APPLICATION OF PLANT GROWTH-PROMOTING BACTERIA FOR SUSTAINABLE NGOC LINH GINSENG (Panax vietnamensis Ha et Grushv.) CULTIVATION IN CHU YANG SIN NATIONAL PARK (DAK LAK)

Tóm tắt

This study evaluates the efficacy of Plant Growth-Promoting Bacteria (PGPB) (Bacillus velezensis, Bacillus subtilis, and Lactobacillus acidophilus) in mitigating disease vulnerability and slow growth rates of Ngoc Linh ginseng during its translocation to Chu Yang Sin National Park. After a three-month experimental period, these microbial groups significantly optimized the adaptability and systemic resistance of the plants during the ex vitro stage. The treatment supplemented with, Bacillus subtilis demonstrated the most prominent results, achieving a survival rate of 75.68% (an 86.54% increase over the control) and a three-fold enhancement in height growth. These beneficial microorganisms established a robust 'biological barrier,' effectively suppressed damping-off disease and providing potential control against pests such as grasshoppers and mealybugs. Regarding phytochemical properties, HPLC analysis confirmed that the concentrations of major saponins, G-Rg1 (1.02%) and G-Rb1 (1.74%), reached accumulation levels superior to previously reported data for plants of the same age. The findings confirm that the application of beneficial bacteria is a sustainable and viable cultivation strategy for conserving genetic resources and ensuring the characteristic medicinal quality of Ngoc Linh ginseng in new ecological regions.