Plant Growth Regulators

            Plant growth regulators are organic chemicals that are produced internally in plants, or artificial substances that are used in plants from outside, which change the growth and modification of plants. Growth substances start those live chemical reactions that make it possible to grow roots, stems and flowers. “The plant growth regulator play essential role in increasing the quality and production of the crop.”

Five major plant growth regulators and their uses :-

Uses	Plant Growth Regulators
Rooting	Auxins, Cytokinins, Gibberellins, Ethylene
Growth	Auxins, Cytokinins, Gibberellins, Abscisic acid, Ethylene
Flower initiation	Auxins, Cytokinins, Gibberellins, Abscisic acid, Ethylene
Fruit set	Auxins, Cytokinins, Gibberellins, Ethylene
Fruit growth	Auxins, Cytokinins, Gibberellins, Abscisic acid, Ethylene
Fruit ripening	Auxins, Cytokinins, Gibberellins, Ethylene
Abscission	Auxins, Cytokinins, Gibberellins, Abscisic acid, Ethylene
Senescence	Auxins, Cytokinins, Gibberellins, Abscisic acid, Ethylene

Plant Growth Regulators and their Uses

Name	Chemical Name	Trade Name	Uses
ABA	Abscisic acid	Abscisin / Rooting	Defoliant
Acifluorfen	5-[2-Chloro-4-(Trifluoromethyl)Phenoxy]-2-Nitrobenzoic acid	Blazer	Reduce growth
Chloroquat	2-Chloroethyl-Trimethyl ammonium chloride	Cycocel	Lodging preventor
4-CPA	2-(3-Chlorophenoxy)-Propionic acid	Fruitone	Fruit thinner (Reducing the number of fruits)
Diaminozide	Succinic acid-2, 2dimethyl hydrazine	Alar	Growth retardant
2, 4-D	(2, 4-Dichlorophyenoxy) Acetic acid	Plantagard	Herbicide
Ethephone	2-Chloroethyl phosphonic acid	Cepha	Sugarcane ripener
Glyphosate	N-Phosphonomethyl glycine	Round-up	Sugarcane ripener
GA-3	Gibberellic acid	Berelex / Pro-gibb	Grape enlarger, Seedless grape production
Kinetin	6-Furfuryl aminopurine		Dormancy breaker
IAA	Indol-3-acetic acid	Rhizopon-A	Plant cell enlarger
IBA	Indole-3-butyric acid	Seradix	Plant cell enlarger
Maleic hydrazide	1-2-dihydro-3, 6-pyidazinedione	Sprout stop	Growth retardant
Mapiquat chloride	N, N-Dimethyl piperidinium chloride	DPC	Growth retardant
NAA	NAA (1-Naphthyl acetic acid)	Fruit thinner	Fruitone-N (Fruit reducer)
TIBA	3, 3, 5-tri-iodobenzoic acid	Regim-8	Growth retardant

• Maikel :- It is used to shorten wheat plants.
• Ethylene :- It is used to ripening of fruits.