L5.1 Proteobacteria_Alphaproteobacteria Flashcards

(32 cards)

1
Q

stands out for its
vast diversity in habitat, metabolism, and
lifestyle, being the largest bacterial
phylum

A

Proteobacteria

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2
Q

What are the metabolic strategies of proteobacteria?

A

Photosynthesis
Chemo-heterotrophy
Nitrogen fixation

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3
Q

What are the classes under proteobacteria?

A

Alpha
Beta
Gamma
Delta
Epsilon
Zeta

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4
Q

the most dominant
in the oligotrophic proteobacteria.

A

Alphaproteobacteria

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5
Q

Unusual metabolic modes of a-proteobacteria

A

Methylotrophy
Chemolithotrophy
Ability to fix nitrogen

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6
Q

Methylotrophy

A

grow using methane (methylobacterium)

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7
Q

Chemolithotrophy

A

electron sources from inorganic compounds (nitrobacter)

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8
Q

Nitrogen fixer example

A

Rhizobium

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9
Q

What are the orders under Alphaproteobacteria

A

Rhizobiales
Rickettsiales

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10
Q

What are the genera under Rhizobiales

A

Bartonella, Methylobacterium
Pelagibacter
Rhizobium
Agrobacterium

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11
Q

Majority of the a-proteobacteria are under what order?

A

Rhizobiales

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12
Q

Describe the order rhizobiales

A

phototrophs, chemolithotrophs, symbionts, nitrogen-fixing bacteria

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13
Q

a polyphyletic collection of genera, form root nodules and fix
nitrogen in symbiotic association with
leguminous plants

A

Rhizobia

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14
Q

Genus under Rhizobiales

A

Rhizobium
Agrobacterium
Methylobacterium
Bartonella
Pelagibacter

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15
Q

Rhizobium

A

Forms root nodules and fixes nitrogen with leguminous plants

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16
Q

Agrobacterium

A

Crown gall disease, pathogenic

17
Q

Methylobacterium

A

Capable of using methane as carbon source, and can be cultivated in vitro with methanol

18
Q

Bartonella

A

Causes trench fever, cat scratch diseases

arthopod vectors, fastidious

19
Q

species under Bartonella

A

quintana, henselae, bacilliformis

20
Q

Pelagibacter

A

photic zone of ocean
oligotroph, obligate aerobic, chemoorganotroph

21
Q

Describe the order rickettsiales

A

-intracellular parasites and mutualist with arthropods

22
Q

How do you cultivate rickettsiales?

A

cultivated on host cells such as chicken or tissue culture since they are intracellular

23
Q

Describe Rickettsia

A

-cause typhus, Rocky mountain spotted fever

24
Q

vectors of rickettsia diseases

A

arthropod diseases such as ticks, fleas, lice and mites

25
metabolic profile of rickettsiales
- oxidize amino acids, host-reliant for metabolites
26
How are viruses similar to rickettsia?
replicate in the cytoplasm of the host cell and lyse to proliferate but they do not use the host's ribosomes and nutrients since they have their own
27
Transmission cycle of Rickettsia
tick-human-arthropod
28
What are wolabachia
-intracellular parasites of arthropods
29
Effect of wolabachia in their hosts
induces pathenogenesis, male killing and feminization.
30
species of wolbachia that colonizes the insect eggs
Wolbachia pipientis
31
How Wolbachia affects mosquitoes
female mosquitoes with wolbachia cannot transmit dengue.
32
Application of wolbachia
biocontrol for dengue in disease vector control