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(B) The discovery of the first plant growth hormone originated from the experiments conducted by $Charles$ $Darwin$ and his son $Francis$ $Darwin$. Th

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Boysen-Jensen and Darwin

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(B) The discovery of the first plant growth hormone originated from the experiments conducted by $Charles$ $Darwin$ and his son $Francis$ $Darwin$. They observed that the coleoptile of canary grass ($Phalaris$ $canariensis$) exhibited phototropism (bending towards light) only when the tip was exposed to unilateral light.Later, $Peter$ $Boysen-Jensen$ demonstrated that this signal was a chemical substance that could diffuse through a gelatin block, which was eventually identified as $Auxin$.

List-$I$	List-$II$
$A$. Auxin	$I$. Miller et al.
$B$. Gibberellins	$II$. $H$.$H$. Cousins
$C$. Ethylene	$III$. $E$. Kurosawa
$D$. Cytokinin	$IV$. Charles Darwin and Francis Darwin

Classical experiments on growth were performed by

Similar Questions

Match List-$I$ with List-$II$:

List-$I$ List-$II$

$A$. Auxin $I$. Miller et al.

$B$. Gibberellins $II$. $H$.$H$. Cousins

$C$. Ethylene $III$. $E$. Kurosawa

$D$. Cytokinin $IV$. Charles Darwin and Francis Darwin

Choose the correct answer:

What are phytohormones?

Choose the incorrect statement.

Plant growth regulators $(PGR)$ or plant hormones are generally

Phytohormones are:

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