The direction of movement of food in the phloem can be bidirectional. Justify.
Asked by Topperlearning User | 11th Jul, 2014, 01:28: PM
Usually, the source is the part of a plant where food is synthesised and the sink is the part of the plant where the food is required or stored.
However, it can be reversed, especially during seasonal changes or according to the plant’s need.
In the early spring, sugar stored in the roots is sometimes used and acts as a source, and the buds of trees which need energy for growth and development of the photosynthetic apparatus act as a sink.
Hence, the source-sink relationship is variable in plants, and the direction of movement of food in the phloem is bidirectional.
Answered by | 11th Jul, 2014, 03:28: PM
- Mass flow hypothesis?
- Name the vascular tissue which transports sucrose in plants.
- Name the form of carbohydrates which is transported in plants as food.
- What are the components of phloem sap?
- Name the process by which sucrose is moved to companion cells and sieve tube cells of the phloem according to the pressure flow hypothesis.
- Define the following with respect to plants: Source Sink
- What do you understand by the loading of source?
- Represent the pressure flow hypothesis diagrammatically.
- How will you explain that the phloem is responsible for food transport by an experiment?
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Verify mobile number
Enter the OTP sent to your number