Search results for "Periploca"

The loss of dispersal on islands hypothesis revisited: Implementing phylogeography to investigate evolution of dispersal traits in Periploca (Apocyna…

2017

Aim: The loss of dispersal on islands hypothesis (LDIH) posits that wind-dispersed plants should exhibit reduced dispersal potential, particularly if island populations are old. In this study, we tested this hypothesis using a detailed phylogeographical framework across different geographical scales. Location: Mainland and island areas of the Atlantic and Mediterranean regions, including Macaronesia (Canary Islands and Cape Verde) and Mediterranean islands in the strait of Sicily. Methods: Forty-five populations of Periploca laevigata, a wind-dispersed shrub, were sampled. Plastid and nuclear microsatellite data were used to reconstruct spatio-temporal patterns of island colonization, and e…

THE ROLES OF PLANT VOLATILES AND THEIR POTENTIAL USE AS FLY ATTRACTANTS

2014

The essential oils composition of the skin, pulp and seeds from fruits of two Sicilian cultivars of Opuntia ficus-indica (cv. Sanguigna and cv. Surfarina has been obtainedby hydrodistillation and the possible semiochemical roles have been investigated comparing the data with those reported in the literature. Several compounds identified in this study have been reported to influence the behaviour of Ceratitis capitata, a phytophagous which causes severe damages to severalcrops including O. ficus-indica and the kairomonal activity of the odour of the fruits seems provided by a blend of compounds found in the various matrices analysed. In sapromyiophilous plants, up to date, long range attract…

Floral volatiles in a sapromyiophilous plant and their importance in attracting house fly pollinators

2015

Floral scent in sapromyiophilous plants often consists of complex blends with not only fetid (e.g., sulfides) but also sweet (e.g., terpenoids) volatile organic compounds and a recent study suggests that both groups of compounds are involved in pollinator attraction. However, little is known about the number and identity of compounds involved in pollinator attraction in these deceptive plants that mimic breeding sites of fly pollinators. In the present paper, we studied flower volatiles of sapromyiophilous Periploca laevigata and their capability to elicit biological responses in one of the pollinator species, Musca domestica. Floral volatiles were collected by dynamic headspace and analyse…

Contributo allo studio morfoanatomico e micromorfologico fogliare di elementi espressivi della Flora siciliana: Periploca laevigata subsp. angustifol…

2009

ECOLOGIA DELL' IMPOLLINAZIONE DI PERIPLOCA LAEVIGATA SUBSP ANGUSTIFOLIA ( LABILL.) MARKGRAF ( APOCYNACEAE-PERIPLOCOIDEAE ) E CALLUMA EUROPEA N.E.BR. …

2011

Ecologia dell'impollinazione di Periploca laevigata subsp. angustifolia (Labill.) Markgraf (Apocynaceae-Periplocoideae) e Caralluma europaea N.E.Br. …

2011

Do island plant populations really have lower genetic variation than mainland populations? Effects of selection and distribution range on genetic div…

2015

Ecological and evolutionary studies largely assume that island populations display low levels of neutral genetic variation. However, this notion has only been formally tested in a few cases involving plant taxa, and the confounding effect of selection on genetic diversity (GD) estimates based on putatively neutral markers has typically been overlooked. Here, we generated nuclear microsatellite and plastid DNA sequence data in Periploca laevigata, a plant taxon with an island–mainland distribution area, to (i) investigate whether selection affects GD estimates of populations across contrasting habitats; and (ii) test the long-standing idea that island populations have lower GD than their mai…

Essential oil composition of the fruits of Periploca laevigata Aiton subsp. angustifolia (Labill.) Markgraf (Apocynaceae – Periplocoideae)

2011

The essential oil of the fruits of Periploca laevigata Aiton subsp. angustifolia (Labill.) Markgraf (Apocynaceae) from Lampedusa Island was obtained by hydrodistillation and its composition was analysed. The analyses allowed the identification and quantification of 64 volatile compounds belonging to different classes. The most abundant compounds were nonacosane, heptacosane, hentriacontane and δ-cadinene. Among the volatile compounds identified in the fruits of P. laevigata subsp. angustifolia, 31 are present in other taxa of Apocynaceae, 19 have antimicrobial activity and four are pheromones for the butterfly Danaus chrysippus. The possible ecological role of the volatile compounds found i…

Periploca laevigata Aiton subsp. angustifolia (Labill.) Markgraf on Lampedusa Island

2012

Periploca laevigata Aiton subsp. angustifolia (Labill.) Markgraf [synonym: Periploca laevigata Labill.] (Apocynaceae – Periplocoideae sensu Endress & Bruyns 2000) is a Mediterranean-Saharan element growing wild in the low and middle Mediterranean basin and descending southwards to the northern and central Sahara. It is found in North Africa (from Morocco to Egypt), southern Spain, Sicily, Malta, Crete, Lebanon and Syria (Ghrabi 2005). In Sicily it is reported only from some Sicilian Islands: Egadi, Pantelleria, Lampedusa and Linosa (Pignatti 1982). In this paper we report some unpublished data and a summary of information of recent publications on P. laevigata subsp. angustifolia made durin…

First records of pollinators of two co-occurring Mediterranean Apocynaceae

2011

This article presents results of a field survey of pollinators of two Apocynaceae, Periploca laevigata subsp. angustifolia (Labill.)Markgraf (Periplocoideae) and Caralluma europaea (Guss.) N.E.Br. Asclepiadoideae) co-occurring on Lampedusa Island, Mediterranean sea. Fifteen species within nine families of Diptera have been identified as pollinators of the two plants. The families involved are Tephritidae, Milichiidae, Trixoscelididae, cathophagidae, Anthomyiidae, Muscidae, Calliphoridae, Sarcophagidae, Rhinophoridae. Families of Muscidae and Sarcophagidae are the more represented, respectively with four and three species. P. laevigata subsp. angustifolia seems to have a broader spectrum of …