Structure of the Insect Head in Ontogeny and Phylogeny: A View from Drosophila

Rogers, Bryan T.; Kaufman, Thomas C.

doi:10.1016/s0074-7696(08)62115-4

Cited by 96 publications

(79 citation statements)

References 215 publications

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“…Mouthpart elements from the maxillary and labial regions are developmentally available for co-optation and modification into compound tubular structures, such as the siphon (Handschin, 1929;Eastham & Eassa, 1955;Nagatomi & Soroida, 1985), often with anatomical contribution from adjacent mouthpart regions (Krenn et al, 2005). Siphonate proboscis formation undoubtedly is a recurring process and occurs, perhaps in a genetically and developmentally homologous way, in the conversion of mandibulate mouthparts into piercing-and-sucking haustellate mouthparts in nonholometabolous Hemiptera (Rogers & Kaufman, 1997).…”

Section: Mid Mesozoic Long-proboscid Insects and Their Seed Plant Hostsmentioning

confidence: 99%

The Pollination of Mid Mesozoic Seed Plants and the Early History of Long-proboscid Insects^1,^2,³

Labandeira¹

2010

Annals of the Missouri Botanical Garden

115

126

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Section: Mid Mesozoic Long-proboscid Insects and Their Seed Plant Hostsmentioning

confidence: 99%

The Pollination of Mid Mesozoic Seed Plants and the Early History of Long-proboscid Insects^1,^2,³

Labandeira¹

2010

Annals of the Missouri Botanical Garden

115

126

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“…The previously published Oncopeltus proboscipedia (Of'pb) sequence (Rogers and Kaufman, 1997) was used to design primers for 3′ RACE which allowed us to isolate a large cDNA (approximately 3 kb) corresponding to the 3′ end of the transcript. The Oncopeltus Ultrabithorax (Of'Ubx) and initial abdominal-A (Of'abd-A) had not been isolated so we cloned fragments of these genes using degenerate primers designed to the conserved homeodomain, and isolated larger fragments using exact primers.…”

Section: Cloningmentioning

confidence: 99%

Krüppelis a gap gene in the intermediate germband insectOncopeltus fasciatusand is required for development of both blastoderm and germband-derived segments

Liu

Kaufman

2004

Development

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Segmentation in long germband insects such as Drosophila occurs essentially simultaneously across the entire body. A cascade of segmentation genes patterns the embryo along its anterior-posterior axis via subdivision of the blastoderm. This is in contrast to short and intermediate germband modes of segmentation where the anterior segments are formed during the blastoderm stage and the remaining posterior segments arise at later stages from a posterior growth zone. The biphasic character of segment generation in short and intermediate germ insects implies that different formative mechanisms may be operating in blastoderm-derived and germband-derived segments. In Drosophila, the gap gene Krüppel is required for proper formation of the central portion of the embryo. This domain of Krüppel activity in Drosophila corresponds to a region that in short and intermediate germband insects spans both blastoderm and germband-derived segments. We have cloned the Krüppel homolog from the milkweed bug, Oncopeltus fasciatus (Hemiptera, Lygaeidae),an intermediate germband insect. We find that Oncopeltus Krüppelis expressed in a gap-like domain in the thorax during the blastoderm and germband stages of embryogenesis. In order to investigate the function of Krüppel in Oncopeltus segmentation, we generated knockdown phenotypes using RNAi. Loss of Krüppel activity in Oncopeltus results in a large gap phenotype, with loss of the mesothoracic through fourth abdominal segments. Additionally, we find that Krüppel is required to suppress both anterior and posterior Hox gene expression in the central portion of the germband. Our results show that Krüppel is required for both blastoderm-derived and germband-derived segments and indicate that Krüppel function is largely conserved in Oncopeltus and Drosophila despite their divergent embryogenesis.

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“…1)-has been viewed as distinct from that just described. (10) A different suite of gap genes under maternal control, including orthodenticle, empty spiracles and buttonhead, was thought to cooperate in directly driving a pattern of segment-polarity gene expression similar, but not identical, to that seen in the trunk. (10,11) There was no evidence of genes Figure 1.…”

Section: Introductionmentioning

confidence: 99%

The evolution of arthropod segmentation mechanisms

Peel¹

2004

BioEssays

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The fruit fly, Drosophila melanogaster, patterns its segments rapidly and simultaneously, via a mechanism that relies on the ability of transcription factors to diffuse between blastoderm nuclei. Ancestral arthropods patterned posterior segments sequentially in a cellular environment, where free diffusion was likely to have been inhibited by the presence of cell membranes. Understanding how the Drosophila paradigm evolved is a problem that has interested evolutionary developmental biologists for some time. In this article, I review what is known about arthropod segmentation mechanisms, and present a model for the evolution of the Drosophila paradigm. The model predicts that the primary pair-rule genes of Drosophila ancestrally functioned within and/or downstream of a Notch-dependent segmentation clock, their striped expression gradually coming under the control of gap genes as the number of segments patterned simultaneously in the anterior increased and the number patterned sequentially via a segmentation clock mechanism in the posterior correspondingly decreased.

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Structure of the Insect Head in Ontogeny and Phylogeny: A View from Drosophila

Cited by 96 publications

References 215 publications

The Pollination of Mid Mesozoic Seed Plants and the Early History of Long-proboscid Insects^1,^2,³

The Pollination of Mid Mesozoic Seed Plants and the Early History of Long-proboscid Insects^1,^2,³

Krüppelis a gap gene in the intermediate germband insectOncopeltus fasciatusand is required for development of both blastoderm and germband-derived segments

The evolution of arthropod segmentation mechanisms

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Structure of the Insect Head in Ontogeny and Phylogeny: A View from Drosophila

Cited by 96 publications

References 215 publications

The Pollination of Mid Mesozoic Seed Plants and the Early History of Long-proboscid Insects1,2,3

The Pollination of Mid Mesozoic Seed Plants and the Early History of Long-proboscid Insects1,2,3

Krüppelis a gap gene in the intermediate germband insectOncopeltus fasciatusand is required for development of both blastoderm and germband-derived segments

The evolution of arthropod segmentation mechanisms

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The Pollination of Mid Mesozoic Seed Plants and the Early History of Long-proboscid Insects^1,^2,³

The Pollination of Mid Mesozoic Seed Plants and the Early History of Long-proboscid Insects^1,^2,³