rhytidome
Quick Summary
The rhytidome is the outermost layer of bark on woody plants, essentially the dead, layered bark that forms external to the most recent periderm (cork cambium). This outer bark is composed of cork and old, dead phloem tissue. The dead cork cells are coated with suberin, a fatty substance that makes them impermeable to water and gases, though gas exchange can occur through spongy areas called lenticels. The term "bark" broadly refers to all tissues outside the vascular cambium, with the inner bark (soft bark or bast) being secondary phloem that transports food from leaves, and the outer bark being a product of the cork cambium.12
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bark…dead phloem, is known as rhytidome. The dead cork cells are lined with suberin, a fatty substance that makes them highly impermeable to gases and water. Gas exchange between the inner tissues of bark-covered roots and stems and their surroundings takes place through spongy areas (lenticels) in the cork.
Read More…dead phloem, is known as rhytidome. The dead cork cells are lined with suberin, a fatty substance that makes them highly impermeable to gases and water. Gas exchange between the inner tissues of bark-covered roots and stems and their surroundings takes place through spongy areas (lenticels) in the cork.
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angiospermDermal tissue…of the bark are the outer bark, composed of dead tissues, and the inner bark, composed of living tissues of the secondary phloem. Outer bark is shed continually from a tree, often in a distinctive pattern, as the circumference increases because its dead cells cannot accommodate the increased diameter. Bark…
Read More…of the bark are the outer bark, composed of dead tissues, and the inner bark, composed of living tissues of the secondary phloem. Outer bark is shed continually from a tree, often in a distinctive pattern, as the circumference increases because its dead cells cannot accommodate the increased diameter. Bark…
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