ISHS Acta Horticulturae 381: International Symposium on Natural Phenols in Plant Resistance
SALICYLIC ACID CONTENT IN CUCUMBER PLANTS INFECTED WITH PSEUDOMONAS LACHRYMANS AND TOBACCO NECROSIS VIRUS |
| Authors: | W. Mölders, P. Meuwly, K. Summermatter, J.-P. Métraux |
| Abstract:
Cucumber plants were inoculated either with Pseudomonas lachrymans or with tobacco necrosis virus (TNV) on the lower leaf (leaf 1). Levels of salicylic acid (SA) were analysed in leaf 1 and in the upper leaf (leaf 2) at regular intervals up to 7 days post-infection. The level of free SA in leaf 1 24h after infection with P. lachrymans was to 940 ng/g FW, representing a 21-fold increase compared to controls. In leaf 2 free SA increased 5-fold (to 320 ng/g FW) 48 h post-inoculation. Inoculation with TNV gave a lower and delayed increase of SA compared to infection with P. lachrymans. | |
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