Biological control potential of plant growth‐promoting rhizobacteria suppression of <i>Meloidogyne incognita</i> on cotton and <i>Heterodera glycines</i> on soybean: A review

Xiang, Ni; Lawrence, Kathy; Donald, P. A.

doi:10.1111/jph.12712

Cited by 109 publications

(63 citation statements)

References 56 publications

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“…P . lilacinus is well known for its applications in the biocontrol of Heterodera glycines in soybean and Meloidogyne incognita in cotton (Anastasiadis, Giannakou, Prophetou‐Athanasiadou, & Gowen, ; Xiang, Lawrence, & Donald, ). Wei et al (), using a culture‐based method, also detected a relatively high abundance of P .…”

Section: Discussionmentioning

confidence: 99%

Continuous cropping of soybean alters the bulk and rhizospheric soil fungal communities in a Mollisol of Northeast PR China

Liu

Yao

et al. 2019

Land Degrad Dev

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Continuous cropping of soybean causes soil degradation and decreased soybean yield in Northeast PR China. However, the mechanism underlying the effect on soil fungal communities and the relationship between these effects and cropping systems have not yet been fully elucidated. In this study, we comparatively investigated the abundance, diversity, and structures of fungal communities in the bulk and rhizospheric soils of soybean grown in two cropping systems, that is, continuous cropping (CC) of soybean and cropping rotation (CR) with maize using real‐time Polymerase Chain Reaction (PCR) and Illumina MiSeq sequencing methods. The results showed that the rhizospheric soil fungal abundance was significantly higher in CC than in CR, but the opposite trend was observed in bulk soils. CC decreased the fungal alpha diversity in both bulk and rhizospheric soils compared with CR. The fungal community compositions were distinctly different between CC and CR in both bulk and rhizospheric soils, and the composition and diversity in bulk soils were predominantly affected by the soil carbon to nitrigen (C/N) ratio. The soil fungal functional groups varied between the two cropping systems; CC increased the relative abundances of the potentially pathogenic fungi Fusarium oxysporum and Lectera longa and beneficial fungi Mortierella sp. and Paecilomyces lilacinus. In contrast, CR increased the relative abundance of Ustilago maydis, which is a pathogen that causes corn smut. Our findings showed that CC increased the abundances of plant pathogens, which is harmful to soybean growth; in contrast, the abundances of some beneficial fungi also increased, which suggested that suppressive soils might be developed after long‐term CC.

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Section: Discussionmentioning

confidence: 99%

Continuous cropping of soybean alters the bulk and rhizospheric soil fungal communities in a Mollisol of Northeast PR China

Liu

Yao

et al. 2019

Land Degrad Dev

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“…Gram-negative bacteria, such as Pseudomonads, Burkholderia, Arthrobacter, Achromobacter, and Rhizobium spp., are reported (Antoun 2013;Sidhu 2018;Sohrabi et al 2018). Gram-positive bacteria such as Brevibacterium, Corynebacterium, Micrococcus, Bacillus, Paenibacillus, and Sarcina are also reported (Lee and Kim 2016;Rika et al 2017;Sohrabi et al 2018;Xiang et al 2018). However, in this study, the six bacterial strains identified as Bacillus, Paenibacillus, and Lysinibacillus (Grampositive bacteria) and Pseudomonas and Achromobacter (Gram-negative bacteria) may indicate the predominance of such genera in the soil as PGPR and could be good factors for suppressing the population density of Meloidogyne spp.…”

Section: Discussionmentioning

confidence: 98%

“…The most affected stages of plant-parasitic nematodes are the egg and the second-stage juvenile. To manage with biological control, these two stages of the plantparasitic nematodes should be controlled, so that the life cycle of nematodes could be interrupted, resulting in a reduction of nematode populations (Xiang et al 2018). When come in contact with the parasite nematodes, microorganisms release lytic enzymes for effective degradation of egg shell, suppression of egg hatching, and/or inhibition of nematode activity (Xiang et al 2018).…”

