The impact of plant growth promoting bacteria (PGPB) on the development of phytopathogenic fungi

The main purpose of this study was to evaluate impact of plant growth promoting bacteria (PGPB) on the development of phytopathogenic fungi and correlate it with a potential effects on the growth of plants under unfavorable conditions, in order to improve the efficiency of a phytoremediation process. The conducted research focused on the antifungal properties of PGPB. In this study, 51 isolates of bacteria were obtained after diversified disinfection time from plants growing on soil after sewage sludge amendment. The results revealed that some isolated bacteria, mainly endophytic ones, inhibited the development of Fusarium oxysporum, F. culmorum and Alternaria alternata.

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Plant growth promoting bacteria with potential biocontrol agent of Fusarium oxysporum f. sp. Lycopersici , and Moniliophthora roreri

Scientia Agropecuaria ◽

10.17268/sci.agropecu.2019.03.10 ◽

2019 ◽

Vol 10 (3) ◽

pp. 393-402

Author(s):

Jefferson Guato-Molina ◽

Javier Auhing-Arcos ◽

Jorge Crespo-Ávila ◽

Gabriel Esmeraldas-García ◽

Antonio Mendoza-León ◽

...

Keyword(s):

Plant Growth ◽

Fusarium Oxysporum ◽

Biocontrol Agent ◽

Plant Growth Promoting Bacteria ◽

Potential Biocontrol Agent ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Moniliophthora Roreri

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The Contrivance of Plant Growth Promoting Microbes to Mitigate Climate Change Impact in Agriculture

Microorganisms ◽

10.3390/microorganisms9091841 ◽

2021 ◽

Vol 9 (9) ◽

pp. 1841

Author(s):

Angelika Fiodor ◽

Surender Singh ◽

Kumar Pranaw

Keyword(s):

Climate Change ◽

Plant Growth ◽

Global Climate ◽

Acc Deaminase ◽

Crop Productivity ◽

Plant Growth Promoting Bacteria ◽

Hormone Synthesis ◽

Plant Growth Promoting ◽

Growth Promoting ◽

The Impact

Combating the consequences of climate change is extremely important and critical in the context of feeding the world’s population. Crop simulation models have been extensively studied recently to investigate the impact of climate change on agricultural productivity and food security. Drought and salinity are major environmental stresses that cause changes in the physiological, biochemical, and molecular processes in plants, resulting in significant crop productivity losses. Excessive use of chemicals has become a severe threat to human health and the environment. The use of beneficial microorganisms is an environmentally friendly method of increasing crop yield under environmental stress conditions. These microbes enhance plant growth through various mechanisms such as production of hormones, ACC deaminase, VOCs and EPS, and modulate hormone synthesis and other metabolites in plants. This review aims to decipher the effect of plant growth promoting bacteria (PGPB) on plant health under abiotic soil stresses associated with global climate change (viz., drought and salinity). The application of stress-resistant PGPB may not only help in the combating the effects of abiotic stressors, but also lead to mitigation of climate change. More thorough molecular level studies are needed in the future to assess their cumulative influence on plant development.

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Fusarium Oxysporum f. sp. Cannabis Isolated from Cannabis Sativa L.: In Vitro and in Planta Biocontrol by a Plant Growth Promoting-Bacteria Consortium

Plants ◽

10.3390/plants10112436 ◽

2021 ◽

Vol 10 (11) ◽

pp. 2436

Author(s):

Marika Pellegrini ◽

Claudia Ercole ◽

Carmelo Gianchino ◽

Matteo Bernardi ◽

Loretta Pace ◽

...

Keyword(s):

Plant Growth ◽

Fusarium Oxysporum ◽

Cannabis Sativa ◽

Antagonistic Activity ◽

Plant Growth Promoting Bacteria ◽

Dual Culture ◽

In Planta ◽

Plant Growth Promoting ◽

Growth Promoting

Industrial hemp (Cannabis sativa L.) is a multipurpose plant used in several fields. Several phytopathogens attack hemp crops. Fusarium oxysporum is a common fungal pathogen that causes wilt disease in nurseries and in field cultivation and causes high losses. In the present study, a pathogenic strain belonging to F. oxysporum f. sp. cannabis was isolated from a plant showing Fusarium wilt. After isolation, identification was conducted based on morphological and molecular characterizations and pathogenicity tests. Selected plant growth-promoting bacteria with interesting biocontrol properties—Azospirillum brasilense, Gluconacetobacter diazotrophicus, Herbaspirillum seropedicae and Burkholderia ambifaria—were tested against this pathogen. In vitro antagonistic activity was determined by the dual culture method. Effective strains (in vitro inhibition > of 50%) G. diazotrophicus, H. seropedicae and B. ambifaria were combined in a consortium and screened for in planta antagonistic activity in pre-emergence (before germination) and post-emergence (after germination). The consortium counteracted Fusarium infection both in pre-emergence and post-emergence. Our preliminary results show that the selected consortium could be further investigated as an effective biocontrol agent for the management of this pathogen.

