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Magdalena Ptaszek, Leszek B. Orlikowski, Wojciech Migdał and Urszula Gryczka

Abstract

Effectiveness of electron beam irradiation was evaluated against Phytophthora nicotianae var. nicotianae, the causal agent of stem base and root rot of tomato. In laboratory trials, irradiation of 7-day-old Phytophthora cultures growing on potato-dextrose-agar (PDA) medium with 1 kGy resulted in the disintegration of the pathogen’s hyphae. Increasing the irradiation dose to 3 kGy caused decay of the hyphae. Irradiation of infested stonewool with 5 kGy caused decrease of the pathogen population about 5 times. Application of 20 kGy completely eliminated the pathogen from stonewool. Irradiation of substratum resulted in significant increase of tomato seedlings healthiness, especially when the dose 20 kGy was applied.

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Khaled M. Almohamad and Fatima M. Alsheikh

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Ghassan Al-Massarani and Khaled Almohamad

to high altitude. Endothelium, 15(1), 53-58. DOI: 10.1080/10623320802092344. 21. Woywodt, A., Scheer, J., Hambach, L., Buchholz, S., Ganser, A., Haller, H., Hertenstein, B., & Haubitz, M. (2004). Circulating endothelial cells as a marker of endothelial damage in allogenic hematopoietic stem cell transplantation. Blood, 103(9), 3603-3605. DOI: 10.1182/blood-2003-10-3479. 22. Zeng, L., Yan, Z., Wang, L., Du, B., Pan, X., & Xu, K. (2008). Irradiation is an early determinant of endothelial injury during hematopoietic stem cell

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Javad Razjouyan, Hamidreza Zolata, Omid Khayat, Fereidoun Nowshiravan, Nami Shadanpour and Meisam Mohammadnia

., & Bulte, J. W. (2007). Applicability and limitations of MR tracking of neural stem cells with asymmetric cell division and rapid turnover. Magn. Reson. Med ., 58 , 261–269. DOI: 10.1002/mrm.21412. 11. Montet, X., Montet-Abou, K., Reynolds, F., Weissleder, R., & Josephson, L. (2006). Nanoparticle imaging of integrins on tumor cells. Neoplasia , 8 , 214–222. DOI: 10.1593/neo.05769. 12. Lee, J. H., Huh, Y. M., Jun, Y. W., Seo, J. W., Jang, J. T., Song, H. T., Kim, S., Cho, E. J., Yoon, H. G., Suh, J. S., & Cheon, J. (2007). Artificially engineered magnetic