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  • 1
    Online Resource
    Online Resource
    Environmental and Stress Analysis of Wild Plant Habitat in River Nile Region of Dakahlia Governorate on Basis of Geospatial Techniques
    MDPI AG ; 2021
    In:  Sustainability Vol. 13, No. 11 ( 2021-06-03), p. 6377-
    Details
    In: Sustainability, MDPI AG, Vol. 13, No. 11 ( 2021-06-03), p. 6377-
    Abstract: Spatiotemporal environmental changes lead to disturbances in wild plant habitats, particularly in regions characterized by changeable land use and cover. The present study aims to characterize wild plant habitats in the River Nile region of Dakahlia Governorate using a multidisciplinary approach, incorporating remote sensing, GIS and sampling analyses. Twenty-four stands representing the wild plant habitats in the River Nile region were geographically identified, sampled and analyzed. Water and soil samples were investigated for physical and chemical characteristics. Two calibrated multispectral Landsat images dated 1999 and 2019 were processed to produce LULC, NDSI, NDMI and NDSI to characterize wild plan habitats. The floristic composition showed the presence of 64 species belonging to 53 genera and 28 families. Ecologically, the recorded plant species in the present work can be classified into four main categories, which are separated into three communities according to the TWINSPAN classification. Results showed that the annual loss of agricultural lands (3.98 km2) is closely relevant to the annual expansion of urban areas (4.24 km2). Although the uncontrolled urban sprawl caused loss of agricultural lands, it leads to the expansion of wild plant habitats, represented mainly by the sparse class and partially by the moderately dense class as obtained from NDVI. The increase in mean values of the moisture (NDMI) from 0.034 in 1999 to 0.64 in 2019 may have arisen from the increase in total areas of wild plant habitats during the investigated period (1999–2019). This might increase the suitability of conditions for wild habitats which induces the proliferation of natural plants.
    Type of Medium: Online Resource
    ISSN: 2071-1050
    URL: Article
    DOI: 10.3390/su13116377
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2518383-7
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  • 2
    Online Resource
    Online Resource
    Euphorbia retusa (Forssk.) A PROMISING SOURCE FOR BIOACTIVE COMPOUNDS IN BIOMEDICAL AND AGRICULTURE APPLICATIONS
    Research Floor ; 2021
    In:  PLANT ARCHIVES Vol. 21, No. no 1 ( 2021-4-19)
    Details
    In: PLANT ARCHIVES, Research Floor, Vol. 21, No. no 1 ( 2021-4-19)
    Abstract: Euphorbia retusa (family Euphorbiaceae) is an annual plant in the desert of Egypt with a 20 to 60 cm high. The aerial part of the plant containing latex is used in many biological activities. This study aimed to determine the phytochemical constituents, antioxidant, antimicrobial properties and allelopathic activities of aerial parts of E. retusa collected from Wadi Arabah, North Eastern Desert, Egypt. Standard methods were used for the qualitative and quantitative of tannins, saponins, flavonoids, alkaloid, phenolics, steroids, terpenoids, and glycosides. The antioxidant activity was measured based on the reduction of DPPH.Antimicrobial activity was evaluated against pathogenic bacteria, as well as the allelopathic potential against Chenopodium murale was assayed. E. retusa attained the highest values of saponins, tannins, and phenolics compared. In the DPPH test system, the IC50 value of the antioxidant inhibition for E. retusa was 802.74µg mL-1. The data obtained indicated that, the sensitivity of the seedling growth to the extract was higher than the germination of the test species. In addition, the root growth of C. murale was more affected than the shoot system to the inhibitory allelopathic activity induced by E. retusa. At higher concentration (40 g L-1) the germination of the tested seed was highly inhibited by 51.77%, while the shoot and root were reduced by 60.98% and 74.55%, respectively. However, the opposite response was observed at the lower concentration (2.5 g L-1).In conclusion, theextract of E. retusa plant has phytotoxic properties and thus contains phytotoxic substances
    Type of Medium: Online Resource
    ISSN: 2581-6063 , 0972-5210
    URL: Article
    DOI: 10.51470/PLANTARCHIVES.2021.v21.no1.004
    Language: Unknown
    Publisher: Research Floor
    Publication Date: 2021
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  • 3
    Online Resource
    Online Resource
    Chemical Profiling of Significant Antioxidant and Phytotoxic Microwave-Extracted Essential Oil from Araucaria heterophylla Resin
