TY - JOUR AU - Nguyen, Hoang Thi Phuong AU - Nguyen, Phan Xuan AU - Hang, Nguyen Thi Thanh AU - Khiem, Dinh Van PY - 2018/12/06 Y2 - 2024/03/29 TI - Effect of growth regulators on the in vitro propagation and ex vitro root formation of Gnetum gnemon var. griffithii Markgr JF - Academia Journal of Biology JA - AJB VL - 40 IS - 3 SE - Articles DO - 10.15625/2615-9023/v40n3.12601 UR - https://vjs.ac.vn/index.php/vjbio/article/view/12601 SP - AB - <p>This study is to investigate the <em>in vitro</em> propagation and <em>ex vitro</em> root formation of <em>Gnetum gnemon</em> var.<em> griffithii</em> Markgr (<em>G. gnemon)</em>,<strong> </strong>one of the nutrient-rich forest vegetables. The results showed that MS medium supplemented with 1.5 mg l<sup>-1</sup> BAP was the most suitable combination for shoot formation after 90 days of culture. The combination between 1 mg l<sup>-1</sup> BAP and 0.5 mg l<sup>-1</sup> NAA gave the best <em>in vitro</em> rooting rate (40%) after 60 days culture. After 60 days tranfered to the greenhouse, plantlets which planted on the substrate of coconut fiber powder had a better growth (plant height of 6.14 cm, root length of 6.90 cm) than those on a combination substrate of coconut fiber powder and sand (1:1). In additional, plantlets treated with 3.0 mg l<sup>-1</sup> IBA for 1 minute had the highest root formation rate (80%), the greatest root number per plantlet (2.80 roots), and the longest root (1.76 cm) when compared with those in different of treatment.</p><p>Nodal segments, <em>PGRs</em>, root formation, shoot formation.</p> ER -