Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2006.231.237Glycine max L.]]>EnteshariSh. KalantariKh. GhorbanliM. 2200692The effect of different bands of UV-radiation and epibrassinosteroid treatments on the quantity of chlorophyll a,b, total chlorophyll, anthocyanine, carotenoid, flavonoids and UV absorbing compounds in leaves of the Glycine max were studied. In this study plants were sprayed with epibrassinosteroid and treated with UV-A (2.73 Wm-2), UV-B (1.15 Wm-2) and UV-C (2.66 Wm-2). Studied showed that in those plants which were treated with UV-A, the contents of these pigments were not significantly different when compared with control. While irradiation of the plants with UV-B and UV-C significantly caused decrease in chlorophyll a, b, total chlorophyll and carotenoids. Epibs treatment moderated chlorophyll and carotenoid reduction in those plants that treated with UV-B and UV-C. Decrease in carotenoid were less significant when compared with chlorophyll. The quantity of antocyanines, flavonoids and UV absorbing compounds in plants that treated with UV-B,UV-C and epibs were significantly increased. These pigments have high absorption in UV spectrum of light and therefore could be used as UV-absorbing compounds by plants to prevent penetration of UV to the more sensitive tissues. The role of flavonoids in quenching of Hydrogen peroxide and other species of active oxygen could well describe. The defensive reaction of plants against UVradiation and epibrassinosteroid will discussed in this study.]]>Al-Oudat, M., S.A. Baydouns and A. Mohammad,1998Triticume durum var. Horani) and broad beans (Vicia faba) under field conditions.]]>401116Allen, D.J., S. Nogues and R.N. Baker,199843121130Bajguz, A.,200038209215Bajguz, A.,2000Chlorella vulgaris cells by 24-epibrassinolide.]]>38797801Barsig, M. and R. Malz.,200043121130Caldwell, M.M., A.H. Teramura and M. Tevini,199514166173Gould, K.S., K.R. Markham, R.H. Smith and J.J. Goris,2000Quintinia serrata A. Cunn.]]>5111071115Gitz, D.C., L.L. Gitz, S.J. Britz and J.H. Sullivan,200453343355Hallbrok, K., K.H. khobloch, F.J. Kreuzaler, R.M. potts, and E. wellmann,197661199200Hofmann, W., E.E. Swing, S.J. Bloork, R.R. Markham, K.G. Ryan, B.D. Campbell, B.R. Jordan and D.W. Fountain,2000Trifolium repens L. Populations to ultraviolet-B radiation: Differential flavonol glycoside accumulation and biomass production.]]>86527573Inze, D. and M.V. Montagu,2002pp: 1-33pp: 1-33Khripach, V., V. Zhabinskii and A. de Groot,200086441447Khripach, V.A., V.N. Zhabinskii and A.E. deGroot,1999pp: 263-299pp: 263-299Krishna, P.,200322289297Krizek, D.T., S.J. Britz and R.M. Mirecki,199810317Li, J. and J. Chory,199950245282Li, J.T., M. Raba, R.R.G. Amundson and R.L. Last,19935141149Lichtenthaler, H.K.,1987148350382Liydmila, V.,20022002Mackerness, S.A., B.H. Thomas and B.R. Jordan,1997Pisum sativu L.]]>48729738Middleton, E.M. and A.H. Termura,1993103741752Ozdemir, F., B. Melike, T. Demiral and I. Turkan,2004Oryza sativa L.) under salinity stress.]]>42203211Salram, R.K.,199414173181Sharma, P.K., P. Anand S. Sankhalkar and R. Shetye,19981322130Sarma, D., Y. Sreelakhsmi and R. Sharma,199745671674Takahashi, A., K. Takeda and T. Ohnishi,199132541547Takeuchi, A., T. Yamaguchhi, J. Hidema, A. Stride and T. kumagai,2002Oryza sativa L.) growing under supplementary UV-B radiation.]]>25695706Tanaka, K., Y. Nakomura, T. Asami, Sh. Yoshida, T. Matsuo and S. Okamoto,200332259271Wagner, G.J.,1979648893Woodall, G.S. and G.R. Stewart,19984914471450Yanqun, Z., L. Yuan, C.J. Haiyan and C. Lanjun,2003508797