Arbuscular mycorrhizal fungal diversity, external mycelium length, and glomalin-related soil protein content in response to long-term fertilizer management

Dai, Ji; Hu, Junli; Lin, Xiangui; Yang, Anna; Wang, Rui; Zhang, Jiabao; Wong, Ming Hung

doi:10.1007/s11368-012-0576-z

Cited by 56 publications

(37 citation statements)

References 55 publications

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“…). Both, linear regression, stepwise regression, and SEM analysis have shown that soil K (total K and available K) was not relevant with GRSP amount, which was consistent with a previous study ( Dai et al, ). In all, our finding highlights the importance of SOC in regulating GRSP and followed by soil P, and soil N possibly indirectly affects GRSP via their close relations with SOC.…”

Section: Discussionsupporting

confidence: 91%

Glomalin amount and compositional variation, and their associations with soil properties in farmland, northeastern China

Zhong

Wang

et al. 2017

J. Plant Nutr. Soil Sci.

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Glomalin‐related soil protein (GRSP) is well‐known for its soil conditioning functions, but compositional traits are rarely considered. Farmland in northeastern China is the most important commercial grain basis, and soil degradation becomes the bottleneck for keeping crop productivity. The objective of this study was to uncover the possible associations between GRSP (amount and composition) and soil properties, and make suggestions for soil improvement from soil glomalin rehabilitation in northeastern China. Here, spatial variation in GRSP amount (Easily‐extractable‐GRSP, EE‐GRSP; Total‐GRSP, T‐GRSP) and its compositional traits from infrared spectroscopy, UV‐absorbance, X‐ray diffraction (XRD) and 3‐D fluorescence spectroscopy were surveyed in 360 soil samples across northeastern China, and their association with 11 soil properties were also analyzed for finding the possible influence of soil properties on GRSP composition in farmland. There about 3‐fold spatial variation in GRSP amount was observed, while functional group variations were ranged from 1.2‐fold (O–H & N–H stretching) to 2.4‐fold (C–O stretching & O–H bending of –COOH) in different locations. The XRD showed that grain size was 113–180Å and crystallinity was 0.71–1.42%, and GRSP contained seven fluorescent compounds of tyrosine‐like, tryptophan‐like, fulvic acid‐like, soluble microbial byproduct, humic acid‐like, nitrobenzoxadidole‐like, and calcofluor white‐like. Both, EE‐GRSP and T‐GRSP positively associated with soil organic carbon (SOC), soil N (SON), soil P (SOP), alkali‐hydrolyzed N (AN), available P (AP), available K (AK), and soil water, while negatively associated with soil pH and soil bulk density. Structural equation model (SEM) analysis indicates that direct effects on GRSP amounts were mainly from soil bulk density (coefficient: –0.27), soil pH (coefficients: –0.51 to –0.57), SOC (coefficients: 0.51 to 0.69) and AP (coefficients: 0.18 to 0.26), while all other soil properties had indirect effects on GRSP amounts via their close associations with these four parameters. Compared with the GRSP amounts, soil properties laid fewer effects on GRSP compositional traits. Of 16 compositional traits, five of them showed possible regulations from soil properties, which were three infrared functional groups (IR‐II: aliphatic C–H stretching; IR‐V: C–O stretching & O–H bending of –COOH; IR‐VII: O–H binding) and two fluorescent compounds (tyrosine‐like and humic acid‐like). SEM analysis indicates that soil water, pH and EC could directly affect IR‐II, IRV, tyrosine‐like and humic acid‐like, while available nutrients showed more evident influences on infra‐red functional groups than total amounts of N, P and K. Moreover, SOC, as a media of various soil nutrients, gave the strongest influence on GRSP compositional traits. As a supplement to previous studies, we found that GRSP is a mixture of different fluorescent compounds with different functional groups. Our findings highlight that soil properties could strongly change both GRSP accumulatio...

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Section: Discussionsupporting

confidence: 91%

Glomalin amount and compositional variation, and their associations with soil properties in farmland, northeastern China

Zhong

Wang

et al. 2017

J. Plant Nutr. Soil Sci.

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“…This may be due to increased soil fertility, since it reduces colonization and, therefore, extraradical mycelium (Dai et al, 2013). In relation to the classes of aggregates, TEM was greater in microaggregates, confirming that this class of aggregates has the highest spore density of AMF and that there is a positive correlation between TEM and the content of total glomalin (r = 0.88**).…”

Section: Resultsmentioning

confidence: 75%

Arbuscular mycorrhizal fungi in soil aggregates from fields of "murundus" converted to agriculture

Carneiro

Ferreira

Souza

et al. 2015

Pesq. agropec. bras.

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-The objective of this work was to evaluate the spore density and diversity of arbuscular mycorrhizal fungi (AMF) in soil aggregates from fields of "murundus" (large mounds of soil) in areas converted and not converted to agriculture. The experiment was conducted in a completely randomized design with five replicates, in a 5x3 factorial arrangement: five areas and three aggregate classes (macro-, meso-, and microaggregates). The evaluated variables were: spore density and diversity of AMF, total glomalin, total organic carbon (TOC), total extraradical mycelium (TEM), and geometric mean diameter (GMD) of soil aggregates. A total of 21 AMF species was identified. Spore density varied from 29 to 606 spores per 50 mL of soil and was higher in microaggregates and in the area with 6 years of conversion to agriculture. Total glomalin was higher between murundus in all studied aggregate classes. The area with 6 years showed lower concentration of TOC in macroaggregates (8.6 g kg -1) and in microaggregates (10.1 g kg -1). TEM was greater at the top of the murundus in all aggregate classes. GMD increased with the conversion time to agriculture. The density and diversity of arbuscular mycorrhizal spores change with the conversion of fields of murundus into agriculture.Index terms: diversity of arbuscular mycorrhizal fungi, geometric mean diameter, total glomalin, total mycelium, total organic carbon.

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“…Exogenous application of phosphorous fertilizer enhances population size, species richness, diversity of AMF, as well as the contents of glomalin-related soil protein (GRSP) and soil organic carbon. This suggests the key role of phosphorus in the maintainence of soil fertility as well as the diversity of AMF (Curaqueo et al, 2011;Dai et al, 2013). However, various factors (e.g., community structure, population size, external mycelium length, and GRSP content) directly or indirectly contribute to the soil AMF properties, thereby providing help in gaining information immediately and accurately about any kind of change in soil fertility status (Bedini et al, 2007;Alguacil et al, 2010;Ngosong et al, 2010).…”

Section: Effect Of Arbuscular Mycorrhizal Fungi On Soil Fertilitymentioning

confidence: 99%

Arbuscular Mycorrhiza in Crop Improvement under Environmental Stress

Ahanger¹,

Hashem²,

Abd_Allah³

et al. 2014

Emerging Technologies and Management of Crop Stress Tolerance

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Arbuscular mycorrhizal fungal diversity, external mycelium length, and glomalin-related soil protein content in response to long-term fertilizer management

Cited by 56 publications

References 55 publications

Glomalin amount and compositional variation, and their associations with soil properties in farmland, northeastern China

Glomalin amount and compositional variation, and their associations with soil properties in farmland, northeastern China

Arbuscular mycorrhizal fungi in soil aggregates from fields of "murundus" converted to agriculture

Arbuscular Mycorrhiza in Crop Improvement under Environmental Stress

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