Factors effecting transpiration rates

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Factors effecting transpiration rates

Plants also pump the water up from the soil to supply nutrients to aerial plant parts i.

Factors effecting transpiration rates

It also includes a process called guttation, which is the loss of water in liquid form from the uninjured leaf or stem of the plant, principally through water stomata. According to resent studies it has be revealed that about 10 percent of the moisture found in the atmosphere is released by plants through transpiration.

The remaining 90 percent is mainly supplied by evaporation from, ocean, seas, lakes, rivers, streams etc. Plants put down roots into the soil for nutrient and water up take to the stems and leaves.

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Some of this water is evaporated to the air by a phenomenon known as transpiration when combined with evaporation, the total process is known as evapotranspiration. The transpiration rates vary extensively depending on weather and climatic conditions, such as temperature, humidity, sunlight availability and intensity, precipitation, soil type and saturation, wind, land slope, and water use and diversion by people.

During dry periods, transpiration increase the loss of water in the upper layer of soil, which effect vegetation, horticultural and agronomic field crops.

During a growing season, a leaf will transpire many times more water than its own weight. An acre of corn gives off about 3, gallons 11, liters of water each day, and a large oak tree can transpire 40, gallonsliters per year. Factors affecting transpiration Rate of transpire varies greatly geographically and over time.

There are different factors that can affect the rate of transpiration as discussed below. Transpiration rate decreases with the increase in relative humidity of the air surrounding the plant and it is easier for water to evaporate from plant leaf stomata into dryer air than into more saturated air.

Wind and air movement: Similar to temperature increased movement of the air around a plant increase the rate of transpiration.

What are the factors which affect the rate of Transpiration Process in Plants?

This is somewhat related to the relative humidity of the air, in that as water transpires from a leaf, the water saturates the air surrounding the leaf. If there is no wind, the air around the leaf may not move very much, raising the humidity of the air around the leaf.

Wind will move the air around, with the result that the more saturated air close to the leaf is replaced by drier air. During drought conditions, plants can begin to senesce premature ageing, which can result in leaf loss and reduce transpiration rate to prevent water loss.

Plants transpire water at different rates. Some plants which grow in arid regions, such as cacti and succulents, conserve precious water by transpiring less water as compared to coastal plants. Transpiration rate increases with the increase in leaf surface area and vice versa.

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Transpiration - Factors Affecting Rates of Transpiration PLANT PARAMETERS – These plant parameters help plants control rates of transpiration by serving as forms of resistance to water movement out of the plant.

Environmental factors that affect the rate of transpiration

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Factors affecting the rate of transpiration process (A) plant factors 1. proportion of total root vegetative when total total total root plant vegetative existence conditions for absorption and transpiration are the amount of water absorbed is greater than the amount of water lost balnth and thus plant grows, and vice versa when the root of the.

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Pakistan Journal of Botany