Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
The hormone that induces apical dominance and the hormone that acts as an antagonist to this process is
BiologyPlant - Growth and DevelopmentNEET
Options:
  • A IAA and ethylene
  • B NAA and Zeatin
  • C IBA and NAA
  • D Kinetin and BAP
Solution:
1377 Upvotes Verified Answer
The correct answer is: NAA and Zeatin
In most higher plants, the growing apical bud inhibits growth of the lateral buds, a phenomenon called apical dominance and is induced by auxins like NAA, 2,4 D, IAA etc. Removal of shoot tips (decapitation) or addition of cytokinins like zeatin, kinetic etc., usually results in the growth of lateral buds. It is widely applied in tea plantation, hedge making. Cytokinin helps to overcome apical dominance.

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.