Dr. Osama H. Sayed
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Dr. Osama H. Sayed

Department of Biology, Jazan University, Saudi Arabia

Highest Degree
Ph.D. in Plant Physiology from Manchester University, United Kingdom

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Area of Interest:

Plant and Soil Sciences
Plant Physiology
Crop Production

Research Publications in Numbers


Selected Publications

  1. Sayed, O.H., Y.S. Masrahi and M. Remesh, 2020. Environmental impact of desert dam reservoir in arid habitat. Asian J. Plant Sci., 19: 191-199.
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  2. Sayed, O.H., Y.S. Masrahi, M. Remesh and B.S. Al-Ammari, 2019. Coffee production in southern Saudi Arabian highlands: Current status and water conservation. Saudi J. Biol. Sci., 10.1016/j.sjbs.2019.03.002.
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  3. Sayed, O.H., 2019. Critical treatise on university ranking systems. Open J. Social Sci., 7: 39-51.
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  4. Remesh, M., Y.S. Masrahi and O.H. Sayed, 2019. First report of Phragmites australis (Poaceae) in the Southwest of Saudi Arabia. Saudi J. Biol. Sco. (In Press). .
  5. Sayed, O.H. and Y.S. Masrahi, 2018. Chlorophyll fluorescence: Theory and applications. A review. J. Jazan Univ., Vol. 5. .
  6. Remash, M., Y.S. Masrahi and O.H. Sayed, 2018. Phragmites australis (Poaceae): New addition to flora of Southwestern Saudi Arabia. Saudi J. Biol. Sci., 10.1016/j.sjbs.2018.11.001.
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  7. Masrahi, Y.S., M. Remesh and O.H. Sayed, 2017. Enumeration of the Flora of Wadi Lajab Saudi Arabia. Ecol. Environ. Conserv., 23: 99-106.
  8. Masrahi, Y.S. and O.H. Sayed, 2017. Invasive Opuntia stricta: Case study in Southwestern Saudi Arabia. Ecol. Environ. Conserv., 23: 195-201.
  9. Thomas, J., M.A. El-Sheikh, A.H. Alfarhan, A.A. Alatar and M. Sivadasan et al., 2016. Impact of alien invasive species on habitats and species richness in Saudi Arabia. J. Arid Environ., 127: 53-65.
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  10. Sayed, O.H. and Y.S. Masrahi, 2016. Dictionary of Plant Names. Okaz Press, Jeddah.
  11. Masrahi, Y.S., T.A. Al-Turki and O.H. Sayed, 2016. Comparative ecophysiology and photoprotection in two stem succulent Euphorbia species in arid habitat. Ecol. Balkanica, 8: 77-84.
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  12. Masrahi, Y.S., T.A. Al-Turki and O.H. Sayed, 2015. Photosynthetic adaptation and survival strategy of Duvalia velutina in an extremely arid environment. Photosynthetica, 53: 555-561.
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  13. Elhaes, H., A. Al-Hossain, O. Sayed and M. Ibrahim, 2015. Modeling the effect of salinity on soil organic matter. Quant. Matter, 4: 94-97.
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  14. Al-Robaie, A.A., Z.I. Al-Fifi, O.H. Sayed and F.S. Abo-Zina, 2015. Cell Biology. Okaz Press, Riyadh.
  15. Al-Turki, T.A., Y.S. Masrahi and O.H. Sayed, 2014. Photosynthetic adaptation of Euphorbia fractiflexa (Euphorbiaceae) and survival in arid regions of the Arabian Peninsula. J. Plant Interact., 9: 107-111.
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  16. Al-Turki, T.A., O.H. Sayed and Y.S. Masrahi, 2014. Physiotypic plasticity and survival of arido-active Euphorbia triaculeata (Euphorbiaceae) in its natural habitat. Ecol. Balkanica, 6: 35-41.
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  17. Masrahi, Y.S., T.A. Al-Turki and O.H. Sayed, 2012. Geographical distribution and chorology of grasses in the Arabian Peninsula. Flora-Morphol. Distrib. Funct. Ecol. Plants, 207: 250-256.
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  18. Masrahi, Y.S., T.A. Al-Turki and O.H. Sayed, 2012. Crassulacean acid metabolism permutation and survival of Caralluma species (Apocynaceae) in arid habitats. Ecol. Balkanica, 4: 63-71.
