Search results for "Botanica"
showing 10 items of 1665 documents
Contribution to the phytosociological characterization of the forest vegetation of the Sicani Mountains (inland of north-western Sicily).
2016
The results of a phytosociological survey on the main forest vegetation aspects of the Sicani Mountains (inland of north-western Sicily), in turn included in the homonymous Regional Park recently established, are presented. This expansive territory (43,687 hectares), located between the Agrigento and Palermo provinces, is mainly composed by carbonate and silico-carbonate formations of the Sicani Units, whose highest peaks are represented by Mount Cammarata (1578 m a.s.l.), Mount delle Rose (1436 m), Pizzo Cangialoso (1420 m) and Mount Pernice (1393 m). Under the bioclimatic aspect, the area falls within the thermo- and supramediterranean belts, with ombrotype ranging from upper dry (annual …
Plant morphology: outdated or advanced discipline in modern plant sciences?
2018
Despite an increasing societal awareness and sensitivity about biological diversity and nature conservation as pivotal matters for human survival and well-being, plant systematics has gone through a steady decline in interest, and researches on these topics are often neglected. This particularly applies to plant morphology in its broad sense (i.e. including anatomy, histology, micro-morphology), which has increasingly become marginalized and considered less important than other scientific methods in plant biology. Notwithstanding, even in the current times of genomics (plus other “omics” topics) and functional ecology, when trait-based approaches are essential for studying and understanding…
PLANT PRODUCTS TO CONTROL BIODETERIORATION OF CULTURAL ASSETS
2017
Fungi and bacteria are known as major biodeteriogens of cultural heritage, able to colonize, altering anddegrading a wide range of materials, such as metals, paints, paper, paperboard, rocks, photos, textiles, leather, plastics, etc. (1, 2). The use of traditional chemical biocides, to control microbial growth on cultural assets, has become a serious threat to public health and environment. The aim of this study has been to develop biocompatible antimicrobial compounds testing on specific taxa, that were isolated from biodeteriorated artifacts (books, papers, stones, woods, canvases) or environmental aerosols (museums, archives, libraries) and characterized by microscopy, in vitro culture a…
Physiological,anatomical and biomass partitioning responses to ozone in the Mediterranean endemic plant Lamottea dianae
2011
Ozone effects on the perennial forb Lamottea dianae were studied in an open-top chamber experiment. Ozone was found to induce reductions in CO 2 assimilation and water use efficiency in the leaves of this species. These reductions were mainly related to a decline in the in vivo CO 2 fixation capacity of Rubisco (V c,max), rather than to stomatal limitations or photoinhibitory damage (F v:F m). In addition to chloroplast degeneration, other observed effects were callose accumulation, formation of pectinaceous wart-like cell wall exudates and phloem alterations. Moreover, ozone exposure significantly reduced root dry biomass. The possible relevance of these adverse effects for Mediterranean f…
Mycochemical investigation of Pleurotus eryngii var. eryngii
2017
The mycochemical composition and structural characterization of the whole aqueous and methanolic extracts from Pleurotus eryngii var. eryngii are investigated. Two water-soluble glucans were obtained from the fruiting bodies by hot water extraction, ethanol precipitation, dialysis and Sephadex G-200 gel filtration. On the basis of total hydrolysis, methylation analysis, and NMR studies (1H, 13C, DQF-COSY, TOCSY, HSQC and HMBC) two fractions PEPS-1 and PEPS-2 were characterized and the structure of the repeating unit of the glucan were determined as linear (1→6)--glucan and (1→6)--glucan, respectively. The methanolic extract of Pleurotus eryngii var. eryngii was also investigated and a com…
Taxonomic identity, geographic distribution and commercial exploitation of the culinary-medicinal mushroom Pleurotus nebrodensis
This work provides an updated overview of an investigation carried out in Europe and elsewhere on the culinary-medicinal mushroom Pleurotus nebrodensis. In particular, the taxonomic identitiy of P. nebrodensis and other related oyster mushrooms with entirely white to cream basidiomata that grow on different plants of the family Apiaceae, is clarified. The differences in the cultivation techniques, the quality of product sold and the sales price in Europe and Asia are also highlighted. Taking also into consideration the importance of P. nebrodensis from the medicinal point of view, it appears appropriate to proceed with a verification of the commercial strains currently available in the inte…
I pleuroti delle ombrellifere in Sicilia
2012
Gli Autori dopo avere evidenziato le problematiche tassonomiche del genere Pleurotus con particolare riferimento alle specie che fruttificano sui residui radicali delle ombrellifere entrano nel merito del caso di studio di Plerutous nebrodensis, specie rara ed a rischio di estinzione.
Up-to-date distribution, ecology and cultivation of Pleurotus eryngii (DC.) Quél. var. thapsiae Venturella, Zervakis & Saitta in Sicily
2012
Venturella et al. [1] described a new taxon named Pleurotus eryngii (DC.) Quél. var. thapsiae Venturella, Zervakis & Saitta (Madonie Mts) on Thapsia garganica L. and provided ecological data on the locus classicus. P. eryngii var. thapsiae was reported on pastures evolved, from 1000 to 1500 m a.s.l., on limestone and is characterized by a double period of fructification (autumn and spring). P. eryngii var. thapsiae is a choice wild edible mushroom belonging to a special group of Pleurotus species which appear in nature in close association with Apiaceae plants. As part of the project's census of fungi in Sicily two new localities of growth were localized in the Natural Reserves of Capo Gall…
Pleurotus species suitable for commercial mushroom production in warm climates
2012
The genus Pleurotus in Italy
2015
On the basis of personal observations, herbarium specimens and, data reported in the literature the authors report morphological, ecological and distributive data on Pleurotus taxa from Italy. New descriptions are here provided based on the most distinctive-discriminating eco-morphological characters of twelve Pleurotus taxa.