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Plant Growth and Development — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYPlant Growth and Development2 Marks
Question
Which plant hormone can transform genetically dwarf plants into tall plants? State the mechanism involved with suitable example.
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Answer

Cabbage and sugarbeet plants have rosette habit of leaves. The leaves in these plants are condensed because of shortening of internodal area of the stem. It is a genetic character. when we spray $GA _3$ solution on these plants, these became abnormally tall. It happens because of increase in internodal area. Thus, such genetically dwarf plant is made tall by $GA _3$.

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