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Plants with bark include trees, woody vines, and shrubs. Bark refers to all the tissues outside the vascular cambium and is a nontechnical term. [1] It overlays the wood and consists of the inner bark and the outer bark. The inner bark, which in older stems is living tissue, includes the innermost layer of the periderm. The outer bark on older ...
There are several distinct kinds of cambium found in plant stems and roots: Cork cambium, a tissue found in many vascular plants as part of the periderm. Unifacial cambium, which ultimately produces cells to the interior of its cylinder. Vascular cambium, a lateral meristem in the vascular tissue of plants.
Cork cambium (pl.: cambia or cambiums) is a tissue found in many vascular plants as a part of the epidermis. It is one of the many layers of bark, between the cork and primary phloem. The cork cambium is a lateral meristem and is responsible for secondary growth that replaces the epidermis in roots and stems.
The dark horizontal lines on silver birch bark are the lenticels. [1]A lenticel is a porous tissue consisting of cells with large intercellular spaces in the periderm of the secondarily thickened organs and the bark of woody stems and roots of gymnosperms and dicotyledonous flowering plants. [2]
This allows the plant to select the solutes that pass further into the plant. It thus forms an important barrier to harmful solutes. [4] For example, mangroves use suberin to minimize salt intake from their littoral habitat. Suberin is found in the phellem layer of the periderm (or cork). This is outermost layer of the bark. The cells in this ...
All plant organs arise ultimately from cell divisions in the apical meristems, followed by cell expansion and differentiation. Primary growth gives rise to the apical part of many plants. The growth of nitrogen-fixing root nodules on legume plants such as soybean and pea is either determinate or indeterminate. Thus, soybean (or bean and Lotus ...
In woody plants, the cortex is located between the periderm (bark) and the vascular tissue (phloem, in particular). It is responsible for the transportation of materials into the central cylinder of the root through diffusion and may also be used for storage of food in the form of starch. [5]
The pattern of stem growth in Lepidodendrales can be reconstructed by analyzing their cortical growth patterns. When plants are immature, the cortex is extensive and the outer stem surface is covered with many rows of leaf bases. As the tree continues to grow, the secondary xylem and periderm originate from the vascular cambium and phellogen ...