vascular cambium

cork cambium

Function: Causes intermediate growth

Source: embryonic cells of embryo

Source: Parenchyma cell dedifferentiation

typical

Located in the root hair zone, including epidermal cells and root hairs

Function: absorb moisture and inorganic salts

Features: Contains a large amount of chloroplasts, capable of photosynthesis, also known as green tissue. The cells are obviously vacuolated, forming developed gaps.

Function: Store nutrients, such as starch, sugar, protein and oil, tannin, calcium oxalate, etc.

Specialized into water storage tissue to enable plants to adapt to growth in arid environments

Form a network of air cavities and airways

Accumulating large amounts of air facilitates respiration and gas exchange of cells in organs

Features: Cell wall inner processes grow, forming many irregular protrusions, significantly expanding the surface area of ​​the plasma membrane

Conducive to the absorption and transfer of substances by cells, and plays a role in short-distance transportation

Characteristics: The cell wall is unevenly thickened and is of primary wall nature. It contains protoplasts and chloroplasts, has the potential to divide, and can participate in the formation of cork cambium.

It has a uniformly thickened secondary wall and is often lignified. It has no protoplasts after maturity and is a dead cell.

fiber

stone cells

The end wall dissolves to form perforations. The end wall with perforations is called a perforated plate.

Ring pattern, thread, ladder pattern, mesh pattern, hole pattern