Ecofriendly conversion of algal waste into valuable plant growth-promoting rhizobacteria (PGPR) biomass

With the development of marine biorefinery concept, utilisation algal waste during industrial processing as well some “green tide” biomass has become an important research topic. In this work, a single-step microwave process was used to hydrolyse Laminaria japonica (LJW) and Enteromorpha prolifera (EP), producing growth medium suitable for microbial cultivation. The contained range mono- polysaccharides macro- micronutrients that could be by microbes. cultivation behavior three plant growth-promoting rhizobacteria (PGPR) strains (Bacillus subtilis strain Tpb55, Bacillus amyloliquefaciens Cas02, Burkholderia pyrrocinia Lyc2) in two media were investigated. LJW hydrolysate from 180 °C EP 150 performed better efficiency than those hydrolysates other conditions. Saccharide analysis showed microbes metabolized monosaccharide such glucose, mannose cultivation, leaving polysaccharide unused medium. Furthermore, hydrolysate-strain mixtures applied pepper growth. hydrolysate-Cas02 broth effect compared treatments, which might attributed higher indole-3-acetic acid (IAA) production Cas02 hydrolysate. This work shed lights on conversion PGPR co-application hydrolysates- promotion.