第一章原核微生物的形态结构和功能.pptVIP

5.2 Result of Gram-stain The cells that retain the stain (with thick cell walls) are called Gram-positive and appear dark purple under light microscopy. The ones that lose the stain (with thin cell walls and an outer membrane) are called Gram-negative and stain pink or pale purple. G+ G- 6.reproduction and colony morphological features Reproduction Fission binary fission equal binary fission unequal binary fission trinary fission only pelodictyon(暗网菌属) multiple fission only bdellovibro（蛭弧菌） Budding budding bacteria（芽