201
|
Yan B, Lv Y, Zhao C, Wang X. Knowing When to Silence: Roles of Polycomb-Group Proteins in SAM Maintenance, Root Development, and Developmental Phase Transition. Int J Mol Sci 2020; 21:E5871. [PMID: 32824274 PMCID: PMC7461556 DOI: 10.3390/ijms21165871] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/06/2020] [Accepted: 08/06/2020] [Indexed: 01/01/2023] Open
Abstract
Polycomb repressive complex 1 (PRC1) and PRC2 are the major complexes composed of polycomb-group (PcG) proteins in plants. PRC2 catalyzes trimethylation of lysine 27 on histone 3 to silence target genes. Like Heterochromatin Protein 1/Terminal Flower 2 (LHP1/TFL2) recognizes and binds to H3K27me3 generated by PRC2 activities and enrolls PRC1 complex to further silence the chromatin through depositing monoubiquitylation of lysine 119 on H2A. Mutations in PcG genes display diverse developmental defects during shoot apical meristem (SAM) maintenance and differentiation, seed development and germination, floral transition, and so on so forth. PcG proteins play essential roles in regulating plant development through repressing gene expression. In this review, we are focusing on recent discovery about the regulatory roles of PcG proteins in SAM maintenance, root development, embryo development to seedling phase transition, and vegetative to reproductive phase transition.
Collapse
Affiliation(s)
| | | | | | - Xiaoxue Wang
- Rice Research Institute, Shenyang Agricultural University, Shenyang 110866, China; (B.Y.); (Y.L.); (C.Z.)
| |
Collapse
|
202
|
Alternative splicing of flowering time gene FT is associated with halving of time to flowering in coconut. Sci Rep 2020; 10:11640. [PMID: 32669611 PMCID: PMC7363896 DOI: 10.1038/s41598-020-68431-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 06/24/2020] [Indexed: 11/08/2022] Open
Abstract
Coconut palm has two distinct types-"tall" and "dwarf"-which differ morphologically. Tall coconut varieties need 8-10 years to start flowering, while dwarf coconut varieties only require 3-5 years. We compared seedling and reproductive stage transcriptomes for both coconut types to determine potential molecular mechanisms underlying control of flowering time in coconut. Several key genes in the photoperiod pathway were differentially expressed between seedling and reproductive leaf samples in both tall and dwarf coconut. These genes included suppressor of overexpression of constans (SOC1), flowering locus T (FT), and Apetala 1 (AP1). Alternative splicing analysis of genes in the photoperiod pathway further revealed that the FT gene produces different transcripts in tall compared to dwarf coconut. The shorter alternative splice variant of FT [which included a 6 bp deletion, alternative 3' splicing sites (A3SS)] was found to be exclusively present in dwarf coconut varieties but absent in most tall coconut varieties. Our results provide a valuable information resource as well as suggesting a probable mechanism for differentiation of flowering time onset in coconut, providing a target for future breeding work in accelerating time to flowering in this crop species.
Collapse
|
203
|
Li K, Wang J, Qiao L, Zheng R, Ma Y, Chen Y, Hou X, Du Y, Gao J, Liu H. Diversity of Reproductive Phenology Among Subtropical Grasses Is Constrained by Evolution and Climatic Niche. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.00181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
204
|
Evolution and functional diversification of FLOWERING LOCUS T/TERMINAL FLOWER 1 family genes in plants. Semin Cell Dev Biol 2020; 109:20-30. [PMID: 32507412 DOI: 10.1016/j.semcdb.2020.05.007] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 05/11/2020] [Accepted: 05/11/2020] [Indexed: 01/01/2023]
Abstract
Plant growth and development, particularly the induction of flowering, are tightly controlled by key regulators in response to endogenous and environmental cues. The FLOWERING LOCUS T (FT)/TERMINAL FLOWER 1 (TFL1) family of phosphatidylethanolamine-binding protein (PEBP) genes is central to plant development, especially the regulation of flowering time and plant architecture. FT, the long-sought florigen, promotes flowering and TFL1 represses flowering. The balance between FT and TFL1 modulates plant architecture by switching the meristem from indeterminate to determinate growth, or vice versa. Recent studies in a broad range of plant species demonstrated that, in addition to their roles in flowering time and plant architecture, FT/TFL1 family genes participate in diverse aspects of plant development, such as bamboo seed germination and potato tuber formation. In this review, we briefly summarize the evolution of the FT/TFL1 family and highlight recent findings on their conserved and divergent functions in different species.
Collapse
|
205
|
Eguen T, Ariza JG, Brambilla V, Sun B, Bhati KK, Fornara F, Wenkel S. Control of flowering in rice through synthetic microProteins. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2020; 62:730-736. [PMID: 31478602 DOI: 10.1111/jipb.12865] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 08/17/2019] [Indexed: 06/10/2023]
Abstract
Photoperiod-dependent flowering in rice is regulated by HEADING DATE 1 (Hd1), which acts as both an activator and repressor of flowering in a daylength-dependent manner. To investigate the use of microProteins as a tool to modify rice sensitivity to the photoperiod, we designed a synthetic Hd1 microProtein (Hd1miP) capable of interacting with Hd1 protein, and overexpressed it in rice. Transgenic OX-Hd1miP plants flowered significantly earlier than wild type plants when grown in non-inductive long day conditions. Our results show the potential of microProteins to serve as powerful tools for modulating crop traits and unraveling protein function.
Collapse
Affiliation(s)
- Tenai Eguen
- Copenhagen Plant Science Centre, University of Copenhagen, 1871, Frederiksberg C, Denmark
- Department of Plant and Environmental Sciences, University of Copenhagen, 1871, Frederiksberg C, Denmark
| | - Jorge Gomez Ariza
- Department of Biosciences, Università degli Studi di Milano, 20133, Milano, Italy
| | - Vittoria Brambilla
- Department of Biosciences, Università degli Studi di Milano, 20133, Milano, Italy
| | - Bin Sun
- Copenhagen Plant Science Centre, University of Copenhagen, 1871, Frederiksberg C, Denmark
- Department of Plant and Environmental Sciences, University of Copenhagen, 1871, Frederiksberg C, Denmark
| | - Kaushal Kumar Bhati
- Copenhagen Plant Science Centre, University of Copenhagen, 1871, Frederiksberg C, Denmark
- Department of Plant and Environmental Sciences, University of Copenhagen, 1871, Frederiksberg C, Denmark
| | - Fabio Fornara
- Department of Biosciences, Università degli Studi di Milano, 20133, Milano, Italy
| | - Stephan Wenkel
- Copenhagen Plant Science Centre, University of Copenhagen, 1871, Frederiksberg C, Denmark
- Department of Plant and Environmental Sciences, University of Copenhagen, 1871, Frederiksberg C, Denmark
| |
Collapse
|
206
|
Kinoshita A, Richter R. Genetic and molecular basis of floral induction in Arabidopsis thaliana. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:2490-2504. [PMID: 32067033 PMCID: PMC7210760 DOI: 10.1093/jxb/eraa057] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Accepted: 02/03/2020] [Indexed: 05/18/2023]
Abstract
Many plants synchronize their life cycles in response to changing seasons and initiate flowering under favourable environmental conditions to ensure reproductive success. To confer a robust seasonal response, plants use diverse genetic programmes that integrate environmental and endogenous cues and converge on central floral regulatory hubs. Technological advances have allowed us to understand these complex processes more completely. Here, we review recent progress in our understanding of genetic and molecular mechanisms that control flowering in Arabidopsis thaliana.
Collapse
Affiliation(s)
- Atsuko Kinoshita
- Department of Biological Sciences, Tokyo Metropolitan University, Tokyo, Japan
- Correspondence: or
| | - René Richter
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Melbourne, Australia
- Correspondence: or
| |
Collapse
|
207
|
Identification and characterization of PEBP family genes reveal CcFT8 a probable candidate for photoperiod insensitivity in C. cajan. 3 Biotech 2020; 10:194. [PMID: 32274290 DOI: 10.1007/s13205-020-02180-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 03/23/2020] [Indexed: 01/24/2023] Open
Abstract
Understanding the molecular mechanism underlying photoperiod sensitivity will play a crucial role in extending the cropping area of Cajanus cajan, a photoperiod sensitive major grain legume of India and Africa. In flowering plants, Flowering locus T (FT) gene is involved in the production of florigen molecule which is essential for induction of flowering, influenced largely by the duration of photoperiod. To understand the structural and regulatory nature of this gene, a genome-wide survey was carried out, revealing the presence of 13 PEBP (FT) family genes in C. cajan. Based on the gene expression profiling of 13 PEBP genes across the 30 tissues of C. cajan, CcFT6 and CcFT8 were found to be probable Flowering locus T genes responsible for the production of florigen as both of them showed expression in reproductive leaf. Expression analysis in photoperiod sensitive, MAL3 genotype revealed that CcFT6 is upregulated under SD. However, in photoperiod insensitive genotype (ICP20338) CcFT6 and CcFT8 were upregulated in SD and LD, respectively. Hence, in ICP20338 under SD, flowering induction occurs with the involvement of CcFT6 while under LD, flowering induction seems to be associated with the expression of CcFT8. CcFT6 was found to be expressed only under favourable photoperiodic condition (SD) in both MAL3 and ICP20338 and may be regulated through a photoperiod dependent pathway. The presence of additional florigen producing gene, CcFT8 in ICP20338 which has the ability to flower in a photoperiod independent manner under LD conditions might provide some clues on its photoperiod insensitive nature. This study will provide a detailed characterization of the genes involved in photoperiodic regulation of flowering in C. cajan.
Collapse
|
208
|
Xiong R, Liu C, Xu M, Wei SS, Huang JQ, Tang H. Transcriptomic analysis of flower induction for long-day pitaya by supplementary lighting in short-day winter season. BMC Genomics 2020; 21:329. [PMID: 32349680 PMCID: PMC7191803 DOI: 10.1186/s12864-020-6726-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Accepted: 04/12/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Pitayas are currently attracting considerable interest as a tropical fruit with numerous health benefits. However, as a long-day plant, pitaya plants cannot flower in the winter season from November to April in Hainan, China. To harvest pitayas with high economic value in the winter season, it is necessary to provide supplementary lighting at night to induce flowering. To further explore the molecular regulating mechanisms of flower induction in pitaya plants exposed to supplementary lighting, we used de novo RNA sequencing-based transcriptomic analysis for four stages of pitaya plants subjected to light induction. RESULTS We assembled 68,113 unigenes in total, comprising 29,782 unigenes with functional annotations in the NR database, 20,716 annotations in SwissProt, 18,088 annotations in KOG, and 11,059 annotations in KEGG. Comparisons between different samples revealed different numbers of significantly differentially expressed genes (DEGs). A number of DEGs involved in energy metabolism-related processes and plant hormone signaling were detected. Moreover, we identified many CONSTANS-LIKE, FLOWERING LOCUS T, and other DEGs involved in the direct regulation of flowering including CDF and TCP, which function as typical transcription factor genes in the flowering process. At the transcriptomic level, we verified 13 DEGs with different functions in the time-course response to light-induced flowering by quantitative reverse-transcription PCR analysis. CONCLUSIONS The identified DEGs may include some key genes controlling the pitaya floral-induction network, the flower induction and development is very complicated, and it involves photoperiod perception and different phytohormone signaling. These findings will increase our understanding to the molecular mechanism of floral regulation of long-day pitaya plants in short-day winter season induced by supplementary lighting.
