scholarly journals Growth zone segmentation in the milkweed bug Oncopeltus fasciatus sheds light on the evolution of insect segmentation

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Tzach Auman ◽  
Ariel D. Chipman
Keyword(s):  
Growth Zone ◽  
Oncopeltus Fasciatus ◽  
Milkweed Bug

scholarly journals Growth zone segmentation in the milkweed bug Oncopeltus fasciatus sheds light on the evolution of insect segmentation

2018 ◽  
Author(s):  
Tzach Auman ◽  
Ariel D. Chipman
Keyword(s):  
Gene Expression ◽  
Growth Zone ◽  
Oncopeltus Fasciatus ◽  
Milkweed Bug ◽  
Segment Polarity Genes ◽  
Temporal Relationships ◽  
Segment Polarity ◽  
Spatio Temporal ◽  
Segment Pattern ◽  
Pair Rule

AbstractOne of the best studied developmental processes is the Drosophila segmentation cascade. However, this cascade is generally considered to be highly derived and unusual. We present a detailed analysis of the sequential segmentation cascade of the milkweed bug Oncopletus fasciatus, as a comparison to Drosophila, with the aim of reconstructing the evolution of insect segmentation. We analyzed the expression of 12 genes, representing different phases during segmentation. We reconstruct the spatio-temporal relationships among these genes And their roles and position in the cascade. We conclude that sequential segmentation in the Oncopeltus germband includes three phases: Primary pair-rule genes generate segmental gene expression in the anterior growth zone, followed by secondary pair-rule genes, expressed in the transition between the growth zone and the segmented germband. Segment polarity genes are expressed in the segmented germband. This process generates a single-segment periodicity, and does not have a double-segment pattern at any stage.

Studies on the pteridines in the milkweed bug, Oncopeltus fasciatus (Dallas)

1966 ◽  
Vol 12 (11) ◽  
pp. 1411-1421 ◽  
Author(s):  
Hugh S. Forrest ◽  
Michael Menaker ◽  
Jennifer Alexander
Keyword(s):  
Oncopeltus Fasciatus ◽  
Milkweed Bug

scholarly journals Transovum Transmission of Trypanosomatid Cysts in the Milkweed Bug, Oncopeltus fasciatus

PLoS ONE ◽  
2014 ◽  
Vol 9 (9) ◽  
pp. e108746 ◽  
Author(s):  
Felipe de Almeida Dias ◽  
Luiz Ricardo da Costa Vasconcellos ◽  
Alexandre Romeiro ◽  
Marcia Attias ◽  
Thais Cristina Souto-Padrón ◽  
...  
Keyword(s):  
Oncopeltus Fasciatus ◽  
Milkweed Bug

The Hormonal Control of the Development of Hairs and Bristles in the Milkweed Bug, ONCOPELTUS FASCIATUS, DALL

1966 ◽  
Vol 44 (3) ◽  
pp. 507-522
Author(s):  
PETER A. LAWRENCE
Keyword(s):  
Juvenile Hormone ◽  
Mode Of Action ◽  
Hormonal Control ◽  
Oncopeltus Fasciatus ◽  
Corpora Allata ◽  
Moult Cycle ◽  
Dense Population ◽  
Milkweed Bug ◽  
Larval Stages ◽  
Hormonal Milieu

1. As in Rhodnius, the larval Oncopeltus has bristles which are supplemented at each moult. However, at metamorphosis a dense population of non-innervated hairs develops. 2. Implantation of corpora allata into 5th-stage larvae showed that the development of these hairs can be inhibited universally or locally by the juvenile hormone (JH). 3. Transplantations of integument between 5th-stage larvae of different stages in the moult cycle gave some information about the power of the host to synchronize the graft to its own moult cycle. 4. Transplantations between different larval stages showed that the grafted in tegument responded to the hormonal milieu of the host. 5. Adult integument was transplanted onto larvae to study the reversal of metamorphosis. It was found that the development of a supernumerary population of hairs depended on the integument passing through a moult cycle in the presence of JH. After two moults in the presence of JH, reversal of metamorphosis was found to vary over the surface of the transplant, being further advanced at the margin. At the edge of the graft properly formed larval bristles developed, while at the centre adult hairs were formed in adult cuticle. Intermediately formed bristles were found in the intervening areas. It is suggested that reactions associated with wounding are the cause of this heterogeneous result. 6. The significance of these results in relation to other work and to theories concerning the mode of action of the juvenile hormone is discussed.

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