Question

Explain Auxins
Gibberellins
Cytokinins
Abscisic acid
Ethylene
from chapter PLANT GROWTH AND DEVELOPMENT..

Plz fast...

Answer 1

Hii frnd..
Auxins - Auxins promote cell division and cell differentiation.It is present on the tip of the stem.it promotes plant growth.
Gibberellins- They also promote cell differentiation and cell enlargement in the presence of auxins.They help in breaking dormancy of seeds and buds.
Cytokinins- They help in opening of stomata
They help in delay in ageing of leaves.
Abscisic acid - It is a which prevents the growth of plant.It helps in promoting dormancy.
Ethylene - It helps in horizontal growth of stems with respect to gravity.

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Answer 2

Auxins -> Cell enlargement
Root formation
Respiration
It helps in apical dominance

Gibberellins -> Cell enlargement
Cell differentiation
It help in breaking of dormancy
It promote fruit growth

Cytokinins -> Promote cell division
Breaking of dormancy in seeds and buds
Delay ageing in leaves
Promote opening of stomata

Abscisic acid -> Promote dormancy in seeds
and buds
Promote closing of stomata
Promote falling and wilting of leaves , flowers and fruits

Ethylene-> It promote abscission of leaves and flpeers
Breaks dormancy
It also essential for ripening of fleshy food .

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