Publications by authors named "Yaser H Dewir"

Soybean's lengthy protocols for transgenic plant production are a bottleneck in the transgenic breeding of this crop. Explants cultured on a medium for an extended duration exhibit unanticipated modifications. Stress-induced somaclonal variations and in vitro contaminations also cause substantial losses of transgenic plants.

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is a fruit-bearing tree that is distributed in Southeast Asia and Australia. The objective of this research was to ascertain the following with regard to ripened fruits: (i) their nutritional value, (ii) their mineral status, (iii) the fatty acid composition of fruit and seed oil, (iv) their phytochemical makeup, and (v) their antioxidant properties. The ripened fruits contained 3.

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L. is one of the important plant species of Nilgiris, Kashmir and Darjeeling regions of India, belonging to the family Plantaginaceae, with well-known pharmacological applications. In the present investigation, an culture technique of indirect shoot organogenesis of is being explored; the biochemical attributes, the antioxidant activities and the metabolomic analyses were made by utilizing untargeted Gas Chromatography-Mass Spectrometry (GC-MS) and Ultra Performance Liquid Chromatography coupled with electronspray ionization/quadrupole-time-of-flight-mass spectrometry (UPLC-ESI-QTOF-MS) approaches.

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Galanthamine is an immensely valuable alkaloid exhibiting anti-cancer and antiviral activity. The cultivation of plant tissues in in vitro conditions is a good source for the synthesis and enrichment of secondary metabolites of commercial interest. In this study, the Amaryllidaceae alkaloid galanthamine was quantified in three species, such as , , and , and the impact of the methyl jasmonate (MJ) signaling molecule on galanthamine accumulation was monitored in in vitro-derived plant tissues.

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Article Synopsis
  • The study focuses on the micropropagation of a fig species known for its nutritious fruit and therapeutic uses, utilizing nodal explants in a lab setting.
  • Researchers identified optimal conditions for shoot proliferation, achieving 10.9 shoots per explant using specific concentrations of sucrose and cytokinins, while dark incubation encouraged root and shoot growth.
  • Genetic testing confirmed a 95.9% similarity between the micropropagated plantlets and the original mother plant, ensuring true-to-type growth, which supports commercial fig propagation efforts.
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Plant growth indicators (GIs) are important for evaluating how different genotypes respond to normal and stress conditions separately. They consider both the morphological and physiological components of plants between two successive growth stages. Despite their significance, GIs are not commonly used as screening criteria for detecting salt tolerance of genotypes.

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In this study, a Gas chromatography-mass spectrometry (GC-MS) investigation of embryogenic callus and somatic embryo regenerated shoots of revealed the presence of a variety of sugars, sugar acids, sugar alcohols, fatty acids, organic acids, and amino acids of broad therapeutic value. The in vitro developed inflorescence contained a wide range of active compounds. In embryogenic calluses, important flavonoids like naringenin, myricetin, kaempferol, epicatechin gallate, rutin, pelargonidin, peonidin, and delphinidin were identified.

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(Burm. f.) Merrill is an endangered medicinal plant that possesses various active agents, such as tylophorinine, kaempferol, quercetin, α-amyrin and beta-sitosterol, with multiple medicinal benefits.

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Fungal elicitation could improve the secondary metabolite contents of in vitro cultures. Herein, we report the effect of on vinblastine and vincristine alkaloid yields in embryos. The study revealed increased yields of vinblastine and vincristine in tissues.

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(Acanthaceae) is a shrub located in South Africa and is relatively understudied. However, plants within this genus are well known for their medicinal and ethnopharmacological properties. This study aimed to characterise the phytochemical compounds and antibacterial efficacies of .

