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  • Casparian strips are present inOption: 1 Passage cellsOption: 2 Endodermal cells other than

Casparian strips are present in

Option: 1

Passage cells


Option: 2

Endodermal cells other than passage cells


Option: 3

General cortical cells


Option: 4

Hypodermal cells


Answers (1)

best_answer

 

 

Endodermis or Starch sheath

  • It is the innermost layer of the cortex.
  • It is single layered.
  • The endodermal cells are compactly arranged.
  • The endodermal cells are vertically elongated and appear barrel-shaped in cross section. 
  • The endodermal cells are characterised by the presence of suberin in the form of bands or strips that are called casparian strips.
  • Lignin may also be present in the casparian strips.
  • The endodermal cells that lack casparian strips are called passage cells. These are present just opposite to the protoxylem.
  • Endodermis is absent in woody stem of dicot angiosperms and gymnosperms. 
  • Endodermis is absent in angiosperm leaves.
  • Endodermis behaves as water tight dam to check the loss of water and air dam to check the entry of air in xylem elements. 

TIP:

  • The cortex is homogenous in roots as the hypodermis is absent.
  • The term ‘ground tissue’ is used to refer to undifferentiated general cortex and hypodermis.
     

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The endodermal cells are characterised by the presence of suberin in the form of bands or strips that are called casparian strips.

Posted by

rishi.raj

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