Biology · Plant Transport Mechanisms
Girdling (ring bark removal) in a woody stem causes the accumulation of sugars and organic nutrients above the cut primarily because:
- 1Photosynthesis is stimulated in lower tissues
- 2Upward water transport through vessels stops
- 3Downward phloem transport is physically blocked✓
- 4Xylem tissue is completely disrupted
Correct answer
Downward phloem transport is physically blocked
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