A study on mycorhizal associations in an economically important orchid
Keywords:
epiphytes, fungi, media, mycorrhiza, orchids, RhizoctoniaAbstract
The present work is based on mycorhizal association in Aerides multiflora (an orchid) with emphasis on extent of infusion, fate of fungal partner, isolation and identification of fungi. Mycorrhizal association plays an important role in growth and development in the orchids. It was observed that the fungal partner entered to cortex. Fungal entered through roots, mediated through the thin walled ‘passage cells. The fungal entophytes were identified as anamorphs of Rhizoctonia species, based on their morphological (bi- to multinucleate condition, fungal clamps, mycelial loops, and formation of ‘moniliods’) and growth characteristics on different media. MS and PDA followed by Mitra media found to be more perfect for growth and extraction of fungus. PDA is found to be most suitable for isolation generally.
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