Search results for "ex situ"
showing 10 items of 39 documents
Botāniskā dārza sekciju "Augu daudzveidības pētījumi ex situ", "Augu selekcija un introdukcija" tēžu krājums (2017. gada 9. februāris, LU Botāniskais…
2017
Latvijas Universitātes 75. konferences Augu daudzveidības pētījumi ex situ un Augu selekcijas un introdukcijas sekcijas sēdes notiek 2017. gada 9. februārī, plkst. 13.00 LU Botāniskajā dārzā Kandavas ielā 2, Rīgā.
Genetic Distinctiveness Highlights the Conservation Value of a Sicilian Manna Ash Germplasm Collection Assigned to Fraxinus angustifolia (Oleaceae)
2020
The cosmopolitan genus Fraxinus comprises about 40 species occupying several habitats in the Northern Hemisphere. With some species hybridizing and sharing genetic variants, questions remain on the species assignment of germplasm within the genus Fraxinus despite numerous species-specific assessments. A multidisciplinary approach was employed to provide a definitive insight into the genetics of an endangered Fraxinus &ldquo
Degradation of stone materials in the archaeological context of the Greek-Roman Theatre in Taormina (Sicily, Italy)
2010
In the present work results on the degradation phenomena of stone materials in the Ancient Theatre of Taormina, one of the most important Greek–Roman monuments of Sicily, are reported. Artificial stone materials in different conservation conditions were investigated. Samples of salt efflorescences from brick walls and degraded setting mortars were taken from the open gallery in “summa cavea”. The chemical, physical and structural characterization was performed by means of X-Ray Photoelectron Spectroscopy (XPS), X-Ray Diffraction (XRD) and X-Ray Fluorescence (XRF), both in situ and ex situ. Results showed that the deterioration of stone materials is due to the aggressive action of the enviro…
The “Sicilian Plant Germplasm Repository” of the University of Palermo: 25 years of activity in biological conservation
2018
The “Sicilian Plant Germplasm Repository” was created in 1993 from the Department of Botanical Sciences of the University of Palermo (SGCR/PA) – today section of Botany and Plant Ecology of the Department “STEBICEF” - with the aim to preserve the genetic diversity of endemic or endangered native plants, species of economical relevance and wild progenitors of plant cultivars. The collections are mostly constituted by seeds, and were recently expanded with tissues and DNA accessions. The specific tasks of SPGR/PA include the short- and long-term ex situ conservation and exchange of seeds, the recovery of the phytogenetic heritage, the reintroduction of threatened or endangered species into th…
Botanical Garden
2013
The Botanical Garden of the University of Latvia was founded in 1922. In the 15 hectare territory of the garden you can find greenhouses and outdoor collections with about 6000 different plants from the dunes of the Baltic sea, forests of Australia, jungle of the Amazon, mountains of Caucasus, deserts of Mexico and Far East representing different regions of the world.
The Genebank database of Palermo's Botanical Garden
2010
Translocation of meadow, heath and fen to the habitat garden : the first insights after 4 years of the experiment
2018
Is in vitro micrografting a possible valid alternative to traditional micropropagation in Cactaceae? Pelecyphora aselliformis as a case study
2016
Several taxa of Cactaceae are endangered by overcollection for commercial purposes, and most of the family is included in the Convention on International Trade in Endangered Species of Fauna and Flora (CITES). Micropropagation may play a key role to keep the pressure off wild populations and contribute to ex situ conservation of endangered taxa. One of the limits of micropropagation is the species-specific requirement of plant regulators for each taxon and sometimes even for different genotypes. With the micrografting technique the rootstock directly provides the scion with the necessary hormonal requirements. In this paper we present data on in vitro grafting of Pelecyphora aselliformis Eh…
IN-VITRO REGENERATION OF CALENDULA MARITIMA GUSS. (ASTERACEAE), A THREATENED PLANT ENDEMIC TO WESTERN SICILY
2016
Calendula maritima is a critically endangered endemic plant of Western Sicily. Besides habitat destruction, the hybridization with the contiguous congener species C. fulgida is a major threat to its conservation. For this reason, seed-based propagation and seed storage are not appropriate for conservation purposes. In the present paper we describe a rapid and prolific in vitro plant regeneration method by direct organogenesis from leaves of C. maritima. Leaf explants were cultured on solid Murashige and Skoog (MS) medium in the presence of several plant growth regulator combinations. The best shoot multiplication rate (2.5 shoots/explant) was obtained on the medium containing 4.4 µM 6-benzy…