Affiliation:
1. Department of Microbiology, University of Texas, Austin, Texas
Abstract
Socolofsky
, M. D. (University of Texas, Austin) and
Orville Wyss
. Resistance of the
Azotobacter
cyst. J. Bacteriol.
84:
119–124. 1962—The
Azotobacter
cysts were found to be more resistant than the vegetative cells to various harmful agents. Studies involving ultraviolet irradiation indicated that cysts required twice as great a dosage, as correspondingly treated vegetative cells, to be 90% inactivated. The acquisition of ultraviolet resistance during the encystment process was gradual and appeared to be related to the formation of exine and intine. A slow loss of ultraviolet resistance during germination was also noted. The cysts exhibited no marked resistance to heat, although they were extremely resistant to gamma radiation, sonic treatment, and desiccation. Evidence was presented indicating that the cyst is not a bacterial endospore. The encystment process may confer a survival advantage upon the organism by coupling the low endogenous respiration rate with the ability to withstand desiccation.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
Reference10 articles.
1. BISSET K. A. 1952. Bacteria. E. and S. Livingstone Ltd. Edinburgh.
2. Evidence from the cytology of Azotobacter chroococcum of a relationship with Rhizobium and the Bacillaceae;BISSET K. A.;J. Gen. Microbiol.,1955
3. The decomposition of cellulose by aerobic bacteria;DUB;J. Bacteriol.,1928
4. FOSTER J. W. 1957. In H. 0. Halvorson [ed.] Spores p. 76-82. American Institute of Biological Sciences Washington D.C.
5. HALVORSON H. AND C. HowiTT. 1961. The role of DPA in bacterial spores. In H. 0. Halvorson [ed.] Spores II. Burgess Publishing Co. Minneapolis.
Cited by
72 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献