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Impact of UV-B radiation on photosynthesis – an overview

2012; United Arab Emirates University; Volume: 24; Issue: 6 Linguagem: Inglês

10.9755/ejfa.v24i6.14673

2079-0538

Fernando José Cebola Lidon, Fernando H. Reboredo, António E. Leitão, Maria Manuela Silva, Maria Paula Duarte, José C. Ramalho,

Atmospheric Ozone and Climate

Ultraviolet-B (UV-B) radiation constitutes a minor part of the solar spectrum, being most of this solar radiation absorbed by the UV-screening stratospheric ozone layer. Yet, a global depletion of the ozone layer, largely due to the release of chlorofluorocarbons caused by human activities, has resulted in an increase of solar UV-B radiation at the earth’s surface. Accordingly, in the temperate latitudes, such ozone decrease reached ca. 3% and 6% in the North and South hemispheres, respectively, between 2002 and 2005 (as compared to the 1970s). Despite the uncertainty of long-term predictions, it is also estimated an UV-B increase of 5-10% over temperate latitudes within the next 15 years In this context, this work aim at to present an overview of plants sensitivity/tolerance to UV-B irradiation mostly considering the key photosynthetic metabolism. doi: http://dx.doi.org/10.9755/ejfa.v24i6.14673