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. 2010 Oct;5(10):1197-203.
doi: 10.4161/psb.5.10.11978. Epub 2010 Oct 1.

An enhancing effect of visible light and UV radiation on phenolic compounds and various antioxidants in broad bean seedlings

Mahmoud El-Baz Younis  1 , Mohammed Naguib Abdel-Ghany Hasaneen, Heba Mahmoud Mohammed Abdel-Aziz
Affiliations

An enhancing effect of visible light and UV radiation on phenolic compounds and various antioxidants in broad bean seedlings

Mahmoud El-Baz Younis et al. Plant Signal Behav. 2010 Oct.

Abstract

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.

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Figures

Figure 1
Figure 1
(A) The effects of low visible light (LL) or UV radiations (UV-A and UV-C) on UV-absorbing compounds in Vicia faba seedlings germinated in darkness. (-▪- Control; -▴- LL; -•- UV-C; -x- LL + UV-C; -▵- UV-A; -○- LL + UV-A). Vertical bars represent the standard error (±S.E.). (B) The effects of high visible light (HL) or UV-C radiations on UV-absorbing compounds in Vicia faba seedlings germinated in ambient light. (-▪- Control; -▴- HL; -•- UV-C; -x- HL + UV-C). Vertical bars represent the standard error (± S.E.).
Figure 2
Figure 2
(A) The effects of low visible light (LL) or UV radiations (UV-A and UV-C) on antioxidant compounds; total ascorbate (ASA + DASA) and total glutathione (GSSG + GSH) in Vicia faba seedlings germinated in darkness. (-▪- Control; -▴- LL; -•- UV-C; -x- LL + UV-C; -▵- UV-A; -○- LL + UV-A). Vertical bars represent the standard error (±S.E.). (B) The effects of high visible light (HL) or UV-C radiation on antioxidant compounds; total ascorbate (ASA + DASA) and total glutathione (GSSG + GSH) in Vicia faba seedlings germinated in ambient light. (-▪- Control; -▴- HL; -•- UV-C; -x- HL + UV-C). Vertical bars represent the standard error (±S.E.).
Figure 3
Figure 3
(A) The effects of low visible light (LL) or UV radiations (UV-A and UV-C) on antioxidant enzyme activities; superoxide dismutase, ascorbate peroxidase, catalase and glutathione reductase in Vicia faba seedlings germinated in darkness. (-▪- Control; -▴- LL; -•- UV-C; -x- LL + UV-C; -▵- UV-A; -○- LL + UV-A). Vertical bars represent the standard error (± S.E.). (B) The effects of high visible light (HL) or UV-C radiation on antioxidant enzyme activities; superoxide dismutase, ascorbate peroxidase, catalase and glutathione reductase in Vicia faba seedlings germinated in ambient light. (-▪- Control; -▴- HL; -•- UV-C; -x- HL + UV-C). Vertical bars represent the standard error (± S.E.).
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References

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MeSH terms