Biology - Transport in plants (transpiration) - B3.2.3

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  • Created by: shcoool
  • Created on: 15-05-15 22:56
Name the two transport systems in flowering plants
xylem and phloem
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What does the xylem do?
xylem tissue transports water and mineral ions from the roots to the stem and leaves
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What does phloem do?
phloem tissue carries dissolved sugars from the leaves to the rest of the plant, including the growing regions and storage organs
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What is the transpiration stream?
the movement of water from the roots through the xylem and out of the leaves
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What process is transpiration?
the process by which water evaporate from the leaves, which results in more water being drawn up from the oots
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Describe the movement of water through the xylem
1. absorbed from soil through root hair cells 2. transported through the xylem vessels up the stem to the leaves, 3. evaporation from the leaves (transpiration)
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What do xylem vessels consist of?
dead cells, thick, strengthened cellulose cell wall with a hollow lumen
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What are phloem vessels involved in and what do they consist of?
translocation, column of living cells
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List four factors that affect the rate of transpiration
light intensity, temperature, humidity and wind
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What is wilting?
Cells lose their turgidity because the rate of water loss is higher than water intake in the rates so water is not pushing against cell walls. also lowers transpiration rate because leaf is curled up
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How do plants try to lose as little water as possible?
Curl up leaves, waxy cuticle stops water loss, stomata open and close by guard cells and and are on the underside
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Other cards in this set

Card 2

Front

What does the xylem do?

Back

xylem tissue transports water and mineral ions from the roots to the stem and leaves

Card 3

Front

What does phloem do?

Back

Preview of the front of card 3

Card 4

Front

What is the transpiration stream?

Back

Preview of the front of card 4

Card 5

Front

What process is transpiration?

Back

Preview of the front of card 5
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