Dynamics of arbuscular mycorrhizal fungi and glomalin in the rhizosphere of Artemisia ordosica Krasch. in Mu Us sandland, China

He, Xueli; Li, Yingpeng; Zhao, Lili

doi:10.1016/j.soilbio.2010.03.022

Cited by 66 publications

(31 citation statements)

References 50 publications

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“…In the study site, soil moisture and TOC were lower, but plant species richness was much higher at lower elevation compared with the higher elevation (Supplementary Table S1). These results suggested that AM fungal spore density may be affected by plant species diversity and soil moisture and TOC, as reported in previous studies37383940.…”

Section: Discussionsupporting

confidence: 87%

Arbuscular mycorrhizal fungal community composition affected by original elevation rather than translocation along an altitudinal gradient on the Qinghai-Tibet Plateau

Yang

Zheng

Gao

et al. 2016

Sci Rep

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Elucidating arbuscular mycorrhizal (AM) fungal responses to elevation changes is critical to improve understanding of microbial function in ecosystems under global asymmetrical climate change scenarios. Here we examined AM fungal community in a two-year reciprocal translocation of vegetation-intact soil blocks along an altitudinal gradient (3,200 m to 3,800 m) in an alpine meadow on the Qinghai-Tibet Plateau. AM fungal spore density was significantly higher at lower elevation than at higher elevation regardless of translocation, except that this parameter was significantly increased by upward translocation from original 3,200 m to 3,400 m and 3,600 m. Seventy-three operational taxonomic units (OTUs) of AM fungi were recovered using 454-pyrosequencing of 18S rDNA sequences at a 97% sequence similarity. Original elevation, downward translocation and upward translocation did not significantly affect AM fungal OTU richness. However, with increasing altitude the OTU richness of Acaulosporaceae and Ambisporaceae increased, but the OTU richness of Gigasporaceae and Glomeraceae decreased generally. The AM fungal community composition was significantly structured by original elevation but not by downward translocation and upward translocation. Our findings highlight that compared with the short-term reciprocal translocation, original elevation is a stronger determinant in shaping AM fungal community in the Qinghai-Tibet alpine meadow.

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Section: Discussionsupporting

confidence: 87%

Arbuscular mycorrhizal fungal community composition affected by original elevation rather than translocation along an altitudinal gradient on the Qinghai-Tibet Plateau

Yang

Zheng

Gao

et al. 2016

Sci Rep

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“…2) was comparable to those found in grassland (3.77–7.84%) 40, 41 , farmland (2.79–6.97%) 42, 43 and forests (4–5%) 24, 25 . GRSP accounted for 8–30% of the SOC in the Mu Us sandland, where the SOC is relatively low (~0.2–1%) 44 . Higher GRSP/SOC ratios were consistently found in unfertilized soils 45 , showing that ecosystems with infertile soil are probably more dependent on AMF to obtain N or P than in an ecosystem with fertile soil 1 .…”

Section: Discussionmentioning

confidence: 99%

Recalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests

Zhang

Tang

Zhong

et al. 2017

Sci Rep

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Glomalin-related soil protein (GRSP) is known as an important microbial by-product which is crucial for preserving or accumulating soil organic carbon (SOC). However, the underlying mechanisms are not well understood. In this study, we investigated the chemical structures of GRSP and its relationship with SOC using 13C nuclear magnetic resonance (NMR) in three tropical forests. The three forests, including a planted forest (PF), a secondary forest (MF) and a primary forest (BF), were selected to represent the natural successional process after disturbance in southern China. Results showed that the average concentrations of GRSP were (3.94 ± 1.09) mg cm−3 and accounting for (3.38 ± 1.15)% of the SOC in the top 10 cm soil. NMR analysis indicated rich aromatic C (~30%) and carboxyl C (~40%) in GRSP, and abundant alkyl C (~30%) and O-alkyl C (~50%) in SOC. The recalcitrance indexes (RI), as defined as the ratio of sum of alkyl C and aromatic C over sum of O-alkyl C and carboxyl C, was (98.6 ± 18.9)%, (145.5 ± 10.9)% and (20.7 ± 0.3)% in GRSP higher than that in SOC in the PF, MF and BF, respectively. This study demonstrated that the stubborn structure of GRSP probably regulate the resistance of SOC sequestration in tropical forests, especially in the planted and secondary forests.

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“…GRSP fractions are reported to contribute positively in enriching the soil organic carbon (SOC) pool (Rillig, 2004;He et al, 2010), since glomalin contains ~37% C and accounts for 4-5% of soil total C (Rillig et al, 2001;Lovelock et al, 2004). In C stock, GRSP contained high aromatic (42-49%) and carboxyl (24-30%) C contents and low aliphatic (4-11%) and carbohydrate-type (4-16%) C contents (Schindler et al, 2007).…”

Section: Grsp and Soc Poolmentioning

confidence: 99%

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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Dynamics of arbuscular mycorrhizal fungi and glomalin in the rhizosphere of Artemisia ordosica Krasch. in Mu Us sandland, China

Cited by 66 publications

References 50 publications

Arbuscular mycorrhizal fungal community composition affected by original elevation rather than translocation along an altitudinal gradient on the Qinghai-Tibet Plateau

Arbuscular mycorrhizal fungal community composition affected by original elevation rather than translocation along an altitudinal gradient on the Qinghai-Tibet Plateau

Recalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests

Glomalin: A Potential Soil Conditioner for Perennial Fruits

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