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fatty substances on the surface of organs (e.g. stems, leaves, etc.) above the plant floor. It is secreted by the skin cells. This structure is most evident on the surface of the leaves, as is the outer layer of the skin of the branches, flowers, fruits and young roots. Its function mainly protects, it can not only limit the loss of water in the plant body, but also can resist
microorganisms
and other adverse effects. An important chemical component of the keagonal layer is the, a hydroxy fatty acid containing 16
18 to 18 carbon. The layer is often divided into two layers, close to the outer wall of the skin cell, and is a layer consisting of and cellulose; The thickness of the layer is greatly affected by the environment, the leaves grown under arid and sunny conditions, the layer is thicker and contains more wax, while the growth in water or wet environment is thin or not at all.
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