| Photosynthetic bacterial strains were isolated from pond water samples and sediment of Litopenaeus vannamei. They were evaluated comprehensively one after another for their cultural broth characters, crude protein content, carotenoid, amino acids, categories as well as content of Co Q to screen strains with abundant nutrition component for fine appetizing fishing bait for fishes, shrimps, and shells. The experiments were isolated a total 35 strains of photosynthetic bacteria, among them 11 strains had homogenous, stable and bright color cell liquid; 9 strains had above 60% crude protein; 3 strains Rh16, Rh25 and Rh34 had carotenoid content obviously higher than other strains (P<0.05), and their ratio of essential amino acids and total amino acids were 41%, 41%, and 40% respectively, the containing ubiquinone was Q10, among them Rh16 had the highest content of Q10, at 6.49 μg/mL, which can be developed as fine appetizing bait for aquacultural animals. According to analyses of cultural morphology, physio-biochemical characteristics and 16S rRNA gene sequence, Rh16 was identified as Rhodopseudomonas faecalis. |
