Bài giảng về sinh sản

Plant Reproduction
Chapter #4
What is the difference between Sexual Reproduction and Asexual Reproduction?
Sexual requires an egg and sperm
Asexual is vegetative
What are the Female parts of the flower?
Pistil: Stigma, Style, Ovary
Pollen lands on Stigma, travels down style to ovary
What is a Perfect Flower?
has Stamen & Pistil on same flower
only one part = imperfect
What is the difference between a Monoecious and Deoecious plant?
Monoecious: male & female flowers on same plant
Dioecious: male & female flowers on different plants
What are the other parts of the flower?
Calyx: all the sepals
Corolla: all the petals
What is a Complete Flower?
A flower that has all four major flower parts: Pistil, Stamen, Calyx, Corolla
What type of flower does the grass plant have?
has calyx, corolla, pistil, stamen
any missing parts = imcomplete
perfect & incomplete
What is a Floret?
basic flower unit
What is a Spikelet?
a group of florets
What are the types of Inflorescenses?
Panicle Inflorescence: (oats, some grasses) branched structure at tip of stem
What are the types of Inflorescenses?
Spike Inflorescence: (wheat, barley) spikelets attached directly to stem.
What are the types of Inflorescenses?
Raceme Inflorescence: (mustard, rapeseed) single flowers attached to stalk or stem.
What are the types of Inflorescenses?
Head Inflorescence: (sunflower) enlarged stem = receptacle
What is a Fruit?
An Apple or Tomato is considered a fruit. A Fruit is a mature ovary.
Fruits can be fleshy (tomato) or dry (wheat)
What is Pollination?
process of transferring pollen grains from the anther to the stigma
plants can be self-pollinated (male & female flowers on same plant) or cross-pollinated (different plants)
What is Fertilization?
when sperm is united with an egg
pollen lands on stigma, germinates, and grows down style to the ovary where sperm fertilizes the egg (pollen tube)
there are actually two fertilizations. Second sperm fertilizes second egg to form the endosperm (food for the seed)