Hamada AbdElgawad

University of Antwerp

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Gerrit T.S. Beemster

University of Antwerp

Samy Selim

Al Jouf University

Han Asard

University of Antwerp

Mohammad K. Okla

King Saud University

Mostafa A. Abdel-Maksoud

King Saud University

Mohammad K. Okla

King Saud University

Ahmed M. Saleh

Taibah University

Emad A. Alsherif

Beni-Suef University

Shereen Magdy Korany

Princess Nourah bint Abdulrahman University

Gaurav Zinta

Academy of Scientific and Innovative Research

Cooperative Institutions

University of Antwerp

121

King Saud University

Beni-Suef University

Universidade Estadual Paulista (Unesp)

University of Agriculture Faisalabad

The University of Agriculture, Peshawar

Quaid-i-Azam University

King Abdulaziz University

Government College University, Faisalabad

Cairo University

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Identification of potential 3CLpro inhibitors-modulators for human norovirus infections: An advanced virtual screening approach

Research Square (Research Square) (2023)

Shovonlal Bhowmick Tapan Kumar Mistri Mohammad K. Okla Ibrahim Saleh Hamada AbdElgawad

Abstract The present study aimed to screen small molecular compounds as the human noroviruses (HuNoV) inhibitors/modulators that could be potentially responsible for exhibiting some level of inhibitory activity against HuNoV 3CLPro. The structural similarity-based screening against ChEMBL database is performed against known chemical entities which are presently under pre-clinical trial. Molecules that remained after the similarity search were considered molecular docking using SCORCH and PLANTS. On detailed analyses and comparisons with control molecule, 3 hits (CHEMBL393820, CHEMBL2028556 and CHEMBL3747799) were found to be potential for HuNoV 3CLpro inhibition. The binding interaction analysis revealed several critical amino acids to hold the molecules tightly at the close proximity site of the catalytic residues. Further, three MD simulation study was performed in triplicate to understand the binding stability and potentiality of the proposed molecule towards HuNov 3CLpro. The binding free energy based on MM-GBSA has revealed their strong interaction affinity with 3CLpro.

Docking (animal)

10.21203/rs.3.rs-3614758/v1

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Mechanical property analysis of carbon-bamboo fiber–reinforced montmorillonite nanocomposite

The International Journal of Advanced Manufacturing Technology (2023)

T. Sathish Indradeep Kumar Manoharan Meena Enamuthu Hemalatha S. N. Padhi

Flexural modulus

10.1007/s00170-023-12813-z

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Insight into the phytochemical profile and antimicrobial activities of Amomum subulatum and Amomum xanthioides: an in vitro and in silico study

Frontiers in Plant Science (2023)

Mohammed H. Alruhaili Mohammed S. Almuhayawi Hattan S. Gattan Mohanned Talal Alharbi Mohammed K. Nagshabandi

Medicinal plants have been considered as potential source of therapeutics or as starting materials in drugs formulation.The current study aims to shed light on the therapeutic potential of the Amomum subulatom and Amomum xanthioides Fruits by analyzing the phytochemical composition of their seeds and fruits using gas chromatography-mass spectrometry (GC-MS) and high-performance liquid chromatography (HPLC) techniques to determine the presence of bioactive components such as flavonoids, phenols, vitamins, steroids, and essential oils.The protein content is usually higher than the total lipids in both species except the fruit of A. subulatum which contain more lipids than proteins. The total protein contents for A. subulatum were 235.03 ± 21.49 and 227.49 ± 25.82 mg/g dry weight while for A. xanthioides were 201.9 ± 37.79 and 294.99 ± 37.93 mg/g dry weight for seeds and fruit, respectively. The Carvacrol levels in A. subulatum is 20 times higher than that in A. xanthioides. Lower levels of α-Thujene, Phyllanderenes, Ascaridole, and Pinocarvone were also observed in both species. According to DPPH (2,2-diphenylpicrylhydrazyl) assay, seed the extract of A. subulatum exhibited the highest antioxidant activity (78.26±9.27 %) followed by the seed extract of A. xanthioides (68.21±2.56 %). Similarly, FRAP (Ferric Reducing Antioxidant Power) assay showed that the highest antioxidant activity was exhibited by the seed extract of the two species; 20.14±1.11 and 21.18±1.04 µmol trolox g-1 DW for A. subulatum and A. xanthioides, respectively. In terms of anti-lipid peroxidation, relatively higher values were obtained for the fruit extract of A. subulatum (6.08±0.35) and the seed extract of A. xanthioides (6.11±0.55). Ethanolic seed extracts of A. subulatum had the highest efficiency against four Gram-negative bacterial species which causes serious human diseases, namely Pseudomonas aeruginosa, Proteus vulgaris, Enterobacter aerogenes, and Salmonella typhimurium. In addition, P. aeruginosa was also inhibited by the fruit extract of both A. subulatum and A. xanthioides. For the seed extract of A. xanthioides, large inhibition zones were formed against P. vulgaris and the fungus Candida albicans. Finally, we have in silico explored the mode of action of these plants by performing detailed molecular modeling studies and showed that the antimicrobial activities of these plants could be attributed to the high binding affinity of their bioactive compounds to bind to the active sites of the sterol 14-alpha demethylase and the transcriptional regulator MvfR.These findings demonstrate the two species extracts possess high biological activities and therapeutical values, which increases their potential value in a number of therapeutic applications.

