Pigment composition patterns and expression of anthocyanin biosynthesis genes in Rhododendron kiusianum, R. kaempferi, and their natural hybrids on Kirishima mountain mass, Japan

Daiki Mizuta, Akira Nakatsuka, Takuya Ban, Ikuo Miyajima, Nobuo Kobayashi

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3 Citations (Scopus)

Abstract

We compared anthocyanidin composition patterns and the expression of anthocyanin biosynthesis genes in Rhododendron kiusianum, R. kaempferi, and their natural hybrids from the Kirishima mountain mass. Compared with the habitat, phenotypic characteristics including tree height and flower color did not change in the transplanted individuals after cutting propagation. According to flower color measurements, R. kiusianum and R. kaempferi belonged to purple and red series, respectively, and their natural hybrids belonged to either the red or purple series. HPLC analysis showed that the petals of most R. kiusianum and natural hybrids contained both cyanidin and delphinidin series pigments, while the petals of R. kaempferi contained only cyanidin series pigments. However, one R. kiusianum individual in the purple series contained only cyanidin series pigments and one natural hybrid individual in the red series contained both cyanidin and delphinidin series pigments. These individuals were thought to be influenced by co-pigmentation or a lack thereof, respectively. All samples expressed F3′H, DFR, and ANS genes in real-time quantitative RT-PCR, and the F3′5′H gene was always expressed in samples containing delphinidin series pigments. These results suggest that the expression of F3′5′H is essential for R. kiusianun and its natural hybrids to produce delphinidin series pigments. This study showed that interspecific hybridization between wild species with purple series flowers and wild species with red series flowers varied the pigment composition and anthocyanin biosynthesis-related gene expression in the natural hybrids, suggesting that it caused the flower color variation in the wild populations in the Kirishima mountains.

Original languageEnglish
Pages (from-to)156-162
Number of pages7
JournalJournal of the Japanese Society for Horticultural Science
Volume83
Issue number2
DOIs
Publication statusPublished - 2014

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Rhododendron
anthocyanins
pigments
mountains
biosynthesis
delphinidin
Japan
cyanidin
flowers
genes
corolla
color
anthocyanidins
interspecific hybridization
pigmentation
reverse transcriptase polymerase chain reaction
sampling
gene expression
habitats

All Science Journal Classification (ASJC) codes

  • Horticulture

Cite this

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title = "Pigment composition patterns and expression of anthocyanin biosynthesis genes in Rhododendron kiusianum, R. kaempferi, and their natural hybrids on Kirishima mountain mass, Japan",
abstract = "We compared anthocyanidin composition patterns and the expression of anthocyanin biosynthesis genes in Rhododendron kiusianum, R. kaempferi, and their natural hybrids from the Kirishima mountain mass. Compared with the habitat, phenotypic characteristics including tree height and flower color did not change in the transplanted individuals after cutting propagation. According to flower color measurements, R. kiusianum and R. kaempferi belonged to purple and red series, respectively, and their natural hybrids belonged to either the red or purple series. HPLC analysis showed that the petals of most R. kiusianum and natural hybrids contained both cyanidin and delphinidin series pigments, while the petals of R. kaempferi contained only cyanidin series pigments. However, one R. kiusianum individual in the purple series contained only cyanidin series pigments and one natural hybrid individual in the red series contained both cyanidin and delphinidin series pigments. These individuals were thought to be influenced by co-pigmentation or a lack thereof, respectively. All samples expressed F3′H, DFR, and ANS genes in real-time quantitative RT-PCR, and the F3′5′H gene was always expressed in samples containing delphinidin series pigments. These results suggest that the expression of F3′5′H is essential for R. kiusianun and its natural hybrids to produce delphinidin series pigments. This study showed that interspecific hybridization between wild species with purple series flowers and wild species with red series flowers varied the pigment composition and anthocyanin biosynthesis-related gene expression in the natural hybrids, suggesting that it caused the flower color variation in the wild populations in the Kirishima mountains.",
author = "Daiki Mizuta and Akira Nakatsuka and Takuya Ban and Ikuo Miyajima and Nobuo Kobayashi",
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T1 - Pigment composition patterns and expression of anthocyanin biosynthesis genes in Rhododendron kiusianum, R. kaempferi, and their natural hybrids on Kirishima mountain mass, Japan

AU - Mizuta, Daiki

AU - Nakatsuka, Akira

AU - Ban, Takuya

AU - Miyajima, Ikuo

AU - Kobayashi, Nobuo

PY - 2014

Y1 - 2014

N2 - We compared anthocyanidin composition patterns and the expression of anthocyanin biosynthesis genes in Rhododendron kiusianum, R. kaempferi, and their natural hybrids from the Kirishima mountain mass. Compared with the habitat, phenotypic characteristics including tree height and flower color did not change in the transplanted individuals after cutting propagation. According to flower color measurements, R. kiusianum and R. kaempferi belonged to purple and red series, respectively, and their natural hybrids belonged to either the red or purple series. HPLC analysis showed that the petals of most R. kiusianum and natural hybrids contained both cyanidin and delphinidin series pigments, while the petals of R. kaempferi contained only cyanidin series pigments. However, one R. kiusianum individual in the purple series contained only cyanidin series pigments and one natural hybrid individual in the red series contained both cyanidin and delphinidin series pigments. These individuals were thought to be influenced by co-pigmentation or a lack thereof, respectively. All samples expressed F3′H, DFR, and ANS genes in real-time quantitative RT-PCR, and the F3′5′H gene was always expressed in samples containing delphinidin series pigments. These results suggest that the expression of F3′5′H is essential for R. kiusianun and its natural hybrids to produce delphinidin series pigments. This study showed that interspecific hybridization between wild species with purple series flowers and wild species with red series flowers varied the pigment composition and anthocyanin biosynthesis-related gene expression in the natural hybrids, suggesting that it caused the flower color variation in the wild populations in the Kirishima mountains.

AB - We compared anthocyanidin composition patterns and the expression of anthocyanin biosynthesis genes in Rhododendron kiusianum, R. kaempferi, and their natural hybrids from the Kirishima mountain mass. Compared with the habitat, phenotypic characteristics including tree height and flower color did not change in the transplanted individuals after cutting propagation. According to flower color measurements, R. kiusianum and R. kaempferi belonged to purple and red series, respectively, and their natural hybrids belonged to either the red or purple series. HPLC analysis showed that the petals of most R. kiusianum and natural hybrids contained both cyanidin and delphinidin series pigments, while the petals of R. kaempferi contained only cyanidin series pigments. However, one R. kiusianum individual in the purple series contained only cyanidin series pigments and one natural hybrid individual in the red series contained both cyanidin and delphinidin series pigments. These individuals were thought to be influenced by co-pigmentation or a lack thereof, respectively. All samples expressed F3′H, DFR, and ANS genes in real-time quantitative RT-PCR, and the F3′5′H gene was always expressed in samples containing delphinidin series pigments. These results suggest that the expression of F3′5′H is essential for R. kiusianun and its natural hybrids to produce delphinidin series pigments. This study showed that interspecific hybridization between wild species with purple series flowers and wild species with red series flowers varied the pigment composition and anthocyanin biosynthesis-related gene expression in the natural hybrids, suggesting that it caused the flower color variation in the wild populations in the Kirishima mountains.

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