Flower Color Variegation in Single Petal Flowering Peach

Uematsu, Chiyomi; Uozumi, K.; Makino, Izumi; Arakawa, Osamu; Katayama, Haruki; Martin, C.

doi:10.17660/actahortic.2012.929.42

Cited by 1 publication

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“…chrysanthemum (Chrysanthemum indicum) is also lower than in the white chrysanthemum (Chen et al, 2012b;Uematsu et al, 2012). In addition, our results showed high levels of CHI2 expression in F, providing a large number of substrates and leading to the accumulation of Cy, and the development of the red spathe color.…”

Section: The Inhibitory Effects Of Chi and Dfr Play Important Roles In The Formation Of Light-colored Spathes In Thesupporting

confidence: 46%

Mechanism Underlying Color Variation in Calla Lily Spathes Based on Transcriptomic Analysis

Fang

Lei

et al. 2021

J. Amer. Soc. Hort. Sci.

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The calla lily (Zantedeschia hybrida) is a valued ornamental plant due to its unique shape and color variations. To determine the mechanisms responsible for color development in the calla lily spathe, we conducted a comparative transcriptomic analysis of the spathes of the black [Black Girl (B)], pink [Romantic (P)], and white [Ventura (W)] cultivars. The gene expression patterns in six spathe colors, including the preceding three colors as well as the amaranth [Promise (N)], red [Figo (F)], and yellow [Sun Club (Y)] cultivars were analyzed by real-time quantitative polymerase chain reaction (PCR). Transcriptomic analysis identified 25,165 differentially expressed genes. The transcription abundance and expression level of genes annotated as anthocyanidin reductase (ANR1, ANR2), basic-helix-loop-helix (bHLH1), and glutathione S-transferases (GST1) were significantly upregulated in B, and the expression of anthocyanidin synthase (ANS) was highest in B except for N. However, chalcone isomerase (CHI2) and dihydroflavonol 4-reductase (DFR1, DFR2) were expressed at significantly lower levels in P, W, and Y. Correlation analysis revealed that bHLH1 might act as a positive regulator of ANS expression, promoting anthocyanin synthesis. Moreover, GST1-encoded proteins may be related to the accumulation and transport of both anthocyanin and procyanidin in the calla lily spathe. It is speculated that the formation of the black spathe is related to the accumulation of anthocyanins and procyanidins. However, the low expression of CHI2, DFR1, and DFR2 may result in the inhibition of anthocyanin synthesis, which may lead to lightening of the spathe color. This preliminary study revealed the mechanism responsible for calla lily spathe color, identifying the key genes involved, thus providing effective gene resources and a theoretical basis for flower color molecular breeding.

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Section: The Inhibitory Effects Of Chi and Dfr Play Important Roles In The Formation Of Light-colored Spathes In Thesupporting

confidence: 46%