ex2: Cameron 2008

Question 1

What was the study species?

Answer 1

green leaved orchid Goodyera.repens

Question 2

what is supplied by G.repens and in return for what?

Answer 2

C to the fungal partner in return for N

Question 3

what does the myc fungus capture and transfer to orchid protocorms?

Answer 3

inorganic P

Question 4

what does the fact that most adult orchids have coarse roots mean?

Answer 4

depend on mycorrhiza for mineral nutrient uptake

Question 5

what transports the P radiotracer?

Answer 5

external mycelium growing from the green orchid

Question 6

after 7 days of exposure how much P was transported over the diffusion barrier to plants?

Answer 6

10%

Question 7

what is the relationship between the orchid and its myc partner?

Answer 7

mutualistic because orchid can obtain significant P

Question 8

what is it likely the orchids access to will outweigh what cost?

Answer 8

access to N and P from fungus outweighs net N cost of maintaining symbiont