
TY  - JOUR
A1  - Rego, TJ 
A1  - Grundon, NJ 
A1  - Asher, CJ 
A1  - Edwards, DG 
T1  - Effects of Water Stress on Nitrogen Nutrition of Grain Sorghum
JF  - Functional Plant Biology
JO  - Functional Plant Biol.
Y1  - 1986
VL  - 13
IS  - 4
SP  - 499
EP  - 508
KW  - 
UR  - https://doi.org/10.1071/PP9860499 
N2  - A solution culture experiment was conducted to study the effects of solution osmotic potential and nitrogen (N) supply on growth and N content of grain sorghum cv. Texas 610SR. Polyethylene glycol-6000 was used to impose solution osmotic potentials of -0.1, -0.4, -0.8, and - 1.1 MPa during the fourth week of growth. Plants were harvested at 6 weeks.    Dry matter yields, total plant N content and mean rate of N uptake per unit root weight were significantly decreased by decreases in solution osmotic potential and N supply. Numbers of leaves expanded after imposition of the solution osmotic potential treatments were also reduced significantly by decreasing solution osmotic potential and decreasing N supply. Decreasing solution osmotic potential decreased mean N concentrations in leaves, had no effect on mean N concentrations in roots, and increased N concentrations in stems plus immature leaves, and in whole tops.    The form of relationships between leaf N concentration and yield prevented the calculation of critical N concentrations at any level of solution osmotic potential. 
ER  -

