The co-existence between DSE and AMF symbionts affects plant P pools through P mineralization and solubilization processes

Mónica, Ivana Florencia Della; Saparrat, Mario Carlos Nazareno; Godeas, Alicia Margarita; Scervino, José Martín

doi:10.1016/j.funeco.2015.04.004

Cited by 112 publications

(53 citation statements)

References 43 publications

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“…; Della Mónica et al . ). Probably, the constitutive and basal production of phosphatases could confer an adaptive advantage to colonization and growth in substrates with organic and inorganic P sources versus organisms that can use only one of both nutrients.…”

Section: Discussionmentioning

confidence: 97%

“…The mycelial dry weight (DW), collection of supernatants, pH recording and P quantification were achieved following the protocols described in Della M onica et al (2014). The activities of acid (sodium acetate buffer 0Á1 mol l À1 ; pH 5Á5) and alkaline (universal buffer 0Á1 mol l À1 (citric : phosphoric : boric acid 0Á03 mol l À1 ); pH 9Á0) phosphatases were measured spectrophotometrically (405 nm) using p-nitrophenylphosphate (2Á3 mmol l À1 ) as the substrate in aliquots from the supernatants of liquid cultures (Della M onica et al 2015). An enzymatic unit (EU) was defined as the amount of enzyme produced per gram of DW that hydrolyses 1 lmol p-nitrophenylphosphate per min in 1 ml of supernatant.…”

Section: Effect Of Ph On Fungal P Solubilization and Phosphatase Prodmentioning

confidence: 99%

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Fungal extracellular phosphatases: their role in P cycling under different pH and P sources availability

et al. 2017

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Aims: The aim of this work is to analyse the effect of pH, fungal identity and P chemical nature on microbial development and phosphatase release, discussing solubilization and mineralization processes in P cycling. Methods and Results: P solubilizing fungi (Talaromyces flavus, T. helicus L, T. helicus N, T. diversus and Penicillium purpurogenum) were grown under three pH conditions (6, 6Á5 and 8Á5) and with different inorganic (calcium, iron, aluminium and rock) and organic (lecithin and phytate) P sources. P solubilization, mineralization, growth and phosphatase production were recorded. Acid and neutral environments maximized fungal development and P recycling. P chemical nature changed the phosphatases release pattern depending on the fungal identity. Acid phosphatase activity was higher than alkaline phosphatases, regardless of pH or sample times. Alkaline phosphatases were affected by a combination of those factors. Conclusions: P chemical nature and pH modify fungal growth, P mineralization and solubilization processes. The underlying fungal identitydependent metabolism governs the capacity and efficiency of P solubilization and mineralization. P solubilization and mineralization processes are interrelated and simultaneously present in soil fungi. Significance and Impact of the study: This study constitutes a reference work to improve the selection of fungal bioinoculants in different environmental conditions, highlighting their role in P cycling.

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Section: Discussionmentioning

confidence: 97%

Section: Effect Of Ph On Fungal P Solubilization and Phosphatase Prodmentioning

confidence: 99%

Fungal extracellular phosphatases: their role in P cycling under different pH and P sources availability

et al. 2017

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“…Estudios previos mostraron la importancia del estudio de las interacciones que involucran a los hongos saprobios del suelo y los HMA (Fracchia et al, 2004;Scervino et al, 2008;Scervino et al, 2009;Della Mónica et al, 2014, 2015. Estos microorganismos del suelo pueden influenciar en forma drástica la formación y desarrollo de la simbiosis de HMA, modificando así el efecto sobre el desarrollo de las plantas.…”

Section: Discussionunclassified

“…Esta cepa incrementó el crecimiento pre-infectivo y la eficiencia micorrícica en plantas de trigo . Estudios realizados con hongos endófitos septados oscuros, capaces de mineralizar y solubilizar distintas fuentes de P, mostraron que Phaeomollisia piceae interactúa con G. rosea incrementando la toma de P del suelo en trébol (Della Mónica et al, 2015). Nuestros resultados muestran que los exudados de T. diversus, incrementan significativamente la germinación de las esporas de G. rosea, mientras que los exudados de T. helicus N24, T. helicus L7B y P. purpurogenum no tienen un efecto neto sobre este parámetro.…”

