Scabiosa

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 945 Experts worldwide ranked by ideXlab platform

Christer Lofstedt - One of the best experts on this subject based on the ideXlab platform.

  • odour mediated nectar foraging in the silver y moth autographa gamma lepidoptera noctuidae behavioural and electrophysiological responses to floral volatiles
    Oikos, 2002
    Co-Authors: Dainius Plepys, Fernando Ibarra, Wittko Francke, Christer Lofstedt
    Abstract:

    Naive male and female silver Y moths, Autographa gamma (Lepidoptera: Noctuidae), were attracted in a flight tunnel assay to potted creeping thistle, Cirsium arvense (Asteraceae), butterfly-orchid, Platanthera bifolia (Orchidaceae), soapwort, Saponaria officinalis (Caryophyllaceae), greater knapweed, Centaurea Scabiosa (Asteraceae), red clover, Trifolium pratense (Fabaceae), and catnip, Nepeta faasseni (Labiatae), plants with flowers. The most attractive plants were C. arvense, P. bifolia and S. officinalis that elicited 87, 78 and 65% source contacts, respectively. C. Scabiosa was less attractive eliciting 43% response. T. pratense and N. faasseni showed the least attraction eliciting 28 and 26% source contacts, respectively. A cotton plant used as control, was not attractive. Floral volatiles from the investigated plant species were collected using headspace sampling technique. Samples were analysed using gas chromatography coupled with electroantennographic detection, and electrophysiologically active compounds were identified by coupled gas chromatography/mass spectrometry. Consistent electrophysiological responses were elicited by twelve compounds from headspace of C. arvense, thirteen compounds from P. bifolia, eleven compounds from S. officinalis, nine from C. Scabiosa, ten from T. pratense and two from N. faasseni. Most of the active compounds were specific for one or two species, while benzyl benzoate was present in four and benzaldehyde and benzyl alcohol in three species. Floral scents of C. arvense, P. bifolia and S. officinalis, the most attractive flowers, were dominated by aromatic compounds that were not abundant in the scent of other flowers. To conclude, the results demonstrate the absence of a common denominator of odours present in flowers of different plants visited by A. gamma.

Dainius Plepys - One of the best experts on this subject based on the ideXlab platform.

  • odour mediated nectar foraging in the silver y moth autographa gamma lepidoptera noctuidae behavioural and electrophysiological responses to floral volatiles
    Oikos, 2002
    Co-Authors: Dainius Plepys, Fernando Ibarra, Wittko Francke, Christer Lofstedt
    Abstract:

    Naive male and female silver Y moths, Autographa gamma (Lepidoptera: Noctuidae), were attracted in a flight tunnel assay to potted creeping thistle, Cirsium arvense (Asteraceae), butterfly-orchid, Platanthera bifolia (Orchidaceae), soapwort, Saponaria officinalis (Caryophyllaceae), greater knapweed, Centaurea Scabiosa (Asteraceae), red clover, Trifolium pratense (Fabaceae), and catnip, Nepeta faasseni (Labiatae), plants with flowers. The most attractive plants were C. arvense, P. bifolia and S. officinalis that elicited 87, 78 and 65% source contacts, respectively. C. Scabiosa was less attractive eliciting 43% response. T. pratense and N. faasseni showed the least attraction eliciting 28 and 26% source contacts, respectively. A cotton plant used as control, was not attractive. Floral volatiles from the investigated plant species were collected using headspace sampling technique. Samples were analysed using gas chromatography coupled with electroantennographic detection, and electrophysiologically active compounds were identified by coupled gas chromatography/mass spectrometry. Consistent electrophysiological responses were elicited by twelve compounds from headspace of C. arvense, thirteen compounds from P. bifolia, eleven compounds from S. officinalis, nine from C. Scabiosa, ten from T. pratense and two from N. faasseni. Most of the active compounds were specific for one or two species, while benzyl benzoate was present in four and benzaldehyde and benzyl alcohol in three species. Floral scents of C. arvense, P. bifolia and S. officinalis, the most attractive flowers, were dominated by aromatic compounds that were not abundant in the scent of other flowers. To conclude, the results demonstrate the absence of a common denominator of odours present in flowers of different plants visited by A. gamma.

R Van Treuren - One of the best experts on this subject based on the ideXlab platform.

  • on genetic erosion and population extinction in plants a case study in Scabiosa columbaria and salvia pratensis
    Conservation Genetics, 1994
    Co-Authors: R Bijlsma, N J Ouborg, R Van Treuren
    Abstract:

    Due to human activities, populations of many species have become small and isolated. In this situation they become subject to genetic drift and inbreeding, resulting in loss of genetic variation, an increase in homozygosity, and possibly a decrease in viability (inbreeding depression). This process, here referred to as genetic erosion, may significantly increase the extinction probability of populations or even species, and is therefore currently an important issue in conservation biology. The research presented here aimed to determine the occurrence, extent, and significance of genetic erosion in natural populations of Scabiosa columbaria and Salvia pratensis, two species that are considered endangered in The Netherlands.

Patrik Waldmann - One of the best experts on this subject based on the ideXlab platform.

  • quantitative conservation genetics of the rare plants Scabiosa canescens dipsacaceae and silene diclinis caryophyllaceae
    2000
    Co-Authors: Patrik Waldmann
    Abstract:

    This thesis concerns quantitative genetic aspects of the conservation biology of two rare plants, Scabiosa canescens and Silene diclinis. Particular attention was given to the effects of genetic drift on the structuring of variation in allozymes and quantitative characters, the association between (current) population size and quantitative genetic variation, the level of inbreeding depression in fitness characters and morphology in a small, isolated population, and the effect of inbreeding and intraspecific hybridization on developmental instability. Some of the Scabiosa studies included the more common and widespread Scabiosa columbaria as a reference species. The quantitative genetic structure within Scabiosa canescens and Silene diclinis — low between-population variance combined with high within-population variation — suggests that the current number of individuals is a poor predictor of the adaptive potential of a population and that it takes many generations before random genetic drift reduces the quantitative genetic variation of small, isolated populations. A majority of the allozyme and quantitative characters in Scabiosa canescens and Silene diclinis showed similar levels of population subdivision, suggesting some overlap between the structure of variation in monogenic and polygenic characters. However, there is no reason to believe that this pattern is general. For example, the Silene data indicated a tendency for some characters (leaf size) to be more strongly differentiated than the allozymes, and S. columbaria, a close relative of S. canescens, showed higher population differentiation for phenotypic traits than for allozymes. Hence, as long as high resolution QTL-analyses cannot be performed, conservation strategies based on variation at marker loci may be misleading. The observation that flower fluctuating asymmetry (FA) is sensitive to inbreeding suggests that measures of developmental instability could serve as an early warning system for monitoring the effects of genetic stress in rare, threatened species. However, given the low statistical power in studies of developmental instability, I urge caution in the use of FA as a measure of genetic stress at the individual level, unless several measurements on repeated organs from each individual are available. (Less)

  • comparison of quantitative genetic variation and allozyme diversity within and between populations of Scabiosa canescens and s columbaria
    Heredity, 1998
    Co-Authors: Patrik Waldmann, Stefan Andersson
    Abstract:

    Comparison of quantitative genetic variation and allozyme diversity within and between populations of Scabiosa canescens and S. columbaria

David C. Reed - One of the best experts on this subject based on the ideXlab platform.

Related terms

Scabiosa - 15 days free trial to Access Experts & Abstracts