What question did this study set out to answer?

To determine the developmental morphogenesis, cellular origins, and evolutionary dynamics of specialized symbiotic organs (bacteriomes) harboring dual endosymbionts in Cicadidae.

November 1, 2025Environmental Microbiology

Initially Coexisting Endosymbionts Migrate Into Different Tissues During Ontogeny of Host Cicadas

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To determine the developmental morphogenesis, cellular origins, and evolutionary dynamics of specialized symbiotic organs (bacteriomes) harboring dual endosymbionts in Cicadidae.
Examined bacteriome morphogenesis and endosymbiont colonization dynamics across cicada embryonic stages (anatrepsis and katatrepsis) and post-embryonic ontogeny using microscopy-based techniques.
Bacteriomes originate either jointly from original bacteriocytes appearing post-anatrepsis and novel bacteriocytes arising during katatrepsis, or solely from katatrepsis-derived bacteriocytes, proliferating via budding.
The obligate bacterium Karelsulcia and yeast-like fungal symbionts (YLS) initially coexist in embryonic bacteriomes, but niche competition correlates with subsequent YLS translocation into fat bodies during maturation.

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Implication

Microscopy investigation reveals symbiont migration from bacteriomes to fat bodies in developing cicadas, suggesting immune regulation drives specialized organ evolution.

Cite This Study

Zhou et al. (2025) studied this question.

synapsesocial.com/papers/6aae23aaf4925908d1d2e85b https://doi.org/10.1111/1462-2920.70185

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Implication

Microscopy investigation reveals symbiont migration from bacteriomes to fat bodies in developing cicadas, suggesting immune regulation drives specialized organ evolution.

Initially Coexisting Endosymbionts Migrate Into Different Tissues During Ontogeny of Host Cicadas

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Discussion

Implication

Cite This Study

Initially Coexisting Endosymbionts Migrate Into Different Tissues During Ontogeny of Host Cicadas

Key Points

Discussion

Implication

Cite This Study

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