Paper Information

Title: 

ACCLIMATION OF POTENT SOIL CYANOBACTERIUM FISCHERELLA AMBIGUA (NAGELI) GOMONT TO COMBINATION EFFECTS OF SALINITY AND CARBON DIOXIDE CONDITIONS

Type: POSTER
Author(s): SAFAEI M.*,AMIR LATIFEI F.,SHOKRAVI SH.,HOSSEINI Z.,SOLTANI N.,SAFAEI SH.,SAFAEI A.
 
 *DEPT. BIOLOGY, REACERCHING YANG CLUB ISLAMIC AZAD UNIV., GORGAN BRANCH, GORGAN, IRAN
 
Name of Seminar: IRANIAN CONGRESS OF PHYSIOLOGY AND PHARMACOLOGY
Type of Seminar:  CONGRESS
Sponsor:  PHYSIOLOGY AND PHARMACOLOGY SOCIETY, MASHHAD UNIVERSITY OF MEDICAL SCIENCE
Date:  2007Volume 18
 
 
Abstract: 

Introduction: Cyanobacterium Fischerella sp. can be considered as a completely potent strain from antibacterial production ability. In addition researches have been shown that this strain may be considered as a source of antifungal, antiviral, and cytotoxic secondary metabolites. The first antimicrobial compound have been isolated and characterized from this strain named Parsiguine. So it seems logical to characterize this strain ecophysiologically include acclimation to salt and carbon dioxide stresses.
Methods: Soil samples were collected from paddy-fields during one year. Isolation and purification were done after soil colonization in BG0-11 medium. Inoculation of Fischerella sp., was done under 2 uE.m-2.s-1 illumination, 28oC temperature, and without aeration. At the first step, wide ranges of sodium chloride salinities (0%, .5% and 1%) were treated. Growth was measured using optical density (OD750), chlorophyll and phycobiliproteins were extracted and measured using methanol.
Results: Results showed that specific growth rate, reach to maximum at 0.5% salinity, though at other salinities survival could be remained but naturally at lower levels using one direction DIC concentration system.
Conclusion: Photosynthesis measurements showed that in this strain DIC system tend to operate with bicarbonate and respiration.

 
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