Recent studies elucidate the ancestral salicylic acid biosynthesis pathway in arabidopsis, indicating key production differences in plant species.
Salicylic acid (SA) is a vital phytohormone produced from isochorismate in arabidopsis (Arabidopsis thaliana). However, SA in most plant species is produced from phenylalanine, a pathway that has long remained unresolved. Three recent studies filled this major knowledge gap and elucidated a multistep SA biosynthesis pathway that is ancestral in the plant kingdom.
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Huang et al. (2025) studied this question.
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