scholarly journals Allium cepa L. Inoculation with a Consortium of Plant Growth-Promoting Bacteria: Effects on Plants, Soil, and the Autochthonous Microbial Community

2021 ◽  
Vol 9 (3) ◽  
pp. 639
Author(s):  
Marika Pellegrini ◽  
Daniela M. Spera ◽  
Claudia Ercole ◽  
Maddalena Del Gallo
Keyword(s):  
Microbial Community ◽  
Plant Growth ◽  
Allium Cepa ◽  
Bacterial Consortium ◽  
Total Phenolic ◽  
Plant Growth Promoting Bacteria ◽  
Allium Cepa L ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Molecular Profiles

The present work was aimed at investigating the effects of a four bacterial strain consortium—Azospirillum brasilense, Gluconacetobacter diazotrophicus, Herbaspirillum seropedicae, and Burkholderia ambifaria—on Allium cepa L. and on soil health. The bacterial consortium was inoculated on seeds of two different onion varieties; inoculated and Control seeds (treated with autoclaved inoculum) were sown in an open-field and followed until harvest. Plant growth development parameters, as well as soil physico–chemical and molecular profiles (DNA extraction and 16S community sequencing on the Mi-Seq Illumina platform), were investigated. The results showed a positive influence of bacterial application on plant growth, with increased plant height (+18%), total chlorophylls (+42%), crop yields (+13%), and bulb dry matter (+3%) with respect to the Control. The differences between Control and treatments were also underlined in the bulb extracts in terms of total phenolic contents (+25%) and antioxidant activities (+20%). Soil fertility and microbial community structure and diversity were also positively affected by the bacterial inoculum. At harvest, the soil with the presence of the bacterial consortium showed an increase in total organic carbon, organic matter, and available phosphorus, as well as higher concentrations of nutrients than the Control. The ecological indexes calculated from the molecular profiles showed that community diversity was positively affected by the bacterial treatment. The present work showed the effective use of plant growth-promoting bacteria as a valid fertilization strategy to improve yield in productive landscapes whilst safeguarding soil biodiversity.

scholarly journals Allium cepa L. Inoculation with a Consortium of Plant Growth-Promoting Bacteria: Effects on Plant Growth and Development and Soil Fertility Status and Microbial Community

Proceedings ◽  
2021 ◽  
Vol 66 (1) ◽  
pp. 20
Author(s):  
Marika Pellegrini ◽  
Daniela M. Spera ◽  
Claudia Ercole ◽  
Maddalena del Gallo
Keyword(s):  
Microbial Community ◽  
Plant Growth ◽  
Soil Fertility ◽  
Allium Cepa ◽  
Bacterial Consortium ◽  
Plant Growth Promoting Bacteria ◽  
Allium Cepa L ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Molecular Profiles

The present work was aimed at investigating the effects of a four strains consortium—Azospirillum brasilense, Gluconacetobacter diazotrophicus, Herbaspirillum seropedicae, and Burkholderia ambifaria—on crops of Allium cepa L. and its soil health. The bacterial consortium was inoculated on seeds of two different onion varieties; inoculated seeds and control ones (treated with autoclaved inoculum) were sown in open-field and followed until harvest. Plant growth development parameters, as well as soil physico-chemical and molecular profiles (DNA extraction and 16S community sequencing on the Mi-Seq Illumina platform), were investigated. The results showed a positive influence of bacterial application on plant growth, with increased plant height (+18%), total chlorophylls (+42%), crop yields (+13%), and bulbs dry matter (+3%) than the control. The differences between control and treated experimental conditions were also underlined in the bulb extracts in terms of total phenolic contents (+25%) and antioxidant activities (+20%). Soil fertility and microbial community structure and diversity were also positively affected by the bacterial inoculum. At harvest, the soil with the presence of the bacterial consortium showed an increase of total organic carbon, organic matter, and available P and higher concentrations of nutrients than control. The ecological indexes calculated on the molecular profiles showed that community diversity was positively affected by the bacterial treatment. The present work allowed to remark the effective use of plant growth-promoting bacteria as a valid fertilization strategy to improve yield in productive landscapes, whilst safeguarding soil biodiversity.