Section: Discussionunclassified

“…El establecimiento de la simbiosis micorrícica puede estar influenciada por distintas vías a través de las poblaciones de microorganismos del suelo (Johansson et al, 2004;Scervino et al, 2009;Della Mónica et al, 2015). La etapa de crecimiento presimbiótico en los HMA, al igual que la germinación, puede ser influenciada por distintos factores y es crucial para el establecimiento de la colonización micorrícica (Akiyama & Hayashi, 2006;Scervino et al, 2007).…”

Section: Introductionunclassified

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Interacciones microbianas: Efecto de hongos biocontroladores y solubilizadores de fósforo en los estadios pre-simbióticos de hongos micorrícico arbusculares

Mónica¹,

Godeas²,

Scervino³

2018

Bol. Soc. Argent. Bot.

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El fósforo (P) es un macronutriente poco biodisponible para las plantas y por lo tanto, limitante para su crecimiento. El uso de hongos solubilizadores de P (HS) es una alternativa prometedora en el aprovechamiento de la fertilización fosforada. Sin embargo, aún no se ha establecido si los HS tienen efectossobre la micobiota benéfica del suelo, como los hongos micorrícico-arbusculares (HMA). Este trabajo estudia el efecto de HS con capacidad biocontroladora de fitopatógenos fúngicos sobre el desarrollo micorrícico preinfectivo de HMA, el primer paso en la colonización de la raíz, de los HMA. Se expusieron esporas del HMA Gigaspora rosea a distintas concentraciones de exudados (0; 0,01; 0,1; 1; 3%) de distintos HS: Talaromyces helicus cepa L7B, T. helicus cepa N24, T. diversus y Penicillium purpurogenum, en un sistema in vitro con medio semilíquido. Se evaluó la germinación de las esporas y la elongación, ramificación y morfología del micelio pre-infectivo. Se observó que solo T. diversus incrementó la germinación y que T. helicus L7B promovió la elongación, ramificación y modificó la morfología del micelio pre-infectivo del HMA sin afectarla germinación. Estos resultados demuestran que el desarrollo pre-infectivo de G. rosea (germinación, elongación, ramificación y morfología) puede ser modulado en función de la cepa de HS estudiada, sugiriendo que las interacciones microbianas podrían impactar positivamente sobre la nutrición fosforada vegetal mediante la modificación del estadio previo a la simbiosis micorrícica.

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Exploring the response of Actinobacteria to the presence of phosphorus salts sources: Metabolic and co‐metabolic processes

et al. 2019

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liquid media containing Ca 3 PO 4 ; AlPO 4 or FePO 4 as the sole phosphate source, and discusses the possible mechanisms involved in this process. P solubilization by different strains was accompanied by a significant drop in pH from 7.0 to 2.15-5.0 after 14 days. The efficiency of different strains depended on the P-source. Streptomyces spp. MM140 and MM141 were the most efficient in solubilizing Ca 3 PO 4 , MM136, and MM141 were the most efficient in solubilizing AlPO 4 , while all strains were equally efficient in solubilizing FePO 4 . Gluconic, oxalic, citric, malic, succinic, formic, and acetic acid were detected in the medium with Ca 3 PO 4 , while all except acetic acid were detected in the media with FePO 4 or AlPO 4 . Although we did not use an organic source of phosphorus in the media, all strains produced acid and alkaline phosphatase. It is concluded from this study that actinobacteria produced multiple organic acids followed by a decrease in the pH to solubilize phosphate salts.As well as producing phosphatase, these microorganisms were found to have different ways of making P available, suggesting an ecological advantage as they form part of soil microbiomes important for plants. K E Y W O R D Sactinobacteria, phosphate solubilization, organic acids, Streptomyces

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The co-existence between DSE and AMF symbionts affects plant P pools through P mineralization and solubilization processes

Cited by 112 publications

References 43 publications

Fungal extracellular phosphatases: their role in P cycling under different pH and P sources availability

Fungal extracellular phosphatases: their role in P cycling under different pH and P sources availability

Interacciones microbianas: Efecto de hongos biocontroladores y solubilizadores de fósforo en los estadios pre-simbióticos de hongos micorrícico arbusculares

Exploring the response of Actinobacteria to the presence of phosphorus salts sources: Metabolic and co‐metabolic processes

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