Effects of duration and intensity of aluminum stress on growth parameters in four rice genotypes differing in aluminum sensitivity

• Published in: Journal of plant nutrition Vol. 20; no. 1; pp. 181 - 193
• Main Authors: Costa de Macedo, C. (Universite catholique de Louvain, Louvain-la-Neuve, Belgium.), Kinet, J.M, Sint Jan, V. van
• Format: Journal Article
• Language: English
• Published: Philadelphia, NJ Taylor & Francis Group 1997; Taylor & Francis
• Subjects: Adaptation to environment and cultivation conditions; Agronomy. Soil science and plant productions; ALUMINIO; ALUMINIUM; Biological and medical sciences; CONTENIDO DE MATERIA SECA; FEUILLE; FITOTOXICIDAD; Fundamental and applied biological sciences. Psychology; Genetics and breeding of economic plants; GENOTIPOS; GENOTYPE; HOJAS; LARGURA; LONGUEUR; NECROSE; NECROSIS; ORYZA SATIVA; PHYTOTOXICITE; RACINE; RAICES; RESISTANCE AUX FACTEURS NUISIBLES; RESISTENCIA A AGENTES DANINOS; TALLO; TENEUR EN MATIERE SECHE; TIGE; Varietal selection. Specialized plant breeding, plant breeding aims; Performance evaluation; Monocotyledones; Growth; Artificial selection; Phytotron; Cereal crop; Tropical soil; Oryza sativa; Controlled environment study; Group IIIB metal; Gramineae; Angiospermae; Selection criterion; Adaptation; Acid soil; Soilless study; Intensity; Tropical crop; Genotype; Acidity; Aluminium; Duration; Stress; Screening; Edaphic factor; Sensitivity; Limiting factor; Poison; Parameter; Spermatophyta
• ISSN: 0190-4167; 1532-4087
• DOI: 10.1080/01904169709365241

The effects of aluminum (Al) stresses of varying intensities and durations on growth parameters were investigated in four Oryza sativa L. genotypes (two Al sensitive, two Al resistant). Our results support the current opinion that the use of only one parameter cannot easily account for differences in Al resistance, since Al concentration or stress duration can affect plant responses in opposite directions. For short stress duration (40 days) at Al 500 micromolar, weight parameters appear to be more discerning than length parameters Necrosis evaluation is a more reliable criterion for plants maintained for long time (80 days) in the presence of high Al concentrations (A1 1000 of 1500 micromolar)