Collapse
Affiliation(s)
- Rui Xiong
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, No. 58 Renmin Avenue, Haikou, 570228, Hainan, P. R. China
| | - Chengli Liu
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, No. 58 Renmin Avenue, Haikou, 570228, Hainan, P. R. China
| | - Min Xu
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, No. 58 Renmin Avenue, Haikou, 570228, Hainan, P. R. China
| | - Shuang-Shuang Wei
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, No. 58 Renmin Avenue, Haikou, 570228, Hainan, P. R. China
| | - Jia-Quan Huang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, No. 58 Renmin Avenue, Haikou, 570228, Hainan, P. R. China
| | - Hua Tang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, No. 58 Renmin Avenue, Haikou, 570228, Hainan, P. R. China.
| |
Collapse
|
209
|
Dynamic effects of interacting genes underlying rice flowering-time phenotypic plasticity and global adaptation. Genome Res 2020; 30:673-683. [PMID: 32299830 PMCID: PMC7263186 DOI: 10.1101/gr.255703.119] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 04/15/2020] [Indexed: 12/21/2022]
Abstract
The phenotypic variation of living organisms is shaped by genetics, environment, and their interaction. Understanding phenotypic plasticity under natural conditions is hindered by the apparently complex environment and the interacting genes and pathways. Herein, we report findings from the dissection of rice flowering-time plasticity in a genetic mapping population grown in natural long-day field environments. Genetic loci harboring four genes originally discovered for their photoperiodic effects (Hd1, Hd2, Hd5, and Hd6) were found to differentially respond to temperature at the early growth stage to jointly determine flowering time. The effects of these plasticity genes were revealed with multiple reaction norms along the temperature gradient. By coupling genomic selection and the environmental index, accurate performance predictions were obtained. Next, we examined the allelic variation in the four flowering-time genes across the diverse accessions from the 3000 Rice Genomes Project and constructed haplotypes at both individual-gene and multigene levels. The geographic distribution of haplotypes revealed their preferential adaptation to different temperature zones. Regions with lower temperatures were dominated by haplotypes sensitive to temperature changes, whereas the equatorial region had a majority of haplotypes that are less responsive to temperature. By integrating knowledge from genomics, gene cloning and functional characterization, and environment quantification, we propose a conceptual model with multiple levels of reaction norms to help bridge the gaps among individual gene discovery, field-level phenotypic plasticity, and genomic diversity and adaptation.
Collapse
|
210
|
Zhao S, Wei Y, Pang H, Xu J, Li Y, Zhang H, Zhang J, Zhang Y. Genome-wide identification of the PEBP genes in pears and the putative role of PbFT in flower bud differentiation. PeerJ 2020; 8:e8928. [PMID: 32296611 PMCID: PMC7151754 DOI: 10.7717/peerj.8928] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 03/17/2020] [Indexed: 11/20/2022] Open
Abstract
Although Phosphatidylethanolamine-binding protein (PEBP) genes have been identified in several plants, little is known about PEBP genes in pears. In this study, a total of 24 PEBP genes were identified, in which 10, 5 and 9 were from Pyrus bretschneideri genome, Pyrus communis genome and Pyrus betuleafolia genome, respectively. Subsequently, gene structure, phylogenetic relationship, chromosomal localization, promoter regions, collinearity and expression were determined with these PEBP genes. It was found that only PbFT from PEBP genes of P. bretschneideri was relatively highly expressed in leaves during flower bud differentiation. Whereas, expression patterns of TFL1 homologues, gene23124 and gene16540, were different from PbFT in buds. The expression pattern and the treatment of reduction day-length indicated that the expression of PbFT in leaves were regulated by day-length and circadian clock. Additionally, the phenotype of transgenic Arabidopsis suggested that PbFT played a role in not only promoting flower bud differentiation, but also regulating the balance between vegetative and reproductive growth. These results may provide important information for further understanding of the evolution and function of PEBP genes in pears.
Collapse
Affiliation(s)
- Shuliang Zhao
- College of Horticulture, Hebei Agricultural University, Baoding, Hebei, China
| | - Yarui Wei
- College of Horticulture, Hebei Agricultural University, Baoding, Hebei, China
| | - Hongguang Pang
- College of Horticulture, Hebei Agricultural University, Baoding, Hebei, China
| | - Jianfeng Xu
- College of Horticulture, Hebei Agricultural University, Baoding, Hebei, China
| | - Yingli Li
- College of Horticulture, Hebei Agricultural University, Baoding, Hebei, China
| | - Haixia Zhang
- College of Horticulture, Hebei Agricultural University, Baoding, Hebei, China
| | - Jianguang Zhang
- College of Horticulture, Hebei Agricultural University, Baoding, Hebei, China
| | - Yuxing Zhang
- College of Horticulture, Hebei Agricultural University, Baoding, Hebei, China
| |
Collapse
|
211
|
Lorenzo CD, García‐Gagliardi P, Antonietti MS, Sánchez‐Lamas M, Mancini E, Dezar CA, Vazquez M, Watson G, Yanovsky MJ, Cerdán PD. Improvement of alfalfa forage quality and management through the down-regulation of MsFTa1. PLANT BIOTECHNOLOGY JOURNAL 2020; 18:944-954. [PMID: 31536663 PMCID: PMC7061867 DOI: 10.1111/pbi.13258] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 09/06/2019] [Accepted: 09/16/2019] [Indexed: 05/02/2023]
Abstract
Alfalfa (Medicago sativa L.) is one of the most important forage crops worldwide. As a perennial, alfalfa is cut several times each year. Farmers face a dilemma: if cut earlier, forage nutritive value is much higher but regrowth is affected and the longevity of the stand is severely compromised. On the other hand, if alfalfa is cut later at full flower, stands persist longer and more biomass may be harvested, but the nutritive value diminishes. Alfalfa is a strict long-day plant. We reasoned that by manipulating the response to photoperiod, we could delay flowering to improve forage quality and widen each harvesting window, facilitating management. With this aim, we functionally characterized the FLOWERING LOCUS T family of genes, represented by five members: MsFTa1, MsFTa2, MsFTb1, MsFTb2 and MsFTc. The expression of MsFTa1 correlated with photoperiodic flowering and its down-regulation led to severe delayed flowering. Altogether, with late flowering, low expression of MsFTa1 led to changes in plant architecture resulting in increased leaf to stem biomass ratios and forage digestibility. By manipulating photoperiodic flowering, we were able to improve the quality of alfalfa forage and management, which may allow farmers to cut alfalfa of high nutritive value without compromising stand persistence.
Collapse
Affiliation(s)
| | | | | | | | | | - Carlos A. Dezar
- Instituto de Agrobiotecnología de Rosario (INDEAR)CONICETRosarioArgentina
| | - Martin Vazquez
- Instituto de Agrobiotecnología de Rosario (INDEAR)CONICETRosarioArgentina
| | - Gerónimo Watson
- Instituto de Agrobiotecnología de Rosario (INDEAR)CONICETRosarioArgentina
| | | | - Pablo D. Cerdán
- Fundación Instituto LeloirIIBBA‐CONICETBuenos AiresArgentina
- Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina
| |
Collapse
|
212
|
Chen L, Cai Y, Qu M, Wang L, Sun H, Jiang B, Wu T, Liu L, Sun S, Wu C, Yao W, Yuan S, Han T, Hou W. Soybean adaption to high-latitude regions is associated with natural variations of GmFT2b, an ortholog of FLOWERING LOCUS T. PLANT, CELL & ENVIRONMENT 2020; 43:934-944. [PMID: 31981430 PMCID: PMC7154755 DOI: 10.1111/pce.13695] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/25/2019] [Accepted: 12/01/2019] [Indexed: 05/03/2023]
Abstract
Day length has an important influence on flowering and growth habit in many plant species. In crops such as soybean, photoperiod sensitivity determines the geographical range over which a given cultivar can grow and flower. The soybean genome contains ~10 genes homologous to FT, a central regulator of flowering from Arabidopsis thaliana. However, the precise roles of these soybean FTs are not clearly. Here we show that one such gene, GmFT2b, promotes flowering under long-days (LDs). Overexpression of GmFT2b upregulates expression of flowering-related genes which are important in regulating flowering time. We propose a 'weight' model for soybean flowering under short-day (SD) and LD conditions. Furthermore, we examine GmFT2b sequences in 195 soybean cultivars, as well as flowering phenotypes, geographical distributions and maturity groups. We found that Hap3, a major GmFT2b haplotype, is associated with significantly earlier flowering at higher latitudes. We anticipate our assay to provide important resources for the genetic improvement of soybean, including new germplasm for soybean breeding, and also increase our understanding of functional diversity in the soybean FT gene family.
Collapse
Affiliation(s)
- Li Chen
- National Center for Transgenic Research in PlantsInstitute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Yupeng Cai
- National Center for Transgenic Research in PlantsInstitute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Mengnan Qu
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Liwei Wang
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Hongbo Sun
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Bingjun Jiang
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Tingting Wu
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Luping Liu
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Shi Sun
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Cunxiang Wu
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Weiwei Yao
- National Center for Transgenic Research in PlantsInstitute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Shan Yuan
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Tianfu Han
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| | - Wensheng Hou
- National Center for Transgenic Research in PlantsInstitute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
- Ministry of Agriculture Key Laboratory of Soybean Biology (Beijing)Institute of Crop Sciences, Chinese Academy of Agricultural SciencesBeijingChina
| |
Collapse
|
213
|
Oda A, Higuchi Y, Hisamatsu T. Constitutive expression of CsGI alters critical night length for flowering by changing the photo-sensitive phase of anti-florigen induction in chrysanthemum. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 293:110417. [PMID: 32081265 DOI: 10.1016/j.plantsci.2020.110417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/15/2020] [Accepted: 01/18/2020] [Indexed: 05/27/2023]
Abstract
Chrysanthemum is a typical short day (SD) flowering plant that requires a longer night period than a critical minimum duration to successfully flower. We identified FLOWERING LOCUS T-LIKE 3 (FTL3) and ANTI-FLORIGENIC FT/TFL1 FAMILY PROTEIN (AFT) as a florigen and antiflorigen, respectively, in a wild diploid chrysanthemum (Chrysanthemum seticuspe). Expression of the genes that produce these proteins, CsFTL3 and CsAFT, is induced in the leaves under SD or a noninductive photoperiod, respectively, and the balance between them determines the progression of floral transition and anthesis. However, how CsFTL3 and CsAFT are regulated to define the critical night length for flowering in chrysanthemum is unclear. In this study, we focused on the circadian clock-related gene GIGANTEA (GI) of C. seticuspe (CsGI) and generated transgenic C. seticuspe plants overexpressing CsGI (CsGI-OX). Under a strongly inductive SD (8 L/16D) photoperiod, floral transition occurred at almost the same time in both wild-type and CsGI-OX plants. However, under a moderately inductive (12 L/12D) photoperiod, the floral transition in CsGI-OX plants was strongly suppressed, suggesting that the critical night length for flowering was lengthened for CsGI-OX plants. Under the 12 L/12D photoperiod, CsAFT was upregulated in CsGI-OX plants. Giving a night break (NB) 10 h after dusk was the most effective time to inhibit flowering in wild-type plants, while the most effective time for NB was extended to dawn (12 and 14 h after dusk) in CsGI-OX plants. In wild-type plants, a red-light pulse delivered 8 or 10 h after dusk induced maximal CsAFT expression, but the length of the time period over which CsAFT could be induced by red light was extended until subjective dawn in CsGI-OX plants. Therefore, CsGI-OX plants required a longer dark period to maintain lower levels of CsAFT, and their critical night length for flowering was thus lengthened. These results suggested that CsGI has an important role in the control of photoperiodic flowering through shaping the gate for CsAFT induction by light in chrysanthemum.
Collapse
Affiliation(s)
- Atsushi Oda
- Institute of Vegetable and Floriculture Science, National Agriculture and Food Research Organization (NARO), Kannondai, Tsukuba, Ibaraki, 305-8517, Japan.
| | - Yohei Higuchi
- Institute of Vegetable and Floriculture Science, National Agriculture and Food Research Organization (NARO), Kannondai, Tsukuba, Ibaraki, 305-8517, Japan; Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
| | - Tamotsu Hisamatsu
- Institute of Vegetable and Floriculture Science, National Agriculture and Food Research Organization (NARO), Kannondai, Tsukuba, Ibaraki, 305-8517, Japan
| |
Collapse
|
214
|
Cao S, Luo X, Xie L, Gao C, Wang D, Holt BF, Lin H, Chu C, Xia X. The florigen interactor BdES43 represses flowering in the model temperate grass Brachypodium distachyon. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 102:262-275. [PMID: 31782581 DOI: 10.1111/tpj.14622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 10/25/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
FLOWERING LOCUS T (FT) protein, physiologically florigen, has been identified as a system integrator of numerous flowering time pathways in many studies, and its homologs are found throughout the plant lineage. It is important to uncover how precisely florigenic homologs contribute to flowering initiation and how these factors interact genetically. Here we dissected the function of Brachypodium FT orthologs BdFTL1 and BdFTL2 using overexpression and gene-editing experiments. Transgenic assays showed that both BdFTL1 and BdFTL2 could promote flowering, whereas BdFTL2 was essential for flowering initiation. Notably, BdFTL1 is subject to alternative splicing (AS), and its transcriptional level and AS are significantly affected by BdFTL2. Additionally, BdFTL2 could bind with the PHD-containing protein BdES43, an H3K4me3 reader. Furthermore, BdES43 was antagonistic to BdFTL2 in flowering initiation in a transcription-dependent manner and significantly affected BdFTL1 expression. BdFTL2, BdES43 and H3K4me3 also had highly similar distribution patterns within the BdFTL1 locus, indicating their interplay in regulating target genes. Taken together, florigen BdFTL2 functions as a potential epigenetic effector of BdFTL1 by interacting with a BdES43-H3K4me3 complex. This finding provides an additional insight for the regulatory mechanism underlying the multifaceted roles of florigen.
