Paper Information

Title: 

ECOPHYSIOLOGICAL CHARACTERIZATION OF PHARMACEUTICALLY POTENT CYANOBACTERIUMNOSTOC SP. COLLECTED FROM PADDY-FIELDS OF GOLESTAN PROVINCE

Type: POSTER
Author(s): AMIRLATIFI F.*,SAFAEI M.,HOSSEINI KOLBADI Z.,SHOKRAVI SH.
 
 *DEPT. BIOLOGY AND REACERCHING, YANG CLUB, ISLAMIC AZAD UNIV., GORGAN BRANCH
 
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: Nostocalean cyanobacteria seems potent microbial strains from pharmaceutical point of view. Secondary metabolites with antiviral, antifungal and immunologic have been distinguished in the family nostocaceae. So biological characterization including physiological and ecophysiological seems basic for each economic large scale purposes at the future.
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 Nostoc sp. was done under 2 uE.m-2.s-1 white fluorescent illumination, 28oC temperature and pH 7.2. Different acidities (pHs 5, 7, 9)were studied under limited carbon dioxide condition.
Results: Results showed that in all treatments, organism tends to enter logarithmic phase of growth until third day. Highest specific growth rate belong to alkaline condition(pH 9). This Results showed that after one week, under un buffered condition of the cultures, pH of different treatments tend to a limited but constant range (pHs 8-8.15). The amount of ammonium liberation was significantly more in acidic condition especially at the second day after inoculation.
Conclusion: However, this strains show potentiality being as a candidate as antibacterial production. This strain can survive in different acidities and show outstanding growth at the first days especially in alkaline condition. Pigment composition can be rearranged at different acidities and phycobilisome systems cause viability and growth under acidity fluctuations and limited irradiance in addition of low carbon dioxide concentration.

 
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