BRAINCAKEEvidence for Translocation in Phloem
A summary of the evidence for translocation in phlem is listed below:
1. When phloem is cut a solution of organic molecules flow out.
2. Plants provided with radioactively labelled carbon dioxide can be show to have radioactive carbon in the phloem after a short time.
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Key terms in this lesson
- phloem
- Plant vascular tissue, made of sieve tube elements and companion cells, that transports organic solutes such as sucrose around the plant.
- translocation
- The movement of organic substances, such as sucrose and amino acids, around a plant in the phloem, from a source to a sink.
- gene
- A length of DNA that codes for a polypeptide or a functional RNA molecule, at a specific locus on a chromosome.
More in Mass Transport in Plants
- Movement of Water Through the Stomata
- Translocation
- Phloem Loading
- Mass Flow through Sieve Tube Elements
- Mass Flow Model
- Phloem Unloading
- Ringing Experiments
- Tracer Experiments
All 15 lessons in Mass Transport in Plants · All AQA AS-level Biology topics