Study Notes
Translocation is the movement of sucrose and amino acids in the phloem from sources to sinks in plants.
- Translocation — movement of sucrose and amino acids in phloem from sources to sinks Example: Sucrose moves from leaves to roots for storage.
- Source — parts of plants that release sucrose or amino acids Example: Leaves are a source when they produce sucrose during photosynthesis.
- Sink — parts of plants that use or store sucrose or amino acids Example: Roots are a sink when they store sucrose as starch.
- Phloem — tissue that transports sucrose and amino acids throughout the plant Example: Phloem moves nutrients from leaves to growing buds.
Exam Tips
Key Definitions to Remember
- Translocation: movement of sucrose and amino acids in phloem from sources to sinks
- Source: parts of plants that release sucrose or amino acids
- Sink: parts of plants that use or store sucrose or amino acids
Common Confusions
- Confusing xylem with phloem; remember phloem transports nutrients, xylem transports water
- Thinking translocation only occurs in one direction; it can occur in any direction in the phloem
Typical Exam Questions
- What is translocation? Movement of sucrose and amino acids in phloem from sources to sinks
- What is a source in the context of translocation? Parts of plants that release sucrose or amino acids
- What is a sink in the context of translocation? Parts of plants that use or store sucrose or amino acids
What Examiners Usually Test
- Understanding of the direction and purpose of translocation
- Ability to identify sources and sinks in different scenarios
- Differences between xylem and phloem in plant transport systems