Rhizosphere biodiversity as a premise for application in bio-economy

Uzoh, Ifeyinwa Monica; Babalola, Olubukola Oluranti

doi:10.1016/j.agee.2018.07.003

Cited by 39 publications

(24 citation statements)

References 120 publications

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“…These exudates serve as sources of carbon and nutrients for the microbial metabolism of the microbes [63], attract them to the rhizosphere, and determine the nature of organisms that colonize the rhizosphere, in addition to the soil type and physicochemical properties of the soil, which also have an impact on the plant and the ability of microbes to survive. The interactions of plant roots with the soil and microorganisms makes the rhizosphere a niche for abundant microbial activities while sustaining the fertility of the soil [63][64][65][66][67]. Different genera of PGPR make use of different mechanisms to lessen the damage caused by environmental stresses on plants ( Figure 2).…”

Section: Drought Stress Mitigation In Plants: Utilization Of Plant Grmentioning

confidence: 99%

Plant Growth Promoting Rhizobacterial Mitigation of Drought Stress in Crop Plants: Implications for Sustainable Agriculture

2019

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Abiotic stresses arising from climate change negates crop growth and yield, leading to food insecurity. Drought causes oxidative stress on plants, arising from excessive production of reactive oxygen species (ROS) due to inadequate CO2, which disrupts the photosynthetic machinery of plants. The use of conventional methods for the development of drought-tolerant crops is time-consuming, and the full adoption of modern biotechnology for crop enhancement is still regarded with prudence. Plant growth-promoting rhizobacteria (PGPR) could be used as an inexpensive and environmentally friendly approach for enhancing crop growth under environmental stress. The various direct and indirect mechanisms used for plant growth enhancement by PGPR were discussed. Synthesis of 1-aminocyclopropane−1-carboxylate (ACC) deaminase enhances plant nutrient uptake by breaking down plant ACC, thereby preventing ethylene accumulation, and enable plants to tolerate water stress. The exopolysaccharides produced also improves the ability of the soil to withhold water. PGPR enhances osmolyte production, which is effective in reducing the detrimental effects of ROS. Multifaceted PGPRs are potential candidates for biofertilizer production to lessen the detrimental effects of drought stress on crops cultivated in arid regions. This review proffered ways of augmenting their efficacy as bio-inoculants under field conditions and highlighted future prospects for sustainable agricultural productivity.

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Section: Drought Stress Mitigation In Plants: Utilization Of Plant Grmentioning

confidence: 99%

Plant Growth Promoting Rhizobacterial Mitigation of Drought Stress in Crop Plants: Implications for Sustainable Agriculture

2019

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“…Thus, each PGPR-crop combination should be studied to maintain an adequate balance between the crop and both native and applied microorganisms. In this way, all microbial activities could be used effectively to make sustainable agriculture possible without affecting the environment and contribute to the novel paradigms of the new green revolution (Gewin, 2010) and bioeconomy (Uzoh & Babalola, 2016).…”

Section: Discussionmentioning

confidence: 99%

Impact of management of cover crop–soybean agroecosystems on rhizosphere microbial communities

