2024-03-29T08:56:52Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/512852016-02-17T08:00:05Zcom_10261_75com_10261_6com_10261_10735com_10261_2col_10261_328col_10261_10736
Climate change (elevated CO 2, elevated temperature and moderate drought) triggers the antioxidant enzymes' response of grapevine cv. Tempranillo, avoiding oxidative damage
Salazar-Parra, Carolina
Aguirreolea, Jone
Sánchez-Díaz, Manuel
Irigoyen, Juan José
Morales Iribas, Fermín
Ministerio de Ciencia e Innovación (España)
Fundación Universitaria de Navarra
Caja Navarra
Gobierno de Aragón
Asociación de Amigos de la Universidad de Navarra
Photosynthetic carbon fixation (A N) and photosynthetic electron transport rate (ETR) are affected by different environmental stress factors, such as those associated with climate change. Under stress conditions, it can be generated an electron excess that cannot be consumed, which can react with O 2, producing reactive oxygen species. This work was aimed to evaluate the influence of climate change (elevated CO 2, elevated temperature and moderate drought) on the antioxidant status of grapevine (Vitis vinifera) cv. Tempranillo leaves, from veraison to ripeness. The lowest ratios between electrons generated (ETR) and consumed (A N + respiration + photorespiration) were observed in plants treated with elevated CO 2 and elevated temperature. In partially irrigated plants under current ambient conditions, electrons not consumed seemed to be diverted to alternative ways. Oxidative damage to chlorophylls and carotenoids was not observed. However, these plants had increases in thiobarbituric acid reacting substances, an indication of lipid peroxidation. These increases matched well with an early rise of H 2O 2 and antioxidant enzyme activities, superoxide dismutase (EC 1.15.1.1), ascorbate peroxidase (EC 1.11.1.11) and catalase (EC 1.11.1.6). Enzymatic activities were maintained high until ripeness. In conclusion, plants grown under current ambient conditions and moderate drought were less efficient to cope with oxidative damage than well-irrigated plants, and more interestingly, plants grown under moderate drought but treated with elevated CO 2 and elevated temperature were not affected by oxidative damage, mainly because of higher rates of electrons consumed in photosynthetic carbon fixation. © Physiologia Plantarum 2011.
We thank the Spanish Ministry of Science and Innovation (BFU2008-01405/BFI), Fundacion Universitaria de Navarra (Plan de Investigaci ´ on´ de la Universidad de Navarra), Caja Navarra and Gobierno de Aragon (A03 research group) for financial support, ´ Asociacion de Amigos de la Universidad de Navarra for ´ Carolina Salazar-Parra grant, A. Urdiain, M. Oyarzun (University of Navarra) and A. Calvino (Estaci ˜ on Experimental de ´ Aula Dei-CSIC) for excellent technical assistance, and Station of Viticulture and Enology of Navarra (Olite, Navarra, Spain) for dormant cuttings supply
Peer Reviewed
2012-06-11T13:52:53Z
2012-06-11T13:52:53Z
2012
2012-06-11T13:52:53Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1111/j.1399-3054.2011.01524.x
issn: 0031-9317
Physiologia Plantarum 144: 99-110 (2012)
http://hdl.handle.net/10261/51285
10.1111/j.1399-3054.2011.01524.x
http://dx.doi.org/10.13039/501100004837
http://dx.doi.org/10.13039/501100010293
http://dx.doi.org/10.13039/501100010067
en
none
Blackwell Publishing