Amal Alyamani

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Synergistic Modulation of Seed Metabolites and Enzymatic Antioxidants Tweaks Moisture Stress Tolerance in Non-Cultivated Traditional Rice Genotypes during Germination

Plants (2022)

Asish Kanakaraj Binodh Sugitha Thankappan Anupriya Ravichandran Debasis Mitra A. Senthil

Traditional rice landraces are treasures for novel genes to develop climate-resilient cultivars. Seed viability and germination determine rice productivity under moisture stress. The present study evaluated 100 rice genotypes, including 85 traditional landraces and 15 improved cultivars from various agro-ecological zones of Tamil Nadu, along with moisture-stress-susceptible (IR 64) and moisture-stress-tolerant (IR 64 Drt1) checks. The landraces were screened over a range of osmotic potentials, namely (-) 1.0 MPa, (-) 1.25 MPa and (-) 1.5 MPa, for a period of 5 days in PEG-induced moisture stress. Physio-morphological traits, such as rate of germination, root and shoot length, vigor index, R/S ratio and relative water content (RWC), were assessed during early moisture stress at the maximum OP of (-) 1.5 MPa. The seed macromolecules, phytohormones (giberellic acid, auxin (IAA), cytokinin and abscisic acid), osmolytes and enzymatic antioxidants (catalase and superoxide dismutase) varied significantly between moisture stress and control treatments. The genotype Kuliyadichan registered more IAA and giberellic acid (44% and 35%, respectively, over moisture-stress-tolerant check (IR 64 Drt1), whereas all the landraces showed an elevated catalase activity, thus indicating that the tolerant landraces effectively eliminate oxidative damages. High-performance liquid chromatography analysis showed a reduction in cytokinin and an increase in ABA level under induced moisture stress. Hence, the inherent moisture-stress tolerance of six traditional landraces, such as Kuliyadichan, Rajalakshmi, Sahbhagi Dhan, Nootripathu, Chandaikar and Mallikar, was associated with metabolic responses, such as activation of hydrolytic enzymes, hormonal crosstalk, ROS signaling and antioxidant enzymes (especially catalase), when compared to the susceptible check, IR 64. Hence, these traditional rice landraces can serve as potential donors for introgression or pyramiding moisture-stress-tolerance traits toward developing climate-resilient rice cultivars.

Moisture stress

Zeatin

Drought Tolerance

10.3390/plants11060775

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Citations (8)

Gamma Irradiation Assisted the Sol–Gel Method for Silver Modified-Nickel Molybdate Nanoparticles Synthesis: Unveiling the Antimicrobial, and Antibiofilm Activities Against Some Pathogenic Microbes

Journal of Inorganic and Organometallic Polymers and Materials (2021)

M. I. A. Abdel Maksoud Gharieb S. El‐Sayyad Eman Fayad Amal Alyamani Ola A. Abu Ali

Silver nanoparticle

10.1007/s10904-021-02132-9

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Citations (24)

Effect of Pinching and Paclobutrazol on Growth, Flowering, Chemical Constituents, and Histological Features ofTecoma capensis(Thunb.) Lindl

Science of Advanced Materials (2022)

Y. F. Y. Mohamed Reda M. Y. Zewail Rokayya Sami Amina A. M. Al-Mushhin Amal Alyamani

This work aimed to evaluate pinching and paclobutrazol effects on potted Tecoma capensis (Thunb.) Lindl plant growth, flowering, and chemical composition. Assessed the growth, flowering, and chemical characteristics of Tecoma capensis transplants treated with and without pinching and paclobutrazol foliar spray (0, 75, 150, and 200 mg/l). Pinching and paclobutrazol treatments, and particularly the combined treatment of 200 mg/l paclobutrazol with pinching, reduced plant height and improved branch growth and root parameters. After 150 days, leaf midrib anatomy measurements increased significantly with the application of 200 mg/l paclobutrazol and pinching compared to the controls. The highest flower numbers, flower fresh and dry weight, and show value were achieved with the combination treatment of pinching and 200 mg/l paclobutrazoL. In addition, leaf nitrogen, Phosphorus, potassium, total carbohydrates, total chlorophyll, and leaf phenol contents were statistically increased by the interaction between pinching and 200 mg/l paclobutrazol. Moreover, applications of paclobutrazol at 150 mg/l with pinching and 200 mg/l without pinching significantly increased all aforementioned parameters. Pinching and paclobutrazol treatments were effective for achieving desired growth patterns in Tecoma capensis plants, particularly with paclobutrazol concentrations of 200 mg/l.

