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Question
Cork cambium forms tissues that form the cork. Do you agree with this statement? Explain.
Solution
When secondary growth occurs in the dicot stem and root, the epidermal layer gets broken. There is a need to replace the outer epidermal cells for providing protection to the stem and root from infections. Therefore, the cork cambium develops from the cortical region. It is also known as phellogen and is composed of thin-walled rectangular cells. It cuts off cells toward both sides. The cells on the outer side get differentiated into the cork or phellem, while the cells on the inside give rise to the secondary cortex or phelloderm. The cork is impervious to water, but allows gaseous exchange through the lenticels. Phellogen, phellem, and phelloderm together constitute the periderm.
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RELATED QUESTIONS
What is periderm? How does periderm formation take place in dicot stem?
Cork cambium cuts off cells on the inner side to form ______ and on the outer side to form ______.
Cork cambium gives rise to
Match List - I with List - II.
| List - I | List - II | ||
| (a) | Lenticels | (i) | Phellogen |
| (b) | Cork cambium | (ii) | Suberin deposition |
| (c) | Secondary cortex | (iii) | Exchange of gases |
| (d) | Cork | (iv) | Phelloderm |
Choose the correct answer from the options given below.
Interfascicular cambium and cork cambium are formed due to ______.
Phellogen and Phellem respectively denote ______.
Give one basic functional difference between phellogen and phelloderm.
Arrange the following in the sequence you would find them in a plant starting from the periphery – phellem, phellogen, phelloderm.
If one debarks a tree, what parts of the plant is being removed?
What is the commercial source of cork? How is it formed in the plant?
What is the difference between lenticels and stomata?
