天麻营繁茎被蜜环菌侵染过程中细胞结构的变化

The Changes of Cell Structure in the Courses of Armillaria mellea Penetrating the Nutritional Stems of Gastrodia elata

目的 研究天麻营繁茎被蜜环菌侵染后细胞结构的变化，及天麻整个生长期的营养来源。方法 作天麻营繁茎连续纵切片结合横切片观察；在天麻生长期切断其与菌材连接的蜜环菌索，测量新生麻生长情况。结果 蜜环菌索侵入天麻营繁茎后，分成多个分枝的菌丝通道，菌丝突破通道形成菌丝流，向外侵入皮层细胞形成菌丝结，向内直接侵入大型细胞被天麻消化作为营养；切断天麻与菌材连接的蜜环菌索，新生麻就停止生长。结论 蜜环菌索侵入天麻营繁茎后，菌丝结、突破菌丝通道的菌丝流，及大型细胞等三层细胞层呈片状环周包围了整个营繁茎，菌丝通道是天麻整个生长期营养的补给线。

Objective To study the cell structure changes of Gastrodia elata after Armillaria mellea infection as well as the nutritional resource of this important medicinal plant. Method Observation of the serial sections on the nutritional stems of G.elata, and measure new corms of G.elata when cut off the old corms connection with rhizomorph of A. mellea. Result After G.elata nutritional stems infected by A. mellea, the rhizomorph of A.mellea separate into several hyphal layers and penetrate hyphal stream which infect into the cells of cortex layer in the direction of outside and infect directly into layer cells in the direction of inside, these hypha can be used the nutrition of G.elata the new corms will be stop growth if cut off the rhizomorph of A. mellea connected with G.elata. Conclusion After the rhizomorph of A.mellea infected G.elata nutritional stems, hyphal coils and the hyphal stream will breakthrough passage cells as well as large cells surround the whole nutritional stems, so the passage cells is the key nutritional resource in the whole growth period of G. elata.