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Atrazine tolerance of algae isolated from two agricultural streams
Author(s) -
Hersh Charles M.,
Crumpton William G.
Publication year - 1989
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620080409
Subject(s) - algae , atrazine , biology , botany , chlorella , green algae , photosynthesis , chlorella vulgaris , environmental chemistry , ecology , chemistry , pesticide
Based on photosynthesis (oxygen evolution) EC50s determined from short (5 min) assays, green algae ( Chlorella sp. and other species of Chlorococcales) isolated at random from an atrazine‒contaminated stream (Big Spring) in midsummer exhibited similar tolerances to atrazine (range of EC50s: 42–125 μg/L) compared to algae isolated at random from a noncontaminated stream (Osage Spring) (range of EC50s: 35–162 μg/L). A laboratory strain of Chlamydomonas reinhardii known to be susceptible to atrazine responded similarly (EC50: 45 μg/L). The EC50s of these algae are similar to those previously reported for laboratory strains. In contrast, an alga ( Franceia sp., Chlorococcales) isolated at random during late spring from Big Spring responded similarly to a laboratory strain of Chlamydomonas reinhardii that is resistant to atrazine ( Franceia sp. EC50s: 430–774 μg/L, C. reinhardii EC50: 466 μg/L). The EC50 values of these algae are near the high end of the range of EC50s reported for green algae.