Key homeobox transcription factors regulate the development of the firefly’s adult light organ and bioluminescence

Xinhua Fu () and Xinlei Zhu
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Xinhua Fu: Huazhong Agricultural University
Xinlei Zhu: Firefly Conservation Research Centre

Nature Communications, 2024, vol. 15, issue 1, 1-18

Abstract: Abstract Adult fireflies exhibit unique flashing courtship signals, emitted by specialized light organs, which develop mostly independently from larval light organs during the pupal stage. The mechanisms of adult light organ development have not been thoroughly studied until now. Here we show that key homeobox transcription factors AlABD-B and AlUNC-4 regulate the development of adult light organs and bioluminescence in the firefly Aquatica leii. Interference with the expression of AlAbd-B and AlUnc-4 genes results in undeveloped or non-luminescent adult light organs. AlABD-B regulates AlUnc-4, and they interact with each other. AlABD-B and AlUNC-4 activate the expression of the luciferase gene AlLuc1 and some peroxins. Four peroxins are involved in the import of AlLUC1 into peroxisomes. Our study provides key insights into the development of adult light organs and flash signal control in fireflies.

Date: 2024
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DOI: 10.1038/s41467-024-45559-7

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