enaioueuaooiseO(b)aFIGURE 20.24 Spherical-shaped hyperthermopilic Archaea fromsubmarine volcanic areas: (a) Thermococcus celer.Electron micro:graph of shadowed cells (b)Dividing cellof Pyrecoceus funosusElectronmierographof thin section.Cells ofbothorganisms areabout0.8wm indiameler
Figure17.27Pyrodictiumcecultm,scanningelectronmicrograph Cells of this hyperthemophile grow optimally at105Candmaximallyat1o°Cand havebeen studtedasaFigure17.24Thermoplasmd species. (a)Thermoplasma acido.philim,an acidophilic,thermophilic mycoplasma-like armodel of macromolecular stability at high temperatures.chaean.Electronmicrographofthinsection.ThediameterotCells areenmeshed in.a.stickyglycoprotein.matrix thal bindscellsishighlyvariablefrom 02to5μm,The cell shownisabout μmindiameter.(b)Shadowedpreparation ofcellsofthemtogether.Thermoplasma coloanium isolated fromhotsprings,Cells are1-2μm indiameterNoticeabundantflagella