We made an experiment with a Salvia hispanica (Chia) from seed in pot with sieved non-sterilised growing media (a mix of pure sand and a clayey vertisol, i.e. a Typic Chromoxerert with around 2.0% organic matter content) and surface-sterilised seed.
At the end of the experiment, in some plants we found these sort of clustered roots, that we do not believe are 'cluster roots' sensu strictu, nor we have information about this species behaviour. In other species (cereals) we never found something like this in similar conditions.
Anybody knows what it is?
They do form arbuscular mycorrhizas, but it doesn't look like that. Something that resembles ECTOs or Frankia symbiosis?
possibly a callus. Cut it and place in a growth medium with rooting hormones. if even the smallest pieces root, then you have a means of propagation.
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