Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand
Cacao (Theobroma cacao L.) breeding programmes in Ecuador have focused on obtaining high-yield clones with improved disease resistance. Cacao clones should also have photosynthetic characteristics which support increased productivity. Regarding the weather conditions at the coast of Ecuador, where m...
- Autores:
-
Jaimez, Ramon Eduardo
Amores Puyutaxi, Freddy
Vasco, Alfonso
Loor, Rey Gastón
Tarqui, Omar
Quijano, Grisnel
Jimenez, Juan Carlos
Tezara, Wilmer
- Tipo de recurso:
- Article of journal
- Fecha de publicación:
- 2018
- Institución:
- Universidad Nacional de Colombia
- Repositorio:
- Universidad Nacional de Colombia
- Idioma:
- spa
- OAI Identifier:
- oai:repositorio.unal.edu.co:unal/68163
- Acceso en línea:
- https://repositorio.unal.edu.co/handle/unal/68163
http://bdigital.unal.edu.co/69196/
- Palabra clave:
- 57 Ciencias de la vida; Biología / Life sciences; biology
cacao yield
chlorophyll fluorescence
CO2 assimilation rate
gas exchange.
Fluorescencia clorofila
intercambio gases
producción de cacao
tasa de asimilación de CO2.
- Rights
- openAccess
- License
- Atribución-NoComercial 4.0 Internacional
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Universidad Nacional de Colombia |
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|
dc.title.spa.fl_str_mv |
Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand |
title |
Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand |
spellingShingle |
Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand 57 Ciencias de la vida; Biología / Life sciences; biology cacao yield chlorophyll fluorescence CO2 assimilation rate gas exchange. Fluorescencia clorofila intercambio gases producción de cacao tasa de asimilación de CO2. |
title_short |
Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand |
title_full |
Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand |
title_fullStr |
Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand |
title_full_unstemmed |
Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand |
title_sort |
Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand |
dc.creator.fl_str_mv |
Jaimez, Ramon Eduardo Amores Puyutaxi, Freddy Vasco, Alfonso Loor, Rey Gastón Tarqui, Omar Quijano, Grisnel Jimenez, Juan Carlos Tezara, Wilmer |
dc.contributor.author.spa.fl_str_mv |
Jaimez, Ramon Eduardo Amores Puyutaxi, Freddy Vasco, Alfonso Loor, Rey Gastón Tarqui, Omar Quijano, Grisnel Jimenez, Juan Carlos Tezara, Wilmer |
dc.subject.ddc.spa.fl_str_mv |
57 Ciencias de la vida; Biología / Life sciences; biology |
topic |
57 Ciencias de la vida; Biología / Life sciences; biology cacao yield chlorophyll fluorescence CO2 assimilation rate gas exchange. Fluorescencia clorofila intercambio gases producción de cacao tasa de asimilación de CO2. |
dc.subject.proposal.spa.fl_str_mv |
cacao yield chlorophyll fluorescence CO2 assimilation rate gas exchange. Fluorescencia clorofila intercambio gases producción de cacao tasa de asimilación de CO2. |
description |
Cacao (Theobroma cacao L.) breeding programmes in Ecuador have focused on obtaining high-yield clones with improved disease resistance. Cacao clones should also have photosynthetic characteristics which support increased productivity. Regarding the weather conditions at the coast of Ecuador, where most of the year there are overcasts and low air evaporative demand, there is the possibility to grow cacao without overhead shade. This study focused on the photosynthetic response at two different photosynthetic photon flux densities (PPFD) of Ecuadorian cacao clones. Seven-year old cacao clones were evaluated: eight clones of Nacional type and two commercial clones (CCN 51 and EET 103), used as controls. All clones showed an increase of 35 % on average in net photosynthetic rate (A)with increasing PPFD from the light saturation point for cacao (i.e. 400 µmol m-2 s-1) to high values (1000 µmol m-2 s-1). Such light responsiveness in A has not been reported before. Higher A was associated with higher apparent electron transport rate, while high stomatal conductance was maintained under both PPFD conditions. Under high PPFD, low non-photochemical quenching values were found, suggesting low energy dissipation. All clones showed high maximum quantum yields of PSII (Fv/Fm), suggesting the absence of damage of the photochemical system. |
