Fine structure of cytoplasm in relation to synthesis and secretion in plant cells

During division and development there is within the cell an organized sequence of synthesis and movement of materials and organelles. The position of the organelles is related both to the formation of the material and to its organized deposition or transport to particular sites at particular times within and outside the cell membrane. Plant tissues offer unique opportunities for the study of development since each cell in a column of cells which lies between the meristematic and the mature regions of the tissue represents a stage in the sequence of the growth and these can be studied either separately or relative to one another. The tissues are also very suitable for microscopical techniques such as radioautography and freeze-etch that are of especial importance for studying the sites of synthesis and the movement of material within the cell.