Isolation of a pink-pigmented facultative methylotrophic bacteria and its growth-promoting effect on pepper plants

作者：Yang, Ting; Shi, Fachao; An, Yuxing; Sun, Donglei; Lu, Yinglin^*

来源：Current Science, 2022, 123(2): 214-219.

DOI：10.18520/cs/v123/i2/214-219

• Growth promotion
• indole-3-acetic acid
• Methylobacterium populi
• nitrogen fixation
• pepper plants
• sugarcane rhizosphere

Microorganisms offer a low-cost, eco-friendly alternative to chemical fertilizers. A pink-pigmented facultative methylotrophic bacterium Gen-B2 was isolated from sugarcane rhizosphere and its growth-promoting activity was detected using in vitro experiments. Based on morphological, biochemical and molecular characteristics, Gen-B2 was identified as Methylobacterium populi. Pepper seedling inoculation significantly benefitted shoot/root fresh/dry weight, plant height, chlorophyll content and average true leaf number. Determination of activities related to growth promotion indicated that Gen-B2 promoted plant growth through nitrogen fixation and indole acetic acid synthesis. The present study suggests that this bacterium has great potential to be used as a bioinoculant for sustainable cultivation.

• 单位
  广东省农业科学院