Collapse
Affiliation(s)
- Shuanghe Cao
- National Wheat Improvement Center, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
| | - Xumei Luo
- National Wheat Improvement Center, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
| | - Li Xie
- National Wheat Improvement Center, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
| | - Caixia Gao
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences (CAS), No. 1 West Beichen Road, Chaoyang District, Beijing, 100101, China
| | - Daowen Wang
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences (CAS), No. 1 West Beichen Road, Chaoyang District, Beijing, 100101, China
| | - Ben F Holt
- Department of Microbiology and Plant Biology, University of Oklahoma, 770 Van Vleet Oval, Norman, OK, 73019, USA
| | - Hao Lin
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Haidian District, Beijing, 100081, China
| | - Chengcai Chu
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences (CAS), No. 1 West Beichen Road, Chaoyang District, Beijing, 100101, China
| | - Xianchun Xia
- National Wheat Improvement Center, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
| |
Collapse
|
215
|
Genome-Wide Transcriptomic Analysis Reveals a Regulatory Network of Oxidative Stress-Induced Flowering Signals Produced in Litchi Leaves. Genes (Basel) 2020; 11:genes11030324. [PMID: 32197528 PMCID: PMC7140818 DOI: 10.3390/genes11030324] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 03/11/2020] [Accepted: 03/11/2020] [Indexed: 11/17/2022] Open
Abstract
Litchi is an important subtropical fruit tree that requires an appropriately low temperature to trigger floral initiation. Our previous studies have shown that reactive oxygen species (ROS) are involved in litchi flowering. To identify oxidative stress-induced flowering related genes in leaves, ‘Nuomici’ potted trees were grown at medium low-temperature conditions (18/13 °C for day/night, medium-temperature). The trees were treated with the ROS generator methyl viologen dichloride hydrate (MV) as the MV-generated ROS treatment (MM, medium-temperature plus MV) and water as the control treatment (M, medium-temperature plus water). Sixteen RNA-sequencing libraries were constructed, and each library generated more than 5,000,000 clean reads. A total of 517 differentially expressed genes (DEGs) were obtained. Among those DEGs, plant hormone biosynthesis and signal transduction genes, ROS-specific transcription factors, such as AP2/ERF and WRKY genes, stress response genes, and flowering-related genes FLOWERING LOCUS T1 (FT1) and FLOWERING LOCUS T2 (FT2) were significantly enriched. Then, as a confirmatory experiment, the potted trees were uniformly sprayed with MV, N,N’-dimethylthiourea (DMTU, ROS scavenger) plus MV, and water at medium-temperature. The results showed that the MV-generated ROS promoted flowering and changed related gene expression, but these effects were repressed by DMTU treatment. The results of our studies indicate that ROS could promote flowering and partly bypass chilling for litchi flowering.
Collapse
|
216
|
Zhu M, Yan B, Hu Y, Cui Z, Wang X. Genome-wide identification and phylogenetic analysis of rice FTIP gene family. Genomics 2020; 112:3803-3814. [PMID: 32145381 DOI: 10.1016/j.ygeno.2020.03.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Revised: 02/16/2020] [Accepted: 03/03/2020] [Indexed: 01/14/2023]
Abstract
FT-INTERACTING PROTEIN (FTIP) gene family in rice are the members of multiple C2 domain and transmembrane region proteins (MCTPs). There are many homologs of OsFTIPs in plants; however, the bioinformatics of them remains unclear. In the studies, 13 OsFTIP genes are identified in rice. OsFTIPs are unevenly located in 12 chromosomes. The OsFTIPs are phylogenetically divided into three clades. Cis-elements respond to abiotic stress, light, and hormones are found in the promoter region of OsFTIPs which are induced by the stimuli. All OsFTIPs are expressed with different profiles. Syntenic analysis of 128 OsFTIPs and FTIP-like homologs reveals that various number of gene pairs are identified between rice and other species. The 128 FTIP-like homologs are divided into six groups which fall into three classes. Ten motifs are shared by most OsFTIPs and their homologs. The studies provide a theoretical basis for further elucidating the functions of OsFTIP gene family.
Collapse
Affiliation(s)
- Mo Zhu
- Rice Research Institute, Shenyang Agricultural University, Shenyang 110866, China.
| | - Bowen Yan
- Rice Research Institute, Shenyang Agricultural University, Shenyang 110866, China.
| | - Yanjuan Hu
- Rice Research Institute, Shenyang Agricultural University, Shenyang 110866, China.
| | - Zhibo Cui
- Rice Research Institute, Shenyang Agricultural University, Shenyang 110866, China.
| | - Xiaoxue Wang
- Rice Research Institute, Shenyang Agricultural University, Shenyang 110866, China.
| |
Collapse
|
217
|
Sakuma S, Schnurbusch T. Of floral fortune: tinkering with the grain yield potential of cereal crops. THE NEW PHYTOLOGIST 2020; 225:1873-1882. [PMID: 31509613 DOI: 10.1111/nph.16189] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 08/28/2019] [Indexed: 05/19/2023]
Abstract
Enhancing the yield potential and stability of small-grain cereals, such as wheat (Triticum sp.), rice (Oryza sativa), and barley (Hordeum vulgare), is a priority for global food security. Over the last several decades, plant breeders have increased grain yield mainly by increasing the number of grains produced in each inflorescence. This trait is determined by the number of spikelets per spike and the number of fertile florets per spikelet. Recent genetic and genomic advances in cereal grass species have identified the molecular determinants of grain number and facilitated the exchange of information across genera. In this review, we focus on the genetic basis of inflorescence architecture in Triticeae crops, highlighting recent insights that have helped to improve grain yield by, for example, reducing the preprogrammed abortion of floral organs. The accumulating information on inflorescence development can be harnessed to enhance grain yield by comparative trait reconstruction and rational design to boost the yield potential of grain crops.
Collapse
Affiliation(s)
- Shun Sakuma
- Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan
| | - Thorsten Schnurbusch
- Leibniz Institute of Plant Genetics and Crop Plant Research, Gatersleben, 06466, Germany
- Faculty of Natural Sciences III, Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany
| |
Collapse
|
218
|
Andrés F, Kinoshita A, Kalluri N, Fernández V, Falavigna VS, Cruz TMD, Jang S, Chiba Y, Seo M, Mettler-Altmann T, Huettel B, Coupland G. The sugar transporter SWEET10 acts downstream of FLOWERING LOCUS T during floral transition of Arabidopsis thaliana. BMC PLANT BIOLOGY 2020; 20:53. [PMID: 32013867 PMCID: PMC6998834 DOI: 10.1186/s12870-020-2266-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 01/27/2020] [Indexed: 05/19/2023]
Abstract
BACKGROUND Floral transition initiates reproductive development of plants and occurs in response to environmental and endogenous signals. In Arabidopsis thaliana, this process is accelerated by several environmental cues, including exposure to long days. The photoperiod-dependent promotion of flowering involves the transcriptional induction of FLOWERING LOCUS T (FT) in the phloem of the leaf. FT encodes a mobile protein that is transported from the leaves to the shoot apical meristem, where it forms part of a regulatory complex that induces flowering. Whether FT also has biological functions in leaves of wild-type plants remains unclear. RESULTS In order to address this issue, we first studied the leaf transcriptomic changes associated with FT overexpression in the companion cells of the phloem. We found that FT induces the transcription of SWEET10, which encodes a bidirectional sucrose transporter, specifically in the leaf veins. Moreover, SWEET10 is transcriptionally activated by long photoperiods, and this activation depends on FT and one of its earliest target genes SUPPRESSOR OF CONSTANS OVEREXPRESSION 1 (SOC1). The ectopic expression of SWEET10 causes early flowering and leads to higher levels of transcription of flowering-time related genes in the shoot apex. CONCLUSIONS Collectively, our results suggest that the FT-signaling pathway activates the transcription of a sucrose uptake/efflux carrier during floral transition, indicating that it alters the metabolism of flowering plants as well as reprogramming the transcription of floral regulators in the shoot meristem.
Collapse
Affiliation(s)
- Fernando Andrés
- Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, 50829 Köln, Germany
- Present Address: UMR AGAP, Univ. Montpellier, INRAE, CIRAD, INSAAE, Montpellier, France
| | - Atsuko Kinoshita
- Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, 50829 Köln, Germany
| | - Naveen Kalluri
- Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, 50829 Köln, Germany
| | - Virginia Fernández
- Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, 50829 Köln, Germany
- Present Address: BPMP, Univ Montpellier, CNRS, INRAE, Montpellier SupAgro, Montpellier, France
| | - Vítor S. Falavigna
- Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, 50829 Köln, Germany
| | - Tiago M. D. Cruz
- Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, 50829 Köln, Germany
| | - Seonghoe Jang
- Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, 50829 Köln, Germany
- Present Address: World Vegetable Center Korea Office (WKO), 100 Nongsaengmyeong-ro, Iseo-myeon, Wanju-gun, Jellabuk-do 55365 Republic of Korea
| | - Yasutaka Chiba
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045 Japan
| | - Mitsunori Seo
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045 Japan
| | - Tabea Mettler-Altmann
- Cluster of Excellence on Plant Sciences and Institute of Plant Biochemistry, Heinrich-Heine University, 40225 Düsseldorf, Germany
| | - Bruno Huettel
- Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, 50829 Köln, Germany
| | - George Coupland
- Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, 50829 Köln, Germany
| |
Collapse
|
219
|
Petit JD, Li ZP, Nicolas WJ, Grison MS, Bayer EM. Dare to change, the dynamics behind plasmodesmata-mediated cell-to-cell communication. CURRENT OPINION IN PLANT BIOLOGY 2020; 53:80-89. [PMID: 31805513 DOI: 10.1016/j.pbi.2019.10.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 10/18/2019] [Accepted: 10/21/2019] [Indexed: 06/10/2023]
Abstract
Plasmodesmata pores control the entry and exit of molecules at cell-to-cell boundaries. Hundreds of pores perforate the plant cell wall, connecting cells together and establishing direct cytosolic and membrane continuity. This ability to connect cells in such a way is a hallmark of plant physiology and is thought to have allowed sessile multicellularity in Plantae kingdom. Indeed, plasmodesmata-mediated cell-to-cell signalling is fundamental to many plant-related processes. In fact, there are so many facets of plant biology under the control of plasmodesmata that it is hard to conceive how such tiny structures can do so much. While they provide 'open doors' between cells, they also need to guarantee cellular identities and territories by selectively transporting molecules. Although plasmodesmata operating mode remains difficult to grasp, little by little plant scientists are divulging their secrets. In this review, we highlight novel functions of cell-to-cell signalling and share recent insights into how plasmodesmata structural and molecular signatures confer functional specificity and plasticity to these unique cellular machines.
