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Plant Growth Regulators
Question

Auxins were isolated from the coleoptiles of Oats by 

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Solution

F.W. Went isolated auxins from Oat coleoptiles. Charles Darwin discovered phototorpic response in canary grass coleoptiles when subjected to unilateral light. Kurosawa discovered that bakanae disease in rice is due to some substance known later as Gibberellin secreted by the fungus Gibberella fujikuroi. Skoog discovered the formation of callus from internodal cells of tobacco when treated with auxins and extracts of vascular tissues or yeast extract or coconut milk or DNA. 

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