Genetic authentication of Eclipta prostrate (Asteraceae) from Penthorum chinense (Penthoraceae) by Sequence Characterized Amplified Region (SCAR) markers

Introduction: For the rapid and accurate genetic identification and authentication of living organisms, improved random amplified polymorphic DNA (RAPD) fragment based development of sequence-characterized amplified region (SCAR) markers is an important genetic technique. Objective: This study aimed to develop SCAR markers for perennial herb Eclipta prostrate (E. prostrate). Methods: Here the RAPD fragments by improved RAPD amplification with primers A11 and N-7 for E. prostrate were cloned into pGEX-T vector, and PCR amplification identified the positive clones. After the enzymatic digestion, they were sequenced with Sanger sequencing. Results: Two SCAR markers were developed, which were very specific to E. prostrate, not found in Penthorum chinense Pursh(P. chinense). The nucleotide sequence search by BLAST GenBank database showed that they are novel in E. prostrate, therefore they were deposited in Genbank with accession number KX671034, KX671035. The markers did not show any identity to other species. Conclusions: Thus, in this study two specific SCAR markers were developed for genetically distinguishing and identifying the plant species E. prostrate from herb P. chinense and others.

Introducción: Verificación genética del arbusto Eclipta prostrate (Asteraceae) (Para la identificación y verificación genética rápida y precisa de organismos vivos, el uso de fragmentos de ADN polimórfico amplificado aleatoriamente (RAPD) mejorado de marcadores de región amplificada caracterizada por secuencia (SCAR) es una técnica genética importante. Objetivo: Este estudio tuvo como objetivo desarrollar marcadores SCAR para la hierba perenne Eclipta postrate (E. postrate). Métodos: En este estudio os fragmentos RAPD mediante amplificación RAPD mejorada con los cebadores A11 y N-7 para E. postrate se clonaron en el vector pGEX-T, y la amplificación por PCR identificó los clones positivos. Después de la digestión enzimática, se realizó una secuenciación Sanger. Resultados: Se desarrollaron dos marcadores SCAR, muy específicos para E. postrate, que no se encuentran en Penthorum chinense Pursh (P. chinense). La búsqueda de las secuencias de nucleótidos con BLAST en GenBank mostró que son nuevos en E. postrate, por lo que fueron depositados en Genbank con los números de acceso: KX671034 y KX671035. Los marcadores no mostraron ninguna identidad a otras especies. Conclusiones: En este estudio se desarrollaron dos marcadores SCAR específicos para distinguir e identificar genéticamente la especie de planta E. postrate de la hierba P. chinense y otras.

Research Progress in the Extraction Technology and Pharmacological Function of Active Ingredients of Eclipta Prostrate / 中国药师

Since Eclipta Prostrate used as medicine and food has notable pharmacological activity and high security, more and more attention from scholars has been paid to it in recent years. The article introduced the research progress in the extraction technology and pharmacological function of active ingredients of Eclipta Prostrate in order to provide reference for the further study and utilization of Eclipta Prostrate.