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Updated: Jun 19, 2026

Real-time In Vivo Recording of Arabidopsis Calcium Signals During Insect Feeding Using a Fluorescent Biosensor

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Published on: August 15, 2017

Does corazonin signal nutritional stress in insects?

Jan A Veenstra¹

¹Université de Bordeaux, CNIC UMR 5228 CNRS, Talence, France. j.veenstra@cnic.u-bordeaux1.fr

Insect Biochemistry and Molecular Biology

|October 10, 2009

Summary

Corazonin, an arthropod peptide, acts like GnRH and is found widely in insects. Its exact function is unclear, but it may be released during nutritional stress, influencing various physiological changes.

Area of Science:

Neuroendocrinology
Comparative Physiology
Arthropod Biology

Background:

Corazonin is an undecapeptide neurohormone found in arthropods, structurally similar to GnRH.
It is produced in the brain and ventral nerve cord of insects, with varied physiological roles across species.
Its precise function remains largely unknown, with effects ranging from cardioacceleration to phase changes and cocoon size reduction.

Purpose of the Study:

To explore the diverse physiological functions of corazonin in insects.
To investigate the potential role of corazonin in insect development and behavior.
To propose a unifying hypothesis for corazonin's function based on observed effects and receptor expression.

Main Methods:

Literature review of existing studies on corazonin.

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Comparative analysis of corazonin's effects across different insect species.

Analysis of corazonin precursor structure and receptor relationships.

Inference of functional roles based on observed physiological changes and cellular localization.

Main Results:

Corazonin exhibits diverse functions, including cardioacceleration in some species, phase transition induction in locusts, and cocoon size modification in silkworms.
While capable of inducing ecdysis in some moths, its absence does not prevent normal ecdysis in locusts and flies, questioning its essentiality.
Corazonin neuroendocrine cells express receptors for midgut peptides, suggesting modulation by the gut endocrine system.

Conclusions:

Corazonin's functions are varied and context-dependent across arthropods.
Corazonin may play a role in mediating responses to environmental conditions, such as nutritional stress.
Further research is needed to fully elucidate the essentiality and regulatory mechanisms of corazonin in insect physiology.