allery**Auxins** were first isolated from:
AColeoptile tips of oat (Avena sativa)
BPea seeds
CCoconut milk
DRice husk
Answer & Solution
Correct answer: A. Coleoptile tips of oat (Avena sativa)
F.W. Went (1928) isolated auxin from oat (Avena) coleoptile tips.
Indole-3-acetic acid (IAA) is the most common natural auxin.
Promotes cell elongation, apical dominance, root initiation.
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