title: [The changes of cell structure in the courses of Armillaria mellea penetrating the nutritional stems of Gastrodia elata].
abstract: 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.
  
  
  METHODS
  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.
  
  
  RESULTS
  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.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Department of Mycology, Institute of Medicinal Plant Development, CAMS, PUMC, Beijing 100094, China. jintangxu@fm365.com
authors.forename: J T
authors.initials: JT
authors.lastname: Xu
mesh_terms: D000363:Agaricales; D031668:Gastrodia / Q000166:cytology* / Q000254:growth & development / Q000382:microbiology*