The researchers placed the fully unfolded leaves of Arabidopsis thaliana, which grew well for 4-5 weeks, under light and opened the stomata. Tear off the lower epidermis of Arabidopsis thaliana and ma

The researchers placed the fully unfolded leaves of Arabidopsis thaliana, which grew well for 4-5 weeks, under light and opened the stomata. Tear off the lower epidermis of Arabidopsis thaliana and make temporary slices. (1) pore size can be measured by a microscope.

(2) As can be seen from the analysis chart, there are blank controls without ethephon treatment, leaves with different concentrations of ethephon are used for mutual control, and there are self-controls after ethephon treatment and removal.

(3) Histogram analysis showed that ethylene could induce stomatal closure.

(4) By analyzing the histogram, it can be seen that with the increase of ethephon concentration, the effect of ethephon on stomatal closure of leaves is more significant. Treating Arabidopsis thaliana leaves with 0.004% ethephon will not harm guard cells, and a good induction effect can be obtained.

So the answer should be:

(1) microscope

(2) Blank, Mutual and Self (write two of them)

(3) pores are closed

(4)0.004%