Nutrition in Plants Flashcards

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1
Q

Oxygen + Glucose

A

Carbon dioxide + Water in the presence of light

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2
Q

Factors limiting rate of photosynthesis

A

Light intensity, carbon dioxide concentration (normally) and temperature (enzymes can denature)

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3
Q

Cuticle

A

Reduces water loss by evaporation and acts as a barrier to the entry of disease-causing microorganisms

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4
Q

Upper epidermis

A

Relatively transparent to allow light to pass through

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5
Q

Palisade mesophyll

A

Long, narrow cells containing hundreds of chloroplasts, close to the source of light and main site of photosynthesis

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6
Q

Spongy mesophyll

A

Still photosynthesises though with fewer chloroplasts, they form the main gas exchange surface

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7
Q

Air space

A

Allows gases to diffuse in and out

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8
Q

Use of nitrate

A

Making amino acids, proteins, chlorophyll, DNA and other compounds

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9
Q

Nitrate deficiency symptoms

A

Limited growth of plant; Older leaves turn yellow

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10
Q

Use of phosphate

A

Making DNA and other compounds; Part of cell membranes

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11
Q

Phosphate deficiency symptoms

A

Poor root growth; Younger leaves turn purple

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12
Q

Use of potassium

A

Needed for enzymes for respiration and photosynthesis to work

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13
Q

Potassium deficiency symptoms

A

Leaves turn yellow with dead spots

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14
Q

Use of magnesium

A

Part of chlorophyll molecule

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15
Q

Magnesium deficiency symptoms

A

Leaves turn yellow

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16
Q

Describe an experiment to measure the effects of limiting factors upon photosynthesis

A
  1. Remove leaf
  2. Dewax in boiling water for 30s
  3. Remove colour in boiling ethanol (turn off Bunsen burner)
  4. Wash with cold water
  5. Test by adding iodine solution
  6. Vary limiting factor (use bell jar containing soda lime to remove carbon dioxide) and repeat