Journal of Peanut Science

In this study, 26 different peanut germplasms were used as experimental materials, and the anthocyanin contents in different plant tissues of these germplasms were accurately measured using the pH differential method, through which the dynamic accumulation regularity of anthocyanin were systematically analyzed. The results indicated that: Genetic differences significantly impacted anthocyanin contents, and the peanuts with black-purple seed skin possessed particularly high levels of the anthocyanin contents. The distribution of anthocyanin was highly specific according to the plant tissues, among which the content in the seed skin was significantly higher than other tissues(exceeding that in roots by more than 113 fold), and so that highlighted the seed skin's role as the primary anthocyanin accumulation issue. Dynamic analysis revealed an overall upward trend in anthocyanin accumulation in the peanut seed skin during plant development, with peak accumulation occurred at seed maturation. Based on the above findings, in this study, the following application strategies are proposed as: 1) To ensure the sufficient accumulation of anthocyanin in the seed skin, the harvest period should be prolonged moderately. 2) The anthocyanin-enriched seed skin should be used as the core processing raw material to enhance the economic value of peanuts. 3) Preferentially selecting black-seed-skin peanut germplasms as parents to carry out genetic improvement of varieties with high anthocyanin content. The results of this study provide an important theoretical basis for the efficient development and utilization of peanut anthocyanin resources.