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44965893014.Pdf Revista de Biología Tropical ISSN: 0034-7744 ISSN: 2215-2075 Universidad de Costa Rica Mei, Zhiqiang; Khan, Md. Asaduzzaman; Fu, Junjiang Genetic authentication of Eclipta prostrate (Asteraceae) from Penthorum chinense (Penthoraceae) by Sequence Characterized Amplified Region (SCAR) markers Revista de Biología Tropical, vol. 68, no. 1, 2020, January-March, pp. 180-188 Universidad de Costa Rica DOI: 10.15517/RBT.V68I1.37046 Available in: http://www.redalyc.org/articulo.oa?id=44965893014 How to cite Complete issue Scientific Information System Redalyc More information about this article Network of Scientific Journals from Latin America and the Caribbean, Spain and Journal's webpage in redalyc.org Portugal Project academic non-profit, developed under the open access initiative Genetic authentication of Eclipta prostrate (Asteraceae) from Penthorum chinense (Penthoraceae) by Sequence Characterized Amplified Region (SCAR) markers Zhiqiang Mei1, Md. Asaduzzaman Khan1 & Junjiang Fu2* 1. The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan 646000, China; [email protected], [email protected] 2. Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Zhongshan Road, Luzhou, Sichuan 646000, China; [email protected], [email protected] * Correspondance Received 28-IV-2019. Corrected 14-XI-2019. Accepted 20-I-2020. ABSTRACT. 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 frag- ments 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. Key words: Eclipta prostrate; genetic authentication; Penthorum chinense Pursh; random amplified polymor- phic DNA; sequence characterized amplified region. Mei, Z., Khan, M.A., & Fu, J. (2020). Genetic authentication of Eclipta prostrate (Asteraceae) from Penthorum chinense (Penthoraceae) by Sequence Characterized Amplified Region (SCAR) markers. Revista de Biología Tropical, 68(1), 180-188. The traditional Chinese medicinal (TCM) a natural compound α-terthienylmethanol from plant Eclipta prostrate, commonly known as E. prostrate can induce apoptosis in human False Daisy (lǐ cháng in Chinese), is widely endometrial cancer cells by ROS production distributed throughout India, Nepal, China, via NADPH oxidase (Lee et al., 2015). Recent- Thailand, and Brazil. In Oriental regions, E. ly, another natural compound Wedelolactone, prostrate has medicinal usage, mainly as pur- isolated from E. prostrate, exhibited preven- gative, and external usage for skin diseases. tion of vascular remodeling and neointimal Moreover, the decoction of E. prostrate leaves is hyperplasia by VSMC proliferation through used for normal hair-growth of new born babies Akt inhibition and AMPK activation (Peng et in India. Research studies showed that extracts al., 2017). The recent interests of medicinal from E. prostrate can protect normal human chemists in this plant have influence on the bronchial epithelial (NHBE) cells from ciga- identification system of this plant species, and rette smoke extracts (CSE) (Ding et al., 2014); their genetic authentication from other highly 180 Rev. Biol. Trop. (Int. J. Trop. Biol. ISSN-0034-7744) Vol. 68(1): 180-188, March 2020 morphological similar substitutes, such as Pen- STR (short tandem repeat) etc. (Williams, thorum chinense Pursh (P. chinense) with dif- Kubelik, Livak, Rafalski, & Tingey, 1990; Fu, ferent medicinal properties and activities. Yang, Khan, & Mei, 2013; Khan, Cheng, Mei, P. chinense, also known as ‘Gan huang Wei, & Fu, 2016; Mei, Zhang, Liu, Imani, cao’, is a perennial herb with a rich history & Fu, 2017c; Fu et al., 2018). A combina- of medicinal use in different parts of China, tion of RAPD and SCAR marker analysis or especially among Miao ethnic group (Mei et SCAR marker alone provides a high level of al., 2017a; Mei, Khan, Zhang, & Fu, 2017b). P. authenticity of genetic identification (Fu et al., chinense is mainly found in East Asian regions 2015; Fu et al., 2017). Molecular analysis has like China, Korea, Thailand, Vietnam, Laos, been simplified in a PCR reaction using PCR Mongolia as well as some parts of Russia, primers designed based on RAPD amplicons and in China it is found as wild-borne in sev- in SCAR marker technique (Kumla, Doolgin- eral parts