Rice genotype differences in nutrient status under excessive ferric-iron conditions

To investigate the relationship between rice genotypic variation in tolerance to iron (Fe) toxicity and nutrient element status, 10 rice genotypes with different growing performances under Fe toxicity were grown under normal culture solution and with excessive ferrous (Fe2+)-Fe concentrations of 250...

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Bibliographic Details
Published in:Journal of plant nutrition 1997-01, Vol.20 (10), p.1361-1373
Main Authors: Luo, A, Jing, G, Wu, P, Ni, J, Jiang, S, Zhang, Y
Format: Article
Language:English
Subjects:
ABSORCION DE SUSTANCIAS NUTRITIVAS
ABSORPTION DE SUBSTANCES NUTRITIVES
Adaptation to environment and cultivation conditions
Agronomy. Soil science and plant productions
Biological and medical sciences
CATION
CATIONES
CATIONS
CONTENIDO DE NITROGENO
CRECIMIENTO
CROISSANCE
EXCES DE SUBSTANCE NUTRITIVE
EXCESO DE NUTRIENTES
FER
FEUILLE
FITOTOXICIDAD
FOSFORO
Fundamental and applied biological sciences. Psychology
Genetics and breeding of economic plants
GENOTIPOS
GENOTYPE
GENOTYPE ENVIRONMENT INTERACTION
GENOTYPE NUTRITION INTERACTION
GENOTYPES
GROWTH
HIERRO
HOJAS
INTERACCION GENOTIPO AMBIENTE
INTERACCIONES NUTRIENTE NUTRIENTE
INTERACTION GENOTYPE ENVIRONNEMENT
INTERACTION NUTRIMENT NUTRIMENT
IRON
LEAVES
MAGNESIO
MAGNESIUM
NITROGEN CONTENT
NUTRIENT CONTENT
NUTRIENT EXCESSES
NUTRIENT NUTRIENT INTERACTIONS
NUTRIENT UPTAKE
NUTRITIVE VALUE
ORYZA SATIVA
PHOSPHORE
PHOSPHORUS
PHYTOTOXICITE
PHYTOTOXICITY
POTASIO
POTASSIUM
SINTOMAS
SYMPTOME
SYMPTOMS
TENEUR EN AZOTE
TOLERANCE
VALEUR NUTRITIVE
VALOR NUTRITIVO
Varietal selection. Specialized plant breeding, plant breeding aims
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Summary:To investigate the relationship between rice genotypic variation in tolerance to iron (Fe) toxicity and nutrient element status, 10 rice genotypes with different growing performances under Fe toxicity were grown under normal culture solution and with excessive ferrous (Fe2+)-Fe concentrations of 250 and 500 mg Fe2+ L-1. A close relationship was obtained between the relative ratio of symptomatic leaf numbers to total leaf numbers (SLN/TLN) and a relative decrease in dry matter under Fe2+ -toxicity conditions. The genotypic variations in nitrogen (N), phosphorus (P), potassium (K), and magnesium (Mg) uptake were evaluated by the relative decrease in the N, P, K, and Mg content in the plants. Remarkable genotypic variation in tolerance to excessive Fe2+ was observed. The results indicated that excessive Fe2+ reduced N, P, K, and Mg uptake. The nutrient element concentrations, however, were still higher above deficient criteria even in severely affected plants, suggesting that the retardation of growth may not be intirely due to the deficiency of these elements in plants at the seedling stage. Significant correlations were found between the genotypic variation and the decrease in N, P, K, and Mg uptake and in their tolerance to Fe2+ toxicity, which suggests that the ability to maintain higher nutrient element uptake under a Fe2+-toxic condition contributes the tolerance to Fe2+ toxicity
ISSN:0190-4167
1532-4087
DOI:10.1080/01904169709365340