Oxidation and reduction of Mn in acidic soils: Effect of temperature and soil pH

Sparrow, LA; Uren, N. C.

doi:10.1016/0038-0717(87)90073-3

Cited by 62 publications

(19 citation statements)

References 13 publications

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“…Tais resultados são causados pela precipitação do Mn no solo, em virtude do alto pH. Nesta condição, o Mn é encontrado no solo na forma de óxidos insolúveis e, conseqüentemente, apresentam baixa disponibilidade do elemento às plantas (Malavolta, 1986;Sparrow & Uren, 1987).…”

Section: Resultsunclassified

Efeito da aplicação de manganês no rendimento e na qualidade de sementes de soja

Mann

Resende²,

Silva-Mann

et al. 2002

Pesq. agropec. bras.

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Resumo -O desequilíbrio nutricional, principalmente dos micronutrientes, tem sido um dos fatores para perdas na produção de sementes. Esses nutrientes desempenham papel em rotas bioquímicas que garantem a formação de lipídeos, proteínas e ainda contribuem na estruturação das membranas celulares. O objetivo deste trabalho foi avaliar a influência da aplicação de Mn na folha e no solo, sobre o rendimento e a qualidade de sementes de soja, cultivares Conquista e Garimpo. A qualidade das sementes foi avaliada por meio de testes de germinação, envelhecimento artificial, condutividade elétrica, índice de velocidade de emergência e pela determinação dos teores de proteína e óleo. Verificaram-se aumentos na produtividade, na germinação, no vigor e nos teores de proteína e óleo das sementes e no teor de Mn na planta, nas duas formas de aplicação do Mn, com maior grau de eficiência da aplicação na folha.Termos para indexação: Glycine max, aplicação foliar, vigor da semente, solo, produtividade. Effect of manganese application on yield and seed quality of soybeanAbstract -The nutritional unbalance, mainly with micronutrients, has contributed for losses in seeds yields. These nutrients are carrying out in biochemistry paths responsible for metabolism of lipids, proteins, and structure in cells membranes. The objective of this work was to evaluate the influence of Mn application (leaf or soil) on yield and seed quality of two soybean cultivars, Garimpo and Conquista. Seed quality was assessed through germination test, accelerated ageing, electrical conductivity, emergence speed, protein and oil content. The application of Mn in the soil or sprayed on the leaves increased its content in plant tissue, improved seed quality by increasing its protein and oil content as well as its germination and vigor. The Mn sprayed on the leaves was more efficient than when this nutrient was applied in the soil.

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Section: Resultsunclassified

Efeito da aplicação de manganês no rendimento e na qualidade de sementes de soja

Mann

Resende²,

Silva-Mann

et al. 2002

Pesq. agropec. bras.

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“…For separation of the two processes. Sparrow & Uren (1987) suggested use of Na-azide for inhibition of microbial Mn oxidation. But in the present study, this approach failed as an overall decline in net Mn reductions was observed with Na-azide (data not shown).…”

Section: Discussionmentioning

confidence: 99%

Effect of a vesicular–arbuscular mycorrhizal fungus and rhizosphere micro‐organisms on manganese reduction in the rhizosphere and manganese concentrations in maize (Zea mays L.)

1991

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SUMMARYMaize {Zea mays L. cv. Tau) plants were grown in a calcareous soil for six weeks in pots having separate compartments for growth of roots and vesicular-arbuscular (VA) mycorrhizal fungal hyphae. Soil was sterilized and either left non-inoculated (sterile treatment), or was inoculated with rhizosphere micro-organisms only (MO -VA) or with rhizosphere micro-organisms together with a VA mycorrhizal fungus [Glomus mosseae (Nicol. & Gerd.) Gerdemann & Trappe (MO-I-VA)]. Concentrations of Mn in roots and shoots, as well as exchangeable Mn in rhizosphere soil, decreased in the order MO -VA > MO-t-V.-^ > sterile treatment. In all treatments, the concentration of exchangeable Mn was lower in the rhizosphere soil (0-5 mm distance from the root surface) thati in the bulk soil (5-15 or 15-25 mm distance from the root surface). In the rhizosphere soil, the total microbial population was sitnilar in mycorrhizal (MO-l-VA) and non-mycorrhizal (MO -VA) treatments, but the proportion of Fe-or Mti-reducers was 20-to 30-fold higher in the non-mycorrhizal treatment, suggesting substantial qualitative changes in rhizosphere microbiai populations upon root infection with the mycorrhizal fungi. The Mn^'''-reducing potential (net balance between reduction and oxidation) in the rhizosphere soil was also distinctly lower in mycorrhizal treattnent compared to non-mycorrhizal tt-eatment.In the sterile treatment, low Mn*'^ -reducing potential and correspondingly low concentration of exchangeable Mn in soil, compared to the other treatments, indicates the importance of micro-organisms in Mn reduction in soil and acquisition of Mn by plants. Therefore, the lower Mn concentrations in mycorrhizal plants are most probably caused by a shift in composition and activity of rhizosphere micro-organisms. As a side effect of the treatments, improved soil aggregation, as indicated by soil adhering to the nylon net (facing hyphal compartments) after platit harvest, occurred in non-mycorrhizal and sterile treatments but not in the mycorrhizal treatment.

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“…Mn level in a soil is controlled by Mn availability in soil, pH and electron availability (Adams, 1981;Sparow and Uren, 1987). Soil with high Mn availability can cause Mn toxicity in soil pH below 6.0 (Hue et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

Response of Some Soybean Germplasm to Mangan Toxicity

Kuswantoro¹

2015

IJB

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In excessive manner, mangan (Mn) as an essential nutrient can be toxic to the plant. This phenomenon often occurs in acid soil. Hence, it is needed gene resources to develop plant in acid soil. The soybean germplasm tolerance to Mn toxicity was tested in seed laboratory, using two factors experimental design. The first factor was Mn toxicity containing two treatments (1) 0 ppm Mn in pH 7 as control, and (2) solution concentration of 75 ppm Mn in pH 4. The second factor was 14 accessions of soybean germplasm. Results showed that generally root characters decreases while shoot characters increased in Mn toxicity condition. However, some genotypes showed different performance. There was one genotype having the highest root dry weight in Mn toxicity condition, i.e. MLGG 0091. The highest root dry weight in this genotype was also supported by the root length and number of roots. MLGG 0091 was also capable to increase the length epicotyle that contribute to the increase in seedling dry weight. Therefore MLGG 0091 can be used as a gene source for tolerance to Mn toxicity.

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Oxidation and reduction of Mn in acidic soils: Effect of temperature and soil pH

Cited by 62 publications

References 13 publications

Efeito da aplicação de manganês no rendimento e na qualidade de sementes de soja

Efeito da aplicação de manganês no rendimento e na qualidade de sementes de soja

Effect of a vesicular–arbuscular mycorrhizal fungus and rhizosphere micro‐organisms on manganese reduction in the rhizosphere and manganese concentrations in maize (Zea mays L.)

Response of Some Soybean Germplasm to Mangan Toxicity

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