About Lesson
Describe ways in which the phloem is adapted to their function
- Has companion cell with numerous mitochondria for the production of large amounts of energy for translocation;
- Has plasmodesmata that allow communication between companion cells and sieve elements.
- Sieve tubes have perforated sieve plates to allow the movement of materials from one sieve element to the next.
- Has cytoplasmic filaments whose contraction brings about translocation.
- The sieve elements lack protoplasm to allow the movement of manufactured food without resistance.