Acquisition of germination capacity, photosensitivity, and desiccation tolerance in lettuce seeds

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dc.contributor.authorContreras, S.
dc.contributor.authorRabara, R.
dc.contributor.authorBennett, M. A.
dc.contributor.authorTay, D.
dc.contributor.authorMcDonald, M.
dc.date.accessioned2024-01-10T12:37:24Z
dc.date.available2024-01-10T12:37:24Z
dc.date.issued2008
dc.description.abstractGermination capacity, photosensilivity, and desiccation tolerance are important attributes that seeds acquire during their development. Exploring the timing of the acquisition of these characteristics is important to better understand how different environmental conditions affecting the mother plant influence seed quality. Lettuce (Lactuca sativa L. cv. 'Tango') seeds were produced in die greenhouse. Seed germination under light and darkness was evaluated in fresh and desiccated seeds at 3, 5, 7, 9. 11, 13, 15. 17, 19, 21, 25, and 31 days after flowering (DAF). Seeds were desiccated approximate to 1 hour after harvest by placing them at 25 degrees C and 57% RK Seeds achieved maximum dry weight (physiological maturity, PM) at 13 DAF. In fresh seeds, 100% germination was observed 7 DAF. Onset of desiccation tolerance occurred 9 DAF, shortly after seed abscisic acid (ABA) concentration was at its highest level and coincident with the presence of abundant oil bodies in cotyledonary cells. Dark germination of fresh seeds increased from 0% at 11 DAF to 86% at 17 DAF and then decreased to less than 20% at 21 DAF. In general, desiccated seeds had lower dark germination percentages than fresh seeds. Onset of lettuce seed photosensitivity during the maturation desiccation phase was coincident with it sharp loss of seed water content from 37 to 11% between 17 and 19 DAF. These results Support the involvement of ABA in storage reserve deposition and acquisition of desiccation tolerance during lettuce seed development and suggest that Changes in seed water content during the maturation desiccation phase are associated with the onset of light requirement for lettuce seed germination.
dc.description.funderOhio State University
dc.description.funderOhio Agricultural Research and Development Center
dc.description.funderFulbright Scholarship
dc.format.extent12 páginas
dc.fuente.origenWOS
dc.identifier.doi10.15258/sst.2008.36.3.16
dc.identifier.eissn1819-5717
dc.identifier.issn0251-0952
dc.identifier.urihttps://doi.org/10.15258/sst.2008.36.3.16
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76838
dc.identifier.wosidWOS:000261588500016
dc.information.autorucAgronomía e Ing. Forestal;Contreras S;S/I;8151
dc.issue.numero3
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final678
dc.pagina.inicio667
dc.publisherISTA-INT SEED TESTING ASSOC
dc.revistaSEED SCIENCE AND TECHNOLOGY
dc.rightsregistro bibliográfico
dc.subjectENDOGENOUS ABSCISIC-ACID
dc.subjectDORMANCY
dc.subjectTEMPERATURE
dc.subjectTRANSITION
dc.subjectQUALITY
dc.subjectBARLEY
dc.subjectONSET
dc.subject.ods13 Climate Action
dc.subject.ods02 Zero Hunger
dc.subject.odspa13 Acción por el clima
dc.subject.odspa02 Hambre cero
dc.titleAcquisition of germination capacity, photosensitivity, and desiccation tolerance in lettuce seeds
dc.typeartículo
dc.volumen36
sipa.codpersvinculados8151
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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