Exempel på cell wall

• A typical living cell may be described as composed of a cell wall and contents. 

• As a result the cell walls grow thinner with loss of moisture,—in other words, the cell shrinks. 

• Each plant consists of a mass of protoplasm surrounded by an ill-defined cell wall. 

• The membrane surrounding the cell is known as the cell wall, and in young plant cells is always composed of cellulose. 

• While among plants the cell wall is almost always well developed, it is very common for animal cells to be entirely lacking in this external covering—as, for example, the white blood-cells. 

• Rather, a stimulus released from the cotyledon is more likely to induce the major cell wall degrading enzyme, endo- mannanase, within the endosperm itself.

• The endosperm has a very thick peripheral cell wall (cw).

• Therefore, most work has been performed on isolated aleurone layers (in which the starch is removed) and protoplasts (aleurone cells lacking the cell wall).

• A further factor relates to the potential biological deterioration of cell wall components by soft rot fungi, thereby reducing the strength of the wood.

• Proceeding from (b), as new cell wall formation continues to form during cytokinesis, these areas are devoid of surface projections.

• From a biological point of view, the role of the yeast adhesins was investigated by using different cell wall glycoprotein mutants.

• During development, the extensive thickening of the cell wall is specific to the lateral region of the endosperm and not to the micropylar region.

• For this species there is a good correlation between endosperm cell wall dissolution and radicle protrusion.

• The mechanisms regulating cell wall extensibility in the embryos before radicle protrusion, although central to germination control, remain elusive.

• All eggs which elicited a fertilisation potential secreted a detectable cell wall.

• What are the signals that trigger the transition from primary to secondary cell wall synthesis?

• Changes in the cell wall, vacuole, and membranes detected using electrical impedance spectroscopy.

• An additional experiment further suggested that the separation between the cell wall and plasma membrane was an artefact of the aqueous wash and dehydration process.

• However, direct evidence that these enzymes participate in cell wall modification or tissue weakening is still lacking.

• The essence of polarity is the redistribution and localisation of macromolecules, organelles and metabolic processes within the cytoplasm, plasmalemma and cell wall.