    MDPI AG ; 2023
    In:  Separations Vol. 10, No. 2 ( 2023-02-18), p. 141-
    Details
    In: Separations, MDPI AG, Vol. 10, No. 2 ( 2023-02-18), p. 141-
    Abstract: Due to the various hazards of using synthetic chemical compounds in pharmaceutics, agriculture, and industry, scientists and researchers do their best to explore and assess new green natural compounds from natural resources with potent activity. The essential oil (EO) from the resin collected from Araucaria heterophylla Salisb. was extracted by the microwave technique and chemically characterized via GC-MS analysis. Furthermore, the extract EO was assessed for its antioxidant and phytotoxic activities. The EO has 33 compounds, mainly terpenes (98.23%), and the major compounds were α-pinene (62.57%), β-pinene (6.60%), germacrene D (5.88%), and β-caryophyllene (3.56%). The extracted EO showed substantial antioxidant activity, where it showed IC50 values of 142.42 and 118.03 mg L−1 for DPPH and ABTS, respectively. On the other hand, the EO revealed considerable phytotoxicity against the weed Chenopodium murale, where the EO showed IC50 values of 304.0, 230.1, and 147.1 mg L−1, for seed germination, seedling shoot growth, and seedling root growth, respectively. Moreover, the EO showed the same pattern of allelopathic inhibition against the weed Sonchus oleraceus, where it showed IC50 values of 295.7, 224.5, and 106.1 mg L−1, for seed germination, seedling shoot growth, and seedling root growth, respectively. The present study showed that the extraction technique affects the constituents of the EO, particularly the quantitative composition. The EO of A. heterophylla resin also revealed considerable antioxidant and phytotoxic activity against weeds. Therefore, it can be considered a promising natural resource that could be integrated into the weed management approach. However, further study is recommended for deep characterization of their authentic compounds and evaluation of their mode of action(s) on a wide spectrum of weeds.
    Type of Medium: Online Resource
    ISSN: 2297-8739
    URL: Article
    DOI: 10.3390/separations10020141
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2869930-0
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  • 4
    Online Resource
    Online Resource
    Wild Plant Habitat Characterization in the Last Two Decades in the Nile Delta Coastal Region of Egypt
    MDPI AG ; 2022
    In:  Agriculture Vol. 12, No. 1 ( 2022-01-13), p. 108-
    Details
    In: Agriculture, MDPI AG, Vol. 12, No. 1 ( 2022-01-13), p. 108-
    Abstract: Environmental and land-use changes put severe pressure on wild plant habitats. The present study aims to assess the biodiversity of wild plant habitats and the associated spatiotemporal environmental changes in the coastal region of Dakahlia Governorate following an integrated approach of remote sensing, GIS, and samples analysis. Thirty-seven stands were spatially identified and studied to represent the different habitats of wild plants in the Deltaic Mediterranean coastline region. Physical and chemical characteristics of soil samples were examined, while TWINSPAN classification was used to identify plant communities. Two free Landsat images (TM and OLI) acquired in 1999 and 2019 were processed to assess changes via the production of land use and cover maps (LULC). Moreover, NDSI, NDMI, and NDSI indices were used to identify wild plant habitats. The floristic composition indicated the existence of 57 species, belonging to 51 genera of 20 families. The largest families were Asteraceae, Poaceae, and Chenopodiaceae. The classification of vegetation led to the identification of four groups. Canonical Correspondence Analysis (CCA) revealed that electrical conductivity, cations, organic carbon, porosity, chlorides, and bicarbonates are the most effective soil variables influencing vegetation. The results of the spectral analysis indicated an annual coverage of bare lands (3.56 km2), which is strongly related to the annual increase in vegetation (1.91 km2), water bodies (1.22 km2), and urban areas (0.43 km2). The expansion of urban and agricultural regions subsequently increased water bodies and caused occupancy of bare land, resulting in the development of wild plant habitats, which are mostly represented by the sparse vegetation class as evaluated by NDVI. The increase in mean moisture values (NDMI) from 0.03 in 1999 to 0.15 in 2019 might be explained by the increase in total areas of wild plant habitats throughout the study period (1999–2019). This may improve the adequacy of environments for wild habitats, causing natural plant proliferation.
