What causes the rate of photosynthesis to decrease?

What causes the rate of photosynthesis to decrease?

Three factors can limit the rate of photosynthesis: light intensity, carbon dioxide concentration and temperature.

What decreases photosynthesis in plants?

Water deficit (WD) decreases photosynthetic rate (A) via decreased stomatal conductance to CO2 (gs) and photosynthetic metabolic potential (Apot).

What happens to cause a plant to wilt?

On a hot, dry day (or after several days with no rain or watering), transpiration causes more water to be lost than is coming in, and the water balance within the plant can get thrown off. The dehydrated collapsing cells in the leaves and stems can no longer remain erect, and the plant begins to wilt.

How does water affect the rate of photosynthesis in plant?

Water affects the rate of photosynthesis indirectly. Water stress causes the stomata to close and thereby reduces carbon dioxide availability. Water stress also results in wilting of leaves and therefore reduces metabolic activity performed by leaves.

Which factor can affect the rate of photosynthesis by denaturing enzymes in the plant?

temperature
As temperature increases the number of collisions increases, therefore the rate of photosynthesis increases. However, at high temperatures, enzymes are denatured and this will decrease the rate of photosynthesis.

How does wavelength affect the rate of photosynthesis?

The wavelength of light is also important. PSI absorbs energy most efficiently at 700 nm and PSII at 680 nm. Light with a higher proportion of energy concentrated in these wavelengths will produce a higher rate of photosynthesis.

How wilting affects the rate of photosynthesis?

Wilting also serves to reduce water loss, as it makes the leaves expose less surface area. The rate of loss of water from the plant is greater than the absorption of water in the plant. The process of wilting modifies the leaf angle distribution of the plant (or canopy) towards more erectophile conditions.

Why are plants withered and wilted?

When the soil of a plant runs too low of available water, the water chains in the xylem become thinner and thinner due to less water. Effectively, the plant is losing water faster than it is absorbing it. When this happens, the plant loses its turgidity and begins to wilt.

How does wilting affect the rate of photosynthesis?

How does water scarcity affect the rate of photosynthesis?

Water affects the rate of photosynthesis indirectly. When the water supply is limited then stomatal closure affects the rate of photosynthesis. Water stress also results in wilting of leaves and therefore reduces metabolic activity performed by leaves.

Why do enzymes denature photosynthesis?

The chemical reactions involved in photosynthesis are controlled by enzymes . As temperature increases the number of collisions increases, therefore the rate of photosynthesis increases. However, at high temperatures, enzymes are denatured and this will decrease the rate of photosynthesis.

Why is the rate of photosynthesis in plants low?

Again when the temperature is very high, the activity of enzymes decreases which leads to low rate of photosynthesis. (ii) Green light is least useful in photosynthesis, because chlorophyll does not absorb green light. Please log in or register to add a comment.

Why do some plants wilt but others don’t?

So why do plants wilt? Usually because they are thirsty! Many nonwoody plants rely almost exclusively on water pressure, or turgor, within their cells to keep them erect. However, plants are constantly losing water through small openings in their leaves (called stomata) in a process known as transpiration.

Why does my plant wilt in the morning?

You leave for work in the morning and your plant looks perfectly happy, but by the time you come home, it’s sad and droopy. So why do plants wilt? Usually because they are thirsty! Many nonwoody plants rely almost exclusively on water pressure, or turgor, within their cells to keep them erect.

How does the rate of transpiration affect plant uptake?

Factors that affect the rate of transpiration also affect water uptake by the plant. If water is scarce, or the roots are damaged, a plant may wilt. This table shows the effects on the rate of transpiration when certain factors are increased.