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http://hdl.handle.net/10261/5437
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Campo DC | Valor | Lengua/Idioma |
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dc.contributor.author | Gogorcena Aoiz, Yolanda | - |
dc.contributor.author | Iturbe-Ormaetxe, Iñaki | - |
dc.contributor.author | Escuredo, Pedro R. | - |
dc.contributor.author | Becana Ausejo, Manuel | - |
dc.date.issued | 1994-09 | - |
dc.identifier.citation | PLANT PHYSIOLOGY , Vol 108, Issue 2 753-759 | en_US |
dc.identifier.issn | 0032-0889 | - |
dc.identifier.uri | http://hdl.handle.net/10261/5437 | - |
dc.description.abstract | The involvement of activated oxygen in the drought-induced damage of pea (Pisum sativum L. cv Frilene) nodules was examined. To this purpose, various pro-oxidant factors, antioxidant enzymes and related metabolites, and markers of oxidative damage were determined in nodules of well-watered (nodule water potential approximately -0.29 MPa) and water-stressed (nodule water potential approximately -2.03 MPa) plants. Water-stressed nodules entered senescence as evidenced by the 30% decrease in leghemoglobin and total soluble protein. Drought also caused a decrease in the activities of catalase (25%), ascorbate peroxidase (18%), dehydroascorbate reductase (15%), glutathione reductase (31%), and superoxide dismutase (30%), and in the contents of ascorbate (59%), reduced (57%) and oxidized (38%) glutathione, NAD+ and NADH (43%), NADP+ (31%), and NADPH (17%). The decline in the antioxidant capacity of nodules may result from a restricted supply of NAD(P)H in vivo for the ascorbate-glutathione pathway and from the Fe-catalyzed Fenton reactions of ascorbate and glutathione with activated oxygen. The 2-fold increase in the content of "catalytic Fe" would also explain the augmented levels of lipid peroxides (2.4-fold) and oxidatively modified proteins (1.4-fold) found in water-stressed nodules because of the known requirement of lipid and protein oxidation for a transition catalytic metal. | en_US |
dc.description.sponsorship | This work was supported by grant PB92-0058 from the Dirección General de Investigación Científica y Técnica of Spain. Y.G., I.I.O., and P.R.E. were the recipients, respectively, of a postdoctoral contract from Ministerio de Educación y Ciencia, a predoctoral fellowship from Gobierno Vasco, and a predoctoral fellowship from Ministerio de Educación y Ciencia. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | American Society of Plant Biologists | en_US |
dc.rights | openAccess | en_US |
dc.title | Antioxidant Defenses against Activated Oxygen in Pea Nodules Subjected to Water Stress | en_US |
dc.type | artículo | en_US |
dc.description.peerreviewed | Peer reviewed | en_US |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.grantfulltext | open | - |
item.openairetype | artículo | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
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link-BecanaM_PlantPhys_1995.pdf | 19,68 kB | Adobe PDF | Visualizar/Abrir |
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