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Singh SK, Srivastava A. Decoding the plant clock: a review of mathematical models for the circadian regulatory network. PLANT MOLECULAR BIOLOGY 2024; 114:93. [PMID: 39207587 DOI: 10.1007/s11103-024-01493-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 08/15/2024] [Indexed: 09/04/2024]
Abstract
Most organisms have evolved specific mechanisms to respond to changes in environmental conditions such as light and temperature over the course of day. These periodic changes in the physiology and behaviour of organisms, referred to as circadian rhythms, are a consequence of intricate molecular mechanisms in the form of transcription and translational feedback loops. The plant circadian regulatory network is a complex web of interconnected feedback loops involving various transcription factors such as CCA1, LHY, PRRs, TOC1, LUX, ELF3, ELF4, RVE8, and more. This network enables plants to adapt and thrive in diverse environmental conditions. It responds to entrainment signals, including light, temperature, and nutrient concentrations and interacts with most of the physiological functions such as flowering, growth and stress response. Mathematical modelling of these gene regulatory networks enables a deeper understanding of not only the function but also the perturbations that may affect the plant growth and function with changing climate. Over the years, numerous mathematical models have been developed to understand the diverse aspects of plant circadian regulation. In this review, we have delved into the systematic development of these models, outlining the model components and refinements over time. We have also highlighted strengths and limitations of each of the models developed so far. Finally, we conclude the review by describing the prospects for investigation and advancement of these models for better understanding of plant circadian regulation.
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Affiliation(s)
- Shashank Kumar Singh
- Department of Biological Sciences and Engineering, Indian Institute of Technology Gandhinagar, Gandhinagar, Gujarat, India
| | - Ashutosh Srivastava
- Department of Biological Sciences and Engineering, Indian Institute of Technology Gandhinagar, Gandhinagar, Gujarat, India.
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2
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Liu Z, Liu W, Wang Z, Xie Z, Qi K, Yue D, Li Y, Zhang S, Wu J, Wang P. Molecular characterization of PSEUDO RESPONSE REGULATOR family in Rosaceae and function of PbPRR59a and PbPRR59b in flowering regulation. BMC Genomics 2024; 25:794. [PMID: 39169310 PMCID: PMC11340073 DOI: 10.1186/s12864-024-10720-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Accepted: 08/16/2024] [Indexed: 08/23/2024] Open
Abstract
BACKGROUND PSEUDO RESPONSE REGULATOR (PRR) genes are essential components of circadian clock, playing vital roles in multiple processes including plant growth, flowering and stress response. Nonetheless, little is known about the evolution and function of PRR family in Rosaceae species. RESULTS In this study, a total of 43 PRR genes in seven Rosaceae species were identified through comprehensive analysis. The evolutionary relationships were analyzed with phylogenetic tree, duplication events and synteny. PRR genes were classified into three groups (PRR1, PRR5/9, PRR3/7). The expansion of PRR family was mainly derived from dispersed and whole-genome duplication events. Purifying selection was the major force for PRR family evolution. Synteny analysis indicated the existence of multiple orthologous PRR gene pairs between pear and other Rosaceae species. Moreover, the conserved motifs of eight PbPRR proteins supported the phylogenetic relationship. PRR genes showed diverse expression pattern in various tissues of pear (Pyrus bretschneideri). Transcript analysis under 12-h light/ dark cycle and constant light conditions revealed that PRR genes exhibited distinct rhythmic oscillations in pear. PbPRR59a and PbPRR59b highly homologous to AtPRR5 and AtPRR9 were cloned for further functional verification. PbPRR59a and PbPRR59b proteins were localized in the nucleus. The ectopic overexpression of PbPRR59a and PbPRR59b significantly delayed flowering in Arabidopsis transgenic plants by repress the expression of AtGI, AtCO and AtFT under long-day conditions. CONCLUSIONS These results provide information for exploring the evolution of PRR genes in plants, and contribute to the subsequent functional studies of PRR genes in pear and other Rosaceae species.
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Affiliation(s)
- Zhe Liu
- School of Pharmacy, Changzhi Medical College, Changzhi, 046000, China
- Sanya Institute of Nanjing Agricultural University, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Key Laboratory for Horticultural Crop Breeding, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Weijuan Liu
- Sanya Institute of Nanjing Agricultural University, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Key Laboratory for Horticultural Crop Breeding, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhangqing Wang
- Sanya Institute of Nanjing Agricultural University, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Key Laboratory for Horticultural Crop Breeding, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhihua Xie
- Sanya Institute of Nanjing Agricultural University, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Key Laboratory for Horticultural Crop Breeding, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Kaijie Qi
- Sanya Institute of Nanjing Agricultural University, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Key Laboratory for Horticultural Crop Breeding, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Dong Yue
- Sanya Institute of Nanjing Agricultural University, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Key Laboratory for Horticultural Crop Breeding, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yu Li
- Sanya Institute of Nanjing Agricultural University, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Key Laboratory for Horticultural Crop Breeding, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shaoling Zhang
- Sanya Institute of Nanjing Agricultural University, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Key Laboratory for Horticultural Crop Breeding, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Juyou Wu
- Sanya Institute of Nanjing Agricultural University, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Key Laboratory for Horticultural Crop Breeding, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, China
| | - Peng Wang
- Sanya Institute of Nanjing Agricultural University, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Key Laboratory for Horticultural Crop Breeding, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.
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3
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Kim YJ, Kim WY, Somers DE. HOS15-mediated turnover of PRR7 enhances freezing tolerance. THE NEW PHYTOLOGIST 2024. [PMID: 39155726 DOI: 10.1111/nph.20062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2024] [Accepted: 07/29/2024] [Indexed: 08/20/2024]
Abstract
Arabidopsis PSEUDORESPONSE REGULATOR7 (PRR7) is a core component of the circadian oscillator which also plays a crucial role in freezing tolerance. PRR7 undergoes proteasome-dependent degradation to discretely phase maximal expression in early evening. While its repressive activity on downstream genes is integral to cold regulation, the mechanism of the conditional regulation of the PRR7 abundance is unknown. We used mutant analysis, protein interaction and ubiquitylation assays to establish that the ubiquitin ligase adaptor, HIGH EXPRESSION OF OSMOTICALLY RESPONSIVE GENE 15 (HOS15), controls the protein accumulation pattern of PRR7 through direct protein-protein interactions at low temperatures. Freezing tolerance and electrolyte leakage assays show that PRR7 enhances cold temperature sensitivity, supported by ChIP-qPCR at C-REPEAT BINDING FACTOR1 (CBF1) and COLD-REGULATED 15A (COR15A) promoters where PRR7 levels were higher in hos15 mutants. HOS15 mediates PRR7 turnover through enhanced ubiquitylation at low temperature in the dark. Under the same conditions, increased PRR7 association with the promoters of CBFs and COR15A in hos15 correlates with decreased CBF1 and COR15A transcription and enhanced freezing sensitivity. We propose a novel mechanism whereby HOS15-mediated degradation of PRR7 provides an intersection between the circadian system and other cold acclimation pathways that lead to increased freezing tolerance.
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Affiliation(s)
- Yeon Jeong Kim
- Department of Molecular Genetics, The Ohio State University, Columbus, OH, 43210, USA
| | - Woe-Yeon Kim
- Division of Applied Life Science (BK21 Four), Plant Biological Rhythm Research Center (PBRRC), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju, 52828, Korea
| | - David E Somers
- Department of Molecular Genetics, The Ohio State University, Columbus, OH, 43210, USA
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4
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Kim YJ, Kim WY, Somers DE. HOS15-mediated turnover of PRR7 enhances freezing tolerance. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.20.599783. [PMID: 38979283 PMCID: PMC11230174 DOI: 10.1101/2024.06.20.599783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Arabidopsis PSEUDO RESPONSE REGULATOR7 (PRR7) is a core component of the circadian oscillator which also plays a crucial role in freezing tolerance. PRR7 undergoes proteasome-dependent degradation to discretely phase maximal expression in early evening. While its transcriptional repressive activity on downstream genes is integral to cold regulation, the mechanism of the conditional regulation of the PRR7 protein activity is unknown. We used double mutant analysis, protein interaction and ubiquitylation assays to establish that the ubiquitin ligase adaptor, HIGH EXPRESSION OF OSMOTICALLY RESPONSIVE GENE 15 (HOS15), controls the protein accumulation pattern of PRR7 through direct protein-protein interactions. Freezing tolerance and electrolyte leakage assays show that PRR7 enhances cold temperature sensitivity, supported by ChIP-qPCR at C-REPEAT BINDING FACTOR (CBF) and COLD REGULATED 15A (COR15A) promoters where PRR7 levels were higher in hos15 mutants. We establish that HOS15 mediates PRR7 protein turnover through enhanced ubiquitylation at low temperature in the dark. Under the same conditions, increased PRR7 association with the promoter regions of CBFs and COR15A in hos15 correlates with decreased CBF1 and COR15A transcription and enhanced freezing sensitivity. We propose a novel mechanism whereby HOS15-mediated regulation of PRR7 provides an intersection between the circadian system and other cold acclimation pathways leading to freezing tolerance through upregulation of CBF1 and COR15A.
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Affiliation(s)
- Yeon Jeong Kim
- Department of Molecular Genetics, The Ohio State University, Columbus, OH 43210, USA
| | - Woe Yeon Kim
- Division of Applied Life Science (BK21 Four), Plant Biological Rhythm Research Center (PBRRC), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 52828, Republic of Korea
| | - David E Somers
- Department of Molecular Genetics, The Ohio State University, Columbus, OH 43210, USA
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5
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Aoyama H, Arae T, Yamashita Y, Toyoda A, Naito S, Sotta N, Chiba Y. Impact of translational regulation on diel expression revealed by time-series ribosome profiling in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 118:1889-1906. [PMID: 38494830 DOI: 10.1111/tpj.16716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 02/19/2024] [Accepted: 02/28/2024] [Indexed: 03/19/2024]
Abstract
Plants have developed the ability to adjust to the day/night cycle through the expression of diel genes, which allow them to effectively respond to environmental changes and optimise their growth and development. Diel oscillations also have substantial implications in many physiological processes, including photosynthesis, floral development, and environmental stress responses. The expression of diel genes is regulated by a combination of the circadian clock and responses to environmental cues, such as light and temperature. A great deal of information is available on the transcriptional regulation of diel gene expression. However, the extent to which translational regulation is involved in controlling diel changes in expression is not yet clear. To investigate the impact of translational regulation on diel expression, we conducted Ribo-seq and RNA-seq analyses on a time-series sample of Arabidopsis shoots cultivated under a 12 h light/dark cycle. Our results showed that translational regulation is involved in about 71% of the genes exhibiting diel changes in mRNA abundance or translational activity, including clock genes, many of which are subject to both translational and transcriptional control. They also revealed that the diel expression of glycosylation and ion-transporter-related genes is mainly established through translational regulation. The expression of several diel genes likely subject to translational regulation through upstream open-reading frames was also determined.
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Affiliation(s)
- Haruka Aoyama
- Graduate School of Life Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Toshihiro Arae
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, 277-8562, Japan
| | - Yui Yamashita
- Graduate School of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan
| | - Atsushi Toyoda
- Advanced Genomics Center, National Institute of Genetics, Mishima, 411-8540, Japan
| | - Satoshi Naito
- Graduate School of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan
| | - Naoyuki Sotta
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Yukako Chiba
- Graduate School of Life Science, Hokkaido University, Sapporo, 060-0810, Japan
- Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
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6
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Wang F, Han T, Jeffrey Chen Z. Circadian and photoperiodic regulation of the vegetative to reproductive transition in plants. Commun Biol 2024; 7:579. [PMID: 38755402 PMCID: PMC11098820 DOI: 10.1038/s42003-024-06275-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 05/01/2024] [Indexed: 05/18/2024] Open
Abstract
As sessile organisms, plants must respond constantly to ever-changing environments to complete their life cycle; this includes the transition from vegetative growth to reproductive development. This process is mediated by photoperiodic response to sensing the length of night or day through circadian regulation of light-signaling molecules, such as phytochromes, to measure the length of night to initiate flowering. Flowering time is the most important trait to optimize crop performance in adaptive regions. In this review, we focus on interplays between circadian and light signaling pathways that allow plants to optimize timing for flowering and seed production in Arabidopsis, rice, soybean, and cotton. Many crops are polyploids and domesticated under natural selection and breeding. In response to adaptation and polyploidization, circadian and flowering pathway genes are epigenetically reprogrammed. Understanding the genetic and epigenetic bases for photoperiodic flowering will help improve crop yield and resilience in response to climate change.
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Affiliation(s)
- Fang Wang
- State Key Laboratory of Wheat Improvement, College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Tongwen Han
- State Key Laboratory of Wheat Improvement, College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Z Jeffrey Chen
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX, 78712, USA.
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7
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Tezuka D, Cho H, Onodera H, Linghu Q, Chijimatsu T, Hata M, Imai R. Redirecting barley breeding for grass production through genome editing of Photoperiod-H1. PLANT PHYSIOLOGY 2024; 195:287-290. [PMID: 38366881 PMCID: PMC11060677 DOI: 10.1093/plphys/kiae075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 01/02/2024] [Accepted: 01/15/2024] [Indexed: 02/18/2024]
Abstract
Genome editing enables precise modification to harness an elite grain-producing barley (Hordeum vulgare L.) cultivar for grass production.
