Sexual dimorphism and rapid turnover in gene expression in pre-reproductive seedlings of a dioecious herb.
Authors: Cossard, G.G., Toups, M.A. and Pannell, J.R.
Journal: Ann Bot
Volume: 123
Issue: 7
Pages: 1119-1131
eISSN: 1095-8290
DOI: 10.1093/aob/mcy183
Abstract:BACKGROUND AND AIMS: 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. METHODS: 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. KEY RESULTS: 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. CONCLUSIONS: 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.
Source: PubMed
Sexual dimorphism and rapid turnover in gene expression in pre-reproductive seedlings of a dioecious herb
Authors: Cossard, G.G., Toups, M.A. and Pannell, J.R.
Journal: ANNALS OF BOTANY
Volume: 123
Issue: 7
Pages: 1119-1131
eISSN: 1095-8290
ISSN: 0305-7364
DOI: 10.1093/aob/mcy183
Source: Web of Science (Lite)
Sexual dimorphism and rapid turnover in gene expression in pre-reproductive seedlings of a dioecious herb
Authors: Cossard, G.C., Toups, M.A. and Pannell, J.R.
Journal: Annals of Botany
Volume: 123
Pages: 1119-1131
Publisher: Oxford University Press
ISSN: 0305-7364
Source: Manual
Sexual dimorphism and rapid turnover in gene expression in pre-reproductive seedlings of a dioecious herb.
Authors: Cossard, G.G., Toups, M.A. and Pannell, J.R.
Journal: Annals of botany
Volume: 123
Issue: 7
Pages: 1119-1131
eISSN: 1095-8290
ISSN: 0305-7364
DOI: 10.1093/aob/mcy183
Abstract:Background and aims
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.Methods
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.Key results
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.Conclusions
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.Source: Europe PubMed Central