1,721,065 research outputs found
Floricoltura sostenibile. Manuale e linee guida SUMFLOWER
No full textManuale e Linee Guida realizzati nell’ambito del Progetto Life+ 09ENV/IT/000067 SUMFLOWER con il contributo dello
strumento finanziario LIFE della Comunità Europe
Colonizzazione di un sito contaminato: il caso di Telephora terrestris Ehrh. e Pinus pinaster Aiton.
No full textValutazione dell’efficienza fotosintetica in risposta a stress da zinco nelle Pteridofite
No full textPhytotoxicity tests with higher plants for environmental risk assessment
No full textPhytotoxicity tests were performed to evaluate their
application in environmental monitoring on different
substrates, e.g. commercial detergents (D1, D2) and
surface water from the dismissed Cu and Fe mine of
Libiola (NW Italy), respectively.
Seeds of Vicia faba were grown in 0, 10, 30, 60, 100 g/l of
D1 and D2.
Number of germinated seeds and root length,
Germination Index (GI) and growth inhibition (EC50)
were considered. The Vicia test showed no signifi cant
differences between D1 and D2, with an EC50 of 13 g/l
(11-15 95% CI) for D1 and 16 g/l (14-19 95% CI) for D2.
These data were confi rmed by GI<50% at 18, 26, 30, 60
and 100 g/l.
Onion bulbs of Allium cepa, were tested at 0, 6, 12, 25, 50
and 100% of mine water. Root length inhibition (EC50)
and Mitotic Index (MI) were evaluated. The Allium
test showed a statistically signifi cant inhibition of root
growth at 50% and 100%. The root growth percentage
decreased in a dose-related manner, with an EC50
of 87%. The MI decreased signifi cantly only at 100%
(undiluted mine water).
Both phytotoxicity tests should be considered as valid
ecotoxicological indicators for health and environmen
Dispersal mechanisms in some reprentatives of the genus Moehringia L. (Caryophyllaceae)
No full textThe function of diaspores in Moehringia genus was investigated and field observations
pointed out the elaiosome role in seed predation and dispersal by ants. Histochemical
stainings underlined the presence of lipid in the strophiole.
Our results are congruent with the hypothesis that some representatives of the genus
Moehringia adopt myrmecochory, especially those species that prefer rocky habitats.
Strophiole dimensions and oil content volume seem to influence seed predation in plants
by ants. However, the interaction of further abiotic dispersal agents (wind, water) may
increase and make more efficient the dissemination strategie
Reproductive efficiency of Primula allionii: is this endemic plant really threatened?
No full textPrimula allionii is a primrose endemic to Maritime Alps. The plant was studied
in three different plots representing the different structures of cliffs where the
species usually lives. The reproductive success of the plant was analyzed in
order to evaluate its conservation status. Mean plant dimensions and
distribution within the plots were evaluated. The species resulted low morph
biased (0.13), very fertile (83.53%) and with a quite good sexual organs
efficiency of flowers (both in pin and thrum morphs) as demonstrated by the
high rate of fruit (52.18%) and seed production (20-50% ovules developed in
seeds). However, the populations remain in a demographic balance ( % =
0.38) and very few seedlings (0.21% of available seeds) were recorded in
populations. The particular habitat of the plant does not favour a consistent
population renewal. Primula allionii populations are not under a real threat at
present: but the species and its loci deserve much more consideration in the
future in order to preserve this possibly fragile habitat
- …
