Complex evolution of novel red floral color in Petunia.
Complex evolution of novel red floral color in Petunia.
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DOI:
10.1093/plcell/koab114
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发表时间:
2021-08-13
期刊:
影响因子:
--
通讯作者:
Kuhlemeier C
中科院分区:
文献类型:
--
作者:
Berardi AE;Esfeld K;Jäggi L;Mandel T;Cannarozzi GM;Kuhlemeier C
Red flower color has arisen multiple times and is generally associated with hummingbird pollination. The majority of evolutionary transitions to red color proceeded from purple lineages and tend to be genetically simple, almost always involving a few loss-of-function mutations of major phenotypic effect. Here we report on the complex evolution of a novel red floral color in the hummingbird-pollinated Petunia exserta (Solanaceae) from a colorless ancestor. The presence of a red color is remarkable because the genus cannot synthesize red anthocyanins and P. exserta retains a nonfunctional copy of the key MYB transcription factor AN2. We show that moderate upregulation and a shift in tissue specificity of an AN2 paralog, DEEP PURPLE, restores anthocyanin biosynthesis in P. exserta. An essential shift in anthocyanin hydroxylation occurred through rebalancing the expression of three hydroxylating genes. Furthermore, the downregulation of an acyltransferase promotes reddish hues in typically purple pigments by preventing acyl group decoration of anthocyanins. This study presents a rare case of a genetically complex evolutionary transition toward the gain of a novel red color. Hummingbird-pollinated Petunia exserta acquires its unique red flower color by changes in multiple regulatory and biosynthetic genes.
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影响因子:
12.3
作者:
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通讯作者:
Lappalainen T
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通讯作者:
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作者:
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