PHYA is the only gene that encodes a Type I phytochrome. Phytochrome A predominantly perceives far-red light.

TLS Online TPP Program

#Id: 9771

#Unit 6. System Physiology – Plant

Polygalacturonases (PG) secreted by the fungal hyphae interact with WAK1 on plant cell wall results in the expression of plant defense proteins, including PGIPs Chitinases, glucanases, and phytoalexins to damage the fungal hyphae

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.