Producción de biomasa de la microalga marina Chroomonas sp., en función del pH, intensidad luminosa y salinidad
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Date
2002
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Biomass production of the marine microalga Chroomonas sp., as a function of pH, luminic intensity, and salinityAbstract
Se reporta la caracterización de la microalga marina Chroomonas, aislada de una laguna salina ubicada al Norte de Maracaibo, Estado Zulia, Venezuela. El crecimiento y producción de pigmentos en cultivos discontinuos, se evaluó en función de la salinidad (5, 10, 35, 50, 70 y 100 ppm), intensidad luminosa (39, 78, 117 y 156 µmol quanta.m-2.s-1) y pH (5.0, 5.5, 6.0, 7.0, 8.0 y 9.0). La mayor densidad celular de 117.99±2.62x106 cel.ml-1, se alcanzó a 35 ppm, 156 µmol quanta.m-2.s-1 de intensidad luminosa y a un pH entre 6.0 y 8.0. El contenido celular de clorofila total y carotenoides se incrementa con la salinidad hasta 100 ppm, con 246.55±61.8 y 69.79±18.19 fg.cel-1 respectivamente. Chroomonas sp. demostró alta capacidad de producción de biomasa y de pigmentos cuando se cultivó a un volumen de 2.0 l en régimen semicontinuo y a una tasa de renovación diaria del 30 %. La productividad celular fue de 4.31x109 cel.l-1d-1; mientras que la de clorofila total y carotenoides de 1.4 mg.l-1.d-1 y 0.48 mg.l-1.d-1, respectivamente. Estos resultados indican que esta microalga planctónica podría ser utilizada diariamente como alimento vivo en acuicultura y para la producción de biomasa microalgal y/o pigmentos.We report the characterization of a marine microalga of the genus Chroomonas, isolated from a salt lagoon located to the north of Maracaibo, Zulia State, Venezuela. We evaluated the growth and the pigment production in discontinuous culture at different salinites (5, 10, 35, 50, 70 Y 100 ppm),Iight intensites (39,78,117 and 156 µmol quanta.m-2.s-1) and pH (5.0,5.5,6.0,7.0, 8.0 and 9.0). The highest cellular density, 117.99±2.62x106 cel.ml-1, was reached at 35ppm, 156 µmol quanta.m-2.s-1 of light intensity and a pH between 6.0 and 8.0. The cellular content of total chlorophyll and carotenoids increased with the salinity up to 100 ppm, with amounts of 246.55±61.8 and 69.79±18.19 fg.cel-1 respectively. The cellular productivity 4.31x109 cel.l-1d-1 was obteined when the microalga, was grown in semi-continuous culture, at a 2.0 I volume and at a daily renewal rate of 30 % (v/v). The total amount of chlorophyll and carotenoids 1.4 mg.l-1.d-1 and 0.48 mg.l-1.d-1 respectively. This results indicate that this planktonic microalga could be used as daily live food for larvae in aquaculture and for the production of microalgaI biomass and/or pigments.
Journal
Boletín de investigaciones marinas y costerasVolume
31Publisher or University
INVEMAR - Santa Marta, ColombiaResource/Dataset Location
http://www.invemar.org.co/siad/descarga.jsp?type=documento&id=608Collections