Question

In plants, iron is absorbed in the form of_____.
A) $F{{e}^{+}}$
B) $F{{e}^{2+}}$
C) $F{{e}^{3+}}$
D) $F{{e}^{4+}}$

Answer 1

Nutrients are chemical substances used by plants for the growth and development. Iron is required by the plant, which is absorbed by the roots. It is a part of cytochromes and ferredoxin.

Complete answer: Iron (Fe) is known as a micronutrient, i.e., plants need it in lower quantities than primary or secondary macronutrients. It is very important for plant health and development. Of the micronutrients, iron is required in the greatest quantity and depends on the pH of the rising medium for its availability. All micronutrients, except molybdenum, become less available as the pH of the growing medium rises, but as the pH of the growing medium decreases, they become more available. For crops, the optimal pH range is primarily determined by their ability to acquire micronutrients. Iron gives catalase activation. It plays an important role in chlorophyll formation. In order to release steam, it participates in photosynthesis and in breathing. Iron consists of a flavoprotein portion. It is absorbed in the form of ferric ions and as opposed to other micronutrients, it is needed in larger quantities. It is often used in redox reactions due to the presence of two oxidation states. It also serves as a catalyst for chlorophyll synthesis. Plants absorb iron in the form of $F{{e}^{3+}}$ from the soil.
Hence, the correct answer is option C.

Note: Iron deficiency causes chlorosis of new leaves (leaves are yellow with green veins). Plant roots that are sick or exhausted from overwatering do not effectively take up nutrients, causing chlorosis. To reduce plant stress, it is necessary to allow the growing medium to dry and apply effective fungicidal drench if roots are diseased.