[The influence of methyl jasmonate on the growth processes in the pea]

The influence of methyl jasmonate (MJ) on pea growth was studied. Stimulation of seed germination by MJ [10(-9), 10(-6) M] was carried out for 24 h. MJ [10(-9) M] intensifies the epicotyl growth, and MJ [10(-6) M] inhibits the epicotyl and root growth. Season dependence of mitosis regulation was determined. The maximum intensity was observed early in spring with MJ [10(-6) M], and autumn with MJ [10(-9) M], with almost one order less intensity, the latter intensity being one order less, suggesting a general loss of cell sensitivity to regulator. The peak of mitotic activity in summer was between the spring and autumn peaks due to the low concentration of effector. It is supposed that jasmonoids are able to coordinate cell entry to mitosis in different seasons.