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Plant Physiology > Exam 3 > Flashcards

Exam 3 Flashcards

1
Q

Another name for Drought

A

Osmotic stress

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2
Q

Perception of stress

A

Lack of turgor pressure
Freezing
Salinity of soil

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3
Q

What happens once stress is perceived by the plant

A

Production of aba, ethylene that start signal transduction

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4
Q

What does signal transduction end up changing because of signal transduction?

A

Transcription

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5
Q

What increase during transcription?

A

Lea proteins

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6
Q

Where are lea proteins found?

A

Seeds

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7
Q

2 types of lea proteins

A

Cadheeins

Chaperonins

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8
Q

Dehydrins

A

Unorganized associate with phospholipid membrane and stabilize it

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9
Q

Chaperonins

A

Engulf unfolded protein and allow it to fold

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10
Q

What also happens when transcription changes?

A

Increase in compatible spouted

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11
Q

Examples of compatible allures

A

Sugars
Amino acids
Proline
Sorbitol

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12
Q

Outcomes of changes in transcription (3)

A

Osmoregulation
Stress signaling
Macromolecule protection

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13
Q

Trehalose

A

Sugar that act like dehydrin proteins

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14
Q

What happens to the membrane when chilling occurs?

A

Membrane becomes leaky

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15
Q

Transition temperature

A

Membrane goes from liquid to gel. Low temp where membrane lose its fluidity

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16
Q

No double bonds and membrane, chilling tolerance

A

Rigid membrane not tolerant to chilling

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17
Q

More double bonds and membrane, chilling tolerance

A

More fluid and tolerant to chilling

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18
Q

Saturated and unsaturated chilling tolerance

A

Unsaturated chilling tolerant

Saturated chilling intolerant

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19
Q

Desaturases

A

Enzymes from chilling tolerant plant allow unsaturation

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20
Q

Acclimation

A

Plants prepare for the cold due to changes in gene expression

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21
Q

Supercool

A

Plants can go below freezing temperature of water without ice forming in the cytosol

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22
Q

Ice crystals in cytosol

A

Kill the plant and denature proteins

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23
Q

Ice crystals in cell wall

A

Okay

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24
Q

Mechanism for supercooling

A

Adding a solute

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25
Q

Agriculture today

A

Suit the land to the plant

26
Q

Land institute goal

A

Suit the plant to the land

27
Q

Goal of land institute

A

Perennial poly culture

28
Q

5 things there trying to breeding in?

A 
Wheatgrass 
Sunflower 
Bundleflower 
Wheat
Sorghum
29
Q

Biggest problem with breeding sorghum

A

Winter hardiness

30
Q

Which yield is larger Annual or perennial

31
Q

Whose root system is largest annual or perennial

32
Q

Which sequesters more carbon annual or perennial

A

Perennials

33
Q

Bundleflower goal

A

Increase protein and replace soybean

34
Q

Reach for water better annual or perennial

35
Q

Controlling soil erosion annual or perennial

36
Q

Resilient to abiotic stresses annual or perennial

37
Q

Better at water contamination

38
Q

What do plants measure 4

A

Intensity
Duration
Direction
Quality

39
Q

What are nonphotosynthetic photoreceptors

A

Light absorbing molecules

40
Q

Photochrome absorbs

A

Red and far red

41
Q

Cryptochrome absorbs

42
Q

Phototropin absorbs

43
Q

Which light triggers germination?

44
Q

Skotomorphogenic

A

Dark grown

45
Q

Photomorphogenic

A

Light grown

46
Q

Etiolated

A

Dark grown

47
Q

Describe a etiolated plant

A

Not making chlorophyll
Apical hook
Small leaves
Tall

48
Q

Short day plants

A

Tobacco
Soybean
Strawberry
Rice

49
Q

Long day plants

50
Q

Day neutral plants

A

Cucumbers

Tomatoes

51
Q

Photoreversible

A

Phytochrome can absorb red and far red light

52
Q

Peak for PR

53
Q

Peak for PFR

54
Q

Active form of phytochrome

55
Q

Inactive form of phytochrome

56
Q

PFr at night

A

Flip to pr form

57
Q

Dark reversion

58
Q

High irradiance response

A

Stem elongation

59
Q

Low fluency response

A

Seed germination

60
Q

Fluence vs irradiance

A

Fluence measure photons

Irradiance time

Plant Physiology (3 decks)

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