Ortega

Vásquez²,

Alba³

et al. 2020

European J Soil Science

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Knowledge of the rhizosphere and use of quality microbial bioinputs are tools to achieve agricultural sustainability. The impact of management of cover crop–soybean agroecosystems on rhizosphere microbial communities was evaluated. A field experiment in a randomized complete block design with factorial arrangement in sub‐divided plots was performed. Effects of fertilization (0 and 45 kg·ha−1), oats, rye and control without cover crops, plant growth promoting rhizobacteria (PGPR) co‐inoculation of Azospirillum brasilense and Pseudomonas fluorescens, and three sampling times on microbial counts, community‐level physiological profiles (CLPP) and terminal restriction fragment length polymorphism (T‐RLFP) were studied. CLPP were drastically changed at three sampling times: before glyphosate, after glyphosate and at soybean harvest. Before glyphosate application, the interaction between PGPR inoculation and coverage treatments modified the functional and structural profiles of the rhizosphere microbial communities. Furthermore, the highest microbial counts and the greatest functional diversity indices were observed before glyphosate application but significantly decayed after glyphosate application and at soybean harvest, showing a permanent impact of glyphosate application on the rhizosphere microbial community functionality, which was confirmed with several statistical analyses. For the cover crop–soybean agroecosystems, we can conclude that the rhizosphere microbial communities showed high sensitivity to glyphosate. PGPR inoculation only increased the aerial biomass of rye at the jointing and grain‐filling stages. Inoculated plants without fertilization and non‐inoculated plants with fertilization showed similar aerial biomass production of this crop. This work demonstrates that different management decisions can change plant–microorganism relationships in the rhizospheres of cover crops and impact aboveground biomass production. A better understanding of microbial ecology will allow the sustainable use of available resources.Highlights A field experiment was conducted using oats and rye as cover crops in succession with soybean. Management decisions changed plant–microorganism relationships and impact on microbial ecology. Management of cover crops with glyphosate had negative impacts on rhizosphere microbial communities. Co‐inoculation with Azospirillum brasilense and Pseudomonas fluorescens increased the aerial biomass production of rye.

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“…BE is the diversion of dependence on fossil fuels to a situation in which the use of biomass occurs, not only as a food supply but also as raw material for industry and energy production, including the supply of biodiesel. The main debate surrounding the BE concerns its sustainability [8,10,21]. Bioeconomic is a conceptually abundant border terminology for a green and low-carbon or carbon-free economy.…”

Section: What Is the Bioeconomy?mentioning

confidence: 99%

“…The requirement to eliminate dependence on fossil fuels poses a challenge to developing the bio-based economy. In this economic system, agriculture will provide quality food to the growing world population and raw materials for industries and energy [21].…”

Section: What Is the Bioeconomy?mentioning

confidence: 99%

“…The data presented in Table 1 shown the relevant aspects for the development of BE, which are the following: implementing life cycle perspectives for the certification and improvement of the sustainability of BE products throughout the supply chain [27]; promoting the involvement of citizens and final buyers to reduce the gap between science and society, with more research networks, education, training, and clusters of agricultural cooperatives [9,11,28]; using water, energy, and land resources sustainably [10,21,29]; improving productivity and land use through better crop management [10,21]; generating opportunities to separate agricultural growth from environmental degradation through more sustainable production methods using biotechnology [10]; utilizing biomass more efficiently [10,21]; achieving social well-being [22]; employing clean technologies to decrease greenhouse gas emissions, minimizing the inputs, and maximizing the outputs of the system [7]. To facilitate achieving these objectives, indicators and targets may be derived and developed to provide direction for the sustainable development of the BE [27].…”

Section: Identification Of Key Aspects For the Development Of Bioeconomymentioning

confidence: 99%

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Benefits of Organic Agriculture under the Perspective of the Bioeconomy: A Systematic Review

2021

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The opportunities for the global growth of the bioeconomy (BE) are generated by the need to expand the food supply for an increasing world population without compromising the environment even further. Organic agriculture (OA) claims to be more environmentally friendly than conventional agriculture and capable of addressing sustainable development objectives by using green technologies, resulting in economic, social, and ecological benefits. The aim of this paper is to investigate the relation between OA and BE through a systematic literature review. We addressed the benefits of OA under perspective of the main aspects of BE. As demonstrated by previous papers assessed on this review, OA can be a means to facilitate strategies for the use of renewable resources to mitigate the emergencies arising from global warming, as claimed by the BE concept. This article introduces a necessary discussion due the lack of previous studies reporting the capacity of OA to connect with the BE. As a final contribution, we present a conceptual framework characterizing potential benefits of OA under the perspective of BE, for organic farmers and researchers to advance in sustainability and green innovation.

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Rhizosphere biodiversity as a premise for application in bio-economy

Cited by 39 publications

References 120 publications

Plant Growth Promoting Rhizobacterial Mitigation of Drought Stress in Crop Plants: Implications for Sustainable Agriculture

Plant Growth Promoting Rhizobacterial Mitigation of Drought Stress in Crop Plants: Implications for Sustainable Agriculture

Impact of management of cover crop–soybean agroecosystems on rhizosphere microbial communities

Benefits of Organic Agriculture under the Perspective of the Bioeconomy: A Systematic Review

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