translocation and transpiration

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sieve tubes in phloem
little cytoplasm, no nucleus, pores perforate cross walls, five or six sided
1 of 8
companion cells in phloem
in-between sieve tubes, large nucleus, dense cytoplasm, many mitochondria
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gaps inbetween sieve tubes and companion cells
plasmodesmata
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plant cell water pathways
apoplast, symplast, vacuolar
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casparian strip
blocks apoplast pathway between cortex and xylem, makes sure that nitrate ions have to enter the xylem to lower WP, doesnt let water back into the cortex as symplast pathway is blocked
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transpiration
the loss of water vapour from upper parts of the plant especially the leaves
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source
an area which pumps sucrose into phloem
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sink
an area which removes sucrose from the phloem
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Other cards in this set

Card 2

Front

companion cells in phloem

Back

in-between sieve tubes, large nucleus, dense cytoplasm, many mitochondria

Card 3

Front

gaps inbetween sieve tubes and companion cells

Back

Preview of the front of card 3

Card 4

Front

plant cell water pathways

Back

Preview of the front of card 4

Card 5

Front

casparian strip

Back

Preview of the front of card 5
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