A functional gene can be located through the use of an expressed sequence tag (EST)

TLS Online TPP Program

#Id: 9772

#Unit 6. System Physiology – Plant

Phytoalexins are low molecular weight, lipophilic antimicrobial compounds for which phenylalanine is a substrate used by phenylalanine ammonia lyase (PAL),

TLS Online TPP Program

#Id: 9773

#Unit 6. System Physiology – Plant

In Arabidopsis, PTI induces production of indole glucosinolates, to control of fungal pathogens. 

TLS Online TPP Program

#Id: 9774

#Unit 6. System Physiology – Plant

PTI and fungal pathogen entry into epidermal tissue induces several specific cytochrome P450 enzymes, and this leads to accumulation of the indole glucosinolate 4‐methoxyindol‐3‐ylmethylglucosinolate (4M13G).

TLS Online TPP Program

#Id: 9775

#Unit 6. System Physiology – Plant

Salicylic acid (SA) is a phenolic compound and derived from the phenylpropanoid pathway that accumulates to high levels as both free and glucoside conjugates in the vicinity of incompatible infection sites.

TLS Online TPP Program

#Id: 9776

#Unit 6. System Physiology – Plant

SA accumulation leads to enhanced local ROS production.

TLS Online TPP Program

#Id: 9777

#Unit 6. System Physiology – Plant

nahG gene encodes the enzyme salicylate hydroxylase, which converts SA to catechol and thus dramatically reduces SA levels.