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  19. Masrahi, Y.S., M.N. Al-Yemeni, T.A. Al-Turki and O.H. Sayed, 2012. Structural and functional adaptations of the stem succulent Cralluma acutangula to its natural habitat. Kuwait J. Sci. Eng., 39: 155-169.
  20. Masrahi, Y.S., M.N. Al-Yemeni and O.H. Sayed, 2012. Nurse association of the stem succulent Caralluma acutangula in its natural habitat. Ekologia, 31: 46-53.
  21. Masrahi, Y.S., T.A. Al-Turki and O.H. Sayed, 2011. Wolffiella hyalina (Delile) Monod (Lemnaceae)-a new record for the flora of Saudi Arabia. Feddes Repertorium, 121: 189-193.
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  22. Masrahi, Y.S., M.N. Al-Yemeni, T.A. Al-Turki and O.H. Sayed, 2011. Ecophysiological mechanisms of succulent survival in natural conditions: Photosynthetic carbon fixation in Caralluma acutangula (Decne. Ne.Br.) (Asclepiadaceae). Polish J. Ecol., 59: 381-389.
  23. Masrahi, Y.S., A.A. Al-Huqail, T.A. Al-Turki and O.H. Sayed, 2011. Differential altitudinal distribution and diversity of plants with different photosynthetic pathways in arid Southern Saudi Arabia. Aust. J. Basic Applied Sci., 5: 36-43.
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  24. Sayed, O.H., 2003. Chlorophyll fluorescence as a tool in cereal crop research. Photosynthetica, 41: 321-330.
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  25. Sayed, O.H., 2001. Crassulacean acid metabolism 1975-2000, a check list. Photosynthetica, 39: 339-352.
  26. Sayed, O.H., 2001. Aridity and Plant Survival in Desert Environments. In: Ecology of Desert Environments, Prakash, I. (Ed.)., Scientific Publishers, Judhpur, India, pp: 78-103.
  27. Sayed, O.H., 2000. Introductory Botany. Engineering Bureau Pubs., Cairo, Page: 125.
  28. Sayed, O.H. and M.K. Mohamed, 2000. Altitudinal changes in photosynthetic pathways of floristic elements in Southern Sinai, Egypt. Photosynthetica, 38: 367-372.
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  29. Sayed, O.H. and A.M. El-Shahed, 2000. Growth, photosynthesis and circadian patterns in Chlorella vulgaris (Chlorococcales, Chlorophyta) in response to growth temperature. Cryptogamie Algol., 21: 283-290.
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  30. Al-Bayoumi, A., Y. Saleh and O.H. Sayed, 2000. Fundamentals of Botany. El-Dar El-Arabia, Cairo, Page: 541.
  31. Sayed, O.H., 1998. Phenomorphology and ecophysiology of desert succulents in eastern Arabia. J. Arid Environ., 40: 177-189.
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  32. Sayed, O.H., 1998. Analysis of photosynthetic responses and adaptation to nitrogen starvation in Chlorella using in vivo chlorophyll fluorescence. Photosynthetica, 35: 611-619.
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  33. Sayed, O.H., 1997. Appraisal into phytochemistry and taxonomy of an old plant collection from the Middle East. Qatar Univ. Sci. J., 17: 121-126.
  34. Sayed, O.H., 1996. Adaptational responses of Zygophyllum qatarense Hadidi to stress conditions in a desert environment. J. Arid Environ., 32: 445-452.
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  35. Sayed, O.H. and M.J. Emes, 1996. Control of photosynthetic electron transport in isolated wheat thylakoids. Photosynthetica, 32: 513-520.
  36. Al-Bayoumi, A., Y. Saleh, O.H. Sayed and A. Turki, 1996. Plant Biology. University Press, Doha, Qatar Page: 522.
  37. Sayed, O.H., 1995. Effects of temperature on growth, morphology and photosynthesis in wheat. Biol. Plantarum, Vol. 37. 10.1007/BF02912997.
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  38. Sayed, O.H., 1995. Effect of the expected sea level rise on Avicennia marina L. A case study in Qatar. Qatar Univ. Sci. J., 15: 91-94.
