Insect segmentation: Genes, stripes and segments in ‘Hoppers’

French, Vernon

doi:10.1016/s0960-9822(01)00552-8

Cited by 14 publications

(11 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Differences in the patterning of different body domains have also been shown in grasshoppers, where several genes are expressed differently during segmentation of the gnathum and thorax, as compared to the abdomen (Davis et al, 2001;Dearden and Akam, 2001;French, 2001). The gnathum and thorax of the grasshopper are first demarcated by the expression of the hunchback gene .…”

Section: Early Expression Of Tu-run May Be Involved In Limb Specificamentioning

confidence: 98%

Expression of pair-rule gene homologues in a chelicerate: early patterning of the two-spotted spider miteTetranychus urticae

2002

View full text Add to dashboard Cite

Embryo segmentation has been studied extensively in the fruit fly,Drosophila. These studies have demonstrated that a mechanism acting with dual segment periodicity is required for correct patterning of the body plan in this insect, but the evolutionary origin of the mechanism, the pair-rule system, is unclear. We have examined the expression of the homologues of two Drosophila pair-rule genes, runt andpaired (Pax Group III), in segmenting embryos of the two-spotted spider mite (Tetranychus urticae Koch). Spider mites are chelicerates, a group of arthropods that diverged from the lineage leading toDrosophila at least 520 million years ago. In T. urticae,the Pax Group III gene Tu-pax3/7 was expressed during patterning of the prosoma, but not the opisthosoma, in a series of stripes which appear first in even numbered segments, and then in odd numbered segments. The miterunt homologue (Tu-run) in contrast was expressed early in a circular domains that resolved into a segmental pattern. The expression patterns of both of these genes also indicated they are regulated very differently from their Drosophila homologues. The expression pattern of Tu-pax3/7 lends support to the possibility that a pair-rule patterning mechanism is active in the segmentation pathways of chelicerates.

show abstract

Section: Early Expression Of Tu-run May Be Involved In Limb Specificamentioning

confidence: 98%

Expression of pair-rule gene homologues in a chelicerate: early patterning of the two-spotted spider miteTetranychus urticae

2002

View full text Add to dashboard Cite

show abstract

“…It is widely held that insects evolved flight just once, at least 100 million years before pterosaurs, perhaps 170 million years ago [5]. Other noteworthy features include the development of the posterior tentorium into a tranverse bar, and metamorphism and segmentation of metameres [7,8]. …”

Section: Introductionmentioning

confidence: 99%

Identification and characterization of insect-specific proteins by genome data analysis

et al. 2007

View full text Add to dashboard Cite

Background: Insects constitute the vast majority of known species with their importance including biodiversity, agricultural, and human health concerns. It is likely that the successful adaptation of the Insecta clade depends on specific components in its proteome that give rise to specialized features. However, proteome determination is an intensive undertaking. Here we present results from a computational method that uses genome analysis to characterize insect and eukaryote proteomes as an approximation complementary to experimental approaches.

show abstract

“…Comparative studies in other insects have revealed significant conservation in the function of many segmentation genes (see reviews in French 2001;Davis and Patel 2002;Hughes and Kaufman 2002), but less clear is the functional conservation of the gap genes between insect species. Two studies-one in Tribolium castaneum, examining a giant (gt) homolog (Tc'giant) (Bucher and Klingler 2004), and one in Oncopeltus fasciatus, examining a hunchback (hb) homolog (Of'hb) (Liu and Kaufman 2004)-conclude that the function of these gap genes is one of segmentation and segment identity, differing somewhat from the segmentation function characterized in Drosophila.…”

mentioning

confidence: 99%

The Drosophila Gap Gene giant Has an Anterior Segment Identity Function Mediated Through disconnected and teashirt

Sanders¹,

Patel²,

Mahaffey

2008

Genetics

View full text Add to dashboard Cite

The C2H2 zinc-finger-containing transcription factors encoded by the disconnected (disco) and teashirt (tsh) genes contribute to the regionalization of the Drosophila embryo by establishing fields in which specific Homeotic complex (Hom-C) proteins can function. In Drosophila embryos, disco and the paralogous disco-related (disco-r) are expressed throughout most of the epidermis of the head segments, but only in small patches in the trunk segments. Conversely, tsh is expressed extensively in the trunk segments, with little or no accumulation in the head segments. Little is known about the regulation of these genes; for example, what limits their expression to these domains? Here, we report the regulatory effects of gap genes on the spatial expression of disco, disco-r, and tsh during Drosophila embryogenesis. The data shed new light on how mutations in giant (gt) affect patterning within the anterior gt domain, demonstrating homeotic function in this domain. However, the homeosis does not occur through altered expression of the Hom-C genes but through changes in the regulation of disco and tsh.

show abstract

Insect segmentation: Genes, stripes and segments in ‘Hoppers’

Cited by 14 publications

References 19 publications

Expression of pair-rule gene homologues in a chelicerate: early patterning of the two-spotted spider miteTetranychus urticae

Expression of pair-rule gene homologues in a chelicerate: early patterning of the two-spotted spider miteTetranychus urticae

Identification and characterization of insect-specific proteins by genome data analysis

The Drosophila Gap Gene giant Has an Anterior Segment Identity Function Mediated Through disconnected and teashirt

Contact Info

Product

Resources

About