Plant Growth-Promoting Rhizobacteria: Context, Mechanisms of Action, and Roadmap to Commercialization of Biostimulants for Sustainable Agriculture

Frontiers in Plant Science, Год журнала: 2018, Номер 9

Опубликована: Окт. 23, 2018

Microbes of the phytomicrobiome are associated with every plant tissue and, in combination form holobiont. Plants regulate composition and activity their bacterial community carefully. These microbes provide a wide range services benefits to plant; return, provides microbial reduced carbon other metabolites. Soils generally moist environment, rich which supports extensive soil communities. The rhizomicrobiome is great importance agriculture owing diversity root exudates cell debris that attract diverse unique patterns colonization. play key roles nutrient acquisition assimilation, improved texture, secreting modulating extracellular molecules such as hormones, secondary metabolites, antibiotics various signal compounds, all leading enhancement growth. compounds they secrete constitute valuable biostimulants pivotal stress responses. Research has demonstrated inoculating plants plant-growth promoting rhizobacteria (PGPR) or treating microbe-to-plant can be an effective strategy stimulate crop Furthermore, these strategies improve tolerance for abiotic stresses (egs. drought, heat, salinity) likely become more frequent climate change conditions continue develop. This discovery resulted multifunctional PGPR-based formulations commercial agriculture, minimize use synthetic fertilizers agrochemicals. review update about role PGPR from collection commercialization low-cost agricultural inputs. First, we introduce concept context underlying food security 21st century. Next, mechanisms growth promotion by discussed, including exchange between roots how relationships modulate responses via induced systemic resistance. On application side, discussed rhizosphere colonization inoculants. final sections paper describe applications century roadmap technology.

Язык: Английский

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A review on the plant microbiome: Ecology, functions, and emerging trends in microbial application

Journal of Advanced Research, Год журнала: 2019, Номер 19, С. 29 - 37

Опубликована: Март 20, 2019

Plants have evolved with a plethora of microorganisms having important roles for plant growth and health. A considerable amount information is now available on the structure dynamics microbiota as well functional capacities isolated community members. Due to interesting potential due current challenges in crop production there an urgent need bring microbial innovations into practice. Different approaches microbiome improvement exist. On one hand strains or strain combinations can be applied, however, field success often variable urgently required. Smart, knowledge-driven selection needed use suitable delivery formulations. other hand, farming practices genotype influence thus functioning. Therefore, appropriate breeding leading improved plant-microbiome interactions are avenues increase benefit microbiota. In conclusion, different making new generation inoculants application microbiome-based agro-management lines could lead better microbiome. This paper reviews importance functionalities bacterial discusses concepts regard plant-associated bacteria.

Язык: Английский

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Biological control using invertebrates and microorganisms: plenty of new opportunities

BioControl, Год журнала: 2017, Номер 63(1), С. 39 - 59

Опубликована: Март 18, 2017

In augmentative biological control (ABC), invertebrate and microbial organisms are seasonally released in large numbers to reduce pests. Today it is applied on more than 30 million ha worldwide. Europe the largest commercial market for agents, while North America has sales of microbials. A strong growth use ABC, particularly taking place Latin America, followed by Asia. The current popularity ABC due (1) its inherent positive characteristics (healthier farm workers persons living farming communities, no harvesting interval or waiting period after release sustainable as there development resistance against arthropod natural enemies, phytotoxic damage plants, better yields a healthier product, reduced pesticide residues [well below legal Maximum Residue Levels (MRLs)], (2) professionalism industry (inexpensive scale mass production, proper quality control, efficient packaging, distribution methods, availability many (>440 species) agents numerous pests), (3) number recent successes showing how can save agricultural production when pesticides fail not available, (4) several non-governmental organizations (NGOs), consumers, retailers demanding far MRLs, (5) policy developments regions world aimed at reduction replacement synthetic methods pest management. We convinced, however, that be much larger area today. plead short term pragmatic form agriculture adaptable, non-dogmatic combines sustainability gain from all types management methods. then propose move "conscious agriculture", which involves participation stakeholders consumer chain, respects environment resource future generations. Were agriculture" considered serious alternative conventional farming, would face an even brighter future.

