Symbioses and Pathogenesis

Question 1

some species of fungi form close relationships with ?

Answer 1

plant roots

Question 2

how is called the association btw fungi and plant roots?

Answer 2

mycorrhizae

Question 3

Mycorrhizae help plant roots to ?

Answer 3

obtain phosphorus

Question 4

fungi obtain his nutrients from ?

Answer 4

the plant roots

Question 5

What’s lichen?

Answer 5

Association btw fungi and algae/cyanobacterium

Question 6

deux type of mycorrhizae?

Answer 6

• Ectomycorrhizae

- Endomycorrhizae

Question 7

What’s Ectomycorrhizae?

Answer 7

form a sheat around the plant root but does not penetrate it

Question 8

What’s endomycorrhizae?

Answer 8

the fungal hyphae is embeddedin the plant root

Question 9

fungi can cause what in plants and animals?

Answer 9

disease

Question 10

many fungal plant pathogen form specialized hyphae?

Answer 10

haustoria

Question 11

the haustoria is for?

Answer 11

penetrate the plant cells and consume the cytoplasm

Question 12

What in humans, range in severity from ‘’ athelete’s foot’’ to histoplasmosis(really severe infection) ?

Answer 12

Mycoses

Question 13

Qui reccourent un major risk of mycoses?

Answer 13

those with a weak immune system,immunosupression is a major risk

Question 14

most fungi reproduce by asexual means (three forms)

Answer 14

1. Growth and spread of hyphal filaments
2. Asexual production of spores
3. Simple cell division (budding yeast)

Question 15

Some fungi produces spores as result of ?

Answer 15

-Sexual reproduction

Question 16

sexual spores form from ?

Answer 16

-fusion of two haploid cells to form a diploid cell

Question 17

what happens to the diploid cell ?

Answer 17

undergoes meiosis to produce a haploid spores

Question 18

how are named the haploid spores?

Answer 18

ascospores,basidiospores,zygospores

Question 19

the name of the spore depends?

Answer 19

on the type or organisms

Question 20

spores are resistant to?

Answer 20

drying,heating,freezing and chemicals

Question 21

spores are important for?

Answer 21

increasing genetic diversity in the population

Question 22

yeast?

Answer 22

unicellular fungi

Question 23

yeast have ?

Answer 23

spherical to oval,

Question 24

yeast cell divide through?

Answer 24

budding

Question 25

how does saccharomyces cerevisiae reproduces (yeast)?

Answer 25

sexual reproduction

Question 26

mating types in saccharomyces cerevisiae?

Answer 26

a and alpha

Question 27

a and alpha are?

Answer 27

haploid,they can come in contact and mate with each other(cell fuse plus nuclear fusion)

Question 28

after alpha and a mate with each other the cell can?

Answer 28

undergo asexual reproduction

Question 29

after sexual reproduction they undergo?

Answer 29

• meosis(form ascospores)

- germination