Question

8. Explain movement of water in the root.

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Answer 1

Explanation:

the movement can symplastic or apoplastic ,

symplastic is passive transport whereas apoplastic is active transport .

the movement requires energy as it has to move against gravitational force.

the root transports the water to lateral part of plant which distributes it accordingly.

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Answer 2

Answer:

(1) Root hairs absorb water by imbibition then diffusion which is followed by osmosis.

(2) As water is taken inside the root hair cell it becomes turgid i.e. increase in turgor pressure (T.P)

(3) Root hair cell has less D.P.D. but adjacent cortical cell has more D.P.D.

(4) The inner cortical cell has more osmotic potential so it will suck water from root hair cell.

(5) Root hair cell becomes flaccid and ready to absorb soil water.

(6) Water is passed on similarly in inner cortical cells.

(7) Water moves rapidly through loose cortical cells up to endodermis and through passage cells in pericycle.

(8) From pericycle due to hydrostatic pressure developed it is forced into protoxylem.