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Li H, Zhang Y, Lan J, Wang S, Cai H, Meng X, Ren Y, Yang M. Identification of Differentially Expressed lncRNAs in Response to Blue Light and Expression Pattern Analysis of Populus tomentosa Hybrid Poplar 741. PLANTS (BASEL, SWITZERLAND) 2023; 12:3157. [PMID: 37687403 PMCID: PMC10490017 DOI: 10.3390/plants12173157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/25/2023] [Accepted: 08/30/2023] [Indexed: 09/10/2023]
Abstract
Poplar is an important shelterbelt, timber stand, and city tree species that has been the focus of forestry research. The regulatory role of the long non-coding RNA molecule (lncRNA; length > 200 nt) has been a research hotspot in plants. In this study, seedlings of 741 poplar were irradiated with LED blue and white light, and the Illumina HiSeq 2000 sequencing platform was used to identify lncRNAs. |logFC| > 1 and p < 0.05 were considered to indicate differentially expressed lncRNAs, and nine differentially expressed lncRNAs were screened, the target genes of which were predicted, and three functionally annotated target genes were obtained. The differentially expressed lncRNAs were identified as miRNA targets. Six lncRNAs were determined to be target sites for twelve mRNAs in six miRNA families. LncRNAs and their target genes, including lncRNA MSTRG.20413.1-ptc-miR396e-5p-GRF9, were verified using quantitative real-time polymerase chain reaction analysis, and the expression patterns were analyzed. The analysis showed that the ptc-miR396e-5p expression was downregulated, while lncRNA MSTRG.20413.1 and GRF9 expression was upregulated, after blue light exposure. These results indicate that lncRNAs interact with miRNAs to regulate gene expression and affect plant growth and development.
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Affiliation(s)
- Hongyan Li
- Forest Department, Forestry College, Hebei Agricultural University, Baoding 071000, China; (H.L.); (Y.Z.); (S.W.); (H.C.); (X.M.); (Y.R.)
- Hebei Key Laboratory for Tree Genetic Resources and Forest Protection, Baoding 071000, China
| | - Yiwen Zhang
- Forest Department, Forestry College, Hebei Agricultural University, Baoding 071000, China; (H.L.); (Y.Z.); (S.W.); (H.C.); (X.M.); (Y.R.)
- Hebei Key Laboratory for Tree Genetic Resources and Forest Protection, Baoding 071000, China
| | - Jinping Lan
- Life Science Research Center, Hebei North University, Zhangjiakou 075000, China;
| | - Shijie Wang
- Forest Department, Forestry College, Hebei Agricultural University, Baoding 071000, China; (H.L.); (Y.Z.); (S.W.); (H.C.); (X.M.); (Y.R.)
- Hebei Key Laboratory for Tree Genetic Resources and Forest Protection, Baoding 071000, China
| | - Hongyu Cai
- Forest Department, Forestry College, Hebei Agricultural University, Baoding 071000, China; (H.L.); (Y.Z.); (S.W.); (H.C.); (X.M.); (Y.R.)
- Hebei Key Laboratory for Tree Genetic Resources and Forest Protection, Baoding 071000, China
| | - Xin Meng
- Forest Department, Forestry College, Hebei Agricultural University, Baoding 071000, China; (H.L.); (Y.Z.); (S.W.); (H.C.); (X.M.); (Y.R.)
- Hebei Key Laboratory for Tree Genetic Resources and Forest Protection, Baoding 071000, China
| | - Yachao Ren
- Forest Department, Forestry College, Hebei Agricultural University, Baoding 071000, China; (H.L.); (Y.Z.); (S.W.); (H.C.); (X.M.); (Y.R.)
- Hebei Key Laboratory for Tree Genetic Resources and Forest Protection, Baoding 071000, China
| | - Minsheng Yang
- Forest Department, Forestry College, Hebei Agricultural University, Baoding 071000, China; (H.L.); (Y.Z.); (S.W.); (H.C.); (X.M.); (Y.R.)
