Question

Which of the following statements regarding gibberellins is incorrect?

• A. $G{A}_3$ was one of the first gibberellins to be discovered
• B. All GA are acidic
• C. They increase the length of plant axis as in grapes, sugarcanes etc
• D. They promote senescence

Answer 1

The correct option is D They promote senescence

• Gibberellins are weakly acidic growth hormones having gibbane ring structure which cause cell elongation of intact plants in general and increased the internodal length of genetically dwarfed plants (e.g., pea, corn), in particular.
  
• $G{A}_3$ was one of the first gibberellins to be discovered and remains the most intensively studied form.
  
• The major sites of gibberellin production in plants we embryos, roots and young leaves near the shoot tip.
  

So the correct answer is 'They promote senescence'.