Induction of Callus and Ploidy Level Inspection from Tissue Culture of Sundew (Drosera indica L.) in Sterile Condition

Authors

  • Chatree Toomkum คณะวิทยาศาสตร์ มหาวิทยาลัยบูรพา
  • Sirasatiyakorn Junkasiraporn คณะวิทยาศาสตร์ มหาวิทยาลัยบูรพา

Abstract

The purpose of this study was to induce callus and determine ploidy level  from tissue culture of Drosera indica L. in sterile conditions. The leaf explants of Sundew were cultured on ½ MS (Murashige and Skoog, 1962) media supplemented with BA and NAA at different concentrations for 4 weeks. From the results, it was found that leaf explants cultured on ½ MS media containing 0.5 mg / l BA with NAA 0.1 mg / l could induce callus well and gave the highest callus induction percentage and callus fresh weight. On the other hand, leaf explants cultured on MS media supplemented with 1.0 mg / l BA in combination with 0.1 mg / l NAA had the highest number of shoot induction from callus. Then, the callus was cultured on ½ MS media without plant growth regulators for 4 weeks to induce new shoot. After that, cut the shoot to get the node explant size 2 ± 0.2 cm, then dipped in the ½ MS liquid media with the addition of 0, 0.1, 0.5, and 1.0 mg / l colchicine at period of 24, 48 and 72 hours. Then node explants were cultured on ½ MS solid media for 4 weeks. It was found that node explants immersing in liquid MS media without adding colchicine had the highest survival percentage. Furthermore, it could be seen that the survival percentage decreased as the concentration of colchicine increased as well as the immersion period increased. When analyzing ploidy levels with the flow cytometry technique, it was found that there were a number of chromosomes in the diploid. Then, the seedlings from tissue culture were transplanted in peat moss together with the sphagnum moss in the ratio of 1 : 2 for 4 weeks. The result showed that seedlings had the highest survival percentage. Keywords : callus, colchicine, flow cytometry,  ploidy, Drosera indica L.

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Published

2019-09-16