When the first color TV entered in our lives in the 1980s, it made a huge difference. It was only a few of our neighbors who had one, and we always wanted to go to him to watch cartoons in color, which was much more fun than in black-and-white. Younger generations who are reading this article were directly introduced to color television, so they probably could not fully realize its value.

The same is perhaps true of nature. We have come to know the nature, trees, flowers, fruits, vegetables, rocks, and animals all in their own beautiful colors – that’s how we have observed them since we were born, so sometimes we are not aware of their value. Can we imagine oranges, apples, strawberries, tomatoes, eggplants, daisies, magnolias, tulips, and roses without color? We cannot describe colorlessness, so we use “black” and “white” to express the contrast.

Colors of plants

Part of the earth is covered with snow in winter. Almost black and white during this period, our world becomes colorful with spring’s arrival and reminds us of the resurrection after death. In different seasons, almost every shade of color parades before our eyes: the white, yellow, red, and pink of roses, tulips, carnations, apples, and plums. Yet, how do these colors emerge? How do plants—whose only contact is dark soil and colorless air and water—attain their colors?

As with inanimate objects, the color reflected by plants depends on their pigment [1] molecule. Usually yellow and red in color, there are three types of carotenoids (biological pigments): carotene, lycopene, and xanthophylls. The green color in several fruits and vegetables come from chlorophylls. Flavonoids are substances that give plants their white, light-yellow color. Anthocyanins are color pigments that range from pink to purple. Anthoxanthin are pigments that give colors like white and cream. Tannins are substances that turn red and solidify when heated with acid.

The correlation between colors and pollination

Plants are an indispensable part of the food chain and nature’s balance. Pollination [2] is essential for the reproduction and growth of flowering plants. Although the wind and some animals are instrumental in pollination, this task is largely assigned to bees and similar small insects. The colors of flowers also matter to attract the attention of bees. Bees fulfill a vital role in the pollination and subsequent fertilization of flowers, while there are also flowers purposely not pollinated by bees. For example, since bees cannot distinguish the color red, they cannot pollinate flowers having this color. Some red plants such as laurel, red carnations, and wild flax, which do not have other colors, are pollinated by other insects. Since the nectar of these plants is located deeper in their bodies, insects such as butterflies with long mouthparts like proboscis have the duty to reach for them. As in this example, all living beings have been given certain skills and potentials in order to do certain tasks so the ecosystem and the symbiosis between plants and animals can be maintained.

Anthocyanins

Anthocyanins are the largest group of pigments, and they color plants on the red, blue, and purple spectrum. Anthocyanins are the pigments that make several fruits and vegetables such as raspberries, blackberries, sour cherries, damson plums, purple carrots, red cabbages, beets, eggplants, red radishes, pomegranates, tree strawberries, black and red grapes, and many more.

Anthocyanins have properties other than color. These water-soluble substances are also highly-potent antioxidants which prevent the oxidation of vital molecules in the cell and the oxidation of the cell itself. Studies have even shown the inhibitory effect anthocyanins have on cell growth in some types of cancer. Studies conducted at the University of Michigan have revealed the positive effect these substances have on relieving muscle pain, lowering sugar levels, and reducing fat in the liver.

Anthocyanins obtained from some fruits and flowers are also used as colorants in various foods.

Anthocyanins absorb visible light with wavelengths between 400-800 nm, and the reflected part is seen as color. There are over 600 anthocyanins known today. Flowers can also accumulate a mixture of anthocyanin types, resulting in numerous color variations. Thus, these pigments function as masterpieces of art in hundreds of thousands of different shades of red, blue, and purple.

Changes in the molecular structure of the cited substances is what lies behind plants’ having thousands of different colors and shades. With the differentiation of the R1, R2, and R3 groups shown in the figure, anthocyanin absorbs different ranges of light and gives the plant different colors. These molecules’ structures change at the primary, secondary, and tertiary levels. When the groups indicated by (R) in the figure are replaced by hydrogen (H), hydroxide (OH), or alkyl (R), the color changes. If a green leaf turns yellow at first and red later, it means these chemical changes are taking place in its molecules.

While we watch the colorful flowers and fruits spread before us without knowing these details, the pigment molecules, dispatched like officers or soldiers in the background, repeat the same chemical processes every year, fulfilling their duties in full submission. Hundreds of publications on anthocyanins attempt to both reveal the intricacies of this system and illuminate the functions of these molecules within the cell.

Color vision

It has been found that a healthy human eye can distinguish approximately one million colors. How is this possible?

After passing through the cornea, pupil, and lens of the eye, the incoming light falls onto the retina, the wall of the eye’s posterior dark chamber. Special cells here, resembling very complex electronic circuits, convert light into electrical signals and transmit them to the brain. This is an immensely complex system in which the light energy is converted into electrical energy of certain intensities, and as a result an image is formed in the brain. Photoreceptor (light receptor) cells in the retina are of two types: cone- and rod-shaped. Cone cells are designed for color vision, while rod cells are designed for black-and-white vision. The task of these two types of cells is to convert the light falling on them into electrical signals. Humans have three types of cone cells (blue, green, red) that react differently to various wavelengths of light. Each cell has a different sensitivity to light. The wavelength of light to which blue cone cells are most sensitive is about 430 nanometers, green cone cells about 530 nm and red cone cells about 560 nm.

Our eyes were not created with the capacity to perceive all the wavelengths that exist as colors. Therefore, animals can see certain color wavelengths we cannot. Wavelengths such as infrared and ultraviolet can be seen as colors by some animals. For example, one study found four types of cone cells in the eye of the broad-tailed hummingbird (Selasphorus platycercus) [3]. This hummingbird also appears to detect ultraviolet wavelengths invisible to humans. Scientists think this may play a vital role in their feeding and predator avoidance behavior.

