نتایج جستجو برای: continuous imaginal world

تعداد نتایج: 685305  

Journal: :Mechanisms of Development 1997
Alfred C. Aplin Thomas C. Kaufman

The Drosophila homeotic gene proboscipedia (pb) specifies labial identify and directs formation of the adult distiproboscis from the labial imaginal discs. pb null alleles result in the homeotic transformation of the distiproboscis into prothoracic (T1) legs [Kaufman (1978) Genetics 90, 579-596; Pultz et al. (1988) Genes Dev. 2, 901-920]. Homology with other transcription factors, localization ...

Journal: :Genetics 1978
A Shearn G Hersperger E Hersperger E S Pentz P Denker

The phenotypes of five different lethal mutants of Drosophila melanogaster that have small imaginal discs were analyzed in detail. From these results, we inferred whether or not the observed imaginal disc phenotype resulted exclusively from a primary imaginal disc defect in each mutant. To examine the validity of these inferences, we employed a multiple-allele method. Lethal alleles of the five...

Journal: :Religions 2022

This paper examines the diasporist French Jewish political group, Le Cercle Gaston Crémieux, founded in 1967 “to promote a diasporic existence without subjugation to synagogue or Zionism”. In contrast either an assimilationist model which demanded acceptance of national identity public sphere, Zionist nationalism, offered state exile and diaspora becomes constitutive identity, positioned as alt...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2002
H Frederik Nijhout Laura W Grunert

The mechanisms that control the growth rate of internal tissues during postembryonic development are poorly understood. In insects, the growth rate of imaginal disks varies with nutrition and keeps pace with variation in somatic growth. We describe here a mechanism by which the growth of wing imaginal disks is controlled. When wing imaginal disks of the butterfly Precis coenia are removed from ...

Journal: :Journal of embryology and experimental morphology 1980
C Guillermet P Mandaron

Imaginal leg and wing discs obtained from late-third-instar Drosophila larvae were cultured in vitro in various concentrations of ecdysterone ranging from 10(-10) to 10(-5) M in order to test the effect of hormone concentration on evagination and cell differentiation. At the optimal concentration of 8 x 10(-8) M discs evaginated normally, secreted the pupal cuticle, underwent apolysis, differen...

Journal: :Journal of visualized experiments : JoVE 2014
Carrie M Spratford Justin P Kumar

A significant portion of post-embryonic development in the fruit fly, Drosophila melanogaster, takes place within a set of sac-like structures called imaginal discs. These discs give rise to a high percentage of adult structures that are found within the adult fly. Here we describe a protocol that has been optimized to recover these discs and prepare them for analysis with antibodies, transcrip...

Journal: :Genetics 1998
A Percival-Smith D J Hayden

Sex Combs Reduced (SCR) activity is proposed to be required cell nonautonomously for determination of tarsus identity, and Extradenticle (EXD) activity is required cell autonomously for determination of arista identity. Using the ability of Proboscipedia to inhibit the SCR activity required for determination of tarsus identity, we found that loss-of-EXD activity is epistatic to loss-of-SCR acti...

Journal: :Mechanisms of Development 2013
Tomonori Katsuyama Renato Paro

Following tissue damage the immune response, including inflammation, has been considered an inevitable condition to build the host defense against invading pathogens. The recruitment of innate immune leukocytes to injured tissue is observed in both vertebrates and invertebrates. However, it is still not conclusive whether the inflammatory response is also indispensable for the wound healing pro...

Journal: :Current Biology 2010
Adrian Halme Michelle Cheng Iswar K. Hariharan

Damage to Drosophila imaginal discs elicits a robust regenerative response from the surviving tissue [1-4]. However, as in other organisms, developmental progression and differentiation can restrict the regenerative capacity of Drosophila tissues. Experiments in Drosophila and other holometabolous insects have demonstrated that either damage to imaginal tissues [5, 6] or transplantation of a da...

Journal: :Development 1991
L A Raftery M Sanicola R K Blackman W M Gelbart

Imaginal disks, the primordia of the adult appendages in Drosophila, are divided into anterior and posterior compartments. However, the developmental role of such compartments remains unclear. The expression of decapentaplegic (dpp), a pattern formation gene required for imaginal disk development, has the intriguing property of being expressed in a line at or near the boundary between these com...

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