Synergistic Impacts of Plant-Growth-Promoting Bacteria and Selenium Nanoparticles on Improving the Nutritional Value and Biological Activities of Three Cultivars of <i>Brassica</i> Sprouts

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Abstract

Due to the growing world population and increasing environmental stress, improving the production, nutritional quality, and pharmaceutical applications of plants have become an urgent need. Therefore, current research was designed to investigate the impact of seed priming using plant-growth-promoting bacteria (PGPB) along with selenium nanoparticles (SeNPs) treatment on chemical and biological properties of three Brassica oleracea cultivars [Southern star (VA1), Prominence (VA2), Monotop (VA3)]. With this aim, one out of five morphologically different strains of bacteria, namely, JM18, which was further identified via 16S rRNA gene sequencing as a Nocardiopsis species with strong plant-growth-promoting traits, isolated from soil, was used. To explore the growth-promoting potential of Nocardiopsis species, seeds of three varieties of B. oleracea were primed with JM18 individually or in combination with SeNP treatment. Seed treatments increased sprout growth (fresh and dry weights) and glucosinolate accumulation. The activity of myrosinase was significantly increased through brassica sprouts and consequently enhanced the amino-acid-derived glucosinolate induction. Notably, a reduction in effective sulforaphane nitrile was detected, being positively correlated with a decrease in epithiospecifier protein (EP). Consequently, the antioxidant activities of VA2 and VA3, determined by the ferric reducing antioxidant power (FRAP) assay, were increased by 74 and 79%, respectively. Additionally, the antibacterial activities of JM18-treated cultivars were improved. However, a decrease was observed in SeNP- and JM18 + SeNP-treated VA2 and VA3 against Serratia marcescens and Candida glabrata and VA1 against S. marcescens. In conclusion, seed priming with the JM18 extract is a promising method to enhance the health-promoting activities of B. oleracea sprouts.

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Most cited references 38

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Mechanisms of action of plant growth promoting bacteria

Oluwaseyi Olanrewaju, Bernard Glick, Olubukola Babalola (2017)

The idea of eliminating the use of fertilizers which are sometimes environmentally unsafe is slowly becoming a reality because of the emergence of microorganisms that can serve the same purpose or even do better. Depletion of soil nutrients through leaching into the waterways and causing contamination are some of the negative effects of these chemical fertilizers that prompted the need for suitable alternatives. This brings us to the idea of using microbes that can be developed for use as biological fertilizers (biofertilizers). They are environmentally friendly as they are natural living organisms. They increase crop yield and production and, in addition, in developing countries, they are less expensive compared to chemical fertilizers. These biofertilizers are typically called plant growth-promoting bacteria (PGPB). In addition to PGPB, some fungi have also been demonstrated to promote plant growth. Apart from improving crop yields, some biofertilizers also control various plant pathogens. The objective of worldwide sustainable agriculture is much more likely to be achieved through the widespread use of biofertilizers rather than chemically synthesized fertilizers. However, to realize this objective it is essential that the many mechanisms employed by PGPB first be thoroughly understood thereby allowing workers to fully harness the potentials of these microbes. The present state of our knowledge regarding the fundamental mechanisms employed by PGPB is discussed herein.

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Broccoli sprouts: an exceptionally rich source of inducers of enzymes that protect against chemical carcinogens.

P Talalay, Chun-Yan Zhang, Ruth J. Fahey (1997)

Induction of phase 2 detoxication enzymes [e.g., glutathione transferases, epoxide hydrolase, NAD(P)H: quinone reductase, and glucuronosyltransferases] is a powerful strategy for achieving protection against carcinogenesis, mutagenesis, and other forms of toxicity of electrophiles and reactive forms of oxygen. Since consumption of large quantities of fruit and vegetables is associated with a striking reduction in the risk of developing a variety of malignancies, it is of interest that a number of edible plants contain substantial quantities of compounds that regulate mammalian enzymes of xenobiotic metabolism. Thus, edible plants belonging to the family Cruciferae and genus Brassica (e.g., broccoli and cauliflower) contain substantial quantities of isothiocyanates (mostly in the form of their glucosinolate precursors) some of which (e.g., sulforaphane or 4-methylsulfinylbutyl isothiocyanate) are very potent inducers of phase 2 enzymes. Unexpectedly, 3-day-old sprouts of cultivars of certain crucifers including broccoli and cauliflower contain 10-100 times higher levels of glucoraphanin (the glucosinolate of sulforaphane) than do the corresponding mature plants. Glucosinolates and isothiocyanates can be efficiently extracted from plants, without hydrolysis of glucosinolates by myrosinase, by homogenization in a mixture of equal volumes of dimethyl sulfoxide, dimethylformamide, and acetonitrile at -50 degrees C. Extracts of 3-day-old broccoli sprouts (containing either glucoraphanin or sulforaphane as the principal enzyme inducer) were highly effective in reducing the incidence, multiplicity, and rate of development of mammary tumors in dimethylbenz(a)anthracene-treated rats. Notably, sprouts of many broccoli cultivars contain negligible quantities of indole glucosinolates, which predominate in the mature vegetable and may give rise to degradation products (e.g., indole-3-carbinol) that can enhance tumorigenesis. Hence, small quantities of crucifer sprouts may protect against the risk of cancer as effectively as much larger quantities of mature vegetables of the same variety.

