Extraradical Mycorrhizal Hyphae Promote Soil Carbon Sequestration through Difficultly Extractable Glomalin-Related Soil Protein in Response to Soil Water Stress

Wang, Yujuan; He, Xinhua; Meng, Lulu; Zou, Ying-Ning; Wu, Qiang‐Sheng

doi:10.1007/s00248-022-02153-y

Cited by 17 publications

(10 citation statements)

References 60 publications

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“…In addition, inoculation with D. spurca significantly increased stem diameter, leaf biomass, and stem biomass in walnuts, with the increased tendency being more pronounced under soil drought than under non-stress conditions. This is in agreement with the findings of Wang et al [24] on drought-stressed trifoliate oranges inoculated with Rhizophagus intraradices and Mo et al [25] on drought-stressed watermelons inoculated with Glomus versiforme. This demonstrates the role of AMFs in maintaining plant growth vigor in arid zones.…”

Section: Discussionsupporting

confidence: 93%

Growth Performance and Osmolyte Regulation of Drought-Stressed Walnut Plants Are Improved by Mycorrhiza

Wen,

Zhou,

et al. 2024

Agriculture

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This study aims to evaluate whether a selected arbuscular mycorrhizal fungus, Diversispora spurca, improves growth in drought-stressed walnut (Juglans regia L. cv. Qingxiang) plants and whether this improvement is associated with changes in osmolyte (fructose, glucose, sucrose, soluble protein, proline, and betaine) levels. After 60 days of soil drought treatment (50% of maximum field water-holding capacity), root D. spurca colonization rate and soil mycelium length decreased by 13.57% and 64.03%, respectively. Soil drought also inhibited the growth performance of aboveground (stem diameter, leaf number, leaf biomass, and stem biomass) and underground (root projected area, surface area, and average diameter) parts, with uninoculated plants showing a stronger inhibition than D. spurca-inoculated plants. D. spurca significantly increased these growth variables, along with aboveground part variables and root areas being more prominent under drought stress versus non-stress conditions. Although drought treatment suppressed the chlorophyll index and nitrogen balance index in leaves, mycorrhizal inoculation significantly increased these indices. Walnut plants were able to actively increase leaf fructose, glucose, sucrose, betaine, and proline levels under such drought stress. Inoculation of D. spurca also significantly increased leaf fructose, glucose, sucrose, betaine, proline, and soluble protein levels under drought stress and non-stress, with the increasing trend in betaine and soluble protein being higher under drought stress versus non-stress. Drought stress dramatically raised leaf hydrogen peroxide (H2O2) levels in both inoculated and uninoculated plants, while mycorrhizal plants presented significantly lower H2O2 levels, with the decreasing trend higher under drought stress versus non-stress. In conclusion, D. spurca symbiosis can increase the growth of drought-stressed walnut plants, associated with increased osmolyte levels and decreased H2O2 levels.

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Section: Discussionsupporting

confidence: 93%

Growth Performance and Osmolyte Regulation of Drought-Stressed Walnut Plants Are Improved by Mycorrhiza

Wen,

Zhou,

et al. 2024

Agriculture

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“…It is known that the extraradical hyphae and spores of AMF secrete a special glycoprotein, glomalin into the soil, defined as glomalin-related soil protein (GRSP) ( Rillig, 2004 ). GRSP is released to cover the surface of soil organic matter and aggregates, and can store C in protein and carbohydrate subunits, forming a protective layer that avoids the loss of nutrients (e.g., C) in soil aggregates ( Schindler et al., 2007 ; Wang et al., 2023 ).…”

Section: Carbon Transfer Between Plants Through Common Arbuscular Myc...mentioning

confidence: 99%

Interplant carbon and nitrogen transfers mediated by common arbuscular mycorrhizal networks: beneficial pathways for system functionality

Luo

Liu

et al. 2023

Front. Plant Sci.

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Arbuscular mycorrhizal fungi (AMF) are ubiquitous in soil and form nutritional symbioses with ~80% of vascular plant species, which significantly impact global carbon (C) and nitrogen (N) biogeochemical cycles. Roots of plant individuals are interconnected by AMF hyphae to form common AM networks (CAMNs), which provide pathways for the transfer of C and N from one plant to another, promoting plant coexistence and biodiversity. Despite that stable isotope methodologies (13C, 14C and 15N tracer techniques) have demonstrated CAMNs are an important pathway for the translocation of both C and N, the functioning of CAMNs in ecosystem C and N dynamics remains equivocal. This review systematically synthesizes both laboratory and field evidence in interplant C and N transfer through CAMNs generated through stable isotope methodologies and highlights perspectives on the system functionality of CAMNs with implications for plant coexistence, species diversity and community stability. One-way transfers from donor to recipient plants of 0.02-41% C and 0.04-80% N of recipient C and N have been observed, with the reverse fluxes generally less than 15% of donor C and N. Interplant C and N transfers have practical implications for plant performance, coexistence and biodiversity in both resource-limited and resource-unlimited habitats. Resource competition among coexisting individuals of the same or different species is undoubtedly modified by such C and N transfers. Studying interplant variability in these transfers with 13C and 15N tracer application and natural abundance measurements could address the eco physiological significance of such CAMNs in sustainable agricultural and natural ecosystems.

