Response of barley to root colonization by Pseudomonas sp. DSMZ 13134 under laboratory, greenhouse, and field conditions

[摘要] Beneficial rhizobacteria strains are of substantial interest as biological plant protection agents in agriculture. Bacteria ofthe genus Pseudomonas have been studied for many years for their role in plant growth and biocontrol. In this study, we analyzed the influence of the commercially available agent Proradix†, which contains the strain Pseudomonas sp. DSMZ 13134, on barley. In controlled infection experiments, we showed that Pseudomonas sp. DSMZ 13134 induces resistance to the barley leafpathogen Rhynchosporium secalis and inhibits the growth ofthe barley root pathogen Gaeumannomyces graminis. In greenhouse experiments, Pseudomonas sp. DSMZ 13134-treated plants showed enhanced growth and yield under nutrient deprivation. In field trials, an increase ofyield and straw weight was observed. While the quality ofgrains, as determined by starch and protein content, was not affected, the yield increased by up to 20%. Our results demonstrate the value of Pseudomonas sp. DSMZ 13134 in agronomical applications for barley.

[学科分类] 纳米科学和纳米技术

[关键词] Proradix†;plant growth promotion;induced systemic resistance;biocontrol;field trials