- Hebei Key Laboratory for Tree Genetic Resources and Forest Protection, Baoding 071000, China
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Sharova E, Bilova T, Tsvetkova E, Smolikova G, Frolov A, Medvedev S. Red light-induced inhibition of maize ( Zea mays) mesocotyl elongation: evaluation of apoplastic metabolites. FUNCTIONAL PLANT BIOLOGY : FPB 2023; 50:532-539. [PMID: 37258494 DOI: 10.1071/fp22181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 12/09/2022] [Indexed: 06/02/2023]
Abstract
Light is a crucial factor affecting plant growth and development. Besides providing the energy for photosynthesis, light serves as a sensory cue to control the adaptation of plants to environmental changes. We used the etiolated maize (Zea mays ) seedlings as a model system to study the red light-regulated growth. Exposure of the maize seedlings to red light resulted in growth inhibition of mesocotyls. We demonstrate for the first time (to the best our knowledge) that red light affected the patterns of apoplastic fluid (AF) metabolites extracted from the mesocotyl segments. By means of the untargeted gas chromatography-mass spectrometry (GC-MS)-based metabolomics approach, we identified 44 metabolites in the AF of maize mesocotyls and characterised the dynamics of their relative tissue abundances. The characteristic metabolite patterns of mesocotyls dominated with mono- and disaccharides, organic acids, amino acids, and other nitrogen-containing compounds. Upon red light irradiation, the contents of β -alanine, putrescine and trans -aconitate significantly increased (P -value<0.05). In contrast, there was a significant decrease in the total ascorbate content in the AF of maize mesocotyls. The regulatory role of apoplastic metabolites in the red light-induced inhibition of maize mesocotyl elongation is discussed.
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Affiliation(s)
- Elena Sharova
- Department of Plant Physiology and Biochemistry, Saint Petersburg State University, Saint Petersburg, Russian Federation
| | - Tatiana Bilova
- Department of Plant Physiology and Biochemistry, Saint Petersburg State University, Saint Petersburg, Russian Federation; and K.A. Timiryazev Institute of Plant Physiology RAS, Moscow, Russian Federation
| | - Elena Tsvetkova
- Department of Biochemistry, Saint Petersburg State University, Saint Petersburg, Russian Federation
| | - Galina Smolikova
- Department of Plant Physiology and Biochemistry, Saint Petersburg State University, Saint Petersburg, Russian Federation
| | - Andrej Frolov
- K.A. Timiryazev Institute of Plant Physiology RAS, Moscow, Russian Federation
| | - Sergei Medvedev
- Department of Plant Physiology and Biochemistry, Saint Petersburg State University, Saint Petersburg, Russian Federation
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Takahashi M, Mikami K. Blue–red chromatic acclimation in the red alga Pyropia yezoensis. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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New insights into the response of maize to fluctuations in the light environment. Mol Genet Genomics 2021; 296:615-629. [PMID: 33630129 DOI: 10.1007/s00438-021-01761-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 01/11/2021] [Indexed: 10/22/2022]
Abstract
Light is the most important environmental cue signaling the transition from skotomorphogenesis to photomorphogenesis, thus affecting plant development and metabolic activity. How the light response mechanisms of maize seedlings respond to fluctuations in the light environment has not been well characterized to date. In this study, we built a gene coexpression network from a dynamic transcriptomic map of maize seedlings exposed to different light environments. Coexpression analysis identified ten modules and multiple genes that closely correlate with photosynthesis and characterized hub genes associated with regulatory networks, duplication events, domestication and improvement. In addition, we identified that 38% of hub genes underwent duplication events, 74% of which are related to photosynthesis. Moreover, we captured the dynamic expression atlas of gene sets involved in the chloroplast photosynthetic apparatus and photosynthetic carbon assimilation in different light environments, which should help to elucidate the key mechanisms and regulatory networks that underlie photosynthesis in maize. Insights from this study provide a valuable resource to better understand the genetic mechanisms of the response to fluctuations in the light environment in maize.
