Genotype and toxicity relationships among Hyalella azteca: II. Acute exposure to fluoranthene-contaminated sediment

Citation
Yh. Duan et al., Genotype and toxicity relationships among Hyalella azteca: II. Acute exposure to fluoranthene-contaminated sediment, ENV TOX CH, 19(5), 2000, pp. 1422-1426
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
ISSN journal
0730-7268 → ACNP
Volume
19
Issue
5
Year of publication
2000
Pages
1422 - 1426
Database
ISI
SICI code
0730-7268(200005)19:5<1422:GATRAH>2.0.ZU;2-E
Abstract
This study examined the genotypic responses of Hyalella azteca to the toxic ity of sediment contaminated by the polycyclic aromatic hydrocarbon (PAH) f luoranthene. We monitored the time to death fur 696 H. azteca exposed to ul traviolet light and sediment spiked with fluoranthene. The survival distrib ution functions within the genotypes at each of three variable allozyme loc i (acid phosphatase [ACP*], glucose-6-phosphate isomerase [GPI*], and phosp hoglucomutase [PGM*]) were compared using a log-rank test. Results shea-ed significant differences among SDFs at all three loci. No association of het erozygosity with time to death was observed. The homozygote ACP*-CC was ass ociated with decreased survivorship compared with ACP*-AA, ACP*-BB, and ACP *-AB. However, GPI*-AA was associated with increased survivorship compared with GPI*-BB, GPI*-CC, and GPI*-BC. Significant differences in resistance a lso were observed for PGM*-BB versus either PGM*-AC or PGM*-BC. These resul ts indicate that differential resistance to PAH phototoxicity was genetical ly related, producing significant alteration in the frequencies of several genotypes in the population.