Rhizobacteria improve the germination and modify the phenolic compound profile of pepper (Capsicum annum L.)

Ureche, M.; Pérez-Rodriguez, María Micaela; Ortiz, R.; Monasterio, Romina Paula; Cohen, Ana Carmen

doi:10.1016/j.rhisph.2021.100334

Cited by 19 publications

(7 citation statements)

References 35 publications

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“…Under in vitro conditions, it was found that seed bacterized with the PGPR (St-149D, Ft-G43, Hyd-13Z, Hyd-01F, and Gb-T23) enhanced seed germination and other growth indicators. Similar results were reported under in vitro and controlled conditions with strains of this bacteria genera in tomato plants [ 65 – 67 ] and other vegetable plants [ 68 , 69 ]. Seed germination depends on environmental conditions and the balance of abscisic acid/gibberellins ratio to promote dormancy-breaking.…”

Section: Discussionsupporting

confidence: 86%

Use of ginger extract and bacterial inoculants for the suppression of Alternaria solani causing early blight disease in Tomato

Hyder,

Gondal,

Sehar

et al. 2024

BMC Plant Biol

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Early blight (EB), caused by Alternaria solani, is a serious problem in tomato production. Plant growth-promoting rhizobacteria promote plant growth and inhibit plant disease. The present study explored the bio-efficacy of synergistic effect of rhizobacterial isolates and ginger powder extract (GPE) against tomato EB disease, singly and in combination. Six fungal isolates from symptomatic tomato plants were identified as A. solani on the basis of morphological features i.e., horizontal septation (6.96 to 7.93 µm), vertical septation (1.50 to 2.22 µm), conidia length (174.2 to 187.6 µm), conidial width (14.09 to 16.52 µm), beak length (93.06 to 102.26 µm), and sporulation. Five of the twenty-three bacterial isolates recovered from tomato rhizosphere soil were nonpathogenic to tomato seedlings and were compatible with each other and with GPE. Out of five isolates tested individually, three isolates (St-149D, Hyd-13Z, and Gb-T23) showed maximum inhibition (56.3%, 48.3%, and 42.0% respectively) against mycelial growth of A. solani. Among combinations, St-149D + GPE had the highest mycelial growth inhibition (76.9%) over the untreated control. Bacterial strains molecularly characterized as Pseudomonas putida, Bacillus subtilis, and Bacillus cereus and were further tested in pot trials through seed bacterization for disease control. Seeds treated with bacterial consortia + GPE had the highest disease suppression percentage (78.1%), followed by St-149D + GPE (72.2%) and Hyd-13Z + GPE (67.5%). Maximum seed germination was obtained in the bacterial consortia + GPE (95.0 ± 2.04) followed by St-149D + GPE (92.5 ± 1.44) and Hyd-13Z + GPE (90.0 ± 2.04) over control (73.8 ± 2.39) and chemical control as standard treatment (90.0 ± 2). Ginger powder extracts also induce the activation of defence-related enzymes (TPC, PO, PPO, PAL, and CAT) activity in tomato plants. These were highly significant in the testing bacterial inoculants against A. solani infection in tomato crops.

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Section: Discussionsupporting

confidence: 86%

Use of ginger extract and bacterial inoculants for the suppression of Alternaria solani causing early blight disease in Tomato

Hyder,

Gondal,

Sehar

et al. 2024

BMC Plant Biol

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“…The native PGPR inoculation in Arabidopsis plants under drought demonstrated their beneficial effects by increasing leaf area and plant weight levels (Figure 3). Similarly, previous work by our group reported the ability of 64S1 and 42P4 strains to promote plant growth in tomato and pepper plants and alleviate the negative symptoms of saline stress (Lobato Ureche et al, 2021;Pérez-Rodriguez et al, 2022;Pérez-Rodriguez, Piccoli, et al, 2020a). Moreover, PGPR such as P. fluorescens, Proteus mirabilis, and B. amyloliquefaciens, stimulated plant growth in tomato, maize, and Vitis labrusca under drought and salt stress (Jiao et al, 2016;Mekureyaw et al, 2022;Vishnupradeep et al, 2022).…”

Section: Effect Of Pgpr and Mt Treatment On Growth Parameters In Arab...supporting

confidence: 67%

“…These strains increase root and shoot dry weight, stem height, and plant diameter and reduce the negative effect of salt stress in inoculated plants (Pérez-Rodriguez et al, 2022). Pseudomonas 42P4 speeds up the germination process, improves the seed germination percentage and seed vigor, and modifies the phenolic compound profile of pepper (Capsicum annum L.) (Lobato Ureche et al, 2021). PGPR interact with plant roots, increasing plant yield by different mechanisms, which include the production of phytohormones, atmospheric nitrogen fixation and insoluble phosphate solubilization (Gupta et al, 2019;Vocciante et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Melatonin production by rhizobacteria native strains: Towards sustainable plant growth promotion strategies

