Phytochrome a. is the only photoreceptor pigment in plants....

Phytochrome
$a$. is the only photoreceptor pigment in plants.
$b$. exists in two forms interconvertible by light.
$c .$ is a pigment that is colored red or far-red.
$d$. is a green-light receptor.
$e .$ is the photoreceptor for phototropism in coleoptiles.

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Key Concepts

Light Wavelength Sensitivity

Phytochrome's sensitivity to red and far-red wavelengths highlights the importance of light wavelength detection in plant development. Plants use this mechanism to adjust growth and developmental processes in response to changes in their light environment.

Photoreceptors in Plants

Photoreceptors, like phytochrome, are proteins that help plants detect and respond to light. Different photoreceptors are tuned to specific light wavelengths, ensuring that plants can mediate diverse responses such as phototropism, where other specialized receptors (e.g., phototropins) play a central role.

Phytochrome

Phytochrome is a class of photoreceptor pigments found in plants that specifically absorb red and far?red light, playing a crucial role in regulating various developmental processes such as seed germination, shade avoidance, and circadian rhythms.

Interconvertible Forms

A key feature of phytochrome is its existence in two interconvertible forms, typically referred to as Pr (red-absorbing form) and Pfr (far-red-absorbing form). These forms change into one another upon exposure to light, thereby enabling the plant to sense the quality and duration of light in its environment.

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