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  • Title: Effects of phenoxy acetic herbicides on growth, photosynthesis, and nitrogenase activity in cyanobacteria from rice fields.
    Author: Leganés F, Fernández-Valiente E.
    Journal: Arch Environ Contam Toxicol; 1992 Jan; 22(1):130-4. PubMed ID: 1554245.
    Abstract:
    The effects of the phenoxy acetic herbicides 2,4-dichlorophenoxy acetic acid (2,4D) and methylchlorophenoxy acetic acid (MCPA) on growth, photosynthesis, and nitrogenase activity of cyanobacteria has been investigated. Concentrations ranging from 10(-9) to 10(-3) M did not change significantly the parameters of Anabaena UAM 202. Concentrations higher than 10(-3) M of both herbicides were toxic. The primary toxic action of these herbicides in Anabaena UAM 202 was on photosynthesis.
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