Question

What are phyto hormones? Explain the function of gibberellins hormone​

Answer 1

Answer:

Gibberellins play an important role in several developmental stages in plants, but their claim to fame is making stems longer. Gibberellins promote stem elongation between nodes on the stem. A node is a place on a stem where a leaf attaches, so gibberellins elongate the internodes.

Answer 2

$\Large{ \underline{ \boxed{ \bold{ \green{What \: are \: phytohormones?}}}}}$

✦The control and coordination in plants is controlled and performed by the plant hormones which is also known as Phytohormones.

✦The basic stages of a plant growth are cell division, cell enlargement and then cell differentiation. The plant hormones are also known as plant growth hormones.

✦ The growth regulators consist of auxins, giberralins, cytokinins, ethylene and abscisic acid.

✏ Growth hormones:

• Auxins
• Gibeberellins
• Cytokinnins

✏ Growth inhibitors:

• Ethylene
• Abscisic acid

These hormones also control the see dormancy, breaking of dormancy of seed, stomata control, fruit growth, falling of leaves, ageing of plants etc.

$\Large{ \underline{ \boxed{ \bold{ \green{Gibberellins}}}}}$

✏ It was first discovered in Japan by botanist Yabuta and kurosawa from extracts of rice plants which was infected by an fungal disease named Gibberella fujikaroi.

✦ Gibberellins are plant hormones promotes cell enlargement and cell differentiation in the presence of auxins.

✦ They help in breaking the dormancy of seeds and buds. They also promote growth in fruits.

✦ It is also involved in shoot extension or stem elongation. It is used in inducing elongation in dwarf varieties such as pea, maize etc. This is known as Bolting effect.

━━━━━━━━━━━━━━━━━━━━