Bakterite paljunemine Bakterid paljunevad lihtsa pooldumise teel (sissesopistumise teel või ristvaheseina sissekasvamise teel), mis algab sellest, et mikroob kasvab oma pärilikult määratud pikkuseni. Rakkude jagunemise alustamiseks on vajalik valk FtsZ. FtsZ (filamentous temperature sensitive) valk on eukarüootide tubuliiniga homoloogne valk, mis rakkude jagunemisel moodustab algul rõnga jagunemiskoha ümber ja see rõngas tõmbub hiljem kokku, aidates tütarrakkudel eralduda. Pooldumise eel toimub DNA replikatsioon, mille tulemusena moodustub bakteris kaks rõngaskromosoomi. Järgnevalt sünteesitakse raku keskossa rakumembraanid.. Protsess lõpeb raku keskele vaheseina tekkimisega,
Molecular Biology and Evolution 16: 114-126. Ito, Y. & Hirano, T. 1999. A group I intron in the 18S ribosomal DNA from the parasitic fungus Isaria japonica. Journal of Molecular Evolution 48: 337-340. Jamrt-Vierny, C., Boulay, J. & Briand, J-F. 1997. Contribution of various classes of defective mitochondrial DNA molecules to senescence in Podospora anserina. Current Genetics 31: 171-178. Jazwinski, S.M. 1996. Longevity assurance genes and mitochondrial DNA alterations: yeast and filamentous fungi. In: Handbook of the Biology of Aging (4th edition), p. 39. Academic Press, New York. Kamaletdinowa, F.I. & Vassilyev, A.E. 1982. Cytology of Discomycetes. Alma-Ata, 176 pp. Kempken, F. 1995. Horizontal transfer of a mitochondrial plasmid. Molecular & General Genetics 248: 89-94. Kempken, F. & Kuck, U. 1998. Transposons in filamentous fungi--facts and perspectives. Bioessays 20: 652-659. Kim, N.S., Park, N.I., Kim, S.H., Kim, S.T., Han, S.S. & Kang, K.Y. 2000
uses carbon dioxide, water and chemicals like ammonia to make food - these bacteria are called nitrogen fixers and include the bacteria found living in legume roots and in ocean vents). Fungi - is a member of a large group of eukaryotic organisms that includes microorganisms such as yeasts and molds (British English: moulds), as well as the more familiar mushrooms. Actinomycetes - any member of a heterogeneous group of gram-positive, generally anaerobic bacteria noted for a filamentous and branching growth pattern that results, in most forms, in an extensive colony, or mycelium. The mycelium in some species may break apart to form rod- or coccoid-shaped forms. Many genera also form spores; the sporangia, or spore cases, may be found on aerial hyphae, on the colony surface, or free within the environment. Motility, when present, is conferred by flagella. Many species of actinomycetes occur in soil
· Plasmiidid võivad jaguneda tütarrakkude vahel ebavõrdselt ja kui ei ole peal selektiivset pressi, siis võib plasmiid osadest rakkudest kergesti elimineeruda. Pooldumine võib toimuda sissesopistumise (näiteks E. coli) teel Pooldumine võib toimuda ka ristvaheseina sissekasvamise teel (näiteks B. subtilis). Rakkude jagunemise alustamiseks on vajalik valk FtsZ, mida on leitud nii bakteritel kui ka arhedel, aga näiteks ka taimede kloroplastides. FtsZ (filamentous temperature sensitive) valk on eukarüootide tubuliiniga homoloogne valk (ürgne tubuliin?), mis rakkude jagunemisel moodustab algul rõnga jagunemiskoha ümber ja see rõngas tõmbub hiljem kokku, aidates tütarrakkudel eralduda. FtsZ rõngas moodustub siis, kui kromosoomi replikatsioon on juba toimunud. Pooldumine toimub enamasti ühes tasapinnas, aga näiteks kokkidel võib järjestikune jagunemine toimuda erinevates tasapindades ja see viib agregaatide tekkele.
47 min D-value 65°C 0.28 min D-value 70°C 0.04 min D-value a D-value is the time required to reduce a given bacterial population by 90% ture to the contraction and likely hardening force after internal temperature reach 70° of filamentous materials present within the (Ritchey and Hostetler 1965; Bouton et al. meat. These results showed that two reac- 1976, 1982; Leander et al. 1980). However, tions with opposite effects were taking place, other researchers have reported a decrease in one producing tenderization and the other shear force values at temperatures between increasing hardness of the samples
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