Cell sap意思

"Cell sap" is a term used in plant biology to describe the liquid contents of a plant cell's cytoplasm, excluding the vacuolar contents. It is also known as "cytosol" or "sap." The cytoplasm is the semifluid substance inside the cell that is enclosed by the cell membrane and contains the cell's organelles.

The cell sap is a complex mixture of various organic and inorganic substances, including water, enzymes, sugars, amino acids, ions, and other metabolites. It plays a crucial role in the metabolic activities of the cell, such as photosynthesis, respiration, and various metabolic reactions.

In plants, the cytoplasm can be divided into two main regions based on their density and composition: the soluble cell sap (cytosol) and the insoluble cell sap (which includes the cytoskeleton, membranes, and organelles). The soluble cell sap is the fluid portion of the cytoplasm that is freely diffusible and contains dissolved substances.

The composition of the cell sap can vary among different types of plant cells and can change in response to environmental conditions, such as changes in light, temperature, and water availability. Understanding the composition and function of cell sap is important for studying plant physiology and biochemistry.