#Growth_substances and their functions #Hormones 1 Auxin : N | Agriculture Exams Library
#Growth_substances and their functions
#Hormones
1 Auxin :
Named by F.W. Went. It has apical bud dominance, inhibit
root elongation and promote cell division in tissue culture
a. IAA :
Prevent premature fruit drop
b. IBA.
Root formation
c. NAA.
Fruit thinner, prevent fruit drop
2) 2,4-D :
Fruit setting harmone (< 20 ppm), and also used as herbicide 20 ppm)
3 Cytokinin :
Dormancy breaker, stimulate cell division
4 Gibberellins :
Cell elongation, increase fruit size
5. Abscisic acid (ABA) :
Induce Dormancy, stomata closer, also called as anti-gibberellin
6 Ethylene :
Ripening of fruits, Isodiametric growth of stem & roots
7 Chlormequat (CCC) :
Logging preventor, also known as cycocel
8. Maleic hydrazide
Growth retardant, prevent onion sprouting in storage, sold
under trade name Sprout stop
9 Ethephone :
T.Name-Ethrel, Used as Banana fruit ripener
10 Glyphosate :
Used as sugarcane ripener
