Restricted water availability during lettuce seed production decreases seed yield per plant but increases seed size and water productivity

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dc.contributor.authorContreras, Samuel
dc.contributor.authorBennett, Mark A.
dc.contributor.authorTay, David
dc.date.accessioned2024-01-10T14:21:34Z
dc.date.available2024-01-10T14:21:34Z
dc.date.issued2008
dc.description.abstractLettuce (Lactuca sativa) is an important vegetable crop worldwide, and its seed is commercially produced mainly under irrigation in and and semiarid regions. The objective of this study was to determine how water availability during seed development affects lettuce seed productivity and quality. Three experiments were performed in the greenhouse and growth chambers using lettuce (cv. Tango) cultivated in pots. When watering volume was restricted (dry treatment) from bolting to seed harvest to 54% of the well-watered control (wet treatment), plants were shorter, had reduced dry weight, and produced fewer and heavier seeds. Water productivity (seed yield/watering volume) was nearly 50% higher in the dry treatment. Seeds from the dry treatment had a modest improvement in seed vigor (assessed by seedling growth) and decreased germinability (higher sensitivity to exogenous abscisic acid and water potential) compared with the wet treatment. In another experiment, water stress was applied abruptly to well-hydrated lettuce plants with developing seeds. Seeds that were at one-third and two-thirds of physiological maturity when water was withheld had lower germinability and greater storability than seeds with no water restriction. These results provide information that may be used for improvement of irrigation practices for lettuce seed production.
dc.format.extent8 páginas
dc.fuente.origenWOS
dc.identifier.doi10.21273/HORTSCI.43.3.837
dc.identifier.eissn2327-9834
dc.identifier.issn0018-5345
dc.identifier.urihttps://doi.org/10.21273/HORTSCI.43.3.837
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79712
dc.identifier.wosidWOS:000256245900218
dc.information.autorucAgronomía e Ing. Forestal;Contreras S;S/I;8151
dc.issue.numero3
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final844
dc.pagina.inicio837
dc.publisherAMER SOC HORTICULTURAL SCIENCE
dc.revistaHORTSCIENCE
dc.rightsregistro bibliográfico
dc.subjectLactuca sativa
dc.subjectgerminability
dc.subjectphotodormancy
dc.subjectseed storability
dc.subjectseed development
dc.subjectharvest index
dc.subjectDIFFERENT GROWTH-STAGES
dc.subjectQUALITY
dc.subjectGERMINATION
dc.subjectSTRESS
dc.subjectDORMANCY
dc.subjectVIGOR
dc.subjectIRRIGATION
dc.subjectGIBBERELLIN
dc.subjectMECHANISM
dc.subjectRESPONSES
dc.subject.ods02 Zero Hunger
dc.subject.ods13 Climate Action
dc.subject.odspa02 Hambre cero
dc.subject.odspa13 Acción por el clima
dc.titleRestricted water availability during lettuce seed production decreases seed yield per plant but increases seed size and water productivity
dc.typeartículo
dc.volumen43
sipa.codpersvinculados8151
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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