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Title: Phototoxicity of benzo(a)pyrene in the green alga Selenastrum capricornutum

The effects of selected polycyclic aromatic hydrocarbons (PAHs) on the growth of the green alga Selenastrum capricornutum in three light regimens were examined. In gold fluorescent light, benzo(a)pyrene (BaP) at 12 mg/liter (48 ..mu..mole/liter), benz(a)anthracene (BaA) at 40 mg/liter (175 ..mu..mole/liter), anthracene (A) at 40 mg/liter (224 ..mu..mole/liter), and 13 metabolites of BaP each at 40 ..mu..g/liter had no effect on algal growth. In cool-white fluorescent light, 30% inhibition of algal growth occurred with 0.1 ..mu..mole/liter BaP, 8.0 ..mu..mole/liter BaA, and 40 ..mu..mole/liter A. BaP at 0.16 mg/liter (0.64 ..mu..mole/liter) totally inhibited growth. BaP concentrations an order of magnitude lower inhibited algal growth in fluorescent blacklight. In cool-white light, 5 of 13 metabolites of BaP (each 40 ..mu..g/liter) inhibited algal growth; 3,6-quinone; 6-hydroxy; 9-hydroxy; 3-hydroxy; and 1,6-quinone. Based on these results, PAHs and metabolites of BaP are selectively phototoxic to S. capricornutum due to the incident light intensity below 550 nm.
Authors:
; ;
Publication Date:
OSTI Identifier:
6238184
Resource Type:
Journal Article
Resource Relation:
Journal Name: Environ. Res.; (United States); Journal Volume: 35:1
Research Org:
Univ. of Cincinnati Medical Center, OH
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; ANTHRACENE; TOXICITY; BENZANTHRACENE; BENZOPYRENE; VISIBLE RADIATION; RESPONSE MODIFYING FACTORS; ALGAE; EXPERIMENTAL DATA; GROWTH; INHIBITION; METABOLITES; AROMATICS; CONDENSED AROMATICS; DATA; ELECTROMAGNETIC RADIATION; HYDROCARBONS; INFORMATION; NUMERICAL DATA; ORGANIC COMPOUNDS; PLANTS; RADIATIONS 560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)