Isolasi dan Karakterisasi Bakteri Endofit Pelarut Fosfat dan Penghasil Hidrogen Cyanide (HCN) dari Tanaman Bawang Merah (Allium cepa L).

2018 ◽  
Vol 20 (1) ◽  
pp. 9
Author(s):  
Ryan Hilda Wandita ◽  
Sri Pujiyanto ◽  
Agung Suprihadi ◽  
Ratih Dewi Hastuti
Keyword(s):  
Plant Growth ◽  
Traditional Medicine ◽  
Allium Cepa ◽  
Endophytic Bacteria ◽  
Economic Value ◽  
Average Diameter ◽  
Plant Growth Promoting Bacteria ◽  
Allium Cepa L ◽  
Plant Growth Promoting ◽  
Growth Promoting

Onions (Allium cepa L.) is one of the leading horticultural commodities in Indonesia and is often used as seasoning and traditional medicine. Onion has a high economic value and fluctuating prices so that domestic onion production needs to be improved, one of them with a presence of endophytic bacteria that act as plant growth promoting agent or Plant Growth Promoting Bacteria (PGPB). Endophytic bacteria isolated from the root, leaves, and bulbs. In this research has been tested endophytic bacteria of onion plants from Garut regency which has PGPB factors such as able to dissolve phosphate, and produce HCN. The results obtained 251 isolates of endophytic bacteria. Based on the characterization results, the superior isolates capable of dissolving phosphate with an average diameter of 0.45 cm is isolate II.B.1D.3, and 11 isolates capable of producing high HCN. These isolates can be used as PGPB agents so that they can be useful in increasing plant growth and onion production and biocontrol in suppressing pathogens. Keywords: PGPB, endophyte, onion, phosphate, HCN

scholarly journals Effect of Pyroligneous Acid on the Microbial Community Composition and Plant Growth-Promoting Bacteria (PGPB) in Soils

Soil Systems ◽  
2022 ◽  
Vol 6 (1) ◽  
pp. 10
Author(s):  
Anithadevi Kenday Sivaram ◽  
Logeshwaran Panneerselvan ◽  
Kannappar Mukunthan ◽  
Mallavarapu Megharaj
Keyword(s):  
Microbial Community ◽  
Plant Growth ◽  
Microbial Diversity ◽  
Growth And Yield ◽  
Rrna Gene ◽  
Plant Growth Promoting Bacteria ◽  
Microbial Composition ◽  
Pyroligneous Acid ◽  
Plant Growth Promoting ◽  
Growth Promoting

Pyroligneous acid (PA) is often used in agriculture as a plant growth and yield enhancer. However, the influence of PA application on soil microorganisms is not often studied. Therefore, in this study, we investigated the effect of PA (0.01–5% w/w in soil) on the microbial diversity in two different soils. At the end of eight weeks of incubation, soil microbial community dynamics were determined by Illumina-MiSeq sequencing of 16S rRNA gene amplicons. The microbial composition differed between the lower (0.01% and 0.1%) and the higher (1% and 5%) concentration in both PA spiked soils. The lower concentration of PA resulted in higher microbial diversity and dehydrogenase activity (DHA) compared to the un-spiked control and the soil spiked with high PA concentrations. Interestingly, PA-induced plant growth-promoting bacterial (PGPB) genera include Bradyrhizobium, Azospirillum, Pseudomonas, Mesorhizobium, Rhizobium, Herbaspiriluum, Acetobacter, Beijerinckia, and Nitrosomonas at lower concentrations. Additionally, the PICRUSt functional analysis revealed the predominance of metabolism as the functional module’s primary component in both soils spiked with 0.01% and 0.1% PA. Overall, the results elucidated that PA application in soil at lower concentrations promoted soil DHA and microbial enrichment, particularly the PGPB genera, and thus have great implications for improving soil health.

scholarly journals Screening and Assessment of Potential Plant Growth-promoting Bacteria Associated with Allium cepa Linn.

2020 ◽  
Vol 35 (2) ◽  
pp. n/a
Author(s):  
Brian Estuardo Samayoa ◽  
Fo-Ting Shen ◽  
Wei-An Lai ◽  
Wen-Ching Chen
Keyword(s):  
Plant Growth ◽  
Allium Cepa ◽  
Plant Growth Promoting Bacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting
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