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Plant Growth and Development
Question
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Auxin can be bioassayed by

  • Avena coleoptile curvature

  • Hydroponics

  • Potometer

  • Lettuce hypocotyl elongation

Answer

A.

Avena coleoptile curvature

Auxin is a phytohormone that is often bioassayed by Avena coleoptile curvature test. The angle of curvature of a decapitated oat coleoptile is measured after placing an agar block containing auxin on one side. The ability of auxin to stimulate shoot growth is then measured.

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