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Abstract
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Article Information:
Effect of Light Regime on the N-ammonium Removal by the Red Algae Gracilaria vermiculophylla
A. Sánchez-Romero, A. Miranda-Baeza, J.A. López-Elías, L.R. Martínez-Córdova, Tejeda-Mansir, E. Márquez-Ríos and M.E. Rivas-Vega
Corresponding Author: A. Miranda-Baeza
Submitted: June 13, 2012
Accepted: July 09, 2012
Published: September 20, 2012 |
Abstract:
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The objective of the study was to evaluate the effect of 3 wavelengths (400-700, 455-475 and 620-630
nm) and 3 photoperiods (12:12, 16:08 and 24:00 h) on the ammonium removal and growth of Gracilaria
vermiculophylla. In a first experiment (8 h), the total ammonium nitrogen removal rate (RRTAN) ranged from
11.63±3.21 to 15.45±3.70 μmol g DW/h, while the efficiency rate of removal, ERTAN varied from 32.40±8.93 to
43.03±10.31%. In a second experiment (8 d), the Specific Growth Rate (SGR) of the macroalgae ranged from
7.24±1.35 to 13.24±1.14% /day. At the end of the trial, the N content in the tissues of G. vermiculophylla varied
from 1.49±0.14 to 2.53±0.45 g/100 g DW. The highest biomass harvested and N incorporation rate (NIR in
mg.N/L.d) corresponded to the photoperiod 16:08 at a wavelength of 620-630 nm. It is concluded that photoperiod
and light wavelength had a significant effect on SGR and N content in the tissues of the macroalgae.
Key words: Bioremediation, Gracilaria vermiculophylla, nitrogen removal, photoperiod, wavelength, ,
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Cite this Reference:
A. Sánchez-Romero, A. Miranda-Baeza, J.A. López-Elías, L.R. Martínez-Córdova, Tejeda-Mansir, E. Márquez-Ríos and M.E. Rivas-Vega, . Effect of Light Regime on the N-ammonium Removal by the Red Algae Gracilaria vermiculophylla. Current Research Journal of Biological Sciences, (5): 613-618.
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ISSN (Online): 2041-0778
ISSN (Print): 2041-076X |
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