Plant Extract Control of the Fungi Associated with Different Egyptian Wheat Cultivars Grains

Baka, Zakaria A. M.

doi:10.2478/jppr-2014-0035

Cited by 23 publications

(10 citation statements)

References 29 publications

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“…Between these options are biological plant products, which are bio-efficacious, biodegradable, cost-effective and safe for the environment. Many investigators used biological plant products to control plant pathogens [3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles Using Pomegranate and Orange Peel Extracts and Their Antifungal Activity against Alternaria solani, the Causal Agent of Early Blight Disease of Tomato

Mostafa

Alamri

Alrumman

et al. 2021

Plants

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This study aimed to synthesize silver nanoparticles (AgNPs) by pomegranate and orange peel extracts using a low concentration of AgNO3 solution to controlearly blight of tomato caused by Alternaria solani. The pathogen was isolated from infected tomato plants growing in different areas of Saudi Arabia. The isolates of this pathogen were morphologically and molecularly identified. Extracts from peels of pomegranate and orange fruits effectively developed a simple, quick, eco-friendly and economical method through a synthesis of AgNPs as antifungal agents against A. solani. Phenolic content in the pomegranate peel extract was greater than orange peel extract. Phenolic compounds showed a variation of both peel extracts as identified and quantified by High-Performance Liquid Chromatography. The phenolic composition displayed variability as the pomegranate peel extract exhibited an exorbitant amount of Quercitrin (23.62 mg/g DW), while orange peel extract recorded a high amount of Chlorogenic acid (5.92 mg/g DW). Biosynthesized AgNPs were characterized using UV- visible spectroscopy which recorded an average wavelength of 437 nm and 450 nm for pomegranate and orange peels, respectively. Fourier-transform infrared spectroscopy exhibited 32x73.24, 2223.71, 2047.29 and 1972.46 cm−1, and 3260.70, 1634.62, 1376.62 and 1243.76 cm−1 for pomegranate and orange peels, respectively. Transmission electron microscopy showed spherical shape of nanoparticles. Zetasizer analysis presented negative charge values; −16.9 and −19.5 mV with average particle sizes 8 and 14 nm fin case of pomegranate and orange peels, respectively. In vitro, antifungal assay was done to estimate the possibility of biosynthesized AgNPs and crude extracts of fruit peels to reduce the mycelial growth of A. solani. AgNPs displayed more fungal mycelial inhibition than crude extracts of two peels and AgNO3. We recommend the use of AgNPs synthesized from fruit peels for controlling fungal plant pathogens and may be applied broadly and safely in place by using the chemical fungicides, which display high toxicity for humans.

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Section: Introductionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles Using Pomegranate and Orange Peel Extracts and Their Antifungal Activity against Alternaria solani, the Causal Agent of Early Blight Disease of Tomato

Mostafa

Alamri

Alrumman

et al. 2021

Plants

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“…The most common species were A. niger, A. flavus, A. terreus, A. nidulans, A. alternata, Cladosporium herbarum, and F. oxysporum. Another study was conducted to detect wheat seed-borne mycoflora from 14 Egyptian wheat cultivars by Baka [11]. The most frequent fungi were A. flavus, A. niger, A. alternata, and F. verticillioides.…”

Section: Introductionmentioning

confidence: 99%

Biodiversity of Pathogenic and Toxigenic Seed-Borne Mycoflora of Wheat in Egypt and Their Correlations with Weather Variables

