Question:

The deficiencies of micronutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport?

Updated On: Jul 21, 2024
  • Co, Ni, Mo
  • Ca, K, Na
  • Mn, Co, Ca
  • Cu, Mn, Fe.
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The Correct Option is D

Solution and Explanation

Iron is mainly available in the ferrous form and it is absorbed in the ferric form, also. It is a part of catalases, peroxidases, cytochromes etc. and plays a role in electron transport system in photosynthesis. Manganese is absorbed by the plants when it is in the bivalent form. Manganese participates in the photolysis of water in pigment system II during photosynthesis and thus it helps in the electron transport from water to chlorophyll. Copper is absorbed on the clay particles as divalent cations, from where it can be absorbed by the plants by exchange mechanism. It is constituent of plastocyanin which takes part in electron transport during photosynthetic phosphorylation.
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Concepts Used:

Mineral Nutrition

The naturally occurring inorganic nutrient found in the soil and food that is necessary for the proper functioning of animal and plant bodies is defined as nutrition. Minerals are vital elements essential for the body.

Read More: Mineral Nutrition

Role of Nutrients:

  1. Balancing function
  2. Maintenance of osmotic pressure
  3. Influencing the pH of the cell sap
  4. Construction of the plant body
  5. Catalysis of the biochemical reaction
  6. Effects of Toxicity