Collapse
Affiliation(s)
- Jules D Petit
- Laboratoire de Biogenèse Membranaire, UMR5200 CNRS, Université de Bordeaux, Villenave d'Ornon, France; Laboratoire de Biophysique Moléculaire aux Interfaces, TERRA Research Centre, GX ABT, Université de Liège, Gembloux, Belgium
| | - Ziqiang Patrick Li
- Laboratoire de Biogenèse Membranaire, UMR5200 CNRS, Université de Bordeaux, Villenave d'Ornon, France
| | - William J Nicolas
- Laboratoire de Biogenèse Membranaire, UMR5200 CNRS, Université de Bordeaux, Villenave d'Ornon, France
| | - Magali S Grison
- Laboratoire de Biogenèse Membranaire, UMR5200 CNRS, Université de Bordeaux, Villenave d'Ornon, France
| | - Emmanuelle M Bayer
- Laboratoire de Biogenèse Membranaire, UMR5200 CNRS, Université de Bordeaux, Villenave d'Ornon, France.
| |
Collapse
|
220
|
Geng Y, Zhang P, Liu Q, Wei Z, Riaz A, Chachar S, Gu X. Rice homolog of Sin3-associated polypeptide 30, OsSFL1, mediates histone deacetylation to regulate flowering time during short days. PLANT BIOTECHNOLOGY JOURNAL 2020; 18:325-327. [PMID: 31446676 PMCID: PMC6953189 DOI: 10.1111/pbi.13235] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 07/31/2019] [Accepted: 08/05/2019] [Indexed: 05/18/2023]
Affiliation(s)
- Yuke Geng
- Biotechnology Research InstituteChinese Academy of Agricultural ScienceBeijingChina
| | - Pingxian Zhang
- Biotechnology Research InstituteChinese Academy of Agricultural ScienceBeijingChina
| | - Qing Liu
- Biotechnology Research InstituteChinese Academy of Agricultural ScienceBeijingChina
| | - Ziwei Wei
- Biotechnology Research InstituteChinese Academy of Agricultural ScienceBeijingChina
| | - Adeel Riaz
- Biotechnology Research InstituteChinese Academy of Agricultural ScienceBeijingChina
| | - Sadaruddin Chachar
- Biotechnology Research InstituteChinese Academy of Agricultural ScienceBeijingChina
| | - Xiaofeng Gu
- Biotechnology Research InstituteChinese Academy of Agricultural ScienceBeijingChina
| |
Collapse
|
221
|
Ospina-Zapata DA, Madrigal Y, Alzate JF, Pabón-Mora N. Evolution and Expression of Reproductive Transition Regulatory Genes FT/ TFL1 With Emphasis in Selected Neotropical Orchids. FRONTIERS IN PLANT SCIENCE 2020; 11:469. [PMID: 32373149 PMCID: PMC7186885 DOI: 10.3389/fpls.2020.00469] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 03/30/2020] [Indexed: 05/23/2023]
Abstract
Flowering is a rigorously timed and morphologically complex shift in plant development. This change depends on endogenous as well as environmental factors. FLOWERING LOCUS T (FT) integrates several cues from different pathways acting as a flowering promoter. Contrary to the role of FT, its paralog TERMINAL FLOWER 1 (TFL1) delays floral transition. Although FT/TFL1 homologs have been studied in model eudicots and monocots, scarce studies are available in non-model monocots like the Orchidaceae. Orchids are very diverse and their floral complexity is translated into a unique aesthetic display, which appeals the ornamental plant market. Nonetheless, orchid trade faces huge limitations due to their long vegetative phase and intractable indoor flowering seasons. Little is known about the genetic basis that control reproductive transition in orchids and, consequently, manipulating their flowering time remains a challenge. In order to contribute to the understanding of the genetic bases that control flowering in orchids we present here the first broad-scale analysis of FT/TFL1-like genes in monocots with an expanded sampling in Orchidaceae. We also compare expression patterns in three selected species and propose hypotheses on the putative role of these genes in their reproductive transition. Our findings show that FT-like genes are by far more diversified than TFL1-like genes in monocots with six subclades in the former and only one in the latter. Within MonFT1, the comparative protein sequences of MonFT1A and MonFT1B suggest that they could have recruited functional roles in delaying flowering, a role typically assigned to TFL1-like proteins. On the other hand, MonFT2 proteins have retained their canonical motifs and roles in promoting flowering transition. This is also shown by their increased expression levels from the shoot apical meristem (SAM) and leaves to inflorescence meristems (IM) and floral buds (FBs). Finally, TFL1-like genes are retained as single copy and often times are lost. Their loss could be linked to the parallel recruitment of MonFT1A and MonFT1B homologs in delaying flowering and maintaining indeterminacy of the inflorescence meristem. These hypotheses lay the foundation for future functional validation in emerging model orchid species and comparative analyses in orchids with high horticultural potential in the market.
Collapse
Affiliation(s)
- Diego A. Ospina-Zapata
- Facultad de Ciencias Exactas y Naturales, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
| | - Yesenia Madrigal
- Facultad de Ciencias Exactas y Naturales, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
| | - Juan F. Alzate
- Centro Nacional de Secuenciación Genómica, Sede de Investigación Universitaria, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - Natalia Pabón-Mora
- Facultad de Ciencias Exactas y Naturales, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
- *Correspondence: Natalia Pabón-Mora,
| |
Collapse
|
222
|
Matyszczak I, Tominska M, Zakhrabekova S, Dockter C, Hansson M. Analysis of early-flowering genes at barley chromosome 2H expands the repertoire of mutant alleles at the Mat-c locus. PLANT CELL REPORTS 2020; 39:47-61. [PMID: 31541262 PMCID: PMC6960220 DOI: 10.1007/s00299-019-02472-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 09/08/2019] [Indexed: 05/31/2023]
Abstract
Analyses of barley mat-c loss of function mutants reveal deletions, splice-site mutations and nonsynonymous substitutions in a key gene regulating early flowering. Optimal timing of flowering is critical for reproductive success and crop yield improvement. Several major quantitative trait loci for flowering time variation have been identified in barley. In the present study, we analyzed two near-isogenic lines, BW507 and BW508, which were reported to carry two independent early-flowering mutant loci, mat-b.7 and mat-c.19, respectively. Both introgression segments are co-localized in the pericentromeric region of chromosome 2H. We mapped the mutation in BW507 to a 31 Mbp interval on chromosome 2HL and concluded that BW507 has a deletion of Mat-c, which is an ortholog of Antirrhinum majus CENTRORADIALIS (AmCEN) and Arabidopsis thaliana TERMINAL FLOWER1 (AtTFL1). Contrary to previous reports, our data showed that both BW507 and BW508 are Mat-c deficient and none of them are mat-b.7 derived. This work complements previous studies by identifying the uncharacterized mat-c.19 mutant and seven additional mat-c mutants. Moreover, we explored the X-ray structure of AtTFL1 for prediction of the functional effects of nonsynonymous substitutions caused by mutations in Mat-c.
Collapse
Affiliation(s)
- Izabela Matyszczak
- Carlsberg Research Laboratory, J.C. Jacobsens Gade 4, 1799, Copenhagen V, Denmark
| | - Marta Tominska
- Carlsberg Research Laboratory, J.C. Jacobsens Gade 4, 1799, Copenhagen V, Denmark
- Department of Plant Physiology, Faculty of Biology and Environment Protection, University of Silesia, 40-032, Katowice, Poland
| | - Shakhira Zakhrabekova
- Carlsberg Research Laboratory, J.C. Jacobsens Gade 4, 1799, Copenhagen V, Denmark
- Department of Biology, Lund University, Sölvegatan 35, SE-22362, Lund, Sweden
| | - Christoph Dockter
- Carlsberg Research Laboratory, J.C. Jacobsens Gade 4, 1799, Copenhagen V, Denmark
| | - Mats Hansson
- Carlsberg Research Laboratory, J.C. Jacobsens Gade 4, 1799, Copenhagen V, Denmark.
- Department of Biology, Lund University, Sölvegatan 35, SE-22362, Lund, Sweden.
| |
Collapse
|
223
|
Kurokawa K, Kobayashi J, Nemoto K, Nozawa A, Sawasaki T, Nakatsuka T, Yamagishi M. Expression of LhFT1, the Flowering Inducer of Asiatic Hybrid Lily, in the Bulb Scales. FRONTIERS IN PLANT SCIENCE 2020; 11:570915. [PMID: 33304361 PMCID: PMC7693649 DOI: 10.3389/fpls.2020.570915] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 10/19/2020] [Indexed: 05/08/2023]
Abstract
Asiatic hybrid lily leaves emerge from their bulbs in spring, after cold exposure in winter, and the plant then blooms in early summer. We identified four FLOWERING LOCUS T (FT)-like genes, LhFT1, LhFT4, LhFT6, and LhFT8, from an Asiatic hybrid lily. Floral bud differentiation initiated within bulbs before the emergence of leaves. LhFT genes were mainly expressed in bulb scales, and hardly in leaves, in which the FT-like genes of many plants are expressed in response to environmental signals. LhFT1 was expressed in bulb scales after vernalization and was correlated to flower bud initiation in two cultivars with different flowering behaviors. LhFT8 was upregulated in bulb scales after cold exposure and three alternative splicing variants with a nonsense codon were simultaneously expressed. LhFT6 was upregulated in bulb scales after flower initiation, whereas LhFT4 was expressed constantly in all organs. LhFT1 overexpression complemented the late-flowering phenotype of Arabidopsis ft-10, whereas that of LhFT8 did so partly. LhFT4 and LhFT6 overexpression could not complement. Yeast two-hybrid and in vitro analyses showed that the LhFT1 protein interacted with the LhFD protein. LhFT6 and LhFT8 proteins also interacted with LhFD, as observed in AlphaScreen assay. Based on these results, we revealed that LhFT1 acts as a floral activator during floral bud initiation in Asiatic hybrid lilies. However, the biological functions of LhFT4, LhFT6, and LhFT8 remain unclear.
Collapse
Affiliation(s)
- Kana Kurokawa
- Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan
| | - Junya Kobayashi
- Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan
| | | | - Akira Nozawa
- Proteo-Science Center, Ehime University, Matsuyama, Japan
| | | | - Takashi Nakatsuka
- Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan
- Faculty of Agriculture, Shizuoka University, Shizuoka, Japan
- College of Agriculture, Academic Institute, Shizuoka University, Shizuoka, Japan
- *Correspondence: Takashi Nakatsuka,
| | - Masumi Yamagishi
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| |
Collapse
|
224
|
Wang M, Tan Y, Cai C, Zhang B. Identification and expression analysis of phosphatidy ethanolamine-binding protein (PEBP) gene family in cotton. Genomics 2019; 111:1373-1380. [DOI: 10.1016/j.ygeno.2018.09.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 09/04/2018] [Accepted: 09/15/2018] [Indexed: 11/15/2022]
|
225
|
High-Resolution Crystal Structure of Arabidopsis FLOWERING LOCUS T Illuminates Its Phospholipid-Binding Site in Flowering. iScience 2019; 21:577-586. [PMID: 31726375 PMCID: PMC6854094 DOI: 10.1016/j.isci.2019.10.045] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 09/29/2019] [Accepted: 10/23/2019] [Indexed: 11/24/2022] Open
Abstract
Arabidopsis FLOWERING LOCUS T (FT) is a pivotal component of florigen, a long-range mobile flowering signal. Here, we determined the 1.0 Å-resolution crystal structure of FT, a significantly higher-resolution crystal structure of FT than previously reported one (2.6 Å). The present crystallographic studies revealed 4 alternative configurations with the precise location of the surrounding water molecules. Using this structural data, computational docking simulation predicted the putative binding sites for phosphatidylcholine (PC), an endogenous ligand that interacts with FT to modulate flowering time. In vitro reconstitution of the lipid-protein interaction showed that mutations at two of the predicted sites significantly compromised the lipid binding ability of FT. In planta, one of the mutant FT proteins significantly affected FT function in flowering, emphasizing the involvement of PC binding in modulating FT function. Our structural, biochemical, and transgenic analyses reveal the molecular mechanism of PC binding in FT-mediated flowering time control.
Collapse
|
226
|
Bioactive Compounds Involved in the Life Cycle of Higher Plants. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2019; 109:385-413. [PMID: 31637530 DOI: 10.1007/978-3-030-12858-6_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Since higher plants are unable to move in their environment, interesting and mysterious developmental events (allelopathy, phototropism, apical dominance, nyctinasty, flowering, senescence) are observed in their life cycle. Chemical compounds released from plant organs to the neighboring environment stimulate or suppress the development and/or growth of other plants; this chemical interaction is called "allelopathy." The bending of the organs of a plant toward the light is a well-known phenomenon called "phototropism." The growth of lateral buds of some plants is normally repressed by a strongly growing main shoot apex and is the so-called "apical dominance". Plants open their leaves during the day and close them at night as if sleeping is known as "nyctinasty." Herein, recent studies on isolation and structure elucidation of bioactive compounds involved in their life cycle and determination of the molecular mechanisms for these developmental events are described.
