozone layerphotosynthesisplant growthradiation absorptionultraviolet b radiationwheat
Species Index:BarbelaTriticum aestivum
  • ISSN: 02697491
  • CODEN: ENPOE
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1016/S0269-7491(98)00191-2
  • Document Type: Article

  Correia, C.M.; Department of Biological Engineering, University of Tras-os-Montes, Apartado 202, Portugal;
© Copyright 2009 Elsevier B.V., All rights reserved.

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Araújo, M. , Santos, C. , Costa, M.
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