Gene expression in diapausing rotifer eggs in response to divergent environmental predictability regimes.

Abstract:

:In unpredictable environments in which reliable cues for predicting environmental variation are lacking, a diversifying bet-hedging strategy for diapause exit is expected to evolve, whereby only a portion of diapausing forms will resume development at the first occurrence of suitable conditions. This study focused on diapause termination in the rotifer Brachionus plicatilis s.s., addressing the transcriptional profile of diapausing eggs from environments differing in the level of predictability and the relationship of such profiles with hatching patterns. RNA-Seq analyses revealed significant differences in gene expression between diapausing eggs produced in the laboratory under combinations of two contrasting selective regimes of environmental fluctuation (predictable vs unpredictable) and two different diapause conditions (passing or not passing through forced diapause). The results showed that the selective regime was more important than the diapause condition in driving differences in the transcriptome profile. Most of the differentially expressed genes were upregulated in the predictable regime and mostly associated with molecular functions involved in embryo morphological development and hatching readiness. This was in concordance with observations of earlier, higher, and more synchronous hatching in diapausing eggs produced under the predictable regime.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Tarazona E,Lucas-Lledó JI,Carmona MJ,García-Roger EM

doi

10.1038/s41598-020-77727-2

subject

Has Abstract

pub_date

2020-12-07 00:00:00

pages

21366

issue

1

issn

2045-2322

pii

10.1038/s41598-020-77727-2

journal_volume

10

pub_type

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