Mesophyll – Definition & Detailed Explanation – Botanical Terms Glossary

What is Mesophyll?

Mesophyll is a specialized tissue found in the leaves of plants. It is responsible for carrying out photosynthesis, the process by which plants convert sunlight into energy. Mesophyll cells are located between the upper and lower epidermis of the leaf and contain chloroplasts, the organelles where photosynthesis takes place. Mesophyll tissue is crucial for the survival of plants, as it allows them to produce their own food and energy.

What are the types of Mesophyll?

There are two main types of mesophyll tissue: palisade mesophyll and spongy mesophyll. Palisade mesophyll is located in the upper layer of the leaf and consists of tightly packed, column-shaped cells. These cells contain a high concentration of chloroplasts and are responsible for most of the photosynthetic activity in the leaf. Spongy mesophyll, on the other hand, is located in the lower layer of the leaf and consists of loosely arranged, irregularly shaped cells. These cells also contain chloroplasts but are more spread out, allowing for increased gas exchange within the leaf.

What is the function of Mesophyll?

The main function of mesophyll tissue is to carry out photosynthesis. During photosynthesis, plants use sunlight, carbon dioxide, and water to produce glucose, a simple sugar that serves as the plant’s primary source of energy. Mesophyll cells contain chloroplasts, which contain the pigment chlorophyll. Chlorophyll absorbs sunlight and converts it into chemical energy, which is used to drive the photosynthetic process. Mesophyll tissue also plays a role in gas exchange, allowing plants to take in carbon dioxide from the air and release oxygen as a byproduct of photosynthesis.

How is Mesophyll structured?

Mesophyll tissue is composed of two main types of cells: palisade mesophyll cells and spongy mesophyll cells. Palisade mesophyll cells are elongated and tightly packed, with a high concentration of chloroplasts located near the cell walls. These cells are arranged vertically to maximize sunlight absorption and photosynthetic activity. Spongy mesophyll cells, on the other hand, are more loosely arranged and irregularly shaped, with chloroplasts scattered throughout the cell. These cells are surrounded by air spaces, which allow for increased gas exchange within the leaf.

What is the significance of Mesophyll in plant physiology?

Mesophyll tissue is essential for the survival of plants, as it allows them to produce their own food and energy through photosynthesis. Without mesophyll tissue, plants would not be able to convert sunlight into glucose, which is necessary for growth, development, and reproduction. Mesophyll tissue also plays a role in regulating water loss through transpiration, as well as gas exchange through stomata, small openings in the leaf surface. Overall, mesophyll tissue is a critical component of plant physiology and is vital for the health and function of plants.

How does Mesophyll contribute to photosynthesis?

Mesophyll tissue plays a crucial role in the process of photosynthesis by providing the necessary cells and structures for light absorption, carbon dioxide uptake, and glucose production. Palisade mesophyll cells contain a high concentration of chloroplasts, which are responsible for capturing sunlight and converting it into chemical energy. Spongy mesophyll cells help facilitate gas exchange by allowing carbon dioxide to enter the leaf and oxygen to exit. Together, these two types of mesophyll cells work in concert to ensure that photosynthesis can occur efficiently and effectively in plants.