One of the commonly used plant growth hormone in tea plantations is

One of the commonly used plant growth hormone in tea plantations is
  1. ethylene
  2. abscissic acid
  3. zeatin
  4. indole-3-acetic acid

Solution

Tea plants are grown by stem cuttings. If we dip the lower cut end of a cutting in dilute solution of auxins (IAA, IBA, etc), very soon large number of roots are developed on the cut ends, due to which these cutting develop into successful plants.

Asked in: NEET 2010 (Mains)

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