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Nutrition in Plants for Class 12

📑 5 slides 👁 39 views 📅 3/11/2026
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Introduction to Plant Nutrition

Plants synthesize food via photosynthesis using sunlight

Introduction to Plant Nutrition
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Photosynthesis Process

  • Occurs in chloroplasts containing chlorophyll pigment
  • Light reaction (grana) & dark reaction (stroma) phases
  • 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ (photosynthesis equation)
Photosynthesis Process
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Mineral Nutrition

  • 16 essential elements: C,H,O,N,P,K etc. (macro)
  • Fe,Mn,Zn etc. required in traces (micro)
  • Nitrogen fixation by Rhizobium bacteria in roots
Mineral Nutrition
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Heterotrophic Nutrition

  • Parasitic plants (Cuscuta) derive food from hosts
  • Insectivorous plants (Venus flytrap) digest insects
  • Saprophytes (fungi) absorb nutrients from dead matter
Heterotrophic Nutrition
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Summary & Importance

  • Plants form base of food chains in ecosystems
  • Human agriculture depends on plant nutrition knowledge
  • Understanding helps improve crop yields & soil management
Summary & Importance
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