Lab #10: Intro to Maize Flashcards

1
Q

What is the scientific name for maize?

A

Zea Mays

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2
Q

What is the phylum of maize?

A

Mangiophylota

–> AKA “ANGIOSPERMS”

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3
Q

What is the CLASS of maize?

A

Monocotyledon

–> They are monocots

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4
Q

What are the key features of monocots? (6)

A

1) Seeds with ONE cotyledon (embryonic leaf)
2) Flowers have 3 floral parts or multiples of 3
3) Veins are arranged parallel in leaves
4) Vascular bundles are found scattered throughout the stem
5) Fibrous roots
6) Have pollen

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5
Q

What is the main ancestor of maize?

A

Teosinte (A grass plant)

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6
Q

How many chromosome PAIRS (2n) does maize have?

A

TEN

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7
Q

How big is the maize genome (In terms of # genes and computer storage of genome)

A

2.4 GB

–> 42,000-56,000 genes

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8
Q

Is small or large leaf angle favorable for maize growth?

WHY?

A

SMALL leaf angle!

The smaller the leaf angle, the less each plant’s leaves shade those of another plant’s = we can pack the plants closer together (more yield per area) sunlight can be better intercepted by each plant with a narrow upright structure

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9
Q

Does maize grow better in high or low densities

A

HIGH densities!

More plants in a smaller space maximize the use of sunlight and resources like water and nutrients, resulting in greater biomass production

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10
Q

What is the ligule?

A

A small, thin, membrane-like outgrowth located at the junction where the leaf blade meets the leaf sheath

–> An outgrowth of the SHEATH! (coming from stem)

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11
Q

What is an auricle (plants)?

A

A small, claw-like appendage at the base of the leaf blade that often clasps around the stem

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12
Q

What is the blade?

A

The flat, expanded part of a leaf, essentially the main surface area of the leaf

–> Area where most photosynthesis occurs

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13
Q

What is the sheath?

A

Projection of a leaf that wraps around the STEM

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14
Q

What is the midrib?

A

The central vein or ridge of a leaf

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15
Q

What is the margin (of maize)?

A

The edge of the leaf blade, essentially the outer perimeter of the leaf

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16
Q

What is the ligule REGION?

A

The boundary between sheath and blade of a given leaf

AKA “Hinge region”

17
Q

What area of the maize plant determines the leaf angle?

A

The ligule (“hinge”) region

–> Allows the maize leaf to orient at different angles at the boundary of the leaf blade and sheath.

18
Q

aDaxial vs aBaxial

A

aDaxial Side = “Upper surface” (Side of leaf facing up to the sun) “Think D = daytime = sun”

aBaxial Side = “Lower surface” (side of leaf facing away from sun, down/shaded side

19
Q

Within the images of the maize plants we took, how was the plant supposed to be oriented?

A

1) SECOND leaf on the RIGHT side
2) Plant completely contained within the black paper
3) Leaves lie NATURALLY curved!

20
Q

What were the parameters of a good maize image? (7)

A

1) SECOND leaf on the RIGHT side
2) Plant completely contained within the black paper
3) Leaves lie NATURALLY curved!
4) Not blurry
5) All of plant is contained within black paper
6) Ruler present
7) Image taken from above and NOT at an angle