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Transcriptome analysis and physiological responses of the potato plantlets in vitro under red, blue, and white light conditions. 3 Biotech 2018; 8:394. [PMID: 30221107 DOI: 10.1007/s13205-018-1410-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 08/17/2018] [Indexed: 10/28/2022] Open
Abstract
Light is an important factor for plant development and has serious effects on the growth, production and quality of potatoes. However, the physical and molecular mechanisms by which potato plantlets cope with different light qualities are not understood. In this study, the potato "Zhuanxinwu", which is a germplasm potato resource with a high anthocyanin content, was used for physiological and transcriptome profiling analyses to uncover the different mechanisms that occur in response to blue, red and white light conditions, with the white light condition serving as the control. Multiple growth indexes, protective enzyme activity and metabolite accumulation were measured. The results indicated that white light promoted a shift in biomass allocation away from tubers to leaves to enhance dry leaf matter and reduce tuber fresh/dry weight relative to the effects of blue or red light. The leaf area and anthocyanin content values were greater for plants grown in blue light than those grown in white or red light, suggesting that combinations of different spectra were more conducive to regulating potato growth. A total of 2220 differentially expressed genes (DEGs) were found among the three samples, and the DEGs in the three comparison sets were analyzed. A total of 1180 and 984 DEGs were identified in the red light (Red) and blue light (Blue) conditions compared to the control condition, respectively, and 359 DEGs overlapped between the two comparison sets (Blue_vs_White and Red_vs_White). Interestingly, the 24 most common overlapped DEGs were involved in photosynthesis, respiration, and reactive oxygen species (ROS) scavenging. Of these DEGs, four genes involved in photosynthesis and two genes involved in pigment synthesis were highly expressed, implying that some genes could be implemented to cope with different light spectra by regulating the expression of DEGs involved in the corresponding metabolic pathways. In conclusion, our study characterizes physiological responses of potato to different light qualities and identifies potential pathways and candidate genes involved in these responses, thus providing a basis for further research on artificial light regulation of potato plant growth.
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Long J, Chu F, Wang Y, Zhao C, Dong W, Yuan X, Ma C, Wen Z, Ma R, Du M, Cao Y. M8MgSc(PO4)7:xDy3+ (M = Ca/Sr) Single-Phase Full-Color Phosphor with High Thermal Emission Stability. Inorg Chem 2017; 56:10381-10386. [DOI: 10.1021/acs.inorgchem.7b01268] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiaqi Long
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China
| | - Fujuan Chu
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China
| | - Yuzhen Wang
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China
| | - Chong Zhao
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China
| | - Wenfeng Dong
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China
| | - Xuanyi Yuan
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China
| | - Chaoyang Ma
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China
| | - Zicheng Wen
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China
| | - Ran Ma
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China
| | - Miaomiao Du
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China
| | - Yongge Cao
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China
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7
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Deb R, Nagotu S. Versatility of peroxisomes: An evolving concept. Tissue Cell 2017; 49:209-226. [DOI: 10.1016/j.tice.2017.03.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Revised: 03/05/2017] [Accepted: 03/06/2017] [Indexed: 02/04/2023]
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Fragoso V, Oh Y, Kim SG, Gase K, Baldwin IT. Functional specialization of Nicotiana attenuata phytochromes in leaf development and flowering time. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2017; 59:205-224. [PMID: 28009482 DOI: 10.1111/jipb.12516] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 12/19/2016] [Indexed: 06/06/2023]
Abstract
Phytochromes mainly function in photoautotrophic organisms to adjust growth in response to fluctuating light signals. The different isoforms of plant phytochromes often display both conserved and divergent roles, presumably to fine-tune plant responses to environmental signals and optimize fitness. Here we describe the distinct, yet partially redundant, roles of phytochromes NaPHYA, NaPHYB1 and NaPHYB2 in a wild tobacco species, Nicotiana attenuata using RNAi-silenced phytochrome lines. Consistent with results reported from other species, silencing the expression of NaPHYA or NaPHYB2 in N. attenuata had mild or no influence on plant development as long as NaPHYB1 was functional; whereas silencing the expression of NaPHYB1 alone strongly altered flowering time and leaf morphology. The contribution of NaPHYB2 became significant only in the absence of NaPHYB1; plants silenced for both NaPHYB1 and NaPHYB2 largely skipped the rosette-stage of growth to rapidly produce long, slender stalks that bore flowers early: hallmarks of the shade-avoidance responses. The phenotyping of phytochrome-silenced lines, combined with sequence and transcript accumulation analysis, suggest the independent functional diversification of the phytochromes, and a dominant role of NaPHYB1 and NaPHYB2 in N. attenuata's vegetative and reproductive development.
