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Avena curvature test is a bioassay for e...

Avena curvature test is a bioassay for examining the activity of

A

auxins

B

gibberellins

C

cytokinins

D

ethylene

Text Solution

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The correct Answer is:
a
Bioassay s a testing of biological activity like growth Avean curvture test is a bioassay for examining the activity of auxins. It I baswed upon experiments of Went `10^(@)` curvature is produce by auxin concentration of `150 mum` lit at `25^(@)C and 90%` relative humidity. It can measure size agar block. `15-30` mm log oat coleptile grown in dark is held vertically over water. 1 mm tip of colecootile is removed without injuring the primary leaf. After 3 hrs a seccond decapitation is carried outfor 4 mm distance. Primary leaf is now pulled losse and agar block supported against it at the tio of decapitated coleoptile After 90-110 mm the coleptile is found to hae betm the vruvature is measured
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