Abstract
Abstract we report A. rhizogenes-induced hairy root formation in S. bryopteris, a medicinally and commercially important plant. A. rhizogenes strain LBA1334 co-cultivated with explants (root, rhizophore, stem portion near the root, and stem with intact fronds) for 24 and 48 h after transformation for induction of hairy roots. The induction of hairy root was observed after 6 days of infection in case of 48 h co-cultivation only. PCR with rolA and virC gene specific primers confirmed the induced hairy roots were due to Ri T-DNA integration and not due to contaminating A. rhizogenes. The root network as explants showed the maximum transformation efficiency. We tested different media like MS, SHFR (Stage Hog Fern Root) and KNOP’s during transformation for hairy root induction. The SHFR based media showed good response in transformation as well as propagation. Further, transformation efficiency was enhanced by addition of TDZ (2 mg/L) and Bevistin (0.1%) in SHFR media. The present work would be helpful in hairy roots-based in vitro production of secondary metabolites and on aspect of functional genomics of S. bryopteris.
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