Role of light and photosynthesis on the acclimation process of the cyanobacteriumSpirulina platensis to salinity stress

Vonshak, Avigad; Kancharaksa, Nattaya; Bunnag, Boosya; Tanticharoen, Morakot

doi:10.1007/bf02186314

Cited by 69 publications

(35 citation statements)

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“…Vonshak et al (1988Vonshak et al ( , 1995Vonshak et al ( , 1996, Zeng and Vonshak (1998), Lu et al (1998 and Vonshak (1999, 2002) have shown that an increase in salt concentration leads to the decrease of the specific growth rate, photosynthetic efficiency, maximum rate of photosynthesis, phycobilin/Chl a ratio and PSII activity. Conversely, dark respiration activity, compensation points and PSI activity are increased.…”

Section: Discussionmentioning

confidence: 96%

“…In particular, photosynthetic adaptation against salt stress seems to be associated with the modification of energy collector complexes, antennas, or reaction centers. These modifications occur essentially in PS II (Vonshak et al 1996;Lu et al 1998Vonshak 1999, 2002). According to , enhanced respiration rates induce a decrease of energy transfer between phycobilisomes and PSII.…”

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confidence: 96%

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Growth, fluorescence, photosynthetic O2 production and pigment content of salt adapted cultures of Arthrospira (Spirulina) platensis

et al. 2007

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The effect of salt concentration (NaCl) on growth, fluorescence, photosynthetic activities and pigment content of the cyanobacterium Arthrospira platensis has been investigated over 15 days. It has been observed that high NaCl concentration induces an increase of the growth, photosynthetic efficiency (α), phycobilin/chlorophyll ratio and a slight decrease of dark respiration and compensation points. Moreover, high NaCl concentration enhances photosystem II (PSII) activity compared to photosystem I (PSI). Results show that the phycobilin-PSII energy transfer compared to the chlorophyll-PSII (F 695,600 /F 695,440 ) increases. However, data obtained about the maximal efficiency of PSII photochemistry are controversial. Indeed, the Fv/Fm ratio decreases in salt adapted cultures, while at the same time the trapping flux per PSII reaction center (TR 0 /RC) and the probability of electron transport beyond Q A (= 0 ) remain unchanged at the level of the donor and the acceptor sites of PSII. This effect can be attributed to the interference of phycobilin fluorescence with Chl a when performing polyphasic transient measurements.

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Section: Discussionmentioning

confidence: 96%

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confidence: 96%

Growth, fluorescence, photosynthetic O2 production and pigment content of salt adapted cultures of Arthrospira (Spirulina) platensis

et al. 2007

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“…It was suggested that these species might be accidentally carried by the fresh water on the artificial island and acclimatized to marine waters. In particular, salt adaptation of cyanobacterium Spirulina platensis, Microcystis firma and Synechocystis aquatilis had ever been studied worldwidly and those result implied that acclimation to salinity might be of high ecological significance in extending the spread of the cyanobacterium which should be further studied (Hagemann et al, 1989;Vonshak et al, 1996;Hu et al, 2009). Additionally, its occurrence and dominance was also possibly associate with the enhanced nutrient supply and resultant eutrophication in the lagoon water, in particular enrichment of dissolved nitrogen as described earlier (E. Gladfelter, personal communications; Piehler et al, 2004).…”

Section: Dominance Of Brackish Water Cyanobacteria Species In the Lagoonmentioning

confidence: 99%

Occurrence of brackish water phytoplankton species at a closed coral reef in Nansha Islands, South China Sea

Shen

Tan

Huang

et al. 2010

Marine Pollution Bulletin

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“…Vonshak et al (1996) demostraron que se produce una respuesta por parte del alga a un stress salino, las células se adaptan cambiando su composición bioquímica y reduciendo las proteínas y el contenido de clorofila. Estudios han demostrado que el estrés salino (0,8 M de NaCl) en A. platensis, inhibe la actividad del PSII (fotosistema II) de electrones estimulando la actividad del transporte de la PSI (fotosistema I), donde la actividad del PSII de células enteras se redujo hasta 60% durante las primeras 9 h del tratamiento, manteniéndose en ese nivel durante por lo menos 15 h. El estrés salino causó una pérdida del 40% en la eficiencia máxima del PSII y 54% de pérdida con la variable luminosidad (Sudhir et al, 2005).…”

