flower flower the organ responsible for sexual reproduction in plants the organ responsible for...
TRANSCRIPT
FlowerFlower
The organ responsible The organ responsible for sexual for sexual reproduction in plantsreproduction in plants
Function- Function- produce gametesproduce gametes pollinationpollination fertilizationfertilization develop seedsdevelop seeds develop fruitdevelop fruit
4 Basic Whorls of a Flower4 Basic Whorls of a Flower
CalyxCalyx- Outermost - Outermost WhorlWhorl
All of the sepals All of the sepals collectivelycollectively
CorollaCorolla- 2- 2ndnd Outermost WhorlOutermost Whorl
All of the petals All of the petals collectively collectively
4 Basic Whorls of a Flower4 Basic Whorls of a Flower
StamenStamen- 3- 3rdrd Outermost Outermost WhorlWhorl Male structure of the Male structure of the
flowerflower PistilPistil- Made of fused - Made of fused
carpels- Innermost carpels- Innermost WhorlWhorl Female structure of Female structure of
flowerflower
Diagram 1- Flower StructureDiagram 1- Flower Structure
1. 1. PetalsPetals- - Colorful leaf-like parts, Colorful leaf-like parts,
attract animals/insects, attract animals/insects, aids in pollinationaids in pollination
2. 2. StamenStamen- - Male structureMale structure
Diagram 1- Flower StructureDiagram 1- Flower Structure
3. 3. PistilPistil- - Female structureFemale structure
44. . Pedicel/Pedicel/Receptacle-- Stalk like part, supports Stalk like part, supports
the flowerthe flower
Diagram 1- Flower StructureDiagram 1- Flower Structure
5. 5. SepalsSepals- - Small leaves that Small leaves that
surround and protect the surround and protect the flower bud flower bud
6. 6. StigmaStigma-- Sticky top to the pistil, Sticky top to the pistil,
collects the pollen during collects the pollen during pollinationpollination
Diagram 1- Flower StructureDiagram 1- Flower Structure
7. 7. StyleStyle- - Long stalk like part that Long stalk like part that
extends from ovary, extends from ovary, supports the stigmasupports the stigma
8. 8. OvuleOvule- - Located inside the Located inside the
ovaries, will develop into ovaries, will develop into a seed after fertilizationa seed after fertilization
Diagram 1- Flower StructureDiagram 1- Flower Structure
9.9. Ovary Ovary- - Enlarged base of the Enlarged base of the
pistil, will develop into pistil, will develop into fruit after fertilizationfruit after fertilization
10. 10. FilamentFilament- - Slender stalk that Slender stalk that
supports the anther of the supports the anther of the stamenstamen
Diagram 1- Flower StructureDiagram 1- Flower Structure
11. 11. PollenPollen- - Formed in the anther, Formed in the anther,
contains 2 nuclei, contains 2 nuclei, 1 tube 1 tube nucleusnucleus, , 1 generative 1 generative nucleusnucleus
12. 12. AntherAnther- - Knob like end of the Knob like end of the
stamen, forms the sperm stamen, forms the sperm nuclei and the pollen nuclei and the pollen grainsgrains
Diagram 2- Pollination (p 617)Diagram 2- Pollination (p 617)
The transfer of pollen from the anther to the stigma of flowers
Usually aided by insects or wind
Diagram 2- 2 typesDiagram 2- 2 types
Self pollinationSelf pollination Same plantSame plant Either the same flower Either the same flower
or 2 flowers on the or 2 flowers on the same plantsame plant
Or 2 genetically Or 2 genetically identical plantsidentical plants
Cross pollinationCross pollination Two genetically Two genetically
different plantsdifferent plants
Diagram 2- Pollination Diagram 2- Pollination Fertilization (p 617)Fertilization (p 617)
2 separate events2 separate events Pollination occurs on the Pollination occurs on the
stigmastigma
Fertilization occurs in Fertilization occurs in the ovulethe ovule
Diagram 2- After Pollination (p 617)Diagram 2- After Pollination (p 617)
Pollen grain releases tube & generative Pollen grain releases tube & generative nucleus into pistilnucleus into pistil #14. Tube nucleus develops pollen tube#14. Tube nucleus develops pollen tube #13. Two sperm nuclei- from mitosis of the #13. Two sperm nuclei- from mitosis of the
generative nucleusgenerative nucleus #15. Pollen tube develops through style to ovule#15. Pollen tube develops through style to ovule
2 sperm nuclei travel through tube to ovule2 sperm nuclei travel through tube to ovule
Diagram 2- Fertilization (p 617)Diagram 2- Fertilization (p 617)
Double fertilization in Double fertilization in the ovulethe ovule One sperm nucleus One sperm nucleus
fertilizes (#16) egg fertilizes (#16) egg nucleus to form the nucleus to form the zygote (fertilized egg), zygote (fertilized egg), this becomes the this becomes the embryonic plant of the embryonic plant of the seedseed
Diagram 2- Fertilization (p 617)Diagram 2- Fertilization (p 617)
Second sperm nucleus Second sperm nucleus unites with (#17) 2 polar unites with (#17) 2 polar bodies, forms triploid bodies, forms triploid (3n) cell that develops (3n) cell that develops into endosperm of the into endosperm of the seedseed
Diagram 3- Gamete Formation- Diagram 3- Gamete Formation- Male (p 615)Male (p 615)
Occurs in antherOccurs in anther SketchSketch Diploid Diploid Meiosis Meiosis 4 haploid cells 4 haploid cells Mitosis Mitosis Pollen grain with 2 Pollen grain with 2
nucleinuclei
Diagram 3- Gamete Formation- Diagram 3- Gamete Formation- Female (p 615)Female (p 615)
Occurs in ovuleOccurs in ovule SketchSketch Diploid Diploid meiosis meiosis 4 haploid cells(3 die) 4 haploid cells(3 die) mitosis mitosis mitosis mitosis mitosis mitosis 8 haploid cells (5 die) 8 haploid cells (5 die) 3 haploid cells3 haploid cells
Seed (p 620)Seed (p 620) An embryonic plant with An embryonic plant with
a food sourcea food source Grows into a new plant Grows into a new plant
Germination Germination Water, temp., oxygenWater, temp., oxygen
Plumule (shoot tip Plumule (shoot tip w/embryonic leaves)w/embryonic leaves)
Epicotyl (stem)Epicotyl (stem) HypocotylHypocotyl Radicle (root)Radicle (root) Cotyledon (food source)Cotyledon (food source) Endosperm (food source)Endosperm (food source)
Fruit (pp 618, 619) Fruit (pp 618, 619)
Surrounds seedsSurrounds seeds Dispersal of seeds- Dispersal of seeds-
spread seeds aroundspread seeds around WindWind WaterWater AnimalsAnimals
EdibleEdible CarrierCarrier