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Huang P, Yang J, Ke J, Cai L, Hu Y, Ni J, Li C, Xu ZF, Tang M. Inhibition of flowering by gibberellins in the woody plant Jatropha curcas is restored by overexpression of JcFT. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 344:112100. [PMID: 38679393 DOI: 10.1016/j.plantsci.2024.112100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 04/06/2024] [Accepted: 04/16/2024] [Indexed: 05/01/2024]
Abstract
Jatropha curcas (J. curcas) is a perennial oil-seed plant with vigorous vegetative growth but relatively poor reproductive growth and low seed yield. Gibberellins (GAs) promotes flowering in most annual plants but inhibits flowering in many woody plants, including J. curcas. However, the underlying mechanisms of GA inhibits flowering in perennial woody plants remain unclear. Here, we found that overexpression of the GA biosynthesis gene JcGA20ox1 inhibits flowering in J. curcas and in J. curcas × J. integerrima hybrids. Consistent with this finding, overexpression of the GA catabolic gene JcGA2ox6 promotes flowering in J. curcas. qRTPCR revealed that inhibits floral transition by overexpressing JcGA20ox1 resulted from a decrease in the expression of JcFT and other flowering-related genes, which was restored by overexpressing JcFT in J. curcas. Overexpression of JcGA20ox1 or JcGA2ox6 reduced seed yield, but overexpression of JcFT significantly increased seed yield. Furthermore, hybridization experiments showed that the reduction in seed yield caused by overexpression of JcGA20ox1 or JcGA2ox6 was partially restored by the overexpression of JcFT. In addition, JcGA20ox1, JcGA2ox6 and JcFT were also found to be involved in the regulation of seed oil content and endosperm development. In conclusion, our study revealed that the inhibitory effect of GA on flowering is mediated through JcFT and demonstrated the effects of JcGA20ox1, JcGA2ox6 and JcFT on agronomic traits in J. curcas. This study also indicates the potential value of GA metabolism genes and JcFT in the breeding of new varieties of woody oil-seed plants.
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Affiliation(s)
- Ping Huang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jie Yang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China
| | - Jiapeng Ke
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China
| | - Li Cai
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China
| | - Yingxiong Hu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China
| | - Jun Ni
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China
| | - Chaoqiong Li
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China
| | - Zeng-Fu Xu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China; Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China, College of Forestry, Guangxi University, Nanning, Guangxi 530004, China.
| | - Mingyong Tang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China; Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Menglun, Mengla 666303, China.
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Huang S, Qiao Y, Lv X, Li J, Han D, Guo D. Transcriptome sequencing and DEG analysis in different developmental stages of floral buds induced by potassium chlorate in Dimocarpus longan. PLANT BIOTECHNOLOGY (TOKYO, JAPAN) 2022; 39:259-272. [PMID: 36349234 PMCID: PMC9592951 DOI: 10.5511/plantbiotechnology.22.0526a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 05/26/2022] [Indexed: 06/16/2023]
Abstract
Potassium chlorate can promote off-season flowering in longan, but the molecular mechanisms are poorly understood. In this study, four-year-old 'Shixia' longan trees were injected in the trunk with potassium chlorate, and terminal buds were sampled and analyzed using transcriptomics and bioinformatics tools. To generate a reference longan transcriptome, we obtained 207,734 paired-end reads covering a total of 58,514,149 bp, which we assembled into 114,445 unigenes. Using this resource, we identified 3,265 differentially expressed genes (DEGs) that were regulated in longan terminal buds in response to potassium chlorate treatment for 2, 6 or 30 days, including 179 transcription factor genes. By reference to the Arabidopsis literature, we then defined 38 longan genes involved in flowering, from which we constructed the longan flowering pathway. According to RNA-seq data, at least 24 of these genes, which participate in multiple signaling pathways, are involved in potassium chlorate-stimulated floral induction, and the differential regulation in terminal buds of ten floral pathway genes (GI, CO, GID1, GA4, GA5, FLC, AP1, LFY, FT and SOC1) was confirmed by qRT-PCR. These data will contribute to an improved understanding of the functions of key genes involved in longan floral induction by potassium chlorate.
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Affiliation(s)
- Shilian Huang
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences; Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs; Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, Guangdong, China
| | - Yanchun Qiao
- Guangzhou Academy of Agricultural Sciences, Guangzhou, Guangdong, China
| | - Xinmin Lv
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences; Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs; Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, Guangdong, China
| | - Jianguang Li
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences; Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs; Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, Guangdong, China
| | - Dongmei Han
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences; Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs; Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, Guangdong, China
| | - Dongliang Guo
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences; Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs; Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, Guangdong, China
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Wang H, Han X, Fu X, Sun X, Chen H, Wei X, Cui S, Liu Y, Guo W, Li X, Xing J, Zhang Y. Overexpression of TaLBD16-4D alters plant architecture and heading date in transgenic wheat. FRONTIERS IN PLANT SCIENCE 2022; 13:911993. [PMID: 36212357 PMCID: PMC9533090 DOI: 10.3389/fpls.2022.911993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 09/02/2022] [Indexed: 06/16/2023]
Abstract
Lateral organ boundaries domain (LBD) proteins, a class of plant-specific transcription factors with a special domain of lateral organ boundaries (LOB), play essential roles in plant growth and development. However, there is little known about the functions of these genes in wheat to date. Our previous study demonstrated that TaLBD16-4D is conducive to increasing lateral root number in wheat. In the present work, we further examined important agronomical traits of the aerial part of transgenic wheat overexpressing TaLBD16-4D. Interestingly, it was revealed that overexpressing TaLBD16-4D could lead to early heading and multiple alterations of plant architecture, including decreased plant height, increased flag leaf size and stem diameter, reduced spike length and tillering number, improved spike density and grain width, and decreased grain length. Moreover, auxin-responsive experiments demonstrated that the expression of TaLBD16-4D in wild-type (WT) wheat plants showed a significant upregulation through 2,4-D treatment. TaLBD16-4D-overexpression lines displayed a hyposensitivity to 2,4-D treatment and reduced shoot gravitropic response. The expressions of a set of auxin-responsive genes were markedly different between WT and transgenic plants. In addition, overexpressing TaLBD16-4D affected the transcript levels of flowering-related genes (TaGI, TaCO1, TaHd1, TaVRN1, TaVRN2, and TaFT1). Notably, the expression of TaGI, TaCO1, TaHd1, TaVRN1, and TaFT1 displayed significant upregulation under IAA treatment. Collectively, our observations indicated that overexpressing TaLBD16-4D could affect aerial architecture and heading time possibly though participating in the auxin pathway.
