不同杨桃品种的PPO活性有很大的差异：蜜丝甜杨桃PPO对焦性没食子酸的氧化活性明显高于其他品种PPO活性，而酸杨桃PPO活性极弱。
The PPO activity towards pyrogallic acid in Misi sweet carambola was significantly higher than other varieties PPO activity , and the PPO activity in acid carambola was extremely weak .
酸杨桃