Rare deer's gut microbes crack tough reed grass better than relatives
Wei L, Cui Z, Mu Z, Li Y, Deng F
Gut Microbiome
The reeds lining wetland trails and drainage ditches are notoriously hard for animals (and industry) to break down, but this deer's gut bacteria have figured out how, hinting at enzymes that could someday help compost or convert stubborn plant fiber.
Reed grass is packed with tough fiber that most plant-eating animals struggle to digest. Researchers compared two related deer species living on reed-heavy diets and found that the endangered Tarim red deer carries a richer mix of gut bacteria specially equipped to dismantle that fiber, complete with higher levels of the enzymes that do the actual breaking-down work. When they transferred these deer's gut microbes into lab mice, the mice's ability to handle a reedy diet changed too, suggesting these microbial teams could be borrowed for other uses, like breaking down plant waste.
Key Findings
Tarim red deer (TH) showed higher fecal microbial diversity and greater abundance of fiber-degrading bacteria (Ruminococcaceae, Lachnospiraceae, Alistipes) than the related Tianshan red deer (TS).
TH fecal samples had higher cellulase and hemicellulase activity and degraded reed straw faster in lab (in vitro) tests than TS samples.
Transplanting TH gut microbiota into antibiotic-treated mice on a reed-containing diet altered the mice's fiber-related gut bacteria, metabolites, body weight, and intestinal structure.
chevron_right Technical Summary
An endangered Chinese red deer subspecies has gut bacteria that are unusually good at breaking down tough, fibrous reed grass, and scientists found the specific microbes and enzymes responsible. The discovery could eventually help turn woody plant waste into usable products.
Abstract Preview
Original paper
Comparative fecal microbiome and metabolome reveal enhanced lignocellulose-degrading potential in Cervus elaphus yarkandensis.
Reed is rich in lignocellulose and is therefore challenging for many ruminants to use efficiently. The endangered Tarim red deer subspecies Cervus elaphus yarkandensis (TH) inhabits the Tarim Basin...
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Reed is the common name for several tall, grass-like plants found in wetlands.