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Affiliation(s)
- Daisuke Tezuka
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba 305-8604, Japan
| | - Huikyong Cho
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba 305-8604, Japan
| | - Hitomi Onodera
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba 305-8604, Japan
| | - Qianyan Linghu
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba 305-8604, Japan
| | | | | | - Ryozo Imai
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba 305-8604, Japan
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba 305-8572, Japan
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8
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Yuan L, Avello P, Zhu Z, Lock SCL, McCarthy K, Redmond EJ, Davis AM, Song Y, Ezer D, Pitchford JW, Quint M, Xie Q, Xu X, Davis SJ, Ronald J. Complex epistatic interactions between ELF3, PRR9, and PRR7 regulate the circadian clock and plant physiology. Genetics 2024; 226:iyad217. [PMID: 38142447 PMCID: PMC10917503 DOI: 10.1093/genetics/iyad217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 08/07/2023] [Accepted: 12/05/2023] [Indexed: 12/26/2023] Open
Abstract
Circadian clocks are endogenous timekeeping mechanisms that coordinate internal physiological responses with the external environment. EARLY FLOWERING3 (ELF3), PSEUDO RESPONSE REGULATOR (PRR9), and PRR7 are essential components of the plant circadian clock and facilitate entrainment of the clock to internal and external stimuli. Previous studies have highlighted a critical role for ELF3 in repressing the expression of PRR9 and PRR7. However, the functional significance of activity in regulating circadian clock dynamics and plant development is unknown. To explore this regulatory dynamic further, we first employed mathematical modeling to simulate the effect of the prr9/prr7 mutation on the elf3 circadian phenotype. These simulations suggested that simultaneous mutations in prr9/prr7 could rescue the elf3 circadian arrhythmia. Following these simulations, we generated all Arabidopsis elf3/prr9/prr7 mutant combinations and investigated their circadian and developmental phenotypes. Although these assays could not replicate the results from the mathematical modeling, our results have revealed a complex epistatic relationship between ELF3 and PRR9/7 in regulating different aspects of plant development. ELF3 was essential for hypocotyl development under ambient and warm temperatures, while PRR9 was critical for root thermomorphogenesis. Finally, mutations in prr9 and prr7 rescued the photoperiod-insensitive flowering phenotype of the elf3 mutant. Together, our results highlight the importance of investigating the genetic relationship among plant circadian genes.
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Affiliation(s)
- Li Yuan
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Paula Avello
- Department of Mathematics, University of York, York, YO10 5DD, UK
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
| | - Zihao Zhu
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle (Saale) 06108, Germany
| | - Sarah C L Lock
- Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK
| | - Kayla McCarthy
- Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK
| | - Ethan J Redmond
- Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK
| | - Amanda M Davis
- Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK
| | - Yang Song
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Daphne Ezer
- Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK
| | - Jonathan W Pitchford
- Department of Mathematics, University of York, York, YO10 5DD, UK
- Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK
| | - Marcel Quint
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle (Saale) 06108, Germany
| | - Qiguang Xie
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Xiaodong Xu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Seth J Davis
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
- Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK
| | - James Ronald
- Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK
- School of Molecular Biosciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Bower Building, University Avenue, Glasgow G12 8QQ, UK
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9
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Helmsorig G, Walla A, Rütjes T, Buchmann G, Schüller R, Hensel G, von Korff M. early maturity 7 promotes early flowering by controlling the light input into the circadian clock in barley. PLANT PHYSIOLOGY 2024; 194:849-866. [PMID: 37951242 PMCID: PMC10828213 DOI: 10.1093/plphys/kiad551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 09/26/2023] [Indexed: 11/13/2023]
Abstract
Breeding for variation in photoperiod response is crucial to adapt crop plants to various environments. Plants measure changes in day length by the circadian clock, an endogenous timekeeper that allows plants to anticipate changes in diurnal and seasonal light-dark cycles. Here, we describe the early maturity 7 (eam7) locus in barley (Hordeum vulgare), which interacts with PHOTOPERIOD 1 (Ppd-H1) to cause early flowering under non-inductive short days. We identify LIGHT-REGULATED WD 1 (LWD1) as a putative candidate to underlie the eam7 locus in barley as supported by genetic mapping and CRISPR-Cas9-generated lwd1 mutants. Mutations in eam7 cause a significant phase advance and a misregulation of core clock and clock output genes under diurnal conditions. Early flowering was linked to an upregulation of Ppd-H1 during the night and consequent induction of the florigen FLOWERING LOCUS T1 under short days. We propose that EAM7 controls photoperiodic flowering in barley by controlling the light input into the clock and diurnal expression patterns of the major photoperiod response gene Ppd-H1.
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Affiliation(s)
- Gesa Helmsorig
- Institute of Plant Genetics, Heinrich-Heine-Universität Düsseldorf, 40223 Düsseldorf, Germany
| | - Agatha Walla
- Institute of Plant Genetics, Heinrich-Heine-Universität Düsseldorf, 40223 Düsseldorf, Germany
| | - Thea Rütjes
- Institute of Plant Genetics, Heinrich-Heine-Universität Düsseldorf, 40223 Düsseldorf, Germany
| | - Gabriele Buchmann
- Institute of Plant Genetics, Heinrich-Heine-Universität Düsseldorf, 40223 Düsseldorf, Germany
| | - Rebekka Schüller
- Institute of Plant Genetics, Heinrich-Heine-Universität Düsseldorf, 40223 Düsseldorf, Germany
| | - Götz Hensel
- Cluster of Excellence on Plant Sciences “SMART Plants for Tomorrow's Needs”, 40223 Düsseldorf, Germany
- Centre for Plant Genome Engineering, Institute of Plant Biochemistry, Heinrich-Heine-Universität Düsseldorf, 40223 Düsseldorf, Germany
- Division of Molecular Biology, Centre of the Region Hana for Biotechnological and Agriculture Research, Faculty of Science, Palacký University, CZ-779 00 Olomouc, Czech
| | - Maria von Korff
- Institute of Plant Genetics, Heinrich-Heine-Universität Düsseldorf, 40223 Düsseldorf, Germany
- Cluster of Excellence on Plant Sciences “SMART Plants for Tomorrow's Needs”, 40223 Düsseldorf, Germany
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10
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Kim SC, Edgeworth KN, Nusinow DA, Wang X. Circadian clock factors regulate the first condensation reaction of fatty acid synthesis in Arabidopsis. Cell Rep 2023; 42:113483. [PMID: 37995186 PMCID: PMC10842715 DOI: 10.1016/j.celrep.2023.113483] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/16/2023] [Accepted: 11/07/2023] [Indexed: 11/25/2023] Open
Abstract
The circadian clock regulates temporal metabolic activities, but how it affects lipid metabolism is poorly understood. Here, we show that the central clock regulators LATE ELONGATED HYPOCOTYL (LHY) and CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) regulate the initial step of fatty acid (FA) biosynthesis in Arabidopsis. Triacylglycerol (TAG) accumulation in seeds was increased in LHY-overexpressing (LHY-OE) and decreased in lhycca1 plants. Metabolic tracking of lipids in developing seeds indicated that LHY enhanced FA synthesis. Transcript analysis revealed that the expression of genes involved in FA synthesis, including the one encoding β-ketoacyl-ACP synthase III (KASIII), was oppositely changed in developing seeds of LHY/CCA1-OEs and lhycca1. Chromatin immunoprecipitation, electrophoretic mobility shift, and transactivation assays indicated that LHY bound and activated the promoter of KASIII. Furthermore, phosphatidic acid, a metabolic precursor to TAG, inhibited LHY binding to KASIII promoter elements. Our data show a regulatory mechanism for plant lipid biosynthesis by the molecular clock.
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Affiliation(s)
- Sang-Chul Kim
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA
| | - Kristen N Edgeworth
- Donald Danforth Plant Science Center, St. Louis, MO 63132, USA; Department of Biological and Biomedical Sciences, Washington University in St. Louis, St. Louis, MO 63130, USA
| | | | - Xuemin Wang
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA.
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11
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Uehara TN, Takao S, Matsuo H, Saito AN, Ota E, Ono A, Itami K, Kinoshita T, Yamashino T, Yamaguchi J, Nakamichi N. A Small-Molecule Modulator Affecting the Clock-Associated PSEUDO-RESPONSE REGULATOR 7 Amount. PLANT & CELL PHYSIOLOGY 2023; 64:1397-1406. [PMID: 37705303 DOI: 10.1093/pcp/pcad107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 09/01/2023] [Accepted: 09/09/2023] [Indexed: 09/15/2023]
Abstract
Circadian clocks are biological timekeeping systems that coordinate genetic, metabolic and physiological behaviors with the external day-night cycle. The clock in plants relies on the transcriptional-translational feedback loops transcription-translation feedback loop (TTFL), consisting of transcription factors including PSUEDO-RESPONSE REGULATOR (PRR) proteins, plant lineage-specific transcriptional repressors. Here, we report that a novel synthetic small-molecule modulator, 5-(3,4-dichlorophenyl)-1-phenyl-1,7-dihydro-4H-pyrazolo[3,4-d] pyrimidine-4,6(5H)-dione (TU-892), affects the PRR7 protein amount. A clock reporter line of Arabidopsis was screened against the 10,000 small molecules in the Maybridge Hitfinder 10K chemical library. This screening identified TU-892 as a period-lengthening molecule. Gene expression analyses showed that TU-892 treatment upregulates CIRCADIAN CLOCK-ASSOCIATED 1 (CCA1) mRNA expression. TU-892 treatment reduced the amount of PRR7 protein, a transcriptional repressor of CCA1. Other PRR proteins including TIMING OF CAB EXPRESSION 1 were altered less by TU-892 treatment. TU-892-dependent CCA1 upregulation was attenuated in mutants impaired in PRR7. Collectively, TU-892 is a novel type of clock modulator that reduces the levels of PRR7 protein.
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Affiliation(s)
- Takahiro N Uehara
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8602 Japan
| | - Saori Takao
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8602 Japan
| | - Hiromi Matsuo
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8601 Japan
| | - Ami N Saito
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo, 162-0041 Japan
| | - Eisuke Ota
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo, 162-0041 Japan
| | - Azusa Ono
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8602 Japan
| | - Kenichiro Itami
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8602 Japan
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8602 Japan
| | - Toshinori Kinoshita
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8602 Japan
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8602 Japan
| | - Takafumi Yamashino
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8601 Japan
| | - Junichiro Yamaguchi
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo, 162-0041 Japan
| | - Norihito Nakamichi
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8601 Japan
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12
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Liu F, Cai S, Ma Z, Yue H, Xing L, Wang Y, Feng S, Wang L, Dai L, Wan H, Gao J, Chen M, Rahman M, Zhou B. RVE2, a new regulatory factor in jasmonic acid pathway, orchestrates resistance to Verticillium wilt. PLANT BIOTECHNOLOGY JOURNAL 2023; 21:2507-2524. [PMID: 37553251 PMCID: PMC10651145 DOI: 10.1111/pbi.14149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 07/06/2023] [Accepted: 07/27/2023] [Indexed: 08/10/2023]
Abstract
Verticillium dahliae, one of the most destructive fungal pathogens of several crops, challenges the sustainability of cotton productivity worldwide because very few widely-cultivated Upland cotton varieties are resistant to Verticillium wilt (VW). Here, we report that REVEILLE2 (RVE2), the Myb-like transcription factor, confers the novel function in resistance to VW by regulating the jasmonic acid (JA) pathway in cotton. RVE2 expression was essentially required for the activation of JA-mediated disease-resistance response. RVE2 physically interacted with TPL/TPRs and disturbed JAZ proteins to recruit TPL and TPR1 in NINJA-dependent manner, which regulated JA response by relieving inhibited-MYC2 activity. The MYC2 then bound to RVE2 promoter for the activation of its transcription, forming feedback loop. Interestingly, a unique truncated RVE2 widely existing in D-subgenome (GhRVE2D) of natural Upland cotton represses the ability of the MYC2 to activate GhRVE2A promoter but not GausRVE2 or GbRVE2. The result could partially explain why Gossypium barbadense popularly shows higher resistance than Gossypium hirsutum. Furthermore, disturbing the JA-signalling pathway resulted into the loss of RVE2-mediated disease-resistance in various plants (Arabidopsis, tobacco and cotton). RVE2 overexpression significantly enhanced the resistance to VW. Collectively, we conclude that RVE2, a new regulatory factor, plays a pivotal role in fine-tuning JA-signalling, which would improve our understanding the mechanisms underlying the resistance to VW.
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Affiliation(s)
- Fujie Liu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Sheng Cai
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Zhifeng Ma
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Haoran Yue
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Liangshuai Xing
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Yingying Wang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Shouli Feng
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Liang Wang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Lingjun Dai
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Hui Wan
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Jianbo Gao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Mengfei Chen
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
| | - Mehboob‐ur‐ Rahman
- Plant Genomics & Mol. Breeding LabNational Institute for Biotechnology & Genetic Engineering (NIBGE)FaisalabadPakistan
| | - Baoliang Zhou
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co‐sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education)Nanjing Agricultural UniversityNanjingJiangsuChina
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13
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Wang X, Zhang J, Liu X, Kong Y, Han L. The Roles of the PSEUDO-RESPONSE REGULATORs in Circadian Clock and Flowering Time in Medicago truncatula. Int J Mol Sci 2023; 24:16834. [PMID: 38069157 PMCID: PMC10706769 DOI: 10.3390/ijms242316834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/22/2023] [Accepted: 11/25/2023] [Indexed: 12/18/2023] Open
Abstract
PSEUDO-RESPONSE REGULATORs (PRRs) play key roles in the circadian rhythms and flowering in plants. Here, we identified the four members of the PRR family in Medicago truncatula, including MtPRR9a, MtPRR9b, MtPRR7 and MtPRR5, and isolated their Tnt1 retrotransposon-tagged mutants. They were expressed in different organs and were nuclear-localized. The four MtPRRs genes played important roles in normal clock rhythmicity maintenance by negatively regulating the expression of MtGI and MtLHY. Surprisingly, the four MtPRRs functioned redundantly in regulating flowering time under long-day conditions, and the quadruple mutant flowered earlier. Moreover, MtPRR can recruit the MtTPL/MtTPR corepressors and the other MtPRRs to form heterodimers to constitute the core mechanism of the circadian oscillator.
