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Article: The potential mechanistic insights and future implications for the effect of prebiotics on poultry performance, gut microbiome, and intestinal morphology

Yaqoob, M.U / El-Hack, M.E. Abd / Hassan, F / El-Saadony, M.T / Khafaga, A.F / Batiha, G.E / Yehia, N / Elnesr, S.S / Alagawany, M / El-Tarabily, K.A / Wang, M

Poultry science. 2021 July, v. 100, no. 7

2021

Abstract: Prebiotics may modify the biological processes in the chickens' gastrointestinal tract to improve poultry performance and health. Prebiotics are natural feed additives that offer many economic advantages by decreasing mortality rates, increasing growth ... ...

Abstract	Prebiotics may modify the biological processes in the chickens' gastrointestinal tract to improve poultry performance and health. Prebiotics are natural feed additives that offer many economic advantages by decreasing mortality rates, increasing growth rates, and improving birds' feed efficiency. Prebiotic action potentially affects the degradation of indigestible dietary compounds, the synthesis of nitrogen components and vitamins, and simplifies the removal of undesirable elements in the diet. Prebiotics could also induce desirable gut microbiome modifications and affect host metabolism and immune health. It is worth mentioning that gut bacteria metabolize the prebiotic compounds into organic compounds that the host can subsequently use. It is important to limit the concept of prebiotics to compounds that influence the metabolism of resident microorganisms. Any medicinal component or feed ingredient beneficial to the intestinal microecosystem can be considered a prebiotic. In this review, the impacts of prebiotics on the gut microbiome and physiological structure are discussed, emphasizing the poultry's growth performance. The current review will highlight the knowledge gaps in this area and future research directions.
Keywords	digestive tract ; feed composition ; feed conversion ; growth performance ; intestinal microorganisms ; intestines ; metabolism ; mortality ; nitrogen ; prebiotics
Language	English
Dates of publication	2021-07
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	242586-5
ISSN	1525-3171 ; 0032-5791
ISSN (online)	1525-3171
ISSN	0032-5791
DOI	10.1016/j.psj.2021.101143
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: The potential mechanistic insights and future implications for the effect of prebiotics on poultry performance, gut microbiome, and intestinal morphology.

Yaqoob, M U / El-Hack, M E Abd / Hassan, F / El-Saadony, M T / Khafaga, A F / Batiha, G E / Yehia, N / Elnesr, S S / Alagawany, M / El-Tarabily, K A / Wang, M

Poultry science

2021 Volume 100, Issue 7, Page(s) 101143

Abstract	Prebiotics may modify the biological processes in the chickens' gastrointestinal tract to improve poultry performance and health. Prebiotics are natural feed additives that offer many economic advantages by decreasing mortality rates, increasing growth rates, and improving birds' feed efficiency. Prebiotic action potentially affects the degradation of indigestible dietary compounds, the synthesis of nitrogen components and vitamins, and simplifies the removal of undesirable elements in the diet. Prebiotics could also induce desirable gut microbiome modifications and affect host metabolism and immune health. It is worth mentioning that gut bacteria metabolize the prebiotic compounds into organic compounds that the host can subsequently use. It is important to limit the concept of prebiotics to compounds that influence the metabolism of resident microorganisms. Any medicinal component or feed ingredient beneficial to the intestinal microecosystem can be considered a prebiotic. In this review, the impacts of prebiotics on the gut microbiome and physiological structure are discussed, emphasizing the poultry's growth performance. The current review will highlight the knowledge gaps in this area and future research directions.
MeSH term(s)	Animals ; Chickens ; Gastrointestinal Microbiome ; Gastrointestinal Tract/chemistry ; Poultry ; Prebiotics/analysis
Chemical Substances	Prebiotics
Language	English
Publishing date	2021-03-23
Publishing country	England
Document type	Journal Article ; Review
ZDB-ID	242586-5
ISSN	1525-3171 ; 0032-5791
ISSN (online)	1525-3171
ISSN	0032-5791
DOI	10.1016/j.psj.2021.101143
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Article: Suppression of Rhizoctonia solani diseases of sugar beet by antagonistic and plant growth-promoting yeasts.

El-Tarabily, K A

Journal of applied microbiology

2003 Volume 96, Issue 1, Page(s) 69–75

Abstract: Aims: Isolates of Candida valida, Rhodotorula glutinis and Trichosporon asahii from the rhizosphere of sugar beet in Egypt were examined for their ability to colonize roots, to promote plant growth and to protect sugar beet from Rhizoctonia solani AG-2- ... ...

