Red to Far-red Ratio During Seed Development Affects Lettuce Seed Germinability and Longevity

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dc.contributor.authorContreras, Samuel
dc.contributor.authorBennett, Mark A.
dc.contributor.authorMetzger, James D.
dc.contributor.authorTay, David
dc.contributor.authorNerson, Haim
dc.date.accessioned2024-01-10T12:08:03Z
dc.date.available2024-01-10T12:08:03Z
dc.date.issued2009
dc.description.abstractThermoinhibition and photosensitivity are two characteristics of lettuce seed that frequently affect its stand. The main objective of this study was to evaluate the hypothesis that lettuce seed germinability and longevity are affected by the red to far-red light ratio (R:FR) under which seeds maturate. 'Tango' lettuce seeds were produced in growth chambers under one of two treatments: 1) red-rich light (11 treatment) and 2) far-red-rich light (FR treatment). For both treatments, the percentage of normal seedlings germinated at 20 degrees C-light was approximate to 100%. When germinated under the light, seeds from the R treatment exhibited a higher germination percentage and a faster germination (under a broader range of temperatures) than seeds from the FR treatment. When germinated in the dark, seeds from the R treatment germinated 100% between 12 and 23 degrees C and over 50% at 30 degrees C, whereas seeds from the FR treatment germinated less than 35% between 12 and 23 degrees C and less than 5% at 30 degrees C. Seeds from the 11 treatment had lower abscisic acid (ABA) content and were better able to germinate when exposed to external ABA concentrations than seeds from the FR treatment. Seed longevity as assessed by the accelerated aging test was higher in seeds from the FR treatment, indicating that red-rich light was detrimental to longevity. In another experiment, lettuce seeds that developed under similar conditions were harvested at approximately the moment of maximum dry weight accumulation and desiccated in dark, far-red, red, or fluorescent + incandescent light. Seeds desiccated under red light exhibited higher dark germination than the other treatments; however, no differences were observed in thermoinhibition or longevity. These results suggest that lettuce seed produced in an environment with a high R:FR light ratio will exhibit reduced thermoinhibition and photosensitivity as compared with production in a lower R:FR light environment.
dc.description.funderOhio State University
dc.description.funderOhio Agricultural Research and Development Center
dc.description.funderFulbright Scholarship
dc.format.extent5 páginas
dc.fuente.origenWOS
dc.identifier.doi10.21273/HORTSCI.44.1.130
dc.identifier.eissn2327-9834
dc.identifier.issn0018-5345
dc.identifier.urihttps://doi.org/10.21273/HORTSCI.44.1.130
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76353
dc.identifier.wosidWOS:000262707200027
dc.information.autorucAgronomía e Ing. Forestal;Contreras S;S/I;8151
dc.issue.numero1
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final134
dc.pagina.inicio130
dc.publisherAMER SOC HORTICULTURAL SCIENCE
dc.revistaHORTSCIENCE
dc.rightsregistro bibliográfico
dc.subjectabscisic acid
dc.subjectlight
dc.subjectLactuca sativa
dc.subjectmaternal environment
dc.subjectphotosensitivity
dc.subjectseed development
dc.subjectthermoinhibition
dc.subjectMATERNAL LIGHT ENVIRONMENT
dc.subjectPHYTOCHROME REGULATION
dc.subjectCRISP LETTUCE
dc.subjectARABIDOPSIS SEEDS
dc.subjectLACTUCA-SATIVA
dc.subjectABSCISIC-ACID
dc.subjectGERMINATION
dc.subjectTEMPERATURE
dc.subjectPERFORMANCE
dc.subjectDORMANCY
dc.subject.ods02 Zero Hunger
dc.subject.ods13 Climate Action
dc.subject.odspa02 Hambre cero
dc.subject.odspa13 Acción por el clima
dc.titleRed to Far-red Ratio During Seed Development Affects Lettuce Seed Germinability and Longevity
dc.typeartículo
dc.volumen44
sipa.codpersvinculados8151
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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