  39. Sayed, O.H., M.J. Earnshaw and M.J. Emes, 1994. Characterization of the heat‐induced stimulation of Photosystem‐I‐mediated electron transport. Acta Bot. Neerlandica, 43: 137-143.
  40. Sayed, O.H., M.J. Earnshaw and M. Cooper, 1994. Growth, water relations and CAM induction in Sedum album in response to water stress. Biol. Plantarum, Vol. 36. 10.1007/BF02920936.
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  41. Sayed, O.H., 1994. Edaphic gradients and species attributes influencing the distribution of flora in littoral salt marshes of Qatar. Qatar Univ. Sci. J., 14: 257-262.
  42. Sayed, O.H., 1994. Condition and trend of a depression-type habitat in rainfed desert rangelands of Qatar in response to fertilizer application. Qatar Univ. Sci. J., 14: 289-292.
  43. Sayed, O.H. and S. Wilson, 1994. Nature of the Aflatoxin B1-induced inhibition of photosynthesis in Chlorella fusca (Chlorococcales, Chlorophyta). Qatar Univ. Sci. J., 14: 66-70.
  44. Sayed, O.H. and A.K. Hegazy, 1994. Growth-specific phytomass allocation in Mesembryanthemum nodiflorum as influenced by CAM induction in the field. J. Arid Environ., 27: 325-329.
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  45. Sayed, O.H., 1993. Ecophysiological characteristics, distribution and nutritional value of desert range plants in Qatar. Qatar Univ. Sci. J., 13: 243-246.
  46. Sayed, O.H., 1992. Photosynthetic acclimation to high temperatures in wheat. Acta Bot. Neerlandica, 41: 299-304.
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  47. Sayed, O.H. and E.M. Fadl-Allah, 1992. Influence of aflatoxin B1 on growth, photosynthetic oxygen evolution and regreening of Chlorella fusca (Chorococcales, Chlorophyta). Cryptogamie Algol., 13: 45-48.
  48. Sayed, O.H. and A.K. Hegazy, 1992. Inhibition of secondary carotenoid biosynthesis during degreening of Chlorella fusca (Chlorococcales, Chlorophyta) and implications for growth and survival. Cryptogamie Algol., 13: 181-186.
  49. Sayed, O.H., 1991. Phenylpyridazinone herbicides as inhibitor of photosynthetic electron transport in isolated wheat chloroplasts. Bull. Sci., Assiut Univ., 20: 1-8.
  50. Sayed, O.H., 1991. Conformational changes in isolated wheat thylakoids aging in vitro as reflected by changes in photosynthetic electron transport. Bull. Sci., Assiut Univ., 20: 105-112.
  51. Sayed, O.H. and A.K. Hegazy, 1991. Life table analysis and ecophysiology of Mesembryanthemum nodiflorum in its natural environment. Acta Oecol., 12: 753-760.
  52. Fadl-Allah, E.M. and O.H. Sayed, 1991. Proline accumulation and osmoregulation in Aspergillus melleus. Bull. Facul. Sci., 20: 207-221.
  53. Sayed, O.H. and M.M. Tantawy, 1990. Action of the phenyl-pyridazinone herbicides BASF 33650 and BASF 44521 on the green and orange cells of Chlorella fusca. J. Pest Control Environ. Sci., 2: 127-137.
  54. Sayed, O.H., M.J. Emes, M.J. Earnshaw and R.D. Butler, 1989. Photosynthetic responses of different varieties of wheat to high temperature. I. Effect of growth temperature on development and photosynthetic performance. J. Exp. Bot., 40: 625-631.
  55. Sayed, O.H., M.J. Earnshaw and M.J. Emes, 1989. Photosynthetic responses of different varieties of wheat to high temperature II. Effect of heat stress on photosynthetic electron transport. J. Exp. Bot., 40: 633-638.
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  56. Sayed, O.H., M.J. Emes, R.D. Butler and M.J. Earnshaw, 1986. High temperature induced changes in chloroplast ultrastructure, leaf fluorescence,and photosynthesis photosynthesis in wheat varieties. Biochem. Soc. Trans., 14: 59-59.
  57. Ahmed, A.M., M.D. Heikal and O.S. Hindawy, 1983. Side effects of benomyl (Fungicide) treatments on sunflower, cotton and cowpea plants. Phyton, 23: 185-195.
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