A) Gibberellin
B) IAA
C) ABA
D) Zeatin
Correct Answer: A
Solution :
| [A] Gibberellins overcome the natural dormancy of buds, seeds, tubers etc. In this way, these are antagonistic to ABA. IAA (Indole Acetic Acid) is the principal naturally occurring auxin, found in all plants including fungi. It helps in eradication of weeds, root initiation and production of parthenocarpic fruits. ABA (Abscisic Acid) is the natural growth inhibitors. Zeatin is a naturally occurring cytokinin that stimulates mature plant cells to divide when added to a culture medium along with an auxin. |
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