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<p><i>Ulva prolifera</i> and <i>Capsosiphon fulvescens</i>, popular seaweed foods in Korea, get frequently mixed in commercial food products because of their overlapping growing locations, seasons, and morphological characteristics. In this study, molecular markers were developed to distinguish these species using a real-time PCR. Six primer pairs were designed for chloroplast genes <i>cemA</i>, <i>psbB</i>, and <i>rbcL</i>. R<sup>2</sup> values of all primer pairs were &gt; 0.99, and slopes ranged between − 3.14 and − 3.45, and the efficiency was 94.89–108.39%. Blind test results for 20 samples to verify the applicability of the developed primer pairs perfectly match the blind mixture data. Of the 14 tested commercial products, four <i>C. fulvescens</i> products had mixing of a small quantity of <i>U. prolifera</i> species. The developed real-time quantitative PCR assay may aid in the quality control of commercial products of both species as well as the protection of consumer rights.</p>

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Chloroplast DNA markers for distinguishing seaweeds Ulva prolifera and Capsosiphon fulvescens using real-time quantitative PCR and their application in commercial products

  • 期刊论文

  • 发表日期：

    2025年1月19日

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  • Ui Cheol Park,
  • Sung Je Choi,
  • Ju Hee Kim,
  • Cheol Seong Jang

摘要

Ulva prolifera and Capsosiphon fulvescens, popular seaweed foods in Korea, get frequently mixed in commercial food products because of their overlapping growing locations, seasons, and morphological characteristics. In this study, molecular markers were developed to distinguish these species using a real-time PCR. Six primer pairs were designed for chloroplast genes cemA, psbB, and rbcL. R2 values of all primer pairs were > 0.99, and slopes ranged between − 3.14 and − 3.45, and the efficiency was 94.89–108.39%. Blind test results for 20 samples to verify the applicability of the developed primer pairs perfectly match the blind mixture data. Of the 14 tested commercial products, four C. fulvescens products had mixing of a small quantity of U. prolifera species. The developed real-time quantitative PCR assay may aid in the quality control of commercial products of both species as well as the protection of consumer rights.