Gas exchange and mass distribution of the cowpea (vigna unguiculata [l.] walp.) under water deficit

Drought tolerance is important for the survival and productivityof plants in environments where drought periods areincreasing as a result of climate variability attributable tonatural causes and climate change caused by human activities.The objective of this study was to evaluate the dynamicsof phot...

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Autores:
Cardona Ayala, Carlos Enrique
Jarma Orozco, Alfredo De Jesús
AraméndizTatis, Hermes
Perneth Montaño, Marvin José
Vergara Córdoba, César Augusto
Tipo de recurso:
Article of journal
Fecha de publicación:
2013
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/72664
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/72664
http://bdigital.unal.edu.co/37138/
Palabra clave:
stomatal conductance
photosynthesis
drought
delayed leaf senescence.
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
id UNACIONAL2_ff760edff4988be777e6e5e739fc7642
oai_identifier_str oai:repositorio.unal.edu.co:unal/72664
network_acronym_str UNACIONAL2
network_name_str Universidad Nacional de Colombia
repository_id_str
dc.title.spa.fl_str_mv Gas exchange and mass distribution of the cowpea (vigna unguiculata [l.] walp.) under water deficit
title Gas exchange and mass distribution of the cowpea (vigna unguiculata [l.] walp.) under water deficit
spellingShingle Gas exchange and mass distribution of the cowpea (vigna unguiculata [l.] walp.) under water deficit
stomatal conductance
photosynthesis
drought
delayed leaf senescence.
title_short Gas exchange and mass distribution of the cowpea (vigna unguiculata [l.] walp.) under water deficit
title_full Gas exchange and mass distribution of the cowpea (vigna unguiculata [l.] walp.) under water deficit
title_fullStr Gas exchange and mass distribution of the cowpea (vigna unguiculata [l.] walp.) under water deficit
title_full_unstemmed Gas exchange and mass distribution of the cowpea (vigna unguiculata [l.] walp.) under water deficit
title_sort Gas exchange and mass distribution of the cowpea (vigna unguiculata [l.] walp.) under water deficit
dc.creator.fl_str_mv Cardona Ayala, Carlos Enrique
Jarma Orozco, Alfredo De Jesús
AraméndizTatis, Hermes
Perneth Montaño, Marvin José
Vergara Córdoba, César Augusto
dc.contributor.author.spa.fl_str_mv Cardona Ayala, Carlos Enrique
Jarma Orozco, Alfredo De Jesús
AraméndizTatis, Hermes
Perneth Montaño, Marvin José
Vergara Córdoba, César Augusto
dc.subject.proposal.spa.fl_str_mv stomatal conductance
photosynthesis
drought
delayed leaf senescence.
topic stomatal conductance
photosynthesis
drought
delayed leaf senescence.
description Drought tolerance is important for the survival and productivityof plants in environments where drought periods areincreasing as a result of climate variability attributable tonatural causes and climate change caused by human activities.The objective of this study was to evaluate the dynamicsof photosynthesis (A), stomatal conductance (gs) and intrinsicwater-use efficiency (WUE=A/gs) as a function of soil moisturecontent over a period of drought and the post-stress recoveryof 14 cowpea genotypes. The studied genotypes tolerated soilmoisture tensions close to -2 Mpa with no permanent wilting.Starting at a soil hydric potential of -0.7 MPa, decreases inphotosynthesis (A), stomatal conductance (gs) and transpiration(E) were evident, as well as an increase in A/gs, whichvaried by genotype. Estimating with regression models allowedfor the discrimination of the degrees of drought tolerancebetween the cultivars. At 4 days after resuming hydration, nosignificant differences were found between the means of A, gs,A/gs and E, suggesting drought tolerance in all genotypes. Thegenotypes: L-047 and L-034 conserved between 4 and 6 leaves,displaying the highest delayed leaf senescence during drought.Furthermore, they presented the highest biomass at 16 dayspost-stress recovery.
publishDate 2013
dc.date.issued.spa.fl_str_mv 2013
dc.date.accessioned.spa.fl_str_mv 2019-07-03T15:25:35Z
dc.date.available.spa.fl_str_mv 2019-07-03T15:25:35Z
dc.type.spa.fl_str_mv Artículo de revista
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url https://repositorio.unal.edu.co/handle/unal/72664
http://bdigital.unal.edu.co/37138/
dc.language.iso.spa.fl_str_mv spa
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dc.relation.spa.fl_str_mv http://revistas.unal.edu.co/index.php/agrocol/article/view/38710
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Revistas electrónicas UN Agronomía Colombiana
Agronomía Colombiana
dc.relation.ispartofseries.none.fl_str_mv Agronomía Colombiana; Vol. 31, núm. 3 (2013); 288-296 Agronomía Colombiana; Vol. 31, núm. 3 (2013); 288-296 2357-3732 0120-9965
dc.relation.references.spa.fl_str_mv Cardona Ayala, Carlos Enrique and Jarma Orozco, Alfredo De Jesús and AraméndizTatis, Hermes and Perneth Montaño, Marvin José and Vergara Córdoba, César Augusto (2013) Gas exchange and mass distribution of the cowpea (vigna unguiculata [l.] walp.) under water deficit. Agronomía Colombiana; Vol. 31, núm. 3 (2013); 288-296 Agronomía Colombiana; Vol. 31, núm. 3 (2013); 288-296 2357-3732 0120-9965 .
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
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dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
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rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
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