AP BIOLOGY

Detailed explanation-1: -It was found that transpiration was diminished as a result of foliar dust deposition which not only caused blockage of stomatal aperture but also physical damage to the leaf surface. Thus, particulate air pollution can be considered as one of the external factors regulating the rate of transpiration in plants.

Detailed explanation-2: -Atmospheric pollutants exerted only minor effects on tree transpiration. Daily transpiration rate was most affected by air temperature, soil temperature, total radiation, vapor pressure deficit, and ozone.

Detailed explanation-3: -Temperature-as temperature increases, so does the rate of transpiration. The lower the temperatures, the lower the transpiration rate. Guard cells tend to close the stomata in windy conditions to prevent that.

Detailed explanation-4: -The rate at which transpiration occurs is varied based on temperature, air movement such as wind, how much moisture is in the soil and surrounding air, the type of plant and land use. Temperature plays a major role in the rate of transpiration.

Detailed explanation-5: -Transpiration increases with increasing air temperature and wind velocity. At constant temperature and wind velocity, transpiration rate is governed by moisture content of air. Transpiration also increases with decreasing relative humidty at constant wind velocity.