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Affiliation(s)
- Huifang Wang
- Shandong Provincial Key Laboratory of Dryland Farming Technology, Qingdao Agricultural University, Qingdao, China
| | - Xiaofan Han
- Shandong Provincial Key Laboratory of Dryland Farming Technology, Qingdao Agricultural University, Qingdao, China
| | - Xiaofeng Fu
- Shandong Provincial Key Laboratory of Dryland Farming Technology, Qingdao Agricultural University, Qingdao, China
| | - Xinling Sun
- Shandong Provincial Key Laboratory of Dryland Farming Technology, Qingdao Agricultural University, Qingdao, China
| | - Hailong Chen
- Shandong Provincial Key Laboratory of Dryland Farming Technology, Qingdao Agricultural University, Qingdao, China
| | - Xirui Wei
- Shandong Provincial Key Laboratory of Dryland Farming Technology, Qingdao Agricultural University, Qingdao, China
| | - Shubin Cui
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing, China
| | - Yiguo Liu
- Shandong Provincial Key Laboratory of Dryland Farming Technology, Qingdao Agricultural University, Qingdao, China
| | - Weiwei Guo
- Shandong Provincial Key Laboratory of Dryland Farming Technology, Qingdao Agricultural University, Qingdao, China
| | - Ximei Li
- Shandong Provincial Key Laboratory of Dryland Farming Technology, Qingdao Agricultural University, Qingdao, China
| | - Jiewen Xing
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing, China
| | - Yumei Zhang
- Shandong Provincial Key Laboratory of Dryland Farming Technology, Qingdao Agricultural University, Qingdao, China
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Xue Y, Xue J, Ren X, Li C, Sun K, Cui L, Lyu Y, Zhang X. Nutrient Supply Is Essential for Shifting Tree Peony Reflowering Ahead in Autumn and Sugar Signaling Is Involved. Int J Mol Sci 2022; 23:ijms23147703. [PMID: 35887047 PMCID: PMC9315773 DOI: 10.3390/ijms23147703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/04/2022] [Accepted: 07/11/2022] [Indexed: 01/25/2023] Open
Abstract
The flowering time of tree peony is short and concentrated in spring, which limits the development of its industry. We previously achieved tree peony reflowering in autumn. Here, we further shifted its reflowering time ahead through proper gibberellin (GA) treatment plus nutrient supply. GA treatment alone initiated bud differentiation, but it aborted later, whereas GA plus nutrient (G + N) treatment completed the opening process 38 days before the control group. Through microstructural observation of bud differentiation and starch grains, we concluded that GA plays a triggering role in flowering induction, whereas the nutriment supply ensured the continuous developing for final opening, and both are necessary. We further determined the expression of five floral induction pathway genes and found that PsSOC1 and PsLFY probably played key integral roles in flowering induction and nutrient supply, respectively. Considering the GA signaling, PsGA2ox may be mainly involved in GA regulation, whereas PsGAI may regulate further flower formation after nutrient application. Furthermore, G + N treatment, but not GA alone, inhibited the expression of PsTPS1, a key restricting enzyme in sugar signaling, at the early stage, indicating that sugar signaling is also involved in this process; in addition, GA treatment induced high expression of PsSnRK1, a major nutrient insufficiency indicator, and the induction of PsHXK1, a rate-limiting enzyme for synthesis of sugar signaling substances, further confirmed the nutrient shortage. In short, besides GA application, exogenous nutrient supply is essential to shift tree peony reflowering ahead in autumn under current forcing culture technologies.
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Affiliation(s)
- Yuqian Xue
- Beijing Key Laboratory of Ornamental Germplasm Innovation and Molecular Breeding, China National Engineering Research Center for Floriculture, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China;
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (J.X.); (X.R.); (C.L.); (K.S.); (L.C.)
| | - Jingqi Xue
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (J.X.); (X.R.); (C.L.); (K.S.); (L.C.)
| | - Xiuxia Ren
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (J.X.); (X.R.); (C.L.); (K.S.); (L.C.)
| | - Changyue Li
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (J.X.); (X.R.); (C.L.); (K.S.); (L.C.)
| | - Kairong Sun
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (J.X.); (X.R.); (C.L.); (K.S.); (L.C.)
| | - Litao Cui
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (J.X.); (X.R.); (C.L.); (K.S.); (L.C.)
| | - Yingmin Lyu
- Beijing Key Laboratory of Ornamental Germplasm Innovation and Molecular Breeding, China National Engineering Research Center for Floriculture, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China;
- Correspondence: (Y.L.); (X.Z.); Tel.: +86-130-5191-3339 (Y.L.); +86-10-8210-5944 (X.Z.)
| | - Xiuxin Zhang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (J.X.); (X.R.); (C.L.); (K.S.); (L.C.)
- Correspondence: (Y.L.); (X.Z.); Tel.: +86-130-5191-3339 (Y.L.); +86-10-8210-5944 (X.Z.)
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Comparative analysis of buds transcriptome and identification of two florigen gene AkFTs in Amorphophallus konjac. Sci Rep 2022; 12:6782. [PMID: 35473958 PMCID: PMC9043200 DOI: 10.1038/s41598-022-10817-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 04/13/2022] [Indexed: 11/15/2022] Open
Abstract
Leaves and flowers of Amorphophallus konjac do not develop simultaneously thus unique features can be elucidated through study of flowering transformation in A. konjac. In this study, transcriptome libraries of A. konjac leaf buds (LB) and flower buds (FB) were constructed followed by high-throughput sequencing. A total of 68,906 unigenes with an average length of 920 bp were obtained after library assembly. Out of these genes, 24,622 unigenes had annotation information. A total of 6859 differentially expressed genes (DEGs) were identified through differential expression analysis using LB as control. Notably, 2415 DEGs were upregulated whereas 4444 DEGs were downregulated in the two transcriptomes. Go and KEGG analysis showed that the DEGs belonged to 44 functional categories and were implicated in 98 metabolic pathways and 38 DEGs involved in plant hormone signal transduction. Several genes were mined that may be involved in A. konjac flower bud differentiation and flower organ development. Eight DEGs were selected for verification of RNA-seq results using qRT-PCR analysis. Two FLOWERING LOCUS T (FT) genes named AkFT1 and AkFT2 were identified though homologous analysis may be the florigen gene implicated in modulation of A. konjac flowering. These genes were significantly upregulated in flower buds compared with the expression levels on leaf buds. Overexpression of AkFT genes though heterologous expression in Arabidopsis showed that the transgenics flowered at a very early stage relative to wild type plants. These findings indicate that AkFT1 and AkFT2 function as regulation genes in A. konjac flowering development and the two genes may present similar functions during flowering transition.
