Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   IRANIAN JOURNAL OF BIOLOGY   FALL 2007 , Volume 20 , Number 3; Page(s) 242 To 252.
 
Paper: 

NEW RECORDS ON MORPHOLOGICAL VARIATION OF NOSTOC MUSCORUM AND NOSTOC ELLIPSOSPORUM ON BENECKS, AND MODIFIED ALLEN'S, MEDIA DURING THEIR LIFE CYCLE

 
 
Author(s):  NOUROUZI BAHAREH*, AHMADI MOGHADAM A.
 
* DEPT. OF BIOLOGY, FACULTY OF SCIENCES, SHAHID BAHONAR UNIVERSITY, KERMAN, I.R. OF IRAN
 
Abstract: 

As the morphological traits of cyanobacteria changes in different culture media, their taxonomical position has been argued in recent years. To determine a reliable taxonomic system concerning the culture media the main target is to have the highest rate of morphological stability in the medium where dimensions of filaments, trichomes, vegetative cells, heterocysts and spores have a normal frequency. Nostoc ellipsosporum and Nostoc muscorum which are the most frequent species of paddy fields in Golestan province were cultured on Allen’s and Benecks culture media. Morphological variations of length and width of heterocysts, akinetes and vegetative cells were measured from day first up to the end of the experiment (21 days) meeting the static phase of growth. Observations showed that vegetative cells of both species became reformatted on Benecks medium being spiral up to the end of experiment. Heterocystous also had a bony form while in Allen's medium the species had their natural form. The results of the statistical analysis of data obtained from factorial experiment in a completely randomized design and from Duncan test together with dendrograms showed significant differences in most measured characteristics at 95% level. Hence Allen medium is suggested to be used when less morphological variation and a normal distribution of the characteristics is expected. According to the results new taxonomic keys also were designed.

 
Keyword(s): MORPHOLOGICAL VARIATION, NOSTOC MUSCORUM, NOSTOC ELLIPSOSPORUM, BENECKS, MODIFIED ALLEN'S, LIFE CYCLE
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 67
 
Latest on Blog
Enter SID Blog