Safety assessment of biocontrol and plant growth-promoting pseudomonads useful in crop production

Sundh, Ingvar; Hökeberg, Margareta; Levenfors, Jolanta J.; Nilsson, Åsa

doi:10.1111/j.1744-7348.2011.00498.x

Cited by 9 publications

(4 citation statements)

References 51 publications

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“…The interaction between microorganisms and plants can be beneficial to both under normal or stressful conditions (Andrews et al , ; Karamanoli et al , ; Martins et al , ; Sundh et al , ; Andrews et al , ; Sathyapriya et al , ). In the environment, plant roots interact with soil microorganisms, including metal‐resistant microbes, that can promote plant growth by facilitating the solubilisation or mobilisation of soil metals (Burd et al , ; Madhaiyan et al , ).…”

Section: Introductionmentioning

confidence: 99%

Burkholderia sp. SCMS54 reduces cadmium toxicity and promotes growth in tomato

Dourado

Martins

Quecine

et al. 2013

Annals of Applied Biology

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Cadmium (Cd) can enter soil through the use of fertilisers, calcareous, pesticides and industrial and/or domestic effluents. Cd can leach into groundwater and be taken up by plants, potentially leading to reductions in plant growth and yield. In soil, plant roots interact with heavy metal (HM)-tolerant microorganisms that may promote plant growth. Soil microorganisms may also be able to solubilise or mobilise soil metals, thereby acting as bioremediators. A better understanding of the interaction among plants, metals, microorganisms and soil will lead to improved plant tolerance. Two multi-tolerant bacteria from the Burkholderia genus were isolated from Cd-contaminated and Cduncontaminated soil of a coffee plantation. In addition to its high tolerance to Cd, the strain SCMS54 produces indole-acetic acid (IAA), solubilises inorganic phosphate and produces siderophores, demonstrating its potential to contribute to beneficial plant-microorganism interactions. When interacting with tomato plants exposed to Cd, the bacterium led to decreases in plant peroxide and chlorosis levels, promoted relative plant growth and decreased the root absorption of Cd, resulting in increased plant tolerance to this highly toxic HM. The results indicated that the inoculation of tomato plants with Burkholderia sp. SCMS54 promotes better growth in plants cultivated in the presence of Cd. This phenomenon appears to be attributed to a mechanism that decreases Cd concentrations in the roots via a beneficial interaction between the bacteria and the plant roots.

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Section: Introductionmentioning

confidence: 99%

Burkholderia sp. SCMS54 reduces cadmium toxicity and promotes growth in tomato

Dourado

Martins

Quecine

et al. 2013

Annals of Applied Biology

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“…Therefore, the strains of PGPMs may represent a potential threat to humans, animals and the environment. Thus, more information is required regarding the toxicity of these strains, and clinical tests in the laboratory should be conducted for the purposes of safety before they are used [ 95 , 96 ].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Multifarious Plant Growth Promoting Trials of Yeast Isolated from the Soil of Assam Tea (Camellia sinensis var. assamica) Plantations in Northern Thailand

et al. 2020

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Some soil microorganisms, especially bacteria and mycorrhizal fungi, play a role in the promotion of plant growth. However, plant growth promotion involving yeasts in soil has not yet been extensively investigated. This study aimed to isolate and identify yeast strains obtained from soils of the Assam tea plant (Camellia sinensis var. assamica) in northern Thailand and to investigate their plant growth promoting capabilities. A total of 42 yeast strains were obtained and identified by analysis of the D1/D2 domain of the large subunit ribosomal RNA gene. We identified 35 strains of six species belonging to the phylum Ascomycota, namely Aureobasidium melanogenum, Kazachstania aquatica, Saturnispora diversa, Saturnispora sekii, Schwanniomyces pseudopolymorphus and Wickerhamomyces anomalus, and six species were determined to belong to the phylum Basidiomycota, namely Apiotrichum scarabaeorum, Curvibasidium pallidicorallinum, Papiliotrema laurentii, Rhodosporidiobolus ruineniae, Trichosporon asahii and Trichosporon coremiiforme. Seven strains were representative of potential new species and belonged to the genera Galactomyces and Wickerhamomyces. A total of 28 strains were found to produce indole-3-acetic acid (IAA) in a range of 2.12 to 37.32 mg/L, with the highest amount of IAA produced by R. ruineniae SDBR-CMU-S1-03. All yeast strains were positive in terms of ammonia production, and only eight strains were positive for siderophore production. Two yeast species, P. laurentii and W. anomalus, were able to solubilize the insoluble form of calcium and zinc. The ability to produce amylase, endogulcanase, lipase, pectinase, protease and xylanase was dependent upon the yeast species and strain involved.

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“…For hypersensitivity reaction and pathogenicity assays, each bacterial isolate was cultured in LB broth medium for 24 h (cell concentration was approximately ±10 6 CFU ⋅ ml -1 ). One ml of each bacterial culture was injected into tobacco leaves using a needleless syringe (Sundh et al 2011) and inoculated into one-month-old rice leaves var. Ciherang following leaf clipping.…”

Section: Hemolysis Hypersensitivity and Pathogenicity Assaysmentioning

confidence: 99%

Journal of Plant Protection Research

Wiraswati,

Rusmana,

Nawangsih

et al. 2019

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Rice blast is the main disease of rice plants in Indonesia and several countries worldwide. Controlling this disease using chemical fungicides has harmful effects on the environment. Therefore, we need biocontrol agents which are more environmentally friendly such as rice phyllosphere bacteria. This study aimed to explore bacteria producing bioactive compounds from the rice phyllosphere environment to control blast disease. A total of 88 isolates were successfully isolated from rice leaves in Sukabumi, Situgede, and Jasinga (West Java, Indonesia). From them, we obtained 22 bacteria isolates with antifungal activity against Pyricularia oryzae in vitro assay. In addition, seven non-pathogenic bacteria were obtained from further screening in hypersensitivity, hemolysis and pathogenicity assays, namely STGG 3, STGG 7, STGG 8, STGG 14, SKBV 1, STGV 8, and SKBG 78. To show their antifungal activity, we tested crude extracts of these seven isolates and the results revealed that all the crude extracts can inhibit the growth of P. oryzae. Based on a genetic approach, isolates STGG 3, STGG 7, and STGG 14 were found to have both nonribosomal peptide synthetases (NRPS) and polyketide synthases (PKS) genes, while isolate SKBV 1 only had the NRPS gene. The NRPS and PKS genes from potential isolates were similar to NRPS and PKS genes of Bacillus sp. in different strains. Furthermore, molecular identification based on the 16S rRNA gene revealed that the seven potential isolates belong to three genera, i.e. Bacillus (STGG 3, STGG 7, STGG 8, STGG 14, SKBV 1), Enterobacter (STGV 8) and Brachybacterium (SKBG 78). We suggest that the seven isolates found in this study have potency and could be recommended as biocontrol agents of blast disease caused by P. oryzae.

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Safety assessment of biocontrol and plant growth-promoting pseudomonads useful in crop production

Cited by 9 publications

References 51 publications

Burkholderia sp. SCMS54 reduces cadmium toxicity and promotes growth in tomato

Burkholderia sp. SCMS54 reduces cadmium toxicity and promotes growth in tomato

Evaluation of Multifarious Plant Growth Promoting Trials of Yeast Isolated from the Soil of Assam Tea (Camellia sinensis var. assamica) Plantations in Northern Thailand

Journal of Plant Protection Research

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