publishDate |
2018 |
dc.date.issued.spa.fl_str_mv |
2018-01-01 |
dc.date.accessioned.spa.fl_str_mv |
2019-07-03T06:01:40Z |
dc.date.available.spa.fl_str_mv |
2019-07-03T06:01:40Z |
dc.type.spa.fl_str_mv |
Artículo de revista |
dc.type.coar.fl_str_mv |
http://purl.org/coar/resource_type/c_2df8fbb1 |
dc.type.driver.spa.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.version.spa.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.coar.spa.fl_str_mv |
http://purl.org/coar/resource_type/c_6501 |
dc.type.coarversion.spa.fl_str_mv |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
dc.type.content.spa.fl_str_mv |
Text |
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http://purl.org/redcol/resource_type/ART |
format |
http://purl.org/coar/resource_type/c_6501 |
status_str |
publishedVersion |
dc.identifier.issn.spa.fl_str_mv |
ISSN: 1900-1649 |
dc.identifier.uri.none.fl_str_mv |
https://repositorio.unal.edu.co/handle/unal/68163 |
dc.identifier.eprints.spa.fl_str_mv |
http://bdigital.unal.edu.co/69196/ |
identifier_str_mv |
ISSN: 1900-1649 |
url |
https://repositorio.unal.edu.co/handle/unal/68163 http://bdigital.unal.edu.co/69196/ |
dc.language.iso.spa.fl_str_mv |
spa |
language |
spa |
dc.relation.spa.fl_str_mv |
https://revistas.unal.edu.co/index.php/actabiol/article/view/64962 |
dc.relation.ispartof.spa.fl_str_mv |
Universidad Nacional de Colombia Revistas electrónicas UN Acta Biológica Colombiana Acta Biológica Colombiana |
dc.relation.references.spa.fl_str_mv |
Jaimez, Ramon Eduardo and Amores Puyutaxi, Freddy and Vasco, Alfonso and Loor, Rey Gastón and Tarqui, Omar and Quijano, Grisnel and Jimenez, Juan Carlos and Tezara, Wilmer (2018) Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand. Acta Biológica Colombiana, 23 (1). pp. 95-103. ISSN 1900-1649 |
dc.rights.spa.fl_str_mv |
Derechos reservados - Universidad Nacional de Colombia |
dc.rights.coar.fl_str_mv |
http://purl.org/coar/access_right/c_abf2 |
dc.rights.license.spa.fl_str_mv |
Atribución-NoComercial 4.0 Internacional |
dc.rights.uri.spa.fl_str_mv |
http://creativecommons.org/licenses/by-nc/4.0/ |
dc.rights.accessrights.spa.fl_str_mv |
info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Atribución-NoComercial 4.0 Internacional Derechos reservados - Universidad Nacional de Colombia http://creativecommons.org/licenses/by-nc/4.0/ http://purl.org/coar/access_right/c_abf2 |
eu_rights_str_mv |
openAccess |
dc.format.mimetype.spa.fl_str_mv |
application/pdf |
dc.publisher.spa.fl_str_mv |
Universidad Nacional de Colombia - Sede Bogotá - Faculdad de Ciencias - Departamento de Biología |
institution |
Universidad Nacional de Colombia |
bitstream.url.fl_str_mv |
https://repositorio.unal.edu.co/bitstream/unal/68163/1/64962-365640-2-PB.pdf https://repositorio.unal.edu.co/bitstream/unal/68163/2/64962-365640-2-PB.pdf.jpg |
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Repositorio Institucional Universidad Nacional de Colombia |
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spelling |
Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Jaimez, Ramon Eduardo9acfd62a-f99a-446e-9fd0-b5ed58b45b74300Amores Puyutaxi, Freddydf873999-ace5-4ad7-9964-094b5b3e4c5c300Vasco, Alfonsob5b3453b-8094-423f-92af-5bd2e207ce8d300Loor, Rey Gastónffb67560-2077-4cf5-b4d1-f05fe421daa0300Tarqui, Omar31a29617-73d5-41cb-a557-c7b73280940e300Quijano, Grisnel990331d2-451a-461a-afd8-2e6587c5bf54300Jimenez, Juan Carlosd53a257c-b3ae-4929-9593-a3bcf67e4e75300Tezara, Wilmerbb06a81d-6f47-4eac-a55e-3aa0e7510ff43002019-07-03T06:01:40Z2019-07-03T06:01:40Z2018-01-01ISSN: 1900-1649https://repositorio.unal.edu.co/handle/unal/68163http://bdigital.unal.edu.co/69196/Cacao (Theobroma cacao L.) breeding programmes in Ecuador have focused on obtaining high-yield clones with improved disease resistance. Cacao clones should also have photosynthetic characteristics which support increased productivity. Regarding the weather conditions at the coast