Section: Discussionmentioning

confidence: 99%

In vitro evaluation of some isolated bacteria against the plant parasite nematode Meloidogyne incognita

et al. 2019

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Background: Microbial cultures are extensively used as environment friendly ways for biological control of parasitic pests, including the root-knot nematodes, alternative to the use of chemical nematicides. The present study was conducted to isolate some lytic rhizobacteria and examine their nematicidal activity against Meloidogyne incognita J 2 mortality and egg hatching in in vitro test. Results: Lytic Rhizobacteria were isolated from soil samples adhering to tomato plant roots from different localities at Giza governorate, Egypt. Six bacterial isolates, exhibited high efficacy against root-knot nematodes, were identified based on the analysis of the 16S rRNA gene sequence as Pseudomonas aeruginosa, Paenibacillus polymyxa, Lysinibacillus sphaericus, Bacillus cereus, Bacillus subtilis, and Achromobacter xylosoxidans. These strains showed high production of chitinase, chitosanase, and protease using colloidal chitin and soluble chitosan as carbon sources. Two strains, Paenibacillus polymyxa and Bacillus subtilis, produced the highest levels of chitinase in the media. Except for Pseudomonas aeruginosa, all the bacterial strains produced high levels of chitosanase. Conclusion: The results revealed that high amounts of protease were, however, secreted by Pseudomonas aeruginosa as compared to the other strains. In in vitro tests, all the bacterial culture filtrates potentially displayed nematicidal effect in M. incognita egg hatching and an obvious increase in J 2 mortality as compared to control. Paenibacillus polymyxa caused 100% juvenile mortality followed by Bacillus subtilis 97.25%, Bacillus cereus 94%, Achromobacter xylosoxidans 93%, Lysinibacillus sphaericus 92%, and Pseudomonas aeruginosa 84.29% after 48 h of exposure, as compared to control.

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“…Several Bacillus spp. have been reported in association to PPNs worldwide, and it is likely that, due to the wide diversity of this bacterial clade, new species or taxa specialized in nematode parasitism or plant growth promotion may be discovered in newly sampled areas [54][55][56].…”

Section: Discussionmentioning

confidence: 99%

Diversity of Nematode Microbial Antagonists from Algeria Shows Occurrence of Nematotoxic Trichoderma spp.

Benttoumi¹,

Colagiero

Sellami³

et al. 2020

Plants

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Fungi and bacteria associated to phytoparasitic nematodes Globodera rostochiensis and Meloidogyne spp. in Algeria were identified and characterized. Trichoderma spp. showed the highest prevalence in the cysts of G. rostochiensis. A number of isolates were identified through PCR amplification and the sequencing of the internal transcribed spacer (ITS)1-2 and Rpb2 gene regions. The most represented species were T. harzianum and T. afroharzianum. The latter and T. hirsutum were reported for the first time in Algeria. Fusarium spp., including F. oxysporum and F. solani, comprised a second group of fungi found in cysts. Taxa associated to females of Meloidogyne spp. included T. harzianum, Fusarium spp. and other hyphomycetes. To assess the efficacy of Trichoderma spp., two assays were carried out in vitro with the culture filtrates of two T. afroharzianum and T. harzianum isolates, to check their toxicity versus the second stage juveniles of M. incognita. After 24–48 h exposure, a mortality significantly higher than the control was observed for both filtrates at 1% dilutions. The TRI genes involved in the production of trichothecenes were also amplified with the PCR from some Trichoderma spp. isolates and sequenced, supporting a putative role in nematode toxicity. Bacteria isolated from the cysts of G. rostochiensis included Brucella, Rhizobium, Stenotrophomonas and Bacillus spp., identified through 16S rRNA gene sequencing. The potential of the microbial isolates identified and their mechanisms of action are discussed, as part of a sustainable nematode management strategy.

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Biological control potential of plant growth‐promoting rhizobacteria suppression of Meloidogyne incognita on cotton and Heterodera glycines on soybean: A review

Cited by 109 publications

References 56 publications

Continuous cropping of soybean alters the bulk and rhizospheric soil fungal communities in a Mollisol of Northeast PR China

Continuous cropping of soybean alters the bulk and rhizospheric soil fungal communities in a Mollisol of Northeast PR China

In vitro evaluation of some isolated bacteria against the plant parasite nematode Meloidogyne incognita

Diversity of Nematode Microbial Antagonists from Algeria Shows Occurrence of Nematotoxic Trichoderma spp.

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