Influenza virus binds to sialic acid residues

Rhinovirus binds to intercellular adhesion molecules (ICAMs)

Epstein Barr virus (EBV) binds to type 2 complement receptors on B cells

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Ligand binding depends on: 

Multiple weak, noncovalent forces

Molecular complementarity

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Four major pathogens infects plants most frequently

1. Viruses

2. Bacteria

3. Fungi

4. Insects

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Late blight disease (A), caused by the oomycete pathogen Phytophthora infestans

Black stem rust, which results from infection by the basidiomycete Puccinia graminis

Global banana (Musa spp.) production is under threat from black Sigatoka disease Mycosphaerella fijiensis.

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An effector molecule is

made by a pathogen to enhance the pathogen’s colonizing

abilities.

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Plant pathogens are divided into three groups

Biotrophs derive energy from living cells, they are found on or in living plants, can have very complex nutrient requirements and do not kill host plants rapidly;

Necrotrophs derive energy from killed cells; they invade and kill plant tissue rapidly and then live saprotrophically on the dead remains;