ISHS Acta Horticulturae 381: International Symposium on Natural Phenols in Plant Resistance
SALICYLIC ACID LEVELS IN ARABIDOPSIS THALIANA AFTER TREATMENTS WITH PSEUDOMONAS SYRINGAE OR SYNTHETIC INDUCERS |
| Authors: | K. Summermatter, Ph. Meuwly, W. Mölders, J.-P. Métraux |
| Abstract:
The appearance of pathogenesis related (PR) proteins and the levels of salicylic acid (SA) were measured after soil-drench applications of SA and 2,6-dichloroisonicotinic acid (INA) as well as after infection with Pseudomonas syringae. The earliest significant increase in SA occured 2 days post inoculation with P. syringae. After 9 days the levels reached 1.5 and 15μg/g FW for free and bound SA respectively, corresponding to respective increases of 12- and 8-fold over control plants. Treatments with INA induced an 8-fold accumulation of bound SA in the leaves. Despite different endogenous levels of SA, all treatments induced resistance against further infection and similar amounts of PR proteins. | |
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