Question

why do the monocotyledonous roots not undergo any secondary growth ? discuss in brief​

Answer 1

why do the monocotyledonous roots not undergo any secondary growth

The vascular cambium is only single layer in thickness and adds xylem on the inside and phloem on the outside of it. In trees, the secondary xylem forms the wood and the secondary phloem forms the bark. In cases of monocots, who lack cambium, secondary growth is not seen. The stems do not get as wide as in the dicots.

Answer 2

Answer:

Cambium is absent in monocotyledons

Explanation:

Secondary growth is initiated by the activity of the vascular cambium as far as the steler region is concerned.This intrafascicular cambium is absent in the open vascular bundles of the monocot stem, thus the process cannot take place . Secondary growth in the extrasteler region is initiated by the production of secondary vascular tissue. Since, as explained above, monocots do not undergo secondary growth in the steler region, there are no secondary tissues to initiate such a growth in the extrasteler region.