Dymethylsulphoxide (DMSO) was sprayed on carrot plants grown under field conditions on the leaves to determine its effects on fresh biomass accumulation. A 3. 7x 10-3 M solution was sprayed on two occasions during plant development. The results showed thatrootfresh weight was·28%, root length 10% and shoot fresh weight 41% higher in DMSO treated plants than in control plants.