Abstract

The genus Methylobacterium was reported about the ability to stimulate plant growth by producing phytohormones. In this research, we investigate the effect of several Methylobacterium strain (M.. thiocyanatum JCM 10863T (MT), M.. radiotolerans JCM 2831T (MR), M. fujisawaense JCM 10890T (MJ), M. extorquens JCM 2802T (ME), M. oryzea 1021b, M. radiotolerans 1019 và M. fujisawaense 1024) on the germination of, tomato, green bean, yard long bean and bean pole. The results showed that all strains positively affected seed germination and every strain was specific on one or some kinds of seed. The biomass lyophilizing method or lyophilizing with activated charcoal did not maintain the activity of bacteria while the use of seeds as carrier ensured the effect of those strains.