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Affiliation(s)
- Xiao Wang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, China; (X.W.); (J.Z.); (X.L.); (Y.K.)
| | - Juanjuan Zhang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, China; (X.W.); (J.Z.); (X.L.); (Y.K.)
| | - Xiu Liu
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, China; (X.W.); (J.Z.); (X.L.); (Y.K.)
| | - Yiming Kong
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, China; (X.W.); (J.Z.); (X.L.); (Y.K.)
- College of Life Sciences, Shandong Normal University, Jinan 250014, China
| | - Lu Han
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, China; (X.W.); (J.Z.); (X.L.); (Y.K.)
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14
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Rehman S, Bahadur S, Xia W. An overview of floral regulatory genes in annual and perennial plants. Gene 2023; 885:147699. [PMID: 37567454 DOI: 10.1016/j.gene.2023.147699] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/31/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
The floral initiation in angiosperms is a complex process influenced by endogenous and exogenous signals. With this approach, we aim to provide a comprehensive review to integrate this complex floral regulatory process and summarize the regulatory genes and their functions in annuals and perennials. Seven primary paths leading to flowering have been discovered in Arabidopsis under several growth condition that include; photoperiod, ambient temperature, vernalization, gibberellins, autonomous, aging and carbohydrates. These pathways involve a series of interlinked signaling pathways that respond to both internal and external signals, such as light, temperature, hormones, and developmental cues, to coordinate the expression of genes that are involved in flower development. Among them, the photoperiodic pathway was the most important and conserved as some of the fundamental loci and mechanisms are shared even by closely related plant species. The activation of floral regulatory genes such as FLC, FT, LFY, and SOC1 that determine floral meristem identity and the transition to the flowering stage result from the merging of these pathways. Recent studies confirmed that alternative splicing, antisense RNA and epigenetic modification play crucial roles by regulating the expression of genes related to blooming. In this review, we documented recent progress in the floral transition time in annuals and perennials, with emphasis on the specific regulatory mechanisms along with the application of various molecular approaches including overexpression studies, RNA interference and Virus-induced flowering. Furthermore, the similarities and differences between annual and perennial flowering will aid significant contributions to the field by elucidating the mechanisms of perennial plant development and floral initiation regulation.
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Affiliation(s)
- Shazia Rehman
- Sanya Nanfan Research Institution, Hainan University, Haikou 572025, China; College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Saraj Bahadur
- College of Forestry, Hainan University, Haikou 570228 China
| | - Wei Xia
- Sanya Nanfan Research Institution, Hainan University, Haikou 572025, China; College of Tropical Crops, Hainan University, Haikou 570228, China.
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15
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Wu G, Cao A, Wen Y, Bao W, She F, Wu W, Zheng S, Yang N. Characteristics and Functions of MYB (v-Myb avivan myoblastsis virus oncogene homolog)-Related Genes in Arabidopsis thaliana. Genes (Basel) 2023; 14:2026. [PMID: 38002969 PMCID: PMC10671209 DOI: 10.3390/genes14112026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/19/2023] [Accepted: 10/26/2023] [Indexed: 11/26/2023] Open
Abstract
The MYB (v-Myb avivan myoblastsis virus oncogene homolog) transcription factor family is one of the largest families of plant transcription factors which plays a vital role in many aspects of plant growth and development. MYB-related is a subclass of the MYB family. Fifty-nine Arabidopsis thaliana MYB-related (AtMYB-related) genes have been identified. In order to understand the functions of these genes, in this review, the promoters of AtMYB-related genes were analyzed by means of bioinformatics, and the progress of research into the functions of these genes has been described. The main functions of these AtMYB-related genes are light response and circadian rhythm regulation, root hair and trichome development, telomere DNA binding, and hormone response. From an analysis of cis-acting elements, it was found that the promoters of these genes contained light-responsive elements and plant hormone response elements. Most genes contained elements related to drought, low temperature, and defense and stress responses. These analyses suggest that AtMYB-related genes may be involved in A. thaliana growth and development, and environmental adaptation through plant hormone pathways. However, the functions of many genes do not occur independently but instead interact with each other through different pathways. In the future, the study of the role of the gene in different pathways will be conducive to a comprehensive understanding of the function of the gene. Therefore, gene cloning and protein functional analyses can be subsequently used to understand the regulatory mechanisms of AtMYB-related genes in the interaction of multiple signal pathways. This review provides theoretical guidance for the follow-up study of plant MYB-related genes.
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Affiliation(s)
- Guofan Wu
- College of Life Sciences, Northwest Normal University, Lanzhou 730070, China; (A.C.); (Y.W.); (W.B.); (F.S.); (W.W.); (S.Z.); (N.Y.)
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16
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Prasetyaningrum P, Litthauer S, Vegliani F, Battle MW, Wood MW, Liu X, Dickson C, Jones MA. Inhibition of RNA degradation integrates the metabolic signals induced by osmotic stress into the Arabidopsis circadian system. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:5805-5819. [PMID: 37453132 PMCID: PMC10540740 DOI: 10.1093/jxb/erad274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
The circadian clock system acts as an endogenous timing reference that coordinates many metabolic and physiological processes in plants. Previous studies have shown that the application of osmotic stress delays circadian rhythms via 3'-phospho-adenosine 5'-phosphate (PAP), a retrograde signalling metabolite that is produced in response to redox stress within organelles. PAP accumulation leads to the inhibition of exoribonucleases (XRNs), which are responsible for RNA degradation. Interestingly, we are now able to demonstrate that post-transcriptional processing is crucial for the circadian response to osmotic stress. Our data show that osmotic stress increases the stability of specific circadian RNAs, suggesting that RNA metabolism plays a vital role in circadian clock coordination during drought. Inactivation of XRN4 is sufficient to extend circadian rhythms as part of this response, with PRR7 and LWD1 identified as transcripts that are post-transcriptionally regulated to delay circadian progression.
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Affiliation(s)
| | | | - Franco Vegliani
- School of Molecular Biosciences, University of Glasgow, Glasgow G12 8QQ, UK
| | | | | | - Xinmeng Liu
- School of Molecular Biosciences, University of Glasgow, Glasgow G12 8QQ, UK
| | - Cathryn Dickson
- School of Molecular Biosciences, University of Glasgow, Glasgow G12 8QQ, UK
| | - Matthew Alan Jones
- School of Molecular Biosciences, University of Glasgow, Glasgow G12 8QQ, UK
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17
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Zhang Y, Chen G, Deng L, Gao B, Yang J, Ding C, Zhang Q, Ouyang W, Guo M, Wang W, Liu B, Zhang Q, Sung WK, Yan J, Li G, Li X. Integrated 3D genome, epigenome and transcriptome analyses reveal transcriptional coordination of circadian rhythm in rice. Nucleic Acids Res 2023; 51:9001-9018. [PMID: 37572350 PMCID: PMC10516653 DOI: 10.1093/nar/gkad658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 07/11/2023] [Accepted: 08/01/2023] [Indexed: 08/14/2023] Open
Abstract
Photoperiods integrate with the circadian clock to coordinate gene expression rhythms and thus ensure plant fitness to the environment. Genome-wide characterization and comparison of rhythmic genes under different light conditions revealed delayed phase under constant darkness (DD) and reduced amplitude under constant light (LL) in rice. Interestingly, ChIP-seq and RNA-seq profiling of rhythmic genes exhibit synchronous circadian oscillation in H3K9ac modifications at their loci and long non-coding RNAs (lncRNAs) expression at proximal loci. To investigate how gene expression rhythm is regulated in rice, we profiled the open chromatin regions and transcription factor (TF) footprints by time-series ATAC-seq. Although open chromatin regions did not show circadian change, a significant number of TFs were identified to rhythmically associate with chromatin and drive gene expression in a time-dependent manner. Further transcriptional regulatory networks mapping uncovered significant correlation between core clock genes and transcription factors involved in light/temperature signaling. In situ Hi-C of ZT8-specific expressed genes displayed highly connected chromatin association at the same time, whereas this ZT8 chromatin connection network dissociates at ZT20, suggesting the circadian control of gene expression by dynamic spatial chromatin conformation. These findings together implicate the existence of a synchronization mechanism between circadian H3K9ac modifications, chromatin association of TF and gene expression, and provides insights into circadian dynamics of spatial chromatin conformation that associate with gene expression rhythms.
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Affiliation(s)
- Ying Zhang
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Guoting Chen
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
- Laboratory of Agricultural Bioinformatics, Hubei Engineering Technology Research Center of Agricultural Big Data, College of Informatics, Huazhong Agricultural University, Wuhan, China
| | - Li Deng
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Baibai Gao
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Jing Yang
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Cheng Ding
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Qing Zhang
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Weizhi Ouyang
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Minrong Guo
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Wenxia Wang
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Beibei Liu
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Qinghua Zhang
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Wing-Kin Sung
- Department of Chemical Pathology, Chinese University of Hong Kong, Hong Kong, China
| | - Jiapei Yan
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Guoliang Li
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
- Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Wuhan, China
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
- Laboratory of Agricultural Bioinformatics, Hubei Engineering Technology Research Center of Agricultural Big Data, College of Informatics, Huazhong Agricultural University, Wuhan, China
| | - Xingwang Li
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
- Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Wuhan, China
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
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18
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Li Z, Gao F, Liu Y, Abou-Elwafa SF, Qi J, Pan H, Hu X, Ren Z, Zeng H, Liu Z, Zhang D, Xi Z, Liu T, Chen Y, Su H, Xiong S, Ku L. ZmGI2 regulates flowering time through multiple flower development pathways in maize. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 332:111701. [PMID: 37030327 DOI: 10.1016/j.plantsci.2023.111701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 04/02/2023] [Accepted: 04/05/2023] [Indexed: 05/27/2023]
Abstract
GIGANTEA (GI) encodes a component of the circadian clock core oscillator and has been identified as a regulatory pathway of the circadian rhythm and photoperiodic flowering in model plants. However, the regulatory pathway of GI affecting flowering time is unknown in maize. Here, we identified that the zmgi2 mutant flowered earlier than the wild type under long day (LD) conditions, whereas the difference in flowering time was not apparent under short day (SD) conditions. The 24 h optimal expression of the gene in the stem apex meristems (SAM) appeared at 9 h after dawn under LD conditions and at 11 h after dawn under SD conditions. DAP-Seq and RNA-Seq further revealed that ZmGI2 delays flowering by directly binding to the upstream regions of ZmVOZs, ZmZCN8 and ZmFPF1 to repress the expression of these genes and by directly binding to the upstream regions of ZmARR11, ZmDOF and ZmUBC11 to promote the expression of these genes. The genetic and biochemical evidence suggests a model for the potential role of ZmGI2 in regulating the flowering time-dependent photoperiodic pathway. This study provides novel insights into the function of ZmGIs in maize and further demonstrates their potential importance for floral transition. These results contribute to a comprehensive understanding of the molecular mechanisms and regulatory networks of GI transcription factors in regulating flowering time in maize.
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Affiliation(s)
- Zhimin Li
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Fengran Gao
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Yajing Liu
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | | | - Junlong Qi
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Haibo Pan
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Xiaomeng Hu
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Zhenzhen Ren
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Haixia Zeng
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Zhixue Liu
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Dongling Zhang
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Zhangying Xi
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Tianxue Liu
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Yanhui Chen
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China
| | - Huihui Su
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China.
| | - Shuping Xiong
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China.
| | - Lixia Ku
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science and Key Laboratory of Regulating and Controlling Crop Growth and Development Ministry of Education, Henan Agricultural University, No. 15 Longzihu University Park, Zhengdong New Area, Zhengzhou, Henan 450046, China.
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Pavani G, Malhotra PK, Verma SK. Flowering in sugarcane-insights from the grasses. 3 Biotech 2023; 13:154. [PMID: 37138783 PMCID: PMC10149435 DOI: 10.1007/s13205-023-03573-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 04/19/2023] [Indexed: 05/05/2023] Open
Abstract
Flowering is a crucial phase for angiosperms to continue their species propagation and is highly regulated. In the current review, flowering in sugarcane and the associated mechanisms are elaborately presented. In sugarcane, flowering has two effects, wherein it is a beneficial factor from the breeder's perspective and crucial for crop improvement, but commercially, it depletes the sucrose reserves from the stalks; hence, less value is assigned. Different species of Saccharum genus are spread across geographical latitudes, thereby proving their ability to grow in multiple inductive daylengths of different locations according in the habituated zone. In general, sugarcane is termed an intermediate daylength plant with quantitative short-day behaviour as it requires reduction in daylength from 12 h 55 min to 12 h or 12 h 30 min. The prime concern in sugarcane flowering is its erratic flowering nature. The transition to reproductive stage which reverts to vegetative stage if there is any deviation from ambient temperature and light is also an issue. Spatial and temporal gene expression patterns during vegetative to reproductive stage transition and after reverting to vegetative state could possibly reveal how the genetic circuits are being governed. This review will also shed a light on potential roles of genes and/or miRNAs in flowering in sugarcane. Knowledge of transcriptomic background of circadian, photoperiod, and gibberellin pathways in sugarcane will enable us to better understand of variable response in floral development.