of Ecuador, where most of the year there are overcasts and low air evaporative demand, there is the possibility to grow cacao without overhead shade. This study focused on the photosynthetic response at two different photosynthetic photon flux densities (PPFD) of Ecuadorian cacao clones. Seven-year old cacao clones were evaluated: eight clones of Nacional type and two commercial clones (CCN 51 and EET 103), used as controls. All clones showed an increase of 35 % on average in net photosynthetic rate (A)with increasing PPFD from the light saturation point for cacao (i.e. 400 µmol m-2 s-1) to high values (1000 µmol m-2 s-1). Such light responsiveness in A has not been reported before. Higher A was associated with higher apparent electron transport rate, while high stomatal conductance was maintained under both PPFD conditions. Under high PPFD, low non-photochemical quenching values were found, suggesting low energy dissipation. All clones showed high maximum quantum yields of PSII (Fv/Fm), suggesting the absence of damage of the photochemical system.Los programas de mejoramiento de cacao (Theobroma cacao L.) en Ecuador se han centrado en la obtención de clones de alto rendimiento con mayor resistencia a las enfermedades. Estos clones también deben tener características fotosintéticas que apoyen una mayor productividad. En las condiciones climáticas en la costa de Ecuador, donde la mayor parte del año hay alta densidad de nubes y baja demanda evaporativa, existe la posibilidad de cultivar cacao sin sombra. Este estudio se centró en la respuesta fotosintética de clones de cacao del Ecuador en dos diferentes densidades de flujo de fotones fotosintéticos (PPFD). Se evaluaron diez clones de cacao de siete años de edad: ocho clones de tipo Nacional recientemente desarrollados por el Instituto Nacional de investigaciones Agropecuarias, y dos clones comerciales utilizados como controles (CCN 51 y EET 103). Todos los clones de cacao mostraron un aumento del 35 % en promedio en la tasa fotosintética neta (A) con el incremento del PPFD desde el punto de saturación de luz para el cacao (400 μmol m -2 s -1) hasta valores altos (1000 μmol m -2 s- 1). Dicha respuesta de A a estas condiciones de luz alta no se ha reportado en cacao. La tasa fotosintética neta se asoció con una mayor velocidad aparente de transporte de electrones (J), mientras que la alta conductancia estomática (gs) se mantuvo en ambas condiciones de PPFD. En condiciones de alto PPFD, se encontraron bajos valores del coeficiente de extinción no fotoquímico (NPQ), lo que sugiere una baja disipación de energía, además de presentarse altos rendimientos cuánticos máximos de PSII (Fv / Fm), indicando la ausencia de daño del sistema fotoquímico.application/pdfspaUniversidad Nacional de Colombia - Sede Bogotá - Faculdad de Ciencias - Departamento de Biologíahttps://revistas.unal.edu.co/index.php/actabiol/article/view/64962Universidad Nacional de Colombia Revistas electrónicas UN Acta Biológica ColombianaActa Biológica ColombianaJaimez, Ramon Eduardo and Amores Puyutaxi, Freddy and Vasco, Alfonso and Loor, Rey Gastón and Tarqui, Omar and Quijano, Grisnel and Jimenez, Juan Carlos and Tezara, Wilmer (2018) Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand. Acta Biológica Colombiana, 23 (1). pp. 95-103. ISSN 1900-164957 Ciencias de la vida; Biología / Life sciences; biologycacao yieldchlorophyll fluorescenceCO2 assimilation rategas exchange.Fluorescencia clorofilaintercambio gasesproducción de cacaotasa de asimilación de CO2.Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demandArtículo de revistainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/ARTORIGINAL64962-365640-2-PB.pdfapplication/pdf370819https://repositorio.unal.edu.co/bitstream/unal/68163/1/64962-365640-2-PB.pdfaca253eb42ed8ca89c3cac5b497a4c2eMD51THUMBNAIL64962-365640-2-PB.pdf.jpg64962-365640-2-PB.pdf.jpgGenerated Thumbnailimage/jpeg9944https://repositorio.unal.edu.co/bitstream/unal/68163/2/64962-365640-2-PB.pdf.jpg436aa7959b6a7d8d53eeae86f9748529MD52unal/68163oai:repositorio.unal.edu.co:unal/681632024-05-25 23:09:20.093Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co |