Effect of insecticides and phenolics on nitrogen fixation by Nostoc linckia

Journal Article · Mon Aug 01 04:00:00 EDT 1988 · Bull. Environ. Contam. Toxicol.; (United States)

DOI:https://doi.org/10.1007/BF01705442· OSTI ID:6655635

Megharaj, M; Venkateswarlu, K; Rao, A S

The nitrogen-fixing blue-green algae (cyanobacteria) significantly influence the nitrogen economy of temperate and tropical soils. Although the genera Nostoc and Tolypothrix have been particularly implicated in the fixation of significantly large amounts of atmospheric nitrogen, these diazotrophs received little attention in relation to insecticide treatment and the available few reports do not indicate a permanent deleterious effect of insecticides on their nitrogenase activity. As it has been well established that the effect of insecticides on nitrogen fixation by cyanobacteria is independent of that on growth, an attempt was, therefore, made to determine the influence of four insecticides (monocrotophos, quinalphos, cypermethrin and fenvalerate) and four phenolics (p-nitrophenol (PNP), m-nitrophenol (MNP), 2,4-dinitrophenol (DNP) and catechol) on nitrogen-fixing capacity of N.linckia, isolated from a black soil.

• Research Organization: Nagarjuna Univ., Pradesh (India)
• OSTI ID: 6655635
• Journal Information: Bull. Environ. Contam. Toxicol.; (United States), Journal Name: Bull. Environ. Contam. Toxicol.; (United States) Vol. 41:2; ISSN BECTA
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AROMATICS
BIOLOGICAL EFFECTS
CYANOBACTERIA
HYDROXY COMPOUNDS
INSECTICIDES
MICROORGANISMS
NITROGEN FIXATION
ORGANIC COMPOUNDS
PESTICIDES
PHENOLS
SOILS