Transcript Plant Structure and Function 2014using

PLANT STRUCTURE AND FUNCTION
IS IT A STEM, LEAF, ROOT,
FLOWER, FRUIT OR SEED?
Food
Broccoli
Cabbage
Carrot
Celery Stalk
Corn Kernel
Garlic
Onion
Potato
Tomato
Zucchini
Part of Plant
IS IT A STEM, LEAF, ROOT,
FLOWER, FRUIT OR SEED?
Food
Broccoli
Part of Plant
Flower
Cabbage
Carrot
Celery Stalk
Flower
Root
Stem
Corn Kernel
Garlic
Onion
Seed
Root
Root
Potato
Tomato
Zucchini
Root
Fruit
Fruit
PLANT BODY
Shoot system =
leaves + stem
Root system
THREE TYPES OF PLANT TISSUES
Vascular Tissue
Transport
Support
Ground Tissue
Synthesis of Sugars
Storage
Support
Dermal Tissue
Protection
PLANT BODY
Leaf = blade + petiole
Functions
Exposes surface to sunlight
Major site of photosynthesis
Conserves water
Provides for gas exchange
Blade
Petiole
Stoma =
opening in the leaf
for gas exchange,
water evaporation
Conserves water
Photosynthesis
STRUCTURES OF THE LEAF
Transports water
and sugar to stem
and roots
PLANT BODY
Stem: series of nodes and internodes
Functions
Holds leaves up to light
Transports substances
through vascular tissue
Xylem conducts water
and minerals
Phloem transports
sugar
PLANT BODY
Root
Functions
Anchors plant in soil
Takes up water and
minerals from soil
FLOWERING
PLANT
REPRODUCTION
Flowers are modified
leaves, specialized
for reproduction.
Flower
Mitosis
Meiosis
Mitosis
Pollen
grains
Ovule
Angiosperms are seed bearing &
fruit producing or flowering plants.
Flowers
Come in many different shapes,
sizes and colors, but they all
have the same functions:
 help plants reproduce.
 where seeds are made.
Flowers are the sexual reproductive
organs of plants.
All flowers, regardless of variety,
have the function of seed formation and
the production of more plants.
Flowers contain both non-reproductive
and reproductive structures.
THE PARTS OF A FLOWER
Most flowers have
four parts:
sepals,
petals,
stamens,
carpels.
THE PARTS OF A FLOWER
Sepals protect the
bud until it opens.
Petals attract
insects.
Stamens make
pollen.
Carpels grow into
fruits which contain
the seeds.
Anther
Male Parts
This is the part of
the stamen that
produces and
contains pollen. It is
usually on top of a
long stalk that looks
like a fine hair.
When the grains
are fully grown, the
anther splits open. Draw and label this sketc
Filament
Male Parts
This is the fine
hair-like stalk that
the anther sits on
top of. The part of
a stamen that
supports the
anther of a flower
(the stalk of the
stamen).
Draw and label this sketc
Male Parts
Stamen
This is the male part
of the flower. It is
made up of the
filament and anther,
it is the pollen
producing part of the
plant. The number of
stamen is usually the
same as the number
of petals.
Draw and label this
sketch in your notes.
Female Parts
Stigma
The sticky
surface at the top
of the pistil.
 It traps and
holds the pollen
and starts the
fertilization
process.
Female Parts
Style
The tube-like
structure that
holds up the
stigma.
Female Parts
Ovary
The part of a
plant, usually at
the base of the
flower, that has
the seeds inside
and turns into the
fruit that we eat.
Female Parts
Ovule
The
structure in a
flower that
develops into
a seed when
fertilized.(egg
s)
Female Parts
Carpel/Pistil
The carpel is the female
reproductive organ of a
flower. It makes the seeds.
It is made up of the
stigma, style, and ovary.
There may be more than
one carpel in a flower.
Pollen - powdery grains that contain the
male reproductive cells of most plants.
Pollen is produced by the anthers.
POLLINATION
Flowering plants use
the wind, insects,
bats, birds and
mammals to transfer
pollen.
When pollination occurs, pollen moves from the male
parts to the female parts. Pollen grains land on the
stigma and a tiny tube grows from it and down the
style into the ovary.
The fertilized ovule becomes
the seed and the ovary becomes
the fruit.
Pollen is the powdery grains that
contain male reproductive cells of
most plants produced by anther.
Flowering plants use the wind ,
insects bats, birds and mammals to
transfer pollen, When pollination
occurs, pollen moves from the male
parts to the female parts
. Pollen grains land on the stigma and
a tiny tube grows from it and down
the style into the ovary.
The fertilized ovule becomes the seed
and the ovary become the fruit.
Pollen grains land on the stigma and
a tiny tube grows from it and down
the style into the ovary. The
fertilized ovule becomes the seed
and the ovary become the fruit.
Male part
A COMPLETE FLOWER HAS BOTH
Produces pollen
Pistil
Stamen
MALE AND FEMALE PARTS
Anther
Filament
Attracts
pollinator
Stigma
Petal
Style
Sepal
Ovary
Female part
Produces egg
Encloses and
Protects Bud
Mature Pollen
Grain
Sperm Cells
Tube Cell Nucleus
2. pollen tubes grow
down stigma to ovary
Sperm
1. pollen grains
land on stigma
Stigma
Style
3B: Fusion of 2nd
sperm + two
polar nuclei
3. double
fertilization
3A: Fusion of
sperm + egg
Ovule
Polar nuclei
Ovary
Egg
POLLINATIO
N AND
FERTILIZATIO
N IN A
DEVELOPMENT OF FRUIT AND SEEDS
FROM FLOWER PARTS
Provides nutrition
Endosperm
Triploid
Endosperm
Cell Fresh
Fruit
Ovary
Seed
Integument
Coat
Diploid
Embryo
Zygote
(new
plant)
Seed = embryo + stored food + seed coat
Fruit = ovary wall, mechanism for seed dispersal