01369naa a2200193 a 450000100080000000500110000800800410001910000190006024501390007926000090021852008030022765000090103065000110103965300220105070000200107270000190109270000180111177300460112914195031996-01-19       1989    bl ---       0--  u    #d1 aGRIFFIN, B. S.  aThe influence of water stress on the physiology and competition of soybean (Glycine max) and Florida Beggarweed (Desmodium tortuosum).  c1989  aReplacement studies were conducted under greenhouse conditions to determine if available soil water influences the competitive interaction between soybean and Florida beggarweed. Stomatal conductance and leaf water potential were determined for both species under different levels of available soil water to identify possible mechanisms involved in changes in the relative competitiveness than Florida beggarweed when there was adequate soil water but less competitive than Florida beggarweed under water stress. Stomatal conductance was higher for soybean with optimum soil water (at high leaf water potentials) but equal to Florida beggarweed as soil water became limiting (low leaf water potentials). These data indicated that water stress differentially affected soybean and Florida beggarweed.  aSoja  aStress  aPotencial de agua1 aSHILLING, D. G.1 aBENNETT, J. M.1 aCURREY, W. L.  tWeed Sciencegv.37, n.4, p.544-551, 1989.