    Type of Medium: Online Resource
    ISSN: 2077-0472
    URL: Article
    DOI: 10.3390/agriculture12010108
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2651678-0
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  • 5
    Online Resource
    Online Resource
    Proximate Composition, Mineral Content and Secondary Metabolites of Three Medicinal Wild Fagonia Species
    Update Publishing House ; 2020
    In:  Food Biology ( 2020-08-29), p. 1-6
    Details
    In: Food Biology, Update Publishing House, ( 2020-08-29), p. 1-6
    Abstract: Proximate composition of the aerial parts of three Fagonia species (Fagonia arabica L., F. mollis Delile and F. cretica L.) collected from different habitats were analyzed. Macro- and micro-elements as well as some secondary metabolites were estimated. The obtained results revealed that F. creticus contains appreciable levels of nutritive components considering that its nutritional value (351.06 kcal/100g dry wt.) was remarkably higher than that of F. arabica and F. mollis (327.99 and 293.07 kcal/100g dry wt., respectively). The concentration of Na was relatively the highest among the other estimated macroelements in the studied species followed by K, Ca and Mg, respectively while Fe was the highest microelement followed by Cu, Mn and Zn, respectively. The phytochemical composition revealed that methanolic extract of F. creticus was the richest in total alkaloids and flavonoids, while F. arabica found to be the richest in total phenolics and tannins.
    Type of Medium: Online Resource
    ISSN: 2249-4790
    URL: Article
    DOI: 10.25081/fb.0.v0.6290
    Language: Unknown
    Publisher: Update Publishing House
    Publication Date: 2020
    detail.hit.zdb_id: 2923891-2
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  • 6
    Online Resource
    Online Resource
    Bioactive constituents and allelopathic activities of the invasive weed Ranunculus sceleratus L. Nile Delta, Egypt
    Update Publishing House ; 2020
    In:  Journal of Experimental Sciences ( 2020-04-22), p. 1-4
    Details
    In: Journal of Experimental Sciences, Update Publishing House, ( 2020-04-22), p. 1-4
    Abstract: Ranunculus sceleratus L. (celery-leaved buttercup) is a herbaceous plant grows in wet and moist habitats and is native to temperate and boreal North America and Eurasia. Moreover, it is listed as an invasive weed in northern Africa, Europe and Asia. This study aimed to determine some secondary products in R. sceleratus (Shoot and Root system) collected from canal banks of drains, Nile Delta, Egypt and to demonstrate their antioxidant and allelopathic potential. Results revealed that, methanolic extract of R. sceleratus rich in phenols, saponins and tannins. The antioxidant activity of the R. sceleratus has IC50 value of 0.37 mg/ml and 0.34 mg/ml for shoot and root, respectively, compared to 0.15 mg/ml for catechol. At 400 mg/ml, Chenopodium murale germination was inhibited by 79.74% and 92.64 for shoot and root extract, respectively, compared to control. However, the shoot growth was reduced by 76.06 % and 87.96 %, with the same sequence. The root growth was more sensitive to the allelopathic effect compared to the shoot, where it was inhibited by 82.68% and 98.67%, respectively, compared to control at the highest concentration. The obtained results on this invisive weed R. sceleratus could be a source of eco-friendly bioherbicides against C. murale and as a source of antioxidants.
    Type of Medium: Online Resource
    ISSN: 2218-1768
    URL: Article
    DOI: 10.25081/jes.2020.v11.6035
    Language: Unknown
    Publisher: Update Publishing House
    Publication Date: 2020
    detail.hit.zdb_id: 2953326-0
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  • 7
    Online Resource
    Online Resource
    Chemical composition variations, allelopathic, and antioxidant activities of Symphyotrichum squamatum (Spreng.) Nesom essential oils growing in heterogeneous habitats
    Elsevier BV ; 2020
    In:  Arabian Journal of Chemistry Vol. 13, No. 2 ( 2020-02), p. 4237-4245
    Details
    In: Arabian Journal of Chemistry, Elsevier BV, Vol. 13, No. 2 ( 2020-02), p. 4237-4245
    Type of Medium: Online Resource
    ISSN: 1878-5352
    URL: Article
    DOI: 10.1016/j.arabjc.2019.07.005
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2020
    detail.hit.zdb_id: 2515214-2
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  • 8
    Online Resource
    Online Resource
    Rosemary and neem methanolic extract: antioxidant, cytotoxic, and larvicidal activities supported by chemical composition and molecular docking simulations
    Frontiers Media SA ; 2023
    In:  Frontiers in Plant Science Vol. 14 ( 2023-5-18)
    Details
    In: Frontiers in Plant Science, Frontiers Media SA, Vol. 14 ( 2023-5-18)
