Definitions for imaginal disc
imag·i·nal disc

WiktionaryRate this definition:0.0 / 0 votes

1. imaginal discnoun

   Any of several pairs of discs within the body of a larva that become part of the outside during pupal transformation

WikipediaRate this definition:0.0 / 0 votes

1. Imaginal disc

   An imaginal disc is one of the parts of a holometabolous insect larva that will become a portion of the outside of the adult insect during the pupal transformation. Contained within the body of the larva, there are pairs of discs that will form, for instance, the wings or legs or antennae or other structures in the adult. The role of the imaginal disc in insect development was first elucidated by Jan Swammerdam.During the pupal stage, many larval structures are broken down, and adult structures, including the discs, undergo rapid development. Each disc everts and elongates, with the central portion of the disc becoming the distal part of whichever appendage it is forming: the wing, leg, antenna, etc. During the larval stage, the cells in the growing disc appear undifferentiated, but their developmental fate in the adult is already determined.The experiment that demonstrates this developmental commitment is to take an imaginal disc from a third instar larva, about to undergo pupation, and subdivide it and culture it in the body of a younger larva. Discs can be continuously cultured this way for many larval generations. When such a cultured disc is eventually implanted in the body of a larva that is allowed to pupate, the disc will develop into the structure it was originally determined to become. That is, an antenna disc can be cultured this way and will, almost always, become an antenna (out of place, of course) when final development is triggered by pupation. The study of imaginal discs in the fruit fly Drosophila melanogaster led to the discovery of homeotic mutations such as antennapedia, where the developmental fate of a disc could sometimes change. It is of interest to entomologists that the kinds of developmental switches that occur are very specific (leg to antenna, for instance). Study of this phenomenon led to the discovery of the homeobox genes, and started a revolution in the understanding of development in multi-celled animals.

WikidataRate this definition:0.0 / 0 votes

1. Imaginal disc

   An imaginal disc is one of the parts of a holometabolous insect larva that will become a portion of the outside of the adult insect during the pupal transformation. Contained within the body of the larva, there are pairs of discs that will form, for instance, the wings or legs or antennae or other structures in the adult. The role of the imaginal disc in insect development was first elucidated by Jan Swammerdam. During the pupal stage, many larval structures are broken down, and adult structures, including the discs, undergo rapid development. Each disc everts and elongates, with the central portion of the disc becoming the distal part of whichever appendage, wing, leg, antenna, etc., it is forming. During the larval stage, the cells in the growing disc appear undifferentiated, but their developmental fate in the adult is already determined. The experiment that demonstrates this developmental commitment is to take an imaginal disc from a third instar larva, about to undergo pupation, and subdivide it and culture it in the body of a younger larva. Discs can be continuously cultured this way for many larval generations. When such a cultured disc is eventually implanted in the body of a larva that is allowed to pupate, the disc will develop into the structure it was originally determined to become. That is, an antenna disc can be cultured this way and will, almost always, become an antenna when final development is triggered by pupation.

How to pronounce imaginal disc?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

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   Tessa

   South African

How to say imaginal disc in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of imaginal disc in Chaldean Numerology is: 3

2. Pythagorean Numerology

   The numerical value of imaginal disc in Pythagorean Numerology is: 2

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Imaginal_Disc
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Imaginal_Disc
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=imaginal disc