In vitro study of plant growth promoting rhizobacteria (PGPR) and endophytic bacteria antagonistic to Ralstonia solanacearum formulated with graphite and silica nano particles as a biocontrol delivery system (BDS)

Djaya, Luciana; Hersanti,; Istifadah, Noor; Hartati, Sri; Joni, I Made

doi:10.1016/j.bcab.2019.101153

Cited by 36 publications

(14 citation statements)

References 20 publications

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“…In modern agriculture, the use of pesticides and chemical fertilizers is becoming more limited, and PGPR are attracting more and more attention. PGPR can not only be used as plant growth regulators but also as biological control agents (Recep et al, 2009;Bal et al, 2013a;Zhang and Kong, 2014;Djaya et al, 2019). PGPR's associated with diverse plant hosts including tobacco variety K326 (Zhang and Kong, 2014), sudan grass var Sudanensis (Basak and Biswas, 2009), rice (cv.…”

Section: Introductionmentioning

confidence: 99%

Transcriptome Profiles Reveal the Growth-Promoting Mechanisms of Paenibacillus polymyxa YC0136 on Tobacco (Nicotiana tabacum L.)

et al. 2020

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Paenibacillus polymyxa is an important member of the plant growth-promoting rhizobacteria. P. polymyxa YC0136 inoculation had beneficial effect on growth promotion and biological control of tobacco (Nicotiana tabacum L.) under field conditions. This study aimed to reveal the growth-promoting mechanisms of strain YC0136. In growthpromotion assays, tobacco plant height was increased by 8.42% and 8.25% at 60 and 90 days, respectively, after inoculation with strain YC0136. Strain YC0136 also promoted the accumulation of tobacco biomass in varying degrees. Following inoculation with strain YC0136, 3,525 and 4,368 tobacco genes were up-regulated and down-regulated, respectively. Strain YC0136 induced the expression of plant hormone-related genes in tobacco, including auxin, cytokinin, and gibberellin, as well as transcription factors related to stress resistance such as WRKY and MYB. In addition, strain YC0136 induced the up-regulation of genes in the phenylpropanoid biosynthesis pathway by 1.51-4.59 times. Interaction with tobacco also induced gene expression changes in strain YC0136, with 286 and 223 genes up-regulated and down-regulated, respectively. Tobacco interaction induced up-regulation of the ilvB gene related to auxin biosynthesis in strain YC0136 by 1.72 times and induced expression of some nutrient transport genes. This study contributes to our understanding of the growth-promoting mechanisms of strain YC0136 on tobacco and provides a theoretical basis for the application of P. polymyxa YC0136 as a biological fertilizer.

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Section: Introductionmentioning

confidence: 99%

Transcriptome Profiles Reveal the Growth-Promoting Mechanisms of Paenibacillus polymyxa YC0136 on Tobacco (Nicotiana tabacum L.)

et al. 2020

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“…There are many reports on plant growth-promoting rhizobacteria (PGPR) strains isolated from wheat [ 22 , 23 , 24 ]. Isolation of PGPR strains is a crucial step in creation of an effective biofertilizer by selection of strains of microorganisms suitable for plants.…”

Section: Discussionmentioning

confidence: 99%

A Comprehensive Analysis Using Colorimetry, Liquid Chromatography-Tandem Mass Spectrometry and Bioassays for the Assessment of Indole Related Compounds Produced by Endophytes of Selected Wheat Cultivars

et al. 2021

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Liquid chromatography–tandem mass spectrometry (LC–MS/MS), colorimetry, and bioassays were employed for the evaluation of the ability of endophytic bacterial strains to synthesize indole-related compounds (IRCs) and in particular indole-3-acetic acid (IAA). A total of 54 endophytic strains belonging to seven bacterial genera isolated from tissues of common and spelt wheat cultivars were studied. The endophytic bacteria isolated from different tissues of the tested wheat types were capable of IRCs production, including IAA, which constituted from 1.75% to 52.68% of all IRCs, in in vitro conditions via the tryptophan dependent pathway. The selected post-culture medium was also examined using a plant bioassay. Substantial growth of wheat coleoptile segments treated with the bacterial post-culture medium was observed in several cases. Our data suggest that the studied endophytic bacteria produce auxin-type compounds to support plant development. Summarizing, our approach to use three complementary methods for estimation of IRCs in different endophytic strains provides a comprehensive picture of their effect on wheat growth.

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“…The inhibitory efficiency of 3 mycelial fungus (A. alternata, B. cinerea, P. nicotianae ) was estimated by the method consistent with 1.3.1, whereas bacterial pathogen R. solanacearum was evaluated by using filter paper method (32). Filter paper discs (5 mm diameter) were submerged in antagonist suspensions.…”

Section: Methodsmentioning

confidence: 99%

Biocontrol of PGPR strain Bacillus amyloliquefaciens Ba168 against Phytophthora nicotianae on tobacco

Guo

Yuan

Luo

et al. 2019

Preprint

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Abstract： 9Tobacco black shank (TBS) caused by Phytophthora nicotianae is destructive to almost all 10 kinds of tobacco cultivars and is widespread in many tobacco-planted countries. Here, an isolated 11 plant growth-promoting rhizobacteria (PGPR) strain Ba168 is promise in biocontrol of TBS. In 12 vitro assays disclosed a strong P. nicotianae suppression activity and the field utilization potential 13 (FUP) by characterized the crude extract of culture filtrates of Ba168. P. nicotianae's growth was 14 inhibited by the crude extract at minimum inhibitory concentration (MIC) of 5μl/mL. Extracellular 15 conductivity, pH and the wet, dry weight of P. nicotianae's mycelia, were significantly different 16 after treated with different concentrations of the crude extract and the deformity and perforation of 17 treated P. nicotianae's hyphae can be observed in scanning electron microscope (SEM) analysis. 18Proteome characterizations of the crude extract were used as supplementary proofs that further 19 evaluated FUP of Ba168. We then identified strain Ba168 as B. amyloliquefaciens by its genetic 20 and phenotypic characteristics. Field assays comparatively evaluated TBS control efficacy of these 21PGPRs and agrochemicals. Pooling analysis of the results showed that the biocontrol efficacy of 22Ba168 preparation is only lower than Mixture of Propamocarb hydrochloride and Azoxystrobin 23 (MPA) but better than other tested subjects. Although the existence of differences in biocontrol 24 efficacy, PGPR preparations effectively reduced the disease index of tobacco. 25

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In vitro study of plant growth promoting rhizobacteria (PGPR) and endophytic bacteria antagonistic to Ralstonia solanacearum formulated with graphite and silica nano particles as a biocontrol delivery system (BDS)

Cited by 36 publications

References 20 publications

Transcriptome Profiles Reveal the Growth-Promoting Mechanisms of Paenibacillus polymyxa YC0136 on Tobacco (Nicotiana tabacum L.)

Transcriptome Profiles Reveal the Growth-Promoting Mechanisms of Paenibacillus polymyxa YC0136 on Tobacco (Nicotiana tabacum L.)

A Comprehensive Analysis Using Colorimetry, Liquid Chromatography-Tandem Mass Spectrometry and Bioassays for the Assessment of Indole Related Compounds Produced by Endophytes of Selected Wheat Cultivars

Biocontrol of PGPR strain Bacillus amyloliquefaciens Ba168 against Phytophthora nicotianae on tobacco

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