Biologia plantarum 2016, 60:452-458 | DOI: 10.1007/s10535-016-0611-9

Identification, validation, and expression of ABC transporters in Podophyllum hexandrum and their role in podophyllotoxin biosynthesis

P. Kumar1, R. Sharma1, V. Jaiswal1, R. S. Chauhan1,*
1 Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, Solan, India

Podophyllum hexandrum Royle is an important medicinal herb of North-Western Himalayas, and podophyllotoxin, being its major metabolite, has been used extensively in the preparation of several anticancer drugs. Podophyllotoxin accumulates in rhizomes; however, no information exists on the role of ATP-binding cassette (ABC) transporters vis-à-vis podophyllotoxin content. The present study reports identification, validation, and expression analysis of ABC transporter genes from P. hexandrum. Total 252 ABC transporter genes were identified as unigenes out of which 22 were further validated using real time qPCR in different tissues of varying podophyllotoxin content. Differential expression analysis and Pearson's correlation coefficient revealed two candidate genes PhABC6 and PhABCIII having a positive correlation with the podophyllotoxin content. PhABCIV showed the highest expression in rhizomes (20.53-folds compared to shoots) suggesting its possible role in transport and accumulation of podophyllotoxin.

Keywords: gene expression; transcriptome
Subjects: ABC transporters; podophyllotoxin; gene expression; transcriptome analysis
Species: Podophyllum hexandrum

Received: July 30, 2015; Revised: December 2, 2015; Accepted: December 4, 2015; Published: September 1, 2016Show citation

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Kumar, P., Sharma, R., Jaiswal, V., & Chauhan, R.S. (2016). Identification, validation, and expression of ABC transporters in Podophyllum hexandrum and their role in podophyllotoxin biosynthesis. Biologia plantarum, 60(3), 452-458. doi: 10.1007/s10535-016-0611-9.
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