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Affiliation(s)
- Variluska Fragoso
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, D-07745 Jena, Germany
| | - Youngjoo Oh
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, D-07745 Jena, Germany
| | - Sang-Gyu Kim
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, D-07745 Jena, Germany
| | - Klaus Gase
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, D-07745 Jena, Germany
| | - Ian Thomas Baldwin
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, D-07745 Jena, Germany
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Wang Z, Rashotte AM, Dane F. Citrullus colocynthis NAC transcription factors CcNAC1 and CcNAC2 are involved in light and auxin signaling. PLANT CELL REPORTS 2014; 33:1673-86. [PMID: 24972826 DOI: 10.1007/s00299-014-1646-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2014] [Accepted: 06/11/2014] [Indexed: 05/06/2023]
Abstract
Two novel NAC transcription factors from C itrullus colocynthis implicated in light and auxin signaling pathway. NAC transcription factors (NAM, ATAF1, 2, CUC2) have multiple functions in plant growth and development. Two NACs, CcNAC1 and CcNAC2, were recently identified in the highly drought-tolerant cucurbit species, Citrullus colocynthis. This study examines the functional role of these genes under different qualities of light based on the in silico analysis of the CcNAC1 and CcNAC2 promoters that revealed the presence of several light-associated motifs. The impact of both light and auxin on CcNAC1 and CcNAC2 expression was examined in C. colocynthis leaves, and using reporter (pCcNAC1, 2::GUS) lines in Arabidopsis. Furthermore, the effects of constitutive overexpression (OE-CcNAC1, 2) in Arabidopsis were also examined under a range of conditions to confirm reporter line linkages. White, blue, red, and far-red light treatments resulted in similar patterns of quantitative changes in CcNAC1and CcNAC2 expression in both species, with the highest transcript increases following red light. Photomorphogenic changes in Arabidopsis hypocotyls were correlated with gene transcript levels. In the absence of light, hypocotyls of OE-CcNAC1/CcNAC2 lines were significantly longer as compared to WT. The addition of exogenous auxin (+IAA) to growth medium also resulted in changes to the hypocotyl lengths of overexpression lines and spatiotemporal reporter line changes in seedlings. Our data suggest that CcNAC1, 2 might be functionally important in the light signaling pathway, and appear connected to the hormone auxin. This is the first study to indicate that NAC genes might play a role in both light and auxin signaling pathways.
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Affiliation(s)
- Zhuoyu Wang
- Department of Horticulture, Auburn University, Auburn, AL, 36849, USA
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de Costa F, Yendo ACA, Fleck JD, Gosmann G, Fett-Neto AG. Accumulation of a bioactive triterpene saponin fraction of Quillaja brasiliensis leaves is associated with abiotic and biotic stresses. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2013; 66:56-62. [PMID: 23474431 DOI: 10.1016/j.plaphy.2013.02.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Accepted: 02/07/2013] [Indexed: 05/11/2023]
Abstract
The saponins from leaves of Quillaja brasiliensis, a native species from Southern Brazil, show structural and functional similarities to those of Quillaja saponaria barks, which are currently used as adjuvants in vaccine formulations. The accumulation patterns of an immunoadjuvant fraction of leaf triterpene saponins (QB-90) in response to stress factors were examined, aiming at understanding the regulation of accumulation of these metabolites. The content of QB-90 in leaf disks was significantly increased by application of different osmotic stress agents, such as sorbitol, sodium chloride and polyethylene glycol in isosmotic concentrations. Higher yields of bioactive saponins were also observed upon exposure to salicylic acid, jasmonic acid, ultrasound and UV-C light. Experiments with shoots indicated a significant increase in QB-90 yields with moderate increases in white light irradiance and by mechanical damage applied to leaves. The increased accumulation of these terpenes may be part of a defense response. The results herein described may contribute to further advance knowledge on the regulation of accumulation of bioactive saponins, and at defining strategies to improve yields of these useful metabolites.
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Affiliation(s)
- Fernanda de Costa
- Department of Botany, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
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Tassoni A, Durante L, Ferri M. Combined elicitation of methyl-jasmonate and red light on stilbene and anthocyanin biosynthesis. JOURNAL OF PLANT PHYSIOLOGY 2012; 169:775-781. [PMID: 22424571 DOI: 10.1016/j.jplph.2012.01.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 01/13/2012] [Accepted: 01/17/2012] [Indexed: 05/31/2023]
Abstract
Vitis vinifera cell suspensions are a suitable system to study the metabolic regulation of a large range of polyphenols, including flavonoids and stilbenes that play important roles in plant development. Grape cv. Barbera petioles cell cultures were treated with red light and 10 μM methyl-jasmonate (MeJA), alone or in combination, to investigate their influence and/or induction effect on the production of anthocyanins, catechins and free and mono-glucosylated stilbenes. The synthesis of total anthocyanins was slightly decreased by red light alone, while MeJA and MeJA plus red light increased the levels of these metabolites. When compared to the relative controls, the red light treatment decreased the amount of catechins and increased their release in the culture medium, while MeJA alone or in combination with red light increased their production. Red light treatment generally enhanced the amount of free and mono-glucosylated stilbenes during the entire observation period, as well as the percentage of their release in the media. Treatment with MeJA strongly promoted the production of total stilbenes, which was further elicited by the MeJA plus red light treatment. During the combined treatment, the presence of the light stimulus improved the effect of MeJA by anticipating the maximum increase of stilbenes which were also largely released (up to 90%). These results demonstrate that, in grapevine, as in other plant systems, the change of conditions in which the MeJA stimulus is perceived (e.g. going from total white to red light) drastically modifies the plant response to this hormone. The present paper confirms that the jasmonate transduction pathway is integrated into an elaborate signaling network that also comprehends the red light signaling pathway.
