IIRC, I have read somewhere that many plants do this. It is part of their symbiosis with bacteria and fungi in the soil, and the fungal networks extend far beyo

IIRC, I have read somewhere that many plants do this. It is part of their symbiosis with bacteria and fungi in the soil, and the fungal networks extend far beyond the plants' locations. In fact we humans also do it, willy-nilly. We have billions of gut and other bacteria in us, many times more than the number of cells in our own bodies.