Effect of specific plant‐growth‐promoting rhizobacteria (<scp>PGPR</scp>) on growth and uptake of neonicotinoid insecticide thiamethoxam in corn (<i>Zea mays</i> L.) seedlings

Myresiotis, Charalampos K.; Vryzas, Zisis; Papadopoulou‐Mourkidou, Euphemia

doi:10.1002/ps.3919

Cited by 50 publications

(47 citation statements)

References 38 publications

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“…The combination of PGPR and insecticides for prolonged periods (2 wk) represents a scenario where the two tactics would either be mixed before application or interacting in the soil. The stability of the PGPR in Blend 20 mixed with certain insecticides is not surprising, given that Bacillus subtilus used with thiamethoxam in corn seeds increases pesticide uptake and plant growth . There does not appear to be products formulated containing both bacteria and pesticide(s), however our data suggest this approach may be a novel and integrated approach for pest management.…”

Section: Discussionmentioning

confidence: 75%

“…The stability of the PGPR in Blend 20 mixed with certain insecticides is not surprising, given that Bacillus subtilus used with thiamethoxam in corn seeds increases pesticide uptake and plant growth. 34 There does not appear to be products formulated containing both bacteria and pesticide(s), however our data suggest this approach may be a novel and integrated approach for pest management. With the environmental concerns over neonicotinoids used in agricultural and commodity crops, including turfgrasses, increased pesticide efficiency and post-treatment irrigation could alleviate some concerns and may enable lower use rates.…”

Section: Discussionmentioning

confidence: 76%

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Rhizobacterial treatments of tall fescue and bermudagrass increases tolerance to damage from white grubs

Coy

Held

Kloepper³

2019

Pest Management Science

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Background Inoculation of hybrid bermudagrass with plant growth‐promoting rhizobacteria (PGPR) can increase plant growth and influence relationships with above‐ground herbivores like fall armyworms. However, few experiments have evaluated PGPR applications relative to root herbivory. Root‐feeding white grubs cause severe damage to grasses, especially in tall fescue pastures, golf courses, and lawns. Since bacterial inoculants enhance root growth, the goal of this study was to determine if the inoculation of hybrid bermudagrass by rhizobacteria can increase the tolerance of tall fescue and hybrid bermudagrass to damage from white grub feeding, and if PGPR are compatible with neonicotinoid insecticides commonly used for white grub control. Results In trials with tall fescue and hybrid bermudagrass, grasses were treated with the PGPR strain mixture Blend 20 or nitrogen or left non‐treated and were then infested with Japanese beetle grubs. Grasses treated with PGPR and nitrogen fertilizer produced significantly more top growth than the non‐treated grub‐infested controls. Tall fescue and hybrid bermudagrass treated with Blend 20 produced root mass similar to or greater than nitrogen fertilized grasses. Both grasses treated with Blend 20 had greater root mass than non‐treated infested grass. No treatment negatively impacted grub survival, and weight gains of grubs were similar for all treatments. Bacterial strains were typically compatible with insecticides used to control white grubs. Conclusion PGPR and nitrogen fertilization stimulate root growth resulting in tolerance of tall fescue and hybrid bermudagrass to white grub infestation. PGPR, acting as biostimulants to increase root biomass on grasses, may have utility for IPM of root herbivores. © 2019 Society of Chemical Industry

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Section: Discussionmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 76%

Rhizobacterial treatments of tall fescue and bermudagrass increases tolerance to damage from white grubs

Coy

Held

Kloepper³

2019

Pest Management Science

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“…Various studies in the literature have reported that rhizospheric microorganisms, especially rhizobacteria, show excellent results in promoting plant growth (Ahemad and Kibret, 2014;Lugtenberg and Kamilova, 2009;Myresiotis et al, 2014;Prashar et al, 2014). Another extensively studied group is the endophytic microorganisms, similar to the rhizobacteria, with the potential for use in various other economic crops (Brader et al, 2014;Hallmann et al, 1997;Rosenblueth and Martinez Romero, 2006;Shen et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Temperature, pH and carbon source affect drastically indole acetic acid production of plant growth promoting yeasts

Scarcella

Bizarria

Bastos

et al. 2017

Braz. J. Chem. Eng.

