Meristem

Meristem is plant tissue that stays embryonic for as long as the plant shall live. This allows for more intermediate growth to occur. It consists of cells that divide frequently to make additional cells. Some of the products from these divisions stay in the meristem, while others differentiate and are made into tissues and organs of the growing plant. Apical meristems are meristems located at the tips of buds and shoots. Cell division that occurs here produces the cells that make a plant grow taller, a process called primary growth. Primary growth allows roots to push through soil and have increased exposure to light and CO2. Shown in the picture of the plant, in the center of all the leaves, is a terminal bud, which is a location of apical meristems. A terminal bud is embryonic tissue located at the tip of a shoot, made of a series of internodes and nodes and developing leaves. Apical meristems are also found in root tips and axillary buds. An axillary bud is an embryonic shoot found in the angle between a stem and leaf. It is usually dormant; in many plants, the terminal buds make a hormone that inhibits the growth of the axillary buds.

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