i have done a experiment about the stomata, are the benzene will affect the open or closed of stomata?

Answer 1

Plants are known to absorb benzene from the air, but it doesn't actually happen through stomata. I'm cutting and pasting this from a source I've listed below:

Benzene was removed effectively by the flowering plants in the study - gerbera daisy (Gerbera jamesonii) and chrysanthemum (Chrysanthemum morifolium). Many studies suggest that the major pathway for benzene uptake is through the stomata, as Wolverton asserts. One of the experiments, however, revealed an intriguing alternate route. The cause of the discovery was the implementation of further control methods. Pots containing defoliated plants, only the plant roots in soil, and pots where the soil surface beneath the plant was covered with pea gravel, were put into control chambers. Defoliated marginata (Dracaena marginata) removed more benzene than the regular marginata with pea gravel and the regular pots of soil without plants. The conclusion was that the roots and associated microorganisms were actually a major pathway for benzene absorption. Since more benzene was removed with the roots in the soil than without, this is an example of phytostimulation. The plants provide a habitat on the rhizosphere for microbes, which in turn, remediate the environment to make it more favorable for plant growth.

According to this, benzene should have no particular effect on stomata.