Write the names and functions of four plant hormones.

1.	Write the names and functions of four plant hormones.
Answer» Plant Hormones : Are the growth regulators and important chemicals affecting growth of the plant. –The growth regulators consists of :- Four plant hormones are : - 1. Auxin : Function : 1. Cell elongation and enlargement. 2. Apical dominance : The presence of terminal or apical bud results in the failure of lateral bud growth. 3. Parthenocarpy : Natural or artificial induced production of fruit without fertilization of ovule. 2. Gibberellins : Function : 1. Cell Elongation. 2. Stem elongation : Induce stem elongation in genetically dwarf variety, called as Bolting effect. 3. Cytokinins : Function : 1. Cell division. 2. Secondary growth : Cytokinins along with auxin promote secondary growth in plants that is increase thickness. 4. Ethylene : Gaseous plant hormones . –Autocatalytic in nature. Function : 1. Fruit Ripening. 2. Accelerates the abscission of leaves and flowers.

Answer»

Plant Hormones : Are the growth regulators and important chemicals affecting growth of the plant.

–The growth regulators consists of :-

Four plant hormones are : -

1. Auxin :

Function :

1. Cell elongation and enlargement.

2. Apical dominance : The presence of terminal or apical bud results in the failure of lateral bud growth.

3. Parthenocarpy : Natural or artificial induced production of fruit without fertilization of ovule.

2. Gibberellins :

Function :

1. Cell Elongation.

2. Stem elongation : Induce stem elongation in genetically dwarf variety, called as Bolting effect.

3. Cytokinins :

Function :

1. Cell division.

2. Secondary growth : Cytokinins along with auxin promote secondary growth in plants that is increase thickness.

4. Ethylene :

Gaseous plant hormones .

–Autocatalytic in nature.

Function :

1. Fruit Ripening.

2. Accelerates the abscission of leaves and flowers.

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