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dc.creatorRestrepo, Hermann
dc.creatorGarces, Gabriel
dc.date.accessioned2019-07-03T15:00:31Z
dc.date.available2019-07-03T15:00:31Z
dc.date.created2013
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/72227
dc.descriptionA study was carried out to assess the effect of two irradiance levels (100 and 50% natural light) at three different growth stages on yield and physiological characteristics of two rice cultivars (Fedearroz 50 and Fedearroz 733). The plants were exposed to low irradiance for 5 days consecutive by using black net cloth (about 50% of normal) at the panicle primordium, flowering and grain filling stages. The obtained results showed that the leaf chlorophyll content (SPAD readings) was higher in rice leaves under low irradiance. The chlorophyll content from the shade treatment apparently remained constant until the grain filling phase, then decreased slightly in the 'F50' rice plants and remarkably in the 'F733' plants. Stomatal conductance (gs) was negatively affected by shading, with the effect being more adverse in the 'F733' plants. At the flowering and grain filling phases, grain yield was reduced by the low light treatments by around ~20% in the 'F50' plants. While, in 'F733', they were only affected by shading at the grain filling stage, causing a decrease of around 25%. These results seem to indicate that ‘F773’ may have a better capacity for partitioning dry matter than ‘F50’ in spite of the fact that the gas exchange characteristics were conditioned by low irradiance conditions at the reproductive and ripening phases.
dc.formatapplication/pdf
dc.publisherUniversidad Nacional de Colombia, Facultad de Agronomía, Centro Editorial
dc.relationhttp://revistas.unal.edu.co/index.php/agrocol/article/view/37650
dc.relation.ispartofUniversidad Nacional de Colombia Revistas electrónicas UN Agronomía Colombiana
dc.relation.ispartofAgronomía Colombiana
dc.relation.ispartofseriesAgronomía Colombiana; Vol. 31, núm. 2 (2013); 195-200 Agronomía Colombiana; Vol. 31, núm. 2 (2013); 195-200 2357-3732 0120-9965
dc.subjectshading
dc.subjectyield
dc.subjectstomatal conductance
dc.subjectgrowth stages.
dc.titleEvaluation of low light intensity at three phenological stages in the agronomic and physiological responses of two rice (oryza sativa l.) cultivars
dc.typeinfo:eu-repo/semantics/article
dc.type.spaArtículo - Article
dc.type.hasversioninfo:eu-repo/semantics/publishedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.bibliographicCitationRestrepo, Hermann and Garces, Gabriel (2013) Evaluation of low light intensity at three phenological stages in the agronomic and physiological responses of two rice (oryza sativa l.) cultivars. Agronomía Colombiana; Vol. 31, núm. 2 (2013); 195-200 Agronomía Colombiana; Vol. 31, núm. 2 (2013); 195-200 2357-3732 0120-9965 .
dc.identifier.eprintshttp://bdigital.unal.edu.co/36700/


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