Plant nitrogen nutrition: The roles of arbuscular mycorrhizal fungi

Xie, Kun; Ren, Yuhan; Chen, Aiqun; Yang, Congfan; Zheng, Qi; Chen, Jun; Wang, Dongsheng; Li, Yiting; Hu, Shuijin; Xu, Guohua

doi:10.1016/j.jplph.2021.153591

Cited by 48 publications

(49 citation statements)

References 173 publications

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“…After fine grounding, the samples were weighed and then were digested in 1 ml of 6 M nitric acids at 90°C for 2 h. The digested product was diluted with equal volume of sterile water and then was filtered. After a further dilution (1:10), the element concentrations were analyzed with inductively coupled plasma optical emission spectrometry (710-ES, VARIAN, USA) ( Xie et al., 2021 , 2022 ).…”

Section: Methodsmentioning

confidence: 99%

Arbuscular mycorrhiza mitigates zinc stress on Eucalyptus grandis through regulating metal tolerance protein gene expression and ionome uptake

et al. 2022

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Arbuscular mycorrhizal (AM) fungi are symbionts of most terrestrial plants and enhance their adaptability in metal-contaminated soils. In this study, mycorrhized and non-mycorrhized Eucalyptus grandis were grown under different Zn treatments. After 6 weeks of treatment, the growing status and ionome content of plants as well as the expression patterns of metal tolerance proteins and auxin biosynthesis–related genes were measured. In this study, mycorrhized E. grandis showed higher biomass and height at a high level of Zn compared with non-mycorrhized plants. In addition, AM plants accumulated P, Mg, and Mn in roots and P, Fe, and Cu in shoots, which indicate that AM fungi facilitate the uptake of ionome nutrients to promote plant growth. In addition, mycorrhiza upregulated the expression of EgMTP1 and EgMTP7, whose encoding proteins were predicted to be located at the vacuolar membrane. Meanwhile, Golgi membrane transporter EgMTP5 was also induced in AM shoot. Our results suggest that AM likely mitigates Zn toxicity through sequestrating excess Zn into vacuolar and Golgi. Furthermore, the expression of auxin biosynthesis–related genes was facilitated by AM, and this is probably another approach for Zn tolerance.

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Section: Methodsmentioning

confidence: 99%

Arbuscular mycorrhiza mitigates zinc stress on Eucalyptus grandis through regulating metal tolerance protein gene expression and ionome uptake

et al. 2022

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“…Frank in 1885 [ 13 ]. The formation of them is the result of long-term coevolution between the root system of plants and AM fungi, AM association requires the creation of a novel symbiotic interface within the root cells [ 2 ]. Development of AM symbiosis starts with a signal exchange between AM fungi and host plants [ 14 ], which can be divided into distinct stages: (1) At the onset of symbiosis, plants secrete strigolactones (SLs) to stimulate spore germination and hyphal branching near the root [ 15 ].…”

Section: Development Of Am Symbiosismentioning

confidence: 99%

“…Wang et al [ 11 ] proposed that OsNPF4.5 is a low-affinity NO 3 − transporter, and mycorrhizal colonization strongly induced the expression of OsNPF4.5 in rice roots, which is exclusively expressed in the cells containing arbuscules. The orthologues of NPF4.5 in maize ( ZmNPF4.5 ) and sorghum ( SbNPF4.5 ) were also found to be strongly upregulated in AM fungal-colonized roots [ 2 ]. However, the roles of these AM-induced NRTs in symbiotic NO 3 − transfer are still far from well understood due to the lack of precise identification of their subcellular localization and transport activities.…”

Section: Mechanisms Of N Uptake In Plantsmentioning

confidence: 99%

“…In many ecosystems, Pi levels limit plant growth, which has a significant impact on agriculture, especially in areas where low-input agriculture is practiced. In addition, nitrate (NO 3 − ) and ammonium (NH 4 + ) and organic N in the forms of amino acids and peptides are the dominant forms of N that are available to plants, and plant N use efficiency is low, rarely exceeding 50% in most agricultural systems due to leaching and run-off losses and gaseous N emissions [ 2 , 3 ]. Because of the status of Pi and N in soil, there is a great demand for chemical fertilizers to improve nutrient deficiency [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

