Ultraviolet-B radiation effects on the Mediterranean ruderal Dittrichia viscosa

1997 ◽  
pp. 109-112
Author(s):  
M. Stephanou ◽  
Y. Manetas
Keyword(s):  
Radiation Effects ◽  
Ultraviolet B ◽  
Ultraviolet B Radiation ◽  
Dittrichia Viscosa ◽  
The Mediterranean

scholarly journals Effects of experimental warming and increased ultraviolet B radiation on the Mediterranean plankton food web

2010 ◽  
Vol 56 (1) ◽  
pp. 206-218 ◽  
Author(s):  
Francesca Vidussi ◽  
Behzad Mostajir ◽  
Eric Fouilland ◽  
Emilie Le Floc'h ◽  
Jean Nouguier ◽  
...  
Keyword(s):  
Food Web ◽  
Ultraviolet B ◽  
Experimental Warming ◽  
Ultraviolet B Radiation ◽  
The Mediterranean

Suspended Sediment as an Attenuating Factor of Ultraviolet-B Radiation Effects on the Growth and DNA Damage of Chlorella Sp.

2012 ◽  
Vol 518-523 ◽  
pp. 5165-5171
Author(s):  
Yun Li ◽  
Yao Jia Huang ◽  
Xiao Rong Wang
Keyword(s):  
Dna Damage ◽  
Cell Growth ◽  
Suspended Sediment ◽  
Coastal Waters ◽  
Radiation Effects ◽  
Ultraviolet B ◽  
Light Penetration ◽  
Ultraviolet B Radiation ◽  
Laboratory Conditions ◽  
Chlorella Sp

Effects of enhanced ultraviolet-B (UV-B) radiation and suspended sediment (SS) separately as well as in combination on the growth and DNA damage of Chlorella sp. were studied under controlled laboratory conditions. The Chlorella sp. was exposed to UV-B of 17 µW cm-2for 0, 1 and 5 minutes in 0, 500 and 5000 mg L-1defined SS. The results showed that SS attenuated light penetration and suppressed the growth ofChlorellasp.. It also attenuated UV-B induced DNA damage and promoted the cell growth. The suppression and promotion of cell growth depended on the concentration of SS and dose of UV-B radiation. These results are important in understanding of the effects of elevated UV-B radiation on microalgae in sediments-dominate coastal waters.

Ultraviolet‐B Radiation Effects on Growth and Physiology of Four Rice Cultivars

Crop Science ◽  
1992 ◽  
Vol 32 (5) ◽  
Author(s):  
Qiujie Dai ◽  
Victoria P. Coronel ◽  
Benito S. Vergara ◽  
Paul W. Barnes ◽  
Arlene T. Quintos
Keyword(s):  
Radiation Effects ◽  
Ultraviolet B ◽  
Rice Cultivars ◽  
Ultraviolet B Radiation

Allelopathic and Water Conserving Functions of Leaf Epicuticular Exudates in the Mediterranean Shrub Dittrichia viscosa

1995 ◽  
Vol 22 (5) ◽  
pp. 755 ◽  
Author(s):  
M Stephanou ◽  
Y Manetas
Keyword(s):  
Water Conservation ◽  
Laboratory Experiments ◽  
Photochemical Efficiency ◽  
Ultraviolet B ◽  
Water Soluble ◽  
Considerable Decrease ◽  
Ultraviolet B Radiation ◽  
Lettuce Seeds ◽  
Dittrichia Viscosa ◽  
Mediterranean Shrub

The possible ecophysiological roles of the water soluble, epicuticular material accumulated on the leaves of Dittrichia viscosa (L.) W.Greuter (syn. Inula viscosa (L.) Aiton) (Asteraceae), were investigated in laboratory experiments. It was found that: (a) the material reduced cuticular transpiration; (b) it had a strong absorbance in the ultraviolet, apparently offering the leaves an ultraviolet-B radiation screen; (c) removal of this material, however, and exposure of the leaves to visible light supplemented with ultraviolet-B radiation had no effects on photosystem II photochemical efficiency or stomatal functions and caused no epidermal browning; and (d) the material was strongly inhibitory against germination of lettuce seeds and caused considerable decrease in the radicle length of Phlomis fruticosa L., a species often occupying the same habitat as D. viscosa. We infer from the above that D. viscosa leaves may be resistant to ultraviolet-B radiation damage and, accordingly, the water conservation and allelopathic functions of the epicuticular material may predominate over its potential to protect against ultraviolet-B radiation.

Ultraviolet-B radiation effects on natural phytoplankton assemblages of central San Francisco Bay

Estuaries ◽  
2005 ◽  
Vol 28 (2) ◽  
pp. 190-203 ◽  
Author(s):  
Victoria E. Hogue ◽  
Frances P. Wilkerson ◽  
Richard C. Dugdale
Keyword(s):  
San Francisco ◽  
Radiation Effects ◽  
San Francisco Bay ◽  
Ultraviolet B ◽  
Phytoplankton Assemblages ◽  
Ultraviolet B Radiation ◽  
Natural Phytoplankton

Ultraviolet-B Radiation Effects on Antioxidant Status and Survival in the Zebrafish, Brachydanio rerio¶

2007 ◽  
Vol 72 (3) ◽  
pp. 327-333 ◽  
Author(s):  
Richard A. Charron ◽  
James C. Fenwick ◽  
David R. S. Lean ◽  
Thomas W. Moon
Keyword(s):  
Antioxidant Status ◽  
Radiation Effects ◽  
Ultraviolet B ◽  
Brachydanio Rerio ◽  
Ultraviolet B Radiation

Ultraviolet-B radiation effects on phenolic profile and flavonoid content of Kalanchoe pinnata

2015 ◽  
Vol 148 ◽  
pp. 73-81 ◽  
Author(s):  
Luana Beatriz dos Santos Nascimento ◽  
Marcos Vinicius Leal-Costa ◽  
Eloá Aragão Menezes ◽  
Virgínia Rodrigues Lopes ◽  
Michelle Frazão Muzitano ◽  
...  
Keyword(s):  
Radiation Effects ◽  
Ultraviolet B ◽  
Flavonoid Content ◽  
Phenolic Profile ◽  
Ultraviolet B Radiation ◽  
Kalanchoe Pinnata
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