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Question

How are the minerals absorbed by plants?

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Solution

  • The mineral concentration within the soil is very low, therefore, it is dissolved in water and move around the soil in solution.
  • Plants absorb the minerals from the soil with the help of root hairs.
  • The minerals are absorbed in the form of ions.
  • The mineral absorption by plant roots take place in two phases-
1) Intial phase- The rapid uptake of ions into outer free spaces of the plant cells (apoplast).
  • The free spaces include the intercellular spaces and the cell wall.
  • The entry of ions into the outer space is passive absorption, i.e no energy is required.
2) Metabolic phase- The mineral ions diffuse into the cell cytoplasm and vacuoles (symplast).
  • The entry of ions into the cell requires energy, therefore, is called active absorption.

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