The objective of the study was to find the explant resources, the type and concentration of plant growth regulators (PGRs), as well as the in vitro culture conditions suitable for different morphogenesis processes - callus induction, direct embryogenesis, shoot and root formation, etc. The growth and development of in vitro Ngoc Linh ginseng derived from thin cell layer (TCL) was examined in Quang Nam to assess the adaptability of in vitro Ngoc Linh plantlets in its natural territory, compared to those growing in Bidoup - Nui Ba National Park, Lam Dong. | MINISTRY OF EDUCATION VIETNAM ACADEMY OF AND TRAINING SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY OF SCIENCE AND TECHNOLGY ----------------------------- VU THI HIEN REGENERATION AND MICROPROPAGATION OF Panax vietnamensis Ha et Grushv. USING THIN CELL LAYER TECHNOLOGY Major Plant Physiology Code SUMMARY OF PHILOSOPHY DOCTORAL DISSERTATION ON BIOLOGY Ho Chi Minh City - 2018 The work was realized in Graduate University of Science and Technology Vietnam Academy of Science and Technology Advisor 1 Prof. Duong Tan Nhut . Advisor 2 Thai Xuan Du . Reviewer 1 . Reviewer 2 . Reviewer 3 . The thesis will be evaluated by doctoral committee at Graduate University of Science and Technology Vietnam Academy of Science and Technology on .2018 The thesis is available at - Library of Graduate University of Science and Technology - National Library of Vietnam 1 INTRODUCTION 1. The necessity of the dissertation Ngoc Linh ginseng is a Vietnamese endemic ginseng with the scientific name Panax vietnamensis Ha et Grushv. Since discovered in 1973 it can be said that Ngoc Linh ginseng is one of the most important medicinal plants. Many reports indicated that Ngoc Linh ginseng has not only the pharmacological characteristics of a Ginseng but also the individual characteristics such as anti-stress decrease of depression and anxiety stimulation of the immune system resistance to cytotoxic toxins antioxidant in vitro and in vivo etc. The success of propagation of Ngoc Linh ginseng is still limited because this species is only grown on Ngoc Linh mountain. To harvest gingseng roots the propagation period lasts 6 to 7 years to store enough bioactivities. Our thesis entitled quot Regeneration and micropropagation of Ngoc Linh ginseng Panax vietnamensis Ha et Grushv. using thin cell layer technique quot has been carried out. The aim of this study is to obtain a number of vigorous plantlets with and high quality roots and tubers especially they are well adapted to the natural .
