A kind of sexual union; -- applied to a blending of the contents of two or more cells or individuals in some plants and lower animals, by which new spores or germs are developed.
In unicellular organisms, temporary cell contact between complementary genders and exchange of genetic material, as in the ciliate Paramecium aurelia, or one-way transfer of genes as in bacteria (see F Factor) and green alga Spirogyra.
Modern bacteria reproduce by splitting in two - that is, they have asexual reproduction. But a bacteria can join temporarily with another bacteria to swap genetic fragments. This conjugation process is why so many bacteria have recently become antibiotic resistant. The process permits bacteria to form a sort of community.
1. the act of conjugating, or state of conjugation. 2. temporary cytoplasmic union with exchange of nuclear material that is the usual sexual process of protozoans. 3. the one-way transfer of DNA between bacteria in cellular contact
sexual fusion of two ameboid cells (motile is from ameboid movement not flagella). two types
Transfer of genes from one procaryotic cell to another by a machanism involving cell-to-cell contact (Lecture: Bacterial Molecular Genetics I, 2/5/02)
in medical nanorobotics, the docking of two or more nanorobots for the purpose of exchanging information, energy or materials, or to establish a larger multirobotic structure; in biology, the union of two unicellular organisms accompanied by an interchange of nuclear material, as in Paramecium.
A form of genetic exchange in which a living donor cell attaches to a recepient cell and DNA is transferred from the donor to the recipient In bacteria that conjugate, the donor stain has sex pili. These are short filamentous structures on the surface of the donor cell. The sex pili bind to the recipient cell and mediate the tranfer of DNA. Usually, the recipient does not possess sex pili. The donor cell contains an F plasmid, a short DNA molecule that encodes the formation of the sex pili. The F plasmid DNA is transferred to the recipient during conjugation. In some strains, the F plasmid has been incorporated into the donor cell chromosome. In this case, chromosomal genes may be transferred to the recipient. Very few bacterial groups can perform conjugation. Examples include certain strains of Escherichia coli and Salmonella.
The intercellular transfer of DNA that is mediated by pili, which are surface appendages that are encoded by certain bacterial plasmids and transposons.
Form of gene transfer and recombination in bacteria that requires direct cell-to-cell contact.
The phenomenon whereby two bacterial cells join temporarily and exchange genetic material. ~ See Also: Pilus, Plasmid.
In the zygnematalean algae, sexual reproduction involving nonflagellate gametes that combine in a special tube or structure; see also lateral and scalariform conjugation
a mating process where the temporary union of two one celled organisms results in the exchange of genetic material.
A form of sexual reproduction where two individuals fuse and exchange genetic material and then separate.
The mating process in bacteria which require cell to cell contact being established, and in which genes are transferred between cells.
The transfer of genetic material, in particular the transfer of microbial genes or gene clusters, either between or within species.
con-ju-GAY-shun A form of gene transfer in bacteria. 000 A form of sexual reproduction in protozoa. 194, 449, 459
A recombination mechanism that results in the transfer of genetic, material between two bacterial cells that are temporarily joined.
The union of two bacterial cells, during which chromosomal material is transferred from the donor to the recipient cell.
Transfer of DNA between two bacteria that come into physical contact with each another.
The chemical linking of the bacterial polysaccharide (sugar) cell coat with a protein carrier to improve the immune response to a bacterial vaccine.
a mechanism of fusion of gametes in which a non flagellated gamete move from one cell to another via a tube (conjugation tube) connecting the cells.
The establishment of a bridge between a donor and a recipient cell and the transfer of DNA from one cell to the other. Conjugation is mediated by certain plasmids and transposons. Conjugation requires direct contact between the donor and recipient cells.
a temporary union of two single-celled organisms with at least one of them receiving genetic material from the other; in bacteria the exchange is unidirectional with the donor cell extruding all or a portion of one of its chromosomes into the recipient cell
In general, any of various sexual processes in microorganisms in which gene transfer follows the establishment of direct contact between two (or more) cells which typically show little or no morphological differentiation from vegetative cells. In bacterial conjugation, one bacterium (the "male" or donor cell) transfers DNA to another (the "female" or recipient cell) while the cells are in physical contact; a recipient that has received DNA from a donor is called a transconjugant. ( 16)
A process by which genetic material is exchanged between two cells through a bridge of cytoplasm that connects the cells. This happens in bacteria and in many protists.