Page 80 - PG 101-Course notes مذكرة النظري 24-25 with spec

Medicinal plants (PG 101) Level 1 Clinical Pharmacy-PharmD

2- Digestive glands:

 Certain plants possess a highly characteristic method of nutrition known as the

insectivorous or carnivorous habit.

The function of these glands:

1- pour out a sticky secretion to aid in insect capture.

2- Or to supply protein-digesting enzymes, these enzymes act upon the captured
organisms so that the products of digestion can be absorbed by plant.

3- Nectaries

o These are simply modified patches of the epidermis found in most flowers (rare

in leaf or stem where they are called extra-floral).
o The epidermis of these gland areas has no cuticle.
o They secreted sugary substance, known as nectar, it serves to attract insects.

4- Hydathodes (water stomata)

-It associated with water excretion.

o It is a permanently open stomata supplied beneath with a strand of vascular

cells.
o On warm damp nights, when abundant absorption occurs and the stomata are
closed, the excess moisture is removed through these glands.

o Hydathodes often occur at leaf margins

5- Ducts

✓ Resins, latex, gums are often secreted and conducted within the plant body in

ducts.

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