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Melhoramento para elevada qualidade pós-colheita: validação do método de selecção de genótipos promissores

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dc.contributor.authorCarvalho, D. R. A.
dc.contributor.authorCarvalho, S. M. P.
dc.contributor.authorFanourakis, D.
dc.contributor.authorHeuvelink, E.
dc.contributor.authorAlmeida, Domingos P. F.
dc.date.accessioned2012-01-19T17:15:24Z
dc.date.available2012-01-19T17:15:24Z
dc.date.issued2011
dc.description.abstractBreeding for better keeping quality: validation of the selection method of promising genotypes. Water stress is one of the most important postharvest quality problems, resulting in shorter vase life and reduced consumer‟s satisfaction. This problem is enhanced in plants grown at high RH (RH > 85%) due to stomatal malfunctioning leading to shorter postharvest longevity. Previously, a subset of a segregating tetraploid population (60 genotypes) cultivated in a greenhouse under noncontroled RH was characterized for stomatal responsiveness to water stress (i.e. desiccation). The population screening revealed extreme differences of relative water content (RWC) after 4 h leaf desiccation. This study aims at the validation of a selection method for promising genotypes with good stomatal responsiveness to desiccation (i.e. high RWC after 4 h desiccation) when grown under contrasting HR conditions. Therefore, five genotypes with expected good stomatal response to desiccation were selected for this study. These genotypes were grown under moderate RH (60%) and high RH (90%). The RWC was significantly different within the five studied genotypes. K099 was the most tolerant genotype to desiccation, with a RWC after 4 h desiccation 19% higher than the least tolerant genotype. Genotypes cultivated at high RH had on average only 10% lower RWC, as compared to genotypes grown at moderate RH, confirming a good stomatal response. The postharvest longevity varied between 12 (K119) and 25 (K099) days and it was not significantly affected by the two different RH during growth. It is concluded that the analysis of the stomatal responsiveness in leaves of cut roses is an efficient method that allows, in the early stages of the selection process, to identify tolerant genotypes to high RH.por
dc.identifier.citationCARVALHO, D. R. A…[et al.] - Melhoramento para elevada qualidade pós-colheita: validação do método de selecção de genótipos promissores. In V Jornadas Ibéricas de Horticultura Ornamental - Faro, Portugal, 13-15 Outubro, 2011 - Actas Portuguesas de Horticultura, n.º 19. [Lisboa]: Associação Portuguesa de Horticultura, 2011. p. 90-102por
dc.identifier.urihttp://hdl.handle.net/10400.14/7546
dc.language.isoporpor
dc.peerreviewednopor
dc.publisherAssociação Portuguesa de Horticulturapor
dc.subjectElative humiditypor
dc.subjectRosa hybridapor
dc.subjectStomatapor
dc.subjectTranspiration ratepor
dc.subjectVase lifepor
dc.titleMelhoramento para elevada qualidade pós-colheita: validação do método de selecção de genótipos promissorespor
dc.typeconference object
dspace.entity.typePublication
person.familyNameCarvalho
person.familyNameFanourakis
person.givenNameSusana M.P.
person.givenNameDimitrios
person.identifier194747
person.identifier.ciencia-id5E16-859A-37A4
person.identifier.orcid0000-0001-7157-1079
person.identifier.orcid0000-0002-6319-4223
person.identifier.ridI-7184-2013
person.identifier.scopus-author-id7005619826
person.identifier.scopus-author-id35361862300
rcaap.rightsopenAccesspor
rcaap.typeconferenceObjectpor
relation.isAuthorOfPublicatione52d58d9-9c7d-4a20-afbd-04195a6ab912
relation.isAuthorOfPublication02a2670a-940c-4ffa-95a4-145941dcd616
relation.isAuthorOfPublication.latestForDiscoverye52d58d9-9c7d-4a20-afbd-04195a6ab912

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