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Affiliation(s)
- Gongati Pavani
- School of Agricultural Biotechnology, Punjab Agricultural University, Ludhiana, 141004 India
| | - Pawan Kumar Malhotra
- School of Agricultural Biotechnology, Punjab Agricultural University, Ludhiana, 141004 India
| | - Sandeep Kumar Verma
- Institute of Biological Science, SAGE University, Bypass Road, Kailod Kartal, Indore, Madhya Pradesh 452020 India
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20
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Sorkin ML, Tzeng SC, King S, Romanowski A, Kahle N, Bindbeutel R, Hiltbrunner A, Yanovsky MJ, Evans BS, Nusinow DA. COLD REGULATED GENE 27 and 28 Antagonize the Transcriptional Activity of the RVE8/LNK1/LNK2 Circadian Complex. PLANT PHYSIOLOGY 2023:kiad210. [PMID: 37017001 DOI: 10.1093/plphys/kiad210] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 03/01/2023] [Accepted: 04/04/2023] [Indexed: 06/19/2023]
Abstract
Many molecular and physiological processes in plants occur at a specific time of day. These daily rhythms are coordinated in part by the circadian clock, a timekeeper that uses daylength and temperature to maintain rhythms of approximately 24 hours in various clock-regulated phenotypes. The circadian MYB-like transcription factor REVEILLE 8 (RVE8) interacts with its transcriptional coactivators NIGHT LIGHT INDUCIBLE AND CLOCK REGULATED 1 (LNK1) and LNK2 to promote the expression of evening-phased clock genes and cold tolerance factors. While genetic approaches have commonly been used to discover connections within the clock and between clock elements and other pathways, here we used affinity purification coupled with mass spectrometry to identify time-of-day-specific protein interactors of the RVE8-LNK1/LNK2 complex in Arabidopsis (Arabidopsis thaliana). Among the interactors of RVE8/LNK1/LNK2 were COLD REGULATED GENE 27 (COR27) and COR28, which coprecipitated in an evening-specific manner. In addition to COR27 and COR28, we found an enrichment of temperature-related interactors that led us to establish a previously uncharacterized role for LNK1 and LNK2 in temperature entrainment of the clock. We established that RVE8, LNK1, and either COR27 or COR28 form a tripartite complex in yeast (Saccharomyces cerevisiae) and that the effect of this interaction in planta serves to antagonize transcriptional activation of RVE8 target genes, potentially through mediating RVE8 protein degradation in the evening. Together, these results illustrate how a proteomic approach can be used to identify time-of-day-specific protein interactions. Discovery of the RVE8-LNK-COR protein complex indicates a previously unknown regulatory mechanism for circadian and temperature signaling pathways.
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Affiliation(s)
- Maria L Sorkin
- Donald Danforth Plant Science Center, St. Louis, MO, USA
- Division of Biology and Biomedical Sciences, Washington University in St. Louis, St. Louis, MO, USA
| | | | - Stefanie King
- Donald Danforth Plant Science Center, St. Louis, MO, USA
- Division of Biology and Biomedical Sciences, Washington University in St. Louis, St. Louis, MO, USA
| | - Andrés Romanowski
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Nikolai Kahle
- Institute of Biology II, Faculty of Biology, University of Freiburg, Freiburg, Germany
| | | | - Andreas Hiltbrunner
- Institute of Biology II, Faculty of Biology, University of Freiburg, Freiburg, Germany
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Marcelo J Yanovsky
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
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21
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Dai X, Zhang Y, Xu X, Ran M, Zhang J, Deng K, Ji G, Xiao L, Zhou X. Transcriptome and functional analysis revealed the intervention of brassinosteroid in regulation of cold induced early flowering in tobacco. FRONTIERS IN PLANT SCIENCE 2023; 14:1136884. [PMID: 37063233 PMCID: PMC10102362 DOI: 10.3389/fpls.2023.1136884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 03/15/2023] [Indexed: 06/19/2023]
Abstract
Cold environmental conditions may often lead to the early flowering of plants, and the mechanism by cold-induced flowering remains poorly understood. Microscopy analysis in this study demonstrated that cold conditioning led to early flower bud differentiation in two tobacco strains and an Agilent Tobacco Gene Expression microarray was adapted for transcriptomic analysis on the stem tips of cold treated tobacco to gain insight into the molecular process underlying flowering in tobacco. The transcriptomic analysis showed that cold treatment of two flue-cured tobacco varieties (Xingyan 1 and YunYan 85) yielded 4176 and 5773 genes that were differentially expressed, respectively, with 2623 being commonly detected. Functional distribution revealed that the differentially expressed genes (DEGs) were mainly enriched in protein metabolism, RNA, stress, transport, and secondary metabolism. Genes involved in secondary metabolism, cell wall, and redox were nearly all up-regulated in response to the cold conditioning. Further analysis demonstrated that the central genes related to brassinosteroid biosynthetic pathway, circadian system, and flowering pathway were significantly enhanced in the cold treated tobacco. Phytochemical measurement and qRT-PCR revealed an increased accumulation of brassinolide and a decreased expression of the flowering locus c gene. Furthermore, we found that overexpression of NtBRI1 could induce early flowering in tobacco under normal condition. And low-temperature-induced early flowering in NtBRI1 overexpression plants were similar to that of normal condition. Consistently, low-temperature-induced early flowering is partially suppressed in NtBRI1 mutant. Together, the results suggest that cold could induce early flowering of tobacco by activating brassinosteroid signaling.
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Affiliation(s)
- Xiumei Dai
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
- Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing, China
| | - Yan Zhang
- Chongqing Tobacco Science Research Institute, Chongqing, China
| | - Xiaohong Xu
- Chongqing Tobacco Science Research Institute, Chongqing, China
| | - Mao Ran
- Chongqing Tobacco Science Research Institute, Chongqing, China
| | - Jiankui Zhang
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
- Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing, China
| | - Kexuan Deng
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
- Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing, China
| | - Guangxin Ji
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
- Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing, China
| | - Lizeng Xiao
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
- Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing, China
| | - Xue Zhou
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
- Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing, China
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22
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Uemoto K, Mori F, Yamauchi S, Kubota A, Takahashi N, Egashira H, Kunimoto Y, Araki T, Takemiya A, Ito H, Endo M. Root PRR7 Improves the Accuracy of the Shoot Circadian Clock through Nutrient Transport. PLANT & CELL PHYSIOLOGY 2023; 64:352-362. [PMID: 36631969 PMCID: PMC10016326 DOI: 10.1093/pcp/pcad003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/30/2022] [Accepted: 01/06/2023] [Indexed: 06/17/2023]
Abstract
The circadian clock allows plants to anticipate and adapt to periodic environmental changes. Organ- and tissue-specific properties of the circadian clock and shoot-to-root circadian signaling have been reported. While this long-distance signaling is thought to coordinate physiological functions across tissues, little is known about the feedback regulation of the root clock on the shoot clock in the hierarchical circadian network. Here, we show that the plant circadian clock conveys circadian information between shoots and roots through sucrose and K+. We also demonstrate that K+ transport from roots suppresses the variance of period length in shoots and then improves the accuracy of the shoot circadian clock. Sucrose measurements and qPCR showed that root sucrose accumulation was regulated by the circadian clock. Furthermore, root circadian clock genes, including PSEUDO-RESPONSE REGULATOR7 (PRR7), were regulated by sucrose, suggesting the involvement of sucrose from the shoot in the regulation of root clock gene expression. Therefore, we performed time-series measurements of xylem sap and micrografting experiments using prr7 mutants and showed that root PRR7 regulates K+ transport and suppresses variance of period length in the shoot. Our modeling analysis supports the idea that root-to-shoot signaling contributes to the precision of the shoot circadian clock. We performed micrografting experiments that illustrated how root PRR7 plays key roles in maintaining the accuracy of shoot circadian rhythms. We thus present a novel directional signaling pathway for circadian information from roots to shoots and propose that plants modulate physiological events in a timely manner through various timekeeping mechanisms.
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Affiliation(s)
- Kyohei Uemoto
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Yoshida-Konoecho, Sakyo-ku, Kyoto, 606-8501 Japan
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama-Cho, Ikoma, Nara, 630-0192 Japan
| | - Fumito Mori
- Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minami-ku, Fukuoka, 815-8540 Japan
| | - Shota Yamauchi
- Department of Biology, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, 753-8512 Japan
| | - Akane Kubota
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama-Cho, Ikoma, Nara, 630-0192 Japan
| | - Nozomu Takahashi
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama-Cho, Ikoma, Nara, 630-0192 Japan
| | - Haruki Egashira
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama-Cho, Ikoma, Nara, 630-0192 Japan
| | - Yumi Kunimoto
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama-Cho, Ikoma, Nara, 630-0192 Japan
| | - Takashi Araki
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Yoshida-Konoecho, Sakyo-ku, Kyoto, 606-8501 Japan
| | - Atsushi Takemiya
- Department of Biology, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, 753-8512 Japan
| | - Hiroshi Ito
- Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minami-ku, Fukuoka, 815-8540 Japan
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23
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Chuong NN, Doan PPT, Wang L, Kim JH, Kim J. Current Insights into m 6A RNA Methylation and Its Emerging Role in Plant Circadian Clock. PLANTS (BASEL, SWITZERLAND) 2023; 12:624. [PMID: 36771711 PMCID: PMC9920239 DOI: 10.3390/plants12030624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 01/24/2023] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
N6-adenosine methylation (m6A) is a prevalent form of RNA modification found in the expressed transcripts of many eukaryotic organisms. Moreover, m6A methylation is a dynamic and reversible process that requires the functioning of various proteins and their complexes that are evolutionarily conserved between species and include methylases, demethylases, and m6A-binding proteins. Over the past decade, the m6A methylation process in plants has been extensively studied and the understanding thereof has drastically increased, although the regulatory function of some components relies on information derived from animal systems. Notably, m6A has been found to be involved in a variety of factors in RNA processing, such as RNA stability, alternative polyadenylation, and miRNA regulation. The circadian clock in plants is a molecular timekeeping system that regulates the daily and rhythmic activity of many cellular and physiological processes in response to environmental changes such as the day-night cycle. The circadian clock regulates the rhythmic expression of genes through post-transcriptional regulation of mRNA. Recently, m6A methylation has emerged as an additional layer of post-transcriptional regulation that is necessary for the proper functioning of the plant circadian clock. In this review, we have compiled and summarized recent insights into the molecular mechanisms behind m6A modification and its various roles in the regulation of RNA. We discuss the potential role of m6A modification in regulating the plant circadian clock and outline potential future directions for the study of mRNA methylation in plants. A deeper understanding of the mechanism of m6A RNA regulation and its role in plant circadian clocks will contribute to a greater understanding of the plant circadian clock.
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Affiliation(s)
- Nguyen Nguyen Chuong
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, Jeju 690756, Republic of Korea
| | - Phan Phuong Thao Doan
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, Jeju 690756, Republic of Korea
| | - Lanshuo Wang
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, Jeju 690756, Republic of Korea
| | - Jin Hee Kim
- Subtropical Horticulture Research Institute, Jeju National University, Jeju 690756, Republic of Korea
| | - Jeongsik Kim
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, Jeju 690756, Republic of Korea
- Subtropical Horticulture Research Institute, Jeju National University, Jeju 690756, Republic of Korea
- Faculty of Science Education, Jeju National University, Jeju 690756, Republic of Korea
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24
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Jiang L, Fan T, Wang L, Zhang L, Xu J. Divergence of flowering-related genes to control flowering in five Euphorbiaceae genomes. FRONTIERS IN PLANT SCIENCE 2022; 13:1015114. [PMID: 36340397 PMCID: PMC9627276 DOI: 10.3389/fpls.2022.1015114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Reproductive growth and vegetative growth are a pair of main contradictions in the process of plant growth. Flowering, as part of reproductive growth, is a key switch in the life cycle of higher plants, which affects the yield and economic benefits of plants to a certain extent. The Euphorbiaceae species, including castor bean (Ricinus communis), physic nut (Jatropha curcas), tung tree (Vernicia fordii), cassava (Manihot esculenta), and rubber tree (Hevea brasiliensis), have important economic values because they are raw materials for the production of biodiesel, rubber, etc. The flowering mechanisms are still excluded in the Euphorbiaceae species. The flowering-related genes of Arabidopsis thaliana (Arabidopsis) were used as a reference to determine the orthologs of these genes in Euphorbiaceae genomes. The result showed that 146, 144, 114, 114, and 149 of 207 A. thaliana genes were respectively matched to R. communis, V. fordii, J. curcas, H. brasiliensis, and M. esculenta. These identified genes were clustered into seven pathways including gibberellins, floral meristem identity (FMI), vernalization, photoperiod, floral pathway integrators (FPIs), and autonomous pathways. Then, some key numbers of flowering-related genes are widely conserved in the Euphorbiaceae genomes including but not limited to FPI genes LFY, SOC1, FT, and FMI genes AG, CAL, and FUL. However, some genes, including FRI, FLC, and GO, were missing in several or all five Euphorbiaceae species. In this study, we proposed the putative mechanisms of flowering-related genes to control flowering and provided new candidate flowering genes for using marker-assisted breeding to improve variety quality.
