The rate of transpiration is influenced by certain factors; these factors may be classified as the (i) External factors or the environmental factors (ii) Internal factors or plants factor. Transpiration in high under View Answer. External Factors . The factors affecting rate of transpiration can be categorized under two groups:. External factors affecting transpiration - Light, atmospheric moisture, wind velocity, air temperature, solar radiation and soil environment. Transpiration is inversely proportional to the relative humidity in the air. This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes. Many environmental factors, such as intensity of light, temperature, atmospheric humidity, wind, availability of soil water, etc., greatly affect the rate of transpiration. If there is more moisture in the air the less amount of water will evaporates from the plant surface. The rate of transpiration is roughly inversely proportional to atmospheric humidity. View Answer. If the root system cannot absorb sufficient water, there leads to water deficit and decrease in rate of transpiration. The table below explains how factors increase the rate of transpiration: Plants living in different habitats have adaptations to resist extremes of these factors. Environmental Factors. Affecting factors of transpiration are of two types; External and Internal. The following article highlights the two types of factors that affect the rate of transpiration. What are antibiotics? Answer Now and help others. Before sharing your knowledge on this site, please read the following pages: 1. How the vascular cambium is responsible for secondary growth? The mode of action of light is both direct and indirect. Factors affecting Transpiration Rate of Transpiration is affected both by the Internal and External Factors. As the air becomes dry, the rate of transpiration also increases proportionately. ‘Ibis diffusion can take place only if the water vapor content of the outer atmosphere is less than that of the inter-cellular spaces of the leaf. SignUp for free. Transpiration is the loss of water from the plant surface into the atmosphere. When there is water deficiency, the guard cells become flaccid and the stomata closes. Atmospheric Humidity: The rate of transpiration is roughly inversely proportional to atmospheric humidity. Factors Affecting Transpiration in Plants, Factors Affecting Transpiration: 10 Factors, Factors Affecting Opening and Closing of Stomata: 4 Factors. The rate of transpiration is always affected by a group of environmental factors like light, temperature, wind, atmospheric humidity, atmospheric pressure, availability of soil water, anti-transpirants. View Answer. 10,000+ Fundamental concepts. Number of stomata per unit area of leaf is called stomatal frequency. Factors That Influence Transpiration - Displaying top 8 worksheets found for this concept. Type # A. Stomatal number: The number of stomata directly affect the rate of transpiration. E = No. Humidity Bright light is the chief stimulus which causes stomata to open. Factors affecting transpiration. Temperature: In general increase in temperatures cause the plant cells which control the openings (stoma) where water is released to the atmosphere to open but at higher temperature (40°C or above) … Suggested Citation:"External Policies and Factors Affecting Transit Use." The stoma opens and transpiration occurs. Leaf area: The plants with broad leaves have high rate of transpiration. Factors Affecting Transpiration - External. If the leaves are arranged transversely on the shoot they lose more water because they are exposed to direct sunlight. Which of the following chemical serves as an anti-transpirant in plant? 9. Factors Affecting Transpiration - External. (A) Internal factors : Leaf area : Larger the surface area of the leaves, more is the transpiration. The rate of transpiration is roughly proportional to the intensity of light. Available water: The higher the water availability in the soil, greater is transpiration. 8,000+ Fun stories. RBSE Class 12 Biology Chapter 7 – Transpiration provides complete information related to Transpiration, types of Transpiration, factors affecting the rate of Transpiration, opening and closing of stomata, guttation, bleeding, different mechanisms of opening and closing of stomata and a lot more related to transpiration in plants. External Factors Affecting The Rate of Transpiration Light. Light: Light induces photosynthesis in guard cells  leading to sugar synthesis. Light: The presence of light favours the opening of stomata and transpiration takes place through them. As the outward diffusion of water vapors through stomata is in accordance with the law of simple diffusion, the rate of transpiration is greatly reduced when the atmosphere is very humid. (With Methods)| Industrial Microbiology, How is Cheese Made Step by Step: Principles, Production and Process, Enzyme Production and Purification: Extraction & Separation Methods | Industrial Microbiology, Fermentation of Olives: Process, Control, Problems, Abnormalities and Developments. Atmospheric humidity In a humid atmosphere, (when relative humidity) is high), the rate of transpiration decreases. But even internal factors affect the rate of transpiration. Following factors affect the rate of transpiration: (a) External factors. Watch Factors Affecting Transpiration - External in English from Transpiration and Significance of Transpiration here. 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