Gibberellin
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1. Plant hormone that influences cell elongation, photoperiod (photoperiodism) response, and chilling tolerance.
1. Shows a plant lacking gibberellins and has an internode length of "0" as well as it is a dwarf plant. 2. Shows your average plant with a moderate amount of gibberellins and an average internode length. 3.Shows a plant with a large amount of gibberellins and so has a much longer internode length because gibberellins promotes cell division in the stem.