Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/17399
Title: A novel strategy of oxygen restriction by some diazotrophic enteric bacteria
Authors: Kannan, V
Raju, P N
Issue Date: Sep-2002
Publisher: NISCAIR-CSIR, India
Abstract: Protection of nitrogenase against oxygen inactivation in diazotrophs involves numerous strategies. Glutathione is known to play an important role in scavenging oxyradicals in many living systems. The involvement of glutathione (reduced) (GSH), glutathione peroxidase (GPX) and glutathione reductase (GR) in the protection of nitrogenase in free living diazotrophs is reported here for the first time. Reduced glutathione content and the activity of glutathione peroxidase and glutathione reductase increased with increase in oxygen concentration under nitrogen fixing conditions but decreased under anaerobic and nitrogenase repressed conditions. This correlation is used to postulate a protecting role for GSH-GPX-GR system against oxygen inactivation of nitrogenase.
Page(s): 1043-1049
URI: http://hdl.handle.net/123456789/17399
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.40(09) [September 2002]

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