Promoting Effect of Plant Hormone Gibberellin (Ga3) on Co-Metabolism of Sulfamethoxazole by Microalgae Chlorella Pyrenoidosa
In this study, sodium acetate (NaAC) as a co-substrate effectively promoted the metabolism of sulfamethoxazole (SMX) by microalgae Chlorella pyrenoidosa. In the cultivation supplied with 5.0 and 10.0 g L-1 NaAC, 51.1% and 61.2% SMX was removed, respectively. On this basis, the improvement effect of plant hormone gibberellin (GA3) on SMX removal by 5 g L-1 NaAC supplied as co-substrate was further investigated. The results showed that biodegradation played decisive role in the removal of SMX. As a plant hormone, GA3 effectively improved the co-metabolic removal efficiency of SMX by C. pyrenoidosa. Especially when GA3 dosage reached 10.0 and 50.0 mg L-1, C. pyrenoidosa showed a very high SMX removal rate of 83.5% and 95.3%, respectively. Transcriptome analysis showed that under the effect of exogenous 50 mg L-1 GA3, the up-regulated genes in microalgae were significantly enriched in GO terms related to matter and energy metabolism. In addition, KEGG enrichment analysis showed that exogenous GA3 was involved in signal transduction of endogenous plant hormones such as abscisic acid, ethylene, and salicylic acid in microalgae. Therefore, GA3 promoted the removal of SMX by C. pyrenoidosa in this study was the result of the combined action of exogenous and endogenous plant hormones
Year of publication: |
[2022]
|
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Authors: | Gao, Feng ; Yang, Lei ; Chen, Ai-Jie ; Zhou, Wang-Hao ; Chen, Dong-Zhi ; Chen, Jian-Meng |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
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