BIOL 211 – CELLULAR AND ORGANISMAL BIOLOGY
Lecture Outline for
Topic: plant nutrition
Chapter 27 section 27.1
Figures used in lecture: 27.1, 27.2, 27.5
used in lecture that are not in your textbook REQUIRES POWER POINT
REQUIRES POWER POINT
Define/explain: essential nutrients, macronutrients, micronutrients, nitrogen fixation, symbiosis, mutualism, legumes, rhizobia, epiphytes, parasitic plants, carnivorous plants
You should be able to:
1. Describe the three properties of an essential nutrient
2. Understand the difference in function of the macronutrients and the micronutrients
3. Explain why nitrogen fixation is important to all organisms in the biosphere
4. Explain how each member of the mutualistic relationship between plants and rhizobia benefits.
5. Define and give examples of alternate mechanisms plants use to obtain nutrients such as epiphytic plants, carnivorous plants, and parasitic plants.
Today’s Lecture (
Essential nutrient –
1. required for growth or reproduction
2. no other element can substitute for it
3. required for a specific structure or metabolic function
Q. Why do organisms need nitrogen?
Nitrogen in atmosphere is N2.
Very few organisms possess the enzyme required to break N2.
Eg., Rhizobium sp. (aka rhizobia)
Form an association with the roots of legumes
Alternative Mechanisms of Plant Nutrition