Abscisic acid also know as ABA is plant hormone.Scientists have linked ABA with the opening and closing of the small air passageways in this plants leaves called stoma.what environmental condition is most likely to trigger the closing of leaf stoma

environmental condition is most likely to trigger the closing of leaf stoma are If the environment the difference in water vapor content in the air and in the intercellular space exceeds the critical

Further explanation

Stomata generally open at sunrise and close at dark, so that CO2 is needed for photosynthesis during the day. Generally, the stomata opening process takes one hour. Stomata are also sensitive to atmospheric humidity.

The movement of pore stomata is caused by changes in the volume of guard cells that are regulated by the entry and exit of K + ions and other ions to and from guard cells during the opening and closing of the stomata. Besides light, CO2 concentration, humidity, and plant hormones are some of the factors that influence the opening and closing of stomata. Light causes the opening of the stomata while dark conditions can increase CO2 concentrations and decrease humidity which results in the closing of the stomata. Among the many plant hormones, ABA (abscisic acid) and auxin are plant hormones that influence the movement of stomata. ABA (abscisic acid) causes stomata to close, whereas auxin causes opening .

Other factors that cause stomata opening and closing are as follows: 1. Carbon dioxide (CO2) 2. Light 3. Temperature 4. Leaf Water Potential 5. Humidity 6. Wind

Learn More :

Abscisic acid; https://brainly.com/question/13800529

Stoma ABA; https://brainly.com/question/13579754

Details

Class: Junior High

Subject: Biology

Keywords: Stoma, Abscisic acid, Hormones.