Effect of a vesicular-arbuscular mycorrhizal fungus ( Glomus epigaeus ) on herbicide uptake by roots

Nedumpara, Mercy Joseph; Jayachandran, Krish

doi:10.1007/s003740050590

Cited by 9 publications

(9 citation statements)

References 17 publications

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“…This phenomenon could be attributed to the increased atrazine adsorption on roots by mycorrhizal colonization. Nedumpara et al (1999) confirmed that atrazine adsorption on excised roots segments was increased by AM fungus for soybean and maize. In addition AM fungi may influence the uptake of atrazine via the mycorrhizosphere effect, whereby their mycelial systems in soil may influence the structure and activities of soil microbial assemblages (see Smith and Read, 1997).…”

Section: Discussionsupporting

confidence: 60%

Effect of arbuscular mycorrhizal fungus (Glomus caledonium) on the accumulation and metabolism of atrazine in maize (Zea mays L.) and atrazine dissipation in soil

Huang

Zhang

Shan

et al. 2007

Environmental Pollution

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Arbuscular mycorrhizal fungus increases the accumulation and metabolism of atrazine in maize. AbstractEffects of an arbuscular mycorrhizal (AM) fungus (Glomus caledonium) on accumulation and metabolism of atrazine in maize grown in soil contaminated with different concentrations of atrazine were investigated in a series of pot experiments. Roots of mycorrhizal plants accumulated more atrazine than non-mycorrhizal roots. In contrast, atrazine accumulation in shoot decreased in mycorrhizal compared with nonmycorrhizal plants. No atrazine derivatives were detected in the soil, either with or without mycorrhizal colonization. However, atrazine metabolites, deethylatrazine (DEA) and deisopropylatrazine (DIA), were detected in plant roots and the AM colonization enhanced the metabolism. After plant harvest atrazine concentrations decreased markedly in the soils compared to the initial concentrations. The decreases were the most in rhizosphere soil and then near-rhizosphere soil and the least in bulk soil. Mycorrhizal treatment enhanced atrazine dissipation in the nearrhizosphere and bulk soils irrespective of atrazine application rates.

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Section: Discussionsupporting

confidence: 60%

Effect of arbuscular mycorrhizal fungus (Glomus caledonium) on the accumulation and metabolism of atrazine in maize (Zea mays L.) and atrazine dissipation in soil

Huang

Zhang

Shan

et al. 2007

Environmental Pollution

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“…On the other hand, growth of citrus plants increased following benomyl application, as compared to untreated plants, probably by reducing the C costs of the symbiosis under P-sufficient conditions (Graham & Eissenstat 1998). Finally, the AMF can also significantly contribute to uptake of herbicides atrazine and trifluralin by roots of maize and soybeans and thus may potentially play a role in the toxicity of herbicides to some plants (Nedumpara et al 1999).…”

Section: Use Of Pesticides and Soil Sterilizationmentioning

confidence: 98%

The effects of agricultural practices on arbuscular mycorrhizal fungi

2006

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Arbuscular mycorrhizal fungi (AMF) form symbiotic associations with the majority of land plants, including many important agricultural crops. These fungi facilitate plant nutrient uptake, promote soil aggregation and use a significant portion of reduced carbon from the plants. AMF functional traits differ considerably among and within species, meaning that functional properties of a mycorrhizal community depend on its composition. Here we review studies exploring the effects of agricultural practices such as tillage, crop rotation, fertilization, pesticide application, irrigation and grazing on AMF communities. Although it is difficult to generalize the results of studies performed under different soil and climatic conditions, some universal patterns emerge. For example, soil tillage reduces the abundance of Scutellospora spp.; phosphorus fertilization lowers the extent of AMF root colonization; and diversification of crops results in more diverse AMF communities. We now need to design simple and reliable field tests for quantifying the effects of AMF communities on crop growth, yields and sustainability of the agro-ecosystems.

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“…Miles and Moye (1988) and Gimsing et al (2004) reported that the adsorbed glyphosate can readily be replaced by phosphate group but the glyphosate group cannot replace the adsorbed phosphate group easily. Application of AM fungi also enhanced the persistence of glyphosate in soil and could be the result of increased immobilization by uptake and binding which is related to the volume of root system as suggested by Nedumpara et al (1999) for atrazine. This could also be attributed to the increased foraging capacity of AM fungi in soil due to increased fungal hyphae and AMF population.…”

Section: Resultsmentioning

confidence: 90%

Influence of arbuscular mycorrhizal fungi on glyphosate dissipation rate in okra cultivated sodic soil of Tamil Nadu

Brindhavani¹,

Janaki²,

Gomadhi³

et al. 2020

JEB

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Aim: To elucidate the influence of non target Arbuscular Mycorrhizal (AM) fungi on glyphosate dissipation in okra cultivated sodic soil of Tamil Nadu. Methodology: A field experiment was carried out during Rabi 2017-18 to study the interactive effect of glyphosate and Arbuscular mycorrhizal fungi (AM) on glyphosate dissipation in sodic soil from okra (A. esculentus) grown field. Experiment was laid adopting Randomized Block Design (RBD) with different rates of glyphosate and with and without AM fungi. Glyphosate was applied as pre-plant herbicide 20 days before sowing, and AM biofertilizer was applied as basal before sowing of okra. Soil samples were collected from the field at different time interval after glyphosate application and analysed for glyphosate and Amino Methyl Phosphonic Acid (AMPA) residues. Results: Glyphosate persistence decreased with time and degraded with the mean half-life ranging from 5.09 to 10.35 days by following first order reaction kinetics. AMPA was witnessed from day 1 and increased up to 15th day and followed first order reaction kinetics dissipation with the mean half-life of 8.62 to 13.06 days. Glyphosate and AMPA residues were recorded below detection limit (0.01 mg kg-1) on 45th and 60th days, respectively, in soil. Interpretation: The higher rates of glyphosate showed enhanced persistence of glyphosate and its metabolite AMPA in soil, hence application of AM fungi 100 kg ha-1 with lower glyphosate rate of 6 ml/L can be recommended for okra cultivated sodic soil with the safer waiting period of after 45 days harvest.

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Effect of a vesicular-arbuscular mycorrhizal fungus ( Glomus epigaeus ) on herbicide uptake by roots

Cited by 9 publications

References 17 publications

Effect of arbuscular mycorrhizal fungus (Glomus caledonium) on the accumulation and metabolism of atrazine in maize (Zea mays L.) and atrazine dissipation in soil

Effect of arbuscular mycorrhizal fungus (Glomus caledonium) on the accumulation and metabolism of atrazine in maize (Zea mays L.) and atrazine dissipation in soil

The effects of agricultural practices on arbuscular mycorrhizal fungi

Influence of arbuscular mycorrhizal fungi on glyphosate dissipation rate in okra cultivated sodic soil of Tamil Nadu

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