Hameed Alsamadany

Scopus Publications

Taxonomic characterizations of the genus Commicarpus Standl. (Nyctaginaceae) in Saudi Arabia
Maad S. Ytemi, Hameed Alsamadany, Faraj Abdullah Al-Ghamdi, Abadi M. Mashlawi, A. El-Shabasy
Plos One, 2026
The genus Commicarpus Standl. is a member of the family Nyctaginaceae. The genus includes about 30–35 species distributed across tropical and subtropical regions worldwide, including Saudi Arabia. Five species of Commicarpus are found through, the field survey, which are primarily concentrated in the western and southwestern regions of Saudi Arabia. The collected species are C. grandiflorus , C. helenae , C. mistus , C. plumbagineus , and C. sinuatus . The aim of this study is to do morphological, anatomical, and palynological analyses of these species. Morphologically, growth habit, stem texture, leaf characteristics, floral structure, and fruit morphology were evaluated, these characters are significant to distinguish Commicarpus species. Anatomical studies of the stems, leaves, and petioles show some important characteristics that can help to separate Commicarpus species, including variations in collenchyma and chlorenchyma layers, vascular bundle arrangement, and mesophyll structure. Petiole anatomy, particularly the shape and arrangement of ground tissue and vascular bundles, provides additional taxonomic markers. Also, the study of pollen grains of the species using light microscopes (LM) and scanning electron microscopes (SEM) provides significant character that can be used for species differentiation, including differences in pollen size, shape, polar and equatorial axis dimensions, tubuliferous density, pore diameter, and spinule length. Pollen grains are very large in C. grandiflorus , C. plumbagineus , and C. sinuatus and large in C. helenae and C. mistus ; their shapes range from oblate-spheroidal in C. grandiflorus to prolate-spheroidal in the other species. Two keys are constructed, one utilizing morphological characteristics and the other employing anatomical features of the petioles to aid in species identification. These results contribute valuable taxonomic information for the genus Commicarpus in Saudi Arabia.
Exogenous biostimulant bee-honey solution improves Triticum aestivum L. tolerance to salt stress by modulating physio-biochemical responses and upregulation of salinity-related genes
Asma Algasem, Sameera Alghamdi, Hameed Alsamadany
Frontiers in Plant Science, 2026
Introduction Salinity is a major global constraint to wheat productivity, primarily due to oxidative damage, osmotic imbalance, and ionic toxicity. This study evaluated the potential of bee-honey solution (BHS) as a natural biostimulant to mitigate salinity stress effects in wheat (cv. Yecora Rojo). Methods Plants were treated with 0, 100, 150, and 200 mM NaCl, with foliar application of BHS (0, 1.0, and 1.5%). BHS potential influences on plant growth, physio-biochemical indices, antioxidant defense system, and gene expression under four salinity levels were evaluated. Results Salt stress at 200 mM, decreased plant height by 25%, leaf area by 14%, and biomass by 28% compared to control, while chlorophyll content reduced by 63%, and the Na + /K + ratio rose by 206%. Besides, ROS levels inclined markedly, with H 2 O 2 (+ 125%), O 2 • − (+ 100%), and MDA (+ 129%) accumulation relative to non-stressed plants. Foliar application of BHS, particularly at 1.5%, significantly mitigated these effects: plant height increased by 37%, leaf area by 43%, and biomass by 52% compared to stressed-control plants. Chlorophyll content increased by 73%, RWC rose by 25%, and the Na + /K + ratio decreased by 23%. Besides, BHS significantly reduced H 2 O 2 (- 17%), O 2 • − (- 18%), and MDA (- 31%) levels while increasing antioxidant enzyme activities: SOD (+ 33%), POD (+ 86%), and CAT (+ 38%). Proline content increased by 25% through TaP5CS upregulation, while GB decreased by 29%, indicating regulated osmolytic balance. Gene expression analysis showed strong upregulation of TaPOD-D1 (+ 4.1-fold), TaSOD2 (+ 3.8-fold), TaCAT1 (+ 3.6-fold), TaNHX2 (+ 2.9-fold), and TaHKT1;4 (+ 3.2-fold) in BHS-treated plants under salt stress. Multivariate analyses; PCA and heatmap confirmed close association of BHS treatments with increased physiological, biochemical, and molecular responses, particularly under high salinity level. Discussion &amp; conclusion The present findings prove that BHS is an effective, eco-friendly biostimulant that imparts salt resilience to wheat by integrating morphological, physiological, biochemical, and molecular mechanisms.
