Analysis of acid-soil stress in sorghum genotypes with emphasis on aluminium and magnesium interactions

Acid-soil stress in 12 sorghum (Sorghum bicolor (L.) Moench) genotypes was attributed mainly to aluminium (Al) toxicity. Root damage and magnesium (Mg) deficiency are two independent aspects of plant sensitivity to Al, either in acid soil or in nutrient solution. At moderate soil acidity, Mg deficie...

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Bibliographic Details
Published in:Plant and soil 1995-04, Vol.171 (1), p.147-150
Main Authors: Tan, K. (Landbouwuniversiteit Wageningen (Netherlands). Vakgroep Bodemkunde en Plantevoeding), Keltjens, W.G
Format: Article
Language:English
Subjects:
Acid soils
Adaptation to environment and cultivation conditions
Agronomy. Soil science and plant productions
ALUMINIO
ALUMINIUM
Aluminum
Biological and medical sciences
CARENCE MINERALE
DEFICIENCIA DE MINERALES
FITOTOXICIDAD
Flood damage
Fundamental and applied biological sciences. Psychology
Genetics and breeding of economic plants
GENOTIPOS
GENOTYPE
GENOTYPES
Liming
MAGNESIO
MAGNESIUM
MINERAL DEFICIENCIES
Nutrient solutions
PE&RC
PHYTOTOXICITE
PHYTOTOXICITY
Plant roots
Plants
Sectie Bodemkwaliteit
Sorghum
SORGHUM BICOLOR
Sub-department of Soil Quality
Varietal selection. Specialized plant breeding, plant breeding aims
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Summary:Acid-soil stress in 12 sorghum (Sorghum bicolor (L.) Moench) genotypes was attributed mainly to aluminium (Al) toxicity. Root damage and magnesium (Mg) deficiency are two independent aspects of plant sensitivity to Al, either in acid soil or in nutrient solution. At moderate soil acidity, Mg deficiency dominantly limited growth whilst at high acidity root damage overruled the effect of Mg deficiency on the growth response. In nutrient solutions containing Al, increased Mg supply improved both root development and Mg nutrition of plants, whereas increased calcium (Ca) supply, or nutrition with ammonium (NH₄) instead of nitrate (NO₃), alleviated root damage but amplified Mg deficiency. At lowered pH the syndrome of Al toxicity was more profound. The implications of Mg-Al interactions, root damage, Mg supply and genotype selection are elucidated.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF00009578