Effects of Ammonium Nutrition on Water Stress, Water Uptake, and Root Pressure in Lycopersicon esculentum Mill.
Ammonium (NH(4) (+)) nutrition inhibits water uptake and root exudation and decreases leaf water potential of tomato plants grown in solution culture. This inhibition is readily reversible by NO(3) (-) for short term exposures to NH(4) (+); however, recovery is delayed following long term exposures.
Quebedeaux
B
B
Department of Vegetable Crops, Cornell University, Ithaca, New York 14850.
Ozbun
J L
JL