replica plating

rep·li·ca plat·ing

a procedure for producing an accurate copy of bacterial colonies from one agar plate to another.

replica plating

a method of transferring COLONIES (3) from a master plate of solidified MEDIUM to test plates, whilst still maintaining the same spatial arrangement of the colonies. Comparison can then easily be made between characteristics of the colonies on the ‘replica’ plates and those of the colonies on the original master plate. In the procedure a pad of, for example, sterile velvet is pressed gently on to the surface of the master plate, so that cells from each colony on the solid medium are picked up on the velvet pile. The velvet pad is then pressed down on to the surface of test plates containing solid medium, so that they are inoculated (see INOCULATION with the cells from the master plate. The method is often used to determine the GROWTH characteristics of MICROORGANISMS, for example in the identification of nutritional MUTANTS (see AUXOTROPH). Here the master plate contains complete medium, where the ‘replica’ plates contain MINIMAL MEDIUM with or without one or more specific growth factors. In this way mutants requiring a specific growth factor can be identified by comparing their growth on the various test plates with that on the master plate.

单词	replica plating
释义	replica plating replica plating [′rep·lə·kə ‚plād·iŋ] (microbiology) A method for the isolation of nutritional mutants in microorganisms; colonies are grown from a microorganism suspension previously exposed to a mutagenic agent, on a complete medium in a petri dish; a velour surface is used to transfer the impression of all these colonies to a petri dish containing a minimal medium; colonies that do not grow on the minimal medium are the mutants. replica plating rep·li·ca plat·ing a procedure for producing an accurate copy of bacterial colonies from one agar plate to another. replica plating a method of transferring COLONIES (3) from a master plate of solidified MEDIUM to test plates, whilst still maintaining the same spatial arrangement of the colonies. Comparison can then easily be made between characteristics of the colonies on the ‘replica’ plates and those of the colonies on the original master plate. In the procedure a pad of, for example, sterile velvet is pressed gently on to the surface of the master plate, so that cells from each colony on the solid medium are picked up on the velvet pile. The velvet pad is then pressed down on to the surface of test plates containing solid medium, so that they are inoculated (see INOCULATION with the cells from the master plate. The method is often used to determine the GROWTH characteristics of MICROORGANISMS, for example in the identification of nutritional MUTANTS (see AUXOTROPH). Here the master plate contains complete medium, where the ‘replica’ plates contain MINIMAL MEDIUM with or without one or more specific growth factors. In this way mutants requiring a specific growth factor can be identified by comparing their growth on the various test plates with that on the master plate.
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