Download Angiosperm Reproduction

AngiospermReproduc0on
Botany2
Mrs.Russell
Characteris0csofAngiosperm
•  Vascular
•  FloweringPlants
•  Seedsinfruit
•  Dominantsporophytegenera0on
•  Doublefertliza0on
Vascular
•  Xylem—water
transport,deadcells,
flowsonlyup
•  Phloem—sugar
transport,livingcells,
flowsupanddown
2Classes
Eudicots(Dicots)
-Roses,sunflowers,
gingko
-Herbaceousandwoody
-Branchedveins
-Flowerpartsin4sor5s
-2cotyldedons
Monocots
-Grasses
-Mainlyherbaceous
-Parallelveins
-Flowerpartsin3s
-1cotyldedon
TheFlower
4Parts:
1.  Sepals—enclosesdevelopingbud
2.  Petals—colorful
3.  Stamens—male:Filamentand
anther
4.  Carpels—female:Sigma,
styleandovary
Stamen
Wherepollenis
produced
Thestalk
Carpel
catchespollengrains
elevatesthes0gma
wheremegaspores(eventuallyafemale
gametophyte)areproduced
S"gma+Style=Gynoecium
TypesofGynoecium
1.Monocarpous—1pis0l,1ovary,1s0gma
2.Apocarpous—manycarpelsseparatefromoneanother
3.and4.Syncarpous—carpelsarefused(ovariesonlyors0gmaand
ovaries)
Complete
Containsthefourmain
partsofaflower
Example:Roses
Incomplete
Lacksoneormoreof
thefourmainpartsofa
flower
Examples:Squash,
corn,mostgrasses
Imperfect
Perfect
Hasmaleandfemale
Doesnotcontainboth
parts
maleandfemaleparts
*Allcompleteflowersare
perfectflowers
Reproduc0onMethods
•  Pollina0on
–  Wind
–  Water
–  Pollinators
•  Germina0on
•  DoubleFer0liza0on—joiningof1female
gametophytewith2malegametophytes
SeedandFruitForma0on
1. 
2. 
3. 
4. 
Ovule(a]erpollina0on)developsintoseed
Ovarywallenlarges—becomesthefruit
Flowerpartsfalloff
Seedprotectedbythefruit
Whyangiospermsarethemost
dominant…
Seedshaveanadvantageoverspores
Crosspollina0onallowsformorevaria0on
Widerdispersalmethods
Broadleavesaremoreefficientatphotosynthesis
Abscissionreduceswaterloss