Plant‐Microbe Interactions and Secondary Metabolites with Antiviral, Antibacterial and Antifungal Properties

Reichling, Jürgen

doi:10.1002/9781119312994.apr0022

Cited by 26 publications

(24 citation statements)

References 252 publications

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“…Root exudates are phytochemicals released by plant roots that actively regulate symbiotic interactions with rhizobacteria in active soil zones of the rhizosphere [97,98]. Plant-microbe interactions, governed by root exudates via the chemotactic response of the microbes toward root-secreted organic compounds, play an important role in root colonization and biological control (antifungal, antibacterial, and antiviral) activities [99][100][101]. For example, the endophytic bacteria Corynebacterium flavescens and B. pumilus showed a fivefold increase of chemotaxis activity over other bacterial strains in the rice rhizosphere in the presence of amino acids and carbohydrate Agriculture 2019, 9, 142 7 of 13 root exudates [102].…”

Section: Communication Between Pgpr Rhizodeposits and Roots In Thementioning

confidence: 99%

The Interactions of Rhizodeposits with Plant Growth-Promoting Rhizobacteria in the Rhizosphere: A Review

2019

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Rhizodeposits, root exudates, and root border cells are vital components of the rhizosphere that significantly affect root colonization capacity and multiplication of rhizosphere microbes, as well as secretion of organic bioactive compounds. The rhizosphere is an ecological niche, in which beneficial bacteria compete with other microbiota for organic carbon compounds and interact with plants through root colonization activity to the soil. Some of these root-colonizing beneficial rhizobacteria also colonize endophytically and multiply inside plant roots. In the rhizosphere, these components contribute to complex physiological processes, including cell growth, cell differentiation, and suppression of plant pathogenic microbes. Understanding how rhizodeposits, root exudates, and root border cells interact in the rhizosphere in the presence of rhizobacterial populations is necessary to decipher their synergistic role for the improvement of plant health. This review highlights the diversity of plant growth-promoting rhizobacteria (PGPR) genera, their functions, and the interactions with rhizodeposits in the rhizosphere.Agriculture 2019, 9, 142 2 of 13 in the rhizosphere [12,13], and these interactions that influence plant growth and crop yields [14] can be root-root, root-insect, and root-microbe interactions [15]. The role of the rhizosphere is pivotal for plant growth-promotion, nutrition, and crop quality [16] because of the importance of plant-microbe interactions in the rhizosphere carbon sequestration, nutrient cycling, and ecosystem functioning [17]. In addition, the rhizosphere is where plant roots communicate with beneficial rhizobacteria for energy and nutrition. Plant growth-promoting rhizobacteria (PGPR) may affect plant growth, development, and disease suppression by one or more direct or indirect mechanisms. Bacterial genera such as Bacillus and Pseudomonas have been extensively studied and utilized as biocontrol agents, biofertilizers, and also have been shown to trigger induced systemic resistance (ISR) [18][19][20][21][22][23][24]. In this review, we discuss the importance, functions, and effects of root-derived organic molecules secreted in the rhizosphere and their interactions with plant growth-promoting rhizobacteria (PGPR) for enhancing plant growth and biological control of plant pathogens. PGPR Diversity in the RhizosphereThe plant rhizosphere contains diverse rhizobacterial species with the potential to enhance plant growth and biological control activity. PGPR genera present in the rhizosphere include Agrobacterium,

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Section: Communication Between Pgpr Rhizodeposits and Roots In Thementioning

confidence: 99%

The Interactions of Rhizodeposits with Plant Growth-Promoting Rhizobacteria in the Rhizosphere: A Review

2019

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“…Many plants have been screened for their antimicrobial properties based on traditional medicine reports or random screening programs (Savoia, 2012). Various plant metabolites have demonstrated antimicrobial properties including phenolic secondary metabolites (biophenols) (Obied, 2013), terpenoids, alkaloids, peptides and miscellaneous (Cowan, 1999;Gibbons, 2008;Reichling, 2010). Plant constituents can display direct antimicrobial activity (killing microbes) as well as indirect activities such as enhancing immune response or inhibitory activities against efflux pump, quorum sensing or biofilm formation (Savoia, 2012).…”

