Investigating organic molecules responsible of auxin-like activity of humic acid fraction extracted from vermicompost

Scaglia, Barbara; Nunes, Ramom Rachide; Rezende, Maria Olímpia de Oliveira; Tambone, Fulvia; Adani, Fabrizio

doi:10.1016/j.scitotenv.2016.03.212

Cited by 85 publications

(62 citation statements)

References 35 publications

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“…Recent studies have demonstrated that the features of the HA chemical structure are a driving stimulus for hormone activity and root proliferation ( García et al, ; Scaglia et al., ; Olaetxea et al, ). The chemical structure of HA recorded by the ATR‐FTIR spectrum showed aliphatic C and a variety of aromatic C groups, as well as other stretching and bending vibrations (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…According to García et al (), the functional groups of HAs (FTIR spectrum) positively correlated with rice root parameters were –OH, –CH, C=O, C=C, aromatic‐CH, and C–O. Auxin‐like activity in a study with lettuce cultivation was also related to the presence of amino acids and carboxylic acids from both aliphatic and aromatic C in diverse HAs extracted from vermicomposts ( Scaglia et al, ). Maize lateral root growth was also associated with HA structure at absorbance bands attributed to aliphatic C and aromatic C groups recorded by diffuse reflectance infrared Fourier transform spectroscopy (DRIFT) spectrum ( Aguiar et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, HA use in soil stimulates root and shoot growth, as well as nutrient acquisition by plants (Nardi et al, 2016). Studies with HA have found that these effects are particularly associated with hormonal changes in plants, mainly auxinlike effects (Jindo et al, 2012;Zandonadi et al, 2014;Scaglia et al, 2016), and enhancement of H + -ATPase activity (Rima et al, 2011). The HA-dependent activation of H + -ATPase in root cells alters the profile of low molecular weight organic acid exudation, increases the release of protons to outside the cell, and reduces the pH of the surrounding medium (Canellas et al, 2008;Rima et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Wheat nutrition and growth as affected by humic acid‐phosphate interaction

Rosa

Silva

Maluf

2018

J. Plant Nutr. Soil Sci.

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Low‐grade phosphate rock correctly combined with humic acid (HA) has the capacity of single superphosphate (SS) in supplying P to growing wheat (Triticum aestivum L.). The aim of this study was to evaluate wheat dry matter, macro‐ and micronutrients accumulated in wheat shoot, and the P availability in a Typic Hapludox (Oxisol) under the following humic acid carbon (C‐HA) concentrations: 0, 5, 10, 50, and 100 mg kg−1, which were combined with two P sources, Araxá phosphate rock (APR) and SS. The experiment was carried out under greenhouse conditions. Firstly, soil samples were incubated with combinations of C‐HA concentrations and P sources for 15 d; after that, wheat was grown in the pots for 43 d. Shoot dry matter (SDM), root dry matter (RDM), total dry matter (TDM), macro‐ and micronutrient uptake, and soil resin‐P were determined. Addition of C‐HA increased RDM growth in soils treated with APR and SS, and improved SDM growth under APR. Accumulation of P, S, Cu, Fe, Mn, and Zn increased in wheat shoots grown in soils treated with APR combined with C‐HA concentrations. The addition of 50 mg kg−1 of C‐HA and APR increased RDM and macro‐ and micronutrient uptake and promoted greater production of SDM in comparison to biomass produced in soil not treated with HA. After wheat cultivation, resin‐P contents in soil with APR decreased over C‐HA concentrations, which is evidence of adequate supply of P to wheat by APR. The right combination of HA and APR leads to wheat growth and nutrient uptake equivalent to those found for SS.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wheat nutrition and growth as affected by humic acid‐phosphate interaction

Rosa

Silva

Maluf

2018

J. Plant Nutr. Soil Sci.

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“…In addition, increases in growth and yield could be attributed to plant growth regulators produced by microorganisms during the enhanced decomposition process [59]. Canellas et al [60] and Scaglia et al [61] referred to the occurrence of humates or hormones into vermicompost, since exchangeable auxin groups in humic acids were detected. An interesting point in the current study are the increases in total soluble solids in tomato fruits, which are rather related to the incorporation of spearmint into the soil than the disease pressure in both fungi ( Table 7).…”

