English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Chrysanthemum morifolium , one of the most economically important ornamental crops worldwide, is well-known for the elaborate and complex inflorescence which is composed of both bilaterally symmetrical ray florets and radially symmetrical disc florets. Despite continuing efforts, the molecular mechanisms underlying regulation of the two flower types are still unclear so far.  CYC -like proteins have been shown to control flower symmetry or regulate flower-type identity in several angiosperm plant lineages. In this study, we conducted comparative analysis of the  CmCYC2  genes in two chrysanthemum cultivars and their F1 progenies with various whorls of ray florets. Six  CmCYC  genes were identified and sequenced, all of which were grouped into the CYC2 subclade. All the six  CmCYC2  genes were predominantly expressed in reproductive organs, and in particular in the petal of ray florets. Of these genes, the transcription level of  CmCYC2c  was highly up-regulated in ray florets of the double-ray flowered heads. In addition, the result that  CmCYC2c  was highly expressed at key developing stages indicates its role in regulating petal development. Furthermore, overexpression of  CmCYC2c  in  C. lavandulifolium , one of the original species of  C. morifolium , led to significant increase in flower numbers and petal ligule length of ray florets. Besides  CmCYC2c , the expression of  CmCYC2f  was also significantly up-regulated in transgenic lines, implying a possible role in regulating development of ray florets. Both results of expression patterns and transgenic phenotypes suggest that  CmCYC2c  is involved in regulating ray floret identity in the chrysanthemum. This study will be useful for genetic manipulation of flower shape in chrysanthemum and hence promote the process of molecular breeding.

Identification and Characterization of CYC-Like Genes in Regulation of Ray Floret Development in Chrysanthemum morifolium