Effect of molecular complexity and acidity of earthworm faeces humic fractions on glutamate dehydrogenase, glutamine synthetase, and phosphoenolpyruvate carboxylase in Daucus carota ? II cells

Muscolo, Adele; Panuccio, Maria Rosaria; Abenavoli, Maria Rosa; Concheri, Giuseppe; Nardi, Serenella

doi:10.1007/bf00384437

Cited by 47 publications

(24 citation statements)

References 22 publications

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“…The capacity of HS auxin-like activity to induce root development in plants was first hypothesized by Concheri et al, (1996). This mechanism was further confirmed by Trevisan et al, (2009) using a mutant genotype (aux1) of Arabidopsis thaliana and specific inhibitors of auxin transport or action.…”

Section: Biological Activity Of Humic Substancesmentioning

confidence: 78%

Plant biostimulants: physiological responses induced by protein hydrolyzed-based products and humic substances in plant metabolism

Nardi

Pizzeghello

Schiavon

et al. 2016

Sci. agric. (Piracicaba, Braz.)

272

181

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In recent years, the use of biostimulants in sustainable agriculture has been growing. Biostimulants can be obtained from different organic materials and include humic substances (HS), complex organic materials, beneficial chemical elements, peptides and amino acids, inorganic salts, seaweed extracts, chitin and chitosan derivatives, antitranspirants, amino acids and other N-containing substances. The application of biostimulants to plants leads to higher content of nutrients in their tissue and positive metabolic changes. For these reasons, the development of new biostimulants has become a focus of scientific interest. Among their different functions, biostimulants influence plant growth and nitrogen metabolism, especially because of their content in hormones and other signalling molecules. A significant increase in root hair length and density is often observed in plants treated with biostimulants, suggesting that these substances induce a "nutrient acquisition response" that favors nutrient uptake in plants via an increase in the absorptive surface area. Furthermore, biostimulants positively influence the activity and gene expression of enzymes functioning in the primary and secondary plant metabolism. This article reviews the current literature on two main classes of biostimulants: humic substances and protein-based biostimulants. The characteristic of these biostimulants and their effects on plants are thoroughly described.

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Section: Biological Activity Of Humic Substancesmentioning

confidence: 78%

Plant biostimulants: physiological responses induced by protein hydrolyzed-based products and humic substances in plant metabolism

Nardi

Pizzeghello

Schiavon

et al. 2016

Sci. agric. (Piracicaba, Braz.)

272

181

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“…Studies on biological activities of vermicompost derived humic substances, revealed that they had similar growthpromoting hormonal effect (Dell'Agnola and Nardi 1987; Nardi et al 1988;Muscolo et al 1993). The humic materials extracted from vermicomposts have been reported to produce auxin-like cell growth and nitrate metabolism in carrots (Daucus carota) (Muscolo et al 1996). Humates obtained from pig manure vermicompost increased growth of tomato (Atiyeh et al 2002) and those obtained from cattle, food and paper waste vermicompost increased the growth of strawberries and peppers (Arancon et al 2003a).…”

Section: Role Of Vermicompost In Plant Growth Promotionmentioning

confidence: 99%

Microbial Diversity of Vermicompost Bacteria That Exhibit Useful Agricultural Traits and Waste Management Potential

Pathma¹,

Sakthivel²

2014

Organic Agricultural Practices

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Vermicomposting is a non-thermophilic, boioxidative process that involves earthworms and associated microbes. This biological organic waste decomposition process yields the biofertilizer namely the vermicompost. Vermicompost is a finely divided, peat like material with high porosity, good aeration, drainage, water holding capacity, microbial activity, excellent nutrient status and buffering capacity thereby resulting the required physiochemical characters congenial for soil fertility and plant growth. Vermicompost enhances soil biodiversity by promoting the beneficial microbes which inturn enhances plant growth directly by production of plant growth-regulating hormones and enzymes and indirectly by controlling plant pathogens, nematodes and other pests, thereby enhancing plant health and minimizing the yield loss. Due to its innate biological, biochemical and physiochemical properties, vermicompost may be used to promote sustainable agriculture and also for the safe management of agricultural, industrial, domestic and hospital wastes which may otherwise pose serious threat to life and environment.

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“…Além disso, uma série de trabalhos tem encontrado uma atividade reguladora de crescimento de plantas nas substâncias húmicas (SH) isoladas do vermicomposto, muito semelhante à ação de auxinas e giberelinas (Albuzio et al, 1996;Dell'Agnola & Nardi, 1987;Nardi et al, 1991Nardi et al, , 1994Muscolo et al, 1996;Masciandaro et al, 1999).…”

Section: Introductionunclassified

“…Chen & Avaid (1990) (Adani et al, 1998), na presença de SH, evidencia, no entanto, uma ação mais geral sobre os mecanismos de absorção. O incremento da absorção de nutrientes proporcionado pelas SH em solução tem sido justificado pelo aumento da permeabilidade da membrana plasmática graças à ação surfactante e ativação da H + -ATPase da membrana plasmática por SH de baixo peso molecular (essencialmente ácidos fúlvicos) (Nardi et al, 1991;Varanini et al 1993). Por exemplo, Visser (1989) indica o aumento da permeabilidade da membrana plasmática como responsável pelo maior status nutricional celular.…”

Section: Introductionunclassified

Estímulo no crescimento e na hidrólise de ATP em raízes de alface tratadas com humatos de vermicomposto: I - efeito da concentração

Rodda

Canellas²,

Façanha³

et al. 2006

Rev. Bras. Ciênc. Solo

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Foi observado aumento na matéria fresca e seca do sistema radicular, bem como no número de sítios de mitose, raízes emergidas do eixo principal, na área e no comprimento radiculares, com o uso do humato na concentração de 25 mg L -1 de C. Também foi observado, nessa concentração, aumento significativo na hidrólise de ATP pelas bombas de H + , responsáveis pela geração de energia necessária à absorção de íons e pelo crescimento celular.

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Effect of molecular complexity and acidity of earthworm faeces humic fractions on glutamate dehydrogenase, glutamine synthetase, and phosphoenolpyruvate carboxylase in Daucus carota ? II cells

Cited by 47 publications

References 22 publications

Plant biostimulants: physiological responses induced by protein hydrolyzed-based products and humic substances in plant metabolism

Plant biostimulants: physiological responses induced by protein hydrolyzed-based products and humic substances in plant metabolism

Microbial Diversity of Vermicompost Bacteria That Exhibit Useful Agricultural Traits and Waste Management Potential

Estímulo no crescimento e na hidrólise de ATP em raízes de alface tratadas com humatos de vermicomposto: I - efeito da concentração

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