Social regulation of insulin signaling and the evolution of eusociality in ants.
Social regulation of insulin signaling and the evolution of eusociality in ants.
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DOI:
10.1126/science.aar5723
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发表时间:
2018-07-27
期刊:
影响因子:
--
通讯作者:
Kronauer DJC
中科院分区:
文献类型:
--
作者:
Chandra V;Fetter-Pruneda I;Oxley PR;Ritger AL;McKenzie SK;Libbrecht R;Kronauer DJC
Queens and workers of eusocial Hymenoptera are considered homologous to the reproductive and brood care phases of an ancestral subsocial lifecycle. However, the molecular mechanisms underlying the evolution of reproductive division of labor remain obscure. Using a brain transcriptomics screen, we identified a single gene, insulin-like peptide 2 (ilp2), which is always upregulated in ant reproductives, likely due to their higher nutritional state. In clonal raider ants, larval signals inhibit adult reproduction by suppressing ilp2, producing a colony reproductive cycle reminiscent of ancestral subsociality. Increasing ILP2 peptide levels overrides larval suppression, thereby breaking the colony cycle and inducing a stable division of labor. This suggests a simple model for the origin of ant eusociality via nutritionally determined reproductive asymmetries potentially amplified by larval signals.
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