Related allopolyploids display distinct floral pigment profiles and transgressive pigments

McCarthy, Elizabeth W.; Berardi, Andrea E.; Smith, Stacey D.; Litt, Amy (2017). Related allopolyploids display distinct floral pigment profiles and transgressive pigments. American journal of botany, 104(1), pp. 92-101. Botanical Society of America 10.3732/ajb.1600350

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PREMISE OF THE STUDY: Both polyploidy and shifts in floral color have marked angiosperm evolution. Here, we investigate the biochemical basis of the novel and diverse floral phenotypes seen in allopolyploids in Nicotiana (Solanaceae) and examine the extent to which the merging of distinct genomes alters flavonoid pigment production. METHODS: We analyzed flavonol and anthocyanin pigments from Nicotiana allopolyploids of different ages (N. tabacum, 0.2 million years old; several species from Nicotiana section Repandae, 4.5 million years old; and five lines of first-generation synthetic N. tabacum) as well as their diploid progenitors. KEY RESULTS: Allopolyploid floral pigment profiles tend not to overlap with their progenitors or related allopolyploids, and allopolyploids produce transgressive pigments that are not present in either progenitor. Differences in floral color among N. tabacum accessions seems mainly to be due to variation in cyanidin concentration, but changes in flavonol concentrations among accessions are also present. CONCLUSIONS: Competition for substrates within the flavonoid biosynthetic pathway to make either flavonols or anthocyanins may drive the differences seen among related allopolyploids. Some of the pigment differences observed in allopolyploids may be associated with making flowers more visible to nocturnal pollinators. © 2017 Botanical Society of America.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Development
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Berardi, Andrea Elise

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0002-9122

Publisher:

Botanical Society of America

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

06 Jul 2017 08:32

Last Modified:

06 Jul 2017 08:32

Publisher DOI:

10.3732/ajb.1600350

PubMed ID:

28057690

Uncontrolled Keywords:

Allopolyploidy, Anthocyanin, Evolution, Flavonol, Flower color, Nicotiana, Transgressive characters

URI:

https://boris.unibe.ch/id/eprint/96137

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