Size and shape: the developmental regulation of static allometry in insects

@article{Shingleton2007SizeAS,
  title={Size and shape: the developmental regulation of static allometry in insects},
  author={Alexander W. Shingleton and W. Anthony Frankino and T. Flatt and H. Frederik Nijhout and Douglas J. Emlen},
  journal={BioEssays},
  year={2007},
  volume={29}
}
Among all organisms, the size of each body part or organ scales with overall body size, a phenomenon called allometry. The study of shape and form has attracted enormous interest from biologists, but the genetic, developmental and physiological mechanisms that control allometry and the proportional growth of parts have remained elusive. Recent progress in our understanding of body‐size regulation provides a new synthetic framework for thinking about the mechanisms and the evolution of… 

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References

SHOWING 1-10 OF 93 REFERENCES

The developmental basis for allometry in insects.

TLDR
Three models to explain the second process of static allometry in insects are presented and it is suggested that hormones are the messengers of size information.

Competition among body parts in the development and evolution of insect morphology.

  • H. NijhoutD. Emlen
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 1998
TLDR
In the case of beetle horns, the tradeoff in size is manifest as a significant negative genetic correlation among the involved body parts and constitutes a developmental source of genetic constraint on the evolution of body form.

The control of body size in insects.

Genotype to Phenotype: Physiological Control of Trait Size and Scaling in Insects1

TLDR
This work summarizes four mechanisms known to influence either the rate or the duration of cell proliferation within developing structures, and suggests how mutations in these mechanisms could affect the relative sizes of adult body parts in insects.

A quantitative analysis of the mechanism that controls body size in Manduca sexta

TLDR
A quantitative description of the empirical data on body size determination that accurately predicts body size for diverse genetic strains is developed and shows that body size is fully determined by three fundamental parameters: the growth rate, thecritical weight, and the interval between the critical weight and the secretion of ecdysone.

The developmental and physiological basis of body size evolution in an insect

TLDR
It is shown that three of the five processes that determine adult body size changed during this period, while two remained constant, and changes in these three developmental processes completely account for the observed evolutionary change in body size.

Genetic control of size in Drosophila.

TLDR
Recent evidence from vertebrates and particularly from Drosophila that implicates insulin/insulin-like growth factor-I and other growth pathways in the control of cell, organ and body size is reviewed.

The development and evolution of exaggerated morphologies in insects.

TLDR
It is argued that scaling relationships are best viewed as reaction norms, and that the evolution of exaggerated morphological traits results from genetic changes in the slope and/or shape of these scaling relationships.

Mechanisms of size control.

Matters of Scale: Positive Allometry and the Evolution of Male Dimorphisms

TLDR
These findings question the currently held view that beetle horn dimorphisms showcase the importance of developmental independence in the evolution of diversity, and use predictions derived from allometric modeling to test for the existence of reprogramming thresholds.
...