TBT toxicity on the marine microalga Nannochloropsis oculata.
Commercial antifouling formulations containing TBT are the major source of organotin contamination in coastal waters. In view of the persisting TBT residues (13 ng Sn l(-1)) in the coastal waters of South Korea, an attempt has been made to evaluate the growth response and biochemical composition of laboratory-cultured Nannochloropsis oculata to TBT toxicity. It is evident that the persisting concentration level of TBT is high enough to cause adverse effect on the microalgal species. The EC50 (24 h) was found to be at 0.89 nM level of TBT for this marine eustigmatophyte N. oculata. Photosynthetic pigment content was significantly affected. At elevated TBT concentrations of 1.0 nM, especially pronounced changes in biochemical composition was found. TBT tolerance of N. oculata and its growth as well as biochemical responses are discussed.
Sidharthan
M
M
Department of Marine Biotechnology, Soonchunhyang University, Shinchang Myen, Asan City, Republic of Korea.
Young
Kim Shin
KS
Woul
Lee Hoe
LH
Soon
Park Kwan
PK
Shin
Hyun Woung
HW
D056890:Eukaryota / Q000254:growth & development / Q000502:physiology; D007928:Lethal Dose 50; D010788:Photosynthesis / Q000187:drug effects; D014220:Trialkyltin Compounds / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
D014220:Trialkyltin Compounds; D014874:Water Pollutants, Chemical; C011559:tributyltin