Section: Introductionmentioning

confidence: 99%

Plant Phenols as Antibiotic Boosters: In Vitro Interaction of Olive Leaf Phenols with Ampicillin

Lim

Subhan²,

Jazayeri³

et al. 2016

Phytotherapy Research

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The antimicrobial properties of olive leaf extract (OLE) have been well recognized in the Mediterranean traditional medicine. Few studies have investigated the antimicrobial properties of OLE. In this preliminary study, commercial OLE and its major phenolic secondary metabolites were evaluated in vitro for their antimicrobial activities against Escherichia coli and Staphylococcus aureus, both individually and in combination with ampicillin. Besides luteolin 7-O-glucoside, OLE and its major phenolic secondary metabolites were effective against both bacteria, with more activity on S. aureus. In combination with ampicillin, OLE, caffeic acid, verbascoside and oleuropein showed additive effects. Synergistic interaction was observed between ampicillin and hydroxytyrosol. The phenolic composition of OLE and the stability of olive phenols in assay medium were also investigated. While OLE and its phenolic secondary metabolites may not be potent enough as stand-alone antimicrobials, their abilities to boost the activity of co-administered antibiotics constitute an imperative future research area.

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“…In addition to the main anti-cancer alkaloids, which have been presented above, a number of other terpenes, or phenolic compounds, which are common in many other plant species of the Lamiaceae, Asteracea and Fabaceae families, among others, are of potential value. Many such compounds are known to possess various anti-inflammatory, anticancer, antioxidant, antidiabetic, hepatoprotective or antimicrobial properties [15][16][17][18][19][20][21][22][23]. Of these, the antibacterial properties have drawn significant interest due to the growing problem of bacterial infections around the world [92,93].…”

Section: Overproduction Of Other Secondary Metabolites In Transgenicmentioning

confidence: 99%

“…Secondary metabolites can affect cancer cells by interfering with their division, and by changing their metabolism and even the expression of selected genes. Many also have antioxidant [15,16], anti-inflammatory [17,18], antibacterial [19], antifungal [20,21], neurological [22] or hepatoprotective [23] effects. As plants represent such an important source of many secondary metabolites, there is great interest in increasing their biosynthetic rates as part of green biotechnology, which includes the use of transgenic plants or other photosynthetic organisms for industrial purposes.…”

Section: Introductionmentioning

confidence: 99%

Transgenesis as a Tool for the Efficient Production of Selected Secondary Metabolites from Plant in Vitro Cultures

Kowalczyk

Wieczfińska

Skała

et al. 2020

Plants

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The plant kingdom abounds in countless species with potential medical uses. Many of them contain valuable secondary metabolites belonging to different classes and demonstrating anticancer, anti-inflammatory, antioxidant, antimicrobial or antidiabetic properties. Many of these metabolites, e.g., paclitaxel, vinblastine, betulinic acid, chlorogenic acid or ferrulic acid, have potential applications in medicine. Additionally, these compounds have many therapeutic and health-promoting properties. The growing demand for these plant secondary metabolites forces the use of new green biotechnology tools to create new, more productive in vitro transgenic plant cultures. These procedures have yielded many promising results, and transgenic cultures have been found to be safe, efficient and cost-effective sources of valuable secondary metabolites for medicine and industry. This review focuses on the use of various in vitro plant culture systems for the production of secondary metabolites.

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Plant‐Microbe Interactions and Secondary Metabolites with Antiviral, Antibacterial and Antifungal Properties

Abstract: The sections in this article are Introduction Induced Local Defence by Means of Phytoalexins Antibacterial and Antifungal Agents of Higher Plants Secondary Metabolites from Higher Plants with Antiviral Properties Conclusions

Cited by 26 publications

References 252 publications

The Interactions of Rhizodeposits with Plant Growth-Promoting Rhizobacteria in the Rhizosphere: A Review

The Interactions of Rhizodeposits with Plant Growth-Promoting Rhizobacteria in the Rhizosphere: A Review

Plant Phenols as Antibiotic Boosters: In Vitro Interaction of Olive Leaf Phenols with Ampicillin

Transgenesis as a Tool for the Efficient Production of Selected Secondary Metabolites from Plant in Vitro Cultures

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