Shabana

Rashad

Ghoneem

et al. 2021

Biology

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Surveillance investigations for pathogenic and toxigenic fungi are important to refine our understanding of their epidemiology and help in predicting their outbreaks. During 2019, 198 samples of wheat grains were collected from 25 wheat-growing governorates in Egypt to detect and identify seed-borne mycoflora in vitro. Forty-four fungal species belonging to 20 genera were identified. Molecular data for these fungi were analyzed to construct a phylogenetic tree. Occurrence and biodiversity indicators were calculated. Two prevalent pathogens (average incidence > 40%) were Alternaria alternata and Cladosporium spp. Ustilago tritici was present in only seven of the 25 governorates, and less abundant than Tilletia tritici, the causal agent of stinking smut. Sinai governorate recorded the greatest species diversity, while the greatest species richness was in Qena and Sohag governorates. Canonical correspondence analysis of data for 20 fungal genera with temperature, relative humidity, precipitation, wind speed or solar radiation revealed that relative humidity was the most influential weather variable. It showed that occurrence and distribution of the 20 genera corresponded well with three out of four Egyptian climatic regions: Mediterranean, semi-arid, and arid. Knowing pathogen occurrence and distribution in Egypt is the first step to developing future disease management strategies to limit yield losses and improve food security. Despite this study being conducted on the wheat-growing areas in Egypt, our findings are useful for other wheat-growing countries that share the same climatic conditions. The correlation between a given fungus and the climatic variables can be useful in other ecosystems.

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“…It could be that the AHL signaling system is a promising target for developing novel approaches to control bacterial infections. Recently, some chemicals were found to act as AHL antagonists and inhibit bacterial QS (Cotar 2013;Mohamed 2014). The known small chemicals with QS inhibition activity were grouped into two categories according to their structures and functions.…”

Section: Introductionmentioning

confidence: 99%

“…In view of the bacterial dependence on QS for the infection of hosts, it makes good evolutionary sense that eukaryotes have acquired the ability to recognise and respond to bacterial QS signals (Smith and Iglewski 2003) and the ability to actively interfere with bacterial QS through the production of compounds that mimic or inhibit the bacterial signals (Bauer and Teplitski 2001). Plants have been shown to produce secondary metabolites (Zare et al 2012;Mohamed 2014) and plants also produce AHL mimic compounds, possibly to manipulate the microbial rhizosphere population (Tolmacheva et al 2014). Seedlings of various plant species and exudates from pea (Pisum sativum L.) seedling induce swarming in Serratia liquefaciens (Grimes and Hennerty 1931) and activate several AHL reporter systems, in addition to inhibiting QS-regulated phenotypes in Chromobacterium violaceum (Schröter 1872) (Teplitski et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Signaling molecules from Lactuca sativa L. induced quorum sensing phenotypes in bacteria

Mahmoudi

2015

Journal of Plant Protection Research

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The outcome of the present investigation revealed that lettuce (Lactuca sativa L.) extract strongly interferes with acyl homoserine lactone (AHL) regulated physiological functions in the bioreporter strain, Chromobacterium violaceum CV026. Extracts of L. sativa also promoted production of virulence factors in plant pathogen, Pectobacterium carotovorum, and significantly increased tissue maceration on potato tubers when there was a low concentration (103 cfu · ml−1) of the bacterium was used. The thin layer chromatogram which visualised with AHL bioreporter strain, CV026, showed that L. sativa extract produced a circular spot with a diffuse edge tail and migrated with the same mobility as standard N-hexanoyl-L-homoserine lactone (C6-HSL). Gas Chromatography Mass Spectroscopy (GC-MS) analysis of the lettuce extract resulted in the identification of 19 compounds of which homoserine was identified for the first time in plants. Homoserine accounted for 2.37% of the total constituents. It is a new finding that lettuce contains AHL like substances (homoserine) which excite AHL related quorum sensing (QS) in bacteria.

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Plant Extract Control of the Fungi Associated with Different Egyptian Wheat Cultivars Grains

Abstract: Grain samples of 14 Egyptian wheat cultivars were tested for seed-borne fungi. The deep freezing method was used.

Cited by 23 publications

References 29 publications

Green Synthesis of Silver Nanoparticles Using Pomegranate and Orange Peel Extracts and Their Antifungal Activity against Alternaria solani, the Causal Agent of Early Blight Disease of Tomato

Green Synthesis of Silver Nanoparticles Using Pomegranate and Orange Peel Extracts and Their Antifungal Activity against Alternaria solani, the Causal Agent of Early Blight Disease of Tomato

Biodiversity of Pathogenic and Toxigenic Seed-Borne Mycoflora of Wheat in Egypt and Their Correlations with Weather Variables

Signaling molecules from Lactuca sativa L. induced quorum sensing phenotypes in bacteria

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