Optimum temperature for photosynthesis: from leaf- to ecosystem-scale. | Semantic Scholar (2024)

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Optimum temperature for photosynthesis: from leaf- to ecosystem-scale. | Semantic Scholar? ›

The global terrestrial average value of ecosystem-scale optimum temperature for photosynthesis is estimated to be 23 ± 6 °C, with large spatial heterogeneity [57].

Certain grasses (corn, sorghum and sugarcane) and other crops (cotton) use the more efficient “C4” pathway of accumulating carbon dioxide. The C4 plants generally originate from tropical regions, and photosynthesis is optimal at temperatures from 68-95°F (20-35°C).

A temperature range of 25° to 35° C is required for photosynthesis to be carried out efficiently.

An optimum temperature is required for different types of photosynthesis to take place. The C3 plants survive at a lower temperature conditions, while C4 plants survive at a higher range of temperatures​. C3 plant requires an optimum temperature of 18oC−24oC . C4 plant requires an optimum temperature of 32oC−55oC .

Plants grow well in moderate temperatures between 21°-29° C. Both higher and lower temperatures slow the plants rate of metabolism and growth. Plants grow fastest when the temperature during the lit period is kept between 22°-26°C.

the temperature optimum for plants to perform photosynthesis keeps varying from plant to plant. If the plant is a C3 plant its temperature optimum is around 20- 25 C. Whereas if the plant is a C4 plant the temperature optimum is above 40 C. The CAM plants are adapted to sustain at higher temperatures.

Leaves' ability to photosynthesize – the process by which they make energy from carbon dioxide, sunlight and water – begins to fail when their temperature reaches around 46.7 degrees Celsius (116 Fahrenheit).

It has been reported that photosynthetic capacity increases with temperature up to an optimum temperature with a typical range of 30°C-40°C, and the optimum temperature for leaf-scale photosynthesis ( leaf opt ) varies with plant species, climates, soil nutrients (Kattge & Knorr, 2007).

In ideal conditions for photosynthesis – bright light, high temperatures and plentiful water – photosynthesis tends to reduce carbon dioxide concentration and raise oxygen concentration, favouring photorespiration (high temperatures also help) and greatly reducing the rate of photosynthesis.

Plants that are grown at cold temperature regimes show maximum rates of photosynthesis at lower temperatures than do plants grown under warm temperature regimes, and an increase in growth temperature results in an increase in optimal temperature for photosynthesis.

Why is C4 photosynthesis better than C3? ›

Due to their reduced rate of photorespiration and high rate of photosynthesis, C₄ plants are more efficient than C₃ plants.

The increased temperature optimum for Pn of C4 versus C3 plants can be attributed to the CO₂-concentrating system of C4 plants, which compensates for Rubisco inactivation by increasing the CO₂ level around Rubisco.

C4 Photosynthesis

The carbon dioxide then undergoes the Calvin cycle, as in C3 photosynthesis. The benefit of C4 photosynthesis is that it produces a higher concentration of carbon, making C4 organisms more adept at surviving in habitats with low light and water.

As temperature increases the number of collisions increases, therefore the rate of photosynthesis increases. However, at high temperatures, enzymes are denatured. This can be caused by heat, altered pH or by chemical agents. and this will decrease the rate of photosynthesis.

Either too low or too high thermal degrees kill soil-dwelling organisms and plants. In particular, crops develop slowly at 90°F (32°C), while 140°F (60°C) is critical because bacteria in the ground can't survive the heat.

mesophiles: include most bacteria, optimum growth temperature is 20 - 45°C. Many pathogens are mesophiles as their preferred temperature is body temperature (37ºC). thermophiles: heat-loving organisms, optimum growth temperature is 55-65°C. Thermophiles can be found in hot springs, compost heaps, and hot water heaters.

Plants that are grown at cold temperature regimes show maximum rates of photosynthesis at lower temperatures than do plants grown under warm temperature regimes, and an increase in growth temperature results in an increase in optimal temperature for photosynthesis.

In ideal conditions for photosynthesis – bright light, high temperatures and plentiful water – photosynthesis tends to reduce carbon dioxide concentration and raise oxygen concentration, favouring photorespiration (high temperatures also help) and greatly reducing the rate of photosynthesis.

As temperature increases the number of collisions increases, therefore the rate of photosynthesis increases. However, at high temperatures, enzymes are denatured. This can be caused by heat, altered pH or by chemical agents. and this will decrease the rate of photosynthesis.

Usually the plants can perform photosynthesis in the range of 10 to 40 degree celsius. The optimum temperature range is 25 to 30 degree celsius.