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Glucosinolate metabolism, functionality and breeding for the improvement of Brassicaceae vegetables

Masahiko Ishida, Masakazu Hara, Nobuko Fukino … (2014)

Unique secondary metabolites, glucosinolates (S-glucopyranosyl thiohydroximates), are naturally occurring S-linked glucosides found mainly in Brassicaceae plants. They are enzymatically hydrolyzed to produce sulfate ions, D-glucose, and characteristic degradation products such as isothiocyanates. The functions of glucosinolates in the plants remain unclear, but isothiocyanates possessing a pungent or irritating taste and odor might be associated with plant defense from microbes. Isothiocyanates have been studied extensively in experimental in vitro and in vivo carcinogenesis models for their cancer chemopreventive properties. The beneficial isothiocyanates, glucosinolates that are functional for supporting human health, have received attention from many scientists studying plant breeding, plant physiology, plant genetics, and food functionality. This review presents a summary of recent topics related with glucosinolates in the Brassica family, along with a summary of the chemicals, metabolism, and genes of glucosinolates in Brassicaceae. The bioavailabilities of isothiocyanates from certain functional glucosinolates and the importance of breeding will be described with emphasis on glucosinolates.

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Author and article information

Journal

Journal ID (nlm-ta): ACS Omega

Journal ID (iso-abbrev): ACS Omega

Journal ID (publisher-id): ao

Journal ID (coden): acsodf

Title: ACS Omega

Publisher: American Chemical Society

ISSN (Electronic): 2470-1343

Publication date (Electronic): 06 July 2023

Publication date Collection: 25 July 2023

Volume: 8

Issue: 29

Pages: 26414-26424

Affiliations

[† ]Botany and Microbiology Department, Faculty of Science, Beni-Suef University , Beni−Suef 62521, Egypt

[‡ ]Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp , 2020 Antwerp, Belgium

[§ ]Department of Biology, College of Science, Princess Nourah bint Abdulrahman University , P.O. Box 84428, Riyadh 11671, Saudi Arabia

[∥ ]Department of Biological Sciences, Abasyn University Islamabad Campus , Islamabad 44000, Pakistan

[⊥ ]Department of Biological Sciences, National University of Medical Sciences , Rawalpindi 46000, Pakistan

[# ]Department of Agronomy, Faculty of Agriculture, Mansoura University , Mansoura 35516, Egypt

[∇ ]Department of Botany, Division of Science and Technology, University of Education , Lahore 54770, Pakistan,

[○ ]Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University , Sakaka 72341, Saudi Arabia

[◆ ]School of Biotechnology, Nile University , Giza 12588, Egypt

[¶ ]Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro , Via Amendola 165/A, 70126 Bari, Italy

Author notes

[* ]Email: abdelrahim@ 123456nu.edu.eg .

Author information

Emad Alsherif https://orcid.org/0000-0002-7614-9595

Abdelrahim H. A. Hassan https://orcid.org/0000-0001-7905-6821

Mohammad Yaghoubi Khanghahi https://orcid.org/0000-0001-7594-4485

Article

DOI: 10.1021/acsomega.3c02957

PMC ID: 10373182

SO-VID: ed5cf604-82e2-44d4-bea1-ad8b912f42f7

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Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works ( https://creativecommons.org/licenses/by-nc-nd/4.0/).

History

Date received : 29 April 2023

Date accepted : 26 June 2023

Funding

Funded by: Princess Nourah Bint Abdulrahman University, doi 10.13039/501100004242;

Award ID: PNURSP2023R214

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document-id-new-14 ao3c02957

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Synergistic Impacts of Plant-Growth-Promoting Bacteria and Selenium Nanoparticles on Improving the Nutritional Value and Biological Activities of Three Cultivars of Brassica Sprouts

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Most cited references 38

Mechanisms of action of plant growth promoting bacteria

Broccoli sprouts: an exceptionally rich source of inducers of enzymes that protect against chemical carcinogens.

Glucosinolate metabolism, functionality and breeding for the improvement of Brassicaceae vegetables

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