Transcription Factors FHY3 and FAR1 Regulate Light-Induced <i>CIRCADIAN CLOCK ASSOCIATED1</i> Gene Expression in Arabidopsis

Liu, Yang; Ma, Ming; Li, Gang; Li, Yuan; Xie, Yurong; Wei, Hongbin; Ma, Xiaojing; Li, Quanquan; Devlin, Paul F.; Xu, Xiaodong; Wang, Haiyang

doi:10.1105/tpc.19.00981

Cited by 56 publications

(64 citation statements)

References 55 publications

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“…Although AtFRS9 does not have a FAR1-binding domain, it is assumed that it might interact with other FHY3/FAR1 members [ 15 ]. Through the expression regulation of the downstream target genes, AtFHY3/AtFAR1 was reported to play important roles in light signal transduction, and plant growth and development [ 11 , 16 ], e.g., photomorphogenesis [ 12 ], the circadian clock [ 23 ], branching and flowering time [ 24 , 25 ], chlorophyll biosynthesis [ 26 ], chloroplast division [ 21 , 22 ], starch synthesis [ 27 ], the abscisic acid response [ 28 ], the oxidative stress response [ 29 ], plant immunity [ 30 ], the low phosphorus response [ 31 ], and the growth and defense response balance [ 32 , 33 ]. Although many functions of FAR1 and FHY3 have been identified, it was found that FAR1 and FHY3 play more roles than expected, and the functions of other members of the FHY3/FAR1 family are still not clear.…”

Section: Introductionmentioning

confidence: 99%

Genome-Wide Identification and Characterization of the CsFHY3/FAR1 Gene Family and Expression Analysis under Biotic and Abiotic Stresses in Tea Plants (Camellia sinensis)

Liu

Zhao

et al. 2021

Plants

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The FHY3/FAR1 transcription factor family, derived from transposases, plays important roles in light signal transduction, and in the growth and development of plants. However, the homologous genes in tea plants have not been studied. In this study, 25 CsFHY3/FAR1 genes were identified in the tea plant genome through a genome-wide study, and were classified into five subgroups based on their phylogenic relationships. Their potential regulatory roles in light signal transduction and photomorphogenesis, plant growth and development, and hormone responses were verified by the existence of the corresponding cis-acting elements. The transcriptome data showed that these genes could respond to salt stress and shading treatment. An expression analysis revealed that, in different tissues, especially in leaves, CsFHY3/FAR1s were strongly expressed, and most of these genes were positively expressed under salt stress (NaCl), and negatively expressed under low temperature (4°C) stress. In addition, a potential interaction network demonstrated that PHYA, PHYC, PHYE, LHY, FHL, HY5, and other FRSs were directly or indirectly associated with CsFHY3/FAR1 members. These results will provide the foundation for functional studies of the CsFHY3/FAR1 family, and will contribute to the breeding of tea varieties with high light efficiency and strong stress resistance.

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Section: Introductionmentioning

confidence: 99%

Genome-Wide Identification and Characterization of the CsFHY3/FAR1 Gene Family and Expression Analysis under Biotic and Abiotic Stresses in Tea Plants (Camellia sinensis)

Liu

Zhao

et al. 2021

Plants

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“…FAR1 binds to the promoter of HEMB1 , which encodes 5-aminolevulinic acid dehydratase in the chlorophyll biosynthetic pathway, activating expression (Tang et al, 2012). Moreover, FAR1 is also important in the resetting of the circadian clock by red light downstream of multiple phytochrome photoreceptors (Liu et al, 2020). It is tempting to suggest that WHY1 functions in the circadian regulation of chloroplast development through the repression FAR1 expression.…”

Section: Discussionmentioning

confidence: 99%

“…FAR1 also resets the circadian clock in response to red light, a process that is downstream of multiple phytochrome photoreceptors. FAR1 binds to a FHY3/FAR1 binding site (FBS) that activates the expression of elongation factor 4 (ELF4) and circadian clock associated 1 (CLOCK ASSOCIATED1 ; CCA1) to reset the clock (Liu et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

