Page 16 - LN-ANATOMY OF FLOWERING PLANT

(iv) Radial bundles more than eight.
(v) Xylem exarch.
(vi) Presence of an exodermis.
Differences between Dicot Root and Monocot Root

ysboiviedonous Stem
The transverse section (TS ) of a typical young dicotyledonous stem shows the
following areas
1.Epidermis
The outermost protective layer of the stem is called epidermis. It is covered with a
thin-layer of cuticle and may bear trichomes and a few stomata. The cuticle protects
the tissues from injury as well as diseases from the entry of fungal spores and
bacteria. It also helps to prevent loss of water.

2.Cortex
This layer lies just below the epidermis and extends till endodermis. Its various parts
are hypodermis, general cortex and endodermis.
Hypodermis It is just below the epidermis consisting of collenchymatous cells. The
cells contain chloroplasts. It provides mechanical strength to the stem.
General Cortex It is located just below the hypodermis and consists of a few layers
of parenchymatous cells. These cells are thin-walled and may contain chloroplasts.