DEFINITIONS AND KEY POINTS FOR OBJECTIVES FOR Mineral uptake

TERMS DEFINITIONS
Clay Clay   is    an  inorganic   material.  It  consists  of

aluminium and silicon oxides.

Free space The term free space is used for the part of the plant

cell  andtissue   whereions  can  freely  move  by

  1. Itis   also  called  apparent  freespace
    (AFS).
Mass flow The in               of ions along with bulk anima of

water is called mass flow of ions.

Ion exchange The exchange of anions or cations of the cells %‘• ill) the ionS of the same and Ctilik alent charge of outer solution is called ion exchange.
Donnan equilibrium The equilibrium of ions between root cells and soil

solutionin the presence of fixed  ionsin the root
cells is called Donna]) equilibrium.

Con-tansport                The transport by which a substance indirectly drives

the active transport of several other solutes is called

con-transport.


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Antiprot                       In this case, the two transported molecules moves in
opposite direction.

Symport                      In this case, two molecurs move in the same direction

Essential                  ‘Me elements which are needed by the plants’ for

elements                   normal and healthy life are called essential

elements. Only 16 elements are essential elements.

 

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