Nutrition in Plants

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  1. a.      Plants are __
                                                                  i.      What does htis mean?
                                                                ii.      Necessary:
    1.      _
    • autotrophs-photosynthesis
    • Make their own food from inorganic materials through photosynthesis
    • Water, CO2, and minerals
  2. Minerals
    - how many
    - how will they enter
    - what part of plant
    - exception
    •                                                               i.      13 minerals that are necessary for the plant to produce food and those thirteen minerals come from the soiled (dissolved rock)
    •                                                               i.      They will enter the plant through the roots and then travel throughout the plant     
    •                                                             ii.      Generally through leaves, roots, or stems, but mostly leaves
    •                                                           iii.      There is one that does not come from the soil, Nitrogen
  3. Macronutrients: __
    • mineral needed in large quantities
    • primary and secondary nutrients
  4. Primary Nutrients
    • 1.      Needed so much that it has to be replenished by the soil
    • a.      Used in such large quantities that they are used up quickly and have to be replenished
    • 2.      Nitrogen, K, P
  5. Secondary Nutrients
    • 1.      Used in large quantities, not as large as quantities, and generally don’t have to be replenished as quickly
    • 2.      Calcium, Mg, S
    • 3.      Lime will replenish secondary macronutrients
  6. Micronutrients
    •                                                               i.      Needed in very minute quantities but absolutely necessary
    • 1.      Very rare that they’d be depleted from the soil
  7. Composition of Soil
    •                                                               i.      Mineral (inorganic matter)
    •                                                             ii.      Organic matter
    • iii. pore spaces
  8. Explain organic matter
    • 1.      All the decaying and dead material; anything that’s living
    • 2.      Lot of organic material in soil
    • 3.      Humus refers to the partially decayed organic matter
  9. Explaiin pore spaces.
    •                                                               i.      Pore spaces—containing air and water
    • 1.      Earthworms, as they burrow, are constantly lifting and softening the soil so that the spaces are kept open
    • 2.      Essential because oxygen is in soil, not only for plants, but organisms
    • a.      Water necessary for uptake by minerals
  10. Nitrogen
    • a.      a MACRONUTRIENT
    •                                                               i.      All minerals from weathered rock except for nitrogen
  11. Where does nitrogen come from?
    1.      Nitrogen as nitrogen cannot be used by the plantà nitrogen-fixating bacteria that will take atmospheric nitrogen and use it to convert it to a usable form that can be used by the plant= NITROGEN FIXATION
  12. Nitrogen fixation
    •                                                               i.      Not all bacteria can fix nitrogen; there is a group of them
    •                                                             ii.      One group of nitrogen-fixing bacteria is called Rhizobia
    • 1.      Capable of fixing nitrogen because they have the enzymes needed to fix it
  13. What is one of the enzymes involved in nitrogen fixation?
    • a.      One of the enzymes is nitrogenase
    •                                                                                                                                       i.      Enzyme present in nitrogen-fixing bacteria that is necessary to convert atmospheric nitrogen to a usable form 
  14. What happens with nitrogen fixation?
    •                                                               i.      What happens is that the rhizobium is going to form a symbiotic relationship with the plant
    • 1.      Plants that are symbiotic are legumes, which are located in the soil in order to fix nitrogen
    • a.      Legumes form a symbiotic relationshipwith the rhizobium
  15. Explain the symbiotic aspect of nitrogen fixation.
    • a.      Symbiosis
    •                                                               i.      Bacteria infect the root through the root hairs
    •                                                             ii.      Once in root, they multiply
    • 1.      Need to be inside plant in order to multiply
    • a.      They are getting place where they can proliferate, while the plant gets fixed nitrogen
    •                                                           iii.      Once in, they form nodules
    •                                                           iv.      As they form nodules, they are fixing nitrogen that will be dumped out of soil that will be expelled from the organism
    • b.      Usable nitrogen in fertilizer
Card Set:
Nutrition in Plants
2013-02-11 22:30:46
BIO 220

Nutrition and Digestion
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