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Panda D, Mohanty S, Das S, Sah RP, Kumar A, Behera L, Baig MJ, Tripathy BC. The role of phytochrome-mediated gibberellic acid signaling in the modulation of seed germination under low light stress in rice ( O. sativa L.). PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2022; 28:585-605. [PMID: 35465204 PMCID: PMC8986944 DOI: 10.1007/s12298-022-01167-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 06/07/2023]
Abstract
UNLABELLED Seed germination plays cardinal roles in seedling establishment and their successive growth. However, seed germination is retarded by far-red (FR) enrichment under low light stress, and the inhibitory signalling mechanism remains ambiguous. Our results indicated that low light treatment, both in the open and growth chamber conditions, inhibits rice seed germination by decreasing the gibberellin (GA) contents. To explore the mechanism of GA-deficiency under low light stress, differential expression profiling of GA-anabolic, -catabolic, ABA -anabolic, -catabolic, and SLR1 was investigated, revealing that expression of ABA- anabolic, GA-catabolic genes and SLR1 was upregulated with a simultaneous downregulation of ABA-catabolic and GA-anabolic genes under low light treatment. These results suggested that FR-induced GA inadequacy is resulted by upregulation of SLR1 and GA-catabolism genes consequently increase DELLA that further subsided GA-responses in the germinating rice seeds. Moreover, we provided evidence that FR-induced GA inadequacy demotes rice seed germination by decreasing amylase activity, eventually decreasing the carbohydrate solubilization in the germinating seeds. Finally, we suggest that under low light stress, due to a retarded conversion of phytochrome A to their bioactive form, the ABA-catabolic genes were eventually upregulated with a simultaneous downregulation of GA-anabolic genes. Consequently, a lower GA pool fails to leverage the GA-dependent DELLA degradation, further shutting down the expected GA responses that reduce germination efficiency under FR-enriched light. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s12298-022-01167-7.
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Affiliation(s)
- Darshan Panda
- ICAR-National Rice Research Institute, Cuttack, Odisha India
| | - Soumya Mohanty
- ICAR-National Rice Research Institute, Cuttack, Odisha India
| | - Swagatika Das
- ICAR-National Rice Research Institute, Cuttack, Odisha India
| | | | - Awadhesh Kumar
- ICAR-National Rice Research Institute, Cuttack, Odisha India
| | - Lambodar Behera
- ICAR-National Rice Research Institute, Cuttack, Odisha India
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Gómez-Soto D, Allona I, Perales M. FLOWERING LOCUS T2 Promotes Shoot Apex Development and Restricts Internode Elongation via the 13-Hydroxylation Gibberellin Biosynthesis Pathway in Poplar. FRONTIERS IN PLANT SCIENCE 2022; 12:814195. [PMID: 35185961 PMCID: PMC8853612 DOI: 10.3389/fpls.2021.814195] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 12/22/2021] [Indexed: 06/11/2023]
Abstract
The adaptation and survival of boreal and temperate perennials relies on the precise demarcation of the growing season. Seasonal growth and development are defined by day length and temperature signals. Under long-day conditions in spring, poplar FLOWERING LOCUS T2 (FT2) systemically induces shoot growth. In contrast, FT2 downregulation induced by autumnal short days triggers growth cessation and bud set. However, the molecular role of FT2 in local and long-range signaling is not entirely understood. In this study, the CRISPR/Cas9 editing tool was used to generate FT2 loss of function lines of hybrid poplar. Results indicate that FT2 is essential to promote shoot apex development and restrict internode elongation under conditions of long days. The application of bioactive gibberellins (GAs) to apical buds in FT2 loss of function lines was able to rescue bud set. Expression analysis of GA sensing and metabolic genes and hormone quantification revealed that FT2 boosts the 13-hydroxylation branch of the GA biosynthesis pathway in the shoot apex. Paclobutrazol treatment of WT leaves led to limited internode growth in the stem elongation zone. In mature leaves, FT2 was found to control the GA 13-hydroxylation pathway by increasing GA2ox1 and reducing GA3ox2 expression, causing reduced GA1 levels. We here show that in poplar, the FT2 signal promotes shoot apex development and restricts internode elongation through the GA 13-hydroxylation pathway.
