Question

What is the role of stomata in photosynthesis?​

Answer 1

Answer:

The small pores present on the lower surface of leaf, are called stomata. ... Answer: Stomata absorb carbon dioxide from air for photosynthesis. Stomata facilitates exchange of gases and transpiration.

Answer 2

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• Stomata control the flow of gases in and out of leaves.

• During the day, when air temperatures rise and carbon dioxide levels are normal or above normal, the stomata open, allowing carbon dioxide to enter and photosynthesis to take place.

• Oxygen, a poisonous (to the plant) byproduct of photosynthesis, exits through the stomata.

• At night, the glucose recombines with oxygen, releasing energy as the glucose molecule breaks back into water and carbon dioxide.

• The excess water exits through the stomata in a process called transpiration.

• So, stomata do not directly participate in photosynthesis.

• However, the stomata control the influx of carbon dioxide, a critical component of photosynthesis, and allow the excess oxygen to exit.

• Stomata also control the flow of water vapor out of the leaf, limiting water loss during drought and allowing excess water to exit.

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$\bf\underline\mathcal\red{More\: Info}$

• The raw materials of photosynthesis consist of six water molecules (6H20) and six carbon dioxide (6CO2) molecules. In most plants, the roots absorb water from the soil.

• The water travels up through the xylem, a specialized layer of cells.

• In some plants, the water is absorbed through the leaves, directly from the air.

• Carbon dioxide, an atmospheric gas, enters the leaf through the stomata, the tiny pores in the leaves (a stoma is a single pore).

• When water enters directly from the atmosphere, it also enters the leaf through stomata.

• These raw materials travel into the chloroplasts in the spongy and palisade layers of the leaf.

• The chemicals react, using the sun's energy absorbed by the chlorophyll in the chloroplasts.

$\bf\underline\mathcal\red{Products\: of\: Photosynthesis}$

• The chemical reaction of photosynthesis results in one sugar molecule (glucose: C6H12O6) and 6 oxygen pairs (6O2).

• Plants store the glucose and release the oxygen as a waste product, with most of the oxygen leaving the plant through the stomata.

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