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How Mediterranean plant species are able to cope with increasing levels of UV-B radiation and drought in the context of climate change?

Climatic models predict higher fluxes of UV-B radiation and a decrease in summer precipitation in the near future for the Mediterranean region. The UV radiation can be an oxidative stress factor for plants affecting their physiological activity and morphology. In this context, we aim to investigate the effects of UV (as UV-A as UV-B) radiation on Mediterranean woody species and its interaction with low water availability. The results showed that UV-A supplementation caused an increase in the plant biomass of some species when plants were grown under a low water supply. This beneficial effect on plant biomass seemed to be mediated by an improvement of plant water relations. Increases in leaf sclerophylly or leaf thickness, depending on the experiment, in response to enhanced UV radiation might have contributed to the amelioration of plant water deficit

Durant les properes d猫cades, a la Regi贸 Mediterr脿nia es preveu un augment de la radiaci贸 ultraviolada UV-B i una disminuci贸 en la precipitaci贸. La radiaci贸 UV pot ser un factor oxidatiu per les plantes afectant la seva activitat fisiol貌gica i la seva morfologia. En aquest context pretenem investigar els efectes de la radiaci贸 UV (tant UV-A com UV-B) sobre les esp猫cies llenyoses mediterr脿nies aix铆 com la seva interacci贸 amb una baixa disponibilitat h铆drica. Els nostres resultats mostren que l鈥檃ugment dels nivells d鈥橴V-A pot incrementar la producci贸 de biomassa quan les plantes creixen sota condicions de baixa disponibilitat h铆drica. Aquest efecte benefici贸s podria ser degut a una millora de les relacions h铆driques. Els canvis en la morfologia foliar observats en resposta a la radiaci贸 UV (fulles m茅s gruixudes o amb un major 铆ndex de massa per 脿rea depenent de l鈥檈xperiment) poden haver contribu茂t a aquesta millora de les relacions h铆driques

Universitat de Girona

Manager: Llorens Guasch, Laura
Verdaguer Murl脿, Dolors
Other contributions: Universitat de Girona. Departament de Ci猫ncies Ambientals
Author: Bernal Montolio, Meritxell
Date: 2013 July 22
Abstract: Climatic models predict higher fluxes of UV-B radiation and a decrease in summer precipitation in the near future for the Mediterranean region. The UV radiation can be an oxidative stress factor for plants affecting their physiological activity and morphology. In this context, we aim to investigate the effects of UV (as UV-A as UV-B) radiation on Mediterranean woody species and its interaction with low water availability. The results showed that UV-A supplementation caused an increase in the plant biomass of some species when plants were grown under a low water supply. This beneficial effect on plant biomass seemed to be mediated by an improvement of plant water relations. Increases in leaf sclerophylly or leaf thickness, depending on the experiment, in response to enhanced UV radiation might have contributed to the amelioration of plant water deficit
Durant les properes d猫cades, a la Regi贸 Mediterr脿nia es preveu un augment de la radiaci贸 ultraviolada UV-B i una disminuci贸 en la precipitaci贸. La radiaci贸 UV pot ser un factor oxidatiu per les plantes afectant la seva activitat fisiol貌gica i la seva morfologia. En aquest context pretenem investigar els efectes de la radiaci贸 UV (tant UV-A com UV-B) sobre les esp猫cies llenyoses mediterr脿nies aix铆 com la seva interacci贸 amb una baixa disponibilitat h铆drica. Els nostres resultats mostren que l鈥檃ugment dels nivells d鈥橴V-A pot incrementar la producci贸 de biomassa quan les plantes creixen sota condicions de baixa disponibilitat h铆drica. Aquest efecte benefici贸s podria ser degut a una millora de les relacions h铆driques. Els canvis en la morfologia foliar observats en resposta a la radiaci贸 UV (fulles m茅s gruixudes o amb un major 铆ndex de massa per 脿rea depenent de l鈥檈xperiment) poden haver contribu茂t a aquesta millora de les relacions h铆driques
Format: application/pdf
Document access: http://hdl.handle.net/10803/120560
Language: eng
Publisher: Universitat de Girona
Subject: Ci猫ncies del medi ambient
Ecologia general i biodiversitat
Bot脿nica
Title: How Mediterranean plant species are able to cope with increasing levels of UV-B radiation and drought in the context of climate change?
Type: doctoralThesis
Repository: TDX

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