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Affiliation(s)
- Daniela Gómez-Soto
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid, Centro Nacional Instituto de Investigación y Tecnología Agraria y Alimentaria, CNINIA (CSIC), Madrid, Spain
| | - Isabel Allona
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid, Centro Nacional Instituto de Investigación y Tecnología Agraria y Alimentaria, CNINIA (CSIC), Madrid, Spain
- Departamento de Biotecnología-Biología Vegetal, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Madrid, Spain
| | - Mariano Perales
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid, Centro Nacional Instituto de Investigación y Tecnología Agraria y Alimentaria, CNINIA (CSIC), Madrid, Spain
- Departamento de Biotecnología-Biología Vegetal, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Madrid, Spain
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Nasim Z, Fahim M, Hwang H, Susila H, Jin S, Youn G, Ahn JH. Nonsense-mediated mRNA decay modulates Arabidopsis flowering time via the SET DOMAIN GROUP 40-FLOWERING LOCUS C module. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:7049-7066. [PMID: 34270724 DOI: 10.1093/jxb/erab331] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
The nonsense-mediated mRNA decay (NMD) surveillance system clears aberrant mRNAs from the cell, thus preventing the accumulation of truncated proteins. Although loss of the core NMD proteins UP-FRAMESHIFT1 (UPF1) and UPF3 leads to late flowering in Arabidopsis, the underlying mechanism remains elusive. Here, we showed that mutations in UPF1 and UPF3 cause temperature- and photoperiod-independent late flowering. Expression analyses revealed high FLOWERING LOCUS C (FLC) mRNA levels in upf mutants; in agreement with this, the flc mutation strongly suppressed the late flowering of upf mutants. Vernalization accelerated flowering of upf mutants in a temperature-independent manner. FLC transcript levels rose in wild-type plants upon NMD inhibition. In upf mutants, we observed increased enrichment of H3K4me3 and reduced enrichment of H3K27me3 in FLC chromatin. Transcriptome analyses showed that SET DOMAIN GROUP 40 (SDG40) mRNA levels increased in upf mutants, and the SDG40 transcript underwent NMD-coupled alternative splicing, suggesting that SDG40 affects flowering time in upf mutants. Furthermore, NMD directly regulated SDG40 transcript stability. The sdg40 mutants showed decreased H3K4me3 and increased H3K27me3 levels in FLC chromatin, flowered early, and rescued the late flowering of upf mutants. Taken together, these results suggest that NMD epigenetically regulates FLC through SDG40 to modulate flowering time in Arabidopsis.
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Affiliation(s)
- Zeeshan Nasim
- Department of Life Sciences, Korea University, Seoul 02841, Korea
| | - Muhammad Fahim
- Centre for Omic Sciences, Islamia College Peshawar, Pakistan
| | - Hocheol Hwang
- Department of Life Sciences, Korea University, Seoul 02841, Korea
| | - Hendry Susila
- Department of Life Sciences, Korea University, Seoul 02841, Korea
| | - Suhyun Jin
- Department of Life Sciences, Korea University, Seoul 02841, Korea
| | - Geummin Youn
- Department of Life Sciences, Korea University, Seoul 02841, Korea
| | - Ji Hoon Ahn
- Department of Life Sciences, Korea University, Seoul 02841, Korea
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Jiang Y, Liu Y, Gao Y, Peng J, Su W, Yuan Y, Yang X, Zhao C, Wang M, Lin S, Peng Z, Xie F. Gibberellin Induced Transcriptome Profiles Reveal Gene Regulation of Loquat Flowering. Front Genet 2021; 12:703688. [PMID: 34567066 PMCID: PMC8460860 DOI: 10.3389/fgene.2021.703688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 08/24/2021] [Indexed: 11/13/2022] Open
Abstract
Flowering is an integral part of the life cycle of flowering plants, which is essential for plant survival and crop production. Most woody fruit trees such as apples and pears bloom in spring, but loquat blooms in autumn and winter. Gibberellin (GA) plays a key role in the regulation of plant flower formation. In this study, we sprayed loquat plants with exogenous GA3, which resulted in vigorous vegetative growth rather than floral bud formation. We then performed a comprehensive RNA-seq analysis on GA3-treated and control-treated leaves and buds over three time periods to observe the effects of exogenous GA3 application on floral initiation and development. The results showed that 111 differentially expressed genes (DEGs) and 563 DEGs were down-regulated, and 151 DEGs and 506 DEGs were up-regulated in buds and leaves, respectively, upon treatment with GA3. Among those that are homologs of the DELLA-mediated GA signal pathway genes, some may be involved in the positive regulation of flower development, including EjWRKY75, EjFT, EjSOC1, EjAGL24, EjSPL, EjLFY, EjFUL, and EjAP1; while some may be involved in the negative regulation of flower development, including EjDELLA, EjMYC3, EjWRKY12, and EjWRKY13. Finally, by analyzing the co-expression of DEGs and key floral genes EjSOC1s, EjLFYs, EjFULs, EjAP1s, 330 candidate genes that may be involved in the regulation of loquat flowering were screened. These genes belong to 74 gene families, including Cyclin_C, Histone, Kinesin, Lipase_GDSL, MYB, P450, Pkinase, Tubulin, and ZF-HD_dimer gene families. These findings provide new insights into the regulation mechanism of loquat flowering.
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Affiliation(s)
- Yuanyuan Jiang
- Henry Fok College of Biology and Agriculture, Shaoguan University, Shaoguan, China.,State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Yicun Liu
- College of Agriculture and Landscape Architecture, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Yongshun Gao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, China.,Beijing Academy of Forestry and Pomology Sciences, Beijing, China.,Beijing Engineering Research Center for Strawberry, Beijing, China
| | - Jiangrong Peng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Wenbing Su
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, China.,Fruit Research Institute, Fujian Academy of Agricultural Science, Fuzhou, China
| | - Yuan Yuan
- Henry Fok College of Biology and Agriculture, Shaoguan University, Shaoguan, China
| | - Xianghui Yang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Chongbin Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Man Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Shunquan Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Ze Peng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Fangfang Xie
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, China
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10
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Fukazawa J, Ohashi Y, Takahashi R, Nakai K, Takahashi Y. DELLA degradation by gibberellin promotes flowering via GAF1-TPR-dependent repression of floral repressors in Arabidopsis. THE PLANT CELL 2021; 33:2258-2272. [PMID: 33822231 PMCID: PMC8364242 DOI: 10.1093/plcell/koab102] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 03/26/2021] [Indexed: 05/21/2023]
Abstract
Flowering is the developmental transition from the vegetative to the reproductive phase. FLOWERING LOCUS T (FT), SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 (SOC1), and LEAFY (LFY) are floral integrators. These genes are repressed by several floral repressors including EARLY FLOWERING3 (ELF3), SHORT VEGETATIVE PHASE (SVP), TEMPRANILLO1 (TEM1), and TEM2. Although gibberellin (GA) promotes flowering by activating the floral integrator genes, the exact molecular mechanism remains unclear. DELLAs are negative regulators in GA signaling and act as coactivators of the transcription factor GAI ASSOCIATED FACTOR 1 (GAF1). GAs convert the GAF1 complex from a transcriptional activator to a repressor. Here, we show that GAF1 functions in the GA-dependent flowering pathway by regulating FT and SOC1 expression in Arabidopsis thaliana. We identified four flowering repressors, ELF3, SVP, TEM1, and TEM2, as GAF1-target genes. In response to GAs, GAF1 forms a transcriptional repressor complex and promotes the expression of FT and SOC1 through the repression of four flowering repressor genes, ELF3, SVP, TEM1, and TEM2.