Jofré

Mammana

Appiolaza

et al. 2023

Physiologia Plantarum

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In the current context of climate change and water deficit, the selection of native beneficial microorganisms, such as plant growth‐promoting rhizobacteria (PGPR), has become a trend for sustainable agriculture due to their ability to improve plant–bacteria interaction with a minimal adverse effect on the soil microbiota compared to commercial PGPR. Until now, the production of phytohormones like melatonin (MT) by native PGPR and their effect on endogenous MT levels in plants have been poorly studied. MT is a ubiquitous phytohormone that protects plants against biotic and abiotic stress by improving the tolerance of stressed plants. In this work, the production of MT by two native PGPR, Enterobacter 64S1 and Pseudomonas 42P4, was evaluated and both PGPR were applied in Arabidopsis thaliana plants grown under drought conditions to assess the inoculation effects. Parameters such as plant growth, leaf cellular membrane damage, leaf protective compounds, and endogenous MT levels under drought and irrigation conditions were evaluated. The results demonstrated that the native strains Pseudomonas 42P4 and Enterobacter 64S1 produce MT and increase the content of endogenous MT in A. thaliana plants under drought. These native strains improved the tolerance of arabidopsis plants to drought by preventing oxidative and membrane damages and improving plant growth. To the best of our knowledge, this is the first report on MT production by native PGPR and their effects on endogenous MT levels in arabidopsis plants, setting the bases to elucidate the role of native PGPR on water deficit conditions.

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“…In Mendoza province, Argentina, our research group isolated and characterized native PGPR strains from roots and the rhizosphere of a tomato crop (Pérez-Rodriguez et al, 2020). We showed that inoculation with these native strains was effective in promoting the germination percentage, the vigor index and modifying the profile of phenolic compounds, suggesting an elicitation of phenylpropanoid pathways related to induced systemic response (IRS) in pepper seeds (Lobato-Ureche et al, 2021). We also reported that these native PGPR promote the growth and development of tomato plants and reduce the negative effects of salt stress by NaCl in tomato plants cultivated in the greenhouse (Pérez-Rodriguez et al, 2020, 2022.…”

Section: Introductionmentioning

confidence: 99%

Pseudomonas 42P4 and Cellulosimicrobium 60I1 as a sustainable approach to increase growth, development, and productivity in pepper plants

Lobato-Ureche

Pérez-Rodriguez²,

Segura³

et al. 2023

Front. Sustain. Food Syst.

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The production of pepper plants for industrial use is not enough to satisfy the demand of consumers and agrochemicals are frequently used to increase production. In this study four native plant growth promoting rhizobacteria (PGPR) was tested as an alternative to select the most effective to enhance growth, development, and productivity of pepper plants. Seedlings were inoculated with Pseudomonas 42P4, Cellulosimicrobium 60I1, Ochrobactrum 53F, Enterobacter 64S1 and cultivated on pots in the greenhouse and the morphological, biochemical, and physiological parameters were determined. In addition, the phenolic compound profiles were evaluated. All four strains increased the different parameters evaluated but Pseudomonas 42P4 and Cellulosimicrobium 60I1 were the most effective strains, improving leaf and root dry weight, stem diameter, nitrogen level, stomatal conductance, chlorophyll quantum efficiency, chlorophyll SPAD index, total chlorophyll and carotenoid levels, number of flowers and fruits per plant, and the length, diameter and dry weight of the fruit. Also, these strains modified the phenolic compound profiles, and 18 compounds were quantified. Pseudomonas 42P4 inoculation modified the phenolic compound profile similarly to the Fertilized treatment and induced the synthesis of different endogenous compounds in the flavonoid family, also increasing catechin, naringin, naringenin, myricetin, procyanidin B1, epigallocatechin-gallate, cinnamic, and ferulic acids related to antioxidant activity and catechin, cinnamic, and ferulic acids related to the induced systemic response. Pseudomonas 42P4 can be used as a bioinoculant in pepper plants to enable better agronomic management, decreasing the use of chemical fertilizer to contribute to sustainable agriculture.

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Rhizobacteria improve the germination and modify the phenolic compound profile of pepper (Capsicum annum L.)

Cited by 19 publications

References 35 publications

Use of ginger extract and bacterial inoculants for the suppression of Alternaria solani causing early blight disease in Tomato

Use of ginger extract and bacterial inoculants for the suppression of Alternaria solani causing early blight disease in Tomato

Melatonin production by rhizobacteria native strains: Towards sustainable plant growth promotion strategies

Pseudomonas 42P4 and Cellulosimicrobium 60I1 as a sustainable approach to increase growth, development, and productivity in pepper plants

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