Abstract	Aims: Isolates of Candida valida, Rhodotorula glutinis and Trichosporon asahii from the rhizosphere of sugar beet in Egypt were examined for their ability to colonize roots, to promote plant growth and to protect sugar beet from Rhizoctonia solani AG-2-2 diseases, under glasshouse conditions. Methods and results: Root colonization abilities of the three yeast species were tested using the root colonization plate assay and the sand-tube method. In the root colonization plate assay, C. valida and T. asahii colonized 95% of roots after 6 days, whilst Rhod. glutinis colonized 90% of roots after 8 days. Root-colonization abilities of the three yeast species tested by the sand-tube method showed that roots and soils attached to roots of sugar beet seedlings were colonized to different degrees. Population densities showed that the three yeast species were found at all depths of the rhizosphere soil adhering to taproots up to 10 cm, but population densities were significantly (P < 0.05) greater in the first 4 cm of the root system compared with other root depths. The three yeast species, applied individually or in combination, significantly (P < 0.05) promoted plant growth and reduced damping off, crown and root rots of sugar beet in glasshouse trials. The combination of the three yeasts (which were not inhibitory to each other) resulted in significantly (P < 0.05) better biocontrol of diseases and plant growth promotion than plants exposed to individual species. Conclusions: Isolates of C. valida, Rhod. glutinis and T. asahii were capable of colonizing sugar beet roots, promoting growth of sugar beet and protecting the seedlings and mature plants from R. solani diseases. This is the first successful attempt to use yeasts as biocontrol agents against R. solani which causes root diseases. Significance and impact of the study: Yeasts were shown to provide significant protection to sugar beet roots against R. solani, a serious soil-borne root pathogen. Yeasts also have the potential to be used as biological fertilizers.
MeSH term(s)	Antibiosis ; Beta vulgaris/growth & development ; Beta vulgaris/microbiology ; Candida/physiology ; Plant Diseases/microbiology ; Plant Roots/microbiology ; Rhizoctonia/growth & development ; Rhizoctonia/isolation & purification ; Rhizoctonia/pathogenicity ; Rhodotorula/physiology ; Soil Microbiology ; Trichosporon/physiology
Language	English
Publishing date	2003-11-05
Publishing country	England
Document type	Journal Article
ZDB-ID	1358023-1
ISSN	1365-2672 ; 1364-5072
ISSN (online)	1365-2672
ISSN	1364-5072
DOI	10.1046/j.1365-2672.2003.02043.x
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Article: Rhizosphere-competent isolates of streptomycete and non-streptomycete actinomycetes capable of producing cell-wall-degrading enzymes to control Pythium aphanidermatum damping-off disease of cucumber

El-Tarabily, K.A

Canadian journal of botany = Revue canadienne de botanique. 2006 Feb., v. 84, no. 2

2006

Keywords	Cucumis sativus ; cucumbers ; Pythium aphanidermatum ; plant pathogenic fungi ; damping off ; rhizosphere ; Actinomycetales ; Streptomycetaceae ; fungal antagonists ; microbial colonization ; biological control agents ; biological control ; beta-glucanase ; cellulases ; cell walls ; hyphae ; metabolites ; cellulose ; disease control
Language	English
Dates of publication	2006-02
Size	p. 211-222.
Document type	Article
Note	Summary in French.
ZDB-ID	1481926-0
ISSN	1480-3305 ; 0008-4026
ISSN (online)	1480-3305
ISSN	0008-4026
DOI	10.1139/B05-153
Database	NAL-Catalogue (AGRICOLA)

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Article: Impacts of nano-emulsified vegetable oil on growth, hemato-biochemical markers, oxidative stress, and gut microbiota of New Zealand white and V-line rabbits

Ghanima, M. M. A. / Ibrahim, S. A. / Atta, M. S. / Ajarem, J. S. / Maodaa, S. N. / Allam, A. A. / Taha, A. E. / Abd El-Hack, M. E. / El-Tarabily, K. A. / El-Aziz, A. H. A.

