Abstract:By using bioassays, some plant growth-regulating activities of matrine were determined. The results obtained indicated that matrine obviously increased both the fresh and the dry weight of isolated cucumber cotyledons. Matrine decreased the total chlorophyll content but stimulated the photosynthesis of isolated cucumber cotyledons cultured in light (5000 Ix, 26 ℃). Furthermore, the rooting of isolated cucumber cotyledons cultured in the dark (25 ℃) was markedly promoted by matrine. These phenomena showed that matrine had distinct plant growth-stimulating activites.