Figure 1.

6-MeSA Induces PR Protein Accumulation in Tobacco.

The uppermost fully expanded leaves of 8-week-old NN genotype tobacco plants were left untreated (control) or infiltrated with buffer in the presence or absence of 2.5 mM 6-MeSA or SA. Seven days later, the treated and control leaves were sampled. Antiserum raised against tobacco PR1, glucanase, or chitinase was used for immunoblots prepared from the leaf samples.