Paclobutrazol

Dry weight

10.1166/sam.2022.4222

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Citations (0)

Upgrading Common Wheat Pasta by Fiber-Rich Fraction of Potato Peel Byproduct at Different Particle Sizes: Effects on Physicochemical, Thermal, and Sensory Properties

Molecules (2022)

Mohammad Namir Ali Iskander Amal Alyamani Eman T. Abou Sayed-Ahmed Ahmed M. Saad

Fiber-enriched food has numerous health benefits. This study develops functional fiber-enriched pasta (FEP) by partially substituting wheat flour for alcohol-insoluble residue prepared from potato peel byproducts (AIR-PPB) at various particle sizes (PS). The independent variables’ effects, AIR-PPB at 2–15% substitution levels, and PS 40–250 µm were investigated in terms of chemical, cooking, thermal, and sensory properties. AIR-PPB is rich in total dietary fibers (TDF) (83%), exhibiting high water-holding capacity (WHC) and vibrant colors. Different concentrations of AIR-PPB increase TDF content in FEPs by 7–21 times compared to the control pasta (CP). Although the optimal cooking time (OCT) decreases by 15–18% compared to CP, where a lower OCT should reduce cooking time and save energy, cooking loss (Cl) increases slightly but remains within an acceptable range of 8%. Additionally, AIR-PPB altered the texture properties of FEP, with a moderate decrease in mass increase index (MII), firmness, and stickiness. AIR-PPB impairs the gluten network’s structure in pasta due to AIR-PPB’s WHC, which competes with starch for water binding, increasing the starch gelatinization temperature. FEPs show an increased lightness and yellowness and improved sensory properties. Highly acceptable FEPs were obtained for the following substitution levels: FEP11 (AIR-PPB at 2% and PS of 145 µm), FEP9 (AIR-PPB 4% level with PS of 70 µm), FEP6 (AIR-PPB of 4% level with 219 µm PS), and FEP1 (AIR-PPB = 8.5% with 40 µm PS), as compared to other FEPs.

10.3390/molecules27092868

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Citations (17)

Cultural and diversity considerations in psychological testing in the Arabian Gulf region

Journal of Psychology & Psychotherapy (2017)

Amal Alyamani Maysaa Wael Buraik

Source

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Citations (0)

Morphologic and Molecular Evaluation of Papaya Strains (Carica papaya L.) Under Mediterranean Conditions

Journal of Biobased Materials and Bioenergy (2022)

K. Hassan M. M. A. Abd-Elkawy Rokayya Sami Luluah M. Al Masoudi Amal Alyamani

Papaya is high in nutrients, delicious flavours, and potent antioxidants like lycopene; all of these bio constituents may reduce the risk of a variety of ailments, particularly those associated with ageing, such as heart disease and cancer. The papaya ( Carica papaya L.) despite having a lengthy farming history and important germplasm, little is known about its genetic basis and variety. In response to environmental changes, the results of papaya strain diversity show variation in yield, vegetative traits, morphological characteristics of flowers, fruits, and leaves. To characterise the genetic assessment, morphological, agronomical traits, and an inter-simple sequence repeat (ISSR) molecular marker were studied across 9 papaya strains. For the past three decades, DNA Molecular markers have been used. The DNA contours provide data on the strains, display the entire genome, and showing difference in both the encrypting and non-encrypting regions, as well as polymorphism. A mix of morphologic, chemical, and molecular characteristics of papaya strains can be used to well measure the degree of variety and correlation among papaya strains. The primers UBC812 and UBC825 performed the best for identifying and estimating the diversity of papaya accessions, followed by UBC864, UBC809, UBC811 and HB-13. The 9 papaya strains were classified into two clusters using UPGMA cluster analysis and a similarity coefficient obtained from ISSR markers. Among the nine papaya strains, the pair S3 and S7 had the highest similarity (0.97). The morphological characteristics are similar to molecular analysis. This work provided a quick and steadfast method for estimating variability among different Papaya strains, which breeders could use to improve papaya.

Carica

UPGMA

Germ plasm

Genetic Variability

Molecular marker

10.1166/jbmb.2022.2175

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Citations (2)

Well-Orientation Strategy Biosynthesis of Cefuroxime-Silver Nanoantibiotic for Reinforced Biodentine™ and Its Dental Application against Streptococcus mutans

Molecules (2021)

Sanaa M. F. Gad El-Rab Amal Adnan Ashour Sakeenabi Basha Amal Alyamani Nayef H. Felemban

Dental caries results from the bacterial pathogen

Cefuroxime

Silver nanoparticle

10.3390/molecules26226832

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Citations (6)

Influence of the Extraction Solvent and of the Altitude on the Anticancer Activity of Lebanese Eucalyptus camaldulensis Extract Alone or in Combination with Low Dose of Cisplatin in A549 Human Lung Adenocarcinoma Cells

Processes (2022)

Mohamad Nasser Amal Alyamani Anis Daou Malak Nasser Zahraa Saad

Background: Lung cancer is the second most common cancer worldwide. Eucalyptus plant extract has been shown to have anti-neoplastic effects. We investigated the antitumor effect of ethanolic and aqueous extracts of Eucalyptus camaldulensis collected at different altitudes on A549. In addition, we evaluated the additive effect of its combination with low-dose cisplatin (CDDP). Methods: Qualitative and quantitative analyses of secondary metabolites present in the plants were carried out. The antioxidant and cytotoxic activities of the different extracts on A549 were evaluated using the 2.2-diphenyl-1-picrylhydrazyl radical scavenging activity and neutral red assay, respectively. The cytotoxic effect of the combination of certain extract concentrations with low-dose CDDP on A549 cells was studied. Results: In the Ethanoic extract, a higher number of active substances and antioxidant activities were observed. The four E. camaldulensis extracts showed cytotoxic activity on A549 cells, with a higher cytotoxicity for the Ethanoic extract and the sea-level altitude species. Moreover, the dual exposure of cells to both E. camaldulensis extracts and a low dose of Cisplatin showed an additional cytotoxic effect on A549 cells in certain concentrations. Conclusions: This study opens novel therapeutic options in combinational therapies of Eucalyptus camaldulensis with low-dose CDDP for the treatment of adenocarcinoma cells of human lungs.

