The physiologically active form of phytochrom | vedclass

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Question

(B) Phytochrome exists in two interconvertible forms: $P_r$ (phytochrome red) and $P_{fr}$ (phytochrome far-red).$P_r$ absorbs red light at $660 \ nm$

Vedclass · Accepted Answer

$P_{730}$

Vedclass · Answer

(B) Phytochrome exists in two interconvertible forms: $P_r$ (phytochrome red) and $P_{fr}$ (phytochrome far-red).$P_r$ absorbs red light at $660 \ nm$ and is converted into $P_{fr}$.$P_{fr}$ absorbs far-red light at $730 \ nm$ and is the physiologically active form that triggers various plant responses such as flowering,seed germination,and leaf expansion.Therefore,the active form is $P_{730}$ (also known as $P_{fr}$).

Column $I$	Column $II$
$a.$ Auxin	$(i)$ Root hair formation
$b.$ Cytokinin	$(ii)$ Seed development
$c.$ Ethylene	$(iii)$ Xylem differentiation
$d.$ $ABA$	$(iv)$ Nutrient mobilisation

Column-$I$	Column-$II$
$A$. Abscisic acid	$(i)$ Adenine derivative
$B$. Gibberellins	$(ii)$ Indole acetic acid
$C$. Kinetin	$(iii)$ Carotenoid derivative
$D$. Auxin	$(iv)$ Terpenes

The physiologically active form of phytochrome is:

Similar Questions

Match the following:

Column $I$ Column $II$

$a.$ Auxin $(i)$ Root hair formation

$b.$ Cytokinin $(ii)$ Seed development

$c.$ Ethylene $(iii)$ Xylem differentiation

$d.$ $ABA$ $(iv)$ Nutrient mobilisation

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Leaves fall off from branches in winter due to

Which one of the following pairs of plant hormones inhibits flowering in some plants?

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