Chapter 7 ->
Transport in plants
The
·
Such as mineral ions and dissolve
organic compounds
substances transported water to form Solutions and these solutions moved
, ,
in are
through
specialised tubes .
·
These tubes form a
system called the vascular system .
Vascular Systems :
·
and Phloem (Vascular tissues)
contain 2 tissues Xylem .
fluid is called Sap
Xylem
·
direction , roots
Sap moves in tubes called Xylem Vessels ,
carrying mainly water/inorganizions in one to rest of the plant) .
Phloem many directions (from leaves/storage organs plant) .
·
tubes called Sieve tubes ,
carrying products of
photosynthesis rest of
in in to
sap moves
, ,
Structure of stem roots
,
and leaves and distribution of Xylem/phloem
Stem
·
roots and leaves the main involved in transport plants.
,
are
organs in
Dicotyledons
·
-
leaves with wide blades (laminal and narrow Stalks (petioles) .
2 cotyledons in the
embryo .
Low power plant diagrams
Phloem
·
is stained and has small cells .
Xylem is stained red and contains larger vessels .
green
In
·
stems and leaves and phloem found in vascular bundles in found at the center .
xylem are
,
roots
they are
Epidermis
·
is one cell thick and covers the outside of the plant.
·
Outer region of stems and roots is called cortex and is
mainly made of parenchyma .
Parenchyma
:
·
basic plant used tissue which is active and has functions such food storage and roles
cells tissue as
packing metabolically as , Support in
I
movement of vascular tissues It has thin walls in size and some have nuclei.
.
, vary
:
Collenchyma form of parenchyma with thicker cell walls with cellulose thickening providing ,
extra support found around
,
the outside of
stem ,
below epidermis and midrib of leaves
Endodermis
·
:
layer of cells Surrounding the vascular tissue of plants
/Sevenchymal / Xylem
·
Vascular bundles in stems have a
cap of fibres walls contain lignin for extra
strength
,High powered detailed diagrams
The transport of water
Water always moves from a
region of
high to low water potential .
Transpiration energy
·
:
of the Sun causes water to evaporate from the leaves .
↳ This reduces water
the water potential in the leaves and sets up a potential gradient throughout the plant .
Water down this from
moves gradient the Soil
through the plant.
Transpiration
Mesophyll
·
cells have air Spaces around them the cell walls are wet and some of this water evaporates into air spaces.
many ,
·
The air inside the leaf has direct contact with the air outside the leaf
through small pores called Stomata .
Xerophytes
-
plants that live in areas where water
supply is low .
Adaptations
·
Thick
-
water proof cuticle cutin
,
containing
-
Stomata found on upper epidermis or sunken
Hairs trap reducing gradient
layer of Moist air close to surface , steepness of
Leaves reduced to spines to lessen Surface area and protect the plant from
being eaten
-
Swollen ,
Succulent stems that store water and photosynthesis
Transport in plants
The
·
Such as mineral ions and dissolve
organic compounds
substances transported water to form Solutions and these solutions moved
, ,
in are
through
specialised tubes .
·
These tubes form a
system called the vascular system .
Vascular Systems :
·
and Phloem (Vascular tissues)
contain 2 tissues Xylem .
fluid is called Sap
Xylem
·
direction , roots
Sap moves in tubes called Xylem Vessels ,
carrying mainly water/inorganizions in one to rest of the plant) .
Phloem many directions (from leaves/storage organs plant) .
·
tubes called Sieve tubes ,
carrying products of
photosynthesis rest of
in in to
sap moves
, ,
Structure of stem roots
,
and leaves and distribution of Xylem/phloem
Stem
·
roots and leaves the main involved in transport plants.
,
are
organs in
Dicotyledons
·
-
leaves with wide blades (laminal and narrow Stalks (petioles) .
2 cotyledons in the
embryo .
Low power plant diagrams
Phloem
·
is stained and has small cells .
Xylem is stained red and contains larger vessels .
green
In
·
stems and leaves and phloem found in vascular bundles in found at the center .
xylem are
,
roots
they are
Epidermis
·
is one cell thick and covers the outside of the plant.
·
Outer region of stems and roots is called cortex and is
mainly made of parenchyma .
Parenchyma
:
·
basic plant used tissue which is active and has functions such food storage and roles
cells tissue as
packing metabolically as , Support in
I
movement of vascular tissues It has thin walls in size and some have nuclei.
.
, vary
:
Collenchyma form of parenchyma with thicker cell walls with cellulose thickening providing ,
extra support found around
,
the outside of
stem ,
below epidermis and midrib of leaves
Endodermis
·
:
layer of cells Surrounding the vascular tissue of plants
/Sevenchymal / Xylem
·
Vascular bundles in stems have a
cap of fibres walls contain lignin for extra
strength
,High powered detailed diagrams
The transport of water
Water always moves from a
region of
high to low water potential .
Transpiration energy
·
:
of the Sun causes water to evaporate from the leaves .
↳ This reduces water
the water potential in the leaves and sets up a potential gradient throughout the plant .
Water down this from
moves gradient the Soil
through the plant.
Transpiration
Mesophyll
·
cells have air Spaces around them the cell walls are wet and some of this water evaporates into air spaces.
many ,
·
The air inside the leaf has direct contact with the air outside the leaf
through small pores called Stomata .
Xerophytes
-
plants that live in areas where water
supply is low .
Adaptations
·
Thick
-
water proof cuticle cutin
,
containing
-
Stomata found on upper epidermis or sunken
Hairs trap reducing gradient
layer of Moist air close to surface , steepness of
Leaves reduced to spines to lessen Surface area and protect the plant from
being eaten
-
Swollen ,
Succulent stems that store water and photosynthesis