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Affiliation(s)
- Lan Jiang
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Yijishan Hospital of Wannan Medical College, Wuhu, China
- Anhui Provincial Clinical Research Center for Critical Respiratory Disease, Wuhu, China
| | - Tingting Fan
- Forestry College, Central South University of Forestry and Technology, Changsha, China
| | - Lihu Wang
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China
| | - Lin Zhang
- College of Basic Medical Sciences, Hubei University of Chinese Medicine, Wuhan, China
| | - Jun Xu
- Hunan Institute of Microbiology, Changsha, China
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25
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Gururaj M, Ohmura A, Ozawa M, Yamano T, Fukuzawa H, Matsuo T. A potential EARLY FLOWERING 3 homolog in Chlamydomonas is involved in the red/violet and blue light signaling pathways for the degradation of RHYTHM OF CHLOROPLAST 15. PLoS Genet 2022; 18:e1010449. [PMID: 36251728 PMCID: PMC9612821 DOI: 10.1371/journal.pgen.1010449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 10/27/2022] [Accepted: 09/26/2022] [Indexed: 11/07/2022] Open
Abstract
Light plays a major role in resetting the circadian clock, allowing the organism to synchronize with the environmental day and night cycle. In Chlamydomonas the light-induced degradation of the circadian clock protein, RHYTHM OF CHLOROPLAST 15 (ROC15), is considered one of the key events in resetting the circadian clock. Red/violet and blue light signals have been shown to reach the clock via different molecular pathways; however, many of the participating components of these pathways are yet to be elucidated. Here, we used a forward genetics approach using a reporter strain that expresses a ROC15-luciferase fusion protein. We isolated a mutant that showed impaired ROC15 degradation in response to a wide range of visible wavelengths and impaired light-induced phosphorylation of ROC15. These results suggest that the effects of different wavelengths converge before acting on ROC15 or at ROC15 phosphorylation. Furthermore, the mutant showed a weakened phase resetting in response to light, but its circadian rhythmicity remained largely unaffected under constant light and constant dark conditions. Surprisingly, the gene disrupted in this mutant was found to encode a protein that possessed a very weak similarity to the Arabidopsis thaliana EARLY FLOWERING 3 (ELF3). Our results suggest that this protein is involved in the many different light signaling pathways to the Chlamydomonas circadian clock. However, it may not influence the transcriptional oscillator of Chlamydomonas to a great extent. This study provides an opportunity to further understand the mechanisms underlying light-induced clock resetting and explore the evolution of the circadian clock architecture in Viridiplantae. Resetting of the circadian clock is crucial for an organism, as it allows the synchronization of its internal processes with the day/night cycle. Environmental signals—such as light and temperature—contribute to this event. In plants, the molecular mechanisms underlying the light-induced resetting of the circadian clock have been well-studied in the streptophyte, Arabidopsis thaliana, and has been explored in some chlorophyte algae such as Ostreococcus tauri and Chlamydomonas reinhardtii. Here, we used a forward genetics approach to examine the light signaling pathway of a process considered critical for the light resetting of the Chlamydomonas clock—light-induced degradation of the circadian clock protein ROC15. We explored various aspects of the isolated mutant, such as the degradation of ROC15 in response to a range of visible wavelengths, the circadian rhythm, and the phase resetting of the rhythm. We show that the effects of different wavelengths of light converge before acting on ROC15 or at ROC15 phosphorylation with the aid of a potential homolog of the Arabidopsis thaliana ELF3. Our findings contradict the existing view that there is no known homolog of ELF3 in chlorophyte algae. This study, therefore, sheds light on the evolutionary aspects of the Viridiplantae circadian clocks and their light resetting.
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Affiliation(s)
- Malavika Gururaj
- Center for Gene Research, Nagoya University, Nagoya, Japan
- Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Ayumi Ohmura
- Center for Gene Research, Nagoya University, Nagoya, Japan
| | - Mariko Ozawa
- Center for Gene Research, Nagoya University, Nagoya, Japan
| | - Takashi Yamano
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Hideya Fukuzawa
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Takuya Matsuo
- Center for Gene Research, Nagoya University, Nagoya, Japan
- Graduate School of Science, Nagoya University, Nagoya, Japan
- * E-mail:
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26
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He Y, Yu Y, Wang X, Qin Y, Su C, Wang L. Aschoff's rule on circadian rhythms orchestrated by blue light sensor CRY2 and clock component PRR9. Nat Commun 2022; 13:5869. [PMID: 36198686 PMCID: PMC9535003 DOI: 10.1038/s41467-022-33568-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 09/22/2022] [Indexed: 11/09/2022] Open
Abstract
Circadian pace is modulated by light intensity, known as the Aschoff’s rule, with largely unrevealed mechanisms. Here we report that photoreceptor CRY2 mediates blue light input to the circadian clock by directly interacting with clock core component PRR9 in blue light dependent manner. This physical interaction dually blocks the accessibility of PRR9 protein to its co-repressor TPL/TPRs and the resulting kinase PPKs. Notably, phosphorylation of PRR9 by PPKs is critical for its DNA binding and repressive activity, hence to ensure proper circadian speed. Given the labile nature of CRY2 in strong blue light, our findings provide a mechanistic explanation for Aschoff’s rule in plants, i.e., blue light triggers CRY2 turnover in proportional to its intensity, which accordingly releasing PRR9 to fine tune circadian speed. Our findings not only reveal a network mediating light input into the circadian clock, but also unmask a mechanism by which the Arabidopsis circadian clock senses light intensity. Circadian pace is modulated by light intensity. Here the authors show that CRY2 interacts with PRR9 to mediate blue light input to the circadian clock and is degraded at higher light intensity offering a mechanistic explanation as to how intensity can modify clock place.
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Affiliation(s)
- Yuqing He
- Key laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yingjun Yu
- Key laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiling Wang
- Key laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yumei Qin
- Key laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chen Su
- Key laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lei Wang
- Key laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China.
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27
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Michael TP. Core circadian clock and light signaling genes brought into genetic linkage across the green lineage. PLANT PHYSIOLOGY 2022; 190:1037-1056. [PMID: 35674369 PMCID: PMC9516744 DOI: 10.1093/plphys/kiac276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
The circadian clock is conserved at both the level of transcriptional networks as well as core genes in plants, ensuring that biological processes are phased to the correct time of day. In the model plant Arabidopsis (Arabidopsis thaliana), the core circadian SHAQKYF-type-MYB (sMYB) genes CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) and REVEILLE (RVE4) show genetic linkage with PSEUDO-RESPONSE REGULATOR 9 (PRR9) and PRR7, respectively. Leveraging chromosome-resolved plant genomes and syntenic ortholog analysis enabled tracing this genetic linkage back to Amborella trichopoda, a sister lineage to the angiosperm, and identifying an additional evolutionarily conserved genetic linkage in light signaling genes. The LHY/CCA1-PRR5/9, RVE4/8-PRR3/7, and PIF3-PHYA genetic linkages emerged in the bryophyte lineage and progressively moved within several genes of each other across an array of angiosperm families representing distinct whole-genome duplication and fractionation events. Soybean (Glycine max) maintained all but two genetic linkages, and expression analysis revealed the PIF3-PHYA linkage overlapping with the E4 maturity group locus was the only pair to robustly cycle with an evening phase, in contrast to the sMYB-PRR morning and midday phase. While most monocots maintain the genetic linkages, they have been lost in the economically important grasses (Poaceae), such as maize (Zea mays), where the genes have been fractionated to separate chromosomes and presence/absence variation results in the segregation of PRR7 paralogs across heterotic groups. The environmental robustness model is put forward, suggesting that evolutionarily conserved genetic linkages ensure superior microhabitat pollinator synchrony, while wide-hybrids or unlinking the genes, as seen in the grasses, result in heterosis, adaptation, and colonization of new ecological niches.
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Affiliation(s)
- Todd P Michael
- The Plant Molecular and Cellular Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, California 92037, USA
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28
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Maeda AE, Nakamichi N. Plant clock modifications for adapting flowering time to local environments. PLANT PHYSIOLOGY 2022; 190:952-967. [PMID: 35266545 PMCID: PMC9516756 DOI: 10.1093/plphys/kiac107] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 02/09/2022] [Indexed: 05/25/2023]
Abstract
During and after the domestication of crops from ancestral wild plants, humans selected cultivars that could change their flowering time in response to seasonal daylength. Continuous selection of this trait eventually allowed the introduction of crops into higher or lower latitudes and different climates from the original regions where domestication initiated. In the past two decades, numerous studies have found the causal genes or alleles that change flowering time and have assisted in adapting crop species such as barley (Hordeum vulgare), wheat (Triticum aestivum L.), rice (Oryza sativa L.), pea (Pisum sativum L.), maize (Zea mays spp. mays), and soybean (Glycine max (L.) Merr.) to new environments. This updated review summarizes the genes or alleles that contributed to crop adaptation in different climatic areas. Many of these genes are putative orthologs of Arabidopsis (Arabidopsis thaliana) core clock genes. We also discuss how knowledge of the clock's molecular functioning can facilitate molecular breeding in the future.
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Affiliation(s)
- Akari E Maeda
- Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Norihito Nakamichi
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
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29
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Wang S, Steed G, Webb AAR. Circadian entrainment in Arabidopsis. PLANT PHYSIOLOGY 2022; 190:981-993. [PMID: 35512209 PMCID: PMC9516740 DOI: 10.1093/plphys/kiac204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 03/29/2022] [Indexed: 06/14/2023]
Abstract
Circadian clocks coordinate physiology and development as an adaption to the oscillating day/night cycle caused by the rotation of Earth on its axis and the changing length of day and night away from the equator caused by orbiting the sun. Circadian clocks confer advantages by entraining to rhythmic environmental cycles to ensure that internal events within the plant occur at the correct time with respect to the cyclic external environment. Advances in determining the structure of circadian oscillators and the pathways that allow them to respond to light, temperature, and metabolic signals have begun to provide a mechanistic insight to the process of entrainment in Arabidopsis (Arabidopsis thaliana). We describe the concepts of entrainment and how it occurs. It is likely that a thorough mechanistic understanding of the genetic and physiological basis of circadian entrainment will provide opportunities for crop improvement.
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Affiliation(s)
- Shouming Wang
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK
- School of Life Science and Technology, Hubei Engineering University, Xiaogan 432000, China
| | - Gareth Steed
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK
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30
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Okada M, Yang Z, Mas P. Circadian autonomy and rhythmic precision of the Arabidopsis female reproductive organ. Dev Cell 2022; 57:2168-2180.e4. [PMID: 36115345 DOI: 10.1016/j.devcel.2022.08.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 07/12/2022] [Accepted: 08/26/2022] [Indexed: 11/03/2022]
Abstract
The plant circadian clock regulates essential biological processes including flowering time or petal movement. However, little is known about how the clock functions in flowers. Here, we identified the circadian components and transcriptional networks contributing to the generation of rhythms in pistils, the female reproductive organ. When detached from the rest of the flower, pistils sustain highly precise rhythms, indicating organ-specific circadian autonomy. Analyses of clock mutants and chromatin immunoprecipitation assays showed distinct expression patterns and specific regulatory functions for clock activators and repressors in pistils. Genetic interaction studies also suggested a hierarchy of the repressing activities that provide robustness and precision to the pistil clock. Globally, the circadian function in pistils primarily governs responses to environmental stimuli and photosynthesis and controls pistil growth and seed weight and production. Understanding the circadian intricacies in reproductive organs may prove useful for optimizing plant reproduction and productivity.
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Affiliation(s)
- Masaaki Okada
- Centre for Research in Agricultural Genomics (CRAG), CSIC, IRTA-UAB-UB, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Zhiyuan Yang
- Centre for Research in Agricultural Genomics (CRAG), CSIC, IRTA-UAB-UB, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Paloma Mas
- Centre for Research in Agricultural Genomics (CRAG), CSIC, IRTA-UAB-UB, Campus UAB, Bellaterra, 08193 Barcelona, Spain; Consejo Superior de Investigaciones Científicas (CSIC), 08028 Barcelona, Spain.
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31
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Hotta CT. The evolution and function of the PSEUDO RESPONSE REGULATOR gene family in the plant circadian clock. Genet Mol Biol 2022; 45:e20220137. [PMID: 36125163 PMCID: PMC9486492 DOI: 10.1590/1678-4685-gmb-2022-0137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 07/12/2022] [Indexed: 11/22/2022] Open
Abstract
PSEUDO-RESPONSE PROTEINS (PRRs) are a gene
family vital for the generation of rhythms by the circadian clock. Plants have
circadian clocks, or circadian oscillators, to adapt to a rhythmic environment.
The circadian clock system can be divided into three parts: the core oscillator,
the input pathways, and the output pathways. The PRRs have a role in all three
parts. These nuclear proteins have an N-terminal pseudo receiver domain and a
C-terminal CONSTANS, CONSTANS-LIKE, and TOC1 (CCT) domain. The PRRs can be
identified from green algae to monocots, ranging from one to >5 genes per
species. Arabidopsis thaliana, for example, has five genes:
PRR9, PRR7, PRR5,
PRR3 and TOC1/PRR1. The
PRR genes can be divided into three clades using protein
homology: TOC1/PRR1, PRR7/3, and PRR9/5 expanded independently in eudicots and
monocots. The PRRs can make protein complexes and bind to DNA, and the wide
variety of protein-protein interactions are essential for the multiple roles in
the circadian clock. In this review, the history of PRR research is briefly
recapitulated, and the diversity of PRR genes in green and recent works about
their role in the circadian clock are discussed.
