Abstract:In 1978 Armillaria mellea was preliminarily observed to reduce the germination of the seeds of Gastrodia elata. It was recently confirmed that Armillaria mellea had an inhibitory effect on the early stage of seed germination of Gastrodia elata. An aseptic filtrate wilh the metabolic products of Armillaria mellea was added the medium, upon which the seeds were sown. The experiment showed that the metabolites acted as inhibitors in the process of seed germination of Gastrodia elata.