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大熊猫的主食竹类粗纤维含量很高,而大熊猫自身的消化系统不能降解纤维素。现已从大熊猫的肠道正常菌群中鉴定出涵盖7个菌门的22种菌,相关的研究证明大熊猫的肠道正常菌群能降解纤维素。大熊猫肠道中的假单胞菌产生的漆酶能对竹纤维中的木质素进行氧化,使纤维素得以暴露,梭菌属、淀粉芽胞杆菌等产生的纤维素酶将其降解成大熊猫可利用的糖类。其具体机制有待进一步研究。
Giant panda bamboo staple fiber content is high, while the panda’s own digestive system can not degrade cellulose. Altogether 22 strains of bacteria belonging to seven fungis have been identified from the gut normal flora of giant pandas. Relevant studies have shown that the normal gut flora of giant pandas can degrade cellulose. Laccase produced by Pseudomonas in the gut of the giant panda can oxidize the lignin in the bamboo fiber, exposing the cellulose to cellulolytic enzymes produced by Clostridium, Bacillus amyloliquefaciens, etc., degrading it into giant panda The use of sugar. Its specific mechanism needs further study.