Referenced in: none

Automatically associated channels: TRP , TRPA , TRPA1

Title: Embryonic thermosensitive TRPA1 determines transgenerational diapause phenotype of the silkworm, Bombyx mori.

Authors: Azusa Sato, Takaaki Sokabe, Makiko Kashio, Yuji Yasukochi, Makoto Tominaga, Kunihiro Shiomi

Journal, date & volume: Proc. Natl. Acad. Sci. U.S.A., 2014 Apr 1 , 111, E1249-55

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/24639527

Abstract
In the bivoltine strain of the silkworm, Bombyx mori, embryonic diapause is induced transgenerationally as a maternal effect. Progeny diapause is determined by the environmental temperature during embryonic development of the mother; however, its molecular mechanisms are largely unknown. Here, we show that the Bombyx TRPA1 ortholog (BmTrpA1) acts as a thermosensitive transient receptor potential (TRP) channel that is activated at temperatures above ∼ 21 °C and affects the induction of diapause in progeny. In addition, we show that embryonic RNAi of BmTrpA1 affects diapause hormone release during pupal-adult development. This study identifying a thermosensitive TRP channel that acts as a molecular switch for a relatively long-term predictive adaptive response by inducing an alternative phenotype to seasonal polyphenism is unique.