Foliar thiourea and potassium nitrate enhance physiological performance, antioxidant defense, and yield of heat-stressed wheat under field conditions
Yahya Alzahrani, Hameed Alsamadany, Zahid H. Shah
Frontiers in Plant Science, 2026
Terminal heat stress negatively affects wheat by disrupting physiological, biochemical, and agronomic traits. This study examined the effects of thiourea (50 µM) and KNO 3 (0.5%), applied individually or together, on a heat-sensitive wheat genotype (HS-240) grown under field conditions. Treatments were: T 0 (control), T 1 (thiourea), T 2 (KNO 3 ), and T 3 (thiourea + KNO 3 ). The combined treatment (T 3 ) improved key physiological traits, including photosynthesis rate (14.2 vs. 8.8 µmol CO 2 m - ² s - ¹), relative water content (83% vs. 65%), and chlorophyll stability (SPAD 42 vs. 28) compared to control. Biochemical defenses were also enhanced, with higher levels of proline, soluble sugars, total phenolics, and stronger antioxidant enzyme activities (SOD, CAT, POD, APX). Oxidative damage decreased, as indicated by lower electrolyte leakage and MDA, and canopy temperature depression increased (2.5 °C → 9.0 °C). These physiological and biochemical improvements translated into better crop performance, with higher grain yield (16 g vs. 12 g per plant), thousand-grain weight (42 g vs. 34 g), and harvest index (49%). Molecular analysis showed that T 3 strongly upregulated genes involved in stress tolerance, antioxidants, and yield regulation ( TaHSP17, TaHSP90, TaSOD, TaCAT, TaAPX, TaP5CS, TaDREB2, TaSUS, TaGW2, TaCKX2 ). Multivariate analyses (correlation, PCA, heatmap) confirmed positive associations between photosynthesis, antioxidant activity, and yield traits. Overall, the combined application of thiourea and KNO 3 enhances wheat heat tolerance through integrated physiological, biochemical, and molecular mechanisms, offering a practical and cost-effective strategy to sustain wheat productivity under high-temperature stress.
The foliar potassium silicate enhances wheat terminal-drought tolerance and yield via physiological, biochemical and genetic regulation
Yahya Alzahrani, Hameed Alsamadany, Zahid H. Shah
Frontiers in Plant Science, 2026
Drought stress limits wheat productivity at terminal stage by disrupting physiological activities, impairing cellular homeostasis, and decreasing grain yield. Present study elucidated the role of potassium silicate (K 2 SiO 3 ) in mitigating drought-induced damage in wheat through integrated physiological, biochemical, agronomic, and molecular approaches. Wheat plants were subjected to terminal drought-stress under four different levels (0, 2, 4, and 6 mM) of K 2 SiO 3 . Application of K 2 SiO 3 , particularly at 6 mM, significantly improved relative water content, photosynthetic rate, and PSII efficiency. Antioxidant defense system was reinforced through higher SOD, CAT, and POD activities, accompanied by lower MDA and electrolyte leakage. Yield components were markedly increased, with grain yield increasing by 72% relative to control, alongside significant gains in thousand grain weight, grains per spike, and biomass. Gene expression analysis revealed significant upregulation of TaDREB2 and TaNCED1 , supporting improved water relations, while TaSOD, TaCAT, and TaAPX1 regulation corresponded with increased antioxidant enzymes activities. Reduced expression of TaP5CS aligned with lower proline accumulation, whereas TaBADH upregulation was consistent with increased GB content. Moreover, TaLEA upregulation supported membrane stability, and yield-related genes TaCKX2 and TaGW2 expression improved spike fertility and grain weight. These results demonstrated that K 2 SiO 3 treatment activates multiple drought tolerance mechanisms that integrate gene regulation, osmotic adjustment, antioxidant defense, and yield stabilization. Overall, the findings establish application of K 2 SiO 3 especially at 6 mM, as an effective strategy for enhancing drought tolerance and sustaining the productivity of drought susceptible wheat cultivar (Galaxy-2013) at terminal stage of drought stress.
Integral Crop for Intensifying Cropping Systems
Ammar Ali, Ammara Siddique, Raheela Rehman, Rana Arif Manzoor Khan, Azeem Iqbal Khan, et al.
Soybeans Volume 1 History Breeding and Product Profile, 2026
Comprehensive root transcriptome study of Lantana camara L.: uncovering key genes in flavonoid biosynthesis
Muzammil Shah, Mursaleen, Eman Abdullah Almuqri, Shah Saud, Shah Hassan, et al.
Genetic Resources and Crop Evolution, 2026
Biochar mitigates human health risks and phytotoxicity of arsenic and heat stress in quinoa by decreasing bioaccumulation of arsenic and oxidative stress attributes
Yahya M. Alzahrani, Hesham F. Alharby, Arslan Shabbir, Ghulam Abbas, Munawar Hussain, et al.
Environmental Geochemistry and Health, 2025
Effect of Ocimum tenuiflorum L. compounds on Oreochromis mossambicus: a combination of molecular docking, biochemical dynamics, and antifertility assessment
Sajida Afzal, Siraj Khan, Muhammad Nauman Khan, Zahida Nasreen, Hansa Gul, et al.
Aquaculture International, 2025
Mitigating Terminal Drought in Chickpea (Cicer arietinum L.) Using Organic Manures; Effects on Yield, Potassium Uptake and Antioxidants Activity
Malik Muhammad Yousaf, Azra Yasmeen, Shadia Hama Salih Kareem, Muhammad Arif, Hesham F. Alharby, et al.
International Journal of Plant Production, 2025
Seed Pre-treatment with Thiourea Improves Physiological and Metabolic Adaptation to Booting Stage Salinity in Wheat
Azka Saleem, Mehwish Rubab, Maria Abubakar, Ali Raza, Amnah M. Alamri, et al.
