Fig. 7
From: Cold stress in the harvest period: effects on tobacco leaf quality and curing characteristics
Antioxidant enzyme system and polyphenol oxidase activity inside and outside the greenhouse in flue-cured tobacco during bulk curing. Different capital letters indicate that there were significant differences among different treatments at the same sampling temperature point. Different lowercase letters indicate that there were significant differences among different sampling temperature at the same treatments (P < 0.05). The values were the mean of three biological replicates