The wonderful harmony of colors we see on earth and in the sky soothes our souls and gives us peace.

“And whatsoever He has created for you on earth of varying colors (and diverse forms and qualities): surely in that is a sign for people who reflect and are mindful.” (The Qur’an, 16:13)

Notes

1. Colorant organic or inorganic molecule.
2. Pollination is the process by which pollen produced in the male organ of the plant is transported to the apex of the female organ on various occasions. Mary Caswell Stoddard et al., “Wild hummingbirds discriminate nonspectral colors”, PNAS, June 15, 2020117 (26), 15112–15122, www.pnas.org/content/early/2020/06/09/1919377117

Many important characteristics exist in seeds. Seeds are equipped with all the necessary information about the branches and leaves of the plant which they will become, as well as the number and shape of these leaves. Within the seed is programmed the color, fineness or thickness of the bark, the number and width of the tubes that carry food and water, whether the plant will bear fruit or not, and if it bears fruit, the taste, smell, shape and color of this fruit. Even information about how the plant will react to a negative condition in the environment during normal development is registered in this program. For example, a plant that would normally develop under ideal climatic conditions is programmed to produce seeds in a short term to protect reproduction under unsuitable conditions like drought and great heat. God is He Who splits the seed-grain and the fruit-stone (so that they germinate by His command). He brings forth the living from the dead, and He is One Who brings forth the dead from the living; such is God: how then are you turned away from the truth and make false claims? (An’am 6:95)

If we consider the growth process of the plant from a seed that is equipped with perfect information, we can see that once the appropriate conditions have been created the seed first germinates and then the body and leaves are formed on this stem. When the time is right, flowers form in keeping with the divine order. The flowers that later form the fruit and seeds for further plants are either brought together with their own pollen (cleistogamy or self-pollenization) or with other pollen from another plant of the same type (cross-pollination) in a perfectly organized system. Self-pollenization occurs either before the flower opens or after the pollen has developed. Because the pistil and stamens of some plants are hidden by some other parts of the plant, it is difficult for the pollen to reach here, so the plant obeys what is ordered and self-pollinates.

In cross-pollination, plants use the pollen from another plant of their own species. Pollen transportation occurs with the help of the wind, rain or insects that visit flowers.

The flowers of many plants that are pollinated by the wind and rain are very modest in appearance, but they have been created in a way to produce pollen in abundance. Although most of the pollen that is carried away by the wind and rain are destroyed, this lost pollen organically enriches the soil and at least some of this pollen will find a flower to pollinate. Our Lord has bestowed those flowers that are pollinated by insects with various colors and shapes to attract these visitors. During pollination, the pollen of flowers that have less pollen than the self-pollinating flowers are carried by bees and other insects, whose legs, wings, and antennae have been created specifically for this task, as they have been inspired (Nahl 16:68–69). Nectar and pollen are the reward for these insects which provide pollination.

Bees are the most important group among the insects that carry out the task of pollination. When bees are mentioned, most people think of the honeybee, but bumblebees also serve mankind. In addition to the products they offer to us, bees are indispensable for their contributions to plant reproduction.

Bees store the nectar they have sucked from the flowers in a “honey stomach” and then empty this nectar into a honeycomb as honey. The bees legs, granted to them by the Creator, allows them in their duty of collecting pollen. The back legs of the bees are different from that of all other insects. The long hairs that are aligned on these stocky legs act almost like a basket to collect the pollen.

Of the 82 plant types that meet 90% of the human food needs around the world, 63 (77%) are pollinated by bees; without bees it would be impossible for these plants to produce seed. Bees are absolutely necessary for the formation of seeds in plants that we eat, like apples, pears, peaches, apricots, cherries, melons, watermelons or pumpkins, or indeed in those used in industry, like sunflowers, safflowers, rapeseed, cotton, or sugar beets, or those used for feeding livestock, like clover, sainfoin, red clover, or vetch. This task carried out by bee pollination every year throughout the world is much more important than the production of honey. Moreover, bees make life possible for animals from thousands of species who use these plants as food or shelter. We should not forget the connection Einstein drew between the disappearance of the bees from the ecosystem and Doomsday.

Another vital mission entrusted to bees is the prevention of erosion. Plants that need the pollination of bees, like members of the Asteraceae, Boraginaceae, Brassicaceae, Campanulaceae, Compositae and Fabaceae families, are widespread in areas were there are serious threats of erosion. Similarly, feed crops, which are very important in feeding livestock and preserving the ecological balance, also need insects for pollination. In plants like clover, the upper side of the flower organs is covered by a membrane; in these plants, bees break this membrane to get at the pollen; if it were not for bees, the pollen would remain trapped.

It is by Divine guidance that bees take nectar and pollen from the same type of plants all day. Even if there are other plants which contain more nectar and pollen, bees only stop at the type of flower that it first visited. The fact that bees collect nectar and pollen from the same type of plants all day long shows that this is not something they do randomly.

Like many other living things in the universe bees are in service to mankind, operating under the rules set by the Lord of the Worlds. However, activities that are carried out without investigating the meaning of the universe and the wisdom behind the creation of the living things, such as unplanned industrialization, which in turn has lead to an increase in air pollution, or the careless use of chemical materials, are the reason for a decrease in the population of bees, day by day. Never mind the wars and fires started by mankind, any venture that may cause the bees to disappear could lead to the destruction of mankind; if the bees become extinct, mankind will face many disasters, like erosion, desertification and the extinction of plants which are food for us and for the animals we raise.