Degradation of polyvinyl alcohol by Sphingomonas sp. SA3 and its symbiote.
A total of 800 samples was taken from Taegu province, Korea, where many textile factories provide a source of polyvinyl alcohol (PVA) waste. These samples were screened for PVA-degrading bacteria. A new strain, SA3, was discovered which formed yellow colonies and used PVA as the sole carbon and energy source. Strain SA3 was identified as a Sphingomonas sp., based on the partial nucleotide sequence analysis of 16S ribosomal RNA, the presence of 2-hydroxymyristic acid (14:O 2-OH) and sphingolipids with d-17:0, d-18:0, d-19:1, and d-20:1 as the main dihydrosphingosines. This genus has not previously been reported as a PVA-degrading bacterium. Sphingomonas sp. SA3 needs a symbiote strain, SA2, for PVA degradation as a growth factor producer. In mixed cultures of these strains, the optimum temperature for PVA biodegradation ranged from 30 degrees C to 35 degrees C. The optimum pH was 8.0 and the most effective nitrogen source was NH(4)(+).[1]References
- Degradation of polyvinyl alcohol by Sphingomonas sp. SA3 and its symbiote. Kim, B.C., Sohn, C.K., Lim, S.K., Lee, J.W., Park, W. J. Ind. Microbiol. Biotechnol. (2003) [Pubmed]
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