Transcript Vascular System PPT

Plant Vascular System
and
Transpiration
Plant Vascular System
Plant Vascular System Function

The plant vascular system
takes water and nutrients
from the ground, through
the root system, and up into
the leaves, flower petals and
fruits.
Plant Vascular System
Xylem – vascular tissue in plants that carries
water upward from the roots to every part of
a plant. The presence of xylem allows a
gardener to only have to water the soil
around a plant, not the actual plant leaves.
Since Xylem
carries water,
water flow can
act as a skeletal
system
providing the
plant support
Plant Vascular System



Phloem has a similar
function to the xylem, except
that phloem moves nutrients
throughout the plant instead of
water.
Transports carbohydrates made
during photosynthesis.
Nutrients required by plants
 Macronutrients
 Nitrogen, Phosphorus,
Potassium
 Micronutrients
 Chlorine
 Iron
 Manganese
Phloem-
Transpiration
Transpiration
Transpiration – loss of water from a plant
through it’s leaves.
1.
2.
3.
4.
5.
water enters the root.
moves up the
vascular tissue (xylem).
enters the leaves.
exits the leaves
by way of the stomata.
evaporates into the
atmosphere.
Transpiration
The movement is caused
by the combination of
root pressure and
capillary action which
provides enough force
to move water through
the xylem tissue of
even the tallest plant.
Transpiration
Roots are
responsible to
bringing the
water into the
plant.
Transpiration
Because roots grow
in soil, scientists
must find unique
methods to study
them. This clover
root is growing in
agar so it can be
observed.
Transpiration
Vocabulary
Stoma (stomata) – opening in the underside of
a leaf that allows CO2 and O2 to diffuse into
and out of the leaf.
Transpiration
Vocabulary
Guard Cells - cells surrounding each stoma. They
help to regulate the rate of transpiration by opening
and closing the stomata. (Remember hypotonic and
hypertonic vocab.)
Stomatal Closing
1. Potassium ions move out of the vacuole
and out of the cells.
2. Water moves out of the vacuoles,
following the potassium ions.
3. The guard cells shrink in size.
4. The stoma closes.
Stomatal opening
1. Potassium ions move into the vacuoles.
2. Water moves into the vacuoles, following
potassium ions.
3. The guard cells expand.
4. The stoma opens.
Transpiration
Transpiration
True or False??
Animals respire, plants do not.
False!
Plants have mitochondria too. Plants take in
H2O from the roots and CO2 from the leaves to
make O2. The mitochondria in the plant then
converts the O2 and C6H12O6 into the energy
(ATPs) the plant needs in order to grow and
perform biological processes.
Transpiration
Pearson Lab Bench Activity
http://www.phschool.com/science/biology_place/labbench/lab9/intro.html
Videos
http://www.youtube.com/watch?v=tRNe_UHw7F4&featur
e=related
http://www.youtube.com/watch?v=mc9gUm1mMzc
Informative video:
http://www.youtube.com/watch?v=fNtFwQ4NpDg