**4. Identification of genes involved with drought tolerance**

Finally, transcripts encoding for cell wall proteins showed an increase in abundance, suggest‐ ing that activities as cell wall modification, pathogen recognition, and transport and secretion

When looking for molecular components of the plant innate immunity (PTI – PAMP-triggered immunity or ETI – effector-triggered immunity), [54] observed that ETI (characterized by HR) can negatively regulate PTI. Transmembrane receptor protein tyrosine kinases and MAPKKK/ MEKK transcripts were significantly downregulated in fungus-inoculated library and this data

**Figure 2.** A model of the bean innate immune system. The proposed model represents key molecular components and metabolic processes known to be involved in plant–pathogen interactions. Gene Ontology (GO) categories and En‐ zyme Codes (EC) inside boxes are differentially represented in the bean EST libraries (arrowheads pointing down rep‐ resent downregulation and arrowheads pointing up represent upregulation). Continuous arrows represent established relationship between components of the pathway and intermittent arrows represent undirected relationship. Compo‐

nents of PAMP-triggered immunity (PTI) are depicted to the right of the diagram. (Extracted from [54]).

of defense compounds are important in bean defense against anthracnose.

128 Abiotic and Biotic Stress in Plants - Recent Advances and Future Perspectives

validate by RT-qPCR.
