Three New Records of <i>Mortierella</i> Species Isolated from Crop Field Soil in Korea

Yadav, Dil Raj; Kim, Sang Woo; Um, Yong Hyun; Kim, Hyun Seung; Kim, Changmu; Lee, Hyang Burm; Lee, Youn Su

doi:10.5941/myco.2015.43.3.203

Cited by 18 publications

(8 citation statements)

References 15 publications

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“…Fewer details of metabolism and ecology are available for non-pathogenic fungal indicators. Mortierella , the most common genus among fungal indicators in this study, are known to be a large genus of saprotrophs [55]. Exophiala equina and Didymella sp.…”

Section: Discussionmentioning

confidence: 99%

Agricultural management and plant selection interactively affect rhizosphere microbial community structure and nitrogen cycling

et al. 2019

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BackgroundRhizosphere microbial communities are key regulators of plant performance, yet few studies have assessed the impact of different management approaches on the rhizosphere microbiomes of major crops. Rhizosphere microbial communities are shaped by interactions between agricultural management and host selection processes, but studies often consider these factors individually rather than in combination. We tested the impacts of management (M) and rhizosphere effects (R) on microbial community structure and co-occurrence networks of maize roots collected from long-term conventionally and organically managed maize-tomato agroecosystems. We also explored the interaction between these factors (M × R) and how it impacts rhizosphere microbial diversity and composition, differential abundance, indicator taxa, co-occurrence network structure, and microbial nitrogen-cycling processes.ResultsHost selection processes moderate the influence of agricultural management on rhizosphere microbial communities, although bacteria and fungi respond differently to plant selection and agricultural management. We found that plants recruit management-system-specific taxa and shift N-cycling pathways in the rhizosphere, distinguishing this soil compartment from bulk soil. Rhizosphere microbiomes from conventional and organic systems were more similar in diversity and network structure than communities from their respective bulk soils, and community composition was affected by both M and R effects. In contrast, fungal community composition was affected only by management, and network structure only by plant selection. Quantification of six nitrogen-cycling genes (nifH, amoA [bacterial and archaeal], nirK, nrfA, and nosZ) revealed that only nosZ abundance was affected by management and was higher in the organic system.ConclusionsPlant selection interacts with conventional and organic management practices to shape rhizosphere microbial community composition, co-occurrence patterns, and at least one nitrogen-cycling process. Reframing research priorities to better understand adaptive plant-microbe feedbacks and include roots as a significant moderating influence of management outcomes could help guide plant-oriented strategies to improve productivity and agroecosystem sustainability.

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Section: Discussionmentioning

confidence: 99%

Agricultural management and plant selection interactively affect rhizosphere microbial community structure and nitrogen cycling

et al. 2019

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“…Over the last two decades numerous studies indicated the occurrence of Mortierella species in diversified environments, e.g., rocks, caves, mines, asbestos fibers, rivers, lakes, plant tissues soils, and rhizospheres (including agricultural areas) at each latitude [4][5][6][7][8][9]. Recently, researches employing molecular methods revealed that not only the Aspergillus and Penicillium genera, but also Mortierella strains are the most abundant filamentous fungi in the soils around the world [10][11][12][13][14][15][16]. Moreover, the Mortierella omnipresence may be confirmed by in the environment the effects of 35-year application of an organic fertilizer to the agricultural soil in China (Anhui Province) in order to promote plant growth.…”

Section: From the Pioneering Microorganisms To The Important Agricultural Inoculants 21 Isolation And Identification Of Mortierella Spp Fmentioning

confidence: 99%

“…In turn, filamentous fungi with asseptate hyphae (coenocytic hyphae) belong to the Mortierellales order. Mortierella species form colonies often described as pale white, white or whitish (sometimes little dark whitish at the center) zonate, forming a typical rosette pattern [7,8,15,18,19]. In the course of time, the reverse side of the colonies may become yellowish.…”

Section: From the Pioneering Microorganisms To The Important Agricultural Inoculants 21 Isolation And Identification Of Mortierella Spp Fmentioning

confidence: 99%

Mortierella Species as the Plant Growth-Promoting Fungi Present in the Agricultural Soils

