Which of the following is the middle layer in the root apical meristem that gives rise to the
cortex?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Periblem
- Periblem is the middle layer in the root apical meristem that gives rise to the cortex.
- According to Histogen Theory, proposed by Hanstein, the shoot apex does not comprise a single apical cell or a group of meristematic cells that are responsible for the development of the whole plant body.
- The apical meristem consists of three distinct zones of meristematic cells called Histogens. They are:
- Dermatogen- It is the outermost layer and gives rise to the epidermis.
- Periblem- It is the middle layer present below the dermatogen that gives rise to cortex and endodermis.
- Plerome- It is the inner core that gives rise to vascular tissues and pith.