Question

Passage cells are thin walled cell found in:

• A. Endodermis of roots facilitating rapid transport of water from cortex to pericycle.
• B. Phloem element that serve as entry points for substances for transport to the other plant parts.
• C. Testa of seeds to enable emergence of growing embryonic axis during seed germination.
• D. Central region of style through which the pollen tube grows towards the ovary.

Answer 1

The correct option is A Endodermis of roots facilitating rapid transport of water from cortex to pericycle.

In roots, endodermis is the innermost layer of cortex. Some of the endodermal cell present opposite to the xylem patch are thin walled and are called passage cell or transfusion cells. Passage cell helps in transfer of water and dissolved salt from the cortex directly into the xylem and ultimately to the pericycle.