nutrition_in_plantshhjj_with_images.pptx

NA

1. Nutrition in Plants Summary and Explanation

2. Introduction All living organisms need food for energy, growth, and repair. Key point: Plants make their own food; animals depend on plants.

3. Types of Nutrition Autotrophic: Plants make food using sunlight (photosynthesis). Heterotrophic: Organisms depend on others for food (animals, fungi).

4. Photosynthesis Overview Conversion of CO2 + water into glucose + oxygen using sunlight. Main site: Leaves (chloroplasts). CO2 + H2O + sunlight → C6H12O6 + O2

5. Requirements for Photosynthesis Sunlight (energy source), Chlorophyll (green pigment), Carbon dioxide (via stomata), Water (via roots).

6. Experiment: Sunlight Needed Destarch plant (keep dark 3 days), cover leaf part, expose to sunlight, test with iodine → blue-black = starch. Observation: Only exposed part shows starch.

7. Role of Chlorophyll & Stomata Chlorophyll traps sunlight; stomata enable gas exchange (CO2 in, O2 out) and transpiration.

8. Importance of Photosynthesis Produces food (glucose, starch), releases oxygen, maintains CO2/O2 balance. Without photosynthesis, life would not exist.

9. Synthesis of Proteins & Fats Carbohydrates used to make proteins and fats. Nitrogen source: soil bacteria (Rhizobium), fertilizers. Symbiosis: legumes + Rhizobium.

10. Other Modes of Nutrition Saprotrophs (fungi), Parasites (Cuscuta), Insectivorous plants (pitcher plant, Venus flytrap).

11. Symbiotic Relationships Mycorrhiza: fungus + plant roots. Lichen: alga + fungus, mutual benefit.

12. Recap & Key Takeaways Plants use sunlight to make food via photosynthesis, providing food & oxygen, with varied nutritional adaptations.

13. Thank You Understanding plant nutrition helps us appreciate the foundation of life on Earth.