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Interconversion of the salicylic acid signal and its glucoside in tobacco
Author(s) -
Hennig Jacek,
Malamy Jocelyn,
Grynkiewicz Grzegorz,
Indulski Janusz,
Klessig Daniel F.
Publication year - 1993
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1046/j.1365-313x.1993.04040593.x
Subject(s) - salicylic acid , pathogenesis , extracellular , chemistry , pharmacology , microbiology and biotechnology , biology , biochemistry , immunology
Salicylic acid (SA) has been proposed to play a role in the induction of pathogenesis‐related (PR) proteins and systemic acquired resistance (SAR) in tobacco. Since SA is rapidly converted to salicylic acid β‐glucoside (SAG) in tobacco, we have attempted to assess the role of SAG in pathogenesis by application of chemically synthesized SAG to tobacco leaves. SAG was as active as SA in induction of PR‐1 gene expression. This induction was preceded by a transient release of SA, which occurred in the extracellular spaces. The existence of a mechanism that releases SA from SAG suggests a possible role for SAG in SAR.