Studies on the leaves of the family salicaceae—xi

Leaf age heterogeneity among selected Populus clones: 1 Influences on feeding and oviposition preferences of adult Chrysomela scripta F (Coleoptera: Chrysomelidae): 2 Correlations of preferences with foliar phenolic glycoside profiles

“…Within the Salicaceae, phenolic glycosides are common phenolic compounds and have been studied extensively by many researchers in Europe and North America (i.e. Pearl & Darling 1968, Lindroth & Pajutee 1987. The phenolic glycosides consist of a sugar moiety bonded to the aglycone at the phenolic hydroxyl group (Harborne 1964).…”

“…Foliar levels peak in early summer and decrease throughout the growing season until leaf fall. In some poplar species, the salicin levels are lower in September leaves than in May leaves (Pearl & Darling 1968). The phenolic glycoside profile of bigtooth aspen also exhibits a seasonal pattern ).…”