Temperature during seed development affects weight, germinability and storability of lettuce seeds

dc.contributor.authorContreras, S.
dc.contributor.authorBennett, M. A.
dc.contributor.authorTay, D.
dc.date.accessioned2024-01-10T13:43:43Z
dc.date.available2024-01-10T13:43:43Z
dc.date.issued2009
dc.description.abstractSeed germinability and storability are important aspects of lettuce seed quality determined by the genotype and environment of seed development. The objective of this study was to determine how temperature of the mother plant environment affects lettuce seed quality. Seeds of cv. Tango were produced in growth chambers under one of two treatments: i) high temperature (HT), with day/night temperatures of 30/20 degrees C, respectively, and ii) low temperature (LT), with temperatures of 20/10 degrees C. Seeds produced at LT were 37% heavier than seed from HT, however germination at optimal conditions (20 degrees C-light) was similar for both treatments. Seeds from HT presented higher dark germination at 18, 24 and 29 degrees C. Germinability (% and rates) under light at temperatures between 20 and 30 degrees C was similar for seeds from both treatments, however at temperatures between 30 and 40 degrees C seeds from HT performed better than those from LT. When germinated at exogenous abscisic acid concentrations or negative osmotic potentials, germinability of seed from HT was less affected than LT. After accelerated aging (41 degrees C, similar to 100%RH, 72 h), germination of normal seedlings was higher for seeds from HT. Germination after I and 2 months of storage at 30 degrees C and 74% RH was better for seeds from HT. The critical moment for temperature effects was also studied. Seed weight, dark germination at 30 degrees C and germination at low osmotic potential were shown to be determined earlier during seed development (before 5 and 4 d after flowering for seeds from LT and HT, respectively). On the other hand, seed storability was determined at the end of seed development, after physiological maturity (approximate to 16 and 11 d after flowering for LT and HT seeds, respectively). In conclusion, higher 'Tango' lettuce seed germinability and storability results were attained when seeds were produced at higher temperatures.
dc.format.extent15 páginas
dc.fuente.origenWOS
dc.identifier.doi10.15258/sst.2009.37.2.13
dc.identifier.eissn1819-5717
dc.identifier.issn0251-0952
dc.identifier.urihttps://doi.org/10.15258/sst.2009.37.2.13
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78736
dc.identifier.wosidWOS:000272268600013
dc.information.autorucAgronomía e Ing. Forestal;Contreras S;S/I;8151
dc.issue.numero2
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final412
dc.pagina.inicio398
dc.publisherISTA-INT SEED TESTING ASSOC
dc.revistaSEED SCIENCE AND TECHNOLOGY
dc.rightsregistro bibliográfico
dc.subjectENDOGENOUS ABSCISIC-ACID
dc.subjectCRISP LETTUCE
dc.subjectLACTUCA-SATIVA
dc.subjectGERMINATION
dc.subjectDORMANCY
dc.subjectQUALITY
dc.subjectYIELD
dc.subjectVIGOR
dc.subjectPERFORMANCE
dc.subjectGROWTH
dc.subject.ods02 Zero Hunger
dc.subject.ods13 Climate Action
dc.subject.odspa02 Hambre cero
dc.subject.odspa13 Acción por el clima
dc.titleTemperature during seed development affects weight, germinability and storability of lettuce seeds
dc.typeartículo
dc.volumen37
sipa.codpersvinculados8151
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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