世界最小生物反应器-白蚁肠道  

The world's smallest bioreactors: Termite guts

作　　者：李珺 张贞华[1] 李桃生[1] 

机构地区：[1]浙江大学西溪校区生命科学学院,杭州310012

出　　处：《白蚁科技》2000年第1期1-5,共5页

摘　　要：近期运用微传感技术（ｍｉｃｒｏｓｅｎｓｏｒ ｔｅｃｈｎｉｑｕｅｓ）有力否定白蚁肠道是发酵罐说法，证明由于肠腔微生物的新陈代谢作用，白蚁肠腔维持着一定浓度的Ｏ_２和Ｈ_２，只有后肠中央才是真正的无氧区。甲烷微生物（ｍｅｔｈａｎｏｇｅｎｓ）的存在使肠道微氧四周形成一个氢壑（ｈｙｄｒｏｇｅｎ ｓｉｎｋ）。食土性白蚁（ｓｏｉｌ－ｆｅｅｄｉｎｇ ｔｅｒｍｉｔｅｓ）肠道ＰＨ值极高（ＰＨ＞１２），土壤有机质在其肠道内历经不同ＰＨ与氧分压环境。Termite hindguts have long been considered to be anoxic fermentors. This concept has been challenged by recent investigations employing microsensor techniques. Only the centre of the dilated gut region is proved really anoxic. In the hindguts, oxygen is an important electron acceptor and hydrogen is a key metabolic intermediate. Methanogens form a major hydrogen sink in the microoxic gut periphery. The hindguts of soil - feeding termites are extremely alkaline (PH>12).

关 键 词：白蚁肠道 微生态环境 无氧发酵罐 

分 类 号：Q969.296[生物学—昆虫学]