A second important feature is the development of rhizomorphs by some fungi . 第二个重要的特征是一些真菌有发达的菌根。
2.
Comparision of polysaccharide and its immunological activity from the different rhizomorph of armillaria mellea 野生和人工培养蜜环菌菌索多糖含量及免疫活性的比较
3.
But armillaria has the unique ability to extend rhizomorphs , flat shoestringlike structures , that bridge gaps between food sources and expand the fungus ' s sweeping perimeter ever more 但奥氏蜜环菌有独特的生长方式：延伸菌根，连接食物源与菌体，然后迅速向外生长。
4.
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 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。
5.
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 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。
6.
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 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。
