Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/4591
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
DC FieldValueLanguage
dc.contributor.authorRomero-Aranda, Remedios-
dc.date.accessioned2008-05-27T16:16:17Z-
dc.date.available2008-05-27T16:16:17Z-
dc.date.issued2002-12-05-
dc.identifier.citationMejora. Merceen_US
dc.identifier.urihttp://hdl.handle.net/10261/4591-
dc.description.abstractPrevious studies on the tomato (Lycopersicon esculentum Mill.) peroxidase TPX1, including the development of transgenic tomato over-expressing this gene, supported an involvement of this peroxidase in the synthesis of lignin and suberin. The transgenic plants showed a wilty phenotype at flowering, but the relationship between this role in ligno-suberization and this phenotype was not clear. In the present study a histological approach and the measurement of water-related parameters have been performed in order to obtain an insight into the origin of this phenotype. Clear differences between transgenic and non-transgenic roots were observed in the cross-sections of the basal root zones where secondary growth was evident. The diameter of the xylem vessel was diminished in the transgenic plants. Total area corresponding to xylem in the basal cross-sections decreased 3.9 fold in the transgenic roots. In addition, the radial and outer tangential walls of the exodermis cells were more ligno-suberized in transgenic than in non-transgenic plants. After fruit set, predawn and midday water potentials were lower in transgenic than in-non-transgenic plants. At midday, the stomatal conductance was also lower in the transgenic plants, 494±69 versus 594±60 mmol m−2 s−1. Root hydraulic conductances of the transgenic and non-transgenic plants were 1.4±0.38 and 3.47±0.19 g water min−1 MPa−1, respectively. The results obtained support that the phenotype is caused by the anatomical differences found in the transgenic roots. These differences would be the cause of a increased resistance to water flow in the roots that would negatively affect the water supply to the shoot and, as a consequence, resulted in a decreased water potential in the leaves.en_US
dc.description.sponsorshipEstación Experimental La Mayora, CSIC, 29750 Algarrobo-Costa, Málaga, Spain Departamento de Biología Vegetal, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos S/N, 29071 Málaga, Spain Departamento de Biología Vegetal, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos S/N, 29071 Málaga, Spainen_US
dc.format.extent8251362 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoengen_US
dc.publisherBlackwell Publishingen_US
dc.relation.ispartofseries1en_US
dc.rightsopenAccessen_US
dc.titleStructural and physiological changes in the roots of tomato plants over-expressing a basic peroxidaseen_US
dc.typeartículoen_US
dc.identifier.doi10.1034/j.1399-3054.2003.00115.x-
dc.description.peerreviewedPeer revieweden_US
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.fulltextWith Fulltext-
item.cerifentitytypePublications-
item.grantfulltextopen-
item.languageiso639-1en-
item.openairetypeartículo-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
Appears in Collections:(IHSM) Artículos
Files in This Item:
File Description SizeFormat
STRUCTURAL AND PHYSIOLOGICAL CHANGES.pdf8,06 MBAdobe PDFThumbnail
View/Open
Show simple item record

SCOPUSTM   
Citations

34
checked on Jun 19, 2022

WEB OF SCIENCETM
Citations

31
checked on Jun 27, 2022

Page view(s)

261
checked on Jun 27, 2022

Download(s)

241
checked on Jun 27, 2022

Google ScholarTM

Check

Altmetric

Dimensions


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.