Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/77531
DC FieldValueLanguage
dc.contributor.authorCollen, Jonásen_US
dc.contributor.authorJimenez del Río, Miguelen_US
dc.contributor.authorGarcía-Reina, Guillermoen_US
dc.contributor.authorPedersén, Marianneen_US
dc.date.accessioned2021-02-04T13:12:20Z-
dc.date.available2021-02-04T13:12:20Z-
dc.date.issued1995en_US
dc.identifier.issn0032-0935en_US
dc.identifier.urihttp://hdl.handle.net/10553/77531-
dc.description.abstractProduction of hydrogen peroxide has been found in Ulva rigida (Chlorophyta). The formation of Hz02 was light dependent with a production of l.2 µmol·g Fw-1 -h-1 in sea water (pH 8.2) at an irradi­ance of 700 µmol photons m-2 ,s-1 • The excretion was also pH dependen!: in pH 6.5 the production was not de­tectable ( < 5 nmol·g FW-1 ·h-1 ) but at pH 9.0 the produc­tion was 5.0 µmol·g FW- 1 ·h-1 • The production of H202 was totally inhibited by 3-(3,4-d ichlo ro phenyl}- I, l­dimethylurea (DCMU). The ability oí U. rigida growing in tanks (750 1) under a natural light regime to excre te H202 was checked and found to be seven times higher at 08.00 hours than other times of the day. The H202 con­centration in the cultivation tank (density : 2 g FW·I-1 ) reached the highest value (3 µM) at 11.00 hours. Photo­syn thesis was not influenced by H202 formation. The Hz02 is suggested to come from the Mehler reaction (pseudocyclic photophosphorylation). With an oxygen evolution of 120 mmol·g FW-' ·h-1 at pH 8.2 and 90 mmol·g Fw-1 -h-1 at pH 9.0, 0.5% and 2.7% of the electrons were used for extracellular H202 prod uction. The H202 production is sufficiently high to be of physio­logical and ecological signiócance, and is suggested to be a part of the defence against epi- and endophytesen_US
dc.languagespaen_US
dc.relation.ispartofPlantaen_US
dc.sourcePlanta [ISSN 0032-0935], v. 196, p.225-230en_US
dc.subject241707 Algología (ficología)en_US
dc.subject.otherChemical defenceen_US
dc.subject.otherHydrogen peroxideen_US
dc.subject.otherMehler reactionen_US
dc.subject.otherPhotosynthesisen_US
dc.subject.otherUlvaen_US
dc.titlePhotosynthetic production of hidrogen peroxide by Ulva rigida C. Ag. (Chlorophyta)en_US
dc.typeinfo:eu-repo/semantics/articleen_US
dc.typeArticleen_US
dc.description.lastpage230en_US
dc.description.firstpage225en_US
dc.relation.volume196en_US
dc.investigacionCienciasen_US
dc.type2Artículoen_US
dc.description.numberofpages6en_US
dc.identifier.ulpgcen_US
dc.contributor.buulpgcBU-BASen_US
dc.description.scieSCIE
item.fulltextSin texto completo-
item.grantfulltextnone-
crisitem.author.fullNameGarcia-Blairsy Reina, Guillermo-
Appears in Collections:Artículos
Show simple item record

Google ScholarTM

Check


Share



Export metadata



Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.