Photosynthetic performance of Chlorella vulgaris R117 mass culture is moderated by diurnal oxygen gradients in an outdoor thin layer cascade
Dissolved oxygen concentration is a critical point for microalgae in large scale cultivation systems. Highly productive cultures inevitably generate a build-up of oxygen gradients along the reactor which can affect photosynthetic performance. In this study, a fast-growing strain of Chlorella vulga...
| Otros Autores: | , , , , , , , |
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| Formato: | Artículo |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2021rearte.pdf LINK AL EDITOR |
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| 024 | |a 10.1016/j.algal.2020.102176 | ||
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| 245 | |a Photosynthetic performance of Chlorella vulgaris R117 mass culture is moderated by diurnal oxygen gradients in an outdoor thin layer cascade | ||
| 520 | |a Dissolved oxygen concentration is a critical point for microalgae in large scale cultivation systems. Highly productive cultures inevitably generate a build-up of oxygen gradients along the reactor which can affect photosynthetic performance. In this study, a fast-growing strain of Chlorella vulgaris R117 was cultured outdoors in a thin-layer cascade during a one-week trial reaching a biomass productivity of 4 g DW L− 1 d− 1 (27 g DW m− 2 d− 1 ). High photosynthetic activity led to oxygen oversaturation of up to 400% in some parts along the culture units at midday. The aim was to examine the effect of high dissolved oxygen concentration on diurnal changes in the photosynthetic performance and growth of the Chlorella culture using multi-technique approach. Photosynthetic activity of Chlorella R117 culture was estimated in situ and ex situ using oxygen production and in vivo Chl a fluorescence measurements, which showed good correlation. The rates of electron transport and of oxygen production were related, but the values of the μmolelectrons/µmolO2 ratio was higher than predicted, suggesting the probable involvement of electron and oxygen consuming processes such as photorespiration and Mehler reaction. These processes probably function as photoprotective mechanisms, since no photodamage was observed in the Chlorella R-117 cultures. Depression (down-regulation) of photosynthetic activity due to the exposition to high dissolved oxygen concentration along the cascade area over time was observed. The usefulness of on-line measurements was demonstrated to obtain immediate and in-situ information on the physiological status of the culture. This data can be used in models of operation control for large-scale microalgae production units. | ||
| 650 | |2 Agrovoc |9 26 | ||
| 653 | |a CHLOROPHYLL FLUORESCENCE MONITORING | ||
| 653 | |a OUTDOOR MASS CULTIVATION | ||
| 653 | |a PSII DOWN REGULATION | ||
| 653 | |a OXYGEN PRODUCTION | ||
| 653 | |a PHOTOADAPTATION | ||
| 700 | 1 | |9 31229 |a Rearte, Tomás Agustín |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Recursos Naturales y Ambiente. Buenos Aires, Argentina. |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. | |
| 700 | 1 | |a Celis Plá, Paula S.M. |u University of Playa Ancha. Center of Advanced Studies. Laboratory of Coastal Environmental Research. Valparaíso, Chile. |u University of Playa Ancha. Vicerrectoría de Investigación Postgrado e Innovación. HUB-AMBIENTAL UPLA. Valparaíso, Chile. |9 73573 | |
| 700 | 1 | |a Neori, Amir |u University of Haifa. The Leon H. Charney School of Marine Sciences. Marine Biology Department. Morris Kahn Marine Research Station. Israel. |u The Interuniversity Institute for Marine Sciences. Eilat, Israel. |9 73574 | |
| 700 | 1 | |a Masojídek, Jirí |u Czech Academy of Sciences. Centre Algatech. Institute of Microbiology. Trebon, Czech Republic. |u University of South Bohemia. Faculty of Science. Ceske Budêjovice, Czech Republic. |9 73575 | |
| 700 | 1 | |a Torzillo, Giuseppe |u Department of Biology Agriculture and Food Sciences. Institute of Bioeconomy. CNR. Florence, Italy. |u Universidad de Costa Rica. Escuela de Biología. CIMAR. San Pedro, de Montes de Oca, Costa Rica. |9 73576 | |
| 700 | 1 | |a Gómez Serrano, Cintia |u University of Almeria. Department of Chemical Engineering. Almería, Spain. |9 73577 | |
| 700 | 1 | |a Silva Benavides, Ana Margarita |u Universidad de Costa Rica. Escuela de Biología. CIMAR. San Pedro, de Montes de Oca, Costa Rica. |9 73578 | |
| 700 | 1 | |a Alvarez Gómez, Félix |u Malaga University. Research Institute for Blue biotechnology and development (IBYDA). Malaga, Spain. |9 73579 | |
| 773 | 0 | |t Algal Research |g Vol.54 (2021), art.102176, 13 p., grafs., tbls., fot. | |
| 856 | |f 2021rearte |i en reservorio |q application/pdf |u http://ri.agro.uba.ar/files/intranet/articulo/2021rearte.pdf |x ARTI202204 | ||
| 856 | |u http://www.elsevier.com |z LINK AL EDITOR | ||
| 942 | |c ARTICULO | ||
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| 976 | |a AAG | ||