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  • Nees is a plant from the Acanthaceae family found in the Western Ghats of India, and this research aimed to analyze its phytochemical composition and antioxidant properties using gas chromatography and mass spectrometry (GC-MS).
  • Extracts from its roots, stems, and leaves were processed with methanol, revealing the stem has the highest concentration of phenolics.
  • The study identified various bioactive compounds and confirmed that the stem extract showed strong antioxidant activity, indicating Nees' potential health benefits.
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Medicinal plants offer reasonable and accessible alternatives to synthetic drugs and are often devoid of the adverse side effects, toxicity, and pathogenic resistance associated with synthetic medicine. has been utilized in African traditional medicinal practices and purportedly contains bioactive compounds with medicinally beneficial effects. This study investigated the hexane, chloroform, and methanol leaf and stem extracts for their antioxidant properties using the 2,2'-diphenyl-1-picrylhydrazyl radical scavenging and ferric-reducing antioxidant power assays.

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Article Synopsis
  • * Various extraction methods (hexane, chloroform, methanol) revealed the presence of several beneficial compounds, including alkaloids, flavonoids, and tannins, across all extracts.
  • * Analytical techniques like FTIR and EDX identified specific functional groups and elemental compositions, while fluorescence microscopy showed distinct color changes under UV light, highlighting the plant's characteristics.
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Background: Medicinal plants are known to contain numerous phytometabolites with suggested pharmacological value. Literature suggests that the medicinal use of phytometabolites in its natural state has limited success due to poor absorption rates. Currently, the focus lies on synthesizing phytometabolites extracted from medicinal plants and silver ions to generate nano-scale carriers with specialized properties.

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Red dragon fruit () is an economic and promising fruit crop in arid and semi-arid regions with water shortage. An automated liquid culture system using bioreactors is a potential tool for micropropagation and large-scale production. In this study, axillary cladode multiplication of was assessed using cladode tips and cladode segments in gelled culture versus continuous immersion air-lift bioreactors (with or without a net).

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  • *A two-year field study tested twelve different application methods and concentrations of SA on wheat growth, yield, and irrigation water use efficiency (IWUE) under both full and limited irrigation conditions.
  • *Results revealed that applying SA through seed soaking and foliar methods improved vegetative and yield parameters, with the best outcomes from foliar applications of 1-3 mM SA alone or in combination with seed soaking.
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  • - Lavender croton has three unique secretory structures: lepidote trichomes, glandular trichomes, and non-articulated laticifers, which play various roles in the plant.
  • - Lepidote trichomes create a protective layer on the underside of leaves and, despite being thought non-glandular, show significant metabolic activity through advanced imaging techniques.
  • - Both trichome types and laticifers contain compounds like alkaloids and phenolics, suggesting they contribute to the plant's defense mechanisms and may have potential applications in traditional medicine.
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is traditionally used for an anti-bacterial property. Its cytotoxic effects have not been studied before. Therefore, this study aimed to examine the nutritional properties as well the cytotoxic effects of .

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  • The study explores how silver nanoparticles (AgNPs) are produced from plant extracts, specifically leaves and stem bark, focusing on their antioxidant and antibacterial properties.
  • AgNPs synthesized from stem bark at 80 °C showed significant scavenging activity, outperforming ascorbic acid, while also exhibiting varying degrees of bacterial growth and violacein inhibition against specific bacterial strains.
  • The findings suggest that these AgNPs could serve dual purposes as antioxidants and as potential treatments for Gram-negative bacterial infections by inhibiting quorum sensing.
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is a perennial species prominently acknowledged for its local medicinal applications. The native utilisation of this species in traditional medicine may be ascribed to the presence of secretory structures and their exudate (comprised of phytochemicals). However, the morphological nature and optical features of the secretory structures in remain largely unclear.

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Although plant chlorophyll (Chl) is one of the important elements in monitoring plant stress and reflects the photosynthetic capacity of plants, their measurement in the lab is generally time- and cost-inefficient and based on a small part of the leaf. This study examines the ability of canopy spectral reflectance data for the accurate estimation of the Chl content of two wheat genotypes grown under three salinity levels. The Chl content was quantified as content per area (Chl , μg cm), concentration per plant (Chl , mg plant), and SPAD value (Chl ).

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