Lucius is around to teach you about light and the role it plays in plant-growth. Plants are like little green factories that require sunlight to live and produce food. Plants cannot make their food without light, a process known as photosynthesis. This is a very vital process allowing plants to absorb sunlight and transform it into energy. But not all light is created equal. Light consists of lots of colours, and each colour exists at a different length called a wavelength. To human eyes, the colors we can see are red, orange, yellow, green, blue, violet, and indigo. But for plants, there are many colors that are key for their growth and well-being.
Plants require four primary colors of light for strong growth: red, blue, green, and far-red. All of these colors assist plants in a variety of ways. Red light is the light with the longest wavelength (and, therefore, lowest energy), and it gets through the atmosphere well and therefore is very useful for growing and flowering plants. Blue light has a short wavelength; it is an important part that creates strong roots. This is important because strong roots allow plants to soak up water and nutrients from the soil. Green light is somewhat different, in that plants do not use it much. Instead, they reflect it, which is why many plants appear green! But smallish role is a role, which is why green light still matters in the context of photosynthesis. The far-red light, the shortest wavelengths, allows plants to respond to light in their environment.
Blue and red light is super important for poor plant growth Red light is particularly beneficial for plants in growth and flowering stages. It boosts the production of chlorophyll, the green pigment in plants that allows them to harness sunlight to create food. In the absence of sufficient red light, plants may grow weak and small, a trait we do not want for our plants! Blue light matters, too, because it contributes to the development of strong, healthy roots. A lack of blue light can cause plants to have weak and skinny stems and tiny roots that take a lot of energy to suck up water and nutrients from the soil. This makes it difficult for them to survive.
Various forms of light can alter multiple aspects of plant growth. By learning how these various lighting types work, we can improve the health of plants in our gardens or homes! Red light, for example, encourages the flowering and fast growth of plants because it increases the production of important substances such as chlorophyll. Many of us know that blue light also acts to regulate the growth of plants and sturdiness. Green light, although reflected by plants, does still contribute to photosynthesis and assist in the process of gas exchange that plants require for respiration. Far-red light helps, too, in allowing plants to adapt to varying light conditions. Learning how the different lights impact plant growth can in turn helps ours to grow better and stronger.
Photosynthesis is one process in which green light is a major contributor to, even though plants do not utilize green light too much. Green plants make their food by a process called photosynthesis. They absorb sunlight, carbon dioxide from the air and water from the ground to make glucose, a type of sugar that provides them with energy, and oxygen, which they send into the air. Chlorophyll is the reason plants are green, as it absorbs blue and red light, reflecting green, which gives it its green color. Natural light also helps regulate the gas exchange of stoma openings in the leaves to control the flow of gases inside and outside the plant which is vital for the plant’s survival and well-being.
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