ULTRAVIOLET-B (280-320 NM) ABSORBING PIGMENTS IN THE LEAVES OF SILENEVULGARIS - THEIR ROLE IN UV-B TOLERANCE

Citation
Jwm. Vandestaaij et al., ULTRAVIOLET-B (280-320 NM) ABSORBING PIGMENTS IN THE LEAVES OF SILENEVULGARIS - THEIR ROLE IN UV-B TOLERANCE, Journal of plant physiology, 147(1), 1995, pp. 75-80
Citations number
46
Categorie Soggetti
Plant Sciences
Journal title
ISSN journal
01761617
Volume
147
Issue
1
Year of publication
1995
Pages
75 - 80
Database
ISI
SICI code
0176-1617(1995)147:1<75:U(NAPI>2.0.ZU;2-5
Abstract
The UV-B radiation tolerant perennial herb Silene vulgaris was tested on the influence of incident UV-B fluxes during growth on the synthesi s of UV-B absorbing pigments in the leaves. Analysis of methanolic lea f extracts showed a stimulating effect of UV-B on the absorbing abilit y of leaf extracts. HPLC analysis made clear that UV-B radiation stimu lated extractable flavonoid concentrations in leaves, but that UV-B ab sorption could only be partly attributed to these flavonoids. The cont ribution of flavonoids to UV-B absorption diminishes if plants mature. Other possible functions of flavonoids in plants growing under elevat ed UV-B conditions are discussed.