Anonymous
Jul 22
Describe the role of cambium in secondary growth of xylem and phloem?
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Jul 22
Cambium is a layer of meristematic tissue found in between the xylem and phloem in vascular plants. It is responsible for the secondary growth of xylem and phloem, which allows the plant to increase in girth and strength over time.
In the secondary growth process, the cambium cells divide and differentiate into new xylem and phloem cells. The cambium produces xylem cells towards the inside of the stem, which are responsible for transporting water and minerals throughout the plant. These xylem cells are arranged in concentric rings, with the older cells towards the center and the newer cells towards the outside.
Similarly, the cambium also produces phloem cells towards the outside of the stem, which are responsible for transporting sugars and other organic compounds throughout the plant. These phloem cells are also arranged in concentric rings, with the older cells towards the outside and the newer cells towards the inside.
Overall, the cambium plays a crucial role in the secondary growth of xylem and phloem, which allows the plant to increase in size and strength, as well as transport essential nutrients and water throughout the plant.
In the secondary growth process, the cambium cells divide and differentiate into new xylem and phloem cells. The cambium produces xylem cells towards the inside of the stem, which are responsible for transporting water and minerals throughout the plant. These xylem cells are arranged in concentric rings, with the older cells towards the center and the newer cells towards the outside.
Similarly, the cambium also produces phloem cells towards the outside of the stem, which are responsible for transporting sugars and other organic compounds throughout the plant. These phloem cells are also arranged in concentric rings, with the older cells towards the outside and the newer cells towards the inside.
Overall, the cambium plays a crucial role in the secondary growth of xylem and phloem, which allows the plant to increase in size and strength, as well as transport essential nutrients and water throughout the plant.
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Google Gemini AI
Jul 22
Role of Cambium in Secondary Growth of Xylem and Phloem
Cambium is a meristematic tissue located between the xylem (wood) and phloem (bark) in woody plants. It plays a crucial role in secondary growth, which results in the increase in thickness of stems and roots.
Secondary Xylem (Wood) Formation
- The cambium produces new xylem cells towards the inside (centripetal growth).
- These new xylem cells are secondary xylem, which differ from primary xylem in terms of cell size, wall thickness, and presence of vessels.
- Secondary xylem forms the major part of the wood in trees and shrubs.
Secondary Phloem Formation
- The cambium also produces new phloem cells toward the outside (centrifugal growth).
- The new phloem cells are secondary phloem, which is similar to primary phloem but may have thicker cell walls.
- Secondary phloem plays a role in the transport of nutrients from leaves to the rest of the plant.
Annual Rings
- In plants that experience seasonal changes, such as trees in temperate regions, the cambium produces more xylem during the growing season (spring and summer) and less during the dormant season (fall and winter).
- This difference in growth rate results in the formation of annual rings, which are visible in the cross-section of woody stems.
Additional Functions
- Cambium also produces cork cambium, which gives rise to cork cells that form the outer protective layer of bark.
- It can also differentiate into other cell types, such as parenchyma and fibers, depending on the plant species.
Importance of Secondary Growth
Secondary growth:
- Increases the thickness of stems and roots, providing structural support.
- Enlarges the conducting tissues (xylem and phloem), allowing for the efficient transport of water and nutrients.
- Provides a protective layer of bark, reducing water loss and protecting against pests and diseases.
Cambium is a meristematic tissue located between the xylem (wood) and phloem (bark) in woody plants. It plays a crucial role in secondary growth, which results in the increase in thickness of stems and roots.
Secondary Xylem (Wood) Formation
- The cambium produces new xylem cells towards the inside (centripetal growth).
- These new xylem cells are secondary xylem, which differ from primary xylem in terms of cell size, wall thickness, and presence of vessels.
- Secondary xylem forms the major part of the wood in trees and shrubs.
Secondary Phloem Formation
- The cambium also produces new phloem cells toward the outside (centrifugal growth).
- The new phloem cells are secondary phloem, which is similar to primary phloem but may have thicker cell walls.
- Secondary phloem plays a role in the transport of nutrients from leaves to the rest of the plant.
Annual Rings
- In plants that experience seasonal changes, such as trees in temperate regions, the cambium produces more xylem during the growing season (spring and summer) and less during the dormant season (fall and winter).
- This difference in growth rate results in the formation of annual rings, which are visible in the cross-section of woody stems.
Additional Functions
- Cambium also produces cork cambium, which gives rise to cork cells that form the outer protective layer of bark.
- It can also differentiate into other cell types, such as parenchyma and fibers, depending on the plant species.
Importance of Secondary Growth
Secondary growth:
- Increases the thickness of stems and roots, providing structural support.
- Enlarges the conducting tissues (xylem and phloem), allowing for the efficient transport of water and nutrients.
- Provides a protective layer of bark, reducing water loss and protecting against pests and diseases.
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