In vitro stimulation of cellulose digestion and anaerobic microbial populations by mixed rumen microorganisms with rumen anaerobic fungal culture.

Lim J.H., . and Lee S.S., . and Lee S.J., . and Lee S.M., . and Moon J.Y., . and Jung H.Y., . and Ahn B.H., . and Ha J.K., . (2004) In vitro stimulation of cellulose digestion and anaerobic microbial populations by mixed rumen microorganisms with rumen anaerobic fungal culture. [Proceedings Paper]

Cultures of the rumen anaerobic fungus Piromyces communis strain 22 culture AFC filtere AFC and autoclaved AFC were evaluated for their ability to influence cellulose digestion and microbial population by mixed ruminal microorganisms in vitro. The addition of AFC filtered AFC and autoclaved AFC caused a marked increase in cellulose digestion especially showing the significant P less than 0.05increase by 26 31 and 22 after fermentation for 30h respectively compared with control. The addition of AFC also significantly P less than 0.05 increased not only the numbers of total bacteria cellulolytic bacteria and anaerobic fungi but also the enzyme activities data not shown compared with the control treatment. Moreover the addition of fungal fermentation end-products filtered and autoclaved AFC also had some stimulatory effects on mixed rumen microorganisms. There may be several mechanisms involved in the positive responses of the addition of rumen fungal cultures and their end-products on the rumen fermentation and ecosystem. It is suggested that the positive responses be caused by high fibrolytic enzyme addition from the fungal cultures and increased microbial poulation despite of the antagonistic relationship of fiber break down by rumen fungi to rumen bacteria and unknown inhibitor factors in the rumen fluids.

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Abstract

Cultures of the rumen anaerobic fungus Piromyces communis strain 22 culture AFC filtere AFC and autoclaved AFC were evaluated for their ability to influence cellulose digestion and microbial population by mixed ruminal microorganisms in vitro. The addition of AFC filtered AFC and autoclaved AFC caused a marked increase in cellulose digestion especially showing the significant P less than 0.05increase by 26 31 and 22 after fermentation for 30h respectively compared with control. The addition of AFC also significantly P less than 0.05 increased not only the numbers of total bacteria cellulolytic bacteria and anaerobic fungi but also the enzyme activities data not shown compared with the control treatment. Moreover the addition of fungal fermentation end-products filtered and autoclaved AFC also had some stimulatory effects on mixed rumen microorganisms. There may be several mechanisms involved in the positive responses of the addition of rumen fungal cultures and their end-products on the rumen fermentation and ecosystem. It is suggested that the positive responses be caused by high fibrolytic enzyme addition from the fungal cultures and increased microbial poulation despite of the antagonistic relationship of fiber break down by rumen fungi to rumen bacteria and unknown inhibitor factors in the rumen fluids.

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Item Type:	Proceedings Paper
Additional Information:	Summary En
AGROVOC Term:	RUMEN MICROORGANISMS
AGROVOC Term:	FUNGI
AGROVOC Term:	CELLULOLYSIS
AGROVOC Term:	DIGESTION
AGROVOC Term:	MICROORGANISMS
AGROVOC Term:	NUTRITION PHYSIOLOGY
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:28
URI:	http://webagris.upm.edu.my/id/eprint/16730

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