An enhancing effect of visible light and UV radiation on phenolic compounds and various antioxidants in broad bean seedlings.
Exposure of dark- or ambient visible light-grown broad bean seedlings to low (LL) and high (HL) visible light intensities, UV-A or UV-C, either alone or in combination, induced significant increases in total phenolic compounds as well as in anthocyanins content, throughout the germination period, as compared with the respective levels in control seedlings. In general, as compared with control levels, exposure of both dark- or light-grown broad bean seedlings to LL, HL, UV-A or UV-C, induced significant increases in the contents of non-enzymatic antioxidants (total ascorbate; ASA-DASA and total glutathione; GSSG-GSH) and enzymatic antioxidant activities (superoxide dismutase; SOD, catalase; CAT, ascorbate peroxidase; APO and glutathione reductase; GR). The obtained results are discussed in relation to induced mechanisms of protection and repair from the inevitable exposure to damaging visible light and UV-radiation.
Younis
Mahmoud El-Baz
Mel-B
Department of Botany, Faculty of Science, Mansoura University, Egypt. me_younis@mans.edu.eg
Hasaneen
Mohammed Naguib Abdel-Ghany
MN
Abdel-Aziz
Heba Mahmoud Mohammed
HM
D000042:Absorption / Q000528:radiation effects; D000975:Antioxidants / Q000528:radiation effects*; D060387:Ascorbate Peroxidases; D001205:Ascorbic Acid / Q000378:metabolism; D002374:Catalase / Q000378:metabolism; D018525:Germination / Q000528:radiation effects; D019803:Glutathione Disulfide / Q000378:metabolism; D005980:Glutathione Reductase / Q000378:metabolism; D010544:Peroxidases / Q000378:metabolism; D010636:Phenols / Q000528:radiation effects*; D036226:Seedlings / Q000378:metabolism* / Q000528:radiation effects*; D013482:Superoxide Dismutase / Q000378:metabolism; D014466:Ultraviolet Rays; D031307:Vicia faba / Q000201:enzymology / Q000378:metabolism* / Q000528:radiation effects*
D000975:Antioxidants; D010636:Phenols; D010544:Peroxidases; D060387:Ascorbate Peroxidases; D002374:Catalase; D013482:Superoxide Dismutase; D005980:Glutathione Reductase; D001205:Ascorbic Acid; D019803:Glutathione Disulfide