BIOB38H3 Lecture Notes - Lecture 8: Black Pepper, Seedless Fruit, Citrus
Document Summary
Fruit wall is made from pericarp, which develops from the ovary wall. Sometimes it is thick and fleshy, sometimes it is hard and dry. Seed does not get its food from the fruit (it gets food from the endosperm) the fruit is for the animal to eat. The pericarp is the entire fruit, and we eat the part of it called the mesocarp. E. g. peach, tomato, grains, some nuts, peas. Outer pericarp is fleshy and juicy but can be thin and papery. Examples of simple fruit: drupe has thin exocarp, fleshy mesocarp, stony endocarp covering the seed: cherry, peach, plum, berry has thin exocarp, soft fleshy mesocarp and endocarp encloses one or many seeds: grapes, blueberries, tomato. Hesperidium berry ~ citrus fruit with tough leathery rind and has juice sac: orange, lemon. Aggregate fruit - single fruit from single ovary (each dot on strawberry came from ovary): strawberry, blackberry. Accessory fruit floral parts and ovary become incorporated into fruit: strawberry.
