@article{Saiju_Bajracharya_Rajbahak_Ghimire_2019, title={Comparative Study of Growth Statistics of Two Species of Paulownia and Optimization of Rooting Methods}, volume={6}, url={https://www.nepjol.info/index.php/NJB/article/view/22330}, DOI={10.3126/njb.v6i1.22330}, abstractNote={<p>Paulownia is a fast-growing woody tree, native to the forests of China. It belongs to the family Scrophulariaceae and is mainly used as a source of wood for furniture and musical instruments. Due to its fast-growing nature and high-quality of wood, there has been growing interest in cultivation and research of <em>Paulownia </em>in Nepal. Growth comparison was performed by measuring shoot length in <em>in vitro </em>condition. Among two species of <em>Paulownia </em>- <em>Paulownia tomentosa </em>(Thunb.) Steud and <em>Paulownia fortuneii </em>(Seem.) Hemsl., the growth rate of <em>P. tomentosa </em>was found to be 0.355 cm/week while that of <em>P. fortuneii </em>was found to be 0.637 cm/week in <em>in-vitro </em>conditions in MS medium supplemented with 0.1 mg/l NAA and 1mg/l BAP. Optimization of rooting methods was also performed, in which, sand rooting was found to be easier and more effective than <em>in-vitro </em>rooting. Dipping the plantlets in 1 mg/l of NAA was found to produce longer and denser roots than lower or higher concentrations during sand rooting.</p>}, number={1}, journal={Nepal Journal of Biotechnology}, author={Saiju, Hari Krishna and Bajracharya, Abhishesh and Rajbahak, Brishav and Ghimire, Stuti}, year={2019}, month={Jan.}, pages={11–15} }