Video Experimental Relacionado
Updated: May 10, 2026
07:28
Methods for the Extraction of Endosymbionts from the Whitefly Bemisia tabaci
Published on: June 19, 2017
La transferencia horizontal de genes de diversas bacterias a un genoma de insecto permite una simbiosis de mealybug
Filip Husnik1, Naruo Nikoh, Ryuichi Koga
1Faculty of Science, University of South Bohemia and Institute of Parasitology, Biology Centre ASCR, České Budějovice 370 05, Czech Republic.
Cell
|June 25, 2013
Resumen
El genoma bacteriano más pequeño, Tremblaya princeps, probablemente se redujo debido a su propio endosimbionte, Moranella endobia. La transferencia de genes al huésped de la mealybug no ayudó a esta reducción extrema del genoma.
Área de la Ciencia:
- Microbiología Microbiología.
- La genómica es la genómica.
- La simbiosis es una simbiosis.
Sus antecedentes:
- Tremblaya princeps, un simbionte de Planococcus citri mealybugs, posee el genoma bacteriano más pequeño conocido (139 kb).
- T. princeps alberga su propio endosimbionte bacteriano, Moranella endobia.
- Comprender la reducción extrema del genoma en T. princeps es crucial para comprender las relaciones simbióticas.
Objetivo del estudio:
- Investigar los factores que contribuyen a la reducción genómica extrema de Tremblaya princeps.
- Para determinar el papel de su endosimbionte, Moranella endobia, en este proceso.
- Explorar la contribución de la transferencia horizontal de genes al genoma del huésped de la mealybug para complementar las funciones del simbionte.
Principales métodos:
- Secuenciación del genoma y el transcriptoma de T. princeps y su huésped.
- Genómica comparativa, incluida la secuenciación de linajes de Tremblaya que carecen de bacterias intracelulares.
- Análisis de los genes transferidos horizontalmente en el genoma de la mealybug.
Principales resultados:
- La degeneración genómica extrema de T. princeps está relacionada con la adquisición de Moranella endobia como endosimbionte.
- Al menos 22 genes de transferencia horizontal expresados en el genoma de la mealybug parecen compensar los genes de simbiontes que faltan.
- Ninguno de los genes transferidos horizontalmente se originó en T. princeps, lo que indica que la transferencia de genes al núcleo del huésped no facilitó la reducción de su genoma.
Conclusiones:
- El funcionamiento de esta simbiosis de tres vías se basa en genes de al menos seis linajes de organismos distintos.
- La reducción del genoma en T. princeps no fue ayudada por la transferencia de genes al núcleo del huésped.
- Este estudio revela una vía única para la endosimbiosis íntima, que difiere de la evolución de los orgánulos.
Más Videos Relacionados
09:55Transposon-insertion Sequencing as a Tool to Elucidate Bacterial Colonization Factors in a Burkholderia gladioli Symbiont of Lagria villosa Beetles
Published on: August 12, 2021
13:00The Insect Galleria mellonella as a Powerful Infection Model to Investigate Bacterial Pathogenesis
Published on: December 11, 2012
Videos de Conceptos Relacionados
01:26Microbial Interactions: Cooperation
Microbial cooperation involves beneficial interactions in which different species work together for individual or mutual advantage. These interactions can profoundly influence ecological dynamics and evolutionary processes, and they are essential to many pathogenic and symbiotic relationships.Nematode–Bacteria CooperationA striking example is the relationship between the Gram-negative bacterium Xenorhabdus nematophila and the parasitic nematode Steinernema carpocapsae. Juvenile nematodes...
02:18Types of Genetic Transfer Between Organisms
Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
02:18Types of Genetic Transfer Between Organisms
Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
01:27Horizontal Gene Transfer
Horizontal gene transfer (HGT) is a process where genetic material moves between organisms within the same generation, unlike vertical gene transfer, which occurs from parent to offspring. HGT plays a crucial role in microbial evolution, adaptation, and survival, particularly in shared environments like the human gut.Mobile genetic elements such as plasmids, prophages, integrons, insertion sequences, and transposons facilitate this process. HGT occurs through three primary mechanisms:...
01:08Evolution of Microbial Genome
Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
01:22Microbial Interactions: Parasitism
Parasitism is a form of microbial interaction in which parasitic microbes exploit a host organism for nutrients and shelter, often at the host's expense. Unlike mutualistic relationships, where both organisms benefit, parasitism benefits only the parasite and harms the host.Classification of ParasitesMicrobial parasites are broadly classified based on their location relative to the host.Ectoparasites remain on the host’s surface, such as the skin or outer tissues, drawing nutrients...