首页|Flavonoid extracts from chrysanthemum with appropriate anthocyanins turn blue when exposed to iron ions

Flavonoid extracts from chrysanthemum with appropriate anthocyanins turn blue when exposed to iron ions

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Although some species that accumulate only cyanidin(Cy)in nature can produce blue flowers through iron ions,there has been no evidence of blue chrysanthemums being generated in this manner.This study revealed that flavonoid extracts from the ray florets of the chrysan-themum cultivar'Wandai Fengguang'turned blue when exposed to Fe3+.Samples that could turn blue were labeled as CB(Cy-determined blue flowers),while samples that did not turn blue were labeled as CN(Cy-determined non-blue flowers).After a series of experiments,a stable screening system was established using flavonoid extracts containing NaAc buffer at pH 5.5 and a total anthocyanin concentration(TAC)of 30 μmol·L-1,and the addition of Fe3+from 0 to 0.25 μmol·L-1 allowed for the selection of five CB samples from 39 chrysanthemum cultivars.All five CB samples exhibited flower color phenotypes that belonged to Cluster-I with redness(a*)values ranging from 29.03 to 45.99,yellowness(b*)values from-11.31 to 3.77,and brightness(L*)values from 29.07 to 45.99.Additionally,the ratio of TAC to total luteolin concentration(TLC)was found to be a critical factor for distinguishing between CB and CN samples.To realize the desired blue hue in the flavonoid extracts with the participation of Fe3+,a TAC to TLC ratio of 2.25 and above is required.Moreover,the protoplasts and ray florets of CB samples that turned blue with the involvement of Fe2+ showed great potential for cultivating blue chrysanthemums through ferric-anthocyanin chelate.Overall,this study reveals that blue flowers can be cultivated through the increase in the iron ion concentration,combined with the accumulation of Cy.

Chrysanthemum × morifoliumCyanidinCopigmentFerric-anthocyanin chelateBlue flower

Yanfei Li、Jiaying Wang、Chenfei Lu、Zhongman Wang、Chengyan Deng、Kang Gao、Jingjing Li、Zhijun Fang、Hao Liu、Yan Hong、Silan Dai

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Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding,National Engineering Research Center for Floriculture,Beijing,Laboratory of Urban and Rural Ecological Environment,Key Laboratory for Genetics and Breeding of Forest Trees and Ornamental Plants of Ministry of Education,School of Landscape Architecture,Beijing Forestry University,Beijing 100083,China

Beijing Greenland Maintenance and Management Service Center,Beijing 102211,China

Beijing North Asia Landscape Co.,Beijing 102211,China

国家自然科学基金国家自然科学基金

3217184932271946

2024

园艺学报(英文版)

园艺学报(英文版)

CSTPCD
ISSN:
年,卷(期):2024.10(3)
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