Question: What plant contains phtochromes and is sensitive to light?
About the article "Botany", section "Plant hormones".

Candidate passages:
The plant is cultivated as an ornamental for its showy foliage and purple flowers.
It is sensitive to cold but can tolerate a light frost. 
Oceanographers have divided the ocean into zones based on how far light reaches.
All of the light zones can be found in the oceanic zone.
The epipelagic zone is the one closest to the surface and is the best lit.
It extends to 200 metres and contains both phytoplankton and zooplankton that can support larger organisms like marine mammals and some types of fish.
Past 200 metres, not enough light penetrates the water to support life, and no plant life exists (NHPTV).
There are creatures however, which thrive around hydrothermal vents, or geysers located on the ocean floor that expel super heated water that is rich in minerals.
These organisms feed off of chemosynthetic bacteria, which use the super heated water and chemicals from the hydrothermal vents to create energy in place of photosynthesis.
The existence of these bacteria allow creatures like squids, hatchet fish, octopuses, tube worms, giant clams, spider crabs and other organisms to survive (Knight).
Due to the total darkness in the zones past the epipelagic zone, many organisms that survive in the deep oceans do not have eyes, and other organisms make their own light with bioluminescence.
Often the light is blue green in colour, because many marine organisms are sensitive to blue light.
Two chemicals, luciferin and luciferase that react with one another to create a soft glow.
The process by which bioluminescence is created is very similar to what happens when a glow stick is broken.
Deep-sea organisms use bioluminescence for everything from luring prey to navigation (Knight). 
Chamaecrista nictitans (Sensitive Partridge Pea, Small Partridge Pea or Wild Sensitive Plant) is a herbaceous species of legume widely distributed through the temperate and tropical Americas.
It is an annual plant capable of rapid plant movement—its leaflets fold together when touched.
It is similar to "Chamaecrista fasciculata" except that the leaves are smaller. 
C-41 film consists of an acetate or polyester film base, onto which multiple emulsions are coated.
Each layer is only sensitive to a certain color of visible light.
In the classic illustrative example, there are three emulsions: one is red sensitive, another is green sensitive, and the last is blue-sensitive.
The top layer is blue-sensitive.
Beneath the blue layer is a yellow filter, composed of dyes or colloidal silver.
All silver-based photographic emulsions have some sensitivity to blue light, regardless of what other colors they may be sensitized for.
This filter layer serves to remove the blue light, which would expose the layers beneath it.
Beneath the blue-sensitive layer and the yellow filter are the green and red sensitive layers.
The illustrative example outlined above differs from the design of actual film, in respect to the number of layers.
Almost all C-41 films contain multiple layers sensitive to each color.
Each of these layers have different speed and contrast characteristics, allowing the film to be correctly exposed over a wider range of lighting conditions.
In addition to multiple emulsion layers, real films have other layers that are not sensitive to light.
Some films are top-coated with UV blocking layers or anti-scratch coatings.
There also may be layers to space different emulsions, or additional filter layers.
Each emulsion layer, in addition to the light-sensitive components, contain chemicals called dye couplers.
These couplers, located in the blue, green and red-sensitive layers, produce yellow, magenta and cyan dyes, respectively, when developed. 
Just as fisherman seek conditions where the chance of catching fish is optimized, fish seek areas where the chance of catching their food is optimal.
Most game fish seek waters that are rich in food such as smaller fish, insects or shrimp.
And, it follows, that these smaller fish, insects and shrimp congregate where their food is most concentrated.
Scientific research shows that all members of this food chain have eyes sensitive to the colors blue and green.
This probably evolved because the water these animals live in is blue or greenish in color.
Water, containing little particulate matter, scatters light in the blue region of the spectrum.
If water is rich in nutrients and contains photosynthetic microorganisms and plants, the chlorophyll in their bodies preferentially absorb red light.
The remaining, unabsorbed light is transmitted and scattered, thus giving the water a greenish appearance.
If water contains a lot of organic material from decaying plant life or suspended sediment, it may take on a yellow-brown color.
Fish and some members of their food chain have color receptors in their eyes optimized for the light of their “space”.
Eyes that can see a single space color can detect changes in light intensity.
This is equivalent to a world in black, white and shades of gray.
In this simplest level of visual information processing, an animal can recognize that something is different in its space—i.e., that there is food or a predator “over there”.
Most animals living in a lighted world have an additional visual resource: color vision.
By definition, that requires that they have color receptors containing at least two different visual pigments.
To efficiently perform this function in water illuminated with light, an aquatic animal would have visual pigments sensitive to the background “space” color and one or more visual pigments offset from this blue-green region, say, in the red or ultraviolet region of the spectrum.
This imparts a clear survival advantage to these animals because they can detect not only changes in light intensity but also contrasts in color.
Many fish, for example, have two color receptors, one in the blue region of the spectra (425-490 nm) and the other in the near UV (320-380 nm).
Insects and shrimp, members of the fish food chain, have blue, green (530 nm) and near UV receptors.
In fact, some aquatic animals have up to ten different classes of visual pigment in their eyes.
By comparison, humans have three with maximum sensitivities in the blue (442 nm), green (543 nm) and yellow (570 nm).
It is the differential responses of these receptor cells that enable color vision.
It has been known for a long time that a light attracts fish, shrimp and insects at night.
But what is the best color for a light attractor?
Based on the biology of visual receptors discussed above, the light should be blue or green — the space colors of fish and members of their food chain.
However, while blue or green light is desirable it is not essential.
Even if the eyes of fish or members of its food chain have color receptors most sensitive to the blue or green, these same receptors have a broad but decreased sensitivity to other colors.
So, if a fishing light source is intense enough, other light colors will also attract.
For example, a sodium vapor light with its characteristic yellow color will attract fish — if intense enough.
A fishing light attractor can also be white light because a portion of its total energy is in the blue to green region.
The perfect fishing light would have the following properties: 1) high intensity, 2) emit its light in a color similar to the fishes space (blue or green), 3) be powered by a portable electrical supply and 4) be submersible.
The last attribute is desirable because significant amounts of light energy from land- or boat-mounted lights are lost by reflection off the surface of the water.
No commercial light satisfies all four of these criteria.
For example, many high intensity lights such as tungsten-halogen (incandescent), medium pressure mercury or metal-halide discharge lights are so power hungry that they can only be operated for very short periods of time on a battery, thus compromising convenient portability.
While LEDs and fluorescent lights draw much less electrical energy, most are not very bright.
Further, many of the above lights cannot be submerged in water without risk of electrical shock or damage to the light system.