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Affiliation(s)
- Jutarou Fukazawa
- Department of Biological Science, Graduate School of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan
- Author for correspondence:
| | - Yuki Ohashi
- Department of Biological Science, Graduate School of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Ryuhei Takahashi
- Department of Biological Science, Graduate School of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Kanako Nakai
- Department of Biological Science, Graduate School of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Yohsuke Takahashi
- Department of Biological Science, Graduate School of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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11
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Su Z, Xiao Q, Shen J, Chen H, Yan S, Huang W. Metabolomics Analysis of Litchi Leaves during Floral Induction Reveals Metabolic Improvement by Stem Girdling. Molecules 2021; 26:4048. [PMID: 34279388 PMCID: PMC8271987 DOI: 10.3390/molecules26134048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/28/2021] [Accepted: 06/29/2021] [Indexed: 11/17/2022] Open
Abstract
Prolonged exposure to cold temperatures often results in a relatively low flowering rate in litchi (Litchi chinensis Sonn.) trees with younger leaves. This study aimed to verify the impact of stem girdling on litchi flowering by identifying and characterizing the induced metabolic changes. After a 60 day exposure to cold treatment at 15 °C/10 °C (12 h/12 h), the flowering rate of the girdled trees was 100%, while that of the non-girdled trees was 20%, indicating that girdling improved litchi flowering at its turning stage. The metabolic profiles of litchi leaves with and without stem girdling during floral induction were compared and 505 metabolites potentially associated with litchi flowering were detected. Most metabolites were involved in the metabolism of starch and sucrose, fatty acid, and phenylpyruvic acid. The metabolic pathways concerned with the biosynthesis of epinephrine, sucrose, and d-maltose were induced in leaves after girdling treatment. The level of galactitol, phenylpyruvic acid, acetyl-CoA, linoleic acid, alpha-linolenic acid, and 13-HPOT biosynthesis remained stable in the leaves from girdled trees but changed drastically in the leaves from non-girdled trees. In addition, 379 metabolites concerning flowering rate were characterized. Metabolism pathways of starch and sucrose, galactose, and linoleic acid are of great significance to the flowering of litchi. Linoleic acid exhibited the most significant variations between girdled trees and non-girdled trees with fold changes of up to 13.62. These results contribute to understanding the biological mechanism of litchi floral induction and the metabolic changes after stem girdling.
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Affiliation(s)
- Zuanxian Su
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | - Qiushen Xiao
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | - Jiyuan Shen
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | - Houbin Chen
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | - Shijuan Yan
- Agro-Biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Wenjie Huang
- Agro-Biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
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12
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Gioppato HA, Dornelas MC. Plant design gets its details: Modulating plant architecture by phase transitions. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 163:1-14. [PMID: 33799013 DOI: 10.1016/j.plaphy.2021.03.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 03/20/2021] [Indexed: 06/12/2023]
Abstract
Plants evolved different strategies to better adapt to the environmental conditions in which they live: the control of their body architecture and the timing of phase change are two important processes that can improve their fitness. As they age, plants undergo two major phase changes (juvenile to adult and adult to reproductive) that are a response to environmental and endogenous signals. These phase transitions are accompanied by alterations in plant morphology and also by changes in physiology and the behavior of gene regulatory networks. Six main pathways involving environmental and endogenous cues that crosstalk with each other have been described as responsible for the control of plant phase transitions: the photoperiod pathway, the autonomous pathway, the vernalization pathway, the temperature pathway, the GA pathway, and the age pathway. However, studies have revealed that sugar is also involved in phase change and the control of branching behavior. In this review, we discuss recent advances in plant biology concerning the genetic and molecular mechanisms that allow plants to regulate phase transitions in response to the environment. We also propose connections between phase transition and plant architecture control.
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Affiliation(s)
- Helena Augusto Gioppato
- University of Campinas (UNICAMP), Biology Institute, Plant Biology Department, Rua Monteiro Lobato, 255 CEP 13, 083-862, Campinas, SP, Brazil
| | - Marcelo Carnier Dornelas
- University of Campinas (UNICAMP), Biology Institute, Plant Biology Department, Rua Monteiro Lobato, 255 CEP 13, 083-862, Campinas, SP, Brazil.
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13
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Beyond the Genetic Pathways, Flowering Regulation Complexity in Arabidopsis thaliana. Int J Mol Sci 2021; 22:ijms22115716. [PMID: 34071961 PMCID: PMC8198774 DOI: 10.3390/ijms22115716] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 05/25/2021] [Accepted: 05/25/2021] [Indexed: 02/06/2023] Open
Abstract
Flowering is one of the most critical developmental transitions in plants’ life. The irreversible change from the vegetative to the reproductive stage is strictly controlled to ensure the progeny’s success. In Arabidopsis thaliana, seven flowering genetic pathways have been described under specific growth conditions. However, the evidence condensed here suggest that these pathways are tightly interconnected in a complex multilevel regulatory network. In this review, we pursue an integrative approach emphasizing the molecular interactions among the flowering regulatory network components. We also consider that the same regulatory network prevents or induces flowering phase change in response to internal cues modulated by environmental signals. In this sense, we describe how during the vegetative phase of development it is essential to prevent the expression of flowering promoting genes until they are required. Then, we mention flowering regulation under suboptimal growing temperatures, such as those in autumn and winter. We next expose the requirement of endogenous signals in flowering, and finally, the acceleration of this transition by long-day photoperiod and temperature rise signals allowing A. thaliana to bloom in spring and summer seasons. With this approach, we aim to provide an initial systemic view to help the reader integrate this complex developmental process.
