Superoxide anion radical generation as a temperature stress response in the gills of freshwater catfish Heteropneustes fossilis: role in mucus exudation under elevated temperature.
Temperature induced superoxide anion radical (O2-) generation in vivo has been demonstrated in the gills of Heteropneustes fossilis by electron spin resonance (ESR) spin trapping. Temperature exposures from 25 degrees C to 37 degrees C for various times (1-4 hr) caused generation of O2- in the gill. The acid mucopolysaccharide test was conducted in gill sections during elevated temperatures. The results showed an increased activity of mucopolysaccharide in gills which indicate an increased mucus secretion in gills during elevated temperatures. The detectable stable levels of O2- in the gill at 32 and 37 degrees C temperature exposures point towards a probable role for this radical in the exudation of mucus under elevated temperature.
School of Life Sciences, Devi Ahilya University, India.
P
P
Prakash
G P
GP
Kumar
M
M
Laloraya
T
T
Hemnani
M S
MS
Parihar
D000818:Animals; D000838:Anions; D002397:Catfishes / Q000502:physiology*; D004578:Electron Spin Resonance Spectroscopy; D005260:Female; D005880:Gills / Q000378:metabolism*; D006358:Hot Temperature; D008297:Male; D009093:Mucus / Q000378:metabolism*; D013481:Superoxides / Q000378:metabolism*
D000838:Anions; D013481:Superoxides