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Q.
The phytohormone, which induces triple response growth is
J & K CETJ & K CET 2008
Solution:
It was a Russian physiologist named Dimitry N Neljubow ( 1876-1926), who first established that ethylene affects plant growth. He identified ethylene in illuminating gas and showed that it causes a triple response on pea seedlings-inhibited stem elongation, increased stem thickening and a horizontal growth habit.