Chapter 2: Control and Coordination

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Control and Coordination


How does chemical coordination occur in plants?


Chemical coordination in plants is caused by the help of the plant hormone, also called phytohormone. Plant hormones are the chemical that helps to coordinates the growth, development, and responses to the environment.  Main plant hormones are:

Auxin – It help is the cell growth at the shoot tips and involved in phototropism. They are synthesized in the shoot tips.

Gibberellins – It helps in the growth of the stem.

Cytokinins – They promote cell division in the plant. They are present in the area where rapid cell division occurs like in fruits and seeds.

Abscisic Acid – This hormone inhibits the growth of the plant. The falling of leaves, flowers, and fruits is promoted by this hormone. 

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