Search results for "Rhizome"
showing 4 items of 34 documents
AQUEOUS EXTRACTS FROM LEAVES AND RHIZOMES OF THE MARINE SEAGRASS POSIDONIA OCEANICA EXHIBIT ANTI-LIVER CANCER ABILITY IN VITRO
2022
A New Steroidal Saponin from Dioscorea cayenensis
2004
The new 26-O-beta-D-glucopyranosyl-3beta,26-dihydroxy-20,22-seco-25(R)-furost-5-en-20,22-dione-3-O-alpha-L-rhamnopyranosyl-(1-->4)-alpha-L-rhamnopyranosyl-(1-->4)-[alpha-L-rhamnopyranosyl-(1-->2)]-beta-D-glucopyranoside (1), along with the known methyl protodioscin (2), asperoside (3) and prosapogenin A of dioscin (4) were isolated from the rhizomes of Dioscorea cayenensis LAM.-HOLL (Dioscoreaceae). Their structures were established mainly on the basis of 600 MHz 2D-NMR spectral data. 4 exhibited antifungal activity against the human pathogenic yeasts Candida albicans, C. glabrata and C. tropicalis (MICs of 20.8, 6.25, 25 microg/ml, respectively), whereas saponins 1-3 were inactive.
Effetto della posizione degli ovoli sulla produttività del carciofo spinoso di sicilia
2010
In Sicily, the Spinoso di Sicilia artichoke is appreciated at regional level for its organoleptic characteristics, but in recent years, its cultivation area has been subject to a progressive reduction because of its susceptibility at the atrophy of head, low earliness, low productivity, and lack of uniformity of the productions. These problems are due to genetic variability, diseases and disforme propagation material (ovoli). This study was conducted to evaluate the influence of the ovoli position (apical, median and basal) in the rhizome of mother plants on morpho-phisiological and productive aspects of the artichokes. The results showed that basal ovoli gave faster growth, better plant co…
Modelling the relationship between sexual reproduction and rhizome growth in Posidonia oceanica (L.) Delile
2006
The relationship between flowering and growth performance of Posidonia oceanica (L.) Delile in meadows distributed along the south-eastern coast of Sicily (Italy) was investigated by means of a statistical model (generalized linear mixed model) combined with the lepidochronological analysis. Over a 28-year period, 67 floral stalk remains were observed. The highest flowering index was recorded in lepidochronological year 1998 (10.1%) and the Inflorescence Frequency per age showed a clear decrease corresponding to 15-year-old shoots. The sexual reproductive event had positive effects on rhizome elongation (cm year−1) and leaf production (no. leaves year−1) in the same flowering year, whilst n…