Earlier cytological investigations characterize the family Diprionidae with a modal chromosome number of seven. This study shows that Diprion pini and D. similis have 14 acrocentric chromosomes (n = 14 for haploid males and 2n = 28 for diploid females). In D. pini, rRNA genes are located on the satellite and the round short arm of the chromosome carrying this segment. We studied six populations with no evidence of chromosomal polymorphism at the species level. Our results disagree with those published previously and reopen the question of karyotype evolution. Chromosome morphology, ISH and C-banding results support the hypothesis of chromosome number doubling by centric fission and not by polyploidization, followed by the growth of short arms by means of pericentromeric DNA amplification.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1046/j.1365-2540.1998.00421.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Sawfly Sex Pheromones: Analysis of Their Impact on Pine Odor Attractive to Egg Parasitoids.
J Chem Ecol
November 2024
Applied Zoology/Animal Ecology, Institute of Biology, Freie Universität Berlin, Berlin, Germany.
Pinus sylvestris trees are known to efficiently defend themselves against eggs of the herbivorous sawfly Diprion pini. Their direct defense against eggs is primable by prior exposure to the sex pheromones of this species and their indirect defense involves attraction of egg parasitoids by egg-induced pine needle odor. But it is unknown whether exposure of pine to D.
View Article and Find Full Text PDFPine Response to Sawfly Pheromones: Effects on Sawfly's Oviposition and Larval Growth.
Insects
June 2024
Applied Zoology/Animal Ecology, Institute of Biology, Freie Universität Berlin, 12163 Berlin, Germany.
Insect pheromones have been intensively studied with respect to their role in insect communication. However, scarce knowledge is available on the impact of pheromones on plant responses, and how these in turn affect herbivorous insects. A previous study showed that exposure of pine () to the sex pheromones of the pine sawfly results in enhanced defenses against the eggs of this sawfly; the egg survival rate on pheromone-exposed pine needles was lower than that on unexposed pine.
View Article and Find Full Text PDFThe impact of insect egg deposition on Pinus sylvestris transcriptomic and phytohormonal responses to larval herbivory.
Tree Physiol
February 2024
Applied Genetics, Institute of Biology, Freie Universität Berlin, Albrecht-Thaer-Weg 6, Berlin 14195, Germany.
Plants can improve their resistance to feeding damage by insects if they have perceived insect egg deposition prior to larval feeding. Molecular analyses of these egg-mediated defence mechanisms have until now focused on angiosperm species. It is unknown how the transcriptome of a gymnosperm species responds to insect eggs and subsequent larval feeding.
View Article and Find Full Text PDFPlant defensive responses to insect eggs are inducible by general egg-associated elicitors.
Sci Rep
January 2024
Applied Zoology/Animal Ecology, Institute of Biology, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Haderslebener Str. 9, 12163, Berlin, Germany.
Egg deposition by herbivorous insects is well known to elicit defensive plant responses. Our study aimed to elucidate the insect and plant species specificity of these responses. To study the insect species specificity, we treated Arabidopsis thaliana with egg extracts and egg-associated secretions of a sawfly (Diprion pini), a beetle (Xanthogaleruca luteola) and a butterfly (Pieris brassicae).
View Article and Find Full Text PDFPine defense against eggs of an herbivorous sawfly is elicited by an annexin-like protein present in egg-associated secretion.
Plant Cell Environ
April 2022
Department of Applied Zoology and Animal Ecology, Freie Universität Berlin, Dahlem Centre of Plant Sciences, Institute of Biology, Berlin, Germany.
Known elicitors of plant defenses against eggs of herbivorous insects are low-molecular-weight organic compounds associated with the eggs. However, previous studies provided evidence that also proteinaceous compounds present in secretion associated with eggs of the herbivorous sawfly Diprion pini can elicit defensive responses in Pinus sylvestris. Pine responses induced by the proteinaceous secretion are known to result in enhanced emission of (E)-β-farnesene, which attracts egg parasitoids killing the eggs.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!