Volatile organic compounds produced by <scp><i>Pseudomonas pseudoalcaligenes</i></scp> alleviated drought stress by modulating defense system in maize (<scp><i>Zea mays</i></scp> L.)

Yasmin, Humaira; Rashid, Urooj; Hassan, Muhammad Nadeem; Nosheen, Asia; Naz, Rabia; Ilyas, Noshin; Sajjad, Muhammad; Azmat, Ammar; Alyemeni, Mohammed Nasser

doi:10.1111/ppl.13304

Cited by 63 publications

(29 citation statements)

References 69 publications

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“…2,3-butanedione was decreased in (S)reutericyclin fed mice. It is a plant-growth promoting compound [36] emitted from Bacillus subtilis [37] and has been reported in the headspace of Pseudomonas pseudoalcaligenes [38] and Bacillus mojavensis [36] cultures, but was not previously reported in fecal samples of mice. Among other substances 2-heptanone showed elevations in tissue and fecal samples of dairy cattle and goats infected with Mycobacterium avium subspecies paratuberculosis [39].…”

Section: Discussionmentioning

confidence: 94%

(S)-Reutericyclin: Susceptibility Testing and In Vivo Effect on Murine Fecal Microbiome and Volatile Organic Compounds

Kienesberger

Obermüller

Singer

et al. 2021

IJMS

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We aimed to assess the in vitro antimicrobial activity and the in vivo effect on the murine fecal microbiome and volatile organic compound (VOC) profile of (S)-reutericyclin. The antimicrobial activity of (S)-reutericyclin was tested against Clostridium difficile, Listeria monocytogenes, Escherichia coli, Enterococcus faecium, Staphylococcus aureus, Staphylococcus (S.) epidermidis, Streptococcus agalactiae, Pseudomonas aeruginosa and Propionibacterium acnes. Reutericyclin or water were gavage fed to male BALBc mice for 7 weeks. Thereafter stool samples underwent 16S based microbiome analysis and VOC analysis by gas chromatography mass spectrometry (GC-MS). (S)-reutericyclin inhibited growth of S. epidermidis only. Oral (S)-reutericyclin treatment caused a trend towards reduced alpha diversity. Beta diversity was significantly influenced by reutericyclin. Linear discriminant analysis Effect Size (LEfSe) analysis showed an increase of Streptococcus and Muribaculum as well as a decrease of butyrate producing Ruminoclostridium, Roseburia and Eubacterium in the reutericyclin group. VOC analysis revealed significant increases of pentane and heptane and decreases of 2,3-butanedione and 2-heptanone in reutericyclin animals. The antimicrobial activity of (S)-reutericyclin differs from reports of (R)-reutericyclin with inhibitory effects on a multitude of Gram-positive bacteria reported in the literature. In vivo (S)-reutericyclin treatment led to a microbiome shift towards dysbiosis and distinct alterations of the fecal VOC profile.

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Section: Discussionmentioning

confidence: 94%

(S)-Reutericyclin: Susceptibility Testing and In Vivo Effect on Murine Fecal Microbiome and Volatile Organic Compounds

Kienesberger

Obermüller

Singer

et al. 2021

IJMS

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“…BRISH6 mitigates the toxic effect of deficit water stress and lowered levels of components of the antioxidative defense system, viz., SOD, CAT, APX, POD, GPX, and polyphenol oxidase, in Zea mays [ 20 ]. Similarly, PGPR strain P. pseudoalcaligenes alleviated water stress in Z. mays and enhanced antioxidant defense enzyme levels by modulating the defense system under different levels of water stress [ 21 ]. Likewise, plants treated with drought tolerating strains of Bacillus species acquired drought resistance by lowering the activity of antioxidant enzymes such as APX and GR [ 71 ].…”

Section: Resultsmentioning

confidence: 99%

“…Many recent studies have demonstrated the importance of PGPR, such as Ochrobactrum sp. [ 20 ] and Pseudomonas pseudoalcaligenes [ 21 ], for the amelioration of drought stress in edible crops. For example, when drought-tolerant PGPR strains were administered as soil inoculants to maize plants grown in a water deficit environment, they significantly improved the growth, root elongation, and NPK uptake by reducing ethylene levels in plants [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Drought Tolerant Enterobacter sp./Leclercia adecarboxylata Secretes Indole-3-acetic Acid and Other Biomolecules and Enhances the Biological Attributes of Vigna radiata (L.) R. Wilczek in Water Deficit Conditions

