Storage proteins in ants (Hymenoptera:Formicidae)

Area of Science:

• Insect physiology
• Biochemistry
• Evolutionary biology

Background:

• Storage proteins are integral to holometabolous insect development, accumulating in larvae and diminishing during metamorphosis.
• In ants (Hymenoptera: Formicidae), these proteins have significant roles in adult females, with three main types identified: hexamerins, glutamine/glutamic acid-rich proteins, and very high-density lipoproteins (VHDLs).

Purpose of the Study:

• To investigate the presence and function of storage proteins in adult ants, specifically in *Camponotus festinatus*.
• To determine the conditions under which adult ants accumulate storage proteins and to assess the prevalence of this phenomenon across different ant subfamilies.

Main Methods:

• Characterization of storage protein types in ants, including hexamerins, glutamine/glutamic acid-rich proteins, and VHDLs.
• Observation of protein accumulation in *Camponotus festinatus* workers and virgin queens under different conditions (e.g., brood availability).
• Confirmation of protein storage in adult females across multiple ant subfamilies.

Main Results:

• Adult ants, particularly workers and young queens, accumulate storage proteins, specifically two types of hexamers also found in larvae.
• Protein storage in adult females is stimulated by factors like lack of brood in workers and pre-mating periods in queens.
• The capacity for protein storage in adult females is widespread across different ant subfamilies.

Conclusions:

• Adult ants possess the ability to store proteins, a trait that supports reproductive success and colony function.
• Queen protein storage enables brood rearing within the nest, while worker storage facilitates resource management and seasonal dietary regulation.