Livestock science

2021 Volume 252, Issue -, Page(s) 104651

Language	English
Document type	Article
ZDB-ID	2226176-X
ISSN	1871-1413
Database	Current Contents Nutrition, Environment, Agriculture

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Article: Suppression of Rhizoctonia solani diseases of sugar beet by antagonistic and plant growth-promoting yeasts

El-Tarabily, K.A

Journal of applied microbiology. 2004, v. 96, no. 1

2004

Language	English
Size	p. 69-75.
Document type	Article
ZDB-ID	1358023-1
ISSN	1364-5072
ISSN	1364-5072
Database	NAL-Catalogue (AGRICOLA)

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Article: Non-streptomycete actinomycetes as biocontrol agents of soil-borne fungal plant pathogens and as plant growth promoters

El-Tarabily, K.A / Sivasithamparam, K

Soil biology & biochemistry. 2006 July, v. 38, issue 7

2006

Abstract: Among soil microorganisms, bacteria and fungi and to a lesser extent actinomycetes, have received considerable attention as biocontrol agents of soil-borne fungal plant pathogens and as plant growth promoters. Within actinomycetes, Streptomyces spp. have ...

Abstract	Among soil microorganisms, bacteria and fungi and to a lesser extent actinomycetes, have received considerable attention as biocontrol agents of soil-borne fungal plant pathogens and as plant growth promoters. Within actinomycetes, Streptomyces spp. have been investigated predominantly, mainly because of their dominance on, and the ease of isolation from, dilution plates and because of the commercial interest shown on the antibiotics produced by certain Streptomyces spp. Many of non-streptomycete actinomycetes (NSA) taxa are therefore rarely reported in literature dealing with routine isolations of biocontrol agents and/or plant growth promoters from plant and soil. It is clear that special isolation methods need to be employed in routine isolations to selectively isolate NSA. Some interesting information exists, albeit in relatively few reports compared to that on other microorganisms, on the biological activities of NSA, especially in relation to their mechanisms of action in the biological control of soil-borne fungal plant pathogens and plant growth promotion. This review presents an overview of this information and seeks to encourage further investigations into what may be considered a relatively unexplored area of research. Certain soil environmental factors, especially in horticultural systems, could be manipulated to render the soil conducive for the biological activities of NSA. A variety of NSA isolated by selective methods have not only shown to be rhizosphere competent but also adapted for an endophytic life in root cortices. Some of the NSA, including endophytic strains that have shown potential to suppress soil-borne fungal plant pathogens, are able to employ one or more mechanisms of antagonism including antibiosis, hyperparasitism and the production of cell-wall degrading enzymes. Strains of NSA promote plant growth by producing plant growth regulators. Enhancement of plant growth by the antagonists are considered to help the host by producing compensatory roots that mask the impact of root diseases.
Keywords	biological control agents ; soil bacteria ; plant growth-promoting rhizobacteria ; microbial activity ; nitrogen-fixing bacteria ; Actinomycetales ; Frankia ; soil-borne diseases ; plant pathogenic fungi ; mechanism of action ; disease control ; rhizosphere ; antibiosis ; hyperparasitism ; cell walls ; degradation ; enzymes ; application methods ; plant growth substances
Language	English
Dates of publication	2006-07
Size	p. 1505-1520.
Document type	Article
ZDB-ID	280810-9
ISSN	0038-0717
ISSN	0038-0717
DOI	10.1016/j.soilbio.2005.12.017
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Plant growth promotion and biological control of Pythium aphanidermatum, a pathogen of cucumber, by endophytic actinomycetes.

El-Tarabily, K A / Nassar, A H / Hardy, G E St J / Sivasithamparam, K

Journal of applied microbiology

2009 Volume 106, Issue 1, Page(s) 13–26

Abstract: Aims: To evaluate the potential of Actinoplanes campanulatus, Micromonospora chalcea and Streptomyces spiralis endophytic in cucumber roots, to promote plant growth and to protect seedlings and mature plants of cucumber from diseases caused by Pythium ... ...

