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dc.creatorRodríguez-Pérez, Loyla
dc.creatorÑústez L., Carlos Eduardo
dc.creatorMoreno F., Liz Patricia
dc.date.accessioned2019-07-03T06:07:30Z
dc.date.available2019-07-03T06:07:30Z
dc.date.created2017-05-01
dc.identifierISSN: 2357-3732
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/68200
dc.descriptionThis study evaluated the effect of water deficit on the physiological response and yield of three Andean potato cultivars. Leaf water potential (Ψw), soil matric potential (SMP), photosynthesis (A), stomatal conductance (gs), transpiration (E), intrinsic water use efficiency (WUEi), leaf temperature (LT), chlorophyll fluorescence parameters, chlorophyll (Chl), carotenoids (Car), electrolyte leakage (EL), growth and yield (Y). Parameters were determined in well-watered (WW) and drought-stressed (DS) plants. The three DS cultivars showed a decrease in leaf Ψw from the first day of treatment and reached values close to -2.00 MPa 4 days after treatment (DAT) for the Diacol Capiro (DC) cultivar, 5 DAT for the Pastusa Suprema (PS) cultivar and 6 DAT for the Esmeralda (Es) cultivar. The values of A, gs and E in the DS cultivars decreased from the first DAT. The LT reached the highest values when gs showed the lowest values for the three DS cultivars. WUEi was higher in Es under DS plants but lower in DC under DS. The PSII photochemical efficiency (Fv/Fm) showed values greater than 0.8 for all DS cultivars under DS, suggesting the absence of non-stomatal limitations for A. The Chl content increased in the Es cultivar under DS from 5 to 7 DAT compared to WW plants. Carotenoids (Ca) contents, the Car/Chl ratio, and EL increased in the three DS cultivars. There were no differences in yield and growth parameters between WW and DS cultivars. These results suggest that the three cultivars developed mechanisms to overcome the stress. One of these mechanisms could be the early synthesis of Car, which may maintain photosystem II function under water stress.
dc.formatapplication/pdf
dc.publisherUniversidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias Agrarias
dc.relationhttps://revistas.unal.edu.co/index.php/agrocol/article/view/65901
dc.relation.ispartofUniversidad Nacional de Colombia Revistas electrónicas UN Agronomía Colombiana
dc.relation.ispartofAgronomía Colombiana
dc.subjectcarotenoid/chlorophyll ratio
dc.subjectelectrolyte leakage
dc.subjectphotoprotection
dc.subjectwater deficit tolerance
dc.subjectleaf temperature.
dc.subject.ddc63 Agricultura y tecnologías relacionadas / Agriculture
dc.titleDrought stress affects physiological parameters but not tuber yield in three Andean potato (iSolanum tuberosum/i 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.bibliographicCitationRodríguez-Pérez, Loyla and Ñústez L., Carlos Eduardo and Moreno F., Liz Patricia (2017) Drought stress affects physiological parameters but not tuber yield in three Andean potato (iSolanum tuberosum/i L.) cultivars. Agronomía Colombiana, 35 (2). pp. 158-170. ISSN 2357-3732
dc.identifier.eprintshttp://bdigital.unal.edu.co/69233/


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