Impact of Growth-Promoting Endophytic Bacteria on Ginger Plant Growth

Abstract

Phytohormones has produced by endophytic bacteria promote the development and yield in plants. To investigate the role of endophytic bacteria on the soil properties and the growth of ginger, a net house experiment was carried. The experiment was used four treatments (Control, Bacillus subtilis IGPEB 34, Bacillus pumilis IGPEB 37, and Bacillus altitudinis IGPEB 20). Bacillus subtilis IGPEB 34 and B. pumilis IGPEB 37 significantly increased plant growth (the plant height, leaf number, leaf length, and leaf width) as compared to the control treatment. Moreover, inoculation of B. subtilis IGPEB 34 treatment significantly enhanced the total chlorophyll, chlorophyll a, chlorophyll b and carotenoid contents. In comparison to the control, inoculation B. subtilis IGPEB 34 treatment significantly enhanced the catalase, invertase and phosphatase activities in soil, the total phosphorus (P), potassium (K), carbon (C), and humus contents in the soil. The results concluded that B. subtilis IGPEB 34 strain positively influence the soil nutrients, along with morphological and physiological characteristics of ginger.