Transport proteins of endodermal cells are control points where a plant adjusts the quantity and types of solutes that reach the xylem. Root endodermis is able to actively transport ions in one direction only because of the layer of
Transport proteins of endodermal cells are control points where a plant adjusts the quantity and types of solutes that reach the xylem. Root endodermis is able to actively transport ions in one direction only because of the layer of
The correct option is B Suberin
The inner
most part of the cortex in root and dicot stem is endodermis. it is single
layered. Cells are barrel shaped and thick walled. On the radial walls and
tangential walls, ligno suberised thickenings are present. These are called
Casparian thickenings. Some of the endodermal cells lack casparian bands. These
are called passage cells. These cells are present opposite to the protoxylem
cells. Endodermis acts as check point, and prevents the outflow of water and minerals
from the stele into cortex, and also acts as a barrier in the inflow of water
and mineral from cortex and stele either by active methods or passive methods.
So,
the correct option is ‘Suberin’
The inner most part of the cortex in root and dicot stem is endodermis. it is single layered. Cells are barrel shaped and thick walled. On the radial walls and tangential walls, ligno suberised thickenings are present. These are called Casparian thickenings. Some of the endodermal cells lack casparian bands. These are called passage cells. These cells are present opposite to the protoxylem cells. Endodermis acts as check point, and prevents the outflow of water and minerals from the stele into cortex, and also acts as a barrier in the inflow of water and mineral from cortex and stele either by active methods or passive methods.
So, the correct option is ‘Suberin’
