Tech

Study suggests stomata don’t control water loss from plant leaves


Conducting a series of experiments over the years, scientists have deepened their understanding of plant physiology and their water needs. When plants absorb carbon dioxide during photosynthesis, they tend to lose large amounts of water. This water is very important to them because it makes up their dry matter in addition to supplying it with water. In new research, scientists have uncovered a long-kept secret that could help make plants survive even when using less water.

Plants need about 300 grams of water just to produce one gram of dry mass. This is due to the plant source country are from soil through the roots, then it will evaporate in ozone from the leaves.

The leaves have tiny valves called stomata that open to let in carbon dioxide essential for plant growth and photosynthesis. When these pores open, the moist inner tissue of the leaf is exposed to dryness air outside. This suggests that water vapor can diffuse out whenever the stomata are open.

Researchers have long believed that stomata control how much water escapes from leaves. This comes from the belief that the air inside the leaves is saturated while the air outside is relatively drier. But now, after conducting experiments for the past 15 years, researchers have found evidence against this hypothesis.

They noted that as the humidity outside the leaves decreased, the relative humidity in the interior air space also decreased, sometimes as low as 80 percent. However, it was also observed that even though the humidity inside the leaves decreased, photosynthesis did not stop or slow down.

This indicates that the rate of water loss from the crop is not affected by the increase in the evaporative demand of the outside air. Therefore, if plants are controlling water loss through stomata, one will witness photosynthesis being stopped or slowed down. Research shows that plants can control water loss from their leaves while absorbing carbon dioxide and keeping stomata open. The detectpublished year Natural plantsindicates a possibility that plants may be using special hydrophilic proteins called aquaporins to control the movement of water within them.




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