Язык: Английский

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Plant Growth Promoting Rhizobacteria (PGPR) as Green Bioinoculants: Recent Developments, Constraints, and Prospects

Sustainability, Год журнала: 2021, Номер 13(3), С. 1140 - 1140

Опубликована: Янв. 22, 2021

The quest for enhancing agricultural yields due to increased pressure on food production has inevitably led the indiscriminate use of chemical fertilizers and other agrochemicals. Biofertilizers are emerging as a suitable alternative counteract adverse environmental impacts exerted by synthetic facilitate overall growth yield crops in an eco-friendly manner. They contain living or dormant microbes, which applied soil used treating crop seeds. One foremost candidates this respect is rhizobacteria. Plant promoting rhizobacteria (PGPR) important cluster beneficial, root-colonizing bacteria thriving plant rhizosphere bulk soil. exhibit synergistic antagonistic interactions with microbiota engage array activities ecological significance. promote facilitating biotic abiotic stress tolerance support nutrition host plants. Due their active endorsing activities, PGPRs considered hazardous fertilizers. biofertilizers biological approach toward sustainable intensification agriculture. However, application increasing several pros cons. Application potential that perform well laboratory greenhouse conditions often fails deliver expected effects development field settings. Here we review different types PGPR-based biofertilizers, discuss challenges faced widespread adoption deliberate prospects using

Язык: Английский

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Understanding and exploiting plant beneficial microbes

Current Opinion in Plant Biology, Год журнала: 2017, Номер 38, С. 155 - 163

Опубликована: Июнь 14, 2017

After a century of incremental research, technological advances, coupled with need for sustainable crop yield increases, have reinvigorated the study beneficial plant-microbe interactions attention focused on how microbiomes alter plant phenotypes. We review recent advances in microbiome and describe potential applications increasing productivity. The phylogenetic diversity is increasingly well characterized, their functional becoming more accessible. Large culture collections are available controlled experimentation, to come. Genetic resources being brought bear questions function. expect that microbial amendments varying complexities will expose rules governing contributing growth promotion disease resistance, enabling agriculture.

Язык: Английский

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Soil microbiota as game-changers in restoration of degraded lands

Science, Год журнала: 2022, Номер 375(6584)

Опубликована: Март 3, 2022

Land degradation reduces soil functioning and, consequently, the services that provides. Soil hydrological functions are critical to combat and promote restoration. microorganisms affect hydrology, but role of microbiota in forming sustaining is not well explored. Case studies indicate potential as game-changers restoring functions. We review state art microorganism use land restoration technology, groups with greatest for restoration, knowledge effect on physical properties, proposed strategies long-term degraded lands. also emphasize need advance emerging research field biophysical landscape interactions support soil-plant ecosystem practices.

Язык: Английский

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Compositional shifts in root-associated bacterial and archaeal microbiota track the plant life cycle in field-grown rice

PLoS Biology, Год журнала: 2018, Номер 16(2), С. e2003862 - e2003862

Опубликована: Фев. 23, 2018

Bacterial communities associated with roots impact the health and nutrition of host plant. The dynamics these microbial assemblies over plant life cycle are, however, not well understood. Here, we use dense temporal sampling 1,510 samples from root spatial compartments to characterize bacterial archaeal components root-associated microbiota field grown rice (Oryza sativa) course 3 consecutive growing seasons, as 2 sites in diverse geographic regions. was found be highly dynamic during vegetative phase growth then stabilized compositionally for remainder cycle. taxa conserved between were defined predictive features age by modeling using a random forest approach. age-prediction models revealed that drought-stressed plants have developmentally immature compared unstressed plants. Further, genotypes varying developmental rates, show shifts microbiome are correlated rates transitions rather than alone, such different compositions reflect juvenile adult stages. These results suggest model successional

Язык: Английский

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Seed Coating: A Tool for Delivering Beneficial Microbes to Agricultural Crops

