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
2 of 8
gaps inbetween sieve tubes and companion cells
plasmodesmata
3 of 8
plant cell water pathways
apoplast, symplast, vacuolar
4 of 8
casparian *****
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
5 of 8
transpiration
the loss of water vapour from upper parts of the plant especially the leaves
6 of 8
source
an area which pumps sucrose into phloem
7 of 8
sink
an area which removes sucrose from the phloem
8 of 8
Other cards in this set
Card 2
Front
companion cells in phloem
Back
in-between sieve tubes, large nucleus, dense cytoplasm, many mitochondria
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