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?

Step-by-step solution

Cu , Mn and Fe Micronutrient elements affect both photosynthetic and mitochondrial electron transport as follows: Iron (Fe) - It is an important constituent of a protein involved in the transfer of electrons like ferredoxin and cytochromes. Manganese(Mn)- It activates enzymes of respiration, photosynthesis and nitrogen metabolism. Copper ( Cu ) - It is a component or activator of plastocyanin, cytochrome oxidase, RuBP carboxylase.