A Study on the Mycorrhizal Microstructure of Six Orchids
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The observation on the microstructure of six orchids demonstrated that they have the typical orchidaceous roots with velamen and thick cortical tissue. Mycorrhizal fungi invaded the cortical tissue through the exodermal passage cells or destroyed part of the velamen tissue and exodermal cells , and then formed endomycorhiza with the orchid root.