Lecture AP Biology Chapter 37 Plant nutrition

After studying this chapter you will be able to understand: 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.

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 Plant Nutrition 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  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 Mutualistic Relationships: Rhizobium bacteria supply nitrogen at roots (fix atmospheric N2 to usable N) • Plant supplies sugar & amino acids Mycorrhizae (plant + fungus) Role of soil bacteria in the nitrogen nutrition of plants Unusual nutritional adaptations: epiphytes, parasitic plants, canivorous plants Epiphyte: grow on another plant, absorb H2O from rain through leaves Parasitic Plants: not photosynthetic; absorb sugar and minerals from living hosts Carnivorous Plants: photosynthetic, but obtain some nitrogen and minerals by digesting small animals .. .Chapter 37 Plant Nutrition What you need to know: Mutualistic relationships between plant roots and the bacteria and fungi that grow in the rhizosphere help plants acquire important... usable N) • Plant supplies sugar & amino acids Mycorrhizae (plant + fungus) Role of soil bacteria in the nitrogen nutrition of plants Unusual nutritional adaptations: epiphytes, parasitic plants,... important nutrients  Nonmutualistic nutritional adaptations enable plant survival in adverse habitats  Nutritional Requirements Essential element: required for plant to complete life cycle and