Sowing density effect on photosynthetic activity of Chenopodium quinoa var. CICA (“quínoa”) in the Argentinean Northwest.
Sowing density effect on photosynthetic activity of Chenopodium quinoa var. CICA (“quinoa”) in the Argentinean Northwest. Quinoa crop to obtain grain for human consumption has begun to spread in the region of Calchaquíes Valleys (Tucumán, Argentina) over 2,000 m asl. Because quinoa is a new alternat...
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Sociedad Argentina de Botánica
2018
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I10-R10-article-198602019-12-14T13:46:53Z Sowing density effect on photosynthetic activity of Chenopodium quinoa var. CICA (“quínoa”) in the Argentinean Northwest. Efecto de la densidad de siembra sobre la actividad fotosintética en Chenopodium quinoa var. CICA (“quínoa”) en el Noroeste Argentino. González, Juan A. Erazzú, Luis E. Buedo, Sebastián E. Prado, Fernando E. Chenopodium densidad de siembra fotosíntesis pigmentos. Chenopodium sowing density photosynthesis pigments. Sowing density effect on photosynthetic activity of Chenopodium quinoa var. CICA (“quinoa”) in the Argentinean Northwest. Quinoa crop to obtain grain for human consumption has begun to spread in the region of Calchaquíes Valleys (Tucumán, Argentina) over 2,000 m asl. Because quinoa is a new alternative crop, must be carried out ecophysiological and agronomic studies to get its adequate management. In this study the effect of sowing density on the photosynthetic response against different photon flux densities (DFFF) was analyzed in order to calculate the maximum assimilation (A max ), light saturation point (PSL), light compensation point (PCL), photosynthetic efficiency (Ø CO2 ) and dark respiration (R n ) values. Data in relation to net photosynthetis assimilacion (A n ), stomatal conductance (g s ), leaf transpiration (T r ), internal CO 2 concentration (C i ), carboxilation capacity (A n /C i ) and intrinsec water use efficiency (EUA i ) are provided. In addition, photosynthetic pigment (chlorophylls and carotenoids) and protective one (absorbance at 305 nm) were measured. This study demonstrates that gas exchange parameters are directly correlated with morphology, foliar anatomy and grains yield and that the sowing density has a direct effect on them. El cultivo de la quinoa para la obtención de granos para la alimentación humana ha comenzado a extenderse en la región de los Valles Calchaquíes (Tucumán, Argentina) por arriba de los 2.000 m snm. Tratándose de un cultivo nuevo para dicha región son necesarios los estudios ecofisiológicos y agronómicos para lograr un manejo adecuado de esta nueva alternativa productiva. En este estudio se analiza el efecto de la densidad de siembra sobre la respuesta fotosintética frente a diferentes densidades de flujo fotosintético de fotones (DFFF) estableciéndose los valores de asimilación máxima (A max), punto de saturación lumínica (PSL), punto de compensación lumínica (PCL), eficiencia fotosintética (Ø CO2 ) y respiración nocturna (R n ). Por otro lado, se roporcionan datos relacionados con la asimilación fotosintética neta (A n ), conductancia estomática (g s ), transpiración foliar (T r ), concentración interna de CO 2 (C i ), capacidad de carboxilación (A n /C i ) y eficiencia intrínseca en el uso del agua (EUA i ). Asimismo se brindan datos sobre el contenido de pigmentos fotosintéticos (clorofilas y carotenoides) y otros compuestos protectores (que absorben a los 305 nm). Este estudio demuestra que los parámetros del intercambio de gases están directamente correlacionados con la morfología, anatomía foliar y rendimiento en granos y que la densidad de siembra tiene un efecto directo sobre ellos. Sociedad Argentina de Botánica 2018-04-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo original application/pdf https://revistas.unc.edu.ar/index.php/BSAB/article/view/19860 Boletín de la Sociedad Argentina de Botánica (Journal of the Argentine Botanical Society; Vol. 53 No. 1 (2018): March; 21-29 Boletín de la Sociedad Argentina de Botánica; Vol. 53 Núm. 1 (2018): Marzo; 21-29 Boletín de la Sociedad Argentina de Botánica; v. 53 n. 1 (2018): Marzo; 21-29 1851-2372 0373-580X 10.31055/1851.2372.v53.n1 spa https://revistas.unc.edu.ar/index.php/BSAB/article/view/19860/19581 Derechos de autor 2018 Boletín de la Sociedad Argentina de Botánica |