Abstract	Aims: To evaluate the potential of Actinoplanes campanulatus, Micromonospora chalcea and Streptomyces spiralis endophytic in cucumber roots, to promote plant growth and to protect seedlings and mature plants of cucumber from diseases caused by Pythium aphanidermatum, under greenhouse conditions. Methods and results: Three endophytic isolates, out of 29, were selected through tests aimed at understanding their mechanisms of action as biocontrol agents and plant growth promoters. When applied individually or in combination, they significantly promoted plant growth and reduced damping-off and crown and root rot of cucumber. The combination of the three isolates resulted in significantly better suppression of diseases and plant growth promotion, than where the plants were exposed to individual strains. Conclusions: The three selected actinomycete isolates colonized cucumber roots endophytically for 8 weeks, promoted plant growth and suppressed pathogenic activities of P. aphanidermatum on seedling and mature cucumber plants. Significance and impact of the study: The results clearly show that the endophytic, glucanase-producing actinomycetes used, especially as a combined treatment, could replace metalaxyl, which is the currently recommended fungicide for Pythium diseases in the United Arab Emirates. These endophytic isolates also have the potential to perform as plant growth promoters, which is a useful attribute for crop production in nutrient impoverished soils.
MeSH term(s)	Actinobacteria/physiology ; Animals ; Antibiosis ; Cucumis sativus/growth & development ; Cucumis sativus/microbiology ; Micromonospora ; Pest Control, Biological ; Plant Diseases/microbiology ; Plant Roots/microbiology ; Pythium/growth & development ; Pythium/microbiology ; Pythium/pathogenicity ; Streptomyces
Language	English
Publishing date	2009-01
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1358023-1
ISSN	1365-2672 ; 1364-5072
ISSN (online)	1365-2672
ISSN	1364-5072
DOI	10.1111/j.1365-2672.2008.03926.x
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Article: Plant growth promotion and biological control of Pythium aphanidermatum, a pathogen of cucumber, by endophytic actinomycetes

El-Tarabily, K.A / Nassar, A.H / Hardy, G.E.St.J / Sivasithamparam, K

Journal of applied microbiology. 2009 Jan., v. 106, no. 1

2009

Abstract: To evaluate the potential of Actinoplanes campanulatus, Micromonospora chalcea and Streptomyces spiralis endophytic in cucumber roots, to promote plant growth and to protect seedlings and mature plants of cucumber from diseases caused by Pythium ... ...

Abstract	To evaluate the potential of Actinoplanes campanulatus, Micromonospora chalcea and Streptomyces spiralis endophytic in cucumber roots, to promote plant growth and to protect seedlings and mature plants of cucumber from diseases caused by Pythium aphanidermatum, under greenhouse conditions. Three endophytic isolates, out of 29, were selected through tests aimed at understanding their mechanisms of action as biocontrol agents and plant growth promoters. When applied individually or in combination, they significantly promoted plant growth and reduced damping-off and crown and root rot of cucumber. The combination of the three isolates resulted in significantly better suppression of diseases and plant growth promotion, than where the plants were exposed to individual strains. The three selected actinomycete isolates colonized cucumber roots endophytically for 8 weeks, promoted plant growth and suppressed pathogenic activities of P. aphanidermatum on seedling and mature cucumber plants. The results clearly show that the endophytic, glucanase-producing actinomycetes used, especially as a combined treatment, could replace metalaxyl, which is the currently recommended fungicide for Pythium diseases in the United Arab Emirates. These endophytic isolates also have the potential to perform as plant growth promoters, which is a useful attribute for crop production in nutrient impoverished soils.
Keywords	plant growth substances
Language	English
Dates of publication	2009-01
Size	p. 13-26.
Publisher	Blackwell Publishing Ltd
Publishing place	Oxford, UK
Document type	Article
ZDB-ID	1358023-1
ISSN	1364-5072
ISSN	1364-5072
DOI	10.1111/j.1365-2672.2008.03926.x
Database	NAL-Catalogue (AGRICOLA)

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Article: Isolation and characterisation of sulfur-oxidising bacteria, including strains of Rhizobium, from calcareous sandy soils and their effects on nutrient uptake and growth of maize (Zea mays L.)

El-Tarabily, K.A / Soaud, A.A / Saleh, M.E / Matsumoto, S

Australian journal of agricultural research. 2006, v. 57, no. 1

2006

Keywords	soil bacteria ; Paracoccus versutus ; Paracoccus pantotrophus ; Rhizobium ; strains ; soil inoculation ; sulfur ; oxidation ; calcareous soils ; sandy soils ; arid soils ; Zea mays ; corn ; plant growth ; greenhouse production ; nutrient uptake ; chemical constituents of plants ; roots ; shoots ; United Arab Emirates
Language	English
Size	p. 101-111.
Document type	Article
ZDB-ID	410463-8
ISSN	0004-9409
ISSN	0004-9409
Database	NAL-Catalogue (AGRICOLA)

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