Frontiers in Plant Science, Год журнала: 2019, Номер 10

Опубликована: Ноя. 6, 2019

Plant beneficial microbes (PBM), such as plant growth promoting bacteria (PGPB), rhizobia, arbuscular mycorrhizal (AM) fungi and Trichoderma can reduce the use of agrochemicals, increase yield, nutrition tolerance to biotic-abiotic stresses. Yet, large-scale applications PBM have been hampered by high amounts inoculum per or cultivation area needed for successful colonization consequently economic feasibility. Seed coating, a process that consists in covering seeds with low exogenous materials is gaining attention an efficient delivery system PBM. Microbial seed coating comprises binder, some cases filler, mixed inocula, be done using simple mixing-equipment (e.g. cement-mixer) more specialized/sophisticated apparatus fluidized bed). Binders/fillers used extend microbial survival. The most reported types are dressing, film pelleting. Tested than 50 species different dimensions, forms, textures germination cereals, vegetables, fruits, pulses other legumes), has studied various PGPB, lesser extent AM fungi. Most studies regarding applied via aimed at crop growth, yield protection against pathogens. Studies shown assist crops improving seedling establishment achieving yields food quality, under reduced chemical fertilization. right combination biological control agents (BCA) powerful tool wide number diseases Less frequently, report being adaptation abiotic Notwithstanding promising results, there still challenges mainly related scaling up from laboratory field proper formulation, including combinations result extended shelf-life both coated These limitations need addressed overcome order allow wider cost-effective method sustainable agricultural systems.

Язык: Английский

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Exploiting Biological Nitrogen Fixation: A Route Towards a Sustainable Agriculture

Plants, Год журнала: 2020, Номер 9(8), С. 1011 - 1011

Опубликована: Авг. 11, 2020

For all living organisms, nitrogen is an essential element, while being the most limiting in ecosystems and for crop production. Despite significant contribution of synthetic fertilizers, requirements food production increase from year to year, overuse agrochemicals compromise soil health agricultural sustainability. One alternative overcome this problem biological fixation (BNF). Indeed, more than 60% fixed N on Earth results BNF. Therefore, optimizing BNF agriculture urgent help meet demand needs growing world population. This optimization will require a good knowledge diversity nitrogen-fixing microorganisms, mechanisms fixation, selection formulation efficient N-fixing microorganisms as biofertilizers. Good understanding process may allow transfer ability other non-fixing or non-leguminous plants with high added value. minireview covers brief history BNF, cycle biofertilizers market value, use agriculture. The focuses particularly some effective microbial products marketed date, their efficiency, success-limiting It also highlights opportunities difficulties transferring capacity cereals.

Язык: Английский

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Biological Control Agents Against Fusarium Wilt of Banana

Frontiers in Microbiology, Год журнала: 2019, Номер 10

Опубликована: Апрель 5, 2019

In the last century, banana crop and industry experienced dramatic losses due to an epidemic of Fusarium wilt (FWB), caused by oxysporum f. sp. cubense (Foc) race 1. An even more menace is now feared spread Foc tropical 4. Plant genetic resistance generally considered as most plausible strategy for controlling effectively such a devastating disease, occurred first round FWB epidemic. Nevertheless, with at least 182 articles published since 1970, biological control represents large body knowledge on FWB. Remarkably, many studies deal agents (BCAs) that reached field-testing stage refer high effectiveness. Some selected BCAs have been repeatedly assayed in independent trials, suggesting their promising value. Overall under field conditions, has controlled up 79% using Pseudomonas spp. strains, 70% several endophytes Trichoderma strains. Lower biocontrol efficacy (42-55%) obtained arbuscular mycorrhizal fungi, Bacillus spp., non-pathogenic Studies Streptomyces mostly limited vitro conditions so far, very few pot-experiments, none conducted field. The applied diverse procedures (e.g., spore suspension, organic amendments, bioformulations, etc.) different stages plant development (i.e., vitro, nursery, transplanting, post-transplanting), but there no evidence protocol better than another. Nonetheless, new bioformulation technologies nanotechnology, formulation microbial consortia and/or metabolites, tailor-made strains should be encouraged. conclusion, literature offers examples BCAs, can greatly contribute limit damage More efforts done further validate currently available outcomes, deepen valuable improve setting effective formulations, application protocols, integrated strategies.

Язык: Английский

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