New insight into the molecular mechanism of colour differentiation among floral segments in orchids

Bai Jun Li, Bao Qiang Zheng, Jie Yu Wang, Wen Chieh Tsai, Hsiang Chia Lu, Long Hai Zou, Xiao Wan, Di Yang Zhang, Hong Juan Qiao, Zhong Jian Liu, Yan Wang

研究成果: Article同行評審

77 引文 斯高帕斯(Scopus)

摘要

An unbalanced pigment distribution among the sepal and petal segments results in various colour patterns of orchid flowers. Here, we explored this type of mechanism of colour pattern formation in flowers of the Cattleya hybrid ‘KOVA’. Our study showed that pigment accumulation displayed obvious spatiotemporal specificity in the flowers and was likely regulated by three R2R3-MYB transcription factors. Before flowering, RcPAP1 was specifically expressed in the epichile to activate the anthocyanin biosynthesis pathway, which caused substantial cyanin accumulation and resulted in a purple-red colour. After flowering, the expression of RcPAP2 resulted in a low level of cyanin accumulation in the perianths and a pale pink colour, whereas RcPCP1 was expressed only in the hypochile, where it promoted α-carotene and lutein accumulation and resulted in a yellow colour. Additionally, we propose that the spatiotemporal expression of different combinations of AP3- and AGL6-like genes might participate in KOVA flower colour pattern formation.

原文English
文章編號89
期刊Communications Biology
3
發行號1
DOIs
出版狀態Published - 2020 12月 1

All Science Journal Classification (ASJC) codes

  • 醫藥(雜項)
  • 一般生物化學,遺傳學和分子生物學
  • 一般農業與生物科學

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