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Use of bean husk as an easily digestible fiber source for activating the fibrolytic rumen bacterium Fibrobacter succinogenes and rice straw digestion. 2012

Ryosuke Fuma, and Shinya Oyaizu, and Yoko Nukui, and Tin Ngwe, and Takumi Shinkai, and Satoshi Koike, and Yasuo Kobayashi
Research Faculty of Agriculture, Hokkaido University, Kita, Sapporo, Japan.

A series of in sacco and in vitro studies were carried out to evaluate bean husks for activation of fibrolytic rumen bacteria and rice straw digestion. First, lablab bean husk, chickpea husk and rice straw were suspended in the rumen of sheep to analyze the bacterial consortium developed on each fiber source. Known members of fiber-associating bacteria were found on both lablab bean husk and rice straw, but some of these bacteria were lacking on chickpea husk. Second, a pure culture study was carried out using six strains of Fibrobacter succinogenes. Both husks stimulated the growth of all tested strains, including a strain that did not grow on rice straw. The strain OS128 that showed the highest growth on rice straw displayed even higher growth on lablab bean husk without a time lag. Finally, two-step incubations were carried out to determine whether prior incubation of rumen fluid with husks stimulates subsequent rice straw digestion. Higher digestibility of rice straw was recorded in the second-round incubation following the first incubation with bean husks. These results suggest that the tested bean husks improve the digestion of rice straw by activating fibrolytic F. succinogenes and other associated bacteria.

UI MeSH Term Description Entries
D004043 Dietary Fiber The remnants of plant cell walls that are resistant to digestion by the alimentary enzymes of man. It comprises various polysaccharides and lignins. Fiber, Dietary,Roughage,Wheat Bran,Bran, Wheat,Brans, Wheat,Dietary Fibers,Fibers, Dietary,Roughages,Wheat Brans
D004063 Digestion The process of breakdown of food for metabolism and use by the body.
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000821 Animal Feed Foodstuff used especially for domestic and laboratory animals, or livestock. Fodder,Animal Feeds,Feed, Animal,Feeds, Animal,Fodders
D012275 Oryza A genus of grass family (Poaceae) that include several rice species. Oryza sativa,Rice,Rices
D012417 Rumen The first stomach of ruminants. It lies on the left side of the body, occupying the whole of the left side of the abdomen and even stretching across the median plane of the body to the right side. It is capacious, divided into an upper and a lower sac, each of which has a blind sac at its posterior extremity. The rumen is lined by mucous membrane containing no digestive glands, but mucus-secreting glands are present in large numbers. Coarse, partially chewed food is stored and churned in the rumen until the animal finds circumstances convenient for rumination. When this occurs, little balls of food are regurgitated through the esophagus into the mouth, and are subjected to a second more thorough mastication, swallowed, and passed on into other parts of the compound stomach. (From Black's Veterinary Dictionary, 17th ed) Rumens
D012756 Sheep Any of the ruminant mammals with curved horns in the genus Ovis, family Bovidae. They possess lachrymal grooves and interdigital glands, which are absent in GOATS. Ovis,Sheep, Dall,Dall Sheep,Ovis dalli
D045730 Soy Foods Foods made from GLYCINE MAX. Soy foods are high in DIETARY PROTEINS and PHYTOESTROGENS such as ISOFLAVONES. Soy Sauce,Texturized Soy Protein,Tofu,Bean Curd, Soy,Miso,Natto,Soy Cheese,Tempeh,Texturized Vegetable Protein,Bean Curds, Soy,Cheese, Soy,Cheeses, Soy,Curd, Soy Bean,Curds, Soy Bean,Food, Soy,Foods, Soy,Protein, Texturized Soy,Protein, Texturized Vegetable,Proteins, Texturized Soy,Sauce, Soy,Soy Bean Curd,Soy Bean Curds,Soy Cheeses,Soy Food,Soy Protein, Texturized,Soy Proteins, Texturized,Texturized Soy Proteins,Vegetable Protein, Texturized,Vegetable Proteins, Texturized
D045848 Fibrobacter A genus of gram-negative, anaerobic bacteria in the family Fibrobacteraceae, isolated from the human GASTROINTESTINAL TRACT.

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