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Affiliation(s)
- Annalisa Tassoni
- Department of Experimental Evolutionary Biology, University of Bologna, Via Irnerio 42, 40126 Bologna, Italy.
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Paddock T, Lima D, Mason ME, Apel K, Armstrong GA. Arabidopsis light-dependent protochlorophyllide oxidoreductase A (PORA) is essential for normal plant growth and development. PLANT MOLECULAR BIOLOGY 2012; 78:447-60. [PMID: 22278767 DOI: 10.1007/s11103-012-9873-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2011] [Accepted: 12/29/2011] [Indexed: 05/08/2023]
Abstract
During skotomorphogenesis in angiosperms, NADPH:protochlorophyllide oxidoreductase (POR) forms an aggregate of photolabile NADPH-POR-protochlorophyllide (Pchlide) ternary complexes localized to the prolamellar bodies within etioplasts. During photomorphogenesis, POR catalyzes the light-dependent reduction of Pchlide a to chlorophyllide (Chlide) a, which is subsequently converted to chlorophyll (Chl). In Arabidopsis there are three structurally related POR genes, denoted PORA, PORB and PORC. The PORA and PORB proteins accumulate during skotomorphogenesis. During illumination, PORA is only transiently expressed, whereas PORB and PORC persist and are responsible for bulk Chl synthesis throughout plant development. Here we have tested whether PORA is important for skotomorphogenesis by assisting in etioplast development, and normal photomorphogenic development. Using reverse genetic approaches, we have identified the porA-1 null mutant, which contains an insertion of the maize Dissociation transposable element in the PORA gene. Additionally, we have characterized PORA RNAi lines. The porA-1 and PORA RNAi lines display severe photoautotrophic growth defects, which can be partially rescued on sucrose-supplemented growth media. Elimination of PORA during skotomorphogenesis results in reductions in the volume and frequency of prolamellar bodies, and in photoactive Pchlide conversion. The porA-1 mutant characterization thus establishes a quantitative requirement for PORA in etioplast development by demonstrating significant membrane ultrastructural and biochemical defects, in addition to suggesting PORA-specific functions in photomorphogenesis and plant development.
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Affiliation(s)
- Troy Paddock
- Department of Plant Cellular and Molecular Biology, The Ohio State University, Columbus, OH 43210-1293, USA.
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Ribas-Carbo M, Giles L, Flexas J, Briggs W, Berry JA. Phytochrome-driven changes in respiratory electron transport partitioning in soybean (Glycine max. L.) cotyledons. PLANT BIOLOGY (STUTTGART, GERMANY) 2008; 10:281-7. [PMID: 18426475 DOI: 10.1111/j.1438-8677.2008.00046.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
After it was observed that light induces changes in electron partitioning between the cytochrome and the alternative pathway, the focus interest was directed to assessing what type of photoreceptors are involved and the extent of such modifications. Studies on 5-day-old soybean (Glycine max L.) cotyledons using an oxygen isotope fractionation technique showed that phytochrome is involved in changes in electron partitioning between the cytochrome and the alternative respiratory pathway. A follow-up of a previous study, showing that 5 min of white light caused changes in mitochondrial electron partitioning, demonstrated that while blue light was not involved in any such changes, red light caused a significant shift of electrons toward the alternative pathway. The major shift, observed after 24 h of light, is mainly due to both a decrease in the activity of the cytochrome pathway and an increase in the activity of the alternative pathway. The involvement of a phytochrome receptor was confirmed by demonstration of reversibility by far-red light. The implications of the possible involvement of phytochrome in the regulation of mitochondrial electron transport are discussed.
