Molecular Plant Biology

Chloroplasts are organelles found in plant cells that contain chlorophyll, a green pigment that absorbs light energy from the sun. This light energy is used to convert carbon dioxide and water into glucose, a sugar molecule that plants use for energy.

The Golgi apparatus is responsible for packaging and secreting molecules, such as proteins and lipids, from the cell. It modifies and sorts these molecules before they are transported to their final destination.

Cytokinin is a plant hormone that promotes cell division and growth. It is involved in various physiological processes, including shoot and root development, leaf expansion, and fruit set.

The Calvin cycle is the light-independent reactions of photosynthesis. It is responsible for fixing carbon dioxide from the atmosphere into organic molecules, such as glucose, using the energy from ATP and NADPH generated during the light-dependent reactions.

Transpiration is the process by which plants lose water vapor through their leaves. It is driven by the evaporation of water from the surface of the leaves and is essential for the transport of water and nutrients from the roots to the leaves.

Collenchyma is a type of plant tissue that provides structural support. It is composed of cells with thickened cell walls that are rich in cellulose and pectin, which gives them their strength and flexibility.

Stomata are small pores on plant leaves that allow for gas exchange. They allow carbon dioxide to enter the leaf for photosynthesis and water vapor to escape from the leaf.

Gibberellin is a plant hormone that promotes seed germination and root growth. It also plays a role in stem elongation and fruit development.

Tropism is the process by which plants respond to changes in their environment. It is a directional response, meaning that the plant grows or moves in a specific direction in response to the stimulus.

Abscisic acid is a plant hormone that inhibits growth and promotes seed dormancy. It also plays a role in water stress responses and stomatal closure.

Photosynthesis is the process by which plants convert light energy into chemical energy. It occurs in the chloroplasts of plant cells and uses carbon dioxide and water to produce glucose, a sugar molecule that plants use for energy.

Xylem is a type of plant tissue that transports water and nutrients from the roots to the leaves. It is composed of vessels, which are hollow tubes that allow for the efficient transport of water and minerals.

Gibberellin is a plant hormone that promotes flowering and fruit development. It also plays a role in stem elongation and seed germination.