Section: Effect Of Incorporation Of Aromatic Plants At Tomato Cultivamentioning

confidence: 99%

Mentha and Oregano Soil Amendment Induces Enhancement of Tomato Tolerance against Soilborne Diseases, Yield and Quality

et al. 2020

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Tomato is considered among the most important horticulture crops in both temperate and tropical regions, and two of the major biotic stresses include Fusarium oxysporun f.sp. lycopersici (Fol) and Verticillium dahliae (Vd). The effect of soil incorporated spearmint and oregano dried plant material on physiological, yield and quality parameters of tomato, along with their efficacy against soilborne fungal diseases, was studied in pot experiments conducted in a greenhouse environment. Tomato plants grown in soil amended with spearmint or oregano showed better agronomical characteristics (taller plants with thicker stems) and improved physiological ones (higher chlorophyll content index and photosynthetic rate). Yield was increased and the qualitative features of tomato fruits were enhanced. In addition, plants grown in soil amended with spearmint or oregano and inoculated with Fol or Vd had no visual disease symptoms 50 days from the inoculated tomato transplantation, except from plants grown in soil amended with oregano and inoculated with Fol, which showed symptoms of chlorosis and leaves loss. These enhancements on physiological parameters and on disease suppression resulted in increased fruit yields of plants–grown in soil amended with spearmint and oregano and inoculated with Fol or Vd–by 77%–95% compared with free-disease controls. GC-MS analysis of volatiles derived from soils amended of either spearmint or oregano indicated that several constituents remained in the soil environment long after incorporation of plant material, although, at lower concentrations and considerable modified. The current study reveals that direct incorporation of spearmint or oregano plant material into the soil could improve tomato tolerance against soilborne fungi, soil fertility and consequently increase yield and product quality.

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“…Sobre este aspecto, Canellas y Olivares (2014) comprobaron que la fuente de los AH incide sobre el efecto de los mismos sobre el crecimiento vegetal, mostrando una mayor capacidad estimuladora del crecimiento por parte de sustancias extraídas a partir de sustratos compostados (turba, vermicompost), donde necesariamente han intervenido microorganismos. Adicional a esto, Scaglia et al (2016) resaltan el efecto de "actividad hormonal inducida" por AH obtenidos a partir de vermicompost, sosteniendo que el mismo es una buena fuente de sustancias estimuladoras del crecimiento vegetal, las cuales derivan, por un lado, de las transformaciones mecánicas que realizan las lombrices sobre su alimento y por otro lado, de las modificaciones químicas que hacen los microorganismos asociados al tubo digestivo de ésta sobre la materia orgánica que está siendo digerida. No obstante, Trevisán et al (2010) plantean que además de la fuente, deben considerarse otros factores, tales como la concentración de SH, la especie vegetal utilizada, la edad de la misma y las condiciones de cultivo.…”

Section: Resultados Y Discusiónunclassified

Metodología Sencilla para Evaluar Bioactividad de Ácidos Húmicos obtenidos de Lignito Mediante Extracción Alcalina y Bacterias Solubilizadoras de Carbón

2018

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En este trabajo se probó un test rápido para evaluar la bioactiviad de ácidos húmicos (AH) obtenidos a partir de un carbón lignito a través de dos métodos: 1) mediante extracción química con NaOH (AH-Q) y 2) mediante actividad de una cepa bacteriana (Enterobacter aerogenes). Para ello se determinó la capacidad de los AH para ocasionar la elongación celular en coleóptilos de trigo, así como la capacidad para inducir la proliferación y alargamiento de raíces a partir de semillas pregerminadas. Se probaron concentraciones de AH entre 2,0 y 120 mg C. L-1 tomando como referencia el efecto ocasionado por una solución de AIA 2,0 mgL-1. Se encontró que el tratamiento con AH-Q a 40 mg C.L-1 ocasionó un mayor alargamiento de coleóptilos y raíces, mientras que una concentración de 20 mg C.L-1 de AH-B presentó bioactividad superior en todos los parámetros evaluados. Los resultados indican que los AH evaluados presentan bioactividad que depende del tipo de extracción y de la concentración aplicada.

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Investigating organic molecules responsible of auxin-like activity of humic acid fraction extracted from vermicompost

Cited by 85 publications

References 35 publications

Wheat nutrition and growth as affected by humic acid‐phosphate interaction

Wheat nutrition and growth as affected by humic acid‐phosphate interaction

Mentha and Oregano Soil Amendment Induces Enhancement of Tomato Tolerance against Soilborne Diseases, Yield and Quality

Metodología Sencilla para Evaluar Bioactividad de Ácidos Húmicos obtenidos de Lignito Mediante Extracción Alcalina y Bacterias Solubilizadoras de Carbón

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