The growth of Gastrodia elata Bl. and Armillaria mellea (Vahl. ex Fr.) Quel. shares a special symbiotic relation. In general, A. mellea invades the G. elata , the epidermal cells, the cortical cells and the large cells of the growing vegetative propagation corm of G. elata . The empty cavity cells, the cork cells of the isolation in the vegetative propagation corms and the large cells of G. elata were the defensive structure, protecting the new G. elata from pathological invasion by A. mellea . In winter, G. elata enters the stage of hibernation. The faulting layer derived from the cork cells of the isolation was the last defensive structure by which new G. elata could safely live through the winter.
天麻的营养繁殖茎及其抑菌功能
徐锦堂 兰进
（中国医学科学院中国协和医科大学药用植物研究所，北京1000094）
摘要：天麻（Gastrodia elata Bl.）与蜜环菌（Armilla riamellea (Vahl.ex Fr.)Quel.）营共生生活，在正常情况下蜜环菌只侵染种麻及分化生长出的营养繁殖茎的表皮、皮层及大型细胞层。种麻的大型细胞层及营养繁殖茎隔离区的空腔细胞层和木栓细胞层，都是种麻与新生麻的防御结构，它们保护新生麻不遭蜜环菌病理侵染而正常生长。冬季，天麻进入冬眠期，隔离区的木栓细胞层形成断裂层，此层细胞是新生麻能够安全越冬的最后一道防御结构。
关键词： 天麻；营养繁殖茎；蜜环菌；大型细胞；空腔细胞；木栓细胞
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