Encapsulation of plant growth promoting Rhizobacteria—prospects and potential in agricultural sector: a review

Vejan, Pravin; Khadiran, Tumirah; Abdullah, Rosazlin; Ismail, Salmah; Dadrasnia, Arezoo

doi:10.1080/01904167.2019.1659330

Cited by 39 publications

(23 citation statements)

References 137 publications

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“…The basic characteristics of an effective delivery system include easy mode of delivery; enhancement of target activities with effective concentration; little or no ecotoxicity; time controlled release; solubility, stability, and effectiveness (Vejan et al, 2019). In the last several decades, exogenous application to plants, seeds or soil with microbial products has mostly been in the forms of powder, granules, slurry, or liquid.…”

Section: Deliverymentioning

confidence: 99%

Benefits to Plant Health and Productivity From Enhancing Plant Microbial Symbionts

et al. 2021

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Plants exist in close association with uncountable numbers of microorganisms around, on, and within them. Some of these endophytically colonize plant roots. The colonization of roots by certain symbiotic strains of plant-associated bacteria and fungi results in these plants performing better than plants whose roots are colonized by only the wild populations of microbes. We consider here crop plants whose roots are inhabited by introduced organisms, referring to them as Enhanced Plant Holobionts (EPHs). EPHs frequently exhibit resistance to specific plant diseases and pests (biotic stresses); resistance to abiotic stresses such as drought, cold, salinity, and flooding; enhanced nutrient acquisition and nutrient use efficiency; increased photosynthetic capability; and enhanced ability to maintain efficient internal cellular functioning. The microbes described here generate effects in part through their production of Symbiont-Associated Molecular Patterns (SAMPs) that interact with receptors in plant cell membranes. Such interaction results in the transduction of systemic signals that cause plant-wide changes in the plants’ gene expression and physiology. EPH effects arise not only from plant-microbe interactions, but also from microbe-microbe interactions like competition, mycoparasitism, and antibiotic production. When root and shoot growth are enhanced as a consequence of these root endophytes, this increases the yield from EPH plants. An additional benefit from growing larger root systems and having greater photosynthetic capability is greater sequestration of atmospheric CO2. This is transferred to roots where sequestered C, through exudation or root decomposition, becomes part of the total soil carbon, which reduces global warming potential in the atmosphere. Forming EPHs requires selection and introduction of appropriate strains of microorganisms, with EPH performance affected also by the delivery and management practices.

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Section: Deliverymentioning

confidence: 99%

Benefits to Plant Health and Productivity From Enhancing Plant Microbial Symbionts

et al. 2021

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“…Polysaccharides are extensively used as natural capsule materials for cell encapsulation [ 115 ]. Figure 3 shows the advantages of polysaccharides over polymers [ 115 , 116 ] and polymeric inoculants for formulation and encapsulation [ 101 ].…”

Section: Polysaccharides For Encapsulation Of Pgpbsmentioning

confidence: 99%

Reducing Drought Stress in Plants by Encapsulating Plant Growth-Promoting Bacteria with Polysaccharides

Riseh

Ebrahimi-Zarandi

Vazvani

et al. 2021

IJMS

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Drought is a major abiotic stress imposed by climate change that affects crop production and soil microbial functions. Plants respond to water deficits at the morphological, biochemical, and physiological levels, and invoke different adaptation mechanisms to tolerate drought stress. Plant growth-promoting bacteria (PGPB) can help to alleviate drought stress in plants through various strategies, including phytohormone production, the solubilization of mineral nutrients, and the production of 1-aminocyclopropane-1-carboxylate deaminase and osmolytes. However, PGPB populations and functions are influenced by adverse soil factors, such as drought. Therefore, maintaining the viability and stability of PGPB applied to arid soils requires that the PGPB have to be protected by suitable coatings. The encapsulation of PGPB is one of the newest and most efficient techniques for protecting beneficial bacteria against unfavorable soil conditions. Coatings made from polysaccharides, such as sodium alginate, chitosan, starch, cellulose, and their derivatives, can absorb and retain substantial amounts of water in the interstitial sites of their structures, thereby promoting bacterial survival and better plant growth.

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“…To the best of our knowledge, no review has yet described the pathology of the fungus in relation with biological means to increase the resistance of the host. Beneficial bacteria are attracting attention in light of their potential use in agriculture ( Babalola, 2010 ; Dutta and Podile, 2010 ; Vejan et al, 2016 , 2019 ; Ferreira et al, 2019 ; Kumari et al, 2019 ; Prasad et al, 2019 ; Kumar et al, 2020 ). The present review provides an overview of the existing knowledge on the interaction between P. teres and barley and summarizes the current and ongoing research on P. teres .…”

Section: Introductionmentioning

confidence: 99%

Pyrenophora teres: Taxonomy, Morphology, Interaction With Barley, and Mode of Control

et al. 2021

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Net blotch, induced by the ascomycete Pyrenophora teres, has become among the most important disease of barley (Hordeum vulgare L.). Easily recognizable by brown reticulated stripes on the sensitive barley leaves, net blotch reduces the yield by up to 40% and decreases seed quality. The life cycle, the mode of dispersion and the development of the pathogen, allow a quick contamination of the host. Crop residues, seeds, and wild grass species are the inoculum sources to spread the disease. The interaction between the barley plant and the fungus is complex and involves physiological changes with the emergence of symptoms on barley and genetic changes including the modulation of different genes involved in the defense pathways. The genes of net blotch resistance have been identified and their localizations are distributed on seven barley chromosomes. Considering the importance of this disease, several management approaches have been performed to control net blotch. One of them is the use of beneficial bacteria colonizing the rhizosphere, collectively referred to as Plant Growth Promoting Rhizobacteria. Several studies have reported the protective role of these bacteria and their metabolites against potential pathogens. Based on the available data, we expose a comprehensive review of Pyrenophora teres including its morphology, interaction with the host plant and means of control.

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Encapsulation of plant growth promoting Rhizobacteria—prospects and potential in agricultural sector: a review

Cited by 39 publications

References 137 publications

Benefits to Plant Health and Productivity From Enhancing Plant Microbial Symbionts

Benefits to Plant Health and Productivity From Enhancing Plant Microbial Symbionts

Reducing Drought Stress in Plants by Encapsulating Plant Growth-Promoting Bacteria with Polysaccharides

Pyrenophora teres: Taxonomy, Morphology, Interaction With Barley, and Mode of Control

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