Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
What are mycorrhiza? |
Partnership between plant roots and different species of fungi |
|
|
How do these plants uptake nutrients, and is it effective? |
-direct nutrient uptake through roots, inadequate for many plants |
|
|
What are 4 main nutrients that diffuse in soil? list slowest to fastest |
Phosphate, ammonium, potasium, nitrate |
|
|
Whats the difference between phosphate being transported via mycorrhizal hyphae vs diffusion through soil? |
mycorrhizal hyphae are 1000x faster |
|
|
how do the fungus benefit? |
carbs from the trees |
|
|
how do the plants benefit? |
-increased nutrition in infertile conditions -increased uptake of P, Zn, Cu, N, K -increase water uptake -increase resistance to environmental changes
|
|
|
how do the hyphae do to make them faster/better? |
chemically increase solubility of nutrients
|
|
|
what are/is mycotrophy? |
the normal means for nutritional uptake uses mycorrhizal aid necessary for some plants
|
|
|
how does mycotrophy help plants? |
increases volume of soil occupied by roots increases resistance to environmental factors improves water uptake |
|
|
describe what fungal hyphae look like |
branching root system |
|
|
hypha size relative to root hair? |
1/10th diameter |
|
|
how do they increase surface area? |
pushes into available nutrients and makes more available to root hairs |
|
|
what are the two main types of mycorrhizae? |
endo and ecto |
|
|
how are they different? |
endo- arbuscle branching increases surface area - looks poodle-ish, stays w/in layered epidermis ecto - more of a tree branching shape, pokes out of epidermis |
|
|
Recap? |
plants gain easier access to nutrients/water fungus gains food supply and avoids competition |
