Arbuscular mycorrhizal fungi conducting the hyphosphere bacterial orchestra

Zhang, Lin; Zhou, Jiachao; George, Timothy S.; Limpens, Erik; Feng, Gu

doi:10.1016/j.tplants.2021.10.008

Cited by 130 publications

(121 citation statements)

References 85 publications

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“… 127 The data indicate that AMF hyphae play a main role in increasing soil P similar to the roots, 128 and it is critical to recruit phytate-solubilizing microbes to allow access to phytase in soils. 129 …”

Section: Strategies To Improve Phytate-p Acquisition By Plantsmentioning

confidence: 99%

Enhancing Phytate Availability in Soils and Phytate-P Acquisition by Plants: A Review

Han

Cao

et al. 2022

Environ. Sci. Technol.

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Phytate ( myo -inositol hexakisphosphate salts) can constitute a large fraction of the organic P in soils. As a more recalcitrant form of soil organic P, up to 51 million metric tons of phytate accumulate in soils annually, corresponding to ∼65% of the P fertilizer application. However, the availability of phytate is limited due to its strong binding to soils via its highly-phosphorylated inositol structure, with sorption capacity being ∼4 times that of orthophosphate in soils. Phosphorus (P) is one of the most limiting macronutrients for agricultural productivity. Given that phosphate rock is a finite resource, coupled with the increasing difficulty in its extraction and geopolitical fragility in supply, it is anticipated that both economic and environmental costs of P fertilizer will greatly increase. Therefore, optimizing the use of soil phytate-P can potentially enhance the economic and environmental sustainability of agriculture production. To increase phytate-P availability in the rhizosphere, plants and microbes have developed strategies to improve phytate solubility and mineralization by secreting mobilizing agents including organic acids and hydrolyzing enzymes including various phytases. Though we have some understanding of phytate availability and phytase activity in soils, the limiting steps for phytate-P acquisition by plants proposed two decades ago remain elusive. Besides, the relative contribution of plant- and microbe-derived phytases, including those from mycorrhizas, in improving phytate-P utilization is poorly understood. Hence, it is important to understand the processes that influence phytate-P acquisition by plants, thereby developing effective molecular biotechnologies to enhance the dynamics of phytate in soil. However, from a practical view, phytate-P acquisition by plants competes with soil P fixation, so the ability of plants to access stable phytate must be evaluated from both a plant and soil perspective. Here, we summarize information on phytate availability in soils and phytate-P acquisition by plants. In addition, agronomic approaches and biotechnological strategies to improve soil phytate-P utilization by plants are discussed, and questions that need further investigation are raised. The information helps to better improve phytate-P utilization by plants, thereby reducing P resource inputs and pollution risks to the wider environment.

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Section: Strategies To Improve Phytate-p Acquisition By Plantsmentioning

confidence: 99%

Enhancing Phytate Availability in Soils and Phytate-P Acquisition by Plants: A Review

Han

Cao

et al. 2022

Environ. Sci. Technol.

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“…Different groups of soil bacteria have been reported to interact with AMF, including plant-growth-promoting bacteria (PGPR), endo-bacteria, mycorrhiza helper bacteria (MHB), and deleterious bacteria (DB), etc. [37][38][39] (Figure 1). Knowledge of such interactions is vital for enhancing the tripartite symbiosis between AMF, bacteria, and host plants.…”

Section: Major Groups Of Bacteria Interacting With Amfmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungi and Microbes Interaction in Rice Mycorrhizosphere

et al. 2022

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Rice (Oryza sativa L.) is the most widely consumed staple crop for approximately half of the world’s population. Many interactions take place in paddy soil, particularly in the rice mycorrhizosphere region. Arbuscular mycorrhizal fungi (AMF) and soil microbe interactions are among the most important and influential processes that occur, as they significantly influence the plant growth and soil structure properties. Their interactions may be of crucial importance to the sustainable, low-input productivity of paddy ecosystems. In this study, we summarize the major groups of microbial communities interacting with arbuscular mycorrhizal fungi in the rice mycorrhizosphere, and discuss the mechanisms involved in these arbuscular mycorrhizal fungi and microbe interactions. We further highlight the potential application of arbuscular mycorrhizal mutualism in paddy fields, which will be helpful for the production of bioinoculants in the future.

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“…Distinct microbial consortia associate with different mycorrhizal lineages 18,19,31,89 . Although empirical evidence remains sparse, different mycorrhizal exudate profiles, growth habits, and other functional traits may shape the composition and activity of the surrounding microbial community 48,89,95,96 , a phenomenon that has been documented more extensively for root-microbe interactions [97][98][99] . Lower bacterial growth potential and growth efficiency in S. bescii-compared to R. irregularis-inoculated soils may be due to S. bescii's wider enzymatic repertoire, which could accelerate decomposition (as indicated by higher CO 2 efflux) or heighten competitive interactions with other soil biota.…”

Section: Magnitude Of Bacterial Response Is Fungal Lineage-dependentmentioning

confidence: 99%

Plant-associated fungi support bacterial resilience following water limitation

Hestrin

Kan

Lafler

et al. 2022

Preprint

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Drought disrupts soil microbial activity and many biogeochemical processes. Although mycorrhizal fungi are known to impact plant functions and nutrient cycling during drought, their effects on drought-exposed soil microbial communities are not well resolved. We used H218O quantitative stable isotope probing (qSIP) to investigate microbial response to water limitation in the hyphospheres of two distinct mycorrhizal lineages (Rhizophagus irregularis and Serendipita bescii) grown with the bioenergy model grass Panicum hallii. In the absence of mycorrhizal inocula, water limitation resulted in significantly lower bacterial growth rates and lower diversity in the actively growing bacterial community. Water limitation also decoupled growth from CO2 efflux, resulting in a threefold lower growth efficiency. In contrast, both mycorrhizal lineages appeared to protect bacterial communities exposed to water limitation: bacterial growth rates, growth efficiency, and the diversity of the active bacterial community were similar in water-replete and water-limited soils inoculated with either fungus. Several of the bacterial taxa that responded positively to mycorrhizal inocula in water-limited soil belong to lineages that are considered drought-susceptible. Together, these results indicate that mycorrhizal-bacterial interactions can stabilize bacterial communities in water-limited environments. As drought frequency and severity increase, these synergistic relationships may support ecosystem resilience to moisture stress.

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Arbuscular mycorrhizal fungi conducting the hyphosphere bacterial orchestra

Cited by 130 publications

References 85 publications

Enhancing Phytate Availability in Soils and Phytate-P Acquisition by Plants: A Review

Enhancing Phytate Availability in Soils and Phytate-P Acquisition by Plants: A Review

Arbuscular Mycorrhizal Fungi and Microbes Interaction in Rice Mycorrhizosphere

Plant-associated fungi support bacterial resilience following water limitation

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