The metabolic rate of the plant = plants with a higher metabolism have a higher transpiration rate . ... The amount of water in the soil – plants that have access to more soil water will transpire at a higher rate than those which don't.
Why do some plants transpire more than others?
The amount of water that plants transpire varies greatly geographically and over time. ... 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.
Is the rate of transpiration same in all the plants?
Plants regulate the rate of transpiration by opening and closing of stomata (Figure 5.14). There are, however, a number of external factors that affect the rate of transpiration, namely: temperature, light intensity, humidity, and wind. ... Different environmental conditions trigger both the opening and closing of stomata.
How do different factors affect 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 do plants regulate their rate of transpiration?
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.
Why do plants transpire more rapidly during the day?
Plants transpire more rapidly in the light than in the dark. This is largely because light stimulates the opening of the stomata (mechanism). Light also speeds up transpiration by warming the leaf. Plants transpire more rapidly at higher temperatures because water evaporates more rapidly as the temperature rises .
Why is evapotranspiration higher in summer?
Potential Evapotranspiration
PET is higher in the summer, on less cloudy days, and closer to the equator, because of the higher levels of solar radiation that provides the energy for evaporation . ... The difference between potential evapotranspiration and precipitation is used in irrigation scheduling.
Is the rate of transpiration higher on a sunny day or a rainy day Why?
Transpiration rate is faster during a sunny day because of the sun ⛅ . It evaporates most of the water and allows more molecular space for more to come.
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].
Do plants transpire at night?
Plants grow and transpire water during the day and night . ... The cost of night-time transpiration is that water is lost without carbon being gained, the benefit is a higher efficiency of taken up water for use in leaf expansion. This could provide a stress acclimation process.
Why does light increase the rate of transpiration?
Light intensity: The transpiration rate is increased due to the increase in light intensity . During daytime in the sunlight, the rate of transpiration is faster. This is because the stomata remains open to allow the inward diffusion of carbon dioxide for photosynthesis.
On which day will the rate of transpiration be the fastest?
AS THE EVAPORATION WILL BE FASTER ON A HOT DAY .... ND DRY AND WINDY DAY. THE WIND CARRIES AWAY THE WATER MOLECULES FROM THE SURFACE ND COOLS THE SURFACE FASTER.
What factor slows transpiration?
The thicker the cuticle layer on a leaf surface , the slower the transpiration rate. Cuticle thickness varies widely among plant species. In general, plants from hot, dry climates have thicker cuticles than plants from cool, moist climates.
What happens if there is no transpiration in plants?
If the process of transpiration stops in plants, then the excess water inside the plants will not be able to come out . Hence, the plants will burst due to the presence of excess of water inside them.
Which factor does not affect the rate of transpiration in plants?
Some internal factors also affect rate of transpiration e,g., leaf area, leaf stucture and age of plants. Chlorophyll content of leaves does not directly affect rate of transpitation.
What is transpiration and its importance?
The loss of water from the aerial parts of the plant in the form of vapour is called transpiration. It helps in absorption and upward movement of water and minerals dissolved in it from roots to the leaves. Transpiration pull is especially important at night. It also helps in temperature regulation.
