Nutritional differentiation among populations of the mediterranean shrub Dittrichia viscosa (Asteraceae) in siliceous and calcareous habitats

Oecologia ◽  
1992 ◽  
Vol 92 (1) ◽  
pp. 14-22 ◽  
Author(s):  
J. P. Wacquant ◽  
J. Baus Picard
Keyword(s):  
Dittrichia Viscosa ◽  
The Mediterranean ◽  
Mediterranean Shrub

scholarly journals Gene expression induced by chronic ozone in the Mediterranean shrub Phillyrea latifolia: analysis by cDNA-AFLP

2007 ◽  
Vol 27 (11) ◽  
pp. 1541-1550 ◽  
Author(s):  
A. R. Paolacci ◽  
C. Miraldi ◽  
O. A. Tanzarella ◽  
M. Badiani ◽  
E. Porceddu ◽  
...  
Keyword(s):  
Gene Expression ◽  
Phillyrea Latifolia ◽  
The Mediterranean ◽  
Mediterranean Shrub

Seasonal variations in UV-B absorbing capacity and allelopathic potential of Dittrichia viscosa leaf rinsates

1997 ◽  
Vol 75 (8) ◽  
pp. 1371-1374 ◽  
Author(s):  
M. Stephanou ◽  
Y. Manetas
Keyword(s):  
Seed Germination ◽  
Competitive Advantage ◽  
Key Words ◽  
Seasonal Variations ◽  
Water Soluble ◽  
Seasonal Fluctuations ◽  
Allelopathic Potential ◽  
Dittrichia Viscosa ◽  
The Mediterranean ◽  
Allelopathic Interference

The seasonal variations in the amount and the allelopathic potential of the water-soluble, leaf epicuticular exudates in the Mediterranean ruderal Dittrichia viscosa were investigated. Both parameters peaked during the dry, hot, and sunny summer, confirming the prediction that the seasonal fluctuations should be commensurate with the ascribed antitranspirant and phytotoxic functions. In particular, the drainage of the material to the soil with the heavy autumn rains provides excellent timing for exerting its strong allelopathic interference on seed germination, affording D. viscosa a considerable competitive advantage. Key words: allelopathy, Dittrichia viscosa, leaf rinsates, seasonal variations.

scholarly journals Dittrichia Viscosa L. Greuter: Phytochemistry and Biological Activity

2008 ◽  
Vol 3 (11) ◽  
pp. 1934578X0800301
Author(s):  
Alejandro F. Barrero ◽  
M. Mar Herrador ◽  
Pilar Arteaga ◽  
Julieta V. Catalán
Keyword(s):  
Biological Activity ◽  
Mediterranean Region ◽  
Biological Activities ◽  
Dittrichia Viscosa ◽  
The Mediterranean ◽  
Anti Inflammatory

Dittrichia viscosa is a plant widely distributed in the Mediterranean region. This species and its components present a broad range of biological activities (for example, anti-inflammatory, antifungal, antiulcer, antiviral, antiparasitic), which are reviewed. Extracts of the species are particularly rich in terpenoids, in particular eudesmane acids, notably ilicic acid (45) and α-costic acid (44). Flavonoids are also abundant, especially during flowering.

scholarly journals Simulated climate change provokes rapid genetic change in the Mediterranean shrub Fumana thymifolia

2007 ◽  
Vol 14 (3) ◽  
pp. 637-643 ◽  
Author(s):  
ALISTAIR S. JUMP ◽  
JOSEP PEÑUELAS ◽  
LAURA RICO ◽  
ELISENDA RAMALLO ◽  
MARC ESTIARTE ◽  
...  
Keyword(s):  
Climate Change ◽  
Genetic Change ◽  
Simulated Climate ◽  
The Mediterranean ◽  
Mediterranean Shrub ◽  
Simulated Climate Change

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.

Sign in / Sign up

Export Citation Format

Share Document