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Effect of manganese toxicity on growth and N 2 fixation in groundnut, Arachis hypogaea
Author(s) -
NAMBIAR P. T. C.,
ANJAIAH V.
Publication year - 1989
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1989.tb03394.x
Subject(s) - arachis hypogaea , biology , manganese , toxicity , nitrogen fixation , nutrient , fixation (population genetics) , dry matter , agronomy , nitrogen , botany , horticulture , ecology , chemistry , bacteria , biochemistry , genetics , organic chemistry , gene
Summary The development of manganese (Mn) toxicity symptoms and its effects on the growth, nodulation, and nitrogen fixation of groundnut genotypes were examined using a quartz‐sand/solution culture system. The 11 genotypes tested all accumulated considerable concentrations of manganese (1.04–3.07 mg g ‐1 dry matter) when supplied with 15 μg Mn ml ‐1 of nutrient solution daily. Toxicity symptoms differed between genotypes: some showed no visual effects, some produced marginal leaf spots, and others developed marginal leaf spots coupled with an inward rolling of the margins of the younger leaves. The growth of one genotype (ICG 5394) grown with inorganic nitrogen as its source of N was more severely affected by Mn toxicity than when dependent on symbiotic fixation for its nitrogen.