Collapse
|
227
|
Belhassine F, Martinez S, Bluy S, Fumey D, Kelner JJ, Costes E, Pallas B. Impact of Within-Tree Organ Distances on Floral Induction and Fruit Growth in Apple Tree: Implication of Carbohydrate and Gibberellin Organ Contents. FRONTIERS IN PLANT SCIENCE 2019; 10:1233. [PMID: 31695709 PMCID: PMC6816281 DOI: 10.3389/fpls.2019.01233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 09/05/2019] [Indexed: 06/10/2023]
Abstract
In plants, organs are inter-dependent for growth and development. Here, we aimed to investigate the distance at which interaction between organs operates and the relative contribution of within-tree variation in carbohydrate and hormonal contents on floral induction and fruit growth, in a fruit tree case study. Manipulations of leaf and fruit numbers were performed in two years on "Golden delicious" apple trees, at the shoot or branch scale or one side of Y-shape trees. For each treatment, floral induction proportion and mean fruit weight were recorded. Gibberellins content in shoot apical meristems, photosynthesis, and non-structural carbohydrate concentrations in organs were measured. Floral induction was promoted by leaf presence and fruit absence but was not associated with non-structural content in meristems. This suggests a combined action of promoting and inhibiting signals originating from leaves and fruit, and involving gibberellins. Nevertheless, these signals act at short distance only since leaf or fruit presence at long distances had no effect on floral induction. Conversely, fruit growth was affected by leaf presence even at long distances when sink demands were imbalanced within the tree, suggesting long distance transport of carbohydrates. We thus clarified the inter-dependence and distance effect among organs, therefore their degree of autonomy that appeared dependent on the process considered, floral induction or fruit growth.
Collapse
Affiliation(s)
- Fares Belhassine
- UMR AGAP, Univ. Montpellier, INRA, CIRAD, Montpellier SupAgro, Montpellier, France
- ITK, Montpellier, France
| | - Sébastien Martinez
- UMR AGAP, Univ. Montpellier, INRA, CIRAD, Montpellier SupAgro, Montpellier, France
| | - Sylvie Bluy
- UMR AGAP, Univ. Montpellier, INRA, CIRAD, Montpellier SupAgro, Montpellier, France
| | | | - Jean-Jacques Kelner
- UMR AGAP, Univ. Montpellier, INRA, CIRAD, Montpellier SupAgro, Montpellier, France
| | - Evelyne Costes
- UMR AGAP, Univ. Montpellier, INRA, CIRAD, Montpellier SupAgro, Montpellier, France
| | - Benoît Pallas
- UMR AGAP, Univ. Montpellier, INRA, CIRAD, Montpellier SupAgro, Montpellier, France
| |
Collapse
|
228
|
Yang Z, Chen L, Kohnen MV, Xiong B, Zhen X, Liao J, Oka Y, Zhu Q, Gu L, Lin C, Liu B. Identification and Characterization of the PEBP Family Genes in Moso Bamboo (Phyllostachys heterocycla). Sci Rep 2019; 9:14998. [PMID: 31628413 PMCID: PMC6802209 DOI: 10.1038/s41598-019-51278-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 09/27/2019] [Indexed: 11/09/2022] Open
Abstract
Moso bamboo is one of the economically most important plants in China. Moso bamboo is a monocarpic perennial that exhibits poor and slow germination. Thus, the flowering often causes destruction of moso bamboo forestry. However, how control of flowering and seed germination are regulated in moso bamboo is largely unclear. In this study, we identified 5 members (PhFT1-5) of the phosphatidyl ethanolamine-binding proteins (PEBP) family from moso bamboo genome that regulate flowering, flower architecture and germination, and characterized the function of these PEBP family genes further in Arabidopsis. Phylogenetic analysis revealed that 3 (PhFT1, PhFT2 and PhFT3), 1 (PhFT4) and 1 (PhFT5) members belong to the TFL1-like clade, FT-like clade, and MFT-like clade, respectively. These PEBP family genes possess all structure necessary for PEBP gene function. The ectopic overexpression of PhFT4 and PhFT5 promotes flowering time in Arabidopsis, and that of PhFT1, PhFT2 and PhFT3 suppresses it. In addition, the overexpression of PhFT5 promotes seed germination rate. Interestingly, the overexpression of PhFT1 suppressed seed germination rate in Arabidopsis. The expression of PhFT1 and PhFT5 is significantly higher in seed than in tissues including leaf and shoot apical meristem, implying their function in seed germination. Taken together, our results suggested that the PEBP family genes play important roles as regulators of flowering and seed germination in moso bamboo and thereby are necessary for the sustainability of moso bamboo forest.
Collapse
Affiliation(s)
- Zhaohe Yang
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Lei Chen
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Markus V Kohnen
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Bei Xiong
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Xi Zhen
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Jiakai Liao
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Yoshito Oka
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Qiang Zhu
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Lianfeng Gu
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Chentao Lin
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China.
- Department of Molecular, Cell & Developmental Biology, University of California, Los Angeles, CA, 90095, USA.
| | - Bobin Liu
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China.
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China.
| |
Collapse
|
229
|
Zhang S, Gottschalk C, van Nocker S. Genetic mechanisms in the repression of flowering by gibberellins in apple (Malus x domestica Borkh.). BMC Genomics 2019; 20:747. [PMID: 31619173 PMCID: PMC6796362 DOI: 10.1186/s12864-019-6090-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 09/09/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Gibberellins (GAs) can have profound effects on growth and development in higher plants. In contrast to their flowering-promotive role in many well-studied plants, GAs can repress flowering in woody perennial plants such as apple (Malus x domestica Borkh.). Although this effect of GA on flowering is intriguing and has commercial importance, the genetic mechanisms linking GA perception with flowering have not been well described. RESULTS Application of a mixture of bioactive GAs repressed flower formation without significant effect on node number or shoot elongation. Using Illumina-based transcriptional sequence data and a newly available, high-quality apple genome sequence, we generated transcript models for genes expressed in the shoot apex, and estimated their transcriptional response to GA. GA treatment resulted in downregulation of a diversity of genes participating in GA biosynthesis, and strong upregulation of the GA catabolic GA2 OXIDASE genes, consistent with GA feedback and feedforward regulation, respectively. We also observed strong downregulation of numerous genes encoding potential GA transporters and receptors. Additional GA-responsive genes included potential components of cytokinin (CK), abscisic acid (ABA), brassinosteroid, and auxin signaling pathways. Finally, we observed rapid and strong upregulation of both of two copies of a gene previously observed to inhibit flowering in apple, MdTFL1 (TERMINAL FLOWER 1). CONCLUSION The rapid and robust upregulation of genes associated with GA catabolism in response to exogenous GA, combined with the decreased expression of GA biosynthetic genes, highlights GA feedforward and feedback regulation in the apple shoot apex. The finding that genes with potential roles in GA metabolism, transport and signaling are responsive to GA suggests GA homeostasis may be mediated at multiple levels in these tissues. The observation that TFL1-like genes are induced quickly in response to GA suggests they may be directly targeted by GA-responsive transcription factors, and offers a potential explanation for the flowering-inhibitory effects of GA in apple. These results provide a context for investigating factors that may transduce the GA signal in apple, and contribute to a preliminary genetic framework for the repression of flowering by GAs in a woody perennial plant.
Collapse
Affiliation(s)
- Songwen Zhang
- Department of Horticulture and Graduate Program in Plant Breeding, Genetics, and Biotechnology, Michigan State University, 390 Plant and Soil Science Building, 1066 Bogue St., East Lansing, MI, 48824, USA
| | - Christopher Gottschalk
- Department of Horticulture and Graduate Program in Plant Breeding, Genetics, and Biotechnology, Michigan State University, 390 Plant and Soil Science Building, 1066 Bogue St., East Lansing, MI, 48824, USA
| | - Steve van Nocker
- Department of Horticulture and Graduate Program in Plant Breeding, Genetics, and Biotechnology, Michigan State University, 390 Plant and Soil Science Building, 1066 Bogue St., East Lansing, MI, 48824, USA.
| |
Collapse
|
230
|
Zheng T, Sun J, Zhou S, Chen S, Lu J, Cui S, Tian Y, Zhang H, Cai M, Zhu S, Wu M, Wang Y, Jiang L, Zhai H, Wang H, Wan J. Post-transcriptional regulation of Ghd7 protein stability by phytochrome and OsGI in photoperiodic control of flowering in rice. THE NEW PHYTOLOGIST 2019; 224:306-320. [PMID: 31225911 DOI: 10.1111/nph.16010] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Accepted: 06/10/2019] [Indexed: 06/09/2023]
Abstract
Rice (Oryza sativa) is a facultative short-day (SD) plant, flowering early under SD and late under long-day (LD) conditions. Ghd7 is a major regulator of flowering time in rice, which strongly delays flowering under LD. Induction of Ghd7 expression by phytochromes has been shown to contribute to photoperiodic regulation of flowering in rice. Here, we show that Ghd7 also is regulated by phytochromes at a post-transcriptional level. We found that constitutive expression of Ghd7 delays flowering in the wild-type (WT) background, but not in the se5 mutant background (deficient in functional phytochromes) under LD and that Ghd7 protein fails to accumulate in the se5 mutant. We also found that co-expressing OsGIGANTEA (OsGI) with Ghd7 causes reduced accumulation of Ghd7 protein and partially suppresses the delayed flowering phenotype in the WT background, suggesting that phytochromes and OsGI play antagonist roles in regulating Ghd7 protein stability and flowering time. We show that OsPHYA, OsPHYB and OsGI could directly interact with Ghd7. Interestingly, OsPHYA and OsPHYB could inhibit the interaction between OsGI and Ghd7, thus helping to stabilize Ghd7 protein. Our results revealed a new level of Ghd7 regulation by phytochromes and OsGI in photoperiodic control of flowering in rice.
Collapse
Affiliation(s)
- Tianhui Zheng
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Juan Sun
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shirong Zhou
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Saihua Chen
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jian Lu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Song Cui
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yunlu Tian
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Huan Zhang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Maohong Cai
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shanshan Zhu
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Mingming Wu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yihua Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ling Jiang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Huqu Zhai
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
| | - Haiyang Wang
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Jianmin Wan
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, China
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| |
Collapse
|
231
|
Nitrogen, phosphorus, and potassium fertilization affects the flowering time of rice (Oryza sativa L.). Glob Ecol Conserv 2019. [DOI: 10.1016/j.gecco.2019.e00753] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
|
232
|
Li S, Li Z, Zhang J, Wei D, Wang Z, Tang Q. Flowering signal integrator AGL24 interacts with K domain of AGL18 in Brassica juncea. Biochem Biophys Res Commun 2019; 518:148-153. [DOI: 10.1016/j.bbrc.2019.08.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 08/06/2019] [Indexed: 01/16/2023]
|
233
|
Cheng Y, Zhang N, Hussain S, Ahmed S, Yang W, Wang S. Integration of a FT expression cassette into CRISPR/Cas9 construct enables fast generation and easy identification of transgene-free mutants in Arabidopsis. PLoS One 2019; 14:e0218583. [PMID: 31545795 PMCID: PMC6756540 DOI: 10.1371/journal.pone.0218583] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 09/09/2019] [Indexed: 11/18/2022] Open
Abstract
The CRISPR/Cas9 genome editing technique has been widely used to generate transgene-free mutants in different plant species. Several different methods including fluorescence marker-assisted visual screen of transgene-free mutants and programmed self-elimination of CRISPR/Cas9 construct have been used to increase the efficiency of genome edited transgene-free mutant isolation, but the overall time length required to obtain transgene-free mutants has remained unchanged in these methods. We report here a method for fast generation and easy identification of transgene-free mutants in Arabidopsis. By generating and using a single FT expression cassette-containing CRISPR/Cas9 construct, we targeted two sites of the AITR1 gene. We obtained many early bolting plants in T1 generation, and found that about two thirds of these plants have detectable mutations. We then analyzed T2 generations of two representative lines of genome edited early bolting T1 plants, and identified plants without early bolting phenotype, i.e., transgene-free plants, for both lines. Further more, aitr1 homozygous mutants were successful obtained for both lines from these transgene-free plants. Taken together, these results suggest that the method described here enables fast generation, and at the mean time, easy identification of transgene-free mutants in plants.
