Recognition of ethylene as a natural plant hormone was done by

Pratt-Goeschi

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Richmond-Lang

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Darwin

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Haberlandt

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Solution

The correct option is B Pratt-Goeschi
Ethylene is highly volatile substance. Most fruits, flowers, leaves of certain plants and fungi produce a small amount of ethylene. The recognition of ethylene produced from these plants was done by Pratt and Goeschl in 1969.
The delay of senescence of leaves and other organs of the plants by cytokinins is called as Richmond-Lang effect. It was discovered by Richmond and Lang in 1967.
Thus, the correct answer is 'Pratt and Goeschl'

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