    Abstract: This study aimed to employ GC–MS to assess the chemical composition of MeOH leaf extracts of R. officinalis and A. indica and evaluate their insecticidal, antioxidant, and antibacterial activities. Twelve components, representing 98.61% and 100% of the total volatile compounds, were deduced from the extracted R. officinalis and A. indica , respectively, using this method. In R. officinalis extract, limonene is typically positioned as the main component (23.03%), while the main chemicals identified in A. indica extract were methyl (E)-octadec-13-enoate (23.20%) and (2R)-1,3,8-trimethyl-4-propyl-5-ethyl-2-(1-hydroxyethyl)-7-methoxycardonylethyl-6-methylenecarbonyl-porphyrin (23.03%). Both extracts of R. officinalis and A. indica exhibited different toxicity against the stored grain pest T. castaneum , with LC 50 values of 1.470 and 2.588 mg/ml, respectively. Additionally, after 4 and 5 h of treatment at a concentration of 0.2 mg/ml, the A. indica extract showed the highest levels of repellent action (81.4% and 93.4%), and the R. officinalis extract showed a good repellent rate (64.9% and 80.7%) against T. castenum larvae. With an IC 50 value of 35.83 and 28.68 mg/L and a radical scavenging activity percentage of 67.76% and 72.35%, the leaf extract was found to be the most potent plant extract when tested for DPPH antioxidant activity. Overall results showed that MeOH extracts of R. officinalis and A. indica were more effective against S. aureus than E. coli . To determine how the investigated chemicals attach to the active sites of E. coli DNA gyrase A and S . aureus undecaprenyl diphosphate synthase, docking studies were carried out. The consensus score analysis showed that limonene exhibits the best binding energy with both enzymes in docking analysis and more stability in molecular dynamics simulations. The RMSD was obtained at 20.6 and 4.199 (Kcal/mole). The two compounds were successfully used in molecular dynamics simulation research to generate stable complexes with DNA gyrase A.
    Type of Medium: Online Resource
    ISSN: 1664-462X
    URL: Article
    DOI: 10.3389/fpls.2023.1155698
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2023
    detail.hit.zdb_id: 2687947-5
    detail.hit.zdb_id: 2613694-6
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  • 9
    Online Resource
    Online Resource
    Soil quality and health risk assessment of heavy metals in agricultural areas irrigated with wastewater from Kitchener Drain, Nile Delta, Egypt
    Update Publishing House ; 2017
    In:  Journal of Scientific Agriculture Vol. 1 ( 2017-06-20), p. 158-
    Details
    In: Journal of Scientific Agriculture, Update Publishing House, Vol. 1 ( 2017-06-20), p. 158-
    Abstract: Kitchener drain is one of the largest drains in Nile Delta. It discharges water directly into Mediterranean Sea water affecting on the marine environment. Local population uses its water in irrigation and agriculture field along this drain. So it’s important to determine heavy metal content of agricultural soils used this water in irrigation process and assess the hazard and cancer risk on human health living in these areas. Six metals (Fe, Cd, Pb, Ni, Cr and Co) in total and available form were determined in eight geo-referenced soil samples. The order of these metals in soil was as follow; Ni 〉 Cr 〉 Fe 〉 Pb 〉 Cd 〉 Co. The order of these metals in the available form take the sequence of; Fe 〉 Ni 〉 Pb 〉 Cr 〉 Cd 〉 Co.  All mean concentrations of metals were exceeding the standard limits of EU, CSQG and AUEC except for cobalt. Mean values of enrichment factors of metals give an indication that the sources of these metals in the environment were from anthropogenic activities. PLI and DC showed considerable degree of contamination in sites 4 & 5. While it showed high degree of contamination in other sites. Hazard quotient from different exposure pathways namely; chemical daily intake (CDI), Dermal contact (DAD) and inhalation (ECinh) and hazard index calculations from metals within different sites were more than one, indicated that there is a chance of non-carcinogenic effects to occur. Also from these pathways, cancer risk (CR) was calculated, which exceed from dermal contact, followed by ingestion and finally from inhalation. Only CR of cobalt showed no risk in the study area when compared with other metals
    Type of Medium: Online Resource
    ISSN: 2184-0261
    URL: Article
    DOI: 10.25081/jsa.2017.v1.50
    Language: Unknown
    Publisher: Update Publishing House
    Publication Date: 2017
    detail.hit.zdb_id: 2953359-4
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  • 10
    Online Resource
    Online Resource
    Land use/cover and eco-toxicity indices for identifying metal contamination in sediments of drains, Manzala Lake, Egypt
    Elsevier BV ; 2020
    In:  Heliyon Vol. 6, No. 1 ( 2020-01), p. e03177-
    Details
    In: Heliyon, Elsevier BV, Vol. 6, No. 1 ( 2020-01), p. e03177-
    Type of Medium: Online Resource
    ISSN: 2405-8440
    URL: Article
    DOI: 10.1016/j.heliyon.2020.e03177
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2020
    detail.hit.zdb_id: 2835763-2
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