What is periderm? How does periderm formation take place in dicot stem?
What is periderm? How does periderm formation take place in dicot stem?
Periderm is composed of the phellogen, phellem, and phelloderm.
During secondary growth, the outer epidermal layer and the cortical layer are broken because of the cambium. To replace them, the cells of the cortex turn meristematic, giving rise to cork cambium or phellogen. It is composed of thin-walled, narrow and rectangular cells.
Phellogen cuts off cells on its either side. The cells cut off toward the outside give rise to the phellem or cork. The suberin deposits in its cell wall make it impervious to water.
The inner cells give rise to the secondary cortex or phelloderm. The secondary cortex is parenchymatous.
Similar Questions
Which of the following statements about cork cambium is incorrect?
Which of the following statements about cork cambium is incorrect?
- [NEET 2020]
Lenticel develops through the activity of
Lenticel develops through the activity of
If the heart wood region of plant is removed or decays
If the heart wood region of plant is removed or decays
The anatomy of springwood shows some peculiar features. Identify the correct set of statements about springwood.
$(a)$ It is also called as the earlywood
$(b)$ In spring season cambium produces xylem elements with narrow vessels
$(c)$ It is lighter in colour
$(d)$ The springwood along with autumnwood shows alternate concentric rings forming annual rings
$(e)$ It has lower density
Choose the correct answer from the options given below:
The anatomy of springwood shows some peculiar features. Identify the correct set of statements about springwood.
$(a)$ It is also called as the earlywood
$(b)$ In spring season cambium produces xylem elements with narrow vessels
$(c)$ It is lighter in colour
$(d)$ The springwood along with autumnwood shows alternate concentric rings forming annual rings
$(e)$ It has lower density
Choose the correct answer from the options given below:
- [NEET 2022]
The functional xylem of dicot tree is
The functional xylem of dicot tree is