Changes in soil aggregation and glomalin-related soil protein content as affected by the arbuscular mycorrhizal fungal species Glomus mosseae and Glomus intraradices

By S. Bedini, Elisa Pellegrino, L. Avio, S. Pellegrini, P. Bazzoffi, Emanuele Argese, M. Giovannetti. 2009

354 citations recorded by the source corpus.

Abstract Arbuscular mycorrhizal (AM) fungi are key organisms of the soil/plant system, influencing soil fertility and plant nutrition, and contributing to soil aggregation and soil structure stability by the combined action of extraradical hyphae and of an insoluble, hydrophobic proteinaceous substance named glomalin-related soil protein (GRSP). Since the GRSP extraction procedures have recently revealed problems related to co-extracting substances, the relationship between GRSP and AM fungi still remains to be verified. In this work the hypothesis that GRSP concentration is positively correlated with the occurrence of AM fungi was tested by using Medicago sativa plants inoculated with different isolates of Glomus mosseae and Glomus intraradices in a microcosm experiment. Our results show that (i) mycorrhizal establishment produced an increase in GRSP concentration – compared to initial values – in contrast with non-mycorrhizal plants, which did not produce any change; (ii) aggregate stability, evaluated as mean weight diameter (MWD) of macroaggregates of 1–2 mm diameter, was significantly higher in mycorrhizal soils compared to non-mycorrhizal soil; (iii) GRSP concentration and soil aggregate stability were positively correlated with mycorrhizal root volume and weakly correlated with total root volume; (iv) MWD values of soil aggregates were positively correlated with values of total hyphal length and hyphal density of the AM fungi utilized. The different ability of AM fungal isolates to affect GRSP concentration and to form extensive and dense mycelial networks, which may directly affect soil aggregates stability by hyphal enmeshment of soil particles, suggests the possibility of selecting the most efficient isolates to be utilized for soil quality improvement and land restoration programs.

Subfields: Insect Science, Plant Science, Soil Science

View Paper: https://www.semanticscholar.org/paper/378a1d25ee54153182ed6fecf4167de90d06e3c6

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Insect Science

1. Fayuan Wang
2. M. Ryan
3. M. Giovannetti
4. M. Martínez-Salgado
5. A. Roldán
6. Santa María
7. Enrico Bonari
8. L. Avio

In Plant Science

1. Elisa Pellegrino
2. Fayuan Wang
3. S. Bedini
4. S. Gianinazzi
5. J. Kirkegaard
6. M. Ryan
7. M. Alguacil
8. A. Roldán

In Soil Science

1. Fayuan Wang
2. Elisa Pellegrino
3. S. Bedini
4. J. Kirkegaard
5. M. Ryan
6. M. Giovannetti
7. A. Roldán
8. L. Avio

Citations in the corpus

• Occurrence of arbuscular mycorrhizal fungi in mining-impacted sites and their contribution to ecological restoration: Mechanisms and applications (2017, methodology): “GRSP has a potential role in salt (NaC) and heavy metal immobilization (Gonz alez-Ch avez et al., 2004; Hammer and Rillig, 2011; Vodnik et al., 2008).”
• Impact of nitrogen fertilization and soil tillage on arbuscular mycorrhizal fungal communities in a Mediterranean agroecosystem (2013, neutral): “…quantities of a sticky proteinaceous hydrophobic substance, glomalin, that accumulates in soil as glomalin-50 related soil protein (GRSP) (Rillig and Mummey, 2006; Bedini et al., 2009), and of other recalcitrant polymers, such as chitin and chitosan (Zhu and Miller, 2003; Fortuna et al., 2012).”
• Bacteria and fungi can contribute to nutrients bioavailability and aggregate formation in degraded soils. (2016, neutral): “Fungi and soil aggregation The omnipresent AM fungi use its extra-radical hyphae (mycelium) to stabilize soil aggregates (Rillig et al., 2006; Bedini et al., 2009; Peng et al., 2013) as well as it can modify the morphological structures and biochemical nature of host plants (Borie et al.”
• Biological soil quality indicators: a review (2010, background): “Bedini et al. (2009), using Medicago sativa plants, inoculated with different isolates of Glomus mosseae and Glomus intraradices in a microcosm experiment, found significantly higher aggregate stability (as mean weight diameter (MWD) of macro aggregates of 1–2 mm diameter), in mycorrhizal soils…”
• Agroecology: the key role of arbuscular mycorrhizas in ecosystem services (2010, background): “…development and increase in plant quality for human health considered to be an important element in helping to stabilise soil aggregates (Andrade et al. 1998; Rillig and Mummey 2006), thereby leading to increased soil structural stability and quality (Bedini et al. 2009; Caravaca et al. 2006).”
• Arbuscular mycorrhizal symbiosis: plant growth improvement and induction of resistance under stressful conditions (2021, background): “AMF also ameliorate soil stability, water retention, and soil aggregate, through the production of proteinic substances with adhesive properties (Bedini et al. 2009).”
• Plant type differently promote the arbuscular mycorrhizal fungi biodiversity in the rhizosphere after revegetation of a degraded, semiarid land (2010, background): “It has been showed that extraradical hyphae contribute to the formation and maintenance of soil aggregates (Bedini et al., 2009; Rillig et al., 2010) through the exudation of glomalin, a glycoprotein that acts as a glue-like agent for soil particles (Wright and Anderson, 2000).”
• Field inoculation effectiveness of native and exotic arbuscular mycorrhizal fungi in a Mediterranean agricultural soil (2011, result): “mosseae isolates, consistently with previous data on Medicago sativa (Vazquez et al., 2001; Avio et al., 2006; Bedini et al., 2009).”
• The agronomic relevance of arbuscular mycorrhizas in the fertility of Australian extensive cropping systems (2012, background): “Such benefits may differ between species and isolates of AMF and thus be affected by crop rotations (Bedini et al., 2009).”