• transporting sucrose around the plant
  • the sucrose travels up the phloem
  • cells in phloem are alive
  • companion cells have lots of mitochondria (which perform aerobic respiration) and this produces atp
  • atp goes through plasmodesma to the sieve tube from the companion cell
  • one exception where atp doesnt stay inside of the cell
  • sieve tube can then carry out a lot of active transport with the atp that the sieve tube has gained 
  • this allows sucrose to be taken around the plant (along with other mechanisms)
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