Translocation

Question 1

Translocation Steps

Answer 1

• Companion cells move H+ ions into source (AT)
• Created conc gradient. H ions diffuse back into companion cells with sucrose (facilitated diffusion)
• Sucrose moves into sieve tubes
• Lowers water potential. Water enters from xylem and increases hydrostatic pressure.
• Water and sucrose forced down phloem.
• Sucrose removed at sink. Increased water pot so water moves out. Increased hydrostatic pressure .pressure gradient created.

Question 2

Translocation deffinition

Answer 2

Mass flow of sucrose in phloem tissue form source to sink.