Salt-Tolerant Plant Growth Promoting Rhizobacteria for Enhancing Crop Productivity of Saline Soils

Frontiers in Microbiology, Journal Year: 2019, Volume and Issue: 10

Published: Dec. 18, 2019

Soil salinity has emerged as a serious issue for global food security. It is estimated that currently about 62 million hectares or 20 percent of the world’s irrigated land affected by salinity. The deposition an excess amount soluble salt in cultivable directly affects crop yields. uptake high inhibits diverse physiological and metabolic processes plants even impacting their survival. conventional methods reclamation saline soil which involve scraping, flushing, leaching adding amendment (e.g. gypsum, CaCl2, etc.) are limited success also adversely affect agro-ecosystems. In this context, developing sustainable increase productivity without harming environment necessary. Since long, breeding salt-tolerant development salt-resistant varieties have been tried, but these aforesaid approaches not able to solve problem. Salt tolerance dependence characteristics some microbes. Salt-tolerant microbes can survive osmotic ionic stress. Various genera plant growth promoting rhizobacteria (PGPR) isolated from extreme alkaline, saline, sodic soils. Many them known mitigate various biotic abiotic stresses plants. last few years, potential enhancing facing salt-stress researched upon clearly suggesting tolerant PGPR (ST-PGPR) be exploited agroecosystems. review, ST-PGPR agroecosystem will discussed. Apart this, mediated mechanisms different future research trends using soils highlighted.

Language: Английский

---

Trichoderma: a multipurpose, plant-beneficial microorganism for eco-sustainable agriculture

Nature Reviews Microbiology, Journal Year: 2022, Volume and Issue: 21(5), P. 312 - 326

Published: Nov. 22, 2022

Language: Английский

---

Plant Growth Stimulation by Microbial Consortia

Agronomy, Journal Year: 2021, Volume and Issue: 11(2), P. 219 - 219

Published: Jan. 24, 2021

Plant-associated microorganisms play an important role in agricultural production. Although various studies have shown that single can exert beneficial effects on plants, it is increasingly evident when a microbial consortium—two or more interacting microorganisms—is involved, additive synergistic results be expected. This occurs, part, due to the fact multiple species perform variety of tasks ecosystem like rhizosphere. Therefore, mechanisms plant growth stimulation (i.e., enhanced nutrient availability, phytohormone modulation, biocontrol, biotic and abiotic stress tolerance) exerted by different players within rhizosphere, such as plant-growth-promoting bacteria (PGPB) fungi (such Trichoderma Mycorrhizae), are reviewed. In addition, their interaction activity highlighted they act part consortium, mainly mixtures PGPB, PGPB–Mycorrhizae, PGPB–Trichoderma, under normal diverse conditions. Finally, we propose expansion use consortia, well increase research facilitate best most consistent field.

Language: Английский

---

Bacterial Plant Biostimulants: A Sustainable Way towards Improving Growth, Productivity, and Health of Crops

Sustainability, Journal Year: 2021, Volume and Issue: 13(5), P. 2856 - 2856

Published: March 6, 2021

This review presents a comprehensive and systematic study of the field bacterial plant biostimulants considers fundamental innovative principles underlying this technology. Plant are an important tool for modern agriculture as part integrated crop management (ICM) system, helping make more sustainable resilient. contain substance(s) and/or microorganisms whose function when applied to plants or rhizosphere is stimulate natural processes enhance nutrient uptake, use efficiency, tolerance abiotic stress, biocontrol, quality. The has gained substantial significant heed worldwide environmentally friendly alternative agricultural production. At present, there increasing curiosity in industry researchers about microbial biostimulants, especially (BPBs), improve growth productivity. BPBs that based on PGPR (plant growth-promoting rhizobacteria) play plausible roles promote/stimulate through several mechanisms include (i) acquisition by nitrogen (N2) fixation solubilization insoluble minerals (P, K, Zn), organic acids siderophores; (ii) antimicrobial metabolites various lytic enzymes; (iii) action regulators stress-responsive/induced phytohormones; (iv) ameliorating stress such drought, high soil salinity, extreme temperatures, oxidative heavy metals using different modes action; (v) defense induction modes. Presented here brief emphasizing applicability exertion fulfill current food crisis.

