Chlorophyll biosynthesis is one of the most important cellular processes and is essential for plant photosynthesis. After germination under the soil, dark-grown seedlings are etiolated and accumulate the chlorophyll precursor protochlorophyllide (Pchlide) in cotyledons. Upon exposure to light, Pchlide is rapidly converted to chlorophyll to initiate photoautotrophic growth. In this light-regulated de-etiolation process, multiple endogenous phytohormones are also involved. Although the co-regulation of seedling greening by light and hormones has long been observed, recent studies greatly advanced our understanding of their interplay by identifying the key components connecting these pathways. The integrators, such as PHYTOCHROME-INTERACTING FACTORs, ELONGATED HYPOCOTYL 5, ETHYLENE INSENSTIVE 3 and DELLA proteins, are key transcription regulators in light or hormone signaling pathways. This review focuses on these integrators and illustrates the regulatory networks of light and hormone interactions in chlorophyll biosynthesis.
Interplay between Light and Plant Hormones in the Control of Arabidopsis Seedling Chlorophyll Biosynthesis
Xiaoqin Liu,Yue Li,Shangwei Zhong
Published 2017 in Frontiers in Plant Science
ABSTRACT
PUBLICATION RECORD
- Publication year
2017
- Venue
Frontiers in Plant Science
- Publication date
2017-08-17
- Fields of study
Biology, Medicine, Environmental Science
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
CITATION MAP
EXTRACTION MAP
CLAIMS
CONCEPTS
- arabidopsis seedling chlorophyll biosynthesis
Chlorophyll production in Arabidopsis seedlings during early development.
- della proteins
A family of DELLA growth-repressor proteins discussed as integrators in hormone-light crosstalk.
- elongated hypocotyl 5
A light-response transcription factor discussed as an integrator of signaling during seedling greening.
- ethylene insenstive 3
An ethylene-response transcription factor discussed as an integrator of signaling during seedling greening.
- hormone signaling pathway
The hormone-response signaling branch that interacts with light signaling during seedling greening.
- light-regulated de-etiolation
The transition from dark-grown etiolated seedlings to light-grown seedlings after illumination.
- light signaling pathway
The light-response signaling branch that feeds into seedling greening and chlorophyll biosynthesis.
- phytochrome-interacting factors
A family of light-response transcription factors named in the review as pathway integrators.
- phytohormones
Plant hormone signals discussed as part of the light-hormone interplay in seedling greening.
REFERENCES
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