AP BIOLOGY

Detailed explanation-1: -Phytochrome is a pigment that absorbs red light and far-red light. It also absorbs blue light. It regulates the growth and developmental process of flower induction, leaf senescence, seed germination, seed elongation etc. Phytochrome belongs to the chromoprotein family and has a pigment known as chromophore.

Detailed explanation-2: -Phytochromes are a class of photoreceptor in plants, bacteria and fungi used to detect light. They are sensitive to light in the red and far-red region of the visible spectrum and can be classed as either Type I, which are activated by far-red light, or Type II that are activated by red light.

Detailed explanation-3: -The phytochrome system acts as a biological light switch. It monitors the level, intensity, duration, and color of environmental light. The effect of red light is reversible by immediately shining far-red light on the sample, which converts the chromoprotein to the inactive Pr form.

Detailed explanation-4: -Phytochrome is a photoreceptor, a pigment that plants, and some bacteria and fungi, use to detect light. It is sensitive to light in the red and far-red region of the visible spectrum.