Asian Journal of Biochemistry1815-99231815-9931Academic Journals Inc.10.3923/ajb.2008.162.168Anabaena torulosa]]>ShingWong Ling SurifSalmijah HengLee Yook 3200833A biosensor based on electrochemical transduction using an oxygen probe
has been developed for the measurement of Cd2+ toxicity by
using cyanobacteria (Anabaena torulosa), where the cells were immobilized
on the surface of an oxygen probe. The biosensor responded to the changes
in photosynthetic oxygen release under illumination by a light source.
Exposure to Cd2+ at concentrations below approximately 8 mg
L-1 did not demonstrate any inhibition but stimulation of oxygen
production was observed. Inhibition occurred only when concentration of
Cd2+ was above 8 mg L-1. Using the same concentration
range of Cd2+ but increasing the exposure time of Cd2+
from 15 to 30 min, inhibition of oxygen release was mainly observed.
This pattern of inhibition of A. torulosa by Cd2+ was
different from that of Cu2+, which was also measured by the
same toxicity biosensor, where no stimulation in oxygen release was observed.
The use of toxicity biosensor has enabled the detail toxicity behaviour
of A. torulosa towards Cd2+ to be evaluated.]]>Atal, N., P.P. Saradhi and P. Mohanty,199132943951Bentley, A., A, Atkinson, J. Jezek and D.M. Rawson,200115469475Carpentier, R., C. Loranger, J. Chartrand and M. Purcell,19912495560Chay, T.C., S. Salmijah and L.Y. Heng,2005Anabaena torulosa.]]>34954Clemens, S., M.G. Palmgren and U. Kramer,20027309315Clijsters, H. and F. van Assche,198573140Desikachary, M.,19591959Evans, G.P., M.G. Briers and D.M. Rawson,19862287300Heng, L.Y., K. Jusoh, C.H.M. Ling and M. Idris,2004Anabaena flos-aquae.]]>12373379Giardi, M.T., M. Kobilzek and J. Masojidek,20011610271033James, D.E.,19791979Krishnan, A.A., P.K. Krishnakumar and M. Rajagopalan,2007Trichodesmium erythraeum (Ehrenberg) bloom along the southwest coast of India (Arabic Sea) and its impact on trace metal concentration in seawater.]]>71641646Krupa, Z.,199954723729Linda, E.G.,20002000Lockwood, M.P.,19761976Mattiasson, B.,1997148533533Nagel, K. and J. Voigt,1995Chlamydomonas mutant strain.]]>150105110Nies, D.H.,199951730750Pagliano, C., M. Raviolo, F.D. Vecchia, R. Gabbrielli, C. Gonnelli, N. Rascio, R. Barbato and N.L. Rocca,2006Oryza sativa L.).]]>847078Philp, J.C., S. Balmand, E. Hajto, M.J. Bailey, S. Wiles, A.K. Lilley, J. Hajto and S.A. Dunbar,20034876174Prasad, M.N.V. and K. Strzalka,19991999Roger, K.R.,199510533541Siedlecka, A. and Z. Krupa,1996Phaseolus vulgaris.]]>32833841Stratton, G.W. and C.T. Corke,1979Anabaena inaequalis.]]>5277282Trevan, M.D. and L. Mak,198866873Van der Heever, J.A. and J.U. Grobbelaar,1998In vivo chlorophyll a fluorescence of Selenastrum capricornutum as a screening bioassay in toxicity studies.]]>35281286