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Synthesis of Biogenic silver nanoparticles using plant growth-promoting bacteria: Potential use as biocontrol agent against phytopathogens

Biomaterials and Polymers Horizon ◽

10.37819/bph.001.01.0130 ◽

2021 ◽

Vol 1 (1) ◽

pp. 22-31

Author(s):

Divya Mittal ◽

Arun Kumar ◽

Bhuvaneshwari Balasubramaniam ◽

Rahul Thakur ◽

Samarjeet Singh Siwal ◽

...

Keyword(s):

Plant Growth ◽

Burkholderia Cepacia ◽

Phytopathogenic Fungi ◽

Plant Growth Promoting Bacteria ◽

Vis Spectroscopy ◽

Silver Nps ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Potential Use

Biogenic nanoparticles (NPs) derived from microbes present an excellent opportunity to deal with various challenges in medicine, diagnosis, environment and agriculture. In the area of agriculture sciences, researchers are facing challenges related to excessive utilization of pesticides which can be answered by utilizing plant growth-promoting (PGP) microbes. Herein, we have employed the culture filtrate of two PBP bacteria strains, Serratia marcescens and Burkholderia cepacia to prepare biogenic silver NPs. The biogenic silver NPs were characterized by various techniques viz. UV-VIS spectroscopy, SEM, XRD and FTIR. The biogenic AgNPs were able to control the growth of phytopathogenic fungi Aspergillus niger, A. fumigatus, Fusarium oxysporum, Pythium sp., and Rosellinia sp. by more than 80% as examined by in vitro growth reduction on agar medium. Very significantly, the growth inhibition of seedlings by phytopathogenic fungi was efficiently rescued using biogenic AgNPs derived from PGP bacteria. These results indicate the potential use of biogenic NPs to reduce the burden of chemical-based pesticides.

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Characterisation of bacterial diversity in fresh and aged sewage sludge biosolids using next generation sequencing.

Detritus ◽

10.31025/2611-4135/2020.13914 ◽

2020 ◽

pp. 82-91

Author(s):

Karen Ruth Little ◽

Han Ming Gan ◽

Aravind Surapaneni ◽

Jonathan Schmidt ◽

Antonio Frank Patti

Keyword(s):

Sewage Sludge ◽

Plant Growth ◽

Wastewater Treatment Plants ◽

Fold Increase ◽

Land Application ◽

Plant Growth Promoting Bacteria ◽

Potential Source ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Generation Sequencing

Sewage sludge, often referred to as biosolids, is generated in large quantities by wastewater treatment plants. It contains macro- and micronutrients which are essential for plant growth and so represents a valuable agricultural resource. Prior to land application, pathogens are carefully monitored to reduce the risk of crop and soil contamination however to date there has been limited investigation of agriculturally beneficial bacteria indigenous to the biosolids. This study investigated shifts in the composition of the bacterial community alongside the physicochemical properties of biosolids of increasing age, from freshly dewatered to those stockpiled for approximately four years. With stockpiling, there was a significant increase in ammonium content, ranging from 801 mg/kg in the fresh biosolids to 8178 mg/kg in the stockpiled biosolids and a corresponding increase in pH ranging from 6.93 to 8.21. We detected a ten-fold increase in Firmicutes, from 4% relative abundance in the fresh biosolids compared to 40% in the older, stockpiled biosolids. Plant growth promoting bacteria (PGPB) of the Proteobacteria family, particularly of the Devosia and Bradyrhizobium genera were identified in the freshly dewatered and the older, stockpiled biosolids. Land application of the biosolids studied here could reduce fertiliser costs, provide a means of pH correction to acidic soils and a potential source of bacteria beneficial for crop growth.

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Isolation and identification of plant growth-promoting bacteria associated with tall fescue

Proceedings of the New Zealand Grassland Association ◽

10.33584/jnzg.2009.71.2751 ◽

2009 ◽

pp. 211-216 ◽

Cited By ~ 5

Author(s):

J. Monk ◽

E. Gerard ◽

S. Young ◽

K. Widdup ◽

M. O'Callaghan

Keyword(s):

New Zealand ◽

Plant Growth ◽

Tall Fescue ◽

Festuca Arundinacea ◽

Plant Growth Promoting Bacteria ◽

Beneficial Bacteria ◽

Isolation And Identification ◽

Naturally Occurring ◽

Plant Growth Promoting ◽

Growth Promoting

Tall fescue (Festuca arundinacea) is a useful alternative to ryegrass in New Zealand pasture but it is slow to establish. Naturally occurring beneficial bacteria in the rhizosphere can improve plant growth and health through a variety of direct and indirect mechanisms. Keywords: rhizosphere, endorhiza, auxin, siderophore, P-solubilisation

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