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Q.

What are phytohormones?

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Detailed Solution

Phytohormones are natural chemical substances produced by plants that control and regulate their growth and development.

Phytohormones, also known as plant hormones, are produced in small quantities in one part of the plant and transported to other parts where they influence growth. They help in seed germination, flowering, fruit ripening, and leaf fall.

Types of Phytohormones

HormoneMain Function
AuxinsPromote cell elongation and root growth
GibberellinsStimulate stem growth and seed germination
CytokininsHelp in cell division and delay aging
Abscisic Acid (ABA)Induces dormancy and closes stomata
EthylenePromotes fruit ripening

Importance

  • Control plant height and shape
  • Regulate flowering and fruiting
  • Help plants adapt to stress conditions
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