conjugation microbiology powerpoint presentation

Download Conjugation Microbiology powerpoint presentation

Post on 10-May-2015

3.334 views

Category:

Education

4 download

Embed Size (px)

DESCRIPTION

conjugation microbiology powerpoint presentation ppt

TRANSCRIPT

  • 1.MICROBIOLOGY CONJUGATION Meghna V III Semester MGMCH

2. BACTERIAL CONJUGATION WAS FIRST DISCOVERED BY Lederberg And Tatum IN 1946 IN Esch.coliK12 STRAINS 3. CONJUGATION BACTERIA ABACTERIA BTRANSFER OF GENETIC MATERIAL FROM BACTERIA A TO BACTERIA B BY MATING OR CONTACT IS CALLED CONJUGATION. 4. WHO IS A DONOR?F PLASMID DONOR F+ MALE CELLABSENT RECIPIENT F FEMALE 5. F PLASMID FERTILITY FACTOR SEX FACTOR TRANSFER FACTOR 6. THIS F PLASMID ENCODES FOR THE SEX PILUS 7. WHAT HAPPENS DURING CONJUGATION? 8. THE ONCE FEMALE RECIPIENT CELL NOW BECOMES THE MALE DONOR CELLTHIS CHARACTERISTIC OF MALENESS (F+) IN BACTERIA IS TRANSMISSIBLE OR INFECTIOUS 9. What is Hfr cell? When F factor/ plasmid exists in an integrated state with the host chromosome 10. Hfr CONJUGATION 11. F+ (free plasmid)Hfr ( integrated )REVERSIBLETURNS A (F-) INTO A (F+) UPON CONJUGATIONCONJUGATION WITH A Hfr , AN (F-) RARELY BECOMES (F+) BUT IT RECEIVES CHROMOSOMAL DNA FROM THE DONOR 12. REVERSIBLE(F+)Hfr 13. SEXDUCTION 14. F+Hfr REVERSIBLEWHEN THE F FACTOR REVERTS FROM INTEGRATED FREE STATE IT MAY SOMETIMES CARRY WITH IT SOME CHROMOSOMAL DNA FROM ADJACENT SITE OF ITS ATTACHMENTSUCH AN F FACTOR IS KNOWN AS F FACTOR 15. ( F) + ( F-)SEXDUCTIONWHEN (F) CONJUGATES WITH A RECIPIENT (F), IT TRANSFERS, ALONG WITH THE F FACTOR, THE HOST DNA INCORPORATED WITH IT. 16. MEDICALLY IMPORTANT FACTORS WHICH CAN BE TRANSFERRED BY CONJUGATION 1. COLICOGENIC FACTOR (COL) 2. RESISTANCE TRANSFER FACTOR (RTF) 17. THANKYOU