What is root cap? Which any two variations are found in this?

morphology

#1

What is root cap? Which any two variations are found in this?


#2

The apex of each root is covered by a cushion of thin-walled cells known as root cap.
Variations:
(i) Multiple root cap is present in Pandanus.
(ii) In aquatic plants, the root apex is enclosed within a sac-like structure called root packet, e.g., Pistia, Eichhornia, etc.