including Guizhou Hunan, Jiangxi, dachbaporn, Sudmoon, & Sattayasai, 2012; Fu Sichuan (Flora of China, 2017). P. chinense is et al., 2015). However, the genetic relationships useful against certain diseases like liver dam- between P. chinense and E. prostrate have age, chronic liver injury and hepatitis. Reports not been studied yet and there is no report on indicate it possess antioxidant and anticancer SCAR marker development from E. prostrate; properties, as well as being hepatoprotective, however, we developed P. chinensee-specific antiviral and antidiabetic (Cao et al., 2015; SCAR markers previously (Mei et al., 2017a). Feng, Wang, Dong, & Wu, 2001; Hu et al., Here in this study, the SCAR markers 2015; Huang et al., 2015; Lu, Jiang, Jiang, specific to E. prostrate were developed, which Zhang, & Zhang, 2012; Wang, Liu, & Feng, can genetically identify and distinguish the 2006; Wang et al., 2014; Wang, Lin, & Wang, medicinal plant E. prostrate from closely 2015; Wang et al., 2017; Zhang, Xu, Jiang, related herbal P. chinense Pursh, as well as & Jiang, 2013). In recent biotechnological era, different other organisms. types of molecular bio-techniques have been applied for genetic identification and authenti- MATERIALS AND METHODS cation of different plants, animals and bacteria. For example, AFLP (amplified fragment length DNA Extraction: A total of nine Pen- polymorphism), ISSR (inter-simple sequence thorum chinense Pursh accessions from differ- repeat), RAPD (random amplified polymorphic ent regions of China and one Eclipta prostrate DNA), SSR (simple sequence repeat), SCAR was described previously in Table 1 (Mei et (sequence characterized amplified region), al., 2017a). Other samples, Eclipta prostrate, TABLE 1 Sources of RAPD samples No. Name Sources Sample 1 Penthorum chinense Pursh Yingtan, Jiangxi YT 2 Penthorum chinense Pursh Anqing, Anhui AQ 3 Penthorum chinense Pursh Ankang,Shanxi AK 4 Penthorum chinense Pursh Chenzhou, Hunan CZ 5 Penthorum chinense Pursh Luzhou, Sichuan LZ 6 Penthorum chinense Pursh Xichang, Sichuan XC 7 Penthorum chinense Pursh Zunyi,Guizhou ZY 8 Penthorum chinense Pursh Yichang,Hubei YC 9 Penthorum chinense Pursh Xinzhou,Shanxi XZ 10 Eclipta prostrate Luzhou, Sichuan LZ Rev. Biol. Trop. (Int. J. Trop. Biol. ISSN-0034-7744) Vol. 68(1): 180-188, March 2020 181 Canarium album (Lour.) Raeusch, Dimocarpus TIANgel Mini DNA Purification Kit (DP209, longan Lour., Litchi chinensis Sonn., Mentha Tiangen reagents, Beijing, China). The vec- haplocalyx Briq., Lycium barbarumL., Angel- tor pGM-T (No. VT202) (purchased Tiangen ica sinensis (Oliv.) Diels, Ginkgo biloba L., reagents, Beijing, China) was sued for AT Herba Acroptili Repentis, Ganoderma lucidium cloning and the purified DNA fragments were (Leyss.ex Fr.) Karst. , Ganoderma japonp- ligated. Then they were transformed into DH5α cum, Gardenia jasminoides Ellis, Artemisia E. coli competent cells, and spread on LB agar argyi H. Lév. and Vaniot, were also collected plates containing ampicillin (100 μg/μl), X-gal from different parts of China. Genomic DNA (40 mg) and IPTG (160 μg). The plates were was isolated from fresh leaves of the collect- then incubated at 37 °C for overnight, and the ed plants by using modified Cetyl Trimethyl white colonies were screened out by blue white Ammonium Bromide (CTAB) method, and the screening. The correct insert was confirmed by DNA quality was checked by agarose gel elec- PCR, where T7/SP6 primer pairs were used. trophoresis (0.8 %) and spectrophotometry (Fu, The colony PCR condition was as follows: (1) 2012; Fu et al., 2013). The plants were care- initial denaturation at 95 °C for 90 s, then (2) fully identified and the specimens have been 35 cycles of denaturation at 94 °C for 40 s, deposited at the source bank of the Southwest annealing at 60 °C for 30 s, extension at 72 °C Medical University. for 90 s, and (3) a final extension step at 72 °C for 5 min, with “Applied Biosystems Veriti® Improved RAPD Amplification: Differ- 96-Well Thermal Cycler”. PCR products were ent DNA samples were used for PCR amplifi- then run on 1.5 % agarose gel for electropho- cation with RAPD primers A11, and N7. The resis (Mei et al., 2015a; Khan
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