Arbuscular mycorrhiza enhanced arsenic resistance of both white clover (Trifolium repens Linn.) and ryegrass (Lolium perenne L.) plants in an arsenic-contaminated soil

Dong, Yan; Zhu, Yan; Smith, F. A.; Wang, Youshan; Chen, Baodong

doi:10.1016/j.envpol.2007.10.023

Cited by 127 publications

(55 citation statements)

References 26 publications

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“…However, mycorrhizae altered this relation since AM fungi inoculation reduced to one third the As accumulated in roots, as well as the As accumulated in leaves (although less markedly). Other authors have recorded lower As concentrations on mycorrhized plants such as maize [29], tomato [31], lentil [35], clover [36], sunflower [37], rye grass and white clover [38], and plants growing on As-contaminated areas [26]. They have stated different hypotheses: (i) mycorrhizal inoculation improves the plant yield and causes a dilution effect in the As concentration; (ii) AM fungi hyphae exhibit a great variety of free groups such as hydroxyl, carboxyl, and amino acids, which could bind to As, retaining it in the fungal tissues and reducing the As intake by roots.…”

Section: Resultsmentioning

confidence: 99%

The Arbuscular Mycorrhiza Rhizophagus intraradices Reduces the Negative Effects of Arsenic on Soybean Plants

Spagnoletti

Lavado

2015

Agronomy

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Arsenic (As) in soils causes several detrimental effects, including death. Arsenic toxicity in soybean plants (Glycine max L.) has been little studied. Arbuscular mycorrhiza (AM) increase the tolerance of host plants to abiotic stress, like As. We investigated the effects of AM fungi on soybean grown in As-contaminated soils. A pot experiment was carried out in a glasshouse, at random with five replications. We applied three levels of As (0, 25, and 50 mg As kg −1 ), inoculated and non-inoculated with the AM fungus Rhizophagus intraradices (N.C. Schenck & G.S. Sm.) C. Walker & A. Schüßler. Plant parameters and mycorrhizal colonization were measured. Arsenic in the substrate, roots, and leaves was quantified. Arsenic negatively affected the AM percentage of spore germination and hyphal length. As also affected soybean plants negatively: an extreme treatment caused a reduction of more than 77.47% in aerial biomass, 68.19% in plant height, 78.35% in number of leaves, and 44.96% reduction in root length, and delayed the phenological evolution. Mycorrhizal inoculation improved all of these parameters, and decreased plant As accumulation (from 7.8 mg As kg ). AM inoculation showed potential to reduce As toxicity in contaminated areas. The AM fungi decreased As concentration in plants following different ways: dilution effect, less As intake by roots, and improving soybean tolerance to As.

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Section: Resultsmentioning

confidence: 99%

The Arbuscular Mycorrhiza Rhizophagus intraradices Reduces the Negative Effects of Arsenic on Soybean Plants

Spagnoletti

Lavado

2015

Agronomy

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“…The significant interaction of species and AM fungi on the concentrations of N, P, and K + indicated that symbiosis between the two symbionts resulted in differential nutrient uptake efficiencies for different AM fungi and host plant combinations. Enhanced growth of mycorrhizal plants in metal(loid) environments has been related to mycorrhizae-mediated enhancement of mineral nutrition as they can translocate inorganic phosphate by increasing the interface between plants and the soil environment through extensive extraradical hyphal networks (Ezawa et al, 2002;Pichardo et al, 2012;Chan et al, 2013;Zaefarian et al, 2013), dilution effect due to significant increase in root dry weight (Dong et al, 2008;Bona et al, 2011;Chen et al, 2013;de Melo Rangel et al, 2014), and superior branching pattern of roots (Vogel-Mikuš and Regvar, 2006;Smith and Read, 2008). Constitutive expression or induction of nutrient transporters during symbiosis could improve translocation of mineral elements to the plant (Harrison et al, 2002;Giasson et al, 2008;Wang et al, 2008;Christophersen et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Metal uptake, oxidative metabolism, and mycorrhization in pigeonpeaand pea under arsenic and cadmium stress

