Hormones Of Plants :-
1) Auxins
2) Gibberellins
3) Cytokinins
4) Abscisic Acid
5) Ethylene
1) Auxins :- It Is A Greek Word Which Means "To Increase"
It Produced In The Apical Meristems Of Shoot And The Tips Of
Coleoptiles.
Auxins Controls The Lengthening Of The Shoot And The Coleoptile By
Promoting Cells Elongation
The Same Quantity Of Auxins That Promotes Growth In The Stem ,
Inhibits Growth In The Main Root System
2) Gibberellins :-
Gibberellins Were First Isolated From a Parasitic Fungus That Causes
abnormal Growth In Rice Seedling
It Causes Seed Germination In Grasses
It Can Break The Dormancy Of The Seed
It Promote Flowering
3) Cytokinins :- They Were First Discovered In Culture Of Plant Tissues. They Are Chemically Related To Nucleic Acid
They Promote The Growth Of Lateral Buds
They Prevent Senescence In Leaves By Stimulating Proteins Synthesis.
4) Abscisic Acid :-
Abscisic Acid Has Abscision Character And Acidic In Nature.
Abscisic Acid Causes Bud Dormancy And Seed Dormancy
Abscisic Acid Inhibits Active Growth Of Seedling Flowering In Long
Day Plants And Promotes Abscission
5) Ethylene :- It Is A Gaseous Hormone
It Inhibit Root Growth And Development Of Axillary Buds When Present
In High Concentration
Ethylene Also Stimulates Fruit Ripening
It Induces Senescence In Plant Cells And Organs
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