Collapse
Affiliation(s)
- Yuxin Cheng
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, China
| | - Na Zhang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, China
| | - Saddam Hussain
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, China
| | - Sajjad Ahmed
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, China
| | - Wenting Yang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, China
| | - Shucai Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, China
- College of Life Science, Linyi University, Linyi, Shandong, China
| |
Collapse
|
234
|
Late flowering in F 1 hybrid rice brought about by the complementary effect of quantitative trait loci. Genetica 2019; 147:351-358. [PMID: 31432314 DOI: 10.1007/s10709-019-00075-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 08/14/2019] [Indexed: 10/26/2022]
Abstract
Late flowering sometimes occurs in F1 hybrids between rice varieties (Oryza sativa L.), although the parental varieties show similar days-to-flowering (DTF). The genetic architecture prompting the occurrence of such late flowering is poorly understood. To clarify the genetic architecture of late flowering in F1 hybrids from a cross between rice varieties, 'Koshihikari' and 'IR64', we performed quantitative trait locus (QTL) analysis using an F2 population (selfed progeny of an F1 plant), in which heterozygous genotypes should segregate in a certain proportion in a Mendelian manner. The QTL analysis detected three significant QTLs. At one QTL (putatively Heading date 1), the 'Koshihikari' allele increased DTF, and at the other two QTLs (putatively Heading date 6 and Oryza sativa Pseudo-Response Regulator 37/Heading date 2), the 'IR64' alleles increased DTF. All alleles at these three QTLs showed partial dominance. The combination of the QTLs explained 82.2% of the total phenotypic variance of DTF in the F2 population, with contribution from epistasis between QTLs. There was no difference between DTFs of F1 hybrids and heterozygous genotypes for the three QTLs. Our results demonstrated that the complementary effects accompanied by epistasis of at least three QTLs were responsible for late flowering in F1 hybrids.
Collapse
|
235
|
Takeshima R, Nan H, Harigai K, Dong L, Zhu J, Lu S, Xu M, Yamagishi N, Yoshikawa N, Liu B, Yamada T, Kong F, Abe J. Functional divergence between soybean FLOWERING LOCUS T orthologues FT2a and FT5a in post-flowering stem growth. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:3941-3953. [PMID: 31035293 PMCID: PMC6685666 DOI: 10.1093/jxb/erz199] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 04/17/2019] [Indexed: 05/19/2023]
Abstract
Genes in the FLOWERING LOCUS T (FT) family integrate external and internal signals to control various aspects of plant development. In soybean (Glycine max), FT2a and FT5a play a major role in floral induction, but their roles in post-flowering reproductive development remain undetermined. Ectopic overexpression analyses revealed that FT2a and FT5a similarly induced flowering, but FT5a was markedly more effective than FT2a for the post-flowering termination of stem growth. The down-regulation of Dt1, a soybean orthologue of Arabidopsis TERMINAL FLOWER1, in shoot apices in early growing stages of FT5a-overexpressing plants was concomitant with highly up-regulated expression of APETALA1 orthologues. The Dt2 gene, a repressor of Dt1, was up-regulated similarly by the overexpression of FT2a and FT5a, suggesting that it was not involved in the control of stem termination by FT5a. In addition to the previously reported interaction with FDL19, a homologue of the Arabidopsis bZIP protein FD, both FT2a and FT5a interacted with FDL12, but only FT5a interacted with FDL06. Our results suggest that FT2a and FT5a have different functions in the control of post-flowering stem growth. A specific interaction of FT5a with FDL06 may play a key role in determining post-flowering stem growth in soybean.
Collapse
Affiliation(s)
- Ryoma Takeshima
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan
- Institute of Crop Science, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan
| | - Haiyang Nan
- School of Life Science, Guangzhou University, Guangzhou, China
| | - Kohei Harigai
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Lidong Dong
- School of Life Science, Guangzhou University, Guangzhou, China
| | - Jianghui Zhu
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Sijia Lu
- School of Life Science, Guangzhou University, Guangzhou, China
| | - Meilan Xu
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, China
| | | | | | - Baohui Liu
- School of Life Science, Guangzhou University, Guangzhou, China
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, China
| | - Tetsuya Yamada
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Fanjiang Kong
- School of Life Science, Guangzhou University, Guangzhou, China
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, China
| | - Jun Abe
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan
| |
Collapse
|
236
|
Zhao J, Gao P, Li C, Lin X, Guo X, Liu S. PhePEBP family genes regulated by plant hormones and drought are associated with the activation of lateral buds and seedling growth in Phyllostachys edulis. TREE PHYSIOLOGY 2019; 39:1387-1404. [PMID: 31115464 DOI: 10.1093/treephys/tpz056] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 04/08/2019] [Accepted: 05/10/2019] [Indexed: 06/09/2023]
Abstract
Development of lateral buds on the underground rhizome in moso bamboo is essentially the early stage of the development of aboveground branching, which is regulated by Phosphatidyl-Ethanolamine Binding Protein (PEBP) family genes, but it is unknown whether the PEBP family genes are involved in the activation and development of lateral buds underground. By scanning the whole-genome sequence of moso bamboo, we identified 25 PhePEBP family genes and amplified their full-length open reading frames (ORFs). A sequence analysis revealed that they are composed of four exons and three introns, except for PheFT10, which contains six exons and five introns. PheFT10 underwent alternative splicing, resulting in at least four transcripts (PheFT10α, PheFT10β, PheFT10γ and PheFT10δ). Although PhePEBP genes are generally expressed at low levels and show dramatically organ-specific expressions, the transcription levels of most PhePEBP genes, including the transcripts of PheFT10, change with plant age. Together with the observation that the expression of PhePEBP family genes can be regulated by plant hormones and drought, our data suggest that PhePEBP family genes might be involved in the activation of lateral buds and seedling growth. Particularly, PheFT9, PheTFL2 and PheTFL8 may play vital roles during the activation of dormant buds based on the analysis of amino acid substitution and expression profile. These findings provide insights for in-depth exploration of the biological functions of the PhePEBP family genes in regulating the activation of dormant bud and the development of seedling in moso bamboo.
Collapse
Affiliation(s)
- Jianwen Zhao
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
| | - Peijun Gao
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
| | - Chunlong Li
- Section of Horticulture, School of Integrative Plant Science, Cornell University, Ithaca, NY, USA
| | - Xinchun Lin
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
| | - Xiaoqin Guo
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
- Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, Zhejiang A&F University, Lin'An, Zhejiang, China
| | - Shenkui Liu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
| |
Collapse
|
237
|
Ortega R, Hecht VFG, Freeman JS, Rubio J, Carrasquilla-Garcia N, Mir RR, Penmetsa RV, Cook DR, Millan T, Weller JL. Altered Expression of an FT Cluster Underlies a Major Locus Controlling Domestication-Related Changes to Chickpea Phenology and Growth Habit. FRONTIERS IN PLANT SCIENCE 2019; 10:824. [PMID: 31333691 PMCID: PMC6616154 DOI: 10.3389/fpls.2019.00824] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 06/07/2019] [Indexed: 05/20/2023]
Abstract
Flowering time is a key trait in breeding and crop evolution, due to its importance for adaptation to different environments and for yield. In the particular case of chickpea, selection for early phenology was essential for the successful transition of this species from a winter to a summer crop. Here, we used genetic and expression analyses in two different inbred populations to examine the genetic control of domestication-related differences in flowering time and growth habit between domesticated chickpea and its wild progenitor Cicer reticulatum. A single major quantitative trait locus for flowering time under short-day conditions [Days To Flower (DTF)3A] was mapped to a 59-gene interval on chromosome three containing a cluster of three FT genes, which collectively showed upregulated expression in domesticated relative to wild parent lines. An equally strong association with growth habit suggests a pleiotropic effect of the region on both traits. These results indicate the likely molecular explanation for the characteristic early flowering of domesticated chickpea, and the previously described growth habit locus Hg. More generally, they point to de-repression of this specific gene cluster as a conserved mechanism for achieving adaptive early phenology in temperate legumes.
Collapse
Affiliation(s)
- Raul Ortega
- School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia
| | | | - Jules S. Freeman
- School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia
- Scion, Rotorua, New Zealand
| | - Josefa Rubio
- E. Genomica y Biotecnologia, Instituto Andaluz de Investigación y Formación Agraria y Pesquera (IFAPA), Córdoba, Spain
| | | | - Reyazul Rouf Mir
- Department of Plant Pathology, University of California, Davis, Davis, CA, United States
- Division of Genetics and Plant Breeding, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - R. Varma Penmetsa
- Department of Plant Pathology, University of California, Davis, Davis, CA, United States
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
| | - Douglas R. Cook
- Department of Plant Pathology, University of California, Davis, Davis, CA, United States
| | - Teresa Millan
- Department of Genetics ETSIAM, University of Córdoba, Córdoba, Spain
| | - James L. Weller
- School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia
| |
Collapse
|
238
|
Natarajan B, Kondhare KR, Hannapel DJ, Banerjee AK. Mobile RNAs and proteins: Prospects in storage organ development of tuber and root crops. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 284:73-81. [PMID: 31084881 DOI: 10.1016/j.plantsci.2019.03.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 03/21/2019] [Accepted: 03/25/2019] [Indexed: 05/04/2023]
Abstract
Storage tuber and root crops make up a significant portion of the world's subsistence food supply. Because of their importance in food security, yield enhancement has become a priority. A major focus has been to understand the biology of belowground storage organ development. Considerable insights have been gained studying tuber development in potato. We now know that two mobile signals, a full-length mRNA, StBEL5, and a protein, StSP6A, play pivotal roles in regulating tuber development. Under favorable conditions, these signals move from leaves to a belowground modified stem (stolon) and regulate genes that activate tuberization. Overexpression of StBEL5 or StSP6A increases tuber yield even under non-inductive conditions. The mRNAs of two close homologs of StBEL5, StBEL11 and StBEL29, are also known to be mobile but act as repressors of tuberization. Polypyrimidine tract-binding proteins (PTBs) are RNA-binding proteins that facilitate the movement of these mRNAs. Considering their role in tuberization, it is possible that these mobile signals play a major role in storage root development as well. In this review, we explore the presence of these signals and their relevance in the development and yield potential of several important storage root crops.
Collapse
Affiliation(s)
- Bhavani Natarajan
- Indian Institute of Science Education and Research (IISER), Biology Division, Pune, 411008, India
| | - Kirtikumar R Kondhare
- Indian Institute of Science Education and Research (IISER), Biology Division, Pune, 411008, India
| | - David J Hannapel
- Plant Biology Major, 253 Horticulture Hall, Iowa State University (ISU), Ames, IA, United States
| | - Anjan K Banerjee
- Indian Institute of Science Education and Research (IISER), Biology Division, Pune, 411008, India.
| |
Collapse
|
239
|
Kang YJ, Lee BM, Nam M, Oh KW, Lee MH, Kim TH, Jo SH, Lee JH. Identification of quantitative trait loci associated with flowering time in perilla using genotyping-by-sequencing. Mol Biol Rep 2019; 46:4397-4407. [PMID: 31152338 DOI: 10.1007/s11033-019-04894-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 05/22/2019] [Indexed: 12/11/2022]
Abstract
Understanding the transition to the reproductive period is important for crop breeding. This information can facilitate the production of novel varieties that are better adapted to local environments or changing climatic conditions. Here, we report the development of a high-density linkage map based on genotyping-by-sequencing (GBS) for the genus perilla. Through GBS library construction and Illumina sequencing of an F2 population, a total of 9607 single-nucleotide polymorphism (SNP) markers were developed. The ten-group linkage map of 1309.39 cM contained 2518 markers, with an average marker density of 0.56 cM per linkage group (LG). Using this map, a total of six QTLs were identified. These quantitative trait loci (QTLs) are associated with three traits related to flowering time: days to visible flower bud, days to flowering, and days to maturity. Ortholog analysis conducted with known genes involved in the regulation of flowering time among different crop species identified GI, CO and ELF4 as putative perilla orthologs that are closely linked to the QTL regions associated with flowering time. These results provide a foundation that will be useful for future studies of flowering time in perilla using fine mapping, and marker-assisted selection for the development of new varieties of perilla.