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14
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Huber M, Nieuwendijk NM, Pantazopoulou CK, Pierik R. Light signalling shapes plant-plant interactions in dense canopies. PLANT, CELL & ENVIRONMENT 2021; 44:1014-1029. [PMID: 33047350 PMCID: PMC8049026 DOI: 10.1111/pce.13912] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 05/09/2023]
Abstract
Plants growing at high densities interact via a multitude of pathways. Here, we provide an overview of mechanisms and functional consequences of plant architectural responses initiated by light cues that occur in dense vegetation. We will review the current state of knowledge about shade avoidance, as well as its possible applications. On an individual level, plants perceive neighbour-associated changes in light quality and quantity mainly with phytochromes for red and far-red light and cryptochromes and phototropins for blue light. Downstream of these photoreceptors, elaborate signalling and integration takes place with the PHYTOCHROME INTERACTING FACTORS, several hormones and other regulators. This signalling leads to the shade avoidance responses, consisting of hyponasty, stem and petiole elongation, apical dominance and life cycle adjustments. Architectural changes of the individual plant have consequences for the plant community, affecting canopy structure, species composition and population fitness. In this context, we highlight the ecological, evolutionary and agricultural importance of shade avoidance.
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Affiliation(s)
- Martina Huber
- Plant Ecophysiology, Dept. BiologyUtrecht UniversityUtrechtThe Netherlands
| | | | | | - Ronald Pierik
- Plant Ecophysiology, Dept. BiologyUtrecht UniversityUtrechtThe Netherlands
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15
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The interplay of phloem-mobile signals in plant development and stress response. Biosci Rep 2021; 40:226464. [PMID: 32955092 PMCID: PMC7538631 DOI: 10.1042/bsr20193329] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 09/16/2020] [Accepted: 09/18/2020] [Indexed: 01/28/2023] Open
Abstract
Plants integrate a variety of biotic and abiotic factors for optimal growth in their given environment. While some of these responses are local, others occur distally. Hence, communication of signals perceived in one organ to a second, distal part of the plant and the coordinated developmental response require an intricate signaling system. To do so, plants developed a bipartite vascular system that mediates the uptake of water, minerals, and nutrients from the soil; transports high-energy compounds and building blocks; and traffics essential developmental and stress signals. One component of the plant vasculature is the phloem. The development of highly sensitive mass spectrometry and molecular methods in the last decades has enabled us to explore the full complexity of the phloem content. As a result, our view of the phloem has evolved from a simple transport path of photoassimilates to a major highway for pathogens, hormones and developmental signals. Understanding phloem transport is essential to comprehend the coordination of environmental inputs with plant development and, thus, ensure food security. This review discusses recent developments in its role in long-distance signaling and highlights the role of some of the signaling molecules. What emerges is an image of signaling paths that do not just involve single molecules but rather, quite frequently an interplay of several distinct molecular classes, many of which appear to be transported and acting in concert.
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16
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Li Q, Li J, Zhang L, Pan C, Yang N, Sun K, He C. Gibberellins are required for dimorphic flower development in Viola philippica. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 303:110749. [PMID: 33487338 DOI: 10.1016/j.plantsci.2020.110749] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 10/26/2020] [Accepted: 10/31/2020] [Indexed: 05/24/2023]
Abstract
Photoperiod is a major determinant of chasmogamous (CH)-cleistogamous (CL) dimorphic flower development in Viola philippica, and only long-day (LD) conditions induce CL flowers. In this study, it was found that the active gibberellin (GA) content in CL floral buds was higher than in CH floral buds formed under short-day (SD) conditions, suggesting that the biosynthesis of active GAs is enhanced by a longer photoperiod and may be associated with dimorphic flower development. Thus, the next step was to molecularly characterize the key V. philippica GA synthesis genes GA 20-oxidase (VpGA20ox) and GA 3-oxidase (VpGA3ox). In terms of the expression of VpGA20ox and VpGA3ox, it was found that the active GAs could be upregulated in developing pistils under both LD and SD conditions to develop functional pistils, and GAs could also accumulate in the stamens under SD conditions. The anthers and the adjacent petals were well developed under SD conditions. In contrast, the above-mentioned floral organs displayed low GA contents under LD conditions and were poorly developed. Although the application of paclobutrazol, an inhibitor of GA synthesis, did not reverse CL development under LD conditions, exogenous GAs could partially trigger the transition from CH to CL flowers under relative SD conditions (≤12 h daylight). This was coupled with the downregulation of B-class MADS-box genes, thereby restraining stamen and petal development. Both VpGA20ox and VpGA3ox exhibited similar expression profiles with B-class MADS-box genes in the development of the stamens and petals. Therefore, in response to photoperiod, GA signaling could affect the expression of B-class homeotic genes and regulate dimorphic flower development in Viola. As a compensation for poorly-developed nectaries, anthers, and petals, filament elongation, style shortness, and inward bending could ensure self-pollination in CL flowers. This work provides new insights into the regulation of CH-CL floral development and the evolutionary significance of the formation of dimorphic flowers.
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Affiliation(s)
- Qiaoxia Li
- Life Science College, Northwest Normal University, Anning East Road 967, Anning, 730070 Lanzhou, Gansu, China.
| | - Jigang Li
- Life Science College, Northwest Normal University, Anning East Road 967, Anning, 730070 Lanzhou, Gansu, China
| | - Li Zhang
- Life Science College, Northwest Normal University, Anning East Road 967, Anning, 730070 Lanzhou, Gansu, China
| | - Chaochao Pan
- Life Science College, Northwest Normal University, Anning East Road 967, Anning, 730070 Lanzhou, Gansu, China
| | - Ning Yang
- Life Science College, Northwest Normal University, Anning East Road 967, Anning, 730070 Lanzhou, Gansu, China
| | - Kun Sun
- Life Science College, Northwest Normal University, Anning East Road 967, Anning, 730070 Lanzhou, Gansu, China.
| | - Chaoying He
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Xiangshan, 100093 Beijing, China; University of Chinese Academy of Sciences, Yuquan Road 19A, 100049 Beijing, China.
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17
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Gawarecka K, Ahn JH. Isoprenoid-Derived Metabolites and Sugars in the Regulation of Flowering Time: Does Day Length Matter? FRONTIERS IN PLANT SCIENCE 2021; 12:765995. [PMID: 35003159 PMCID: PMC8738093 DOI: 10.3389/fpls.2021.765995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 11/22/2021] [Indexed: 05/06/2023]
Abstract
In plants, a diverse set of pathways regulate the transition to flowering, leading to remarkable developmental flexibility. Although the importance of photoperiod in the regulation of flowering time is well known, increasing evidence suggests the existence of crosstalk among the flowering pathways regulated by photoperiod and metabolic pathways. For example, isoprenoid-derived phytohormones (abscisic acid, gibberellins, brassinosteroids, and cytokinins) play important roles in regulating flowering time. Moreover, emerging evidence reveals that other metabolites, such as chlorophylls and carotenoids, as well as sugar metabolism and sugar accumulation, also affect flowering time. In this review, we summarize recent findings on the roles of isoprenoid-derived metabolites and sugars in the regulation of flowering time and how day length affects these factors.
