Interactions between arbuscular mycorrhizal fungi and phosphate-solubilizing fungus (Mortierella sp.) and their effects on Kostelelzkya virginica growth and enzyme activities of rhizosphere and bulk soils at different salinities

Zhang, Huanshi; Wu, Xianghua; Chen, Yingjie; Qin, Pei

doi:10.1007/s00374-011-0563-3

Cited by 162 publications

(81 citation statements)

References 75 publications

(77 reference statements)

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“…Mortierella alpina is a saprobe utilizing decaying organic matter (Wagner et al, 2013), and due to its ability to solubilize phosphorus also develops a mutualistic association with another fungal genus that forms mycorrhizal symbioses with sagebrush (Wicklow-Howard, 1994;Zhang et al, 2011). All 39 isolates tested by initiated freezing at −5 to −6 • C. They also typically released 10 8 to 10 9 small (< 10 nm) INPs per gram fresh weight of mycelium that nucleated between −5 and −8 • C (see O'Sullivan et al, 2015).…”

Section: In Fungimentioning

confidence: 99%

“…This high-temperature group may have been contributed by the diverse microflora that colonizes roots, from soil biological material still attached to the epidermis of the roots after washing, or from arbuscular mycorrhizal fungi and other microflora inhabiting the root cortex (Watson, 1987). Notably, one of the few fungal genera that form a mycorrhizal symbiosis with sagebrush also develops a mutualistic association with M. alpina (Wicklow-Howard, 1994;Zhang et al, 2011).…”

Section: Ice Nucleation By Sagebrush Tissuesmentioning

confidence: 99%

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Sources of organic ice nucleating particles in soils

et al. 2016

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Abstract. Soil organic matter (SOM) may be a significant source of atmospheric ice nucleating particles (INPs), especially of those active > −15 • C. However, due to both a lack of investigations and the complexity of the SOM itself, the identities of these INPs remain unknown. To more comprehensively characterize organic INPs we tested locally representative soils in Wyoming and Colorado for total organic By contrast, lysozyme, which digests bacterial cell walls, only reduced INPs active at ≥ −7.5 or ≥ −6 • C, depending on the soil. The known IN bacteria were not detected in any soil, using PCR for the ina gene that codes for the active protein. We directly isolated and photographed two INPs from soil, using repeated cycles of freeze testing and subdivision of droplets of dilute soil suspensions; they were complex and apparently organic entities. Ice nucleation activity was not affected by digestion of Proteinase K-susceptible proteins or the removal of entities composed of fulvic and humic acids, sterols, or aliphatic alcohol monolayers. Organic INPs active colder than −10 to −12 • C were resistant to all investigations other than heat, oxidation with H 2 O 2 , and, for some, digestion with papain. They may originate from decomposing plant material, microbial biomass, and/or the humin component of the SOM. In the case of the latter then they are most likely to be a carbohydrate. Reflecting the diversity of the SOM itself, soil INPs have a range of sources which occur with differing relative abundances.

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Section: In Fungimentioning

confidence: 99%

Section: Ice Nucleation By Sagebrush Tissuesmentioning

confidence: 99%

Sources of organic ice nucleating particles in soils

et al. 2016

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“…Queda por investigar en detalle si los cambios en la S de los grupos fúngicos estudiados (HMF, HSP-Fe y HSP-(Fe+Ca)) son importantes para la productividad del cultivo de café a nivel regional. Así mismo, se requiere de la evaluación de las interacciones entre aislamientos de HSP y de hongos de micorriza arbuscular (HMA), las cuales en algunas investigaciones han mostrado una respuesta sinérgica, promoviendo el crecimiento de las plantas gracias al mejor aprovechamiento del P (Osorio & Habte 2001, Zhang et al 2011. No obstante, en otros trabajos no se han encontrado respuestas positivas (Cabello et al 2005), lo que muestra la importancia de continuar con investigaciones básicas que profundicen en forma integral con los factores bió-ticos y abióticos involucrados con la diferentes comunidades fúngicas del suelo.…”

Section: Relaciones De La Intensidad De Manejounclassified

Relaciones entre los hongos filamentosos y solubilizadores de fosfatos con algunas variables edáficas y el manejo de cafetales

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Prager

Sieverding

et al. 2012

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Filamentous and phosphate solubilizing fungi relationships with some edaphic parameters and coffee plantations management. Soil properties and the environment have multiple outcomes on fungal communities. Although, the interaction effects between management intensity, pH, available phosphorus, organic carbon, soil texture and different fractions of water stable macro-aggregates on the communities of microscopic filamentous fungi (MFF), iron phosphate solubilizing fungi (PSF-Fe), and iron and calcium phosphate solubilizing fungi (PSF-(Fe+Ca)), have been previously evaluated in field conditions, this has never been performed in terms of their combined effects, neither with phosphate solubilizing fungi. To assess this, we collected 40 composite soil samples from eight Mexican and Colombian coffee plantations, with different management intensities and physico-chemical edaphic parameters, during [2008][2009]. We isolated different communities of MFF, PSFFe and PSF-(Fe+Ca), by wet sieving and soil particles culture in Potato-Dextrose-Agar from soil samples, and we classified isolates in terms of their phosphate solubilizing ability. Following the principal component analysis results, we decided to analyze fungal communities and abiotic factors interactions for each country separately. Structural Equation Models revealed that organic carbon was positively associated to MFF richness and number of isolates (λ>0.58), but its relationship with PSF-Fe and PSF-(Fe+Ca) were variable; while the available phosphorus, pH and water stable macro-aggregate fractions did not show a clear pattern. Management intensity was negatively related to PSF-Fe (λ≤-0.21) morphotype richness and the number of isolates in Colombian coffee plantations. We found that the relationships of clay and organic carbon content, and available phosphorus and soil pH, with the species richness and number of isolates of MFF, PSF-Fe and PSF-(Fe+Ca) were highly variable; this made impossible to generalize the responses between saprotrophic fungal groups and geographic zones. The management intensity was not related to species richness and number of isolates of MFF in any coffee areas, while for PSF the relationship could not be defined. The different water stable macro-aggregates fractions did not show a defined pattern in relation to the species richness and the number of isolates of saprophytic and phosphate solubilizing fungi (PSF). This study highlights the need to take into account edaphic and geographic context in order to reach a better understanding of the intensity management effects on MFF and PSF function in agroecosystems. Rev. Biol. Trop. 60 (3): 1075-1096. Epub 2012 September 01.

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“…Although, the present enzyme assays do not give valid information on the distribution and comparative importance of reactions mediated by microbes (Nannipieri et al 2002), soil microbial diversity can also affect enzyme activity (Nannipieri et al 2003). It has been reported that AM fungi can increase soil neutral phosphatase and alkaline phosphatase activities by altering the root exudation pattern or fungal exudates (Wang et al 2006(Wang et al , 2007Zhang et al 2011). In the present study, the activity of cellulase, phosphatase, and urease of soil-sand mixture were all significantly increased by earthworms (p<0.05), confirming what has already been reported.…”

Section: Discussionmentioning

confidence: 99%