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Orchids Support Seedlings Through ‘Parental Nurture’ via Shared Underground Fungal Networks
(www.sheffield.ac.uk)
This isn't that much of a breakthrough, mycorrhizal fungi has been known to help shuttle nutrients across the root structures of different plants. It does sound like the Orchid attracts the myco naturally, which only a few plants do.
The cannabis and competitive growing communities are pretty big on using myco on transplant so the plants can absorb nutrients better.