A STUDY ON POLYPHENOL OXIDASE ACTIVITY DURING SEED-GERMINATION

In this work, polphenol oxidase (PPO) activities, when used four diffe rent substrates (dopa, catechol, caffeic acid, tyrosine) oxidizing act ivities, during seed germination of six different plants were studied in the embryos and food tissues of the seeds depending on time. It was found that during germination, PPO activities of seeds, did not show similar fate but the activities in embryos were higher than in food re serve tissues. Dopa-oxidizing enzyme had the highest activity in gener al. Relation between seed germination and PPO activity was discussed i n point of respiration.