Contents
What 4 factors affect the rate of transpiration?
The rate of transpiration is affected by several factors, including:
- temperature.
- humidity.
- wind speed.
- light intensity.
What 5 factors affect the rate of transpiration for a plant?
Factors that affect transpiration in plants The light intensity, temperature, humidity, wind and water supply will all affect the transpiration rate.
What affects transpiration rate in plants?
Plants regulate the rate of transpiration by controlling the size of the stomatal apertures. The rate of transpiration is also influenced by the evaporative demand of the atmosphere surrounding the leaf such as boundary layer conductance, humidity, temperature, wind and incident sunlight.
How does leaf size affect transpiration rate?
The wider the leaf area, the greater the rate of transpiration because wide leaves tend to have more stomata [5].
What is transpiration and factors affecting transpiration?
The cellular factors affecting the rate of transpiration are: The orientation of leaf, The water status of the plant, Structural Peculiarities of the leaf, Total number and distribution of stomata in a leaf.
What are the 6 factors affecting transpiration?
Factors affecting transpiration
| Factor | Change in factor that increases transpiration rate |
|---|---|
| Temperature | Increase |
| Humidity | Decrease |
| Air movement | Increase |
| Light intensity | Increase |
What increases the rate of transpiration?
The rate of transpiration can be affected by: light intensity, air movement, temperature and humidity. Increased light intensity will increase the rate of photosynthesis so more water is drawn into the leaves where photosynthesis primarily takes place and therefore the rate of transpiration is greater.
How does leaf size affect water loss?
The Smaller the Leaf Is, the Faster the Leaf Water Loses in a Temperate Forest. Leaf size (i.e., leaf surface area and leaf dry mass) profoundly affects a variety of biological carbon, water and energy processes.
How does wind increase transpiration?
There are a number of factors that determine transpiration rates: Wind and air movement: Increased movement of the air around a plant will result in a higher transpiration rate. Wind will move the air around, with the result that the more saturated air close to the leaf is replaced by drier air.
How does leaf structure affect rate of transpiration?
Some plants possess stomata that are sunken into the leaf surface, dramatically increasing the boundary layer and slowing transpiration. Boundary layers increase as leaf size increases, reducing rates of transpiration as well. The thicker the cuticle layer on a leaf surface, the slower the transpiration rate.
How does Leaf area affect transpiration?
Internal factors that affect transpiration rates The leaf area influences the rate of transpiration. The wider the leaf area, the greater the rate of transpiration because wide leaves tend to have more stomata [5].
How does leaf structure affect transpiration?
The larger the boundary layer, the slower the rates of transpiration. Plants can alter the size of their boundary layers around leaves through a variety of structural features. The thicker the cuticle layer on a leaf surface, the slower the transpiration rate. Cuticle thickness varies widely among plant species.
There is a close inter-relationship between transpiration and leaf structure. The rate at which transpiration occurs refers to the amount of water lost by plants over a given time period. Plants regulate the rate of transpiration by opening and closing of stomata (see figure below).
How much water does a plant lose during transpiration?
About 5-10% of the water from the leaves is lost through cuticular transpiration. During dry conditions when the stomata are closed, more water is transpired through the cuticles.
How does pubescence affect the rate of transpiration?
Leaves that possess many hairs or pubescence will have larger boundary layers; the hairs serve as mini-wind breaks by increasing the layer of still air around the leaf surface and slowing transpiration rates. Some plants possess stomata that are sunken into the leaf surface, dramatically increasing the boundary layer and slowing transpiration.
Why are stomata important to the transpiration process?
Stomata are minute pores present on the lower side of the leaves that help in the exchange of gases and water vapour. When the stomatal pores open the rate of transpiration increases, and when the pores are closed, the loss of water is reduced. How is transpiration important to the plants?