Phytochemical

Carvacrol

Dry weight

Trolox

10.3389/fpls.2023.1136961

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Physiological responses of the symbiotic shrimp Ancylocaris brevicarpalis and its host sea anemone Stichodactyla haddoni to ocean acidification

Marine Pollution Bulletin (2022)

Sanjeevi Prakash Amit Kumar Mohammad K. Okla ALhimadi Ahmad Zahid Khorshid Abbas

Sea anemone

Anemone

APX

10.1016/j.marpolbul.2021.113287

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Phosphorus stress strongly reduced plant physiological activity, but only temporarily, in a mesocosm experiment with <i>Zea mays</i> colonized by arbuscular mycorrhizal fungi

Biogeosciences (2022)

Melanie S. Verlinden Hamada AbdElgawad Arne Ven Lore T. Verryckt Sebastian Wieneke

Abstract. Phosphorus (P) is an essential macronutrient for plant growth and one of the least available nutrients in soil. P limitation is often a major constraint for plant growth globally. Although P addition experiments have been carried out to study the long-term effects on yield, data on P addition effects on seasonal variation in leaf-level photosynthesis are scarce. Arbuscular mycorrhizal fungi (AMF) can be of major importance for plant nutrient uptake, and AMF growth may be important for explaining temporal patterns in leaf physiology. In a nitrogen (N) and P fertilization experiment with Zea mays, we investigated the effect of P limitation on leaf pigments and leaf enzymes, how these relate to leaf-level photosynthesis, and how these relationships change during the growing season. A previous study on this experiment indicated that N availability was generally high, and as a consequence, N addition did not affect plant growth, and also the leaf measurements in the current study were unaffected by N addition. Contrary to N addition, P addition strongly influenced plant growth and leaf-level measurements. At low soil P availability, leaf-level photosynthetic and respiratory activity strongly decreased, and this was associated with reduced chlorophyll and photosynthetic enzymes. Contrary to the expected increase in P stress over time following gradual soil P depletion, plant P limitation decreased over time. For most leaf-level processes, pigments and enzymes under study, the fertilization effect had even disappeared 2 months after planting. Our results point towards a key role for the AMF symbiosis and consequent increase in P uptake in explaining the vanishing P stress.

Mesocosm

10.5194/bg-19-2353-2022

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Citations (10)

Planting pattern and nitrogen management strategies: positive effect on yield and quality attributes of Triticum aestivum L. crop

BMC Plant Biology (2024)

Muhammad Azam Jalal Bayar Babar Iqbal Uzair Ahmad Mohammad K. Okla

Crop Management

10.1186/s12870-024-05537-z

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Late autumn warming can both delay and advance spring budburst through contrasting effects on bud dormancy depth in Fagus sylvatica L.

