Actinomycetes, Vol. 9, Part 3, 1998, pp. 37-45
Thermophilic Streptomycete flora of a meteoritic crater
S. DEY and S. R. CHAPHALKAR
Code Number:AC98006
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ABSTRACT.
The thermophilic flora from a meteoritic
crater was investigated. Five actinomycetes were selected on the
basis of their bioactivity and antibiosis. The isolates belong to
the genus Streptomyces and were identified by numerical
taxonomy as members of the species S. thermovulgaris and
S. thermoviolaceus. All isolates produce proteases, amylases
and lipases at 55C. Following induction protease and amylase (but
not lipase) production increases by 46.2% and 49.8% respectively.
The crude preparation is thermostable up to 85C with a half life
of 90 min at 85C and activity (Ca++ independent) at a
pH range of 7.5 to 12. Culture broths from all isolates show
antimicrobial activity against B. subtilis, E. coli,
M. luteus and Aspergillus
niger.
Copyright 1998 C.E.T.A., The International Centre for
Theoretical and Applied Ecology, Gorizia
