Preliminary findings on identification of mycorrhizal fungi from diverse orchids in the Central Highlands of Madagascar

Mycorrhiza
Kazutomo YokoyaViswambharan Sarasan

Abstract

The Orchid flora of Madagascar is one of the most diverse with nearly 1000 orchid taxa, of which about 90% are endemic to this biodiversity hotspot. The Itremo Massif in the Central Highlands of Madagascar with a Highland Subtropical climate range encompasses montane grassland, igneous and metamorphic rock outcrops, and gallery and tapia forests. Our study focused on identifying culturable mycorrhizae from epiphytic, lithophytic, and terrestrial orchid taxa to understand their diversity and density in a spatial matrix that is within the protected areas. We have collected both juvenile and mature roots from 41 orchid taxa for isolating their orchid mycorrhizal fungi (OMF), and to culture, identify, and store in liquid nitrogen for future studies. Twelve operational taxonomic units (OTUs), of three known orchid mycorrhizal genera, were recognized by analysis of internal transcribed spacer (ITS) sequences of 85 isolates, and, by comparing with GenBank database entries, each OTU was shown to have closely related fungi that were also found as orchid associates. Orchid and fungal diversity were greater in gallery forests and open grasslands, which is very significant for future studies and orchid conservation. As far as we know, this...Continue Reading

References

Nov 1, 1991·Plant Molecular Biology·P TaberletJ Bouvet
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Jun 22, 2007·Mycorrhiza·John D W Dearnaley
Oct 28, 2008·Conservation Biology : the Journal of the Society for Conservation Biology·Charlotte Murray-SmithEve J Lucas
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Jan 1, 2013·Applications in Plant Sciences·Tharangamala SamarakoonMac H Alford

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Citations

May 11, 2018·Botanical Studies·Emily SchofieldViswambharan Sarasan
Aug 18, 2020·Mycorrhiza·Alen K EskovVladimir G Onipchenko

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