Page 41 - Pharmacognosy 2 PG303

Pharmacognosy-2 (PG303) Level 2 Clini

Fruit intr

Definition:

It is developed ovary or ovaries of a single flower or of a w

Fruit is a mature fertilized ovary.

function:

protect, nourish and insure the distribution of the seed.

Fruit composed of:

1-pericarp 2-seed

➢ Pericarp composed of three layers:

1-exocarp (epicarp)=outer layer
2-Mesocarp=middle layer
3-endocarp= inner layer

Types of fruit:

1-True fruits: formed from the gynoecium
2-False fruits: other parts of the flower contribute to its fo

➢ Parthenocarpy:

Development of fruit without fertilization, so the fruit is s
Ex: pineapple, banana, cucumber, grape, orange, persimm

✓ Results from one of three causes:
1-lack of pollination
2-pollination occurs but fertilization does not
3-fertilization is followed by embryo (seed) abortion.
Thus, fruits of cucumber contain seed-like structures, but