Phenylacetic and phenylpropionic acids do not affect xylan degradation by Ruminococcus albus.
Since the addition of either ruminal fluid or a combination of phenylacetic and phenylpropionic acids (PAA/PPA) has previously been shown to dramatically improve cellulose degradation and growth of Ruminococcus albus, it was of interest to determine the effects of these additives on xylan-grown cultures. Although cell-bound xylanase activity increased when either PAA/PPA or ruminal fluid was added to the growth medium, total xylanase did not change, and neither of these supplements affected the growth or xylan-degrading capacity of R. albus 8. Similarly, neither PAA/PPA nor ruminal fluid affected xylan degradation by multiple strains of R. albus when xylan prepared from oat spelts was used as a carbohydrate source. These results show that the xylanolytic potential of R. albus is not conditional on the availability of PAA/PPA or other components of ruminal fluid.
Reveneau
Carine
C
The MAPLE Research Program, Department of Animal Sciences, The Ohio State University, Columbus, Ohio 43210, USA.
Adams
Sarah E
SE
Cotta
M A
MA
Morrison
M
M
D000818:Animals; D001673:Biodegradation, Environmental / Q000187:drug effects; D003470:Culture Media; D010648:Phenylacetates / Q000378:metabolism / Q000494:pharmacology*; D010666:Phenylpropionates / Q000378:metabolism / Q000494:pharmacology*; D045857:Ruminococcus / Q000254:growth & development / Q000378:metabolism*; D014990:Xylans / Q000378:metabolism*
D003470:Culture Media; D010648:Phenylacetates; D010666:Phenylpropionates; D014990:Xylans; C025136:phenylacetic acid