institution |
Universidad Nacional de Córdoba |
institution_str |
I-10 |
repository_str |
R-10 |
container_title_str |
Revistas de la UNC |
language |
Español |
format |
Artículo revista |
topic |
Chenopodium densidad de siembra fotosíntesis pigmentos. Chenopodium sowing density photosynthesis pigments. |
spellingShingle |
Chenopodium densidad de siembra fotosíntesis pigmentos. Chenopodium sowing density photosynthesis pigments. González, Juan A. Erazzú, Luis E. Buedo, Sebastián E. Prado, Fernando E. Sowing density effect on photosynthetic activity of Chenopodium quinoa var. CICA (“quínoa”) in the Argentinean Northwest. |
topic_facet |
Chenopodium densidad de siembra fotosíntesis pigmentos. Chenopodium sowing density photosynthesis pigments. |
author |
González, Juan A. Erazzú, Luis E. Buedo, Sebastián E. Prado, Fernando E. |
author_facet |
González, Juan A. Erazzú, Luis E. Buedo, Sebastián E. Prado, Fernando E. |
author_sort |
González, Juan A. |
title |
Sowing density effect on photosynthetic activity of Chenopodium quinoa var. CICA (“quínoa”) in the Argentinean Northwest. |
title_short |
Sowing density effect on photosynthetic activity of Chenopodium quinoa var. CICA (“quínoa”) in the Argentinean Northwest. |
title_full |
Sowing density effect on photosynthetic activity of Chenopodium quinoa var. CICA (“quínoa”) in the Argentinean Northwest. |
title_fullStr |
Sowing density effect on photosynthetic activity of Chenopodium quinoa var. CICA (“quínoa”) in the Argentinean Northwest. |
title_full_unstemmed |
Sowing density effect on photosynthetic activity of Chenopodium quinoa var. CICA (“quínoa”) in the Argentinean Northwest. |
title_sort |
sowing density effect on photosynthetic activity of chenopodium quinoa var. cica (“quínoa”) in the argentinean northwest. |
description |
Sowing density effect on photosynthetic activity of Chenopodium quinoa var. CICA (“quinoa”) in the Argentinean Northwest. Quinoa crop to obtain grain for human consumption has begun to spread in the region of Calchaquíes Valleys (Tucumán, Argentina) over 2,000 m asl. Because quinoa is a new alternative crop, must be carried out ecophysiological and agronomic studies to get its adequate management. In this study the effect of sowing density on the photosynthetic response against different photon flux densities (DFFF) was analyzed in order to calculate the maximum assimilation (A max ), light saturation point (PSL), light compensation point (PCL), photosynthetic efficiency (Ø CO2 ) and dark respiration (R n ) values. Data in relation to net photosynthetis assimilacion (A n ), stomatal conductance (g s ), leaf transpiration (T r ), internal CO 2 concentration (C i ), carboxilation capacity (A n /C i ) and intrinsec water use efficiency (EUA i ) are provided. In addition, photosynthetic pigment (chlorophylls and carotenoids) and protective one (absorbance at 305 nm) were measured. This study demonstrates that gas exchange parameters are directly correlated with morphology, foliar anatomy and grains yield and that the sowing density has a direct effect on them. |
publisher |
Sociedad Argentina de Botánica |
publishDate |
2018 |
url |
https://revistas.unc.edu.ar/index.php/BSAB/article/view/19860 |
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first_indexed |
2022-08-20T01:20:57Z |
last_indexed |
2022-08-20T01:20:57Z |
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