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The Roles of Phosphorus and Nitrogen Nutrient Transporters in the Arbuscular Mycorrhizal Symbiosis

Rui

Mao

2022

IJMS

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More than 80% of land plant species can form symbioses with arbuscular mycorrhizal (AM) fungi, and nutrient transfer to plants is largely mediated through this partnership. Over the last few years, great progress has been made in deciphering the molecular mechanisms underlying the AM-mediated modulation of nutrient uptake progress, and a growing number of fungal and plant genes responsible for the uptake of nutrients from soil or transfer across the fungal–root interface have been identified. In this review, we outline the current concepts of nutrient exchanges within this symbiosis (mechanisms and regulation) and focus on P and N transfer from the fungal partner to the host plant, with a highlight on a possible interplay between P and N nutrient exchanges. Transporters belonging to the plant or AM fungi can synergistically process the transmembrane transport of soil nutrients to the symbiotic interface for further plant acquisition. Although much progress has been made to elucidate the complex mechanism for the integrated roles of nutrient transfers in AM symbiosis, questions still remain to be answered; for example, P and N transporters are less studied in different species of AM fungi; the involvement of AM fungi in plant N uptake is not as clearly defined as that of P; coordinated utilization of N and P is unknown; transporters of cultivated plants inoculated with AM fungi and transcriptomic and metabolomic networks at both the soil–fungi interface and fungi–plant interface have been insufficiently studied. These findings open new perspectives for fundamental research and application of AM fungi in agriculture.

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“…This symbiotic interaction is highly beneficial and is based in the bidirectional nutrient transfer between host plants and fungi. AM fungi provide plants with essential mineral nutrients such as phosphorus (P) and nitrogen (N) and, in return, fungi obtain their carbon from the host plant in the form of plant photosynthates and fatty acids [ 1 , 2 , 3 ]. In addition to their role in plant growth, AM fungi also enhance the ability of plants to adapt to biotic and abiotic environmental stress conditions (for review, see Pozo and Azcón-Aguilar [ 4 ] and Lenoir, et al [ 5 ]).…”

Section: Introductionmentioning

confidence: 99%

Molecular Regulation of Arbuscular Mycorrhizal Symbiosis

Ho-Plágaro

Garrido

2022

IJMS

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Plant-microorganism interactions at the rhizosphere level have a major impact on plant growth and plant tolerance and/or resistance to biotic and abiotic stresses. Of particular importance for forestry and agricultural systems is the cooperative and mutualistic interaction between plant roots and arbuscular mycorrhizal (AM) fungi from the phylum Glomeromycotina, since about 80% of terrestrial plant species can form AM symbiosis. The interaction is tightly regulated by both partners at the cellular, molecular and genetic levels, and it is highly dependent on environmental and biological variables. Recent studies have shown how fungal signals and their corresponding host plant receptor-mediated signalling regulate AM symbiosis. Host-generated symbiotic responses have been characterized and the molecular mechanisms enabling the regulation of fungal colonization and symbiosis functionality have been investigated. This review summarizes these and other recent relevant findings focusing on the molecular players and the signalling that regulate AM symbiosis. Future progress and knowledge about the underlying mechanisms for AM symbiosis regulation will be useful to facilitate agro-biotechnological procedures to improve AM colonization and/or efficiency.

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Plant nitrogen nutrition: The roles of arbuscular mycorrhizal fungi

Cited by 48 publications

References 173 publications

Arbuscular mycorrhiza mitigates zinc stress on Eucalyptus grandis through regulating metal tolerance protein gene expression and ionome uptake

Arbuscular mycorrhiza mitigates zinc stress on Eucalyptus grandis through regulating metal tolerance protein gene expression and ionome uptake

The Roles of Phosphorus and Nitrogen Nutrient Transporters in the Arbuscular Mycorrhizal Symbiosis

Molecular Regulation of Arbuscular Mycorrhizal Symbiosis

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