Sexual dimorphism and rapid turnover in gene expression in pre-reproductive seedlings of a dioecious herb.

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Serval ID
serval:BIB_15FC16AC72A0
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Sexual dimorphism and rapid turnover in gene expression in pre-reproductive seedlings of a dioecious herb.
Journal
Annals of botany
Author(s)
Cossard G.G., Toups M.A., Pannell J.R.
ISSN
1095-8290 (Electronic)
ISSN-L
0305-7364
Publication state
Published
Issued date
08/07/2019
Peer-reviewed
Oui
Volume
123
Number
7
Pages
1119-1131
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
Sexual dimorphism in morphology, physiology or life history traits is common in dioecious plants at reproductive maturity, but it is typically inconspicuous or absent in juveniles. Although plants of different sexes probably begin to diverge in gene expression both before their reproduction commences and before dimorphism becomes readily apparent, to our knowledge transcriptome-wide differential gene expression has yet to be demonstrated for any angiosperm species.
The present study documents differences in gene expression in both above- and below-ground tissues of early pre-reproductive individuals of the wind-pollinated dioecious annual herb, Mercurialis annua, which otherwise shows clear sexual dimorphism only at the adult stage.
Whereas males and females differed in their gene expression at the first leaf stage, sex-biased gene expression peaked just prior to, and after, flowering, as might be expected if sexual dimorphism is partly a response to differential costs of reproduction. Sex-biased genes were over-represented among putative sex-linked genes in M. annua but showed no evidence for more rapid evolution than unbiased genes.
Sex-biased gene expression in M. annua occurs as early as the first whorl of leaves is produced, is highly dynamic during plant development and varies substantially between vegetative tissues.
Keywords
Dioecy, plant development, sex chromosomes, sex determination, sex-biased gene expression
Pubmed
Create date
16/10/2018 11:04
Last modification date
26/02/2020 8:08
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