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Section: Introductionmentioning

confidence: 99%

“…Glomalin-related soil protein (GRSP) is a glycoprotein secreted into the soil by AM fungi and is thought to be a component of AM fungi that helps host plant function [11]. GRSP has received much attention due to its abundance of functional groups, recalcitrance, and long turnover time, which stimulates soil microbial activity, improves soil structure and fertility, sequesters soil heavy metals, improves soil moisture, and so on [11][12][13]. GRSP is divided into two components: easily extractable glomalin-related soil protein (EG), an active but unstable GRSP component; and difficultly extractable glomalin-associated soil protein (DG), an inactive but stable GRSP component [11].…”

Section: Introductionmentioning

confidence: 99%

“…GRSP has received much attention due to its abundance of functional groups, recalcitrance, and long turnover time, which stimulates soil microbial activity, improves soil structure and fertility, sequesters soil heavy metals, improves soil moisture, and so on [11][12][13]. GRSP is divided into two components: easily extractable glomalin-related soil protein (EG), an active but unstable GRSP component; and difficultly extractable glomalin-associated soil protein (DG), an inactive but stable GRSP component [11]. It has been shown that the application of exogenous EG significantly enhanced plant growth behavior and improved fruit quality and soil properties in various citrus plants [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Changes in Fatty Acid Profiles in Seeds of Camellia oleifera Treated by Mycorrhizal Fungi and Glomalin

Wu,

Zou,

Xiao

et al. 2024

Horticulturae

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Camellia oleifera is an important oilseed forest tree, but it is unknown whether and how inoculation with arbuscular mycorrhizal fungi, as well as spraying easily extractable glomalin-related soil protein (EG), regulates the fatty acid profile in seeds of this species. This study explored how inoculation with Rhizophagus intraradices (800 g inoculum/tree) and spraying EG (2.5 L/tree, four times in total, once a week) modulated the fatty acid profile for potential nutritional qualities in the seeds of 20-year-old C. oleifera. Spraying exogenous EG significantly increased fruit transverse diameter, longitudinal diameter, fruit weight, number of seeds, and seed weight but had no significant effect on the root mycorrhizal colonization rate. Inoculation with R. intraradices had no significant effect on these fruit traits but significantly boosted the root mycorrhizal colonization rate. A total of 11 saturated fatty acids and 12 unsaturated fatty acids were detected from the seeds, with the unsaturated fatty acids consisting primarily of C18:1N-12, C18:1N-9C, and C18:2-N6. Spraying exogenous EG significantly increased the levels of major unsaturated fatty acid components such as C18:1N-12, C18:1N-9C, C18:1N-7, and C18:2N-6 by 140.6%, 59.7%, 97.6%, and 60.6%, respectively, while decreasing the level of C16:0. Inoculation with R. intraradices only decreased the levels of C16:0 and C18:0, while increased the level of C18:2N-6. Both treatments increased the percentage of unsaturated fatty acids in total fatty acids, resulting in an increase in the unsaturation index of fatty acids. In addition, inoculation with R. intraradices significantly up-regulated the expression of CoFAD2, spraying exogenous EG significantly increased the expression of CoSAD, CoFAD2, and CoFAD3, and both treatments also significantly suppressed the expression of CoFAE. These findings suggested that exogenous EG as a biostimulant, is more suitable to regulate the nutritional values of fatty acids in seeds of 20-year-old C. oleifera.

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Extraradical Mycorrhizal Hyphae Promote Soil Carbon Sequestration through Difficultly Extractable Glomalin-Related Soil Protein in Response to Soil Water Stress

Cited by 17 publications

References 60 publications

Growth Performance and Osmolyte Regulation of Drought-Stressed Walnut Plants Are Improved by Mycorrhiza

Growth Performance and Osmolyte Regulation of Drought-Stressed Walnut Plants Are Improved by Mycorrhiza

Interplant carbon and nitrogen transfers mediated by common arbuscular mycorrhizal networks: beneficial pathways for system functionality

Changes in Fatty Acid Profiles in Seeds of Camellia oleifera Treated by Mycorrhizal Fungi and Glomalin

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