Fungi - Exam 2

Question 1

What is a fungus

Answer 1

Organism with cell walls with chitin and cellulose, decomposers, found everywhere

Question 2

Characteristics and differences from plants?

Answer 2

Characteristics: Eukaryotic, multicellular organisms, generally microscopic and filamentous, absorptive nutrition
No stems, leaves, roots, or chlorophyll
Has rhizoid can develop, like roots

Question 3

Fungal nutrition

Answer 3

Absorptive nutrition, Biotrophs (obligate) or saprophytes
Necrotrophs (kills tissue on the host plant)
Hemibiotrophs
Facultative saprophyte
Facultative parasite

Question 4

Dissemination

Answer 4

Active: forcible spore discharge
Passive: wind, through spores
Water, insects or other things
Protoplasts show internal streaming but non-motile mycelium

Question 5

Morphology

Answer 5

Thallus, mycelium, compartmentalized, no stems or phylum

Question 6

Growth and reproduction

Answer 6

Spores, germ tube → intercellular or intracellular
Types of spores: sexual and asexual
Sexual (teleomorph): ascospore, basidiospores
Asexual (anamorph): conidia, zoospores, sporangiospores

Question 7

Penetration into the host

Answer 7

Natural Openeing

Direct or mechanical force

Question 8

Symptoms

Answer 8

Cankers, blight, leaf blights, abnormal growth, fruit rot, seedling rot/damping off, etc

Question 9

Isolation and identification

Answer 9

Isolation: moist chamber, plating, culture media

Question 10

Management of Spetoria Leaf Blight

Answer 10

deep plowing of stubble

plant disease free seed

Question 11

Downy mildew

Answer 11

• member of the oomyvetes - not a true fungus - water
• obligate parasites - need host
• pennant signs: spangioform: produce spores

Question 12

Powdery Mildew

Answer 12

• member of ascomycetes
• obligate parasites
  Prominent signs??

Question 13

Phylum Ascomycota

Answer 13

Subphyla

• Taphinomycontia
• Saccharomycontina
• Pezizonmycontia

Question 14

Phylum Basidiomycota

Answer 14

Subphyla - need third

• Vstilaginomycota
• Puccionmycontina: rusts
• Agaricomycotina

Question 15

Sexual Spores

Answer 15

Ascospores -

Basidiospores

Question 16

Asexual Spores

Answer 16

conidia
zoospores
chlomydispores
spranisouspsores

Question 17

Spore

Answer 17

Unit of Reproduction

Question 18

Sexual reproduction

Answer 18

3 Three Stages:
Plasmogamy
Karyogamy
Meiosis

Question 19

Spore stages of rust

Answer 19

Five Spore States → Macrocyclic rust
No urediniospores → demicyclic rust
No urediniospores nor aeciospores → microcyclic rust