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with the help of diagram explain two pathways of water across the root cells.

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The two pathways of water movement across the root cells are:
  1. Apoplast Pathway: Apoplast is a system of adjacent cell walls that are continuous, except at the casparian strips of the endodermis. Movement occurs through these intercellular spaces or walls of the cells, without entering the cytoplasm.
  2. Symplast Pathway: Symplast is a system of interconnected protoplasts.Water enters the cell through the cell membrane and travels intercellularly through plasmodesmata.

Diagram:


                  
 
Hope this information will clear your doubts about the Apoplast and Symplast Pathway.
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Apoplast Pathway:

Movement occurs through the intercellular spaces or walls of the cells, without entering the cytoplasm.  Movement is fast.  Most of the water flow in roots occurs via apoplast, except at the casparian strip.Symplast pathway:

·         Water enters the cell through the cell membrane and travels intracellularly through plasmodesmata. Movement is slow. At the casparian strip region, water moves through the symplast. 

·         Most of the water enters through apoplast pathway, endodermis has casparian strips which are made of suberin, it is impervious to water, so water enters the symplast. 

For diagrams, refer page 184 & 185 of NCERT Biology Textbook.
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