Collapse
Affiliation(s)
| | - Bo-Mi Lee
- SEEDERS Inc., Daejeon, 34912, Republic of Korea
| | - Moon Nam
- SEEDERS Inc., Daejeon, 34912, Republic of Korea
| | - Ki-Won Oh
- National Institute of Crop Science, RDA, Miryang, 50424, Republic of Korea
| | - Myoung-Hee Lee
- National Institute of Crop Science, RDA, Miryang, 50424, Republic of Korea
| | - Tae-Ho Kim
- National Academy of Agricultural Science, RDA, Wanju, 55365, Republic of Korea
| | - Sung-Hwan Jo
- SEEDERS Inc., Daejeon, 34912, Republic of Korea.
| | | |
Collapse
|
240
|
Zheng J, Ma Y, Zhang M, Lyu M, Yuan Y, Wu B. Expression Pattern of FT/TFL1 and miR156-Targeted SPL Genes Associated with Developmental Stages in Dendrobium catenatum. Int J Mol Sci 2019; 20:ijms20112725. [PMID: 31163611 PMCID: PMC6600168 DOI: 10.3390/ijms20112725] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 05/28/2019] [Accepted: 05/29/2019] [Indexed: 01/03/2023] Open
Abstract
Time to flower, a process either referring to juvenile-adult phase change or vegetative-reproductive transition, is strictly controlled by an intricate regulatory network involving at least both FT/TFL1 and the micro RNA (miR)156-regulated SPL family members. Despite substantial progresses recently achieved in Arabidopsis and other plant species, information regarding the involvement of these genes during orchid development and flowering competence is still limited. Dendrobium catenatum, a popular orchid species, exhibits a juvenile phase of at least three years. Here, through whole-genome mining and whole-family expression profiling, we analyzed the homologous genes of FT/TFL1, miR156, and SPL with special reference to the developmental stages. The FT/TFL1 family contains nine members; among them, DcHd3b transcribes abundantly in young and juvenile tissues but not in adult, contrasting with the low levels of others. We also found that mature miR156, encoded by a single locus, accumulated in large quantity in protocorms and declined by seedling development, coincident with an increase in transcripts of three of its targeted SPL members, namely DcSPL14, DcSPL7, and DcSPL18. Moreover, among the seven predicted miR156-targeted SPLs, only DcSPL3 was significantly expressed in adult plants and was associated with plant maturation. Our results might suggest that the juvenile phase change or maturation in this orchid plant likely involves both the repressive action of a TFL1-like pathway and the promotive effect from an SPL3-mediated mechanism.
Collapse
Affiliation(s)
- Jie Zheng
- Fujian Provincial Key Laboratory of Plant Functional Biology, College of Horticulture, Fujian A & University, Fuzhou 350002, China.
| | - Yuru Ma
- Fujian Provincial Key Laboratory of Plant Functional Biology, College of Horticulture, Fujian A & University, Fuzhou 350002, China.
| | - Mengyao Zhang
- Fujian Provincial Key Laboratory of Plant Functional Biology, College of Horticulture, Fujian A & University, Fuzhou 350002, China.
| | - Meiling Lyu
- Fujian Provincial Key Laboratory of Plant Functional Biology, College of Horticulture, Fujian A & University, Fuzhou 350002, China.
| | - Yuan Yuan
- Fujian Provincial Key Laboratory of Plant Functional Biology, College of Horticulture, Fujian A & University, Fuzhou 350002, China.
| | - Binghua Wu
- Fujian Provincial Key Laboratory of Plant Functional Biology, College of Horticulture, Fujian A & University, Fuzhou 350002, China.
| |
Collapse
|
241
|
Bi Z, Tahir AT, Huang H, Hua Y. Cloning and functional analysis of five TERMINAL FLOWER 1/CENTRORADIALIS-like genes from Hevea brasiliensis. PHYSIOLOGIA PLANTARUM 2019; 166:612-627. [PMID: 30069883 DOI: 10.1111/ppl.12808] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 07/12/2018] [Accepted: 07/17/2018] [Indexed: 05/14/2023]
Abstract
Five TERMINAL FLOWER 1 (TFL1)/CENTRORADIALIS (CEN)-like genes were isolated and characterized from rubber tree (Hevea brasiliensis). All genes, except HbCEN1, were found to have conserved genomic organization, characteristic of the phosphatidyl ethanolamine-binding protein (PEBP) family. Overexpression of all of them delayed flowering and altered flower architecture compared with the wild-type (wt) counterpart. In addition, as premature-flowering of the terminal bud was successfully overcome in the tfl1-1 mutant of Arabidopsis, all these genes have a potential function similar to TFL1. Quantitative reverse transcriptase-polymerase chain reaction analysis showed higher expressions of HbCEN1 and HbCEN2 in the shoot apices and stems of both immature and mature rubber trees than in reproductive organs. HbTFL1-1 and HbTFL1-2 expression was confined to roots of 3-month-old seedlings and HbTFL1-3 was significantly higher in the shoot apices of these seedlings. These results suggested that HbCEN1 and HbCEN2 could be associated with the development of vegetative growth, whereas HbTFL1-1, HbTFL1-2 and HbTFL1-3 seem to be mainly related with maintenance of juvenility. In addition, four of the five genes displayed variable diurnal expression, HbTFL1-1 and HbTFL1-3 being mainly expressed during the night whereas HbCEN1 and HbCEN2 showed irregular diurnal rhythms.
Collapse
Affiliation(s)
- Zhenghong Bi
- Key Laboratory of Rubber Biology of the Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, 571737, China
| | - Ayesha T Tahir
- Department of Biosciences, COMSATS University, Islamabad, Pakistan
| | - Huasun Huang
- Key Laboratory of Rubber Biology of the Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, 571737, China
| | - Yuwei Hua
- Key Laboratory of Rubber Biology of the Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, 571737, China
| |
Collapse
|
242
|
Nakano Y, Takase T, Takahashi S, Sumitomo K, Higuchi Y, Hisamatsu T. Chrysanthemum requires short-day repeats for anthesis: Gradual CsFTL3 induction through a feedback loop under short-day conditions. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 283:247-255. [PMID: 31128695 DOI: 10.1016/j.plantsci.2019.01.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 01/24/2019] [Accepted: 01/25/2019] [Indexed: 05/24/2023]
Abstract
Chrysanthemums require continuous short-days (SD) for anthesis. FTL3 (FLOWERING LOCUS T-like 3), a floral promoter expressed in chrysanthemum leaf, forms a complex with its interacting partner FDL1 to induce floral meristem identity gene AFL1. We explored the FTL3 induction mechanism during SD repeats in Chrysanthemum seticuspe. CsFTL3 expression was not immediately induced by a shift from long-day (LD) to SD, but gradually increased until the capitulum development stage under repeated SDs. Overexpression of CsFTL3 transgene increased endogenous leaf CsFTL3 induction under SD but not LD. Overexpression of CsFDL1 promoted anthesis and increased CsAFL1 and CsFTL3 expression under SD. Loss-of-function of CsFDL1 by RNAi resulted in delayed anthesis and downregulation of leaf CsAFL1 and CsFTL3, indicating the necessity of CsFDL1 for CsFTL3 induction. Overexpression of an antagonistic protein of CsFTL3 or CsFDL1 inhibited leaf CsFTL3 induction. CsFTL3 expression was positively regulated during SDs by a feedback mechanism involving the CsFTL3-CsFDL1 complex. Furthermore, flowering was accomplished by feedback with high levels of CsFTL3 induction under repeated SDs.
Collapse
Affiliation(s)
- Yoshihiro Nakano
- Institute of Vegetable and Floriculture Science, National Agriculture and Food Research Organization (NARO), 2-1 Fujimoto, Tsukuba, Ibaraki, 305-0852, Japan
| | - Tomoyuki Takase
- Institute of Vegetable and Floriculture Science, National Agriculture and Food Research Organization (NARO), 2-1 Fujimoto, Tsukuba, Ibaraki, 305-0852, Japan
| | - Shigekazu Takahashi
- Institute of Vegetable and Floriculture Science, National Agriculture and Food Research Organization (NARO), 2-1 Fujimoto, Tsukuba, Ibaraki, 305-0852, Japan
| | - Katsuhiko Sumitomo
- Institute of Vegetable and Floriculture Science, National Agriculture and Food Research Organization (NARO), 2-1 Fujimoto, Tsukuba, Ibaraki, 305-0852, Japan
| | - Yohei Higuchi
- Institute of Vegetable and Floriculture Science, National Agriculture and Food Research Organization (NARO), 2-1 Fujimoto, Tsukuba, Ibaraki, 305-0852, Japan
| | - Tamotsu Hisamatsu
- Institute of Vegetable and Floriculture Science, National Agriculture and Food Research Organization (NARO), 2-1 Fujimoto, Tsukuba, Ibaraki, 305-0852, Japan.
| |
Collapse
|
243
|
Cui Y, Zhu M, Xu Z, Xu Q. Assessment of the effect of ten heading time genes on reproductive transition and yield components in rice using a CRISPR/Cas9 system. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2019; 132:1887-1896. [PMID: 30887096 DOI: 10.1007/s00122-019-03324-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 03/11/2019] [Indexed: 05/22/2023]
Abstract
We demonstrated the effect of heading time genes on reproductive transition and yield components under an identical genetic background using CRISPR/Cas9 gene-editing technology, and we propose that the elite allele will provide a new breeding strategy for rice breeding in high-latitude regions. Heading date is a factor closely associated with grain yield in rice (Oryza sativa L). In recent decades, a number of genes responsible for heading time have been identified, the variation of which contributes to the expansion of the rice cultivation area. However, it is difficult to compare the phenotypic effects of these genes due to the different genetic backgrounds. In this study, we generated 14 heading time mutants using CRISPR/Cas9 gene-editing technology and marker-assisted selection with a japonica Sasanishiki wild-type (WT) genetic background. Photoperiod sensitivity, the relationship between days to heading (DTH), and yield components of mutants were investigated. We found that the yield increases with increases in DTH, but eventually plateaus at maximum and then began to decrease, whereas the biomass continued to increase. The mutants exerted distinctly different effects on DTH and yield components. The convergent double mutants had severe yield reduction compared with single mutants, even with a DTH that was similar to that of single mutants. We also found that an elite mutant of se14 achieved a yield equal to that of the WT, but with heading occurring 10 days earlier. A sequence analysis of 72 cultivars collected from the japonica cultivated zone shows that elite se14 mutants have not been applied to rice breeding. Our study demonstrates the effect of heading time genes on reproductive transition and yield components under an identical genetic background. These results may provide new insights into rice breeding using heading time mutants.
Collapse
Affiliation(s)
- Yue Cui
- Rice Research Institute of Shenyang Agricultural University, Shenyang, 110866, China
| | - Mengmeng Zhu
- Rice Research Institute of Shenyang Agricultural University, Shenyang, 110866, China
| | - Zhengjin Xu
- Rice Research Institute of Shenyang Agricultural University, Shenyang, 110866, China
| | - Quan Xu
- Rice Research Institute of Shenyang Agricultural University, Shenyang, 110866, China.
| |
Collapse
|
244
|
Pasriga R, Yoon J, Cho LH, An G. Overexpression of RICE FLOWERING LOCUS T 1 ( RFT1) Induces Extremely Early Flowering in Rice. Mol Cells 2019; 42:406-417. [PMID: 31085810 PMCID: PMC6537653 DOI: 10.14348/molcells.2019.0009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/24/2019] [Accepted: 03/05/2019] [Indexed: 11/27/2022] Open
Abstract
RICE FLOWERING LOCUS T 1 (RFT1) is a major florigen that functions to induce reproductive development in the shoot apical meristem (SAM). To further our study of RFT1, we overexpressed the gene and examined the expression patterns of major regulatory genes during floral transition and inflorescence development. Overexpression induced extremely early flowering in the transgenics, and a majority of those calli directly formed spikelets with a few spikelets, thus bypassing normal vegetative development. FRUITFULL (FUL)-clade genes OsMADS14, OsMADS15, and OsMADS18 were highly induced in the RFT1-expressing meristems. Os-MADS34 was also induced in the meristems. This indicated that RFT1 promotes the expression of major regulatory genes that are important for inflorescence development. RFT1 overexpression also induced SEPALLATA (SEP)-clade genes OsMADS1, OsMADS5, and OsMADS7 in the greening calli before floral transition occurred. This suggested their possible roles at the early reproductive stages. We found it interesting that expression of OsFD1 as well as OsFD2 and OsFD3 was strongly increased in the RFT1-expressing calli and spikelets. At a low frequency, those calli produced plants with a few leaves that generated a panicle with a small number of spikelets. In the transgenic leaves, the FULclade genes and OsMADS34 were induced, but SEP-clade gene expression was not increased. This indicated that OsMADS14, OsMADS15, OsMADS18, and OsMADS34 act immediately downstream of RFT1.
