Polyphenol oxidase (PPO), often encoded by a multi-gene family, causes oxidative browning, a significant problem in many food products. Low-browning potatoes were produced previously through suppression of PPO gene expression, but the contribution of individual PPO gene isoform to the oxidative browning process was unknown. | Reduced polyphenol oxidase gene expression and enzymatic browning in potato Solanum tuberosum L. with artificial microRNAs