Eucalyptus camaldulensis

MTT assay

10.3390/pr10081461

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Citations (3)

Comparative Analysis of Nanosilver Particles Synthesized by Different Approaches and Their Antimicrobial Efficacy

Journal of Nanomaterials (2021)

Hala M. Abdelmigid Maissa M. Morsi Nahed Ahmed Hussien Amal Alyamani Noha Moslah Al Sufyani

Silver nanoparticles (AgNPs) were extensively used in different fields worldwide. There is a continued increase in their productions to fulfill various uses. Biological and chemical AgNP syntheses were the most popular mechanisms in this field. Agrowastes are rich in proteins, phenolics, and flavonoids that could act as bioreductant agents in AgNP biological synthesis. The present study was aimed at synthesizing AgNPs via chemical and biological methods using trisodium citrate, pomegranate fruit peel, and coffee ground waste extracts. Moreover, silver nanoparticles were monitored by UV-vis spectroscopy and characterized using zeta potential, size distribution mean, scanning electron microscope (SEM), X-ray diffractometer (XRD), and Fourier transforms infrared spectroscopy (FTIR). Four pathogenic bacterial strains (Enterobacter aerogenes, Klebsiella pneumoniae, Pseudomonas aeruginosa, and MRSA) were used to assess the antimicrobial effect of the synthesized AgNPs (2, 4, and 8 mg/ml). Results report the successful formation of silver nanoparticles chemically (AgNPs_Chem) and biologically by using pomegranate peel extract (AgNPs_PPE) and coffee ground waste extract (AgNPs_CE) due to the change of color to dark brown that is confirmed by UV-vis sharp absorption spectra at specific wavelengths. Characterization using SEM and XRD revealed their crystalline shape with a mean size of

AgNPs_Chem = 62.75

AgNPs_CE = 273.7 nm

, and

AgNPs_PPE = 591.9 nm

. AgNPs_Chem show higher negativity of zeta potential (−46.7 mV) than AgNPs_CE (−12.6 mV), followed by AgNPs_PPE (−7.98 mV), which had the least stability. All the synthesized AgNPs show antimicrobial potential on all selected strains. However, 8 mg/ml shows the most effective concentration and has more efficiency on K. pneumoniae than others. Overall, the results highlight that the use of agrowastes could be an ecofriendly way to synthesize AgNPs biologically that have the same antimicrobial effect as the chemically synthesized AgNPs.

Silver nanoparticle

Zeta potential

Enterobacter aerogenes

Trisodium citrate

Diffractometer

10.1155/2021/2204776

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Citations (27)

Green Synthesized of Thymus vulgaris Chitosan Nanoparticles Induce Relative WRKY-Genes Expression in Solanum lycopersicum against Fusarium solani, the Causal Agent of Root Rot Disease

Plants (2022)

Sawsan Abd-Ellatif Amira A. Ibrahim Fatmah Ahmed Safhi Elsayed S. Abdel Razik Sanaa S. A. Kabeil

Fusarium solani is a plant pathogenic fungus that causes tomato root rot disease and yield losses in tomato production. The current study's main goal is testing the antibacterial efficacy of chitosan nanoparticles loaded with Thyme vulgaris essential oil (ThE-CsNPs) against F. solani in vitro and in vivo. GC-MS analysis was used to determine the chemical constituents of thyme EO. ThE-CsNPs were investigated using transmission electron microscopy before being physicochemically characterized using FT-IR. ThE-CsNPs were tested for antifungal activity against F. solani mycelial growth in vitro. A pot trial was conducted to determine the most effective dose of ThE-CsNPs on the morph/physiological characteristics of Solanum lycopersicum, as well as the severity of fusarium root rot. The relative gene expression of WRKY transcript factors and defense-associated genes were quantified in root tissues under all treatment conditions. In vitro results revealed that ThE-CsNPs (1%) had potent antifungal efficacy against F. solani radial mycelium growth. The expression of three WRKY transcription factors and three tomato defense-related genes was upregulated. Total phenolic, flavonoid content, and antioxidant enzyme activity were all increased. The outfindings of this study strongly suggested the use of ThE-CsNPs in controlling fusarium root rot on tomatoes; however, other experiments remain necessary before they are recommended.

Fusarium solani

Root rot

WRKY protein domain

Pathogenic fungus

10.3390/plants11223129

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Citations (18)