Journalartikel

Jahr der Veröffentlichung: 2017

Seiten: 925-942

Zeitschrift: Molecular Biology and Evolution

Bandnummer: 34

Heftnummer: 4

ISSN: 0737-4038

eISSN: 1537-1719

Open Access Status: Bronze

DOI Link: https://doi.org/10.1093/molbev/msw297

Verlag: Oxford University Press

Abstract: 
Evolutionary innovations are important drivers of speciation and some
are the defining characters of entire phyla. One such major innovation
is the carpel, the unifying character and most complex plant organ,
composed of many clearly distinct tissue types to ensure reproductive
success. The origin of the carpel is unknown, but many components of the
gene regulatory network (GRN) governing carpel development and their
genetic interactions are known from the core eudicot Arabidopsis
thaliana. To unravel the evolution of the carpel GRN and to discriminate
between "early" and "late" steps in carpel evolution, we calculated
thorough phylogeny reconstructions based on sequenced genomes. The A.
thaliana carpel GRN members ALCATRAZ (ALC), CRABS CLAW (CRC), HALF
FILLED (HAF), HECATE (HEC), INDEHISCENT (IND), NGATHA (NGA), and SPATULA
(SPT) were analyzed in their phylogenetic context. We find that the
carpel GRN components are of various ages, but interestingly, we
identify especially high retention rates for carpel development genes in
Brassicaceae. Our data suggest that genes whose A. thaliana homologs
are involved in processes already present in the most recent common
ancestor of seed plants, such as reproductive meristem termination or
adaxial/abaxial polarity specification, are not retained in duplicates
after whole genome duplications (WGD). In contrast, genes involved in
processes associated with derived carpel characters in Arabidopsis, such
as the transmitting tract or style development show a higher gene
retention rate afterWGD. This work provides a starting point for
analyses of carpel genes in early diverging angiosperms which would be
very informative for evolutionary studies.

Harvard-Zitierstil: Pfannebecker, M., Lange, M., Rupp, O. and Becker, A. (2017) Seed Plant-Specific Gene Lineages Involved in Carpel Development, Molecular Biology and Evolution, 34(4), pp. 925-942. https://doi.org/10.1093/molbev/msw297

APA-Zitierstil: Pfannebecker, M., Lange, M., Rupp, O., & Becker, A. (2017). Seed Plant-Specific Gene Lineages Involved in Carpel Development. Molecular Biology and Evolution. 34(4), 925-942. https://doi.org/10.1093/molbev/msw297