Garg¹,

Singla²,

Bhandari³

2015

Turk J Agric For

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Bolan et al., 2014). The Comprehensive Environmental Response, Compensation, and Liability Act permanently listed As as no. 1 and Cd as no. 7 out of 275 in its priority list of hazardous materials (ATSDR, 2007).Arsenic and Cd toxicity cause oxidative stress by changing the composition and fluidity of membrane lipids, displacing essential metals in plant pigments or enzymes and thereby inactivating photosynthesis and respiration, and obstructing uptake and transport of water and nutrients, further reducing protein synthesis and carbohydrate metabolism along with diminished growth and yield (

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“…7−9 Additionally, AMF can stabilize soil structure, 10 relieve drought stress on plants, 11 protect host plants from pathogens, 12 and even take an active part in maintaining plant biodiversity and ecosystem stability. 13 Many studies have also demonstrated that AM symbiosis plays an important role in plant resistance to contamination by heavy metals 14,15 such as As, 16 Cd, 17 Cu, 18 Zn, 19 Pb, 20 Cr, 21 etc. Our recent work has shown that AM symbiosis can greatly enhance plant Cr tolerance, especially at high levels of Cr(VI) contamination.…”

Section: ■ Introductionmentioning

confidence: 99%

Transformation and Immobilization of Chromium by Arbuscular Mycorrhizal Fungi as Revealed by SEM–EDS, TEM–EDS, and XAFS

Xin²,

Sun

et al. 2015

Environ. Sci. Technol.

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Arbuscular mycorrhizal fungi (AMF), ubiquitous soil fungi that form symbiotic relationships with the majority of terrestrial plants, are known to play an important role in plant tolerance to chromium (Cr) contamination. However, the underlying mechanisms, especially the direct influences of AMF on the translocation and transformation of Cr in the soil−plant continuum, are still unresolved. In a two-compartment root-organ cultivation system, the extraradical mycelium (ERM) of mycorrhizal roots was treated with 0.05 mmol L −1 Cr(VI) for 12 days to investigate the uptake, translocation, and transformation of Cr(VI) by AMF using inductively coupled plasma mass spectrometry (ICP-MS), scanning electron microscopy equipped with energy-dispersive spectroscopy (SEM−EDS), transmission electron microscopy equipped with energy-dispersive spectroscopy (TEM−EDS), and X-ray-absorption fine structure (XAFS) technologies. The results indicated that AMF can immobilize quantities of Cr via reduction of Cr(VI) to Cr(III), forming Cr(III)−phosphate analogues, likely on the fungal surface. Besides this, we also confirmed that the extraradical mycelium (ERM) can actively take up Cr [either in the form of Cr(VI) or Cr(III)] and transport Cr [potentially in the form of Cr(III)-histidine analogues] to mycorrhizal roots but immobilize most of the Cr(III) in the fungal structures. Based on an X-ray absorption nearedge spectroscopy analysis of Cr(VI)-treated roots, we proposed that the intraradical fungal structures can also immobilize Cr within mycorrhizal roots. Our findings confirmed the immobilization of Cr by AMF, which plays an essential role in the Cr(VI) tolerance of AM symbioses.

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Arbuscular mycorrhiza enhanced arsenic resistance of both white clover (Trifolium repens Linn.) and ryegrass (Lolium perenne L.) plants in an arsenic-contaminated soil

Cited by 127 publications

References 26 publications

The Arbuscular Mycorrhiza Rhizophagus intraradices Reduces the Negative Effects of Arsenic on Soybean Plants

The Arbuscular Mycorrhiza Rhizophagus intraradices Reduces the Negative Effects of Arsenic on Soybean Plants

Metal uptake, oxidative metabolism, and mycorrhization in pigeonpeaand pea under arsenic and cadmium stress

Transformation and Immobilization of Chromium by Arbuscular Mycorrhizal Fungi as Revealed by SEM–EDS, TEM–EDS, and XAFS

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