Figure 1.

PG activity accumulates in conjunction with germination. A, The activity of PG from desiccated developing and mature seeds and mature seeds during germination and subsequent radicle protrusion as assessed using a reducing sugar assay in the presence of 5 mm CaCl₂. From 48 h onward seeds were separated into those that had and had not completed germination. IG, Immature green; MG, mature green; B, breaker; M, mature. B, The effect of 5 mm CaCl₂ on the activity of PG from whole cv Moneymaker seeds allowed to imbibe for 48 h from which the radicle had protruded. Activity is reported as picomoles of GalUA produced per hour per seed.