Bacterial community structure in the rhizosphere of fungi-infected .

The rhizosphere is a narrow soil area directly affected by plant root exudates. Microbes inhabiting the rhizosphere have been widely studied for their beneficial effects on plant nutrition, growth, and disease prevention. Many factors affect the rhizosphere microbial composition, including plant pathogen infection.

Indigenous bacteria, an excellent reservoir of functional plant growth promoters for enhancing duckweed biomass yield on site.

The advantages of aquatic biomass production using wastewater as a cost-free fertilizer have recently been highlighted. Here, we report a successful study in which duckweed, Lemna gibba, biomass production in a food factory effluent containing low nitrogen and high salts was enhanced by employing customized plant growth-promoting bacteria (PGPB). Two common PGPB strains previously obtained from natural pond water, Acinetobacter calcoaceticus P23 and Pseudomonas fulva Ps6, hardly promoted the growth of duckweed; on the contrary, they inhibited its growth in treated factory wastewater, far different water conditions.