Abstract

How plants produce the important defense hormone salicylic acid (SA) has been studied for almost 50 years. The current understanding is that in land plants, SA is biosynthesized from chorismate through the isochorismate (IC) pathway and the phenylalanine ammonia-lyase (PAL) pathway (Dempsey et al, 2011). In Arabidopsis thaliana, about 90% of SA biosynthesis induced by pathogens or ultraviolet light is produced through the IC pathway and the remaining 10% is thought to be produced through the PAL pathway. This article is protected by copyright. All rights reserved.

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