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Question 7

How are the minerals absorbed by the plants?

Answer

The absorption of soil nutrients by the roots of plants occurs in two main phases – apoplast and symplast.



During the initial phase or apoplast, there is a rapid uptake of nutrients from the soil into the free spaces of plant cells. This process is passive and it usually occurs through trans-membrane proteins and ion-channels.

In the second phase or symplast, the ions are taken slowly into the inner spaces of the cells. This pathway generally involves the expenditure of energy in the form of ATP.

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