Question

The greatest contribution of root pressure may be to ​

Answer 1

Answer:

main part of the plant pressure

Answer 2

The greatest contribution of root pressure may be to ​"re-establish the continuous chains of water molecules in the xylem which often break under the enormous tensions created by transpiration."

• Vascular tissues of roots constantly transport mineral ions and water from the soil.
• This constant transport results in an increase in pressure of water flow within xylem tissue. This is called root pressure.
• The positive hydrostatic pressure generates a high push of water through capillaries like water columns.
• Without root pressure, it will only reach up to a small height in the stem of herbaceous plants.
• Thus root pressure is a weak force and is observed in the early morning and at night when transpiration is low.
• Transpiration is the main driving force, still, root pressure contributes to maintaining a continuous flow of water molecules through column channels.
• The gentle push is provided by the root pressure.

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