biology – 328 lab
DESCRIPTION
Biology – 328 Lab. Plants and People. Objective. To understand what a fruit is To study different parts of fruit To learn different types of fruits. Background. Different parts of a fruit. Exocarp – Outermost layer Endocarp – Innermost layer Mesocarp – Middle layer - PowerPoint PPT PresentationTRANSCRIPT
BIOLOGY – 328 LAB BIOLOGY – 328 LAB Plants and Plants and People People
Objective
To understand what a fruit is
To study different parts of fruit
To learn different types of fruits
Background
Different parts of a fruit
Exocarp – Outermost layer Endocarp – Innermost layer Mesocarp – Middle layer
Pericarp - All three layers not recognizable
Rind - Thick leathery covering exocarp (eg, water melons) or fusion of exocarp and mesocarp (eg. Orange)
Accessory fruit – Fruits not derived from ovarye.g. apple
Classification of fruits Simple fruit – Fruit from a single flower
and single ovary
Aggregate fruit – Fruit from a single flower but several ovaries eg. Blackberry, strawberry
Multiple fruit – Fruit from multiple flowers in the same peduncle eg. Pineapple, Mulberry
Simple fruits Dry dehiscent fruit – Pericarp dries and
splits open when ripe. Follicle – 1 locule that splits along one suture e.g. Sweet gum Legume/pod – 1 locule and splits along 2
sutures e.g. Beans Capsule – 3 or more locules and splits in 3 or
more sutures e.g. Okra
Simple fruits Dry indehiscent fruit – Pericarp dries but
does not split when ripe Samara – 1 or 2 seeded with pericarp flattened
into wings e.g. maple Grain/Caryopsis – 1 seeded fruit with seed
fused to pericarp e.g. corn Achene – 1 seeded fruit with seed free from
pericarpe.g. sunflower
Nut – 1 seeded fruit enclosed in huske.g. Pecan
Simple fruits Fleshy fruit- Pericarp doesn't dry when ripe
Berry – entire pericarp is fleshy e.g. Grape Pepo – Exocarp is a hard rind e.g. Melons
Hesperidium – Exocarp and mesocarp is a hard rind, endocarp has juice vesicles e.g. Orange
Drupe or stone – a single seeded fruit fuzzy or smooth skin, fleshy mesocarp and a hard stony endocarpe.g. Peach
Pome – Fleshy receptacle, hypanthium with papery pericarp e.g. Apple
Today’s LabCarefully examine the fruits, paying special
attention to their morphology, structure, family and scientific name, and geographic origin. During the exercise, answer the following questions for each fruit observed.
1. What is the fruit type?2. How many carpels are present?3. How might they might be dispersed in nature.
Summary
Today’s Lab Types of fruits and
characteristics
Next week’s lab – Major Families I
Quiz on Fruits