Question

Which GA was first gibberellin to be discovered?

• A. $G{A}_1$
• B. $G{A}_2$
• C. $G{A}_3$
• D. $G{A}_4$

Answer 1

The correct option is A $G{A}_1$

• Gibberellins or gibberellic acids are plant hormones which help in stem elongation, breaking dormancy, germination, flowering, development of flower and senescence leaf and fruit.
• These are the longest-known classes of plant hormone.
• About 126 GAs have been identified from plants, fungi, and bacteria.
  
• The gibberellins are named based on GAn in order of discovery.
• The first gibberellic acid to be structurally characterized was GA${}_3$ and the first one to be discovered was GA${}_1$.
  
• So, the correct answer is 'GA1'.