A5058362434- Plant and animal studies
- Lepidoptera: Biology and Taxonomy
- Genetic diversity and population structure
- Insect-Plant Interactions and Control
- Insect and Arachnid Ecology and Behavior
- Insect Resistance and Genetics
- Genomics and Phylogenetic Studies
- Animal Behavior and Reproduction
- Insect and Pesticide Research
- Plant Parasitism and Resistance
- Ecology and Vegetation Dynamics Studies
- Neurobiology and Insect Physiology Research
- Plant Molecular Biology Research
- Plant Reproductive Biology
- Chromosomal and Genetic Variations
- Entomological Studies and Ecology
- Physiological and biochemical adaptations
- Genetic and phenotypic traits in livestock
- Fungal and yeast genetics research
- Insect symbiosis and bacterial influences
- Antimicrobial Peptides and Activities
- Plant Genetic and Mutation Studies
- Polysaccharides and Plant Cell Walls
- Insect Utilization and Effects
- Research in Cotton Cultivation
Stockholm University
2015-2024
Max Planck Institute for Chemical Ecology
2011-2012
Max Planck Society
2012
University of California, Davis
2005-2008
University of California System
2008
Abstract Background Hormesis is a biphasic biological response characterized by the stimulatory effect at relatively low amounts of chemical compounds which are otherwise detrimental higher concentrations. A hormetic in larval growth rates has been observed cotton-feeding insects to increasing concentrations gossypol, toxic metabolite found pigment glands some plants family Malvaceae. We investigated developmental gossypol cotton bollworm, Helicoverpa armigera , an important heliothine pest...
Abstract Transcriptome studies of insect herbivory are still rare, yet in model systems have uncovered patterns transcript regulation that appear to provide insights into how herbivores attain polyphagy, such as a general increase expression breadth and ribosomal, digestion‐ detoxification‐related genes. We investigated the potential generality these emerging patterns, Swedish comma, P olygonia c‐album , which is polyphagous, widely‐distributed butterfly. U rtica dioica Ribes uva‐crispa...
Unprecedented reorganization in a butterfly genome sheds light on the enigma of holocentric chromosome evolution.
Abstract Tradeoffs affect resource allocation during development and result in fitness consequences that drive the evolution of life history strategies. Yet despite their importance, we know little about mechanisms underlying tradeoffs. Many species Colias butterflies exhibit an alternative strategy (ALHS) where females divert resources from wing pigment synthesis to reproductive somatic development. Due this reallocation, a color polymorphism is associated with ALHS: either yellow/orange or...
Abstract The generalist cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), can consume host plants in more than 40 families, and often utilizes several tissues of a single plant. It is believed that generalists owe their success to the deployment various members multigene families detoxification digestive enzymes, strategy may also be responsible for rapid evolution insecticide resistance. However, studies adaptations have been limited specific genes or gene an overview...
Although the importance of insect saliva in insect-host plant interactions has been acknowledged, there is very limited information on nature and complexity salivary proteome lepidopteran herbivores. We inspected labial transcriptome Helicoverpa armigera, an important polyphagous pest species. To identify majority proteins we have randomly sequenced 19,389 expressed sequence tags (ESTs) from a normalized cDNA library glands. In parallel, non-cytosolic enriched protein fraction was obtained...
Background: Although most insect species are specialized on one or few groups of plants, there phytophagous insects that seem to use virtually any kind plant as food.Understanding the nature this ability feed a wide repertoire plants is crucial for control pest and elucidation macroevolutionary mechanisms speciation diversification herbivores.Here we studied Vanessa cardui, with widest diet breadth among butterflies potential pest, by comparing tissue-specific transcriptomes from...
Developing genomic insights is challenging in nonmodel species for which resources are often scarce and prohibitively costly. Here, we explore the potential of a recently established approach using Pool-seq data to generate de novo genome assembly mining exons, upon used estimate population divergence diversity. We do this two pairs sympatric populations brown trout (Salmo trutta): one naturally set another pair introduced common environment. validate our by comparing results those from...
