18.3 Mollicutes:The Mycoplasmas 柔膜菌门：支原体 Key genera:Mycoplasma,Spiroplasma -Lack cell walls无胞壁 Some of the smallest organisms capable of autonomous growth最小的可独立生活的生物 Parasites that inhabit animal and plant hosts Key components of peptidoglycan are missing Mycoplasma cells are pleomorphic多形性 Cells may be cocci or filaments of various lengths 球状或不同长度的丝状 CHEN FENG,MICROBIOLOGY,SJTU
Chen Feng, Microbiology, SJTU 18.3 Mollicutes: The Mycoplasmas 柔膜菌门：支原体 • Key genera: Mycoplasma, Spiroplasma – Lack cell walls无胞壁 – Some of the smallest organisms capable of autonomous growth最小的可独立生活的生物 – Parasites that inhabit animal and plant hosts – Key components of peptidoglycan are missing • Mycoplasma cells are pleomorphic多形性 – Cells may be cocci or filaments of various lengths 球状或不同长度的丝状
18.3 Mollicutes:The Mycoplasmas Growth of mycoplasmas - Media for the culture of mycoplasmas are typically quite complex营养需求复杂 Mycoplasma colonies show a characteristic "fried- egg"appearance 2012 Pearson Education.Inc
Chen Feng, Microbiology, SJTU – Media for the culture of mycoplasmas are typically quite complex 营养需求复杂 – Mycoplasma colonies show a characteristic “friedegg” appearance Growth of mycoplasmas 18.3 Mollicutes: The Mycoplasmas
18.3 Mollicutes:The Mycoplasmas Spiroplasma螺原体属 Helical or spiral-shaped wall-less cells Rotary screw motility Isolated from ticks,hemolymph and gut of insects,vascular plant fluids,and insects that feed on the fluids uoswe!ll!M'pInea 2012 Pearson Education,Inc
Chen Feng, Microbiology, SJTU • Spiroplasma 螺原体属 – Helical or spiral-shaped wall-less cells – Rotary screw motility – Isolated from ticks, hemolymph and gut of insects, vascular plant fluids, and insects that feed on the fluids 18.3 Mollicutes: The Mycoplasmas
18.4 Actinobacteria:Coryneform Propionic Acid Bacteria放线菌：棒 杆菌与丙酸菌 Key genera:Corynebacterium,Arthrobacter, Propionibacterium棒状杆菌属，节杆菌属，丙酸杆 菌属 -Actinobacteria form their own phylum放线菌门 -Over 30 taxonomic families Rod-shaped to filamentous,usually aerobic - Mostly harmless commensals (ycobacterium are exceptions分支杆菌属) Valuable for antibiotics and certain fermented dairy products CHEN FENG,MICROBIOLOGY,SJTU
Chen Feng, Microbiology, SJTU 18.4 Actinobacteria: Coryneform & Propionic Acid Bacteria 放线菌：棒 杆菌与丙酸菌 • Key genera: Corynebacterium, Arthrobacter, Propionibacterium 棒状杆菌属，节杆菌属，丙酸杆 菌属 – Actinobacteria form their own phylum放线菌门 – Over 30 taxonomic families – Rod-shaped to filamentous, usually aerobic – Mostly harmless commensals (Mycobacterium are exceptions分支杆菌属) – Valuable for antibiotics and certain fermented dairy products
18.4 Actinobacteria:Coryneform Propionic Acid Bacteria Corynebacterium棒杆菌属 Gram-positive,aerobic,nonmotile,rod-shaped革兰氏 阳性、好氧、不运动、杆菌 Form club-shaped,irregular-shaped,or V-shaped cell arrangements呈棒状、V形或不规则状 Extremely diverse ·Arthrobacter节杆菌属 Primarily soil organisms Remarkably resistant to desiccation and starvation 2012 Pearson Education,Inc
Chen Feng, Microbiology, SJTU • Corynebacterium 棒杆菌属 – Gram-positive, aerobic, nonmotile, rod-shaped革兰氏 阳性、好氧、不运动、杆菌 – Form club-shaped, irregular-shaped, or V-shaped cell arrangements呈棒状、V形或不规则状 – Extremely diverse • Arthrobacter 节杆菌属 – Primarily soil organisms – Remarkably resistant to desiccation and starvation 18.4 Actinobacteria: Coryneform & Propionic Acid Bacteria