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Affiliation(s)
- Carlos Takeshi Hotta
- Universidade de São Paulo, Instituto de Química, Departamento de Bioquímica, São Paulo, SP, Brazil
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32
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Lee SJ, Kang K, Lim JH, Paek NC. Natural alleles of CIRCADIAN CLOCK ASSOCIATED1 contribute to rice cultivation by fine-tuning flowering time. PLANT PHYSIOLOGY 2022; 190:640-656. [PMID: 35723564 PMCID: PMC9434239 DOI: 10.1093/plphys/kiac296] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 05/26/2022] [Indexed: 05/11/2023]
Abstract
The timing of flowering is a crucial factor for successful grain production at a wide range of latitudes. Domestication of rice (Oryza sativa) included selection for natural alleles of flowering-time genes that allow rice plants to adapt to broad geographic areas. Here, we describe the role of natural alleles of CIRCADIAN CLOCK ASSOCIATED1 (OsCCA1) in cultivated rice based on analysis of single-nucleotide polymorphisms deposited in the International Rice Genebank Collection Information System database. Rice varieties harboring japonica-type OsCCA1 alleles (OsCCA1a haplotype) flowered earlier than those harboring indica-type OsCCA1 alleles (OsCCA1d haplotype). In the japonica cultivar "Dongjin", a T-DNA insertion in OsCCA1a resulted in late flowering under long-day and short-day conditions, indicating that OsCCA1 is a floral inducer. Reverse transcription quantitative PCR analysis showed that the loss of OsCCA1a function induces the expression of the floral repressors PSEUDO-RESPONSE REGULATOR 37 (OsPRR37) and Days to Heading 8 (DTH8), followed by repression of the Early heading date 1 (Ehd1)-Heading date 3a (Hd3a)-RICE FLOWERING LOCUS T 1 (RFT1) pathway. Binding affinity assays indicated that OsCCA1 binds to the promoter regions of OsPRR37 and DTH8. Naturally occurring OsCCA1 alleles are evolutionarily conserved in cultivated rice (O. sativa). Oryza rufipogon-I (Or-I) and Or-III type accessions, representing the ancestors of O. sativa indica and japonica, harbored indica- and japonica-type OsCCA1 alleles, respectively. Taken together, our results demonstrate that OsCCA1 is a likely domestication locus that has contributed to the geographic adaptation and expansion of cultivated rice.
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Affiliation(s)
- Sang-Ji Lee
- Department of Agriculture, Forestry and Bioresources, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, South Korea
| | - Kiyoon Kang
- Division of Life Sciences, Incheon National University, Incheon 22012, South Korea
| | - Jung-Hyun Lim
- Department of Agriculture, Forestry and Bioresources, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, South Korea
| | - Nam-Chon Paek
- Department of Agriculture, Forestry and Bioresources, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, South Korea
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33
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Niraula PM, McNeece BT, Sharma K, Alkharouf NW, Lawrence KS, Klink VP. The central circadian regulator CCA1 functions in Glycine max during defense to a root pathogen, regulating the expression of genes acting in effector triggered immunity (ETI) and cell wall metabolism. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 185:198-220. [PMID: 35704989 DOI: 10.1016/j.plaphy.2022.05.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 05/17/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
Expression of the central circadian oscillator components CIRCADIAN CLOCK ASSOCIATED 1 (CCA1), TIMING OF CAB1 (TOC1), GIGANTEA (GI), and CONSTANS (CO) occurs in Glycine max root cells (syncytia) parasitized by the nematode Heterodera glycines while undergoing resistance, indicating a defense role. GmCCA1-1 relative transcript abundance (RTA) in roots experiencing overexpression (OE) or RNA interference (RNAi) is characterized by rhythmic oscillations, compared to a ribosomal protein gene (GmRPS21) control. A GmCCA1-1 RTA change, advancing by 12 h, exists in H. glycines-infected as compared to uninfected controls in wild-type, H. glycines-resistant, G. max[Peking/PI 548402]. The G. max[Peking/PI 548402] transgenic controls exhibit the RTA change by 4 h post infection (hpi), not consistently occurring in the H. glycines-susceptible G. max[Williams 82/PI 518671] until 56 hpi. GmCCA1-1 expression is observed to be reduced in H. glycines-infected GmCCA1-1-OE roots as compared to non-infected transgenic roots with no significant change observed among RNAi roots. The GmCCA1-1 expression in transgenic GmCCA1-1-OE roots remains higher than control and RNAi roots. Decreased GmCCA1-1 mRNA among infected roots shows the altered expression is targeted by H. glycines. Gene expression of proven defense genes including 9 different mitogen activated protein kinases (GmMAPKs), NON-RACE SPECIFIC DISEASE RESISTANCE 1 (GmNDR1-1), RPM1-INTERACTING PROTEIN 4 (GmRIN4-4), and the secreted xyloglucan endotransglycosylase/hydrolase 43 (GmXTH43) in GmCCA1-1-OE and GmCCA1-1-RNAi roots, compared to controls, reveal a significant role of GmCCA1-1 expression in roots undergoing defense to H. glycines parasitism. The observation that GmCCA1-1 regulates GmXTH43 expression links the central circadian oscillator to the functionality of the secretion system.
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Affiliation(s)
- Prakash M Niraula
- Department of Biological Sciences, Mississippi State University, Mississippi State, MS, 39762, USA.
| | - Brant T McNeece
- Department of Biological Sciences, Mississippi State University, Mississippi State, MS, 39762, USA.
| | - Keshav Sharma
- Department of Biological Sciences, Mississippi State University, Mississippi State, MS, 39762, USA.
| | - Nadim W Alkharouf
- Department of Computer and Information Sciences, Towson University, Towson, MD, 21252, USA.
| | - Katherine S Lawrence
- Department of Entomology and Plant Pathology, Auburn University, 209 Life Science Building, Auburn, AL, 36849, USA.
| | - Vincent P Klink
- Department of Biological Sciences, Mississippi State University, Mississippi State, MS, 39762, USA; USDA-ARS-NEA-BARC Molecular Plant Pathology Laboratory Building 004, Room 122, BARC-West, 10300 Baltimore Ave., Beltsville, MD, 20705, USA; Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University, Mississippi State, MS, 39762, USA; Center for Computational Sciences High Performance Computing Collaboratory, Mississippi State University, Mississippi State, MS, 39762, USA.
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Alexandre Moraes T, Mengin V, Peixoto B, Encke B, Krohn N, Höhne M, Krause U, Stitt M. The circadian clock mutant lhy cca1 elf3 paces starch mobilization to dawn despite severely disrupted circadian clock function. PLANT PHYSIOLOGY 2022; 189:2332-2356. [PMID: 35567528 PMCID: PMC9348821 DOI: 10.1093/plphys/kiac226] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 04/22/2022] [Indexed: 06/15/2023]
Abstract
Many plants, including Arabidopsis (Arabidopsis thaliana), accumulate starch in the daytime and remobilize it to support maintenance and growth at night. Starch accumulation is increased when carbon is in short supply, for example, in short photoperiods. Mobilization is paced to exhaust starch around dawn, as anticipated by the circadian clock. This diel pattern of turnover is largely robust against loss of day, dawn, dusk, or evening clock components. Here, we investigated diel starch turnover in the triple circadian clock mutant lhy cca1 elf3, which lacks the LATE ELONGATED HYPOCOTYL and the CIRCADIAN CLOCK-ASSOCIATED1 (CCA1) dawn components and the EARLY FLOWERING3 (ELF3) evening components of the circadian clock. The diel oscillations of transcripts for the remaining clock components and related genes like REVEILLE and PHYTOCHROME-INTERACING FACTOR family members exhibited attenuated amplitudes and altered peak time, weakened dawn dominance, and decreased robustness against changes in the external light-dark cycle. The triple mutant was unable to increase starch accumulation in short photoperiods. However, it was still able to pace starch mobilization to around dawn in different photoperiods and growth irradiances and to around 24 h after the previous dawn in T17 and T28 cycles. The triple mutant was able to slow down starch mobilization after a sudden low-light day or a sudden early dusk, although in the latter case it did not fully compensate for the lengthened night. Overall, there was a slight trend to less linear mobilization of starch. Thus, starch mobilization can be paced rather robustly to dawn despite a major disruption of the transcriptional clock. It is proposed that temporal information can be delivered from clock components or a semi-autonomous oscillator.
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Affiliation(s)
| | - Virginie Mengin
- School of Life Sciences, University of Essex, Colchester CO4 3SQ, UK
| | - Bruno Peixoto
- Instituto Gulbenkian de Ciência, Oeiras 2780-156,Portugal
- GREEN-IT Bioresources for Sustainability, ITQB NOVA, Oeiras 2780-157,Portugal
| | - Beatrice Encke
- Systematic Botany and Biodiversity, Humboldt University of Berlin, Berlin D-10115, Germany
| | - Nicole Krohn
- Abteilung für Parodontologie und Synoptische Zahnmedizin, Charité Universitätsmedizin, Berlin 14197, Germany
| | - Melanie Höhne
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm 14476, Germany
| | - Ursula Krause
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm 14476, Germany
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35
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Blair EJ, Goralogia GS, Lincoln MJ, Imaizumi T, Nagel DH. Clock-Controlled and Cold-Induced CYCLING DOF FACTOR6 Alters Growth and Development in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2022; 13:919676. [PMID: 35958204 PMCID: PMC9361860 DOI: 10.3389/fpls.2022.919676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 06/23/2022] [Indexed: 06/15/2023]
Abstract
The circadian clock represents a critical regulatory network, which allows plants to anticipate environmental changes as inputs and promote plant survival by regulating various physiological outputs. Here, we examine the function of the clock-regulated transcription factor, CYCLING DOF FACTOR 6 (CDF6), during cold stress in Arabidopsis thaliana. We found that the clock gates CDF6 transcript accumulation in the vasculature during cold stress. CDF6 mis-expression results in an altered flowering phenotype during both ambient and cold stress. A genome-wide transcriptome analysis links CDF6 to genes associated with flowering and seed germination during cold and ambient temperatures, respectively. Analysis of key floral regulators indicates that CDF6 alters flowering during cold stress by repressing photoperiodic flowering components, FLOWERING LOCUS T (FT), CONSTANS (CO), and BROTHER OF FT (BFT). Gene ontology enrichment further suggests that CDF6 regulates circadian and developmental-associated genes. These results provide insights into how the clock-controlled CDF6 modulates plant development during moderate cold stress.
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Affiliation(s)
- Emily J. Blair
- Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA, United States
| | - Greg S. Goralogia
- Department of Biology, University of Washington, Seattle, WA, United States
| | - Matthew J. Lincoln
- Department of Biology, University of Washington, Seattle, WA, United States
| | - Takato Imaizumi
- Department of Biology, University of Washington, Seattle, WA, United States
| | - Dawn H. Nagel
- Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA, United States
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36
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Insights into the Major Metabolites Involved in the Underground Floral Differentiation of Erythronium japonicum. BIOMED RESEARCH INTERNATIONAL 2022; 2022:7431151. [PMID: 35601148 PMCID: PMC9122723 DOI: 10.1155/2022/7431151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 03/30/2022] [Indexed: 11/17/2022]
Abstract
Background. Erythronium japonicum Decne (Liliaceae) is an early spring ephemeral with an underground initial floral differentiation stage. The flowering mechanism is crucial in ornamental plants due to the associated economic value. Therefore, this study is aimed at exploring the metabolic landscape during floral differentiation, including flower primordium, perianth, stamen, and the pistil differentiation period, in E. japonicum coupled with a conjoint analysis of the metabolome and transcriptome. Using ultraperformance liquid chromatography-tandem mass spectrometry, we identified 586 metabolites from 13 major metabolite classes. Comparative metabolomics between different floral developmental stages revealed several abundant metabolites during the respective phases. Upaccumulation of p-coumaroylputrescine, scopoletin, isorhoifolin, cosmosiin, genistin, and LysoPC 15 : 0 emphasized the significance of these compounds during flower development. Furthermore, previously identified DEGs, viz., EARLY FLOWERING 3, Flowering locus K, PHD finger-containing protein, and zinc finger SWIM domain-containing protein for floral differentiation, depicted a high correlation with lipid, flavonoid, and phenolics accumulation during floral developmental stages. Conclusions. Together, the results improve our interpretation of the underground floral development in E. japonicum.
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37
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Liu Y, Sun Y, Yao H, Zheng Y, Cao S, Wang H. Arabidopsis Circadian Clock Repress Phytochrome a Signaling. FRONTIERS IN PLANT SCIENCE 2022; 13:809563. [PMID: 35645991 PMCID: PMC9131076 DOI: 10.3389/fpls.2022.809563] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 04/04/2022] [Indexed: 06/15/2023]
Abstract
The plants' internal circadian clock can strongly influence phytochrome signaling in response to the changes in the external light environment. Phytochrome A (phyA) is the photoreceptor that mediates various far-red (FR) light responses. phyA signaling is modulated by FHY3 and FAR1, which directly activate the transcription of FHY1 and FHL, whose products are essential for light-induced phyA nuclear accumulation and subsequent light responses. However, the mechanisms by which the clock regulates phyA signaling are poorly understood. Here, we discovered that FHY1 expression is diurnally regulated, peaking in the middle of the day. Two Arabidopsis core clock components, CIRCADIAN CLOCK ASSOCIATED1 (CCA1) and TIMING OF CAB EXPRESSION1 (TOC1), repress FHY3/FAR1-mediated FHY1/FHL activation. Consistently, the specific expression pattern of FHY1 under diurnal conditions is altered in cca1-1, toc1-101, CCA1, and TOC1 overexpression plants. Furthermore, far-red induced gene expression and particularly nuclear accumulation of phyA are compromised in TOC1 and CCA1 overexpression seedlings. Our results therefore revealed a previously unidentified FHY1 expression pattern in diurnal cycles, which is negatively regulated by CCA1 and TOC1.