2020

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In the most recent scientific reports based on the DNA or RNA-analyses a widespread presence of the filamentous fungi, Mortierella in various environments has been shown. Some strains of this genus belong to the plant growth-promoting fungi (PGPF) and are found in the bulk soil, rhizosphere and plants tissues. These microorganisms are also often found in the extremely hostile environments, responsible for improving access to the bioavailable forms of P and Fe in the soils, the synthesis of phytohormones and 1-aminocyclopropane-1-carboxylate (ACC) deaminase, and last but not least the protection of agricultural plants from pathogens. Furthermore, earlier reports classified Mortierella spp. as the saprotrophic microorganisms isolated from the forest litter, and nowadays their status as a very valuable decomposers in the agricultural soils was confirmed. The key features like the ability to survive under very unfavorable environmental conditions and the utilization of carbon sources contained in polymers like cellulose, hemicellulose, chitin make these fungi efficient as the agricultural inoculants. The growing interest in the application of Mortierella spp. is mainly due to the potential use of this genus in the increase of the nutrient uptake efficiency, positive effect in crop protection against adverse conditions, and reduction of chemical fertilizers and pesticides applied. Moreover, activities of Mortierella species selected from the wild or cultivated plants influence the soil microbiota and support the performance of the beneficial microorganisms enhancing significantly crop yield.

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“…In addition to Penicillium and Aspergillus genera , Mortierella are very common filamentous fungi isolated from the environment [ 1 , 2 ]. The studies on soil ecology describing fungal diversity reported an occurrence of Mortierella strains in soil, rhizosphere, rivers, and lakes on different continents [ 3 , 4 , 5 , 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Indoleacetic Acid, Gibberellic Acid and ACC-Deaminase by Mortierella Strains Promote Winter Wheat Seedlings Growth under Different Conditions

Ozimek

Jaroszuk-Ściseł

Bohacz

et al. 2018

IJMS

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The endogenous pool of phytoregulators in plant tissues supplied with microbial secondary metabolites may be crucial for the development of winter wheat seedlings during cool springs. The phytohormones may be synthesized by psychrotrophic microorganisms in lower temperatures occurring in a temperate climate. Two fungal isolates from the Spitzbergen soils after the microscopic observations and “the internal transcribed spacer” (ITS) region molecular characterization were identified as Mortierella antarctica (MA DEM7) and Mortierella verticillata (MV DEM32). In order to study the synthesis of indoleacetic acid (IAA) and gibberellic acid (GA), Mortierella strains were grown on media supplemented with precursor of phytohormones tryptophan at 9, 15 °C, and 20 °C for nine days. The highest amount of IAA synthesis was identified in MV DEM32 nine-day-culture at 15 °C with 1.5 mM of tryptophan. At the same temperature (15 °C), the significant promoting effect (about 40% root and shoot fresh weight) of this strain on seedlings was observed. However, only MA DEM-7 had the ACC (1-aminocyclopropane-1-carboxylate) deaminase activity with the highest efficiency at 9 °C and synthesized IAA without tryptophan. Moreover, at the same conditions, the strain was confirmed to possess the strong promoting effect (about 40% root and 24% shoot fresh weight) on seedlings. Both strains synthesized GA in all tested terms and temperatures. The studied Mortierella strains had some important traits that led them to be considered as microbial biofertilizers components, improving plant growth in difficult temperate climates.

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Three New Records of Mortierella Species Isolated from Crop Field Soil in Korea

Cited by 18 publications

References 15 publications

Agricultural management and plant selection interactively affect rhizosphere microbial community structure and nitrogen cycling

Agricultural management and plant selection interactively affect rhizosphere microbial community structure and nitrogen cycling

Mortierella Species as the Plant Growth-Promoting Fungi Present in the Agricultural Soils

Synthesis of Indoleacetic Acid, Gibberellic Acid and ACC-Deaminase by Mortierella Strains Promote Winter Wheat Seedlings Growth under Different Conditions

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