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Botanica Marina

Editor-in-Chief: Dring, Matthew J.

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1437-4323
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Volume 49, Issue 4

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The use of chlorophyll fluorescence for monitoring photosynthetic condition of two tank-cultivated red macroalgae using fishpond effluents

Félix L. Figueroa
  • Departamento de Ecología, Facultad de Ciencias, Universidad de Málaga, Campus Universitario de Teatinos s/n, 29071 Málaga, Spain
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/ Rui Santos
  • Algae-Marine Plant Ecology Research Group, Centre of Marine Sciences of Algarve, University of Algarve, Gambelas, 8005-139 Faro, Portugal
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/ Rafael Conde-Álvarez
  • Departamento de Ecología, Facultad de Ciencias, Universidad de Málaga, Campus Universitario de Teatinos s/n, 29071 Málaga, Spain
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/ Leonardo Mata
  • Algae-Marine Plant Ecology Research Group, Centre of Marine Sciences of Algarve, University of Algarve, Gambelas, 8005-139 Faro, Portugal
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/ Juan Luis Gómez Pinchetti
  • Centro de Algología Aplicada, Universidad de Las Palmas de G.C., Muelle de Taliarte s/n, 35214 -Telde, Las Palmas, Canary Islands, Spain
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/ Joana Matos / Pirjo Huovinen
  • Centro de Investigación y Desarrollo de Recursos y Ambientes Costeros “i-mar”, Universidad de Los Lagos, Camino a Chinquihue, km. 6 (Casilla 557), Puerto Montt, Chile
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/ Andreas Schuenhoff
  • Algae-Marine Plant Ecology Research Group, Centre of Marine Sciences of Algarve, University of Algarve, Gambelas, 8005-139 Faro, Portugal
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/ João Silva
  • Algae-Marine Plant Ecology Research Group, Centre of Marine Sciences of Algarve, University of Algarve, Gambelas, 8005-139 Faro, Portugal
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Published Online: 2006-09-12 | DOI: https://doi.org/10.1515/BOT.2006.035

Abstract

In vivo chlorophyll fluorescence measured by pulse amplitude modulated (PAM) fluorometry was used as an indicator of photosynthetic activity in tank-cultivated red algae [Gracilaria cornea and Asparagopsis armata (tetrasporophyte phase, previously known as Falkenbergia rufolanosa)] using effluent seawater from sea bream fishponds (Sparus aurata). Optimal quantum yield of indoor-grown G. cornea did not change during the period analysed (2 months). In contrast, optimal quantum yield decreased drastically in algae transferred from indoor to outdoor conditions. Maximal electron transport rate increased and photosynthetic pigments decreased in algae growing outdoors, indicating an acclimation to high irradiance. After 16 days, chlorophyll fluorescence decreased drastically and recovered partially when algae were transferred again from outdoor to indoor conditions. Falkenbergia rufolanosa was grown at three different biomass densities (4, 6 and 8 g l-1). The effects of three consecutive air compressor failure events on the photosynthetic activity were followed. An apparent degradation of the physiological conditions of the algae (resulting in their bleaching) was observed, concomitant with a strong decrease in the optimal quantum yield. This decrease was higher at algal biomass densities of 4 g l-1 than at 6 or 8 g l-1. Three days after transfer to optimal conditions, i.e., normal aeration conditions, optimal quantum yield reached values around 0.50–0.55, close to the values before stress conditions. The results revealed that the use of chlorophyll fluorescence is a powerful means to rapidly detect different stress situations in integrated cultivation of seaweeds using fishpond effluents. In particular, the optimal quantum yield of algae can be monitored regularly as an early warning of the physiological stress in cultures.

Keywords: Falkenbergia rufolanosa; fishpond effluents; Gracilaria cornea; in vivo chlorophyll fluorescence; physiological stress

About the article

Corresponding author


Received: November 30, 2005

Accepted: May 20, 2006

Published Online: 2006-09-12

Published in Print: 2006-09-01


Citation Information: Botanica Marina, Volume 49, Issue 4, Pages 275–282, ISSN (Online) 1437-4323, ISSN (Print) 0006-8055, DOI: https://doi.org/10.1515/BOT.2006.035.

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