Arbuscular mycorrhizal mycelial networks and glomalin-related soil protein increase soil aggregation in Calcaric Regosol under well-watered and drought stress conditions

Ji, Lingling; Tan, Wenfeng; Chen, Xiuhua

doi:10.1016/j.still.2018.08.010

Cited by 103 publications

(48 citation statements)

References 47 publications

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“…Chen et al showed that the mycorrhizal colonization rate of Amorpha fruticosa by Funneliformis mosseae and F. constrictum was significantly higher under drought stress than in WW conditions [48]. In addition, previous studies on the hybrid poplar [49], Astragalus adsurgens Pall [50], and Malus hupehensis [3] reported that the AMF colonization rate was not affected by water deficit conditions. These phenomena indicate that the mycorrhizal colonization rate depends not only on the external environment factors, but also on the fungi and the colonized plant species [51].…”

Section: Discussionmentioning

confidence: 99%

“…AMF hyphae and spores release GRSP, a type of iron-containing, heat-stable glycoprotein [7,11] while growing with the root system. GRSP is an important binding agent for the formation of soil aggregates [50,101]. It is abundant in soils, usually in the range of several to 10 mg•g −1 soil, which helps combine tiny particles into small aggregates of different sizes [11].…”

Section: Discussionmentioning

confidence: 99%

“…It is abundant in soils, usually in the range of several to 10 mg•g −1 soil, which helps combine tiny particles into small aggregates of different sizes [11]. In addition, to ensure the transportation of water into the mycelium, it can seal the AMF extraradical hyphae in the rhizosphere soil [7], improve soil environment (enter the soil along with the degradation of fungal biomass), which can enhance soil stability, porous structure and moisture penetration, and provide necessary space and improved gas exchange channels for plant root growth [41,50]. Most studies suggest that T-GRSP is a stable glycoprotein accumulated by AMF over a long period of time, while EE-GRSP is a newly produced glycoprotein [102].…”

Section: Discussionmentioning

confidence: 99%

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Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei C.A.Mey. under Drought Stress

Chen

Meng

Feng

et al. 2020

Forests

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Catalpa bungei C.A.Mey. is a common ornamental timber species. Its survival and growth are greatly affected by water scarcity in arid and semi-arid areas of Northwest China. Evidence suggests arbuscular mycorrhizal fungus (AMF) may improve plant drought resistance. However, there is limited information on the systematic effects of AMF on drought resistance in C. bungei seedlings. Here, a pot experiment was used to explore the effects of inoculation with the AMF Rhizophagus intraradices on the growth and physiological performance of C. bungei under different water treatment conditions. Three water levels and two mycorrhizal inoculation treatments were used with factorial design. The results showed that drought stress noticeably affected the growth and physiological performance of C. bungei seedlings. However, inoculation with R. intraradices significantly ameliorated the growth, and alleviated the effects of drought stress. The growth parameters of AMF-inoculated seedlings significantly increased regardless of water status. AMF changed the biomass allocation in seedlings by reducing the root mass ratio (RMR) and root/shoot ratio. AMF-inoculated seedlings displayed higher gas exchange parameters, photosynthetic pigment concentrations, specific leaf area (SLA), but lower specific leaf weight (SLW), regardless of water status. AMF alleviated drought-induced oxidative stress by attenuating the excess generation of reactive oxygen species (ROS), especially H2O2 and O2−, in leaves. Inoculation with AMF under drought stress also dramatically augmented indole-3-acetic acid (IAA) and gibberellins (GA3) levels and the IAA/abscisic acid (ABA) and GA3/ABA ratios, but reduced ABA and zeatin (ZT) levels in leaves. AMF symbiosis improved root morphology and promoted the absorption of nitrogen (N) and phosphorus (P) in seedlings. We conclude that inoculation with R. intraradices is potentially useful for afforestation and cultivation of C. bungei in Northwest China. Furthermore, AMF improved soil structure by increasing the glomalin-related soil protein (GRSP) contents and the proportion of macro-aggregates (0.25–0.5 mm) in the rhizosphere soil.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei C.A.Mey. under Drought Stress