A new factor in the circadian control of barley chloroplast development

Fang¹,

Razak²,

Karpińska³

et al. 2020

Preprint

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Photoperiod and circadian controls play crucial roles in the regulation of chloroplast biogenesis. To understand more about the regulation of this process, we compared the greening of the first leaves of wild type barley and two WHIRLY1 (WHY1)-deficient lines. Seedlings were grown in darkness for 4 days prior and then exposed to light at the beginning of the photoperiod on the 5th day or under standard photoperiod conditions. The accumulation of chlorophyll, as well plastid-encoded photosynthetic transcripts and proteins was delayed in the WHY1-deficient lines under standard photoperiod conditions because of defects in plastid gene expression, ribosomal processing and photosynthetic protein accumulation. The acquisition of full photosynthetic capacity was delayed by about 11 days in the first leaves and the newly forming leaves of the WHY1-deficient lines compared to the wild type. However, the light-dependent accumulation of pigments, transcripts and photosynthetic proteins was similar in all lines when etiolated seedlings were exposed to light. These results demonstrate that WHY1 is required for the integration of photoperiod-dependent signalling and chloroplast development in barley leaves.

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“…Recent discovery showing that FHY3 and FAR1, phytochrome signal transducers, are necessary for the light-induced CCA1 expression is particularly illuminating. FHY3 and FAR1 activate CCA1 expression through direct binding to its promoter, but dark-activated PIF5 suppresses the transcription of CCA1 (Liu et al, 2020). Under diurnal condition, the role of FHY3/FAR1 in activating CCA1 transcription is antagonistically controlled through interaction with TOC1 and PIF5, leading to daily oscillation of the CCA1 expression.…”

Section: Leaf Senescence and Circadian Clockmentioning

confidence: 99%

The Role of Light and Circadian Clock in Regulation of Leaf Senescence

et al. 2021

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Leaf senescence is an integrated response of the cells to develop age information and various environmental signals. Thus, some of the genes involved in the response to environmental changes are expected to regulate leaf senescence. Light acts not only as the primary source of energy for photosynthesis but also as an essential environmental cue that directly control plant growth and development including leaf senescence. The molecular mechanisms linking light signaling to leaf senescence have recently emerged, exploring the role of Phytochrome-Interacting Factors (PIFs) as a central player leading to diverse senescence responses, senescence-promoting gene regulatory networks (GRNs) involving PIFs, and structural features of transcription modules in GRNs. The circadian clock is an endogenous time-keeping system for the adaptation of organisms to changing environmental signals and coordinates developmental events throughout the life of the plant. Circadian rhythms can be reset by environmental signals, such as light-dark or temperature cycles, to match the environmental cycle. Research advances have led to the discovery of the role of core clock components as senescence regulators and their underlying signaling pathways, as well as the age-dependent shortening of the circadian clock period. These discoveries highlight the close relationship between the circadian system and leaf senescence. Key issues remain to be elucidated, including the effect of light on leaf senescence in relation to the circadian clock, and the identification of key molecules linking aging, light, and the circadian clock, and integration mechanisms of various senescence-affecting signals at the multi-regulation levels in dynamics point of view.

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Transcription Factors FHY3 and FAR1 Regulate Light-Induced CIRCADIAN CLOCK ASSOCIATED1 Gene Expression in Arabidopsis

Cited by 56 publications

References 55 publications

Genome-Wide Identification and Characterization of the CsFHY3/FAR1 Gene Family and Expression Analysis under Biotic and Abiotic Stresses in Tea Plants (Camellia sinensis)

Genome-Wide Identification and Characterization of the CsFHY3/FAR1 Gene Family and Expression Analysis under Biotic and Abiotic Stresses in Tea Plants (Camellia sinensis)

A new factor in the circadian control of barley chloroplast development

The Role of Light and Circadian Clock in Regulation of Leaf Senescence

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