TY - JOUR
T1 - Physiological and biochemical responses of Chlorella vulgaris to Congo red
AU - Hernández-Zamora, Miriam
AU - Perales-Vela, Hugo Virgilio
AU - Flores-Ortíz, César Mateo
AU - Cañizares-Villanueva, Rosa Olivia
N1 - Funding Information:
Hernández-Zamora M., received a post-graduate scholarship from Consejo Nacional de Ciencia y Tecnología (Grant no. 204491 ) for her doctoral studies.
PY - 2014/10
Y1 - 2014/10
N2 - Extensive use of synthetic dyes in many industrial applications releases large volumes of wastewater. Wastewaters from dying industries are considered hazardous and require careful treatment prior to discharge into receiving water bodies. Dyes can affect photosynthetic activities of aquatic flora and decrease dissolved oxygen in water. The aim of this study was to evaluate the effect of Congo red on growth and metabolic activity of Chlorella vulgaris after 96h exposure. Exposure of the microalga to Congo red reduced growth rate, photosynthesis and respiration. Analysis of chlorophyll a fluorescence emission showed that the donor side of photosystem II was affected at high concentrations of Congo red. The quantum yield for electron transport (φEo), the electron transport rate (ETR) and the performance index (PI) also decreased. The reduction in the ability to absorb and use the quantum energy increased non-photochemical (NPQ) mechanisms for thermal dissipation. Overall, Congo red affects growth and metabolic activity in photosynthetic organisms in aquatic environments.
AB - Extensive use of synthetic dyes in many industrial applications releases large volumes of wastewater. Wastewaters from dying industries are considered hazardous and require careful treatment prior to discharge into receiving water bodies. Dyes can affect photosynthetic activities of aquatic flora and decrease dissolved oxygen in water. The aim of this study was to evaluate the effect of Congo red on growth and metabolic activity of Chlorella vulgaris after 96h exposure. Exposure of the microalga to Congo red reduced growth rate, photosynthesis and respiration. Analysis of chlorophyll a fluorescence emission showed that the donor side of photosystem II was affected at high concentrations of Congo red. The quantum yield for electron transport (φEo), the electron transport rate (ETR) and the performance index (PI) also decreased. The reduction in the ability to absorb and use the quantum energy increased non-photochemical (NPQ) mechanisms for thermal dissipation. Overall, Congo red affects growth and metabolic activity in photosynthetic organisms in aquatic environments.
KW - Chlorella vulgaris
KW - Chlorophyll a fluorescence
KW - Congo red
KW - JIP-test
KW - Photosynthesis
KW - Respiration
UR - http://www.scopus.com/inward/record.url?scp=84904512820&partnerID=8YFLogxK
U2 - 10.1016/j.ecoenv.2014.05.030
DO - 10.1016/j.ecoenv.2014.05.030
M3 - Artículo
SN - 0147-6513
VL - 108
SP - 72
EP - 77
JO - Ecotoxicology and Environmental Safety
JF - Ecotoxicology and Environmental Safety
ER -