Abstract
The stomatal behavior ofAdenophora lobophylla of different age structures was studied in July 1995 in greenhouse of the Harbin Forest Farm of Northeast Forestry University by means of shading experiment. The effects of different shading treatments on the stomatal physiological character and ecological adaptation ofA. lobophylla of different ages were compared. The results showed that the morphological characters of annualA. lobophylla were more obvious than that of the perennial, but the stomatal density of annual was less than that of perennial. Growth of annualA. lobophylla was more sensitive to the change of environment than that of the perennial. The ecological adaptation of annual was weak, which was one of the main causes of endangered population.
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