High calcium content in Streptomyces spores and its release as an early event during spore germination.

Journal of Bacteriology
J A SalasC Hardisson

Abstract

The metal ion content of spores of five Streptomyces species was studied. A general feature of this study was the finding of a very high calcium content (1.1 to 2.1% of the dry weight). Accumulation of calcium occurred preferentially during the sporulation process. Spore calcium was located in the integument fraction, and more than 95% of the calcium was removed from intact spores by ethylene glycol-bis(beta-aminoethyl ether)-N,N-tetraacetic acid. Several divalent cations (Mg2+, Mn2+, Zn2+, and Fe2+) which induced darkening of spores and loss of heat resistance also caused the release of calcium from spores. In addition, darkening of spores was blocked by metabolic inhibitors, whereas calcium excretion was not affected. Two different categories of events in the initiation of germination may be differentiated; first, calcium release from spores which is not energy dependent and is a consequence of triggering of germination by some divalent cations, and second, some other events including loss of heat resistance, loss of spore refractility, and a decrease in absorbance, with at least one energy-dependent step.

References

Apr 1, 1978·Journal of General Microbiology·C HardissonJ E Suárez
Jun 1, 1978·Journal of Bacteriology·C F Hirsch, J C Ensign
Sep 1, 1976·Journal of Bacteriology·T J Beveridge, R G Murray
Mar 1, 1974·Journal of Bacteriology·H ScribnerS Silver
Jul 1, 1980·Journal of Bacteriology·D Eaton, J C Ensign
May 1, 1980·Archives of Microbiology·I B NaumovaA P Bezzubenkova

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Citations

Sep 3, 1987·Nature·D G SwanP F Leadlay
Mar 19, 2013·FEMS Microbiology Letters·Paula YagüeAngel Manteca
Nov 29, 2017·Frontiers in Microbiology·Jan BobekMatouš Čihák
Mar 1, 1990·Applied and Environmental Microbiology·A S Abbas, C Edwards
Mar 1, 1986·Journal of Bacteriology·L M QuirósJ A Salas

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