Summary
Summary All Of Year One Plants
The documents contains information about transpiration, translocation, the different types of plants and their adaptations. It contains pictures alongside to make it easier to visualise.
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Asi.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 →
,
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