(±)-Jasmonic acid is a plant growth regulator and a derivative of a-linolenic acid (Item Nos. 90210 | 21910).{5927} It decreases chlorophyll levels in green and etiolated barley leaf segments when used at concentrations of 10 and 50 uM.{52181} (±)-Jasmonic acid (10-1,000 uM) inhibits elongation of rice seedlings.{52182} It increases germination of S. hermonthica seeds by 26% when used at a concentration of 1,000 uM.{52183}