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Affiliation(s)
- Yang Liu
- College of Horticulture, China Agricultural University, Beijing, China
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
| | - Yanzhao Sun
- College of Horticulture, China Agricultural University, Beijing, China
| | - Heng Yao
- College of Horticulture, China Agricultural University, Beijing, China
| | - Yanyan Zheng
- College of Horticulture, China Agricultural University, Beijing, China
| | - Shuyuan Cao
- College of Horticulture, China Agricultural University, Beijing, China
| | - Haiyang Wang
- College of Life Sciences, South China Agricultural University, Guangzhou, China
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38
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Venkat A, Muneer S. Role of Circadian Rhythms in Major Plant Metabolic and Signaling Pathways. FRONTIERS IN PLANT SCIENCE 2022; 13:836244. [PMID: 35463437 PMCID: PMC9019581 DOI: 10.3389/fpls.2022.836244] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 02/23/2022] [Indexed: 05/10/2023]
Abstract
Plants require an endogenous regulatory network and mechanism to cope with diurnal environmental changes and compensate for their sessile nature. Plants use the circadian clock to anticipate diurnal changes. Circadian rhythm predicts a 24-h cycle with 16 h of light and 8 h of darkness in response to abiotic and biotic factors as well as the appropriate temperature. For a plant's fitness, proper growth, and development, these rhythms synchronize the diurnal photoperiodic changes. Input pathway, central oscillator, and output pathway are the three components that make up the endogenous clock. There are also transcriptional and translational feedback loops (TTFLs) in the clock, which are dependent on the results of gene expression. Several physiological processes, such as stress acclimatization, hormone signaling, morphogenesis, carbon metabolism, and defense response, are currently being investigated for their interactions with the circadian clock using phenotypic, genomic, and metabolic studies. This review examines the role of circadian rhythms in the regulation of plant metabolic pathways, such as photosynthesis and carbon metabolism, as well as developmental and degenerative processes, such as flowering and senescence. Furthermore, we summarized signaling pathways related to circadian rhythms, such as defense response and gene regulatory pathways.
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Affiliation(s)
- Ajila Venkat
- Horticulture and Molecular Physiology Lab, School of Agricultural Innovations and Advanced Learning, Vellore Institute of Technology, Vellore, India
- School of Biosciences and Technology, Vellore Institute of Technology, Vellore, India
| | - Sowbiya Muneer
- Horticulture and Molecular Physiology Lab, School of Agricultural Innovations and Advanced Learning, Vellore Institute of Technology, Vellore, India
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39
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Zioutopoulou A, Patitaki E, O’Donnell L, Kaiserli E. Low Fluence Ultraviolet-B Promotes Ultraviolet Resistance 8-Modulated Flowering in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2022; 13:840720. [PMID: 35432431 PMCID: PMC9009151 DOI: 10.3389/fpls.2022.840720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 02/09/2022] [Indexed: 06/14/2023]
Abstract
Ultraviolet-B (UV-B) irradiation (280-320 nm) is an integral part of sunlight and a pivotal environmental cue that triggers various plant responses, from photoprotection to photomorphogenesis and metabolic processes. UV-B is perceived by ULTRAVIOLET RESISTANCE 8 (UVR8), which orchestrates UV-B signal transduction and transcriptional control of UV-B-responsive genes. However, there is limited information on the molecular mechanism underlying the UV-B- and UVR8-dependent regulation of flowering time in plants. Here, we investigate the role of UV-B and UVR8 in photoperiodic flowering in Arabidopsis thaliana. Our findings suggest that UV-B controls photoperiodic flowering in an ecotype-specific manner and that UVR8 acts as a negative regulator of UV-B-induced flowering. Overall, our research shows that UV-B modulates flowering initiation through the action of UVR8 at the transcriptional level.
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40
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Ding YE, Zou YN, Wu QS, Kuča K. Mycorrhizal fungi regulate daily rhythm of circadian clock in trifoliate orange under drought stress. TREE PHYSIOLOGY 2022; 42:616-628. [PMID: 34617114 DOI: 10.1093/treephys/tpab132] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
The circadian rhythm of plants is associated with stress responses; however, it is not clear whether increased host plant drought tolerance by arbuscular mycorrhizal fungi (AMF) is associated with changes in the circadian clock. The present study aimed to analyze the effect of Funneliformis mosseae (Nicol. & Gerd.) Schüßler & Walker on the circadian clock gene expression patterns in trifoliate orange (Poncirus trifoliata L. Raf.) along with gas exchange, abscisic acid (ABA) levels and antioxidant enzyme gene expression under well-watered (WW) and drought stress (DS) conditions. Plant growth, net photosynthetic rate, stomatal conductance and ABA levels were significantly higher in AMF- than in non-AMF-inoculated plants regardless of soil water regimes. Six circadian clock genes, including PtPRR7, PtLHY, PtCCA1, PtGI, PtPIF3 and PtSRR1, were identified and showed rhythmic expression patterns over the course of the day. The AMF inoculation reduced the expression of most circadian clock genes in different time periods. However, AMF treatment significantly increased PtPRR7 and PtGI expression at 5:00 p.m. under WW and DS conditions, PtLHY expression at 1:00 a.m. and PtSRR1 expression at 9:00 p.m. At 1:00 a.m., AMF inoculation up-regulated the expression of the circadian clock genes PtPRR7, PtCCA1, PtLHY and PtPIF3 and the antioxidant enzyme genes PtFe-SOD, PtMn-SOD, PtCu/Zn-SOD, PtPOD and PtCAT1. Correlation analysis revealed that these changes in circadian clock gene expression were associated with antioxidant enzyme gene expression, root ABA and gas exchange. We concluded that mycorrhizal fungi have the ability to regulate the daily rhythm of the circadian clock in trifoliate orange plants in response to drought.
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Affiliation(s)
- Yu-E Ding
- College of Horticulture and Gardening, Yangtze University, Jingmi 88, Jingzhou, Hubei 434025, China
| | - Ying-Ning Zou
- College of Horticulture and Gardening, Yangtze University, Jingmi 88, Jingzhou, Hubei 434025, China
| | - Qiang-Sheng Wu
- College of Horticulture and Gardening, Yangtze University, Jingmi 88, Jingzhou, Hubei 434025, China
- Faculty of Science, Department of Chemistry, University of Hradec Kralove, Rokitanskeho 62, Hradec Kralove 50003, Czech Republic
| | - Kamil Kuča
- Faculty of Science, Department of Chemistry, University of Hradec Kralove, Rokitanskeho 62, Hradec Kralove 50003, Czech Republic
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41
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Osnato M, Cota I, Nebhnani P, Cereijo U, Pelaz S. Photoperiod Control of Plant Growth: Flowering Time Genes Beyond Flowering. FRONTIERS IN PLANT SCIENCE 2022; 12:805635. [PMID: 35222453 PMCID: PMC8864088 DOI: 10.3389/fpls.2021.805635] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 12/23/2021] [Indexed: 05/02/2023]
Abstract
Fluctuations in environmental conditions greatly influence life on earth. Plants, as sessile organisms, have developed molecular mechanisms to adapt their development to changes in daylength, or photoperiod. One of the first plant features that comes to mind as affected by the duration of the day is flowering time; we all bring up a clear image of spring blossom. However, for many plants flowering happens at other times of the year, and many other developmental aspects are also affected by changes in daylength, which range from hypocotyl elongation in Arabidopsis thaliana to tuberization in potato or autumn growth cessation in trees. Strikingly, many of the processes affected by photoperiod employ similar gene networks to respond to changes in the length of light/dark cycles. In this review, we have focused on developmental processes affected by photoperiod that share similar genes and gene regulatory networks.
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Affiliation(s)
- Michela Osnato
- Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Barcelona, Spain
- Institute of Environmental Science and Technology of the Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Ignacio Cota
- Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Barcelona, Spain
| | - Poonam Nebhnani
- Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Barcelona, Spain
| | - Unai Cereijo
- Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Barcelona, Spain
| | - Soraya Pelaz
- Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
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Pay ML, Kim DW, Somers DE, Kim JK, Foo M. Modelling of plant circadian clock for characterizing hypocotyl growth under different light quality conditions. IN SILICO PLANTS 2022; 4:diac001. [PMID: 35369361 PMCID: PMC8963510 DOI: 10.1093/insilicoplants/diac001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
To meet the ever-increasing global food demand, the food production rate needs to be increased significantly in the near future. Speed breeding is considered as a promising agricultural technology solution to achieve the zero-hunger vision as specified in the United Nations Sustainable Development Goal 2. In speed breeding, the photoperiod of the artificial light has been manipulated to enhance crop productivity. In particular, regulating the photoperiod of different light qualities rather than solely white light can further improve speed breading. However, identifying the optimal light quality and the associated photoperiod simultaneously remains a challenging open problem due to complex interactions between multiple photoreceptors and proteins controlling plant growth. To tackle this, we develop a first comprehensive model describing the profound effect of multiple light qualities with different photoperiods on plant growth (i.e. hypocotyl growth). The model predicts that hypocotyls elongated more under red light compared to both red and blue light. Drawing similar findings from previous related studies, we propose that this might result from the competitive binding of red and blue light receptors, primarily Phytochrome B (phyB) and Cryptochrome 1 (cry1) for the core photomorphogenic regulator, CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1). This prediction is validated through an experimental study on Arabidopsis thaliana. Our work proposes a potential molecular mechanism underlying plant growth under different light qualities and ultimately suggests an optimal breeding protocol that takes into account light quality.
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Affiliation(s)
- Miao Lin Pay
- Institute for Future Transport and Cities, Coventry University, Coventry CV1 2TE, UK
| | - Dae Wook Kim
- Department of Mathematical Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
- Biomedical Mathematics Group, Institute for Basic Science, Daejeon 34126, Republic of Korea
| | - David E Somers
- Department of Molecular Genetics, The Ohio State University, Columbus, OH 43210, USA
- Center for Applied Plant Sciences, The Ohio State University, Columbus, OH 43210, USA
| | - Jae Kyoung Kim
- Department of Mathematical Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
- Biomedical Mathematics Group, Institute for Basic Science, Daejeon 34126, Republic of Korea
| | - Mathias Foo
- School of Engineering, University of Warwick, Coventry CV4 7AL, UK
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Li C, Liu XJ, Yan Y, Alam MS, Liu Z, Yang ZK, Tao RF, Yue EK, Duan MH, Xu JH. OsLHY is involved in regulating flowering through the Hd1- and Ehd1- mediated pathways in rice (Oryza sativa L.). PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 315:111145. [PMID: 35067308 DOI: 10.1016/j.plantsci.2021.111145] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 06/14/2023]
Abstract
Flowering time (or heading date in crops) is a critical agronomic trait for rice reproduction and adaptation. The circadian clock is an endogenous oscillator that is involved in controlling photoperiodic flowering. The rice LATE ELONGATED HYPOCOTYL (OsLHY), the core oscillator component of circadian clock, is a homolog of the LHY/CCA1 in Arabidopsis. Here we showed that CRISPR/Cas9-engineered mutations in OsLHY caused late flowering in rice only under natural long-day (nLD) and short-day (nSD) conditions, but not artificial SD (10 h light/14 h dark) conditions. In the oslhy mutant, the diurnal expression of circadian clock-related genes was seriously affected under both LD and SD conditions. Furthermore, the expression of the flowering activators Ehd1, Hd3a and RFT1 was down-regulated and flowering repressors Hd1 and Ghd7 was up-regulated in the oslhy mutant under LD conditions. While the transcripts of flowering-related genes were not dramatically influenced under SD conditions. Dual-luciferase assays showed that OsLHY repressed the transcription of OsGI, Hd1, Ghd7, Hd3a, RFT1 and OsELF3, and activated the transcription of Ehd1. Moreover, the yeast one hybrid assay and electrophoretic mobility shift assay confirmed that OsLHY directly repressed OsGI, RFT1 and OsELF3 by binding to their promoters, which is consistent with that in Arabidopsis. These results suggested that the OsLHY can promote rice flowering mainly through regulating Hd1 and Ehd1.
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Affiliation(s)
- Chao Li
- Institute of Crop Science, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, 310058, China; Shandong (Linyi) Institute of Modern Agriculture, Zhejiang University, Shandong, 276034, China
| | - Xue-Jiao Liu
- Institute of Crop Science, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, 310058, China
| | - Yan Yan
- Institute of Crop Science, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, 310058, China
| | - Mohammad Shah Alam
- Institute of Crop Science, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, 310058, China
| | - Zhen Liu
- Institute of Crop Science, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, 310058, China
| | - Zhen-Kun Yang
- Institute of Crop Science, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, 310058, China
| | - Ruo-Fu Tao
- Institute of Crop Science, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, 310058, China
| | - Er-Kui Yue
- Institute of Crop Science, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, 310058, China
| | - Ming-Hua Duan
- Zhejiang Zhengjingyuan Pharmacy Chain Co., Ltd. & Hangzhou Zhengcaiyuan Pharmaceutical Co., Ltd., Hangzhou, 310021, China
| | - Jian-Hong Xu
- Institute of Crop Science, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, 310058, China; Shandong (Linyi) Institute of Modern Agriculture, Zhejiang University, Shandong, 276034, China.
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44
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Transcriptomic Insight into Underground Floral Differentiation in Erythronium japonicum. BIOMED RESEARCH INTERNATIONAL 2022; 2022:4447472. [PMID: 35087909 PMCID: PMC8789427 DOI: 10.1155/2022/4447472] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 11/23/2021] [Indexed: 12/18/2022]
Abstract
Erythronium japonicum Decne (Liliaceae) flowers in early spring after overwintering. Its sexual reproduction process includes an underground development process of floral organs, but the underlying molecular mechanisms are obscure. The present study is aimed at exploring the transcriptional changes and key genes involved at underground floral developmental stages, including flower primordium differentiation, perianth differentiation, stamen differentiation, and pistil differentiation in E. japonicum. Multistage high-quality transcriptomic data resulted in identifying putative candidate genes for underground floral differentiation in E. japonicum. A total of 174,408 unigenes were identified, 28,508 of which were differentially expressed genes (DEGs) at different floral developmental stages, while only 44 genes were identified with conserved regulation between different stages. Further annotation of DEGs resulted in the identification of 270 DEGs specific to floral differentiation. In addition, ELF3, PHD, cullin 1, SE14, ZSWIM3, GIGNATEA, and SERPIN B were identified as potential candidate genes involved in the regulation of floral differentiation. Besides, we explored transcription factors with differential regulation at different developmental stages and identified bHLH, FAR1, mTERF, MYB-related, NAC, Tify, and WRKY TFs for their potential involvement in the underground floral differentiation process. Together, these results laid the foundation for future molecular works to improve our understanding of the underground floral differentiation process and its genetic regulation in E. japonicum.
