Motility in Oscillatoria salina as affected by different factors.

Abstract

All 3-10-d-old Oscillatoria salina filaments glide with the speed of 323-330 microm/min (BG 11 medium, pH 7.5, 21 +/- 2 degrees C, continuous light intensity of approximately 30 micromol m(-2) s(-1)) in a culture chamber. However, a time bound progressive decrease in gliding speed and in percentage of gliding filaments occurred, depending upon the severity of different stress factors studied, viz. water stress (2-8% agarized media, liquid media with 0.2-1 mol/L NaCl, blot-dryness of filaments for > or = 5 min), temperature shock (5, 40 degrees C for > or = 5 min; 35 degrees C for > or = 15 min), darkness and low light intensity (2, 10 micromol m(-2) s(-1)), UV exposure (0.96-3.84 kJ/m2), pH extremes (< or = 6.5 and > or = 9.5), lack of all nutrients from liquid medium (double distilled water), presence of 'heavy' metals (1, 25 ppm Fe, Cu, Zn, Ni, Co, Hg) or organic substances in liquid medium (25, 250 ppm 2,4-D, captan, urea, DDT, thiourea). This feature of the alga (i.e. reduction in speed and percentage of gliding filaments depending upon severity of stress conditions) may thus be suggested to be used in assessing water quality.

• Authors: S Gupta, S C Agrawal
• Journal: Folia microbiologica (Folia Microbiol (Praha)) Vol. 51 Issue 6 Pg. 565-71 ( 2006) ISSN: 0015-5632 [Print] United States
• PMID: 17455793 (Publication Type: Journal Article)

Chemical References

• Anti-Bacterial Agents
• Metals, Heavy
• Organic Chemicals

Topics

• Anti-Bacterial Agents (pharmacology)
• Cyanobacteria (drug effects, physiology, radiation effects)
• Darkness
• Hot Temperature
• Hydrogen-Ion Concentration
• Light
• Metals, Heavy (pharmacology)
• Movement (drug effects, radiation effects)
• Organic Chemicals (pharmacology)
• Osmotic Pressure
• Ultraviolet Rays