Why do plants require magnesium?

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Question

(B) Magnesium $(Mg^{2+})$ is an essential macronutrient for plants. It is a central constituent of the chlorophyll molecule,which is the primary pigme

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Chlorophyll synthesis

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(B) Magnesium $(Mg^{2+})$ is an essential macronutrient for plants. It is a central constituent of the chlorophyll molecule,which is the primary pigment responsible for photosynthesis. Without magnesium,plants cannot synthesize chlorophyll,leading to chlorosis (yellowing of leaves). Additionally,it acts as a cofactor for many enzymes involved in phosphate metabolism and $DNA$/$RNA$ synthesis.

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