Search results for "Bion"
showing 10 items of 130 documents
Competitive interactions in insect parasitoids: effects of microbial symbionts across tritrophic levels
2023
Competition for hosts is a common ecological interaction in insect parasitoids. In the recent years, it has become increasingly evident that microorganisms can act as ‘hidden players’ in parasitoid ecology. In this review, we propose that parasitoid competition should take into consideration the microbial influence. In particular, we take a tritrophic perspective and discuss how parasitoid competition can be modulated by microorganisms associated with the parasitoids, their herbivore hosts, or the plants attacked by the herbivores. Although research is still in its infancy, recent studies have shown that microbial symbionts can modulate the contest outcome. The emerging pattern is that micr…
Influence of Bacterial Secondary Symbionts in Sitobion avenae on Its Survival Fitness against Entomopathogenic Fungi, Beauveria bassiana and Metarhiz…
2022
The research was focused on the ability of wheat aphids Sitobion avenae, harboring bacterial secondary symbionts (BSS) Hamiltonella defensa or Regiella insecticola, to withstand exposure to fungal isolates of Beauveria bassiana and Metarhizium brunneum. In comparison to aphids lacking bacterial secondary symbionts, BSS considerably increased the lifespan of wheat aphids exposed to B. bassiana strains (Bb1022, EABb04/01-Tip) and M. brunneum strains (ART 2825 and BIPESCO 5) and also reduced the aphids’ mortality. The wheat aphid clones lacking bacterial secondary symbionts were shown to be particularly vulnerable to M. brunneum strain BIPESCO 5. As opposed to wheat aphids carrying bacterial s…
Data from: Phylogenomics of Lophotrochozoa with consideration of systematic error
2021
Phylogenomic studies have improved understanding of deep metazoan phylogeny and show promise for resolving incongruences among analyses based on limited numbers of loci. One region of the animal tree that has been especially difficult to resolve, even with phylogenomic approaches, is relationships within Lophotrochozoa (the animal clade that includes molluscs, annelids, and flatworms among others). Lack of resolution in phylogenomic analyses could be due to insufficient phylogenetic signal, limitations in taxon and/or gene sampling, or systematic error. Here, we investigated why lophotrochozoan phylogeny has been such a difficult question to answer by identifying and reducing sources of sys…
Data from: Phylogenomics of Lophotrochozoa with consideration of systematic error
2016
Phylogenomic studies have improved understanding of deep metazoan phylogeny and show promise for resolving incongruences among analyses based on limited numbers of loci. One region of the animal tree that has been especially difficult to resolve, even with phylogenomic approaches, is relationships within Lophotrochozoa (the animal clade that includes molluscs, annelids, and flatworms among others). Lack of resolution in phylogenomic analyses could be due to insufficient phylogenetic signal, limitations in taxon and/or gene sampling, or systematic error. Here, we investigated why lophotrochozoan phylogeny has been such a difficult question to answer by identifying and reducing sources of sys…
What Symbionts Teach us about Modularity
2013
The main goal of Synthetic Biology is to apply engineering principles to biotechnology in order to make life easier to engineer. These engineering principles include modularity: decoupling of complex systems into smaller, orthogonal subsystems that can be used in a range of different applications. The successful use of modules in engineering is expected to be reproduced in synthetic biological systems. But the difficulties experienced up to date with synthetic biology approaches question the short-term feasibility of designing life. Considering the “engineerable” nature of life, here we discuss the existence of modularity in natural living systems, particularly in symbiotic interactions, an…
A metaphysical approach to holobiont individuality: Holobionts as emergent individuals
2019
Holobionts are symbiotic assemblages composed by a host plus its microbiome. The status of holobionts as individuals has recently been a subject of continuous controversy, which has given rise to two main positions: on the one hand, holobiont advocates argue that holobionts are biological individuals; on the other, holobiont detractors argue that they are just mere chimeras or ecological communities, but not individuals. Both parties in the dispute develop their argu-ments from the framework of the philosophy of biology, in terms of what it takes for a ?conglomerate? to be considered an interesting individual from a biological point of view. However, the debates about holobiont individualit…
Biocompatible nanostructured hydrogels incorporating polyaniline nanoparticles
2009
Macromolecular engineering of hydrogels: from macro to nano scalar materials for different levels of biointeraction
2009
Redescription of Tipula octomaculata Savchenko, with notes on related Holarctic species (Diptera, Tipulidae)
2007
Tipula (Pterelachisus) octomaculata Savchenko, 1964 (Diptera, Tipulidae) has hitherto been known only from the type locality in north-western Russia, and no material besides the holotype male has been available for study. In this article we report T. octomaculata for the first time from Finland, redescribe the species and compare its morphological characters with those of related Nearctic species (T. trivittata Say, T. angulata Loew, T. entomophthorae Alexander). The Finnish finding locality in Ks: Taivalkoski, North boreal ecoregion, is briefly discussed.
Jaunas virsmaktīvas vielas sintēze: dodecillaktobionāts
2019
Jaunas virsmaktīvas vielas sintēze: dodecillaktobionāts. Ivanovs A., zinātniskais vadītājs Dr. ķīm., doc. Kļimenkovs I. Bakalaura darbs ķīmijā 38 lappuses, 6 attēli, 6 tabulas, 26 literatūras avoti, 4 pielikumi. Latviešu valodā. Darbā ir veikta informācijas apkopošana par virsmaktīvajām vielām un karboksilātu alkilēšanu. Eksperimentālajā daļā sintezēts dodecillaktobionāts, meklēti piemērotāki reakcijas apstākļi un vielas attīrīšanas metodes.