The vascular tissue for the transport of water and nutrients in the plant is called the xylem. The xylem forms a continuous network of channels that connects roots to the leaves through the stem and branches and thus transports water to the entire plant .

1. TRANSPORTATION IN
PLANT
PRESENTED BY…
FIZZA MEHWISH
Department of Biotechnology
University of Science & Technology, Bannu

2. INTRODUCTION
 The vascular tissue for the transport of water and nutrients in the plant is
called the xylem.
 The xylem forms a continuous network of channels that connects roots to
the leaves through the stem and branches and thus transports water to the
entire plant .

5. Means of Transportation
Diffusion
Facilitated Diffusion
Passive Symports and
Antiports
Active Transport

6. Diffusion
 Diffusion is the net Movement of molecules (or ions) from the region of their
higher concentration to a region of their lower concentration.
 Diffusion is a passive process which mean no energy is used to molecules
move, they have a natural kinetic energy .
 Transport across Phospholipid bilayer Over small distance I.e, between
Adjacent cells ,it take place by diffusion.
Diffusion

7. Movement of water in the roots

8. Facilitated Diffusion
 Facilitated diffusion is the transport of substances across a biological
membrane from an area of higher concentration to an area of lower
concentration with the help of transmembrane integral proteins.
 Being passive, facilitated transport does not directly require
chemical energy from ATP .
Facilitated Diffusion

9. Passive Symports and Antiports

10.  Active Transport is defined as a process that involves the
movement of molecules from a region of lower
concentration to a region of higher concentration
against a gradient or an obstacle with the use of external
energy in the form of ATP.
Active Transport

11. Movement of water in the stems
Adhesion, which is molecular
attraction between “unlike”
molecules. In the case of
xylem, adhesion occurs
between water molecules and
the molecules of the xylem
cell wall
Cohesion, which is
molecular attraction
between “like” molecules.
In water, cohesion occurs
due to hydrogen bonding
between water molecules.

12.  The water moves into the mesophyll cells from the top of the xylem vessels.
Then the water evaporates out of the cells into the spaces between the cells
in the leaf. After this, the water leaves the leaf (and the whole plant) by
diffusion through stomata.
 Transpiration is the loss of water from the plant through evaporation at the
leaf surface. It is the main driver of water movement in the xylem.
Movement of water in the leaf

13. Transpiration pull
The flow of
water upward
through the
xylem in plant.
The attractive
force between
two Unlike
materials is
known as
adhesion.
The attractive force
between the
molecules of a
particular liquid is
known as cohesion
This water loss
through
evaporation is
called
transpiration
Most of water is
lost through the
stomata in
leaves.
Tension develops
by cohesion
force and
transpiration is
called
transpiration
pull.

14. Overview....