Tree Physiology (2023)

Romain Garrigues Inge Dox Omar Flores Lorène Julia Marchand Andrey V. Malyshev

The current state of knowledge on bud dormancy is limited. However, expanding such knowledge is crucial in order to properly model forest responses and feedback to future climate. Recent studies have shown that warming can decrease chilling accumulation and increase dormancy depth, thereby inducing delayed budburst in European beech (Fagus sylvatica L). Whether fall warming can advance spring phenology is unclear. To investigate the effect of warming on endodormancy of deciduous trees, we tested the impact of mild elevated temperature (+2.5-3.5 °C; temperature, on average, kept at 10 °C) in mid and late autumn on the bud dormancy depth and spring phenology of beech. We studied saplings by inducing periods of warming in greenhouses over a 2-year period. Even though warming reduced chilling accumulation in both years, we observed that the response of dormancy depth and spring budburst were year-specific. We found that warming during endodormancy peak could decrease the bud dormancy depth and therefore advance spring budburst. This effect appears to be modulated by factors such as the date of senescence onset and forcing intensity during endodormancy. Results from this study suggest that not only chilling but also forcing controls bud development during endodormancy and that extra forcing in autumn can offset reduced chilling.

Growing season

Chilling Requirement

Forcing (mathematics)

10.1093/treephys/tpad080

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Evaluation of some triticale genotypes under different salt concentrations at germination and early seedling stage

Research Square (Research Square) (2023)

E. A. Ramadan Haytham A. Freeg Nagwa Shalaby M. Rizk Jun Ma

Abstract The aim of the current investigation is to study the effect of salinity on triticale genotypes at germination and early seedling stage. Nine triticale genotypes were used. Six salt concentrations i.e. control, 40, 80, 120, 160 and 200 mM NaCl were applied. Results indicated that increasing salinity concentrations negatively affected the studied traits. The genotypes Zhongsi 10841048, C6, C23 and C25 had better performance for germination rate, germination vigor index, germination percentage, mean daily germination and relative salt injury. Highly significant positive correlations were revealed among the traits including germination rate, germination vigor index, germination percentage, mean daily germination, seedling vigor index and root length indicating the importance of these traits for selection of salt tolerance genotypes at germination stage. PCA was able to group the most desirable genotypes into two clusters.

Triticale

10.21203/rs.3.rs-2433922/v1

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Ecometabolomic analysis of the effect of more persistent precipitation regimes reveals common and tolerance related metabolic adjustments in four grassland species

Environmental and Experimental Botany (2023)

Lin Zi Albert Gargallo‐Garriga Michal Oravec Hamada AbdElgawad Ivan Nijs

Holcus lanatus

Metabolome

Plantago

Phleum

10.1016/j.envexpbot.2023.105489

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Citations (5)

B₂O₃ nanoparticles alleviate salt stress in maize leaf growth zones by enhancing photosynthesis and maintaining mineral and redox status

Physiologia Plantarum (2023)

Nadia Mohamed El‐Shafey Viktoriya Avramova Gerrit T.S. Beemster Shereen Magdy Korany Hamada AbdElgawad

Salt stress induces significant loss in crop yield worldwide. Although the growth-stimulating effects of micronutrient nanoparticles (NPs) application under salinity have been studied, the molecular and biochemical mechanisms underlying these effects are poorly understood. The large size of maize leaf growth zones provides an ideal model system to sample and investigate the molecular and physiological bases of growth at subzonal resolution. Using kinematic analysis, our study indicated that salinity at 150 mM inhibited maize leaf growth by decreasing cell division and expansion in the meristem and elongation zones. Consistently, salinity downregulated cell cycle gene expression (wee1, mcm4, and cyclin-B2-4). B2 O3 NP (BNP) mitigated the stress-induced growth inhibition by reducing the decrease in cell division and expansion. BNP also enhanced the photosynthesis-related parameters. Simultaneously, chlorophyll, phosphoenolpyruvate carboxylase and ribulose-1,5-bisphosphate carboxylase/oxygenase were stimulated in the mature zone. Concomitant with growth stimulation by BNP, mineral homeostasis, particularly for B and Ca, was monitored. BNP reduced oxidative stress (e.g., lessened H2 O2 generation along the leaf zones and reduced lipid peroxidation in the mature zone) induced by salinity. This resulted from better maintenance of the redox status, that is, increased the glutathione-ascorbate cycle in the meristem and elongation zones, and flavonoids and tocopherol levels in the mature zone. Our study has important implications for assessing the salinity stress impact mitigated by BNP on maize growth, providing a basis to improve the resilience of crop species under salinity stress conditions.

10.1111/ppl.14033

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