Roses have been a popular part of human culture for thousands of years. Millions upon millions of roses are harvested every year and sold as gifts to represent affection and love throughout society. The successful growth and reproduction of the aromatic flowers relies heavily on their ability to successfully grow and reproduce within the world, through photosynthesis and other important physiological processes that take place within the plant itself.
Chlorophyll is a unique substance found mostly in the chloroplasts of green plants and is used in the process of photosynthesis. In roses, as with the majority of green plants, the chloroplasts are located within the leaves of the plant. It is the chlorophyll found within the chloroplasts that are responsible for the tint of green in the leaves. The less green found in the leaves of a plant, the less chlorophyll present.
Without chlorophyll, photosynthesis would be impossible. The definition of photosynthesis is ''putting together with light" and it is the process of combining sunlight, carbon dioxide and water to make sugar. The leaves of the rose allow for photosynthesis to occur and for food to be produced within the plant. Roses use the sugars formed to create starches, fats and proteins, which allow for growth and proper nutrition for the plant.
Foods produced within the green leaves of roses is used for various other processes throughout the plant. A major process of growth for roses is the production of rose hips. Rose hips are small, edible fruits that appear on the stems of roses and contain the seeds and other genetic information required for successful reproduction.
When planted, the parent rose's genetic information is carried from the plant into the seeds within the fruit. This genetic information contains all the information needed for reproduction to take place, including the instructions for developing its own leaves for future growth.
For the successful production of chlorophyll, iron—along with other macronutrients—is required. It aids in respiration of plant cells and in nitrogen fixation. When a deficiency of iron is present, along with nitrogen or magnesium, it is common for a rose plant's leaves to begin turning yellow. Fertilizing the rose bush is a quick fix to solve the majority of problems associated with low iron.