Ike, 1-F-and Thurtell, G-W-1981. Osmotic adjustment in indoor grown cas,sava in response to water stress--Physiol. The water content-water potential relation in stressed and unstressed cassava {Manihot species) was examined to ascertain (i) the magnitude of osmotic adjustment in response to water stress and (ii) the mechanisms of such adjustments-Water stress resulted in a displacement of the water content-potential relation such that at any leaf water potential the water content was higher in the stressed plants-The osmotic potentials of turgid leaves (100% relative water content) were -0-97 and -1.00 MPa in the unstressed cultivars CMC 9 and MCOL 113 respectively. In the stressed plants, the values were-1-13 MPa (CMC 9) and-1-14 MPa (MCOL 113)-The 0-14 to 0-16 MPa osmotic potential difference between the stressed and unstressed plants suggests that a stress-induced osmotic adjustment occurred in both cuhivars-The bulk volumetric elastic moduli at turgor pressures above 0-10 MPa were 9.84 MPa (CMC 9) and 13-58 MPa (MCOL 113) in the unstressed plants-Tbe higher values found in the stressed plants, 14-56 MPa in CMC 9 and 16-91 MPa in MCOL 113, suggest a stress-induced decrease in cell wall elasticity-Hence, the observed shift in the water content-potential relations in the cassava involved both an osmotic adjustment and a decrease in cell wall elasticity-Increasing the number of stress cycles per plant did not eause a further displacement of the water content-potential curves-