34. Stewart, J. R. and R. M. Brown, Jr.
1971. Algicidal nonfruiting myxobacteria with high G+C ratios.
Archiv. f. Mikrobiol. 80:176-190.
34. Summary
The deoxyribonucleic acids of five algicidal
nonfruiting myxobacteria are reported to have base ratios ranging
from 69-71 G+C mole % as determined by thermal denaturation temperatures;
no unusual nucleic acid bases were detected. These organisms
are described as amicrocystogenous, gliding, Gram-negative bacilli
capable of degrading gelatin, casein, starch, cellulose, chitin,
and alginate. All have been shown previously to be algicidal.
Poly--hydroxybutyrate in each was indicated by its conversion
to crotonic acid. Antibiotic sensitivity of the five was similar
to that of known nonfruiting myxobacteria. The fine structure
of one, Myxobacter 44, revealed a triple-layered cellular envelope,
the middle later of which is lysozyme sensitive. Ruthenium red-positive
slime material adhered to the outer surface.