Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2057710 | Journal of Plant Physiology | 2006 | 7 Pages |
SummaryIncreased amounts of salicylic acid (SA) were detected in the roots and hypocotyl of cucumber plants (Cucumis sativus) using high-performance liquid chromatography following inoculation of the leaves with the anthracnose pathogen, Colletotrichum lagenarium. The concentrations of SA in the internodes immediately below the infected leaves increased to more than 1 μg/g fresh weight. In contrast, the concentrations of SA in stems distant from, or above the infected leaves increased to 100–300 ng/g. An increase in SA levels was observed in the upper stem 2 d after inoculation, followed by the hypocotyl with an increase detected 4 d after inoculation. An initial increase in the SA levels was detected in the stem, followed by an increase in SA levels in the root from a basal level of approximately 300 ng/g to more than 1 μg/g. The increased level of SA in the lower leaves was less than 100 ng/g. These results indicate that the levels of SA in the hypocotyl and root increased significantly following inoculation of the leaves with a microorganism capable of inducing SAR.