Allilopathic effect caused by different plant .To know about them and their advantage & disadvantage are given hare

1. WELCOME

2. ALLELOPATHY OF PLANT
TOPIC :-
Prepared by -: Sumantra Chakraborty
. 4th sem
Midnapore college
(Autonomous)

3. WHAT IS ALLELOPATHY ?
Allelopathy is a biological
phenomenon by which an organism
produces one or more biochemicals
that influence the germination, growth,
survival, and reproduction of other
organisms. ...

5. Allelopathic potential as the
potential of a plant to impair
neighbors' growth due to the
release of allelochemicals, which
can be assessed with a bioassay
using plant leachates or plant
extract
WHAT IS ALLELOPATHIC POTENTIAL ?

6. • secondary metabolites produced by plants
(donors) when released into the environment,
play a key role in ecology, physiology and
growth of other plants (recipients) in their
vicinity .,
• Allelopathic chemicals can be present in any part of the
plant. They can be found in leaves, flowers, roots, fruits,
or stems. They can also be found in the surrounding soil.
CAUSE OF ALLELOPATHY:

7. • Phenolic acid –p-hydroxybenzoic
• Acid
• Coumarin-Herniarin
• Terpinoids-sesquiterpenes
• Flavinoids-Naringenin
ALLELOPATHIC CHEMICAL

8.  True Allelopathy:- The true ALLELOPATHY is the
release of substance that are toxic in form in
which they are produced in the plant.
 Function Allelopathy:- Function Allelopathy is
the release of the substance that are toxic or
abresuot of transformation by micro-organism
Types of Allelopathy

13. Allelopathic plants create an unfavorable
condition for the neighboring plants by reducing
the seed growth and germination of seeds as they
release allelochemicals which is not suitable for
the growing of other plant.
Parthenium is well known allelopathic plant. It secrets
sesquiterpene lactone parthenin chemical that inhibits the
grow of other plant surrounding it.
PARTHENIUM AS A ALLELOPATHIC PLANT

16. CONCLUSION
So, Allelopathy is a phenomenon that not only
have harmful effect but also beneficial effect
in crops production.Several kinds of
Allelopathic chemicals reduce the competition
between two plant and remove one of
them.Cultivation of these plant may reduce
the growth of other herb and shrub in crop
field.

17. • ALLELOCHEMICALS : ROLE IN
PLANT-ENVIRONMENT
INTERACTIONS
• Allelopathy in
agroecosystems by R K Kohli,
HP singh
• WWW.WIKIPEDIA .COM
REFERENCE