Question

Name various plant harmony alos give their physiological effects on plants growth and development

Answer 1

auxin

1. they promote growth of cells root formation and fruit growth
2. they mediate plant movement

gibberellins

1. they stimulate cell elongation
2. they oppose the effect of A B A

cytokinins

1. they promote cell division
2. they help in breaking dormancy of seed
3. they delay ageing

abscisic acid

1. it inhibits growth
2. it promotes leaf wilting
3. causes closure of stomata

ethylene

1. it helps in ripening of fruit