Collapse
Affiliation(s)
- Richa Pasriga
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin 17104,
Korea
| | - Jinmi Yoon
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin 17104,
Korea
| | - Lae-Hyeon Cho
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin 17104,
Korea
| | - Gynheung An
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin 17104,
Korea
| |
Collapse
|
245
|
Liu X, Liu Z, Hao Z, Chen G, Qi K, Zhang H, Jiao H, Wu X, Zhang S, Wu J, Wang P. Characterization of Dof family in Pyrus bretschneideri and role of PbDof9.2 in flowering time regulation. Genomics 2019; 112:712-720. [PMID: 31078718 DOI: 10.1016/j.ygeno.2019.05.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 05/04/2019] [Accepted: 05/08/2019] [Indexed: 12/26/2022]
Abstract
DNA binding with One Finger (Dof) proteins are plant-specific transcription factors with highly conserved Dof domain, including C2-C2 type zinc finger motifs. In this study, we identified 45 PbDofs in pear (Pyrusbretschneideri). PbDofs were classified into eight subfamilies by phylogenetic analysis. Conserved motifs of PbDof proteins were analyzed by MEME. PbDofs in subfamily D1 werehomologous to CDFs in Arabidopsis. In this study, we showed that PbDof9.2 was regulated by both the circadian clock and photoperiod. PbDof9.2-GFP proteinwas localized in the nucleus. Overexpression of PbDof9.2 in Arabidopsis caused delayed flowering time. PbDof9.2 suppressed the flowering time regulator FT and could repress flowering time by promoting activity of PbTFL1a and PbTFL1b promoter. These results suggest that Doftranscription factors have conserved functions in plant development.
Collapse
Affiliation(s)
- Xueying Liu
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhe Liu
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
| | - Ziwei Hao
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
| | - Guodong Chen
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
| | - Kaijie Qi
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
| | - Hao Zhang
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
| | - Huijun Jiao
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiao Wu
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
| | - Shaoling Zhang
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
| | - Juyou Wu
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China.
| | - Peng Wang
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China.
| |
Collapse
|
246
|
Kang J, Zhang T, Guo T, Ding W, Long R, Yang Q, Wang Z. Isolation and Functional Characterization of MsFTa, a FLOWERING LOCUS T Homolog from Alfalfa ( Medicago sativa). Int J Mol Sci 2019; 20:ijms20081968. [PMID: 31013631 PMCID: PMC6514984 DOI: 10.3390/ijms20081968] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 03/18/2019] [Accepted: 04/15/2019] [Indexed: 01/16/2023] Open
Abstract
The production of hay and seeds of alfalfa, an important legume forage for the diary industry worldwide, is highly related to flowering time, which has been widely reported to be integrated by FLOWERING LOCUS T (FT). However, the function of FT(s) in alfalfa is largely unknown. Here, we identified MsFTa, an FT ortholog in alfalfa, and characterized its role in flowering regulation. MsFTa shares the conserved exon/intron structure of FTs, and the deduced MsFTa is 98% identical to MtFTa1 in Medicago trucatula. MsFTa was diurnally regulated with a peak before the dark period, and was preferentially expressed in leaves and floral buds. Transient expression of MsFTa-GFP fusion protein demonstrated its localization in the nucleus and cytoplasm. When ectopically expressed, MsFTa rescued the late-flowering phenotype of ft mutants from Arabidopsis and M. trucatula. MsFTa over-expression plants of both Arabidopsis and M. truncatula flowered significantly earlier than the non-transgenic controls under long day conditions, indicating that exogenous MsFTa strongly accelerated flowering. Hence, MsFTa functions positively in flowering promotion, suggesting that MsFTa may encode a florigen that acts as a key regulator in the flowering pathway. This study provides an effective candidate gene for optimizing alfalfa flowering time by genetically manipulating the expression of MsFTa.
Collapse
Affiliation(s)
- Junmei Kang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Tiejun Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Tao Guo
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Wang Ding
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Ruicai Long
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Qingchuan Yang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Zhen Wang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| |
Collapse
|
247
|
Ke Y, Wu M, Zhang Q, Li X, Xiao J, Wang S. Hd3a and OsFD1 negatively regulate rice resistance to Xanthomonas oryzae pv. oryzae and Xanthomonas oryzae pv. oryzicola. Biochem Biophys Res Commun 2019; 513:775-780. [PMID: 30992130 DOI: 10.1016/j.bbrc.2019.03.169] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 03/26/2019] [Indexed: 11/28/2022]
Abstract
In rice, Hd3a, GF14 and OsFD1 proteins, forming florigen activation complex, are key components in flowering time regulation. GF14 genes in rice response to biotic and abiotic stress has also been well addressed. The role of GF14e in rice defense has been well studied. However, whether Hd3a and OsFD1 play roles in defense is unclear. In present study, we identified that Hd3a and OsFD1 expression is repressed by Xoo and JA, and validated that Hd3a and OsFD1 negatively regulate resistance to Xanthomonas oryzae pv. oryzae (Xoo) and Xanthomonas oryzae pv. oryzicola (Xoc). hd3a and osfd1 mutants increase resistance to Xoo and Xoc, and activate JA responsive genes expression. Our data also demonstrate that OsFD1 binds to the promoters of and activates the expression of JAZ genes; Hd3a, cooperating with GF14e, promotes OsFD1 action on JAZ gene expression. The functional confirmation of Hd3a and OsFD1 in rice defense makes them to be promising targets in molecular rice breeding.
Collapse
Affiliation(s)
- Yinggen Ke
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan, 430070, China
| | - Mengxiao Wu
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan, 430070, China
| | - Qinglu Zhang
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan, 430070, China
| | - Xianghua Li
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan, 430070, China
| | - Jinghua Xiao
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan, 430070, China
| | - Shiping Wang
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan, 430070, China.
| |
Collapse
|
248
|
Casto AL, Mattison AJ, Olson SN, Thakran M, Rooney WL, Mullet JE. Maturity2, a novel regulator of flowering time in Sorghum bicolor, increases expression of SbPRR37 and SbCO in long days delaying flowering. PLoS One 2019; 14:e0212154. [PMID: 30969968 PMCID: PMC6457528 DOI: 10.1371/journal.pone.0212154] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 03/22/2019] [Indexed: 11/19/2022] Open
Abstract
Sorghum bicolor is a drought-resilient facultative short-day C4 grass that is grown for grain, forage, and biomass. Adaptation of sorghum for grain production in temperate regions resulted in the selection of mutations in Maturity loci (Ma1 -Ma6) that reduced photoperiod sensitivity and resulted in earlier flowering in long days. Prior studies identified the genes associated with Ma1 (PRR37), Ma3 (PHYB), Ma5 (PHYC) and Ma6 (GHD7) and characterized their role in the flowering time regulatory pathway. The current study focused on understanding the function and identity of Ma2. Ma2 delayed flowering in long days by selectively enhancing the expression of SbPRR37 (Ma1) and SbCO, genes that co-repress the expression of SbCN12, a source of florigen. Genetic analysis identified epistatic interactions between Ma2 and Ma4 and located QTL corresponding to Ma2 on SBI02 and Ma4 on SBI10. Positional cloning and whole genome sequencing identified a candidate gene for Ma2, Sobic.002G302700, which encodes a SET and MYND (SYMD) domain lysine methyltransferase. Eight sorghum genotypes previously identified as recessive for Ma2 contained the mutated version of Sobic.002G302700 present in 80M (ma2) and one additional putative recessive ma2 allele was identified in diverse sorghum accessions.
Collapse
Affiliation(s)
- Anna L. Casto
- Biochemistry and Biophysics Department, Texas A&M University, College Station, TX, United States of America
| | - Ashley J. Mattison
- Biochemistry and Biophysics Department, Texas A&M University, College Station, TX, United States of America
| | - Sara N. Olson
- Biochemistry and Biophysics Department, Texas A&M University, College Station, TX, United States of America
| | - Manish Thakran
- Biochemistry and Biophysics Department, Texas A&M University, College Station, TX, United States of America
| | - William L. Rooney
- Soil and Crop Science Department, Texas A&M University, College Station, TX, United States of America
| | - John E. Mullet
- Biochemistry and Biophysics Department, Texas A&M University, College Station, TX, United States of America
| |
Collapse
|
249
|
Abe M, Kosaka S, Shibuta M, Nagata K, Uemura T, Nakano A, Kaya H. Transient activity of the florigen complex during the floral transition in Arabidopsis thaliana. Development 2019; 146:146/7/dev171504. [PMID: 30940631 DOI: 10.1242/dev.171504] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 02/25/2019] [Indexed: 12/14/2022]
Abstract
FLOWERING LOCUS T (FT) is an essential component of florigen in Arabidopsis thaliana Transcription of FT is induced in leaves, and the resulting FT protein is transported to the shoot apex, in which it initiates floral development. Previous analyses suggest that, together with the b-ZIP transcription factor FD, FT regulates the transcription of downstream targets such as APETALA1 (AP1) in floral anlagen. However, conclusive in vivo evidence that FT is transported to the shoot apex to form an FT-FD complex is lacking. Here, using an innovative in vivo imaging technique, we show that the FT-FD complex and AP1 colocalise in floral anlagen. In addition, the FT-FD complex disappears soon after the floral transition owing to a reduction in FD transcripts in the shoot apex. We further show that misinduction of FD activity after the transition leads to defective reproductive development. Taken together, our results indicate that the FT-FD complex functions as a transient stimulus and imply that a regulatory mechanism exists during the floral transition that reduces FT-FD complex levels via modulation of FD expression.
Collapse
Affiliation(s)
- Mitsutomo Abe
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shingo Kosaka
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Mio Shibuta
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kenji Nagata
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tomohiro Uemura
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
| | - Akihiko Nakano
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Hidetaka Kaya
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Department of Food Production Science, Graduate School of Agriculture, Ehime University, Tarumi, Matsuyama, Ehime 790-8566, Japan
| |
Collapse
|
250
|
Fujino K, Yamanouchi U, Nonoue Y, Obara M, Yano M. Switching genetic effects of the flowering time gene Hd1 in LD conditions by Ghd7 and OsPRR37 in rice. BREEDING SCIENCE 2019; 69:127-132. [PMID: 31086490 PMCID: PMC6507719 DOI: 10.1270/jsbbs.18060] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 11/01/2018] [Indexed: 05/20/2023]
Abstract
Flowering time control in plants is a major limiting factor on the range of species. Day length, perceived via the photoperiodic pathway, is a critical factor for the induction of flowering. The module of GIGANTEA (GI)-CONSTANS (CO)-FLOWERING LOCUS T in the long day (LD) plant Arabidopsis is conserved in diverse plant species including the short day (SD) plant rice, where this module comprises OsGI-Heading date 1 (Hd1)-Heading date 3a. Hd1, the rice ortholog of Arabidopsis CO, has dual functions in the regulation of flowering time, promoting flowering in SD conditions and delaying it in LD conditions. We herein show genetic interactions among three LD repressor genes: Hd1, Grain number, plant height and heading date 7 (Ghd7), and Oryza sativa Pseudo-Response Regulator37 (OsPRR37). Genetic analyses, including segregation analyses, evaluations of near isogenic lines, and transformation for flowering time demonstrated that Hd1 promoted flowering time in inductive SD and non-inductive LD conditions in genetic condition of loss-of-function Ghd7 and OsPRR37 (ghd7osprr37) in rice. Functional Ghd7 or OsPRR37 may switch the genetic effects of Hd1 from the promotion to the delay of flowering times in LD conditions.
Collapse
Affiliation(s)
- Kenji Fujino
- Hokkaido Agricultural Research Center, National Agricultural Research Organization,
Sapporo, Hokkaido 062-8555,
Japan
- Corresponding author (e-mail: )
| | - Utako Yamanouchi
- Institute of Crop Science, National Agricultural Research Organization,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
| | - Yasunori Nonoue
- Institute of Crop Science, National Agricultural Research Organization,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
| | - Mari Obara
- Hokkaido Agricultural Research Center, National Agricultural Research Organization,
Sapporo, Hokkaido 062-8555,
Japan
| | - Masahiro Yano
- Institute of Crop Science, National Agricultural Research Organization,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
| |
Collapse
|