Abstract Alfalfa and cotton flowers were pierced with small glass capillaries of an overall size shape similar to that Lygus stylets, injected quantities (6 100 nL) solutions contained salivary enzymes. Crude partially purified protein from heads isolated glands showed substantial polygalacturonase (PG) activity, as has been previously reported. Following injection both crude solutions, well pure fungal bacterial PGs, alfalfa exhibited damage caused by feeding. Injection the same volume a...
Polygalacturonase (PG) activity found in the salivary gland apparatus of western tarnished plant bug (WTPB, Lygus hesperus Knight) has been thought to be main chemical cause damage inflicted by this mirid when feeding on its hosts. Early viscosity and thermal stability studies PG L. protein extracts were difficult interpret. Thus, it suggested that one or more protein(s) with different hydrolytic modes action are produced mirid. In order understand quantitative complexity WTPB activity,...
Abstract Background The Glanville fritillary (Melitaea cinxia) butterfly is a model system for metapopulation dynamics research in fragmented landscapes. Here, we provide chromosome-level assembly of the butterfly's genome produced from Pacific Biosciences sequencing pool males, combined with linkage map population crosses. Results final size 484 Mb an increase 94 on previously published genome. Estimation completeness BUSCO indicates that contains 92–94% genes complete and single copies. We...
Abstract International policy recently adopted commitments to maintain genetic diversity in wild populations secure their adaptive potential, including metrics monitor temporal trends – so‐called indicators. A national programme for assessing was initiated Sweden. Relating this effort, we systematically assess contemporary genome‐wide (40 years) using the newly indicators and whole genome sequencing (WGS). We use pooled individual WGS data from brown trout ( Salmo trutta ) eight alpine lakes...
Abstract Populations in nature rarely adapt to a single stress at time. Various biotic and abiotic factors come together produce complex environment which populations must adapt. How multiple stressors simultaneously, how trade-offs evolve between these has been of interest evolutionary biologists for decades. But natural often present logistical challenges understanding the dynamics evolution isolating genetic basis adaptation. Here we use methods experimental test adaptation proceeds...
Generalist butterflies are characterized by a broad host repertoire that can comprise several families or even different orders of plants. The genetic and physiological mechanisms underlying the use such wide range still not fully understood. Earlier studies indicate consumption plants is associated with host-specific gene expression profiles. It remained, however, unclear if how larvae alter these profiles in case changing environment. Using polyphagous comma butterfly (Polygonia c-album)...
1. In the study of evolution insect–host plant interactions, important information is provided by host ranking correspondences among female preference, offspring and performance. Here, we contrast such patterns in two polyphagous sister species butterfly family N ymphalidae, earctic Polygonia faunus, P alearctic P. c‐album . 2. These have similar ranges, but according to literature faunus does not use ancestral clade – ‘urticalean rosids’. Comparisons can thus test effects a change...
The comma butterfly (Polygonia c-album, Nymphalidae, Lepidoptera) is a model insect species, most notably in the study of phenotypic plasticity and plant-insect coevolutionary interactions. In order to facilitate integration genomic tools with diverse body ecological evolutionary research, we assembled genome Swedish using 10X sequencing, scaffolding matepair data, polishing, assignment linkage groups high-density map. resulting 373 Mb size, scaffold N50 11.7 contig 11,2Mb. contained 90.1%...
Abstract In this study, we investigated whether patterns of gene expression in larvae feeding on different plants can explain important aspects the evolution insect–plant associations, such as phylogenetic conservatism host use and re-colonization ancestral hosts that have been lost from repertoire. To end, performed a phylogenetically informed study comparing transcriptomes 4 nymphalid butterfly species Polygonia closely related genus Nymphalis. Larvae were reared Urtica dioica, Salix spp.,...
In plant-feeding insects, the evolutionary retention of polyphagy remains puzzling. A better understanding relationship between these organisms and changes in metabolome their host plants is likely to suggest functional links them, may provide insights into how maintained.We investigated phenological change Cynoglossum officinale, a generalist butterfly species, Vanessa cardui, responded this change. We used untargeted metabolite profiling map plant seasonal both primary secondary...