Section: Discussionunclassified

Aplicacion de estrategias nutricionales y su efecto en el crecimiento en el cultivo continuo de Spirulina (Arthrospira platensis)

Rojas

Avila

Parada

2012

lajar

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Aplicación de estrategias nutricionales y su efecto en el crecimiento en el cultivo continuo de Spirulina (Arthrospira platensis) RESUMEN. Se realizó un cultivo continuo de Spirulina (Arthrospira platensis) durante 78 días en un fotobiorreactor tubular de 300 L de volumen. Durante este periodo se registró el crecimiento en biomasa y la respuesta del cultivo a la estrategia de adición del medio nutritivo. Utilizando como base el medio Zarrouk modificado, se elaboraron tres medios: medio inicial (MI), medio crecimiento (SA1+SA2) y medio mantenimiento (SB1+SB2) para las distintas etapas del cultivo. La entrega de los medios se efectuó paulatinamente y de acuerdo a los requerimientos del crecimiento en biomasa (en peso seco) diario del cultivo. La biomasa inicial del cultivo fue de 2,0 g L -1, al día 20 se efectuó la primera cosecha parcial (50%) dando inicio a una nueva etapa del cultivo con una biomasa inicial de 1,7 g L -1 , 20 días después se realizó una segunda cosecha parcial del cultivo, iniciando una tercera etapa de cultivo con una biomasa de 1,6 g L -1 . Los resultados obtenidos al cabo de las cosechas fueron, en promedio, de 3,7; 4,1 y 9,7 g L -1 , respectivamente. El análisis proximal efectuado al final del cultivo continuo indicó un 71,6% de proteína. Palabras clave: Arthrospira platensis, Spirulina, medio nutritivo, crecimiento, cultivo, Chile. Application of nutritional strategies and their effect in continuous culture of Spirulina (Arthrospira platensis)ABSTRACT. A continuous culture of Spirulina (Arthrospira platensis) was performed for 78 in a tubular photobioreactor of 300 L volume. During this period there was growth in biomass and crop response to the strategy of adding the nutrient medium. Using as a basis the modified Zarrouk medium, three nutritive combinations were elaborated: initial medium (MI), growth medium (SA1+SA2) and maintenance medium (SB1+SB2) for different crop stages. The media delivery is affected gradually and in accordance with requirements of growing biomass (dry weight) daily cultivation. The initial crop biomass was 2.0 g L -1, on day 20 of culture was made the first partial harvest (50%) starting a new stage of the crop with an initial biomass of 1.7 g L -1, 20 days after a second crop was partially culture initiating a third culture step with a biomass of 1.6 g L -1 . The results obtained after harvest were, on the average, 3.7; 4.1 and 9.7 g L -1 respectively. The proximal analysis was performed at the end of the continuous cultivation showed a 71.6% of protein content. Keywords: Arthrospira platensis, Spirulina, nutrient medium, growth, culture, Chile. ___________________Corresponding author: Elizabet Rojas (elizabet.rojas@cordunap.cl) INTRODUCCIÓNLa especie Arthrospira platensis, conocida como Spirulina, es una cianobacteria, capaz de convertir la energía del sol en compuestos químicos usando dióxido de carbono y liberando oxígeno. Por sus características, ha adquirido gran importancia en la industria de alimentos, farmacéutica y cosmética, debido a su alto valor nutri...

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Role of light and photosynthesis on the acclimation process of the cyanobacteriumSpirulina platensis to salinity stress

Cited by 69 publications

References 12 publications

Growth, fluorescence, photosynthetic O2 production and pigment content of salt adapted cultures of Arthrospira (Spirulina) platensis

Growth, fluorescence, photosynthetic O2 production and pigment content of salt adapted cultures of Arthrospira (Spirulina) platensis

Occurrence of brackish water phytoplankton species at a closed coral reef in Nansha Islands, South China Sea

Aplicacion de estrategias nutricionales y su efecto en el crecimiento en el cultivo continuo de Spirulina (Arthrospira platensis)

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