01565naa a2200205 a 450000100080000000500110000800800410001910000290006024500900008926000090017952010200018865000140120865000170122265000090123965300130124865300210126165300120128270000160129477300490131010770541996-05-13       1985    bl ---       0--  u    #d1 aVILLALOBOS-RODRIGUEZ, E.  aResponse of determinate and indeterminate tropical soybean cultivars to water stress.  c1985  aField and glasshouse experiments were conducted at the University of Costa Rica experiment station to test the hypothesis that indeterminatetropical soybean (Glycine max L.Merr) cultivars could better tolerate moisture stress than determinate types. In the field (dry season 1982)stress treatments, consisting of withholding water for 15  days, were given before flowering and during the R2 (full bloom) and the R3 (early podding) stages of plant development. In the glasshouse (August-nobember, 1982) stress treatments, consisting of withholding water for 10 days, were imposed preflowering,R2, R4 (mid-podding) and R6 (mid-seedfilling). Field-grown plants under stress had predawn leaf water potentials that were 0,1 - 0,2 MPa less than those of well-watered control plants 7 days after withholding water began. Stomata showed the most rapid decline in water vapor conductance at leaf water potential between -1,2 and - 1,4 MPa. Under moderate to severe stress, stomata on the adaxial surface closed completely...  acultivars  awater stress  aSoja  aCultivar  aEstresse hidrico  aSoybean1 aSHIBLES, R.  tField Crops Researchgv.10, p.269-281, 1985.