Figure 4.

Effect of phytohormones, wounding, insect herbivory, and senescence on the lectin concentration in leaves from ground ivy plant clone EF 3. Developing leaves (located at the fifth internode) were excised from greenhouse-grown plants and treated in vitro with jasmonate methyl ester (JAME), abscisic acid, or GA₃. Wounding, herbivory, and senescence experiments were done with fully mature leaves attached to plants grown in their natural habitat. The lectin content of lectin concentration (micrograms per gram fresh weight) was determined by agglutination assays. Note that the lower lectin content of the in vitro assayed leaves is due to their early developmental stage.