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Effect of ligninolytic axenic and coculture white-rot fungi on rice straw chemical composition and in vitro fermentation characteristics

The study sought to investigate the potentials of axenic cultures of Pleurotus ostreatus , Phanerochaete chrysosporium and their coculture ( P. chrysosporium and P. ostreatus ) to break down lignin and to enhance the rumen fermentability of rice straw. Rice straw was fermented by two lignin-degradin...

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Bibliographic Details
Published in:Scientific reports 2022-01, Vol.12 (1), p.1129-1129, Article 1129
Main Authors: Datsomor, Osmond, Gou-qi, Zhao, Miao, Lin
Format: Article
Language:English
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Summary:The study sought to investigate the potentials of axenic cultures of Pleurotus ostreatus , Phanerochaete chrysosporium and their coculture ( P. chrysosporium and P. ostreatus ) to break down lignin and to enhance the rumen fermentability of rice straw. Rice straw was fermented by two lignin-degrading fungi, namely, P. ostreatus , P . chrysosporium and its coculture ( P . ostreatus and P . chrysosporium ) with uninoculated straw as control under solid-state fermentation employing a completely randomized research design. The coculture exhibited a mutual intermingling plus inhibition interaction. The fungi treatment increased the crude protein from (5.1%) in the control to (6.5%, 6.6%, and 6.7%) in the P . ostreatus , P . chrysosporium and coculture respectively. The coculture treated straw had a lower lignin content (5.3%) compared to the P . chrysosporium (6.2%) with the P . ostreatus recording the least (3.3%) lignin fraction. Treatment of rice straw with coculture improved the in vitro dry matter digestibility (68.1%), total volatile fatty acids (35.3 mM), and total gas (57.4 ml/200 mg) compared to P . chrysosporium (45.1%, 32.2 mM, 44.4 ml/200 mg) but was second to P . ostreatus (75.3%, 38.3 mM, 65.6 ml/200 mg). Instead of an anticipated synergistic effect from the coculture, a competitive antagonistic effect was rather observed at the end of the study, a condition that can be attributed to the coculture behavior.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-05107-z