QUICK REVISION OF PLANT HORMONES

PLANT GROWTH HORMONES
GROWTH PROMOTERS GROWTH INHIBITOR DUAL




i IM
AUXIN GIBBERILIN CYTOKININ ABSCISSIACID ETHYLENE



D Chemical Nature >
-

Indole compound >
-

Terpenes >
- Purine Derivative
CAdenine)
>
-
Carotenoid >
-
Gaseous
Derivative Hormone


Acetyl Col
2) Precursor
> E Violaxanthin Methionine
Tryptophan T-RNA
-


>
-
> >
-


>
-

-



Mevalonic Acid CXanthophyu)


3) Discovery >
-

Charles Darwin >
-
"Kurosawa
-
> Skoog 3
Cin rice plant
Francis Crick
-




4) Isolation > FW
-

. Went
in
.




Avina Sativa
>
-

Yabuta E
Samuki from the
=> Miller et al
Herring Fish Cderivative
o KITENin
of purine E
pyrimidine)
COATS)
Fungi-Gibberella Talintst Naturally occuring Cytoin
s


Fujikori
5) Physiological ① Apical dominance
-

promotes bud
growth of apical ① Internodal ① Cell division
(Along Auxin)w QPromotes Senesense
·
① Promotes Senesense
②
elongation "Abscission
-
Inhibits Sunillary bed


role ② Promotes Lateral
Fruit
② Promotes ② Seed Germination Dominance
Counteracts
③
ripening

Breake domancy
the ③
apical dominance)
Abscission Antiaging hormone elongation - submerged aquality a
Partialeged
e



of old parts
Delays Senesense
-




③Bolling in Rosette
③ Cell Division Climateric EffectDuringripeninasg
Along plants
cytokinin
④ Stress Hormoormancy ⑤ Root hair formation
-



w



⑨ Cell Elonation ⑥ Flowering in Mango E

& ⑤ H20l > Stomata
-
pineapple
⑤ Xylem differentiation Close ⑦ Breaks dormancy in
Ground nut

⑥ Delays Senesense ⑤ Anti transpiration ⑤ Feminising effect in

Cucumber
① Juvenile Conifers (Pinus)
6) CommercialD Tissue
eg
NAA IBA
Culture
frooting
② Increase in
Sugarcane
& Increase shelf ① ETEPHONE-Artificial
stationof
life of
Cut ethylene
yield
↳
,
>
-
20 tonn per hectar

Role ② Parthenocarpy
Induce ③ ↑ Malting Fruits
& Delayed Ripening Vega RIPENING

③ Flowering pineapple in
Litchi ⑤ Es
Shape of flowers & explant ②
Thinning of Fruit in
Fruits cyt Auxin > Callus
⑨
-
=




Weedicide 2, 4-D ⑥ of Cherry & Coconut
length Cyt)Auxin > Shoot
-


↑ grape
-




Charrow Spectrum) Stem Cyt(Auxin > Root -




② Masculine effect grow
⑤ Agent Orange in Cucumber
③
2
, UD + 2, 4 , 6-T + defdiation ⑧ Induces
LDP under
flowering Feminising Effect
in SD

Conditions

7) Avena Curvature
Bioessay test
by FW
. Went
2- Amylase Cotton/Bean Triple Response
Explant test /Ethylene
Barley G
.




Endosperm
Ded
Y
test is
stem

growth