Investigating the Amount of Stomata on a Variety of Different Sized Leaves

Investigation of pore number of leaves of various sizes Introduction In this experiment, in order to compare the number of pores per square millimeter, investigate the number of pores in large and small leaves of the same plant. Pores are small openings in the lower epidermis of the leaves. There are two bean shaped protected cells including chloroplasts around each small hole. Pores are a highly efficient structure because they control transpiration rate (water loss) and gas exchange.

Examine whether there is a difference in the frequency of stomata between green and white areas of leaves. Since green indicates the presence of chloroplasts including chlorophyll, it is predicted that there is a higher stomach frequency in the green area of ​​the leaves To do. In contrast, since the white part of the same plant species does not contain chlorophyll it is clear that they do not participate in photosynthesis, so the porosity is lower as there is no need for gas exchange.

Essay.com: Look for differences in pore frequency between leaf green and white parts

Determine if there is a difference in pore frequency between leaf green and white areas

In plants, photosynthesis usually occurs in leaves. This is a place where plants can obtain photosynthetic ingredients in a convenient place. Carbon dioxide and oxygen enter and leave the leaf through pores called pores. Water moves from the root through the vasculature to the leaves. Chlorophyll in chloroplasts of leaf cells absorbs sunlight. The photosynthetic process is divided into two main parts: light dependent reaction and light independent or dark reaction. When solar energy is captured and generates a molecule called ATP (adenosine triphosphate), a light dependent reaction occurs. Dark reaction occurs when glucose is made using ATP (Calvin Cycle)

Leaves contain water. This is necessary to convert light energy to glucose by photosynthesis. Leaves have two structures to reduce water loss, stratum corneum and pores. The stratum corneum is a wax coating on the leaves above and below that prevents moisture from evaporating into the atmosphere (Figure 3a). The stratum corneum provides important protection against excessive moisture loss, but they are also not resistant to penetration, as they must also allow carbon dioxide and oxygen evacuation (for photosynthesis). These gases enter and exit the blade through the opening on the lower surface called the vent (Figure 3b). After entering the leaf through the pores, carbon dioxide enters the mesophyll cells where photosynthesis occurs and glucose is built up