Termite guts: the world's smallest bioreactors
Termite guts: the world's smallest bioreactors
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DOI：
10.1016/s0167-7799(97)01151-7
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发表时间：
1998-01-01
影响因子：
17.3
通讯作者：
Brune, A
中科院分区：
文献类型：
--
作者：
Brune, A
长期以来，白蚁后肠一直被认为是简单的缺氧发酵罐，类似于牛的瘤胃。这一概念受到最近采用微传感器技术的研究的挑战，该研究表明，肠道微生物群的代谢活动在肠腔内维持陡峭的氧和氢梯度。只有扩张的肠道区域的中心呈现缺氧，然而，产甲烷菌在微氧消化道外围形成主要的氢汇。在以土壤为食的白蚁的极碱性后肠（pH >12）中，木质纤维素衍生的土壤有机物质在不同的pH和氧水平下进行连续培养。
Termite hindguts have long been considered simply to be anoxic fermenters, similar to the rumen of cattle, This concept was challenged by recent investigations employing microsensor techniques, which demonstrated that the metabolic activity of the gut microbiota maintains steep oxygen and hydrogen gradients within the gut lumen, Only the centre of the dilated gut regions is rendered anoxic, yet methanogens form a major hydrogen sink in the microoxic gut periphery, In the extremely alkaline hindguts of soil-feeding termites (pH >12), lignocellulose-derived soil organic matter is subject to a sequential incubation at varying pH and oxygen levels.