The purification of water and nutrient salts in hydroponics is very important because of the following reasons:
1. Impure water contains impurities, which will interfere in the growth of plant and make the study for the essntiality difficult.
2. Impurities may be toxic to the plant.
3. Impurities may compete with other minerals.
4. Impurities may inhibit some enzymes.
Therefore, only pure water and nutrients should be taken for hydroponics.
Which of the following statements are true? If false, correct them.
1. Boron deficiency leads to stout axis.
2. Every mineral element that is present in the cell is needed by cell.
3. Nitrogen as a nutrient is highly immobile in the plants.
4. It is very easy to establish the essentiality of micronutrients, because they are required in traces.
1. True. Boron deficiency leads to stout axis.
2. False. Every mineral element present in the cell is not needed by the plant.
3. False. Nitrogen is highly mobile.
4. False. It is very difficult to establish essentiality of micronutrients because they are required in traces.
Absorption of minerals : The minerals are absorbed by the plants in two ways.
1. Passive absorption through the apoplast pathway - The movement of ions generally take place through the ion channels that is the transmembrane protein that function as selective pores. It does not require energy.
2. Active absorption through the symplast pathway - It requires the expenditure of energy. The ions are slowly into the inner space.
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