Experimental installation to measure the longitudinal growth of the plant
The growth of living organisms is the increase in weight or height, and this growth is a natural result of the growth of tissues and the division of cells in a certain way continues to lead to this result, which is different rate and nature of the object to another example, human growth in longitudinal and in And some organisms have the ability to regenerate their cells and regain their ability to grow, such as the starfish, which grows a new limb if one of its astral limbs is amputated, so that the rest of the body does not stop growing If a limb is amputated, the tree will continue to grow even if it is reduced Yama.
There are areas in every living organism that are responsible for growing more than others, and what concerns us now is the plants in general.
There are specific areas that are responsible for the longitudinal growth of the plants in the stem or root, to grow the leg up to the light, and the roots grow down far from light, and those areas for plants is the part called the alastomeric root or leg and is responsible part More specifically about that longitudinal growth in plants is at the top.
In these macrophages, the cells are more capable of dividing than the rest of the cells of any part of the stem or root. The cells divide into their nuclei very quickly to produce more new cells, which makes the plant grow. Longitudinal in both parts (stem and root). At the same time, the older cells that have been produced in the past are larger in size to be larger than the newly produced alastomeric membrane, which makes the plant incrementally larger in the basal parts of the stem and root.
Therefore, cell division and numerical increase at the top is responsible for the longitudinal growth of the plants. The increase in the size of the stem or root cells close to the top of the earth makes the plant grow exponentially and the diameter increases near the surface of the earth.
Therefore, if a poisonous chemical pesticide is placed on the growth areas (eg, stem or root) in a pea plant, for example, measuring the length of the stem and root at that time, and then examining it for forty-eight hours to re-measure its length and compare it with the length of the stem and root of other pea The herbicide has stopped growth because it kills the cells of the growth zone responsible for the longitudinal growth of the plant, and we find that the natural plant without a pesticide has increased longitudinally while the other stopped at the same length Which was previously measured.
Also, if the stem and root are identified by the circles of the pen and then examined after a period, we find the appearance of a new region in both the legs of the stem and the root is not defined, unlike the rest that was previously determined.
This explains that the tissues of the growth zone are active tissues that have a great ability to multiply due to the ability of their large cells to divide the cell to produce more and thus the growth of both vegetative groups (stem and leaves) and root (in soil).