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Bonnot T, Blair EJ, Cordingley SJ, Nagel DH. Circadian coordination of cellular processes and abiotic stress responses. CURRENT OPINION IN PLANT BIOLOGY 2021; 64:102133. [PMID: 34773857 DOI: 10.1016/j.pbi.2021.102133] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 09/24/2021] [Accepted: 09/27/2021] [Indexed: 06/13/2023]
Abstract
Diel changes in the environment are perceived by the circadian clock which transmits temporal information throughout the plant cell to synchronize daily and seasonal environmental signals with internal biological processes. Dynamic modulations of diverse levels of clock gene regulation within the plant cell are impacted by stress. Recent insights into circadian control of cellular processes such as alternative splicing, polyadenylation, and noncoding RNAs are discussed. We highlight studies on the circadian regulation of reactive oxygen species, calcium signaling, and gating of temperature stress responses. Finally, we briefly summarize recent work on the translation-specific rhythmicity of cell cycle genes and the control of subcellular localization and relocalization of oscillator components. Together, this mini-review highlights these cellular events in the context of clock gene regulation and stress responses in Arabidopsis.
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Affiliation(s)
- Titouan Bonnot
- University of California, Riverside, Department of Botany and Plant Sciences, Riverside, CA 92507, USA
| | - Emily J Blair
- University of California, Riverside, Department of Botany and Plant Sciences, Riverside, CA 92507, USA
| | - Samantha J Cordingley
- University of California, Riverside, Department of Botany and Plant Sciences, Riverside, CA 92507, USA
| | - Dawn H Nagel
- University of California, Riverside, Department of Botany and Plant Sciences, Riverside, CA 92507, USA.
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Lin J, Yu Z, Ye C, Hong L, Chu Y, Shen Y, Li QQ. Alternative polyadenylated mRNAs behave as asynchronous rhythmic transcription in Arabidopsis. RNA Biol 2021; 18:2594-2604. [PMID: 34036876 PMCID: PMC8632115 DOI: 10.1080/15476286.2021.1933732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 03/03/2021] [Accepted: 05/17/2021] [Indexed: 10/21/2022] Open
Abstract
Alternative polyadenylation (APA) is a widespread post-transcriptional modification method that changes the 3' ends of transcripts by altering poly(A) site usage. However, the longitudinal transcriptomic 3' end profile and its mechanism of action are poorly understood. We applied diurnal time-course poly(A) tag sequencing (PAT-seq) for Arabidopsis and identified 3284 genes that generated both rhythmic and arrhythmic transcripts. These two classes of transcripts appear to exhibit dramatic differences in expression and translation activisty. The asynchronized transcripts derived by APA are embedded with different poly(A) signals, especially for rhythmic transcripts, which contain higher AAUAAA and UGUA signal proportions. The Pol II occupancy maximum is reached upstream of rhythmic poly(A) sites, while it is present directly at arrhythmic poly(A) sites. Integrating H3K9ac and H3K4me3 time-course data analyses revealed that transcriptional activation of histone markers may be involved in the differentiation of rhythmic and arrhythmic APA transcripts. These results implicate an interplay between histone modification and RNA 3'-end processing, shedding light on the mechanism of transcription rhythm and alternative polyadenylation.
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Affiliation(s)
- Juncheng Lin
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, USA
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Zhibo Yu
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Congting Ye
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Liwei Hong
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Yiru Chu
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Yingjia Shen
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Qingshun Q. Li
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, USA
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
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47
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Nimmo HG, Laird J. Arabidopsis thaliana PRR7 Provides Circadian Input to the CCA1 Promoter in Shoots but not Roots. FRONTIERS IN PLANT SCIENCE 2021; 12:750367. [PMID: 34733306 PMCID: PMC8559795 DOI: 10.3389/fpls.2021.750367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 09/23/2021] [Indexed: 05/24/2023]
Abstract
The core of the plant circadian clock involves multiple interlocking gene expression loops and post-translational controls along with inputs from light and metabolism. The complexity of the interactions is such that few specific functions can be ascribed to single components. In previous work, we reported differences in the operation of the clocks in Arabidopsis shoots and roots, including the effects of mutations of key clock components. Here, we have used luciferase imaging to study prr7 mutants expressing CCA1::LUC and GI::LUC markers. In mature shoots expressing CCA1::LUC, loss of PRR7 radically altered behaviour in light:dark cycles and caused loss of rhythmicity in constant light but had little effect on roots. In contrast, in mature plants expressing GI::LUC, loss of PRR7 had little effect in light:dark cycles but in constant light increased the circadian period in shoots and reduced it in roots. We conclude that most or all of the circadian input to the CCA1 promoter in shoots is mediated by PRR7 and that loss of PRR7 has organ-specific effects. The results emphasise the differences in operation of the shoot and root clocks, and the importance of studying clock mutants in both light:dark cycles and constant light.
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48
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Muroya M, Oshima H, Kobayashi S, Miura A, Miyamura Y, Shiota H, Onai K, Ishiura M, Manabe K, Kutsuna S. Circadian Clock in Arabidopsis thaliana Determines Flower Opening Time Early in the Morning and Dominantly Closes Early in the Afternoon. PLANT & CELL PHYSIOLOGY 2021; 62:883-893. [PMID: 33822207 DOI: 10.1093/pcp/pcab048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 03/28/2021] [Accepted: 04/02/2021] [Indexed: 06/12/2023]
Abstract
Many plant species exhibit diurnal flower opening and closing, which is an adaptation influenced by the lifestyle of pollinators and herbivores. However, it remains unclear how these temporal floral movements are modulated. To clarify the role of the circadian clock in flower movement, we examined temporal floral movements in Arabidopsis thaliana. Wild-type (accessions; Col-0, Ler-0 and Ws-4) flowers opened between 0.7 and 1.4 h in a 16-h light period and closed between 7.5 and 8.3 h in a diurnal light period. In the arrhythmic mutants pcl1-1 and prr975, the former flowers closed slowly and imperfectly and the latter ones never closed. Under continuous light conditions, new flowers emerged and opened within a 23-26 h window in the wild-type, but the flowers in pcl1-1 and prr975 developed straight petals, whose curvatures were extremely small. Anti-phasic circadian gene expression of CIRCADIAN CLOCK ASSOCIATED 1 (CCA1), LATE ELONGATED HYPOCOTYLE (LHY) and TIMING OF CAB EXPRESSION 1 (TOC1) occurred in wild-type flowers, but non-rhythmic expression was observed in pcl1-1 and prr975 mutants. Focusing on excised petals, bioluminescence monitoring revealed rhythmic promoter activities of genes expressed (CCA1, LHY and PHYTOCLOCK 1/LUX ARRHYTHMO, PCL1/LUX) in the morning and evening. These results suggest that the clock induces flower opening redundantly with unknown light-sensing pathways. By contrast, flower closing is completely dependent on clock control. These findings will lead to further exploration of the molecular mechanisms and evolutionary diversity of timing in flower opening and closing.
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Affiliation(s)
- Mitsuhiko Muroya
- Department of Life and Environmental System Science, Yokohama City University, Seto 22, Kanazawa-ku, Yokohama, 236-0027 Japan
| | - Haruka Oshima
- Department of Life and Environmental System Science, Yokohama City University, Seto 22, Kanazawa-ku, Yokohama, 236-0027 Japan
| | - Shoko Kobayashi
- Department of Life and Environmental System Science, Yokohama City University, Seto 22, Kanazawa-ku, Yokohama, 236-0027 Japan
| | - Aya Miura
- Department of Life and Environmental System Science, Yokohama City University, Seto 22, Kanazawa-ku, Yokohama, 236-0027 Japan
| | - Yohei Miyamura
- Department of Life and Environmental System Science, Yokohama City University, Seto 22, Kanazawa-ku, Yokohama, 236-0027 Japan
| | - Hajime Shiota
- Department of Life and Environmental System Science, Yokohama City University, Seto 22, Kanazawa-ku, Yokohama, 236-0027 Japan
| | - Kiyoshi Onai
- Centre for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602 Japan
- Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-kuKyoto 606-8502Japan
| | - Masahiro Ishiura
- Centre for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602 Japan
| | - Katsushi Manabe
- Department of Life and Environmental System Science, Yokohama City University, Seto 22, Kanazawa-ku, Yokohama, 236-0027 Japan
| | - Shinsuke Kutsuna
- Department of Life and Environmental System Science, Yokohama City University, Seto 22, Kanazawa-ku, Yokohama, 236-0027 Japan
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Xu Y, Zhu Z. PIF4 and PIF4-Interacting Proteins: At the Nexus of Plant Light, Temperature and Hormone Signal Integrations. Int J Mol Sci 2021; 22:10304. [PMID: 34638641 PMCID: PMC8509071 DOI: 10.3390/ijms221910304] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/19/2021] [Accepted: 09/21/2021] [Indexed: 11/16/2022] Open
Abstract
Basic helix-loop-helix (bHLH) family transcription factor PHYTOCHROME INTERACTING FACTOR 4 (PIF4) is necessary for plant adaption to light or high ambient temperature. PIF4 directly associates with plenty of its target genes and modulates the global transcriptome to induce or reduce gene expression levels. However, PIF4 activity is tightly controlled by its interacting proteins. Until now, twenty-five individual proteins have been reported to physically interact with PIF4. These PIF4-interacting proteins act together with PIF4 and form a unique nexus for plant adaption to light or temperature change. In this review, we will discuss the different categories of PIF4-interacting proteins, including photoreceptors, circadian clock regulators, hormone signaling components, and transcription factors. These distinct PIF4-interacting proteins either integrate light and/or temperature cues with endogenous hormone signaling, or control PIF4 abundances and transcriptional activities. Taken together, PIF4 and PIF4-interacting proteins play major roles for exogenous and endogenous signal integrations, and therefore establish a robust network for plants to cope with their surrounding environmental alterations.
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Affiliation(s)
- Yang Xu
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing 210023, China;
| | - Ziqiang Zhu
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing 210023, China;
- Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, Department of Biology, Institute of Plant and Food Science, Southern University of Science and Technology, Shenzhen 518055, China
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50
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Sun C, Zhang K, Zhou Y, Xiang L, He C, Zhong C, Li K, Wang Q, Yang C, Wang Q, Chen C, Chen D, Wang Y, Liu C, Yang B, Wu H, Chen X, Li W, Wang J, Xu P, Wang P, Fang J, Chu C, Deng X. Dual function of clock component OsLHY sets critical day length for photoperiodic flowering in rice. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:1644-1657. [PMID: 33740293 PMCID: PMC8384598 DOI: 10.1111/pbi.13580] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/18/2021] [Accepted: 03/08/2021] [Indexed: 05/11/2023]
Abstract
Circadian clock, an endogenous time-setting mechanism, allows plants to adapt to unstable photoperiod conditions and induces flowering with proper timing. In Arabidopsis, the central clock oscillator was formed by a series of interlocked transcriptional feedback loops, but little is known in rice so far. By MutMap technique, we identified the candidate gene OsLHY from a later flowering mutant lem1 and further confirmed it through genetic complementation, RNA interference knockdown, and CRISPR/Cas9-knockout. Global transcriptome profiling and expression analyses revealed that OsLHY might be a vital circadian rhythm component. Interestingly, oslhy flowered later under ≥12 h day length but headed earlier under ≤11 h day length. qRT-PCR results exhibited that OsLHY might function through OsGI-Hd1 pathway. Subsequent one-hybrid assays in yeast, DNA affinity purification qPCR, and electrophoretic mobility shift assays confirmed OsLHY could directly bind to the CBS element in OsGI promoter. Moreover, the critical day length (CDL) for function reversal of OsLHY in oslhy (11-12 h) was prolonged in the double mutant oslhy osgi (about 13.5 h), indicating that the CDL set by OsLHY was OsGI dependent. Additionally, the dual function of OsLHY entirely relied on Hd1, as the double mutant oslhy hd1 showed the same heading date with hd1 under about 11.5, 13.5, and 14 h day lengths. Together, OsLHY could fine-tune the CDL by directly regulating OsGI, and Hd1 acts as the final effector of CDL downstream of OsLHY. Our study illustrates a new regulatory mechanism between the circadian clock and photoperiodic flowering.
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Affiliation(s)
- Changhui Sun
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Kuan Zhang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Yi Zhou
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Lin Xiang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Changcai He
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Chao Zhong
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Ke Li
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Qiuxia Wang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Chuanpeng Yang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Qian Wang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Congping Chen
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Dan Chen
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Yang Wang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Chuanqiang Liu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Bin Yang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Hualin Wu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Xiaoqiong Chen
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Weitao Li
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Jing Wang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Peizhou Xu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Pingrong Wang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
| | - Jun Fang
- Key Laboratory of Soybean Molecular Design BreedingNortheast Institute of Geography and AgroecologyChinese Academy of SciencesHarbinChina
| | - Chengcai Chu
- State Key Laboratory of Plant GenomicsInstitute of Genetics and Developmental BiologyThe Innovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
| | - Xiaojian Deng
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest ChinaRice Research InstituteSichuan Agricultural UniversityChengduChina
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