2024-03-29T13:24:23Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:02001271
2023-01-19T05:19:15Z
1309:1310
Comparisons in temperature and photoperiodic-dependent diapause induction between domestic and wild mulberry silkworms
Yokoyama, Takeshi
Saito, Shigeru
Shimoda, Misato
Kobayashi, Masakazu
Takasu, Yoko
Sezutsu, Hideki
Kato, Yoshiomi
Tominaga, Makoto
Mizoguchi, Akira
Shiomi, Kunihiro
The bivoltine strain of the domestic silkworm, Bombyx mori, has two generations per year. It shows a facultative diapause phenotype determined by environmental conditions, including photoperiod and temperature, and nutrient conditions during embryonic and larval development of the mother. However, it remains unclear how the environmental signals received during development are selectively utilized as cues to determine alternative diapause phenotypes. We performed a comparative analysis between the Kosetsu strain of B. mori and a Japanese population of the wild mulberry silkworm B. mandarina concerning the hierarchical molecular mechanisms in diapause induction. Our results showed that for the Kosetsu, temperature signals during the mother's embryonic development predominantly affected diapause determination through the thermosensitive transient receptor potential ankyrin 1 (TRPA1) and diapause hormone (DH) signaling pathways. However, embryonic diapause in B. mandarina was photoperiod-dependent, although the DH signaling pathway and thermal sensitivity of TRPA1 were conserved within both species. Based on these findings, we hypothesize that TRPA1-activated signals are strongly linked to the signaling pathway participating in diapause induction in Kosetsu to selectively utilize the temperature information as the cue because temperature-dependent induction was replaced by photoperiodic induction in the TRPA1 knockout mutant.
Article
Scientific Report 11(1) : 8052-(2021)
journal article
Springer Nature
2021-04-13
application/pdf
Scientific Report
1
11
8052
2045-2322
https://soar-ir.repo.nii.ac.jp/record/2001271/files/17H03941_1.pdf
eng
10.1038/s41598-021-87590-4
https://doi.org/10.1038/s41598-021-87590-4
© The Author(s) 2021