Chen

Meng

Feng

et al. 2020

Forests

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“…When the fungal hyphae form branching structures with glomalin, they physically stick micro-aggregates with macro-aggregates [119]. The physical interaction of external hyphae on soil particles forms stable aggregates [123] in general and under water deficit [124]. Moreover, mycorrhizosphere also influences soil aggregation through alterations in the soil microbial food web, habitats for soil microbes, and biological activities in the host rhizosphere, which could result in an enhancement in microaggregate soil structure [125].…”

Section: Indirect Benefits Of Am Symbiosis For Host Plants Under Watementioning

confidence: 99%

Benefits of Arbuscular Mycorrhizal Fungi Application to Crop Production under Water Scarcity

Posta¹,

Duc²

2020

Drought - Detection and Solutions

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Water deficit is one of the most severe abiotic stresses threatening crop growth and production on the globe. Water stress causes a series of morphological, biochemical, physiological, and molecular alterations that negatively influence plant productivity. However, in nature, plants are often associated with microbes that can modulate plant responses to water scarcity. Among beneficial microbes, arbuscular mycorrhizal fungi (AMF) are one of the most widespread symbiotic fungi colonizing the majority of agricultural plants. Besides an enhancement in plant nutrition, AMF have been reported to improve plant performance under water restrictions. In this chapter, we emphasize the benefits of AMF inoculation to crop production under water deficit based on related laboratory and field experiments. Variable outcomes and challenges of AMF application are also discussed for practical use in crop production under water scarcity.

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“…The hyphae exert an important action in the aggregation of the soil acting in the folding (mechanical action), orientation and reorganization of the particles, making them more stable. Further more, glomalin acts as cementing agent of the mineral and organic particles of the soil (Rillig et al, 2010;Zheng;Ji;Tana;Chen, 2018). In addition, AMF favor the microbiota that inhabits the mycorrhizasphere, which acts on decomposition and mineralization, producing the organic matter that also acts as a cementing agent.…”

Section: Resultsmentioning

confidence: 99%

Do different arbuscular mycorrhizal fungi affect the formation and stability of soil aggregates?

et al. 2019

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Soil structure, which is defined by the arrangement of the particles and the porous space forming aggregates, is one of the most important properties of the soil. Among the biological factors that influence the formation and stabilization of soil aggregates, arbuscular mycorrhizal fungi (AMF) are distinguished due to extrarradicular hyphae and glomalin production. In this context, the objective of this study was to evaluate different AMF (Acaulospora colombiana, Acaulospora longula, Acaulospora morrowiae, Paraglomus occultum and Gigaspora margarita) associated with Urochloa brizantha (A. Rich.) Stapf on soil aggregate stability. The study was conducted in a completely randomized design, using an Oxisol and autoclaved sand 2:1 (v/v), with seven treatments: five AMF; and treatments with plants without inoculation and with only the soil, with 5 replicates. The experiment was conducted during 180 days and the following variables were evaluated: mycelium total length (TML); production of easily extractable glomalin-related soil protein (GRSP) in the soil and aggregate classes; stability of the dry and immersed in water aggregates through the mean geometric diameter (MGD) and the mean weighted diameter (MWD) of aggregates; and the soil aggregate stability index (ASI). It was observed that the inoculation favored soil aggregation, with a high incidence of A. colombiana, which presented the highest MGD, TML and GRSP production in the aggregates with Ø>2.0mm and for A. colombiana and A. morrowiae in the aggregates with Ø<0.105 mm, when compared to the treatment without inoculation. These results show that there is a distinction between the effects of different AMF on the formation and stability of soil aggregates.

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Arbuscular mycorrhizal mycelial networks and glomalin-related soil protein increase soil aggregation in Calcaric Regosol under well-watered and drought stress conditions

Cited by 103 publications

References 47 publications

Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei C.A.Mey. under Drought Stress

Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei C.A.Mey. under Drought Stress

Benefits of Arbuscular Mycorrhizal Fungi Application to Crop Production under Water Scarcity

Do different arbuscular mycorrhizal fungi affect the formation and stability of soil aggregates?

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