Chapter 13: part 2Prokaryotes and Viruses

2nd major group of Photosynthetic Bacteria

• Purple and Green Bacteria Have Unique types of Photosynthesis

• Purple or green sulfur bacteria--Carbon dioxide + Hydrogen sulfide in the presence of light forms carbohydrate + water and sulfur p247.

• Cyanobacteria- -Carbon dioxide+ water in the presence of light form carbohydrates+ water and oxygen

Spiroplasmas- motile bacteria that cause stubborn disease

Mycoplasmalike Organisms- slow weakening

Mycoplasmiclike organism devestated a grove ofCoconut palms

Bacterial effects on Plants

Halophiles- salt loving Archaea

Methane producing archae

Extreme thermophiles- archaea YNP HS rich

General life cycle of a virusTwo stages1. Replication inside host2. Spread to new host

Tobacco Mosaic Virus

Wound tumor virusTumor produced in sweet clover

Electron MicroscopeTumor virus particles

Streaked flowers of Rembrant tulipsViral infection eventually weakens plant