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Term for newly formed tissue in plant, animal and human organisms (also occurs, for example, in the case of bone fractures at the fracture site). In botany, it is used to describe wound closure in plants. The irregularly proliferating tissue overgrows the wound surface from all sides like a bulge. A cork layer is formed on the outside and a cambium on the inside. A visible callus is formed, for example, when the vine is curled and when the vine is grafted at the point between the rootstock and the scions. This makes it easy and quick to determine whether the vine is a grafting or a vine with true roots. See also under vascular tissue.

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