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18
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Yan J, Li X, Zeng B, Zhong M, Yang J, Yang P, Li X, He C, Lin J, Liu X, Zhao X. FKF1 F-box protein promotes flowering in part by negatively regulating DELLA protein stability under long-day photoperiod in Arabidopsis. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2020; 62:1717-1740. [PMID: 32427421 DOI: 10.1111/jipb.12971] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 05/18/2020] [Indexed: 05/23/2023]
Abstract
FLAVIN-BINDING KELCH REPEAT F-BOX 1 (FKF1) encodes an F-box protein that regulates photoperiod flowering in Arabidopsis under long-day conditions (LDs). Gibberellin (GA) is also important for regulating flowering under LDs. However, how FKF1 and the GA pathway work in concert in regulating flowering is not fully understood. Here, we showed that the mutation of FKF1 could cause accumulation of DELLA proteins, which are crucial repressors in GA signaling pathway, thereby reducing plant sensitivity to GA in flowering. Both in vitro and in vivo biochemical analyses demonstrated that FKF1 directly interacted with DELLA proteins. Furthermore, we showed that FKF1 promoted ubiquitination and degradation of DELLA proteins. Analysis of genetic data revealed that FKF1 acted partially through DELLAs to regulate flowering under LDs. In addition, DELLAs exerted a negative feedback on FKF1 expression. Collectively, these findings demonstrate that FKF1 promotes flowering partially by negatively regulating DELLA protein stability under LDs, and suggesting a potential mechanism linking the FKF1 to the GA signaling DELLA proteins.
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Affiliation(s)
- Jindong Yan
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China
- Shenzhen Institute, Hunan University, Shenzhen, 518057, China
| | - Xinmei Li
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China
- Shenzhen Institute, Hunan University, Shenzhen, 518057, China
| | - Bingjie Zeng
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China
- Shenzhen Institute, Hunan University, Shenzhen, 518057, China
| | - Ming Zhong
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China
- Shenzhen Institute, Hunan University, Shenzhen, 518057, China
| | - Jiaxin Yang
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China
- Shenzhen Institute, Hunan University, Shenzhen, 518057, China
| | - Piao Yang
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China
- Shenzhen Institute, Hunan University, Shenzhen, 518057, China
| | - Xin Li
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China
- Shenzhen Institute, Hunan University, Shenzhen, 518057, China
| | - Chongsheng He
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China
| | - Jianzhong Lin
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China
| | - Xuanming Liu
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China
| | - Xiaoying Zhao
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China
- Shenzhen Institute, Hunan University, Shenzhen, 518057, China
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19
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Osnato M, Matias-Hernandez L, Aguilar-Jaramillo AE, Kater MM, Pelaz S. Genes of the RAV Family Control Heading Date and Carpel Development in Rice. PLANT PHYSIOLOGY 2020; 183:1663-1680. [PMID: 32554473 PMCID: PMC7401134 DOI: 10.1104/pp.20.00562] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 06/03/2020] [Indexed: 05/11/2023]
Abstract
In plants, correct formation of reproductive organs is critical for successful seedset and perpetuation of the species. Plants have evolved different molecular mechanisms to coordinate flower and seed development at the proper time of the year. Among the plant-specific RELATED TO ABI3 AND VP1 (RAV) family of transcription factors, only TEMPRANILLO1 (TEM1) and TEM2 have been shown to affect reproductive development in Arabidopsis (Arabidopsis thaliana). They negatively regulate the floral transition through direct repression of FLOWERING LOCUS T and GIBBERELLIN 3-OXIDASE1/2, encoding major components of the florigen. Here we identify RAV genes from rice (Oryza sativa), and unravel their regulatory roles in key steps of reproductive development. Our data strongly suggest that, like TEMs, OsRAV9/OsTEM1 has a conserved function as a repressor of photoperiodic flowering upstream of the floral activators OsMADS14 and Hd3a, through a mechanism reminiscent of that one underlying floral transition in temperate cereals. Furthermore, OsRAV11 and OsRAV12 may have acquired a new function in the differentiation of the carpel and the control of seed size, acting downstream of floral homeotic factors. Alternatively, this function may have been lost in Arabidopsis. Our data reveal conservation of RAV gene function in the regulation of flowering time in monocotyledonous and dicotyledonous plants, but also unveil roles in the development of rice gynoecium.
