Evaluation of Environmental Bacterial Communities as a Factor Affecting the Growth of Duckweed Lemna minor

摘要: Duckweed (family Lemnaceae) has recently been recognized as an ideal biomass feedstock for biofuel production due to its rapid growth and high starch content, which inspired interest in improving their productivity. Since microbes that co-exist with plants are known have significant effects on according the previous studies terrestrial plants, this study attempted understand plant–microbial interactions of a duckweed, Lemna minor, focusing promotion/inhibition so assess possibility accelerated duckweed by modifying co-existing bacterial community. Co-cultivation aseptic L. minor communities collected from various aquatic environments resulted changes ranging −24 +14% compared control. A number strains were isolated both growth-promoting growth-inhibitory communities, examined growth. Irrespective source, each strain showed promotive, inhibitory, or neutral when individually co-cultured minor. To further analyze among these community, binary combinations promotive inhibitory resulting promotive–promotive inhibitory–inhibitory generally similar those individual strains. However, promotive–inhibitory tended show while only Aquitalea magnusonii H3 exerted plant effect all tested. Significant change was observed co-cultivated environmental communities. Promotive, neutral, bacteria community would synergistically determine effects. The results indicate via regulation