| To some extent roots are like our hair, nails, skin etc. It is constantly being grown new and the old and unneeded are discarded.
It is hard to explain what is discarded roots and being composted back into nature and what is fungal or bacterial rot, that can spread throughout the plant and kill it. You have to look at the overall health of the plant and make a judgment.
Your plant does not show any signs of fungal growth. The roots were at the bottom of the pot and growing in a circle. Eventually the roots got too long and the plant did not want, or need, to draw water through that long root. The plant discarded them as unneeded.
Nature will naturally compose these roots back into humus. However, these are areas where fungal rot can attack so you should remove them when re-potting.
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jerry  |