Research progresses on regulatory mechanisms of carotenoid-mediated plant flower coloration

doi:10.12302/j.issn.1000-2006.202205016

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (6): 73-82.doi: 10.12302/j.issn.1000-2006.202205016

Special Issue: 南京林业大学120周年校庆特刊

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Research progresses on regulatory mechanisms of carotenoid-mediated plant flower coloration

HAO Zhaodong(), SHI Jisen, CHEN Jinhui()

Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China

Received:2022-05-12 Revised:2022-08-17 Online:2022-11-30 Published:2022-11-24
Contact: CHEN Jinhui E-mail:haozd@njfu.edu.cn;chenjh@njfu.edu.cn

Abstract

Abstract:

Color is an important flower trait that plays a key role in ornamental horticulture, reproductive ecology, and species evolution of flowering plants. The key determinants of flower coloration in flowering plants are synthesis and deposition of flower pigments. As a family of natural pigments, carotenoids not only have nutritional and pharmacological properties, but also are the main chromogenic pigments during flower coloration of many flowering plants. Here, we review the pathway for carotenoid metabolism and its related genes and summarize the effects of carotenoid metabolic gene expression and transcriptional regulation on the carotenoid accumulation and flower coloration. At present, it is well known that the expression of carotenoid metabolic genes in flowers is closely related to the carotenoid accumulation and flower coloration; however, research on the mechanisms of transcriptional regulation of these genes in flowers is still in the early stage. In particular, flowers seem to adopt different strategies for fine-tuning carotenoid biosynthesis and accumulation compared to the other organs like leaves and fruits. Additionally, no consensus has been found among different plant species. Based on the current research progress, we prospect the future research on the regulation mechanisms of carotenoid-mediated flower coloration. With the rapid development of high-throughput omics technologies and molecular biology techniques, we suggest the combination of multi-omics such as genomics, transcriptomics, metabolomics and the latest single-cell omics and spatial omics, and genetic transformation and genome editing technology represented by CRISPR/Cas9 to de novo construct the specific molecular regulatory network of carotenoid metabolism during flower coloration of a variety of plants. We hope to provide a useful reference for the further research on flower color variation and evolution mediated by carotenoids and flower color breeding.

Key words: flower color, carotenoid pigment, metabolic pathway, transcriptional regulation

CLC Number:

HAO Zhaodong, SHI Jisen, CHEN Jinhui. Research progresses on regulatory mechanisms of carotenoid-mediated plant flower coloration[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2022, 46(6): 73-82.

Figures/Tables 2

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Research progresses on regulatory mechanisms of carotenoid-mediated plant flower coloration

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