Effect of humic substances on mitochondrial respiration and oxidative phosphorylation

Visser, S. A.

doi:10.1016/0048-9697(87)90521-3

Cited by 46 publications

(30 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This observation would suggest the existence of an adaptability to humus-rich soil conditions in plants that only slightly react to the treatment with the humic substances (Ernst et al 1987). This has already been suggested for soil microorganisms (Visser 1985). The effects caused by humic substances on growth and nutrition were observed not only in hydroponics, but also when plants were grown on sand (Levesque 1970) or soil, especially those with low organic matter contents (Lee and Barlett 1976;Fagbenro and Agboola 1993), and in callis in vitro cultures (Irintoto et al 1993).…”

Section: Effect On Growth and Nutrient Contents Of Plantsmentioning

confidence: 87%

“…Flaig and Riemer (1971), using a synthetic humic acid, suggested that humic substances partially uncouple oxidative phosphorylation, thereby decreasing the cellular ATP content. Visser (1987) showed that short-time contact between rat liver mitochondria and humic acids caused uncoupling of respiration from oxidative phosphorylation. A 30-40% decrease of the cellular ATP content, without a parallel increase in oxygen consumption, has recently been observed by Nardi et al (1991) in roots of oat seedlings which had been treated with low and high molecular weight humic fractions.…”

Section: B) Energy Metabolismmentioning

confidence: 99%

See 1 more Smart Citation

Humic Substances and Plant Nutrition

Varanini¹,

Pinton²

1995

Progress in Botany

View full text Add to dashboard Cite

Section: Effect On Growth and Nutrient Contents Of Plantsmentioning

confidence: 87%

Section: B) Energy Metabolismmentioning

confidence: 99%

Humic Substances and Plant Nutrition

Varanini¹,

Pinton²

1995

Progress in Botany

View full text Add to dashboard Cite

“…Na planta, as substâncias húmicas podem promover uma parcial fosforilação oxidativa nas mitocôndrias e atuarem como reguladores de crescimento, aumentando a produção de biomassa (Visser, 1987;Canellas et al, 2002). Silva et al (2007), trabalhando com Macrotyloma axillare, verificaram que a maior produção obtida nos tratamentos que receberam esterco bovino foi devido às melhorias das propriedades físicas químicas e biológicas do solo, uma vez que os nutrientes foram aplicados na forma inorgânica em todos os tratamentos estudados.…”

unclassified

Calagem e adubação orgânica na produção de biomassa e óleo essencial em Lippia citriodora (Kunth)

Souza

Gomes

et al. 2010

Rev. bras. plantas med.

View full text Add to dashboard Cite

RESUMO:O presente trabalho objetivou avaliar a calagem e adubação orgânica na produção de biomassa e óleo essencial em Lippia citriodora Kunth. O delineamento experimental utilizado constou de fatorial 7 x 2, sendo sete tratamentos (testemunha; adição de sulfato de Ca e Mg; calcário dolomítico; silicato de Ca e Mg; sulfato de Ca e Mg + esterco de curral; calcário dolomítico + esterco de curral; silicato de Ca e Mg + esterco de curral) e duas épocas de colheita, com quatro repetições, inteiramente casualizado (DIC). Verificou-se que a correção do solo mostrouse prática necessária para o desenvolvimento da Lippia citriodora. Independentemente da época de colheita, a produção de massa fresca e seca foi maior com a aplicação do esterco de curral (32 t ha -1 ), no entanto, isso não refletiu em maior rendimento de óleo essencial. Palavras-chave: calcário, silicato, adubação orgânicaABSTRACT: Liming and organic fertilization on Lippia citriodora (Kunth) phytomass and essential oil production. The present work aimed to evaluate the effect of liming and bovine fertilization on Lippia citriodora Kunth phytomass and essential oil production. The experimental design was completely randomized with seven treatments (control; Ca and Mg sulfate; limestone; Ca and Mg silicate; Ca and Mg sulfate + manure; limestone + manure; Ca and Mg silicate + manure) and two harvest seasons, with four replicates. Soil adjustment showed to be a necessary procedure for Lippia citriodora development. Independently of the harvest season, fresh and dry matter yields were higher under treatments with bovine manure (32 t ha -1 ); however, no effect of treatments was observed on essential oil concentration.