Journal of Crop Health, 2025
Transcriptome analysis of genes associated with some phytohormones and phytohormone-like activities in drought-stressed tomato cultivar super strain B
Tarek A.A. Moussa, Hassan Al-Zahrani, Hameed Alsamadany, Rehab Mahmoud Hafez, Michael P. Fuller
Egyptian Journal of Botany, 2025
EVALUATION OF DIFFERENT CONCENTRATIONS OF TARZEC AND AXIAL HERBICIDES AND SEEDING RATES ON WHEAT (TRITICUM AESTIVUM L.) GROWTH, YIELD, AND WEED CONTROL
Dheyaa Aljuburi, Moyassar Aziz, Ammar Sami, Hameed Alsamadany, Abeer Kutby
Mesopotamia Journal of Agriculture, 2025
Synergistic Effects of Zinc Oxide Nanoparticles and Moringa Leaf Extracts on Drought Tolerance and Productivity of Cucurbita pepo L. Under Saline Conditions
Abdelsattar Abdelkhalik, Mohammed A. H. Gyushi, Saad M. Howladar, Abeer M. Kutby, Nouf A. Asiri, et al.
Plants, 2025
Biofertilizers mitigate salinity stress: insights from spring wheat physiology and gene expression
Halimah Al Khallaf, Hassan M. Rashad, Hameed Alsamadany
Frontiers in Plant Science, 2025
Green biogenic sulfur nanoparticles enhance Capsicum annuum (L.) resilience to salt stress by triggering physio-biochemical and genetic repair mechanisms
Hissah Alrabie, Hameed Alsamadany, Ameina S. Almoshadak, Rahma Alshamrani, Manal El-Zohri
Frontiers in Plant Science, 2025
Combining Ability and Heterotic Effects in Newly Developed Early Maturing and High-Yielding Maize Hybrids under Low and Recommended Nitrogen Conditions
Mohamed M. Kamara, Nora M. Al Aboud, Hameed Alsamadany, Abeer M. Kutby, Imen Ben Abdelmalek, et al.
Phyton International Journal of Experimental Botany, 2025
Host-parasitoid dynamics of Pieris brassicae and Cotesia vestalis: Sustainable pest control in cruciferous crops
Sadia Maalik, Sajida Mushtaq, Naheed Bano, Moazama Batool, Nazia Ehsan, et al.
Bulletin of Entomological Research, 2025
Enhancing Germination and Seedling Growth in Salt Stressed Maize Lines through Chemical Priming
Basrah Journal of Agricultural Sciences, 2024
Exogenous supply of potassium decreases the phytotoxicity of heat and salt stress in quinoa by ameliorating physiological and oxidative stress responses
Yahya M. Alzahrani, Ghulam Abbas, Usama Samee Ullah, Saira Afzal, Hesham F. Alharby, et al.
Journal of Plant Nutrition and Soil Science, 2024
Comparative effects of micron-sized silicon sources and Si nanoparticles on growth, defense system and cadmium accumulation in wheat (Triticum aestivum L.) cultivated in Cd contaminated soil
Yousef Alhaj Hamoud, Muhammad Zia-ur-Rehman, Ishaq A. Mian Kakakhel, Muhammad Usman, Muhammad Rizwan, et al.
Environmental Technology and Innovation, 2024
COMPARATIVE PHYTOCHEMICAL STUDY ON THREE TETRAENA SPECIES (ZYGOPHYLLACEAE) GROWING AT DIFFERENT SALINITY LEVELS
Manal El-Zohri, Amina Al-Moshaddak, Hameed Alsamadany, Hassan S. Alzahrani
Pakistan Journal of Botany, 2024
Modulating Physiological and Antioxidant Responses in Wheat Cultivars via Foliar Application of Silicon Nanoparticles (SiNPs) Under Arsenic Stress Conditions
Zahoor Ahmad, Rooma Younis, Tanveer Ahmad, Muhammad Aamir Iqbal, Arkadiusz Artyszak, et al.
Silicon, 2024
Residual efficiency of iron-nanoparticles and different iron sources on growth, and antioxidants in maize plants under salts stress: life cycle study
Hameed Alsamadany, Sidra Anayatullah, Muhammad Zia-ur-Rehman, Muhammad Usman, Talha Ameen, et al.
Heliyon, 2024
Improving Alkaline Stress Tolerance in Maize through Seed Priming with Silicon Nanoparticles: A Comprehensive Investigation of Growth, Photosynthetic Pigments, Antioxidants, and Ion Balance
Hameed Alsamadany, Hesham F. Alharby, Zahoor Ahmad, Hassan S. Al-Zahrani, Yahya M. Alzahrani, et al.
Silicon, 2024
Exogenous silicon alleviates aluminum phytotoxicity in Fagopyrum esculentum Moench by modulating physiological and antioxidant responses
Fayaz Ahmad Dar, Inayatullah Tahir, Reiaz Ul Rehman, Hesham F. Alharby, Yahya Alzahrani, et al.
South African Journal of Botany, 2024

Hameed Alsamadany

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Scopus Publications