Table of Contents
What are the factors affecting translocation?
Factors Affecting Translocation Rate The rate of photosynthesis (which is affected by light intensity, CO2 concentration, temperature, etc.) The rate of cellular respiration (this may be affected by any factor which physically stresses the plant)
How does photosynthesis affect translocation?
Photosynthesis produces glucose in the green parts of plants, which are often leaves. This is then converted into sucrose. The movement of sucrose and other substances like amino acids around a plant is called translocation .
How does temperature affect translocation?
When the top was maintained in an optimum temperature for photosynthesis and the root for respiration, the rate of translocation reached the maximum, but it was decreased in any other temperature conditions. The light irradiation time became longer, the larger the rate of translocation became.
What are the factors affecting transpiration and translocation in plants?
Factors affecting transpiration
| Factor | Change in factor that increases transpiration rate |
|---|---|
| Temperature | Increase |
| Humidity | Decrease |
| Air movement | Increase |
| Light intensity | Increase |
What is mechanism of translocation?
Translocation is the movement of materials in plants from the leaves to other parts of the plant. This causes sugar to build up in the phloem in the leaves, and water enters via osmosis, or when a material, such as water, moves from an area where there is more of it into an area where there is less.
How does dermal tissue help plants on a hot day?
How does dermal tissue help plants on a hot day? It has a waxy material that prevents the loss of water to the environment. This is a tissue that makes up most of the fleshy part of a plant.
What tissues are involved in translocation?
Xylem and phloem
| Tissue | What is moved | Process |
|---|---|---|
| Xylem | Water and minerals | Transpiration stream |
| Phloem | Sucrose and amino acids | Translocation |
In what two ways does sunlight increase the rate of transpiration?
Factors affecting rate
| Factor | Effect | Explanation |
|---|---|---|
| Wind speed | Increased | Moving air removes water vapour, increasing the rate of diffusion of water vapour from the leaf |
| Light intensity | Increased | The stomata open wider to allow more carbon dioxide into the leaf for photosynthesis |
How does light affect transpiration experiment?
Light Intensity: Increasing the light intensity to which a plant is exposed is predicted to cause an increase in the rate of transpiration. Increasing light exposure will cause more stomata to open in order to facilitate photosynthetic gas exchange.
How does sunlight affect the transpiration of a plant?
Transpiration is the loss of water from aerial part of the plant in the form of water vapour. Generally this process is takes place during day time. Sunlight is one of the external climatic factor directly affect the rate of transpiration.
How does the sun affect the human body?
Both forms can damage collagen fibers, destroy vitamin A in skin, accelerate aging of the skin, and increase the risk of skin cancers. Excessive sun exposure can also cause cataracts and diseases aggravated by UVR-induced immunosuppression such as reactivation of some latent viruses.
How does downward translocation of a plant work?
After a short duration of sunshine, it is noticed that in plant B, the portion of the cut stem immediately bulges above the ring. On the other hand, plants A and C have no any sign of bulging. This works on the foundations of downward translocation taking place in the phloem as plant’s B phloem was removed.
How is sucrose transported in the process of translocation?
All of this extra material increases the pressure and forces the solution down and through the sieve plate. It then gets to the sink where the sucrose is moved by active transport into the parenchyma; where it is made into insoluble starch so the water returns to the xylem.