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-Rhizosphere and phylloplane yeasts are able to produce phytohormones, acting as potential plant growth promoters. The aim of this study was to analyze the production of indole acetic acid (IAA) by yeasts using variations in the culture conditions. The yeasts evaluated were Rhodotorula mucilaginosa and Trichosporon asahii, which were cultivated in a potato broth medium with 20 g/L of glucose or sucrose as the carbon source. The cultivation was carried out at 22°C, 25°C or 30°C, and the initial pH was adjusted to 3.0, 4.5 or 6.0. The cultures were analyzed using a colorimetric technique with Salkowski reagent. The cell count was determined in all of the conditions. The results for T. asahii showed that IAA production with sucrose was superior at pH 6.0, and that with glucose was superior at pH 4.5. These results indicate an association between the carbon source and medium pH. Rh. mucilaginosa (2F32) presented a high IAA production when compared with T. asahii (3S44 and 4C06) or even with other microorganisms referenced in the literature. The highest production (0.655 g/L) was obtained at pH 6.0 with glucose as the carbon source. Variations in the culture conditions did not affect the cell growth of the yeasts.

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“…According to our studies, PGPR enhanced uptake of thiamethoxam and acibenzolar- S -methyl in corn and tomato plants, respectively (Myresiotis et al, 2014, 2015). During integrated control management against soilborne plant pathogens studied by our group, increased efficacy of pesticides was observed when PGPR were combined with soil applied pesticides (Myresiotis et al, 2012a).…”

Section: The Plant As Metaorganism and Soil Applied Pesticidesmentioning

confidence: 66%

The Plant as Metaorganism and Research on Next-Generation Systemic Pesticides – Prospects and Challenges

Vryzas

2016

Front. Microbiol.

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Systemic pesticides (SPs) are usually recommended for soil treatments and as seed coating agents and are taken up from the soil by involving various plant-mediated processes, physiological, and morphological attributes of the root systems. Microscopic insights and next-generation sequencing combined with bioinformatics allow us now to identify new functions and interactions of plant-associated bacteria and perceive plants as meta-organisms. Host symbiotic, rhizo-epiphytic, endophytic microorganisms and their functions on plants have not been studied yet in accordance with uptake, tanslocation and action of pesticides. Root tips exudates mediated by rhizobacteria could modify the uptake of specific pesticides while bacterial ligands and enzymes can affect metabolism and fate of pesticide within plant. Over expression of specific proteins in cell membrane can also modify pesticide influx in roots. Moreover, proteins and other membrane compartments are usually involved in pesticide modes of action and resistance development. In this article it is discussed what is known of the physiological attributes including apoplastic, symplastic, and trans-membrane transport of SPs in accordance with the intercommunication dictated by plant–microbe, cell to cell and intracellular signaling. Prospects and challenges for uptake, translocation, storage, exudation, metabolism, and action of SPs are given through the prism of new insights of plant microbiome. Interactions of soil applied pesticides with physiological processes, plant root exudates and plant microbiome are summarized to scrutinize challenges for the next-generation pesticides.

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Effect of specific plant‐growth‐promoting rhizobacteria (PGPR) on growth and uptake of neonicotinoid insecticide thiamethoxam in corn (Zea mays L.) seedlings

Abstract: The findings suggest that the PGPR-elicited enhanced uptake of thiamethoxam could lead to improved efficiency of thiamethoxam using reduced rates of pesticides in combination with PGPR as an alternative crop protection technique.

Cited by 50 publications

References 38 publications

Rhizobacterial treatments of tall fescue and bermudagrass increases tolerance to damage from white grubs

Rhizobacterial treatments of tall fescue and bermudagrass increases tolerance to damage from white grubs

Temperature, pH and carbon source affect drastically indole acetic acid production of plant growth promoting yeasts

The Plant as Metaorganism and Research on Next-Generation Systemic Pesticides – Prospects and Challenges

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