The phloem tracer experiment uses radioactive 14CO2; the resulting 14C incorporated into sugars blackens X-ray film positioned over phloem sections, confirming that only the phloem translocates sugars.
- plant grown in radioactive 14CO2 - 14C incorporated into sugars formed from photosynthesis - cross sections of plant stem placed on X-ray film - film blackens where exposed to radiation - blackened positions correspond to phloem position - Therefore only the phloem translocates sugars
| Front | Describe the phloem tracer experiment. |
|---|---|
| Back | - plant grown in radioactive 14CO2 - 14C incorporated into sugars formed from photosynthesis - cross sections of plant stem placed on X-ray film - film blackens where exposed to radiation - blackened positions correspond to phloem position - Therefore only the phloem translocates sugars |
Tags: plant_transport
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