Effect of salinity on the growth and nitrogen uptake by wheat seedlings

Saline conditions affect nitrogen (N) assimilation of higher plants. To study the effect of salinity and N source on growth and N uptake in wheat (Triticum aestivum L.), plants were grown in a growth chamber under controlled conditions. The nutrient solution contained 4 mM N, applied as either calci...

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Bibliographic Details
Published in:Journal of plant nutrition 1997-01, Vol.20 (6), p.793-804
Main Authors: Botella, M.A. (CSIC, Murcia, Spain.), Martinez, V, Nieves, M, Cerda, A
Format: Article
Language:English
Subjects:
ABSORCION DE SUSTANCIAS NUTRITIVAS
ABSORPTION DE SUBSTANCES NUTRITIVES
Agronomy. Soil science and plant productions
AMMONIAC
AMONIACO
Biological and medical sciences
CHLORURE DE SODIUM
CLORURO SODICO
CONTENIDO DE MATERIA SECA
Deficiencies. Phytotoxicity of elements. Salinity
Economic plant physiology
FITOTOXICIDAD
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
INHIBICION
INHIBITION
Mineral nutrition
NITRATE
NITRATE DE CALCIUM
NITRATO DE CALCIO
NITRATOS
Nitrogen fertilization
Nitrogen, phosphorus, potassium fertilizations
Nutrition. Photosynthesis. Respiration. Metabolism
PHYTOTOXICITE
PLANTULAS
PLANTULE
RACINE
RAICES
SALINIDAD
SALINITE
Soil-plant relationships. Soil fertility. Fertilization. Amendments
SULFATE D'AMMONIUM
SULFATO DE AMONIO
TALLO
TENEUR EN MATIERE SECHE
TIGE
TRITICUM AESTIVUM
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Summary:Saline conditions affect nitrogen (N) assimilation of higher plants. To study the effect of salinity and N source on growth and N uptake in wheat (Triticum aestivum L.), plants were grown in a growth chamber under controlled conditions. The nutrient solution contained 4 mM N, applied as either calcium nitrate [Ca(NO3)2] or ammonium sulfate [(NH4)2SO4], or a mixture of both, and the salinity treatments consisted in two levels of sodium chloride (NaCl)(1 and 60 mM) Salinity significantly reduced shoot and root growth and the effect of the N source was dependent on which salinity treatment was applied. Salinity decreased the net uptake rate of nitrate (NO3) and NO3+ ammonium (NH4), but had little effect on NH4 uptake when this nutrient was applied alone. Dark conditions affected NO3 uptake to a greater extent than NH4 uptake. The best N source for wheat growth was a mixture of NO3 and NH4, especially under saline conditions or periods of low irradiance
ISSN:0190-4167
1532-4087
DOI:10.1080/01904169709365295