Phytohormone

Regulation of plant growth and development by phytohormone

A) Germination :

-Gibberellin :

1. Break seed dormancy

B) Growth :

-Auxin :

1. Promote cell elongation in region of elongation
2. Promote cell division in vascular cambrium
3. Regulate phototropism and geotropism

-gibberellin :

1. Promote stem elongation

C) Fruit development :

-Auxin :

1. Stimulate fruit development even without fertilization

-Gibberellin :

1. Stimulate fruit development even without fertilization