Toward the 'golden' era: The status in uncovering the regulatory control of carotenoid accumulation in plants
- PMID: 31779888
- DOI: 10.1016/j.plantsci.2019.110331
Toward the 'golden' era: The status in uncovering the regulatory control of carotenoid accumulation in plants
Abstract
Carotenoids are essential pigments to plants and important natural products to humans. Carotenoids as both primary and specialized metabolites fulfill multifaceted functions in plants. As such, carotenoid accumulation (a net process of biosynthesis, degradation and sequestration) is subjected to complicated regulation throughout plant life cycle in response to developmental and environmental signals. Investigation of transcriptional regulation of carotenoid metabolic genes remains the focus in understanding the regulatory control of carotenoid accumulation. While discovery of bona fide carotenoid metabolic regulators is still challenging, the recent progress of identification of various transcription factors and regulators helps us to construct hierarchical regulatory network of carotenoid accumulation. The elucidation of carotenoid regulatory mechanisms at protein level and in chromoplast provides some insights into post-translational regulation of carotenogenic enzymes and carotenoid sequestration in plastid sink. This review briefly describes the pathways and main flux-controlling steps for carotenoid accumulation in plants. It highlights our recent understanding of the regulatory mechanisms underlying carotenoid accumulation at both transcriptional and post-translational levels. It also discusses the opportunities to expand toolbox for further shedding light upon the intrinsic regulation of carotenoid accumulation in plants.
Keywords: Biosynthesis; Carotenoids; Chromoplast; Transcription factor; Transcriptional and post-translational regulation.
Published by Elsevier B.V.
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