See more. These primary meristems will produce the cells that will form the primary tissues. Depending on where on the plant the meristem is, and on which signals it receives, the meristem tissue can give rise to new leaves, flowers, or roots. As the apical meristem grows and forms leaves, it leaves behind a region of meristematic cells at the node between the stem and the leaf. dermal, ground, and primary vascular tissues. Meristem tissue is not autonomous. 12. A good example would be the growth of a tree in height. Intercalary meristems produce growth at the base of grass blades, for instance. This vertical growth is also known as primary growth.

A. increase the width of a plant B. increase the mass of a plant C. increase the length of a plant D. lead to the production of bark E. produce the cork cambium 13. Groups of cells that have a similar structure or common function are called _____. Throughout the life of the plant, the rate of cell division and cell elongation in the meristems is regulated by plant hormones . Primary meristems produce tissues that _____. Figure: Apical meristem: (a) Root (b) Shoot Root apical meristem occupies the tip of a root while the shoot apical meristem occupies the distant most region of the stem axis. Apical meristems, which are located at the tips of shoots and roots in all vascular plants, give rise to three types of primary meristems, which in turn produce the mature primary tissues of the plant. At the meristem, the plant cells are continually proliferating and are not yet differentiated. In plants, the meristem is the area of tissue from which new growths are formed. 2. Note the Primary meristem definition, primary tissue derived from an apical meristem. The meristems which occur at the tips of roots and shoots and produce primary tissues are called apical meristems (Figure).

Each apical meristem will produce embryo leaves and buds as well as three types of primary meristems: protoderm, ground meristems, and procambium. Apical meristems and primary growth 3. Notice that the apical meristem produces three primary meristems, which produce the three primary tissue systems (dermal, ground, and vascular). They are therefore more in numbers, as compared to the promeristematic cells and play an important role as the origin of primary tissues (primary growth).

Lateral meristems and secondary growth Figure 35.12 Primary growth of a root. Mitosis is the type of cell division which occurs during growth. Primary Meristem. Primary meristematic cells arise from the promeristem and make up the apical tip (present at the shoot tip) as well as the root promeristem. Cell divisions in the corpus are in all directions and produce an interior mass of cells. 6.1.6 From primary apical meristem to secondary lateral meristems in roots – From longitudinal to radial growth Differentiation between shoot and root takes place in the so-

Some of the primary meristematic cells may produce cells that become permanent tissues, e.g. Growth in plants is restricted to special tissues called meristems. The primary meristem is also responsible for giving rise to the primary permanent tissues of the plant.

Figure 35.13 Organization of primary tissues in young roots.


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