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Affiliation(s)
- M Ribas-Carbo
- Universitat de Illes Balears, Departament de Biologia, Unitat de Fisiologia Vegetal, Illes Balears, Spain.
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Celaya RB, Liscum E. Phototropins and Associated Signaling: Providing the Power of Movement in Higher Plants¶. Photochem Photobiol 2007. [DOI: 10.1111/j.1751-1097.2005.tb01524.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Chen IC, Huang IC, Liu MJ, Wang ZG, Chung SS, Hsieh HL. Glutathione S-transferase interacting with far-red insensitive 219 is involved in phytochrome A-mediated signaling in Arabidopsis. PLANT PHYSIOLOGY 2007; 143:1189-202. [PMID: 17220357 PMCID: PMC1820923 DOI: 10.1104/pp.106.094185] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2006] [Accepted: 01/01/2007] [Indexed: 05/13/2023]
Abstract
Far-red (FR) insensitive 219 (FIN219) was previously shown to be involved in phytochrome A-mediated FR light signaling. To further understand its function and regulatory relation with other light-signaling components, a yeast two-hybrid approach was used to isolate FIN219-interacting partners. Here, we demonstrate that FIN219-interacting protein 1 (FIP1) interacts with FIN219 in vitro and in vivo and is composed of 217 amino acids that belong to the tau class of the large glutathione S-transferase gene family. FIP1 was further shown to have glutathione S-transferase activity. The gain of function and partial loss of function of FIP1 resulted in a hyposensitive hypocotyl phenotype under continuous FR (cFR) light and a delayed flowering phenotype under long-day conditions, which suggests that FIP1 may exist in a complex to function in the regulation of Arabidopsis (Arabidopsis thaliana) development. In addition, FIP1 mRNA was down-regulated in the suppressor of phytochrome A-105 1 mutant and differentially expressed in constitutive photomorphogenic 1-4 (cop1-4) and cop1-5 mutants under cFR. Intriguingly, FIP1 expression was up-regulated in the fin219 mutant under all light conditions, except cFR. Furthermore, promoter activity assays revealed that FIP1 expression was light dependent, mainly associated with vascular tissues, and developmentally regulated. Subcellular localization studies revealed that the beta-glucuronidase-FIP1 fusion protein was localized in the nucleus and cytoplasm. Taken together, these data indicate that FIP1 may interact with FIN219 to regulate cell elongation and flowering in response to light.
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Affiliation(s)
- Ing-Chien Chen
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei 106, Taiwan
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Tepperman JM, Hwang YS, Quail PH. phyA dominates in transduction of red-light signals to rapidly responding genes at the initiation of Arabidopsis seedling de-etiolation. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2006; 48:728-42. [PMID: 17076805 DOI: 10.1111/j.1365-313x.2006.02914.x] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Contrary to expectations based on the visible phenotypic behavior of seedlings undergoing de-etiolation in response to continuous red light (Rc), previous gene expression profiling showed that one or more of the five-membered phytochrome (phy) family of Arabidopsis, other than phyB, is predominantly responsible for transducing the Rc signals to light-responsive genes. To begin to identify which phys are involved, and to define potential primary targets of phy signaling, we have examined the genome-wide expression profiles of genes responding to Rc within 1 h (early response genes) of initial exposure of dark-grown wild-type, phyA, phyB and phyAphyB double mutant seedlings to the light signal. The data show that phyA has a quantitatively dominant role in Rc-induced expression of these early response genes, that phyB has minimal detectable regulatory activity in the presence of phyA, but assumes a quantitatively larger role in its absence, and that phyA and phyB combined are responsible for the full extent of Rc responsiveness of 96% of these genes. No evidence was obtained of a significant role for the remaining family members, phyC, phyD or phyE, in this process. In striking contrast, Rc-imposed repression of early response gene expression remains quantitatively strong in the phyAphyB double mutant, as well as the monogenic mutants, suggesting a significant role for one or more of the other three phys in this response. Examination of the established or predicted functional roles of the early response genes indicates that genes encoding transcription factors represent the largest single category, at a frequency three times their prevalence genome-wide. This dominance is particularly striking among those genes responding most robustly to the Rc signal, where >50% are classified as involved in transcriptional regulation, suggesting that these may have potentially primary regulatory roles at the interface between phy signaling and the light-responsive transcriptional network. Integration of the present data with those of a previous genome-scale transcriptional analysis of a pif3 mutant, suggests a complex network involving perception and transduction of inductive Rc signals by both phyA and phyB through both PIF3 and other undefined signaling partners to early response genes.
