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Fahmy, G. M., and A. H. Hassan, "Haustorial structure of the holoparasitic angiosperm Cynomorium coccineum L. invading host roots", Flora, vol. 274, issue 1, 2021.
Farahat, E. A., G. M. Fahmy, H. E. A. Awad, H. F. Farrag, and W. F. Mahmoud, "Potential nutritional value of the emergent macrophyte Vossia cuspidata (Roxb.) Griff. (Poaceae) in a River Nile system, Egypt. ", Egyptian Journal of Botany, vol. 61, issue 3, pp. 867-877, 2021.
Farahat, E. A., W. F. Mahmoud, H. E. A. Awad, H. F. Farrag, A. Arshad, E. M. Eid, and G. M. Fahmy, "Prediction models for evaluating the uptake of heavy metals by the invasive grass Vossia cuspidata (Roxb.) Griff. in the River Nile, Egypt: A biomonitoring approach", Sustainability, vol. 13, issue 19, 2021.
Fahmy, G. M., Reflections on the signs of God`s Power: Latent Life and Voices of Organisms. (In Arabic), , Cairo, First Book for Publishing and Distribution, 2020.
El –Assiuty, E. M., E. M. Taha, Z. M. Fahmy, and G. M. Fahmy, "Histological and molecular detections of Peronospora variabilis Gäum. oospores in seeds of Quinoa (Chenopodium quinoa L.)", Egyptian Journal of Experimental Biology (Botany) , vol. 15, issue 2, pp. 197-203, 2019.
El-Assiuty, E. M., G. M. Fahmy, E. M. Taha, Z. M. Fahmy, A. S. M. Ismael, W. R. Abd-Elghany, and D. A. Kafsheer, "Microscopic visualization of Peronospora variabilis Gäum., the cause of quinoa downy mildew in plant tissues at different stages of plant growth. ", International Journal of Scientific and Engineering Research , vol. 10, issue 8, pp. 1022-, 2019.
Fahmy, S. A. I. Moussa, H. M. Farrag, and R. A. S. Abd El-Rehem, "Seed and germination traits of the summer weed Trianthema portulacastrum L", Egyptian Journal of Experimental Biology (Botany), vol. 15, issue 2, pp. 235-242, 2019.
Fahmy, G. M., "Trees and weeds irrigating the surrounding plants: a sustainable resource for the irrigation of economic crops in desert lands (In Arabic)", Science (Issued by the Academy of Scientific Research and Technology) , vol. 502, pp. 18-19, 2018.
Fahmy, G. M., "The Biotic Interactions of Plants in Arid Lands: case studies from Egypt and other desert systems.", 7th International Conference on: Plant and Microbial Biotechnology and their Role in the Development of the Society. Egyptian Botanical Society in collaboration with Botany Department, Faculty of Science, Tanta University, 19-20 April-2019: Egyptian Botanical Society, 2017.
Moussa, S. A., and G. M. Fahmy, Impacts of the gall-forming insect Oecocecis guyonella on a halophyte, , Saarbrücken, Germany ., Noor-publishing , 2017.
Darwish, D. S., S. A. Shrief, G. M. Fahmy, M. M. Madany, A. M. Saleh, and R. M. S. Al-Juboori, "Influence of three soil moisture levels on early growth and proline content of some faba bean genotypes. ", International Journal of ChemTech Research , vol. 9, issue 9, pp. 188-197, 2016.
Gomaa, N. H., M. O. Hassan, G. M. Fahmy, L. González, O. Hammouda, and A. M. Atteya, "Flavonoid profiling and nodulation of some legumes in response to the allelopathic stress of Sonchus oleraceus L.", Acta Botanica Brasilica, vol. 29, issue 4, pp. 553-560, 2015. flavonoid_profiling_and_nodulation_of_some_legumes_in_response...manuscript.pdf
Hassan, M. O., N. H. Gomaa, G. M. Fahmy, L. González, O. Hammouda, and A. M. Atteya, " Influence of Sonchus oleraceus L. residue on soil properties and growth of some plants", Philippine Agricultural Scientist , vol. 97, issue 4, pp. 368-376, 2014. influence_of_sonchus_oleraceus_l._residue_on_soil_properties_and_growth_of_....pdf
Gomaa, N. H., M. O. Hassan, G. M. Fahmy, L. Gonzalez, O. Hammouda, and A. M. Atteya, "Allelopathic effects of Sonchus oleraceus L. on the germination and seedling growth of crop and weed species.", Acta Botanica Brasilica , vol. 28, issue 3, pp. 408-416, 2014. allelopathic_effects_of_sonchus_oleraceus_l._on_the_germination_2014.pdf
Fahmy, G. M., Does the Latent Life Indicate Resurrection? , , Cairo , Al Shorouq International Publishing Company, 2014. latent_life_book_cover_pages.pdf
Gomaa, N. H., M. O. Hassan, G. M. Fahmy, L. Gonzalez, O. Hammouda, and A. O. Atteya, "Interactions between Sonchus oleraceus L. and some weeds in agroecosystems in Egypt", Annals of Agricultural Science, Faculty of Agriculture, Ain Shams University, vol. 59, issue 2, pp. 221-228, 2014.
Fahmy, G. M., "Ecophysiology of the holoparasitic angiosperm Cistanche phelypaea (Orobanchaceae) in a coastal salt marsh", Turkish Journal of Botany, vol. 37, pp. 908-919, 2013. Abstract

Abstract: Cistanche phelypaea (L.) Cout. (Orobancaceae) was found parasitising the roots of the succulent shrublets Arthrocnemum
macrostachyum (Moric.) K.Koch (Chenopodiaceae) in a coastal salt marsh in Qatar. Measurements were conducted to identify soil
properties, host, and noninfected plants by soil excavations to expose the haustoria of the parasite attached to the host roots. The water
potential, osmotic potential, pressure potential, and chemical analyses were determined in parasite, host, and noninfected plants. Crown
diameter and dry mass of the host plants were smaller than in the noninfected plants. A gradient of water potential existed between the
host root and the underground tuberous body of the parasite. Potassium was the major cation found in the parasite, while sodium was
dominant in the host and noninfected plants. The nitrogen, soluble sugars, total amino acids, and starch contents of the parasite were
higher than those of the host and noninfected plants. The high ratio of K+ to Ca2+ in the parasite indicates that it is phloem-feeding. The
high nutrient element contents and metabolic products in the parasite are possibly related to the creation of osmotic and water potential
gradients between the host and C. phelypaea.

Fahmy, G. M., N. A. Al-Sawaf, H. Turki, and H. I. Ali, "Allelopathic Potential of Pluchea dioscoridis (L.) DC.", Journal of Applied Sciences Research, vol. 8, issue 7, pp. 3129-3142, 2012.
Fahmy, G. M., and R. F. Al-Thani, "Diversity of halophytes and soil bacteria in the coastal salt marsh of Al-Dhakhira, Qatar.", . A paper Presented before the First International Congress of "Documenting, Analysing and Managing Biodiversity in the Middle East (20-23 October 2008) in Aqaba, Jordan., 2008.
Fahmy, G. M., "Diversity of parasitic plants in Qatar",, 2008.
Fahmy, G. M., "Autecology Prosopis cineraria (L.) Druce at Al-Ghafat Area, the State of Qatar. In: E. M. M. Abdel Bari, G. M. Fahmy, N. J. Al-Thani, R. F. Al-Thani and M. S. Abdel-Dayem, The Ghaf Tree Prosopis cineraria in Qatar.", . Published by National Council for Culture, Arts and Heritage and Environmental studies Centre (ESC), Qatar University, 2007.