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Affiliation(s)
- Michela Osnato
- Centre for Research in Agricultural Genomics, Centro de Investigaciones Científicas-Institut de Recerca i Tecnologia Agroalimentàries-Universidad Autónoma de Barcelona-Universidad de Barcelona, Campus Universidad Autónoma de Barcelona, 08193 Barcelona, Spain
- Department BioSciences, University of Milan, 20133 Milan, Italy
| | - Luis Matias-Hernandez
- Centre for Research in Agricultural Genomics, Centro de Investigaciones Científicas-Institut de Recerca i Tecnologia Agroalimentàries-Universidad Autónoma de Barcelona-Universidad de Barcelona, Campus Universidad Autónoma de Barcelona, 08193 Barcelona, Spain
| | - Andrea Elizabeth Aguilar-Jaramillo
- Centre for Research in Agricultural Genomics, Centro de Investigaciones Científicas-Institut de Recerca i Tecnologia Agroalimentàries-Universidad Autónoma de Barcelona-Universidad de Barcelona, Campus Universidad Autónoma de Barcelona, 08193 Barcelona, Spain
| | - Martin M Kater
- Department BioSciences, University of Milan, 20133 Milan, Italy
| | - Soraya Pelaz
- Centre for Research in Agricultural Genomics, Centro de Investigaciones Científicas-Institut de Recerca i Tecnologia Agroalimentàries-Universidad Autónoma de Barcelona-Universidad de Barcelona, Campus Universidad Autónoma de Barcelona, 08193 Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain
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20
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Jing D, Chen W, Hu R, Zhang Y, Xia Y, Wang S, He Q, Guo Q, Liang G. An Integrative Analysis of Transcriptome, Proteome and Hormones Reveals Key Differentially Expressed Genes and Metabolic Pathways Involved in Flower Development in Loquat. Int J Mol Sci 2020; 21:E5107. [PMID: 32698310 PMCID: PMC7404296 DOI: 10.3390/ijms21145107] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/15/2020] [Accepted: 07/16/2020] [Indexed: 11/17/2022] Open
Abstract
Flower development is a vital developmental process in the life cycle of woody perennials, especially fruit trees. Herein, we used transcriptomic, proteomic, and hormone analyses to investigate the key candidate genes/proteins in loquat (Eriobotrya japonica) at the stages of flower bud differentiation (FBD), floral bud elongation (FBE), and floral anthesis (FA). Comparative transcriptome analysis showed that differentially expressed genes (DEGs) were mainly enriched in metabolic pathways of hormone signal transduction and starch and sucrose metabolism. Importantly, the DEGs of hormone signal transduction were significantly involved in the signaling pathways of auxin, gibberellins (GAs), cytokinin, ethylene, abscisic acid (ABA), jasmonic acid, and salicylic acid. Meanwhile, key floral integrator genes FLOWERING LOCUS T (FT) and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 (SOC1) and floral meristem identity genes SQUAMOSA PROMOTER BINDING LIKE (SPL), LEAFY (LFY), APETALA1 (AP1), and AP2 were significantly upregulated at the FBD stage. However, key floral organ identity genes AGAMOUS (AG), AP3, and PISTILLATA (PI) were significantly upregulated at the stages of FBE and FA. Furthermore, transcription factors (TFs) such as bHLH (basic helix-loop-helix), NAC (no apical meristem (NAM), Arabidopsis transcription activation factor (ATAF1/2) and cup-shaped cotyledon (CUC2)), MYB_related (myeloblastosis_related), ERF (ethylene response factor), and C2H2 (cysteine-2/histidine-2) were also significantly differentially expressed. Accordingly, comparative proteomic analysis of differentially accumulated proteins (DAPs) and combined enrichment of DEGs and DAPs showed that starch and sucrose metabolism was also significantly enriched. Concentrations of GA3 and zeatin were high before the FA stage, but ABA concentration remained high at the FA stage. Our results provide abundant sequence resources for clarifying the underlying mechanisms of the flower development in loquat.
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Affiliation(s)
- Danlong Jing
- Key Laboratory of Horticulture Science for Southern Mountains Regions of Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, Beibei, Chongqing 400715, China; (D.J.); (W.C.); (Y.X.); (S.W.); (Q.H.)
- Academy of Agricultural Sciences of Southwest University, State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Beibei, Chongqing 400715, China; (R.H.); (Y.Z.)
| | - Weiwei Chen
- Key Laboratory of Horticulture Science for Southern Mountains Regions of Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, Beibei, Chongqing 400715, China; (D.J.); (W.C.); (Y.X.); (S.W.); (Q.H.)
- Academy of Agricultural Sciences of Southwest University, State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Beibei, Chongqing 400715, China; (R.H.); (Y.Z.)
| | - Ruoqian Hu
- Academy of Agricultural Sciences of Southwest University, State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Beibei, Chongqing 400715, China; (R.H.); (Y.Z.)
| | - Yuchen Zhang
- Academy of Agricultural Sciences of Southwest University, State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Beibei, Chongqing 400715, China; (R.H.); (Y.Z.)
| | - Yan Xia
- Key Laboratory of Horticulture Science for Southern Mountains Regions of Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, Beibei, Chongqing 400715, China; (D.J.); (W.C.); (Y.X.); (S.W.); (Q.H.)
- Academy of Agricultural Sciences of Southwest University, State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Beibei, Chongqing 400715, China; (R.H.); (Y.Z.)
| | - Shuming Wang
- Key Laboratory of Horticulture Science for Southern Mountains Regions of Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, Beibei, Chongqing 400715, China; (D.J.); (W.C.); (Y.X.); (S.W.); (Q.H.)
- Academy of Agricultural Sciences of Southwest University, State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Beibei, Chongqing 400715, China; (R.H.); (Y.Z.)
| | - Qiao He
- Key Laboratory of Horticulture Science for Southern Mountains Regions of Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, Beibei, Chongqing 400715, China; (D.J.); (W.C.); (Y.X.); (S.W.); (Q.H.)
- Academy of Agricultural Sciences of Southwest University, State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Beibei, Chongqing 400715, China; (R.H.); (Y.Z.)
| | - Qigao Guo
- Key Laboratory of Horticulture Science for Southern Mountains Regions of Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, Beibei, Chongqing 400715, China; (D.J.); (W.C.); (Y.X.); (S.W.); (Q.H.)
- Academy of Agricultural Sciences of Southwest University, State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Beibei, Chongqing 400715, China; (R.H.); (Y.Z.)
| | - Guolu Liang
- Key Laboratory of Horticulture Science for Southern Mountains Regions of Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, Beibei, Chongqing 400715, China; (D.J.); (W.C.); (Y.X.); (S.W.); (Q.H.)
- Academy of Agricultural Sciences of Southwest University, State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Beibei, Chongqing 400715, China; (R.H.); (Y.Z.)
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Yang T, Sun Y, Wang Y, Zhou L, Chen M, Bian Z, Lian Y, Xuan L, Yuan G, Wang X, Wang C. AtHSPR is involved in GA- and light intensity-mediated control of flowering time and seed set in Arabidopsis. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:3543-3559. [PMID: 32157303 PMCID: PMC7475253 DOI: 10.1093/jxb/eraa128] [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: 08/01/2019] [Accepted: 03/05/2020] [Indexed: 05/15/2023]
Abstract
Flowering is a dynamic and synchronized process, the timing of which is finely tuned by various environmental signals. A T-DNA insertion mutant in Arabidopsis HEAT SHOCK PROTEIN-RELATED (AtHSPR) exhibited late-flowering phenotypes under both long-day (LD) and short-day (