Aa. Carbonellbarrachina et al., EFFECT OF SODIUM ARSENITE AND SODIUM-CHLORIDE ON BEAN PLANT NUTRITION(MACRONUTRIENTS), Journal of plant nutrition, 20(11), 1997, pp. 1617-1633
The effects of different levels of arsenic (As) and salinity on bean p
lant (Phaseolus vulgaris L., cv. Buenos Aires) nutrition were investig
ated. We studied the processes of absorption and accumulation of macro
nutrient elements: nitrogen (N), phosphorus (P), potassium (K), calciu
m (Ca), and magnesium (Mg). The experiment was performed in soilless c
ulture at two levels of As: 2 and 5 mg As . L-1 (added as sodium arsen
ite, NaAsO2,), and three saline levels [only sodium chloride (NaCl) wa
s added]: 1, 2, and 4 dS.m(-1). Sodium arsenite and NaCl significantly
affected macronutrients allocation within bean plant at concentration
levels used in this study. Arsenite depressed K, Na, and Mg concentra
tions in root, whereas root N, and Ca levels were increased. Nitrogen,
P, K, and Na concentrations were significantly higher in As-stressed
plants compared with controls. The addition of NaCl increased Ca conce
ntration in roots and decreased that of K. Salinity tended to increase
leaf concentrations of K, Na, Ca, and Mg; whereas leaf N and P levels
decreased with increasing salinity.