Search results for " germplasm conservation"

Seed cryopreservation of Fraxinus angustifolia Vahl

2016

Fraxinus angustifolia is used for afforestation and for production of both valuable timber and manna , a substance with pharmacological applications. The aim of this research was to establish the optimized condition for cryopreservation of F. angustifolia seeds, in order to protect the germplasm of this species. Germination percentage and mean time of germination of non-treated seeds (control) and liquid nitrogen-treated seeds were established in water or in 10 -6 M gibberellic acid (GA 3 ). The seeds could be cryopreserved with 3% of moisture content (MC) and germinated easily in water (70.0 ± 5.0%), while seeds cryopreserved with 6% MC showed a physiological dormancy. This state could be …

Assessment of genetic variation in SicilianHelichrysum(Asteraceae) and implication to germplasm conservation

2008

Some taxa of Sicilian Helichrysum related to sect. Stoeachadina have an uncertain systematic position; moreover, they are rare and endangered. In order to preserve these taxa in a genebank, a strategy to keep their genetic variation as high as possible is required. The high informative content of AFLP markers was used to assess genetic variations within and between populations and their relationships. The results show that all populations are genetically similar, even though there are two distinct groups: the first is the population referred to H. pendulum, and the second is represented by other populations belonging to several different specific and intraspecific taxa. The H. pendulum popu…

APPROACHES TO STUDY BIODIVERSITY AND SALINITY TOLERANCE MECHANISMS IN MEDITERRANEAN FRUIT TREE SPECIES

Changes in global climate are going to increase the problem of drought and soil salinity in the Mediterranean area, where increases in temperature, drought and soil and water salinity are expected. Identification of plant genotypes with positive agronomic traits, such as salt tolerance, may reduce the effects of salinity and drought on productivity. Therefore, there is considerable effort being directed toward the development of salt-tolerant genotypes through plant breeding, with the aim to the introgression of salt-tolerance traits into new cultivars. The results presented in this thesis contributed to the develop of new tools to improve knowledge on the biodiversity and salinity toleranc…

THE BOTANICAL GARDEN “BERNARDINO DA UCRIA” IN THE NATURAL PARK OF THE NEBRODI (SICILY) AND ITS MISSION TO CONSERVE, EXPLOIT AND SPREAD LOCAL AGROBIOD…

2016

In Sicily, the academic botanical gardens of Catania, Messina and Palermo have been historically exerting a multiplicity of activities ranging from maintenance of ex situ collections to plant conservation policy, practice and ecological restoration, along with more traditional functions related to education and academic research. In the last decade’s, two new botanical gardens the “Nuova Gussonea” and the “Bernardino da Ucria, were created in Sicily, with the aim to play more delimited, yet modern and complementary roles. The garden “Nuova Gussonea”, within the Etna Natural Park, is mostly devoted to collect and preserve the native flora of the Mount Etna, with a special focus on endemic an…

Ecophysiology of germination in Sicilian population of Ferula communis (Umbelliferae)

2010

Ferula communis L. is an umbelliferous plant widespread in the Mediterranean basin and particularly abundant in Sicily and Sardinia islands (Italy). In this species, two chemotypes have been distinguished: one is poisonous and responsible of hemorrhagic syndrome of livestock, known as ferulosis, while the other one (non- poisonous) has anticancer activity due to the presence of daucane esters. In Sicily the dry stem of this plant has commercial applications in special manufactured products. The object of the research was to investigate the germination ecophysiology of nine Sicilian populations of F. communis, in order to establish the correct germplasm conservation of the chemotypes economi…