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Screening for lignin degrading bacteria by means of14C-labelled lignins

✍ Scribed by K. Haider; J. Trojanowski; V. Sundman

Publisher
Springer
Year
1978
Tongue
English
Weight
339 KB
Volume
119
Category
Article
ISSN
0302-8933

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✦ Synopsis

Several Nocardia and Pseudomonas spp., as well as some unidentified bacteria, isolated from lake water containing high loads of waste lignin, were tested for their capacity to release ~4CO2 from specifically 14C-labelled dehydropolymer of coniferyl alcohol (DHP) or corn stalk lignins. The bacteria were selected according to their ability to degrade phenolic compounds. However, only some of them could release significant amounts of 14CO2 from the labelled lignin. The tested Nocardia spp. were more active than the Pseudomonas spp. and the unidentified bacteria. The most active strains belonged to N. autotrophica. These strains released COzsignificantly from the methoxyl group and transformed the other cat'bons from the phenylpropane skeleton of lignin also into CO 2. Other less demethylating strains also released little CO 2 from the other carbons of the lignin molecule. From corn stalk materials which were specifically labelled in the lignin part, only small amounts of labelled CO 2 were released.

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