Why are the flowers white?
Each of us more than once in his life admireda variety of shades, which the plant world has endowed with nature. Sometimes you can find flowers of such a color range that it is difficult to believe that they are real. However, not everyone knows why they differ in color from each other and why some flowers, especially night, are white. In this article we will tell you what determines the white color of different plants.
What determines the shade of the flower
Even on botany and biology in the school we know,that the color of the flowers depends on special substances called pigments. The plant world has about two thousand such dyes. In turn, the color of the pigment is due to its ability to absorb light. Thus, if the light rays that fall on an object are reflected completely, it will be white, if they are absorbed, then the object will be black.
How do flowers get blue, red orlilac color? This occurs when the object absorbs rays only in certain parts of the visible part of the solar spectrum. Then the coloring can be very different - from the red-orange hue to the blue-lilac.
Such pigments are called anthocyanins. They are part of the cell membranes or cell vacuoles juice. These pigments dissolve well in water. Their interaction with alkalis gives a blue color, and with acids - red shades. The blue color of cornflowers, red - roses and lilac - violets is due to the presence of dissolved anthocyanins in the cell sap.
Yellow shades of colors depend on the availability ofcells of plants of other pigments, which are called carotenoids. They give a yellow color to the flowers of dandelion, celandine and other plants. Green color, as is known, is due to the pigment chlorophyll.
What determines the white color of flowers
The white color of plants, as mentioned above,depends on the absolute reflection of the light rays incident on the plant. Why, then, do most of the colors that have a white coloration are nocturnal? It is important to note that the variegated color of flowers is conceived by nature with a very important goal - to attract pollinator insects. Flowers reproduce by means of pollination, therefore in this matter the main role is played by insects, which transfer pollen from one flower to another.
It turns out that it is the coloring of the flower that helpsin the struggle for the attention of pollinators. It is obvious that at night, it is best to notice the white color or other light shades. In addition, the aroma of many flowers intensifies during this period of the day. This phenomenon is also due to the need to attract night insects.
At night, these flowers flock to the night butterflies. For example, they perform pollination of night violet, gardenia, jasmine and so-called lunar flowers.