As
i.i.i.in
÷÷÷÷÷÷ii÷i÷÷÷i÷÷i
Need For
plant transport systems
absorbed .
Size need substances
some
grow big so
they transport systems to more
ratio =>
SA : v01 leaves have a
large one j stems , trunks ,
roots have a small one .
In
dicotyledons
Dicots seeds that contain cotyledons ( organs ) that act food stores for and form when seed
embroyo
make two as leaves
germinates .
""
"
"" "" " "" " " " " " "" "" " ""
Woody dictots → hard , lignified tissue
, long life dicotylydon (2)
Have vascular
system
:
phloem + Soft tissue
xglem
-
↳ bundles
arranged in vascular
STEM
vascular bundles are around
edge to
① $"
§
"
Epidermis
1 Phloem
and support
D '
give strength
① Parenchyma
①
µ, cortex
, §?
Root
70
" hair
In the middle to help withstand tugging Exodermis
Phloem
trains when leaves blown in wind
a >
Epidermis
✗
glenn 0 0
cortex
✓ y
y
LEAF
palisade mesophyll
The midrib is main vein vascular
carrying
-
" "" " """ " "" °" """ " " "
""
T " "" =
✓ glenn
✗
spread out for transport and support m ,.gr , , pngoem
Structure +
Function of ✗
glem
→ mineral
.
Large non -
living
tissue transports 1-120
+ ions and supports
- Made up of dead cells
several
.
Long hollow structure made
by columns of
fusing together
Transport
only up
-
other two tissues : thick walled parenchyma packs
↳ store food ( contain tannin )
from herbivores
↳ bitter chemical that protects plants
, astrigent tasting
,✗
glenn fibres
long cells with
lignified secondary walls that provide extra mechanical
strength but do not transport
-
water .
Lignin can be laid down :
rings , spirals
solid tubes with small
unlignifiecl areas called bordered pits
↳ water and of
leaves
xylem moves into other cell plant
xglem parenchyma
00 non lignified pit lignified cell wall
§
""" " " "" " "
"
vessel
lumen xylem
hollow tube
00 0 end cell wall lost
G)
"" " " " " "
"
around lumen
running
reinforces so dont collapse
under transpiration CI pull
, Structure of phloem
•
Living tissue that transports food as
organic solutes around from leaves
Supplies with and acid for cellular 1-
cells
sugar amino resp synthesis
•
.
can 1- down
-
go up
Main
transporting vessel → sieve tube elements
phloem sieve tubes made up of cells to form hollow structures
many
•
lignified.in
-
not
areas between cells walls become perforated to form sieve plates which look like sieves and let phloem contents
,
flow
through
break
•
Large pores appear , tonoplast ,
nucleus ,
other
organelles down
• Phloem becomes tube filled with phloem sap and mature phloem cells have no nucleus
•
Closely linked →
companion cells which form them
cells linked to sieve tube elements
by plasmodesmata microscopic channels
through cellulose cell walls
linking
-
.
of adjacent
cytoplasm cells
Maintain nucleus
. +
organelles
•
Companion cells = active → function as life support system
Phloem Fibres sclereicls cells thick cell walls
tissue contains
supporting with
tissue →
,
i.i.i.in
÷÷÷÷÷÷ii÷i÷÷÷i÷÷i
Need For
plant transport systems
absorbed .
Size need substances
some
grow big so
they transport systems to more
ratio =>
SA : v01 leaves have a
large one j stems , trunks ,
roots have a small one .
In
dicotyledons
Dicots seeds that contain cotyledons ( organs ) that act food stores for and form when seed
embroyo
make two as leaves
germinates .
""
"
"" "" " "" " " " " " "" "" " ""
Woody dictots → hard , lignified tissue
, long life dicotylydon (2)
Have vascular
system
:
phloem + Soft tissue
xglem
-
↳ bundles
arranged in vascular
STEM
vascular bundles are around
edge to
① $"
§
"
Epidermis
1 Phloem
and support
D '
give strength
① Parenchyma
①
µ, cortex
, §?
Root
70
" hair
In the middle to help withstand tugging Exodermis
Phloem
trains when leaves blown in wind
a >
Epidermis
✗
glenn 0 0
cortex
✓ y
y
LEAF
palisade mesophyll
The midrib is main vein vascular
carrying
-
" "" " """ " "" °" """ " " "
""
T " "" =
✓ glenn
✗
spread out for transport and support m ,.gr , , pngoem
Structure +
Function of ✗
glem
→ mineral
.
Large non -
living
tissue transports 1-120
+ ions and supports
- Made up of dead cells
several
.
Long hollow structure made
by columns of
fusing together
Transport
only up
-
other two tissues : thick walled parenchyma packs
↳ store food ( contain tannin )
from herbivores
↳ bitter chemical that protects plants
, astrigent tasting
,✗
glenn fibres
long cells with
lignified secondary walls that provide extra mechanical
strength but do not transport
-
water .
Lignin can be laid down :
rings , spirals
solid tubes with small
unlignifiecl areas called bordered pits
↳ water and of
leaves
xylem moves into other cell plant
xglem parenchyma
00 non lignified pit lignified cell wall
§
""" " " "" " "
"
vessel
lumen xylem
hollow tube
00 0 end cell wall lost
G)
"" " " " " "
"
around lumen
running
reinforces so dont collapse
under transpiration CI pull
, Structure of phloem
•
Living tissue that transports food as
organic solutes around from leaves
Supplies with and acid for cellular 1-
cells
sugar amino resp synthesis
•
.
can 1- down
-
go up
Main
transporting vessel → sieve tube elements
phloem sieve tubes made up of cells to form hollow structures
many
•
lignified.in
-
not
areas between cells walls become perforated to form sieve plates which look like sieves and let phloem contents
,
flow
through
break
•
Large pores appear , tonoplast ,
nucleus ,
other
organelles down
• Phloem becomes tube filled with phloem sap and mature phloem cells have no nucleus
•
Closely linked →
companion cells which form them
cells linked to sieve tube elements
by plasmodesmata microscopic channels
through cellulose cell walls
linking
-
.
of adjacent
cytoplasm cells
Maintain nucleus
. +
organelles
•
Companion cells = active → function as life support system
Phloem Fibres sclereicls cells thick cell walls
tissue contains
supporting with
tissue →
,