show abstract

“…The petitioner stated that research indicates that humic acid is absorbed in vivo (Frimmel and Christman, 1988;Visser, 1987;Lind and Glynn, 1999;Lehninger et al, 1993).…”

Section: Bioavailabilitymentioning

confidence: 99%

Chromium(III)‐, iron(II)‐ and selenium‐humic acid/fulvic acid chelate and supplemented humifulvate added for nutritional purposes to food supplements

2009

EFS2

View full text Add to dashboard Cite

SUMMARYFollowing a request from the European Commission to the European Food Safety Authority, the Scientific Panel on Food Additives and Nutrient Sources added to Food was asked to evaluate the safety and bioavailability of iron(II)-, chromium(III)-and selenium-humic acid/fulvic acid chelate and of supplemented (dotated) humifulvate.The present opinion deals only with the safety and bioavailability of particular sources of chromium iron and selenium as such, or of a series of minerals (including potassium, magnesium, iron, zinc, manganese, copper, molybdenum and selenium) present in supplemented humifulvate intended for the general population, to be used in food supplements. The safety of iron, chromium and selenium and of the other minerals present in supplemented humifulvate in terms of amounts that may be consumed is outside the remit of this Panel. No data demonstrating the bioavailability of iron, chromium, selenium or any of the other mineral from their humic acid/fulvic acid chelates were provided.The petitioner indicates that when the free metal binding capacity of humic substances is saturated or contains a high concentration of a metal, then humic substances will transfer this metal to the protein type molecules that are able to bind it. The petitioner stated that if the free metal binding capacity is high, then humic substances will form complexes with metals that are free or attached to metalloproteins.The Panel concludes that the bioavailability of iron, chromium, selenium and other minerals from the humic acid/fulvic acid chelates (HFCs) and supplemented humifulvate has not been demonstrated, and that the actual level of saturation of the HFCs and supplemented (dotated) humifulvate has also not been characterised. Thus in theory, the bioavailability of iron, chromium, selenium and other minerals from the HFC sources might be lower than that of other sources. It could also be assumed that the source may actually cause chelation of metals provided by other sources, resulting in reduced bioavailability of the metals. Therefore, the Panel concludes that the bioavailability of iron, chromium, selenium and other minerals from their humic acid/fulvic acid chelates might be limited or even absent, whereas the possibility that the source may reduce the bioavailability of the metals and nutrients from other sources in the diet cannot be excluded.The petitioner also indicated that humic acids are not easily definable compounds. Their place of origin may be more characteristic than the simple qualitative chemical analysis or any other investigation. Therefore, the Panel concludes that the specifications provided may only relate to the material described in the present Opinion originating from peat found primarily along the northern shores of Lake Balaton in Hungary.Exposure resulting from supplement use of 1 g iron(II)-humic acid/fulvic acid chelate (Fe(II)-HFC) will amount to 68 mg humic/fulvic acid and 7 mg iron(II) per day, amounting to 1.1 mg humic/fulvic acid/kg bw/day and 0.12 mg iron/kg bw/day for a 60...

show abstract

Effect of humic substances on mitochondrial respiration and oxidative phosphorylation

Cited by 46 publications

References 1 publication

Humic Substances and Plant Nutrition

Humic Substances and Plant Nutrition

Calagem e adubação orgânica na produção de biomassa e óleo essencial em Lippia citriodora (Kunth)

Chromium(III)‐, iron(II)‐ and selenium‐humic acid/fulvic acid chelate and supplemented humifulvate added for nutritional purposes to food supplements

Contact Info

Product

Resources

About