151. RNA-seq analysis reveals the significant effects of different light conditions on oil degradation by marine Chlorella vulgaris
- Author
-
Bao Bo, Mu Jun, Mutai Bao, Mei Liu, Li Jingjing, Jun-Zhi Liu, and Qingguo Chen
- Subjects
0106 biological sciences ,0301 basic medicine ,chemistry.chemical_classification ,Light ,Sequence Analysis, RNA ,Chlorella vulgaris ,Heterotroph ,Metabolism ,Aquatic Science ,Biodegradation ,Oceanography ,01 natural sciences ,Pollution ,03 medical and health sciences ,Biodegradation, Environmental ,Petroleum ,030104 developmental biology ,Enzyme ,Hydrocarbon ,chemistry ,Degradation (geology) ,Food science ,Mixotroph ,010606 plant biology & botany - Abstract
Marine Chlorella vulgaris, an efficient hydrocarbon-degrading organism, is easily affected by light. In this study, we investigated the direct effects of different light conditions on crude oil degradation by C. vulgaris and its crude enzyme. Under 12 h illumination, the crude enzyme improved hydrocarbon removal by 39.36%, whereas the addition of the enzyme and C. vulgaris increased the degradation rate by 121.73%. Conversely, the addition of enzyme under heterotrophic condition was negatively related to oil degradation by C. vulgaris, and the degradation rate decreased from 74.32% to 48.65% and further reduced by 34.54%. The results of RNA sequencing analysis suggested that hydrocarbons removal was attributed to C. vulgaris metabolism in heterotrophic physiological state. While enhanced removal efficiency of hydrocarbons was achieved in mixotrophic physiological state due to the coupling of C. vulgaris metabolism with photocatalytic oxidation. Functional enzymes played key roles in photocatalysis and biodegradation processes.
- Published
- 2018