Nitrogen transfer and assimilation between the arbuscular mycorrhizal fungus <i>Glomus intraradices</i> Schenck &amp; Smith and Ri T-DNA roots of <i>Daucus carota</i> L. in an in vitro compartmented system

Toussaint, Jean-Patrick; St‐Arnaud, Marc; Charest, Christiane

doi:10.1139/w04-009

Cited by 115 publications

(67 citation statements)

References 48 publications

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“…However, there are numerous reports in which a significant transport of N by AM fungi to their host has been demonstrated. In AM root organ cultures, 21% of the total N in the roots were taken up by the ERM [102]; and in similar experiments even higher proportions were observed [103]. In maize, 75% of the N in the leaves were taken up by the ERM of an AM fungus [104].…”

Section: Uptake Of Nitrogen From the Soilmentioning

confidence: 66%

“…NH4 + has often been described as the preferred N source of mycorrhizal fungi, because its uptake is energetically more efficient than the uptake of NO3 - [13,102,105]. However, ECM fungi differ in their ability to absorb NO3 -from the soil, and some ECM fungi have been shown to produce a greater biomass when supplied with NO3 -compared to NH4 + [107].…”

Section: Uptake Of Nitrogen From the Soilmentioning

confidence: 99%

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The Role of the Mycorrhizal Symbiosis in Nutrient Uptake of Plants and the Regulatory Mechanisms Underlying These Transport Processes

Bücking¹,

Liepold²,

Ambilwade³

2012

Plant Science

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Section: Uptake Of Nitrogen From the Soilmentioning

confidence: 66%

Section: Uptake Of Nitrogen From the Soilmentioning

confidence: 99%

The Role of the Mycorrhizal Symbiosis in Nutrient Uptake of Plants and the Regulatory Mechanisms Underlying These Transport Processes

Bücking¹,

Liepold²,

Ambilwade³

2012

Plant Science

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“…Tyrosine and phenylalanine are important precursors of some secondary metabolites, such as rosmarinic and caffeic acids (Petersen and Simmonds 2003). Consequently, AM symbiosis can enhance the synthesis of certain amino acids and contribute to the accumulation of specific metabolites by promoting N uptake (Smith and Read 1997;Toussaint et al 2004). Some research has also shown that symbiosis with AM fungi results in the increase of terpenoids and phenolic acids, which may result from increased absorption of mineral nutrients, especially P and N (Kapoor et al 2002a, b;Toussaint et al 2007).…”

Section: Discussion and Perspectivesmentioning

confidence: 99%

Arbuscular mycorrhizal symbiosis and active ingredients of medicinal plants: current research status and prospectives

et al. 2013

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Medicinal plants have been used world-wide for thousands of years and are widely recognized as having high healing but minor toxic side effects. The scarcity and increasing demand for medicinal plants and their products have promoted the development of artificial cultivation of medicinal plants. Currently, one of the prominent issues in medicinal cultivation systems is the unstable quality of the products. Arbuscular mycorrhiza (AM) affects secondary metabolism and the production of active ingredients of medicinal plants and thus influence the quality of herbal medicines. In this review, we have assembled, analyzed, and summarized the effects of AM symbioses on secondary metabolites of medicinal plants. We conclude that symbiosis of AM is conducive to favorable characteristics of medicinal plants, by improving the production and accumulation of important active ingredients of medicinal plants such as terpenes, phenols, and alkaloids, optimizing the composition of different active ingredients in medicinal plants and ultimately improving the quality of herbal materials. We are convinced that the AM symbiosis will benefit the cultivation of medicinal plants and improve the total yield and quality of herbal materials. Through this review, we hope to draw attention to the status and prospects of, and arouse more interest in, the research field of medicinal plants and mycorrhiza.

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“…Assimilation of NH + 4 is a principal means of N absorption in AM fungal systems (Hawkins et al, 2000;Toussaint et al, 2004). N uptake and incorporation into amino acids via the glutamine synthetase/glutamate synthase (GS/GOGAT) cycle has been found in AM fungi (Smith et al, 1985).…”

Section: Nitrogen Transfer At the Mycorrhizal Interfacementioning

confidence: 99%

Arbuscular mycorrhizal networks: process and functions. A review

Garg

Chandel

2010

Agron. Sustain. Dev.

155

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-An unprecedented, rapid change in environmental conditions is being observed, which invariably overrules the adaptive capacity of land plants. These environmental changes mainly originate from anthropogenic activities, which have aggravated air and soil pollution, acid precipitation, soil degradation, salinity, contamination of natural and agro-ecosystems with heavy metals such as cadmium (Cd), lead (Pb), mercury (Hg), arsenic (As), global climate change, etc. The restoration of degraded natural habitats using sustainable, low-input cropping systems with the aim of maximizing yields of crop plants is the need of the hour. Thus, incorporation of the natural roles of beneficial microorganisms in maintaining soil fertility and plant productivity is gaining importance and may be an important approach. Symbiotic association of the majority of crop plants with arbuscular mycorrhizal (AM) fungi plays a central role in many microbiological and ecological processes. In mycorrhizal associations, the fungal partner assists its plant host in phosphorus (P) and nitrogen (N) uptake and also some of the relatively immobile trace elements such as zinc (Zn), copper (Cu) and iron (Fe). AM fungi also benefit plants by increasing water uptake, plant resistance and biocontrol of phytopathogens, adaptation to a variety of environmental stresses such as drought, heat, salinity, heavy metal contamination, production of growth hormones and certain enzymes, and even in the uptake of radioactive elements. The establishment of symbiotic association usually involves mutual recognition and a high degree of coordination at the morphological and physiological level, which requires a continuous cellular and molecular dialogue between both the partners. This has led to the identification of the genes, signal transduction pathways and the chemical structures of components relevant to symbiosis; however, scientific knowledge on the physiology and function of these fungi is still limited. This review unfolds our current knowledge on signals and mechanisms in the development of AM symbiosis; the molecular basis of nutrient exchange between AM fungi and host plants; and the role of AM fungi in water uptake, disease protection, alleviation of various abiotic soil stresses and increasing grain production.

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Nitrogen transfer and assimilation between the arbuscular mycorrhizal fungus Glomus intraradices Schenck & Smith and Ri T-DNA roots of Daucus carota L. in an in vitro compartmented system

Cited by 115 publications

References 48 publications

The Role of the Mycorrhizal Symbiosis in Nutrient Uptake of Plants and the Regulatory Mechanisms Underlying These Transport Processes

The Role of the Mycorrhizal Symbiosis in Nutrient Uptake of Plants and the Regulatory Mechanisms Underlying These Transport Processes

Arbuscular mycorrhizal symbiosis and active ingredients of medicinal plants: current research status and prospectives

Arbuscular mycorrhizal networks: process and functions. A review

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