Soil microbial inoculants for sustainable agriculture: Limitations and opportunities

O’Callaghan, Maureen; Ballard, Ross; Wright, David

doi:10.1111/sum.12811

Cited by 156 publications

(94 citation statements)

References 256 publications

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“…Azospirillum and Azotobacter are free-living nitrogen-fixing bacteria that have been frequently used in inoculant products. In particular, Azospirillum , which is among the most-studied genera of PGPB in the world, has been used (particularly A. brasiliense ) as a base for more than 100 biostimulant products in South America alone [ 93 ], most of which, but not all, are registered for use in wheat and maize [ 94 ]. The beneficial effects exerted by the bacteria of this genus on plant growth depend not only on nitrogen fixation and phosphate solubilization, but also on the synthesis of phytohormones, plant regulators (among which are a variety of molecules with low molecular weight) and enzymes that enhance membrane activity and proliferation of the root system, thus improving the uptake of water and ions and reducing the effects of abiotic stress and pathogen infections (ISR response).…”

Section: Plant Growth-promoting Bacteria (Pgpb)mentioning

confidence: 99%

The Effects of the Microbial Biostimulants Approved by EU Regulation 2019/1009 on Yield and Quality of Vegetable Crops

Fusco

Nicastro

Rouphael

et al. 2022

Foods

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The use of microbial biostimulants such as plant growth-promoting rhizobacteria (PGPB) and arbuscular mycorrhizal fungi (AMF) has gained popularity in recent years as a sustainable approach to boost yield as well as the quality of produce. The beneficial effects of microbial biostimulants have been reported numerous times. However, information is missing concerning quantitative assessment of the overall impact of microbial biostimulants on the yield and quality of vegetable crops. Here we provide for the first time a comprehensive, semi-systematic review of the effects of microbial biostimulants allowed by Regulation (EU) 2019/1009, including microorganisms belonging to the AMF (phylum Glomeromycota), or to Azospirillum, Azotobacter and Rhizobium genera, on vegetable crops’ quality and yield, with rigorous inclusion and exclusion criteria based on the PRISMA method. We identified, selected and critically evaluated all the relevant research studies from 2010 onward in order to provide a critical appraisal of the most recent findings related to these EU-allowed microbial biostimulants and their effects on vegetable crops’ quality and yield. Moreover, we highlighted which vegetable crops received more beneficial effects from specific microbial biostimulants and the protocols employed for plant inoculation. Our study is intended to draw more attention from the scientific community to this important instrument to produce nutrient-dense vegetables in a sustainable manner. Finally, our semi-systematic review provides important microbial biostimulant application guidelines and gives extension specialists and vegetable growers insights into achieving an additional benefit from microbial biostimulant application.

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Section: Plant Growth-promoting Bacteria (Pgpb)mentioning

confidence: 99%

The Effects of the Microbial Biostimulants Approved by EU Regulation 2019/1009 on Yield and Quality of Vegetable Crops

Fusco

Nicastro

Rouphael

et al. 2022

Foods

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“…Pseudomonas fluorescens has also been used to produce commercial inoculants under the trade names Conquer and Victus ( Suyal et al, 2016 ). Moreover, some inoculant products currently on the market contain several different microorganisms ( O’Callaghan et al, 2020 ). Wang et al (2020) noted that the combination of Enterobacter sp.…”

Section: Application and Commercialization Of Pgpb In Phytoremediatio...mentioning

confidence: 99%

Plant growth-promoting bacteria in metal-contaminated soil: Current perspectives on remediation mechanisms

et al. 2022

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Heavy metal contamination in soils endangers humans and the biosphere by reducing agricultural yield and negatively impacting ecosystem health. In recent decades, this issue has been addressed and partially remedied through the use of “green technology,” which employs metal-tolerant plants to clean up polluted soils. Furthermore, the global climate change enhances the negative effects of climatic stressors (particularly drought, salinity, and extreme temperatures), thus reducing the growth and metal accumulation capacity of remediating plants. Plant growth-promoting bacteria (PGPB) have been widely introduced into plants to improve agricultural productivity or the efficiency of phytoremediation of metal-contaminated soils via various mechanisms, including nitrogen fixation, phosphate solubilization, phytohormone production, and biological control. The use of metal-tolerant plants, as well as PGPB inoculants, should hasten the process of moving this technology from the laboratory to the field. Hence, it is critical to understand how PGPB ameliorate environmental stress and metal toxicity while also inducing plant tolerance, as well as the mechanisms involved in such actions. This review attempts to compile the scientific evidence on this topic, with a special emphasis on the mechanism of PGPB involved in the metal bioremediation process [plant growth promotion and metal detoxification/(im)mobilization/bioaccumulation/transformation/translocation] and deciphering combined stress (metal and climatic stresses) tolerance.

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“…Biosensor systems that could continuously monitor the environment will be an important task in the coming years. Depending on the environment, monitoring may involve various parameters which are presented in Figure 13 [ 11 , 157 , 158 , 159 , 160 , 161 , 162 ].…”

Section: Perspectivesmentioning

confidence: 99%

Biopolymer Composites with Sensors for Environmental and Medical Applications

et al. 2022

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One of the biggest economic and environmental sustainability problems is the over-reliance on petroleum chemicals in polymer production. This paper presents an overview of the current state of knowledge on biopolymers combined with biosensors in terms of properties, compounding methods and applications, with a focus on medical and environmental aspects. Therefore, this article is devoted to environmentally friendly polymer materials. The paper presents an overview of the current state of knowledge on biopolymers combined with biosensors in terms of properties, compounding methods and applications, with a special focus on medical and environmental aspects. The paper presents the current state of knowledge, as well as prospects. The article shows that biopolymers made from renewable raw materials are of great interest in various fields of science and industry. These materials not only replace existing polymers in many applications, but also provide new combinations of properties for new applications. Composite materials based on biopolymers are considered superior to traditional non-biodegradable materials due to their ability to degrade when exposed to environmental factors. The paper highlights the combination of polymers with nanomaterials which allows the preparation of chemical sensors, thus enabling their use in environmental or medical applications due to their biocompatibility and sensitivity. This review focuses on analyzing the state of research in the field of biopolymer-sensor composites.

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Soil microbial inoculants for sustainable agriculture: Limitations and opportunities

Cited by 156 publications

References 256 publications

The Effects of the Microbial Biostimulants Approved by EU Regulation 2019/1009 on Yield and Quality of Vegetable Crops

The Effects of the Microbial Biostimulants Approved by EU Regulation 2019/1009 on Yield and Quality of Vegetable Crops

Plant growth-promoting bacteria in metal-contaminated soil: Current perspectives on remediation mechanisms

Biopolymer Composites with Sensors for Environmental and Medical Applications

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