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Phyllanthus fraternus is an important medicinal plant, popularly known for its hepatoprotective and antiviral activities since ancient times. Various physiological factors like carbon sources, concentration of agar, pH of the media and effect of season of explants collection were optimized for high frequency regeneration of P. fraternus. The frequency of regeneration, average number and length of shoots were highly influenced by the type and concentration of carbon sources (monosaccharides and disaccharides, 1 to 4%), agar concentration (0.2 to 1%) and pH (4.5 to 6.8) of the media. Media containing 3% sucrose, 0.6% agar at pH 5.8 was best for regeneration. Seasonal variation of explants collection significantly affected the axillary shoots proliferation from explants and best proliferation was observed from explants collected during April to June. Genetic fidelity of regenerated plants was assessed by random amplified polymorphic DNA markers. No polymorphism was detected in micropropagated plants and the mother plant, revealing the genetic homogeneity of the in vitro raised plantlets. This is the first report regarding establishment of genetic fidelity of micropropagated P. fraternus plants, which could be successfully applied for the mass multiplication, germplasm conservation and further genetic transformation assays to meet the ever increasing demand of this medicinally potent plant for industrial and pharmaceutical uses.

biologia

Assessment of factors on shoot proliferation potential of nodal explants of Phyllanthus fraternus and assessment of genetic fidelity of micropropagated plants using RAPD marker