Language: Английский

---

Soil microbial inoculants for sustainable agriculture: Limitations and opportunities

Soil Use and Management, Journal Year: 2022, Volume and Issue: 38(3), P. 1340 - 1369

Published: April 10, 2022

Abstract The burgeoning global market for soil microbial inoculants use in agriculture is being driven by pressure to increase sustainable crop production managing pests and diseases without environmental impacts. Microbial inoculants, based predominantly on bacteria fungi, are applied as alternatives conventional inorganic fertilizers (biofertilizers) or carry out specific functions including biocontrol of (biopesticides), bioremediation enhancement characteristics. While some such rhizobia have a long successful history use, others performed inconsistently the field failed live up their promise suggested laboratory testing. A more precise understanding ecology modes action inoculant strains key optimizing efficacy guiding targeted situations where they address limitations production. This will require greater collaboration between science disciplines, microbiology, plant science, molecular biology agronomy. Inoculants must be produced formulated ensure effective establishment practicality implementation alongside existing cropping practices. New approaches strain selection construction beneficial consortia should lead efficacious products. Extensive rigorous evaluation under range conditions has rarely been undertaken urgently needed validate emerging products underpin growers, especially that largely unregulated at present.

Language: Английский

---

Microbial Interactions Within Multiple-Strain Biological Control Agents Impact Soil-Borne Plant Disease

Frontiers in Microbiology, Journal Year: 2020, Volume and Issue: 11

Published: Oct. 9, 2020

Major losses of crop yield and quality caused by soil-borne plant diseases have long threatened the ecology economy agriculture forestry. Biological control using beneficial microorganisms has become more popular for management pathogens as an environmentally friendly method protecting plants. Two major barriers limiting disease-suppressive function biocontrol microbes are inadequate colonization hosts inefficient inhibition pathogen growth, due to biotic abiotic factors acting in complex rhizosphere environments. Use a consortium microbial strains with disease inhibitory activity may improve efficacy disease-inhibiting microbes. The mechanisms biological not fully understood. In this review, we focus on bacterial fungal agents summarize current state use single strain multi-strain consortia diseases. We discuss potential used components suppressing efficacy. emphasize interaction-related be considered when constructing multiple-strain propose workflow assembling them applying reductionist synthetic community approach.

Language: Английский

---

Algae biostimulants: A critical look at microalgal biostimulants for sustainable agricultural practices

Biotechnology Advances, Journal Year: 2021, Volume and Issue: 49, P. 107754 - 107754

Published: April 21, 2021

Language: Английский

---

Tailoring plant-associated microbial inoculants in agriculture: a roadmap for successful application

Journal of Experimental Botany, Journal Year: 2020, Volume and Issue: 71(13), P. 3878 - 3901

Published: March 9, 2020

Abstract Plants are now recognized as metaorganisms which composed of a host plant associated with multitude microbes that provide the variety essential functions to adapt local environment. Recent research showed remarkable importance and range microbial partners for enhancing growth health plants. However, plant–microbe holobionts influenced by many different factors, generating complex interactive systems. In this review, we summarize insights from emerging field, highlighting factors contribute recruitment, selection, enrichment, dynamic interactions plant-associated microbiota. We then propose roadmap synthetic community application aim establishing sustainable agricultural systems use communities enhance productivity plants independently chemical fertilizers pesticides. Considering global warming climate change, suggest desert can serve suitable pool potentially beneficial maintain under abiotic stress conditions. Finally, framework advancing inoculants in agriculture.

Language: Английский

---

Recent Advances in Bacterial Amelioration of Plant Drought and Salt Stress

Biology, Journal Year: 2022, Volume and Issue: 11(3), P. 437 - 437

Published: March 12, 2022

The recent literature indicates that plant growth-promoting bacteria (PGPB) employ a range of mechanisms to augment plant's ability ameliorate salt and drought stress. These include synthesis auxins, especially indoleacetic acid, which directly promotes growth; antioxidant enzymes such as catalase, superoxide dismutase peroxidase, prevents the deleterious effects reactive oxygen species; small molecule osmolytes, e.g., trehalose proline, structures water content within bacterial cells reduces turgor pressure; nitrogen fixation, improves exopolysaccharides, protects from loss stabilizes soil aggregates; antibiotics, stress-debilitated plants pathogens; enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase, lowers level ACC ethylene in plants, thereby decreasing stress-induced senescence. Many reports overcoming these stresses indicate most successful PGPB possess several mechanisms; however, involvement any particular mechanism protection is nearly always inferred not proven.

Language: Английский

---

Solutions in microbiome engineering: prioritizing barriers to organism establishment

The ISME Journal, Journal Year: 2021, Volume and Issue: 16(2), P. 331 - 338

Published: Aug. 21, 2021

Abstract Microbiome engineering is increasingly being employed as a solution to challenges in health, agriculture, and climate. Often manipulation involves inoculation of new microbes designed improve function into preexisting microbial community. Despite, increased efforts microbiome inoculants frequently fail establish and/or confer long-lasting modifications on ecosystem function. We posit that one underlying cause these shortfalls the failure consider barriers organism establishment. This key challenge focus macroecology research, specifically invasion biology restoration ecology. adopt framework from summarizes establishment three categories: (1) propagule pressure, (2) environmental filtering, (3) biotic interactions factors. suggest most neglected factor we recommend number actions accelerate solutions.

Language: Английский

---