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A-Level Biology OCR A

Phloem Apoplast Route Sucrose Describe Loading Travels Cell

Front Describe the apoplast route for phloem loading.
Back Apoplast route for phloem loading:
  • Sucrose travels thru cell walls and intercellular spaces to companion cells and sieve elements 
  • Happens by diffusion down gradient maintained by removal of sucrose into phloem vessels

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