Ahmed

Shahid

Syed

et al. 2021

Biology

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Drought or water stress is a limiting factor that hampers the growth and yield of edible crops. Drought-tolerant plant growth-promoting rhizobacteria (PGPR) can mitigate water stress in crops by synthesizing multiple bioactive molecules. Here, strain PAB19 recovered from rhizospheric soil was biochemically and molecularly characterized, and identified as Enterobacter sp./Leclercia adecarboxylata (MT672579.1). Strain PAB19 tolerated an exceptionally high level of drought (18% PEG-6000) and produced indole-3-acetic acid (176.2 ± 5.6 µg mL−1), ACC deaminase (56.6 ± 5.0 µg mL−1), salicylic acid (42.5 ± 3.0 µg mL−1), 2,3-dihydroxy benzoic acid (DHBA) (44.3 ± 2.3 µg mL−1), exopolysaccharide (204 ± 14.7 µg mL−1), alginate (82.3 ± 6.5 µg mL−1), and solubilized tricalcium phosphate (98.3 ± 3.5 µg mL−1), in the presence of 15% polyethylene glycol. Furthermore, strain PAB19 alleviated water stress and significantly (p ≤ 0.05) improved the overall growth and biochemical attributes of Vigna radiata (L.) R. Wilczek. For instance, at 2% PEG stress, PAB19 inoculation maximally increased germination, root dry biomass, leaf carotenoid content, nodule biomass, leghaemoglobin (LHb) content, leaf water potential (ΨL), membrane stability index (MSI), and pod yield by 10%, 7%, 14%, 38%, 9%, 17%, 11%, and 11%, respectively, over un-inoculated plants. Additionally, PAB19 inoculation reduced two stressor metabolites, proline and malondialdehyde, and antioxidant enzymes (POD, SOD, CAT, and GR) levels in V. radiata foliage in water stress conditions. Following inoculation of strain PAB19 with 15% PEG in soil, stomatal conductance, intercellular CO2 concentration, transpiration rate, water vapor deficit, intrinsic water use efficiency, and photosynthetic rate were significantly improved by 12%, 8%, 42%, 10%, 9% and 16%, respectively. Rhizospheric CFU counts of PAB19 were 2.33 and 2.11 log CFU g−1 after treatment with 15% PEG solution and 8.46 and 6.67 log CFU g−1 for untreated controls at 40 and 80 DAS, respectively. Conclusively, this study suggests the potential of Enterobacter sp./L. adecarboxylata PAB19 to alleviate water stress by improving the biological and biochemical features and of V. radiata under water-deficit conditions.

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“…They also improved the chemical composition of essential oils (Çakmakçı et al 2020). The application of Pseudomonas pseudoalcaligenes enhanced the phytohormones, chlorophyll content antioxidant production and the activities of antioxidant enzymes in Z. mays facing drought stress (Yasmin et al 2021).…”

Section: Discussionmentioning

confidence: 97%

Role of nanosilicab to boost the activities of metabolites in Triticum aestivum facing drought stress

Akhtar¹,

Ilyas²

2021

Preprint

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Drought stress is a threat to agriculture which is decreasing the yield of crops and creating a considerable loss. This research focused on the part played by silicon dioxide nanoparticles (SiO2 NPs), biofertilizers, and nanosilicab on Triticum aestivum under control and drought stress. Nanosilicab enhanced the germination percentage, germination index, and germination vigor index by 23.07%, 14.49% and, 93.10% under control and 14.42%, 10.52%, and 46.15% under drought. In the pot experiment, the soil was treated with 150 mg/kg SiO2 NPs, 1% biofertilizer and, 1% nanosilicab before sowing. Nanosilicab increased shoot length and root length by 9.39%, 10.76%, 22.41%, 18.76%, 30.58%, and, 21.56% under control and drought stress conditions. It also increased photosynthetic pigments, osmolytes content, relative water content, membrane stability index, phenol, and flavonoid content. The increase in antioxidant activity was significantly high by the application of nanosilicab i.e. the augmentation in catalase, peroxidase, and superoxide dismutase was 68.65%, 83.69% and, 85.99% respectively. It also increased the indole acetic acid and cytokinin to 22.28% and 14.79% in comparison to control. The improvement in hundred grain weight and grains per spike by the use of nanosilicab was 36.25%, 38.76%, 27.47%, and 22.59% as compared to control. The positive interaction of nanosilicab with the roots of plants in the rhizosphere improved the growth of plants significantly and a potential candidate for application on crops. The novelty of this study lies in the formulation of nanosilicab and its role in drought amelioration.

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Volatile organic compounds produced by Pseudomonas pseudoalcaligenes alleviated drought stress by modulating defense system in maize (Zea mays L.)

Cited by 63 publications

References 69 publications

(S)-Reutericyclin: Susceptibility Testing and In Vivo Effect on Murine Fecal Microbiome and Volatile Organic Compounds

(S)-Reutericyclin: Susceptibility Testing and In Vivo Effect on Murine Fecal Microbiome and Volatile Organic Compounds

Drought Tolerant Enterobacter sp./Leclercia adecarboxylata Secretes Indole-3-acetic Acid and Other Biomolecules and Enhances the Biological Attributes of Vigna radiata (L.) R. Wilczek in Water Deficit Conditions

Role of nanosilicab to boost the activities of metabolites in Triticum aestivum facing drought stress

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