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Ch. 37 Warm-Up

Ch. 37 Warm-Up. What conclusions should we draw from van Helmont’s experiment? Where would you expect a deficiency of a relatively immobile element to be seen first in a plant? (pg. 756) What are the possible consequences of selling off water rights to cities and developments?. Chapter 37.

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Ch. 37 Warm-Up

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  1. Ch. 37 Warm-Up • What conclusions should we draw from van Helmont’s experiment? • Where would you expect a deficiency of a relatively immobile element to be seen first in a plant? (pg. 756) • What are the possible consequences of selling off water rights to cities and developments?

  2. Chapter 37 Plant Nutrition

  3. What you need to know: • Mutualistic relationships between plant roots and the bacteria and fungi that grow in the rhizosphere help plants acquire important nutrients. • Nonmutualistic nutritional adaptations enable plant survival in adverse habitats.

  4. Nutritional Requirements Essential element: required for plant to complete life cycle and produce another generation • Macronutrients (large amounts): CHNOPS + K, Ca, Mg • Nitrogen = most important! • Micronutrients (small amounts): Fe, Mn, Zn, Cu, etc.

  5. Mutualistic Relationships: • Rhizobium bacteriasupply nitrogen at roots (fix atmospheric N2 to usable N) • Plant supplies sugar & amino acids • Mycorrhizae (plant + fungus)

  6. Role of soil bacteria in the nitrogen nutrition of plants

  7. Unusual nutritional adaptations: epiphytes, parasitic plants, canivorous plants Epiphyte: grow on another plant, absorb H2O from rain through leaves

  8. Parasitic Plants: not photosynthetic; absorb sugar and minerals from living hosts

  9. Carnivorous Plants: photosynthetic, but obtain some nitrogen and minerals by digesting small animals

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