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Affiliation(s)
- James M Tepperman
- Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA
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Khanna R, Shen Y, Toledo-Ortiz G, Kikis EA, Johannesson H, Hwang YS, Quail PH. Functional profiling reveals that only a small number of phytochrome-regulated early-response genes in Arabidopsis are necessary for optimal deetiolation. THE PLANT CELL 2006; 18:2157-71. [PMID: 16891401 PMCID: PMC1560915 DOI: 10.1105/tpc.106.042200] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
In previous time-resolved microarray-based expression profiling, we identified 32 genes encoding putative transcription factors, signaling components, and unknown proteins that are rapidly and robustly induced by phytochrome (phy)-mediated light signals. Postulating that they are the most likely to be direct targets of phy signaling and to function in the primary phy regulatory circuitry, we examined the impact of targeted mutations in these genes on the phy-induced seedling deetiolation process in Arabidopsis thaliana. Using light-imposed concomitant inhibition of hypocotyl and stimulation of cotyledon growth as diagnostic criteria for normal deetiolation, we identified three major mutant response categories. Seven (22%) lines displayed statistically significant, reciprocal, aberrant photoresponsiveness in the two organs, suggesting disruption of normal deetiolation; 13 (41%) lines displayed significant defects either unidirectionally in both organs or in hypocotyls only, suggesting global effects not directly related to photomorphogenic signaling; and 12 (37%) lines displayed no significant difference in photoresponsiveness from the wild type. Potential reasons for the high proportion of rapidly light-responsive genes apparently unnecessary for the deetiolation phenotype are discussed. One of the seven disrupted genes displaying a significant mutant phenotype, the basic helix-loop-helix factor-encoding PHYTOCHROME-INTERACTING FACTOR3-LIKE1 gene, was found to be necessary for rapid light-induced expression of the photomorphogenesis- and circadian-related PSEUDO-RESPONSE REGULATOR9 gene, indicating a regulatory function in the early phy-induced transcriptional network.
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Affiliation(s)
- Rajnish Khanna
- Department of Plant and Microbial Biology, University of California, Berkeley, 94720, USA
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Celaya RB, Liscum E. Phototropins and Associated Signaling: Providing the Power of Movement in Higher Plants¶. Photochem Photobiol 2005. [DOI: 10.1562/2004-08-22-ir-282.1] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Stone BB, Esmon CA, Liscum E. Phototropins, other photoreceptors, and associated signaling: the lead and supporting cast in the control of plant movement responses. Curr Top Dev Biol 2005; 66:215-38. [PMID: 15797455 DOI: 10.1016/s0070-2153(05)66007-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Bethany B Stone
- University of Missouri-Columbia, Columbia, Missouri 65211, USA
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Boccalandro HE, Rossi MC, Saijo Y, Deng XW, Casal JJ. Promotion of photomorphogenesis by COP1. PLANT MOLECULAR BIOLOGY 2004; 56:905-15. [PMID: 15821989 DOI: 10.1007/s11103-004-5919-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2004] [Accepted: 11/06/2004] [Indexed: 05/05/2023]
Abstract
CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) represses photomorphogenesis in darkness by targeting nuclear-localized transcription factors to proteasome-mediated degradation. Upon light exposure, COP1 migrates to the cytosol allowing photomorphogenesis to proceed but the residual nuclear pool down-regulates light signaling mediated by phytochrome A. Here we show that weak alleles of cop1 exhibit reverse photomorphogenic responses i.e. reduced rather than enhanced cotyledon unfolding under red light compared to darkness. Conversely, COP1 overexpressors which de-etiolate poorly under blue or far-red light, showed enhanced photomorphogenesis under red light. The positive relationship between COP1 and photomorphogenic response required phytochrome B. Thus, genetic manipulation of COP1 levels differentially affects phytochrome A- compared to phytochrome B-mediated responses. We hypothesize that COP1 could be involved in degradation of negative regulators of photomorphogenesis or in transcriptional activation, as observed for some E3 ligases in mammalian development.
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Affiliation(s)
- Hernán E Boccalandro
- I.F.E.V.A., Faculty of Agronomy, University of Buenos Aires, Av. San Martín 4453, 1417, Buenos Aires, Argentina
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