The increase in phenylalanine ammonia-lyase activity in strawberry leaf disks and its correlation with flavonoid synthesis

Changes in L-Phenylalanine Ammonia-lyase Activity and Anthocyanin Synthesis during Berry Ripening of Three Grape Cultivars

“…Furthermore, they postulated that sugar flux to berries, especially to skin tissue, is one of the main factors which govern the rate of phenol accumulation (17). In fact, in culturing leaf disks of strawberry or skin disks of grape berry in vitro, addition of sugars to the medium induced PAL activity or anthocyanin synthesis (4,5,16) .…”

Induction of Phenylalanine Ammonia-lyase in Xanthium Leaf Disks. Photosynthetic Requirement and Effect of Daylength

“…Stimulating effects of light on phenolic biosynthesis in several tissues have now been ascribed to a lightinduced synthesis of the ammonia-lyase (1,7,8,22,27,36). Stimulation of lyase synthesis by exogenous carbohydrate (4) and temperature effects on lyase synthesis ( 11 ) have been cited as the mechanism whereby these factors influence phenolic production.…”

Gibberellic Acid-Promoted Lignification and Phenylalanine Ammonia-lyase Activity in a Dwarf Pea (Pisum sativum)

“…However, with the exception of phenylalanine ammonia-lyase (E.C. 4.3.1.5), which has been extensively purified (7) and studied (2,4,8,18,19,22,26,31,32), and is implicated as one controlling agent in lignification (10,29,30), there is relatively little information regarding most of the enzymatic reactions involved (3,23,24). Consequently, the factors which control lignification are poorly understood but appear to vary with environmental conditions (21), developmental stage (11,23,25) and the species of the plant (23,24).…”