Fruits And Seeds Flashcards
Definition of zygote
Embryo
Def of integuments
Seed coat
The different kinds of fruit are characterized by what
Characteristics of the pericarps (old ovary wall)
Nature of the pericarp determines what
Dry or fleshy
Determining whether or not the pericarp pops open at maturity
Dehiscent or indehiscent
Simple
Single ovary
Aggregate
From many ovaries of same flower
Multiple
Fro, fused ovaries of many flowers
Pericarp fleshy
- Berry a) pepo b) hesperidium 2. Drupe 3. Pome
Pericarp dry
Dehiscent: a) legume b) capsule
Indehiscent
A) Samara b) grain c) achene d) nut
Hilium (dicot)
Oval scar where seed broke free from the funiculus
Microphyle (dicot)
Opening for pollen tube allowing air and water into seed
Embryonic axis
Epicotyl above cotyledons (plumule with embryotic leaves)
A grain isn’t a seed but rather a
Fruit
What are the two protective sheaths in monocot seed
Coleorhiza to protect radicle and coleoptile to protect plumule
Bran
Pericarp + aleurone layer speeds up movement through digestive tract
Germ
Embryo high oil content reducing storage time
Factors needed for all seeds
- Water to swell seed coat and flush out any chemical inhibitors 2. Oxygen for mitochondria to produce ATP 3. Freezing temps to break down any chemical inhibitors
Factors needed in special cases of seeds
- Light for weedy species 2. Fire to dry out cones for shedding on to open nutrient rich ground 3. Digestive enzymes to weaken seed coat and allow water penetration for germination
