Figure 2

Representative overview of DEG involved in biotic stress response in Gossypium hirsutum 48 h after infection with cotton boll weevil larvae. Log2-fold change of gene expression (cotton boll weevil compared to mock-inoculated control) was analysed by MapMan software. Yellow squares represent up-regulated genes and blue squares represent down-regulated genes. The colour saturation indicates log fold change > 4 and < 4. The figure shows that the molecular recognition of pathogens and herbivores by plants to trigger a defence response requires initial recognition including the following: 1. Microbe-, pathogen- and damage-associated molecular patterns (MAMP, PAMP and DAMP) are recognised by pattern recognition receptors (PRR) and lead to PAMP-triggered immunity (PTI). 2. Oviposition-associated compounds are recognised by unknown receptors and trigger defensive responses. 3. Putative herbivore-associated molecular patterns (HAMP) are recognised by receptors and lead to herbivore-triggered immunity (HTI). 4. Wounding by herbivores leads to the release of DAMP and to wound-induced resistance (WIR).