How parental stress will impact on the variation in development of the next generation? ‘Bet-hedging’ hypothesis, in that between-sibling variation increases after parental exposure to environmental stress, has been widely discussed in evolutionary biology. However, contrary to the prediction of bet-hedging hypothesis, we found that variation in the maternal mRNAs decreases after maternal embryonic thermal stress in Ciona intestinalis. In a small number of mRNAs encoding signaling molecules, we found increase in maternal mRNA in the egg from stressed mothers. The results is published in BMC Ecology and Evolution 24: 21 (2024)

https://bmcecolevol.biomedcentral.com/articles/10.1186/s12862-024-02203-8