Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days
For Business Enquiry


Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number


Mon to Sat - 11 AM to 8 PM


Asked by narinder 15th March 2010, 1:14 PM
Answered by Expert

Plant hormones (also known as plant growth regulators (PGRs) and phytohormones) are chemicals that regulate plant growth. Plant hormones are signal molecules produced at specific locations in the plant, and occur in extremely low concentrations. The hormones cause altered processes in target cells locally and at other locations.

Auxins are phytohormones, which help to coordinate growth and development in the plant body. Auxin stimulates cell elongation. Together with cytokinins, auxins stimulate cell division. Auxins shoot apical dominanace.They  are responsible for causing phototropism, geotropism and hydrotropism.

Auxins and gibberellins help in growth of the stem and roots in appropriate concentrations. Gibberellins are plant growth hormones inflencing a range of developmental processes in higher plants.

Cytokinins promote cell division and hence they are present in larger amounts in areas of rapid cell division, such as in fruits and seeds.

Abscisic acid inhibits growth and causes wilting of leaves.

Ethylene helps in ripening of fruits.

Answered by Expert 15th March 2010, 4:08 PM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Your answer has been posted successfully!

Chat with us on WhatsApp