Direct and indirect effects of glomalin, mycorrhizal hyphae and roots on aggregate stability in rhizosphere of trifoliate orange

Wu, Qiang‐Sheng; Cao, Ming-Qin; Zou, Ying-Ning; He, Xinhua

doi:10.1038/srep05823

Cited by 174 publications

(104 citation statements)

References 47 publications

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“…While, easily-extractable glomalin is extracted with 20 mM citrate (pH 7.0) for 30 min at 121°C and 0.11 Mpa. Later, Koide and Peoples (2013) and Wu et al (2014a) divided GRSP into two fractions, easily-extractable glomalin-related soil protein (EE-GRSP) and difficultlyextractable glomalin-related soil protein (DE-GRSP). Meanwhile, EE-GRSP is considered as a newly synthesized glomalin and relatively more labile, while DE-GRSP is comparatively an older glomalin originated from EE-GRSP turnover and more difficult to extract and recalcitrant in soils.…”

Section: Discovery and Origin Of Glomalinmentioning

confidence: 99%

“…GRSP functionings on soil aggregation, SOC pools, and water relation are delineated through regression analysis and path coefficient analysis (Wright and Upadhyaya, 1998;Fokom et al, 2012;Wu et al, 2012Wu et al, , 2014a. However, these studies considered only GRSP-induced changes in soil properties through the evaluation of endogenous GRSP levels.…”

Section: Functioning Of Exogenous Grspmentioning

confidence: 99%

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Glomalin: A Potential Soil Conditioner for Perennial Fruits

Zou¹,

Srivastava²,

Wu³

2016

IJAB

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Glomalin, a special glycoprotein secreted by hyphae and spore walls of arbuscular mycorrhizal fungi (AMF), possesses some diverse characteristics, of them its hydrophobic nature and stability to heat are most profound. Glomalin sloughs off cementing material following the hyphal degradation that coat soil organic matter and soil particles, thereby, forming a protective surface layer against loss of water and nutrients from soil aggregates. These properties of glomalin would influence plant and/or soil water relations. Assessed through Braford assay, glomalin contains proteins of non-AMF and AMF origin, in addition to large amount of soil-related heat-stable proteins, collectively defined as glomalin-related soil protein (GRSP) in soils. In perennial fruits, GRSP concentration has been observed up to 1 mg/g DW soil, which is strongly affected by physiography, soil management practices, and season. GRSP represents a type of glue agent that stabilizes soil aggregates, as one of the fractions of soil organic matter in perennial fruit orchards. There is an increasing demand to discern whether the functionings of exogenous GRSP application is similar to those of endogenously synthesized GRSP. These accrued results provide strong support in favour of glomalin as a potential soil conditioner that holds promise in perennial fruits. This review also makes an attempt to address the future lines of research on glomalin-related issues.

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Section: Discovery and Origin Of Glomalinmentioning

confidence: 99%

Section: Functioning Of Exogenous Grspmentioning

confidence: 99%

Glomalin: A Potential Soil Conditioner for Perennial Fruits

Zou¹,

Srivastava²,

Wu³

2016

IJAB

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“…Others propose that aggregates are stabilized by roots first and mycorrhizae second (Daynes et al 2013). Arbuscular mycorrhizal fungi (AMF) abundance has been linked to aggregate stability v www.esajournals.org values (Rillig et al 2002, Wilson et al 2009, Wu et al 2014, and 80% of plant species associate with AMF (Smith and Read 2008). Others have speculated that AMF colonization, and presumably AMF abundance, declines with increasing intensity of herbivory (Wallace 1987, Gehring andWhitham 2002).…”

Section: Introductionmentioning

confidence: 99%

Soil aggregate stability was an uncertain predictor of ecosystem functioning in a temperate and semiarid grassland

et al. 2015

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Abstract. We estimate rangeland managers assessing ecosystem health have measured soil stability .800,000 times. Our aim was to use quantitative data from a site in the Northern Great Plains, USA and a semi-quantitative literature search to demonstrate the robustness of soil stability as an indicator of ecosystem functioning. Empirical data included measurements of plant and soil properties along a local livestock grazing gradient to determine whether soil stability (e.g., % water-stable aggregates) explained primary productivity and soil water transport for a mixed-grass prairie site in the Northern Great Plains. We measured: annual net primary productivity (ANPP), elevation, % soil moisture, measures of soil stability, and soil water transport (field-saturated infiltrability and sorptivity) across points spanning a local gradient in livestock grazing intensity (none vs. light to moderate stocking rates; mean distance separating points ¼ 39.9 m [range ¼ 5.2-71.3 m]). Across the sampled gradient, variation in ANPP was best explained by a model with field-saturated infiltrability and % soil moisture. Infiltrability explained slightly more of the variation. We then determined that moderate amounts of variation in infiltrability were explained by ANPP, % soil moisture, and % water-stable aggregates. We determined that most of this variation was explained by ANPP and then soil moisture. Our empirical findings indicate that plant production was correlated with infiltration though we could not determine whether variation in plant production was caused by variation in infiltration or vice versa. We generally failed to show that soil stability (e.g., % waterstable aggregates) was a useful predictor of primary productivity and soil water transport. Our semiquantitative literature review also indicated that soil stability was not a consistent predictor of either plant production or infiltration. The varying evidence reported here on whether soil stability is a predictor of ecosystem function illustrates the difficulty in identifying an indicator of ecosystem health that (1) is a predictor of ecosystem function across grassland types, (2) is sensitive to rangeland management, and (3) can be easily implemented by non-experts.

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“…Glomalin-related soil protein (GRSP). GRSP is considered as a glue agent of soil aggregate stability (Wu et al 2014a(Wu et al , 2015a. In the M chamber, significantly higher EE-GRSP ranked in the order: F. mosseae ≥ A. scrobiculata > non-AMF, indicating that AMF inoculation stimulated greater synthesis in EE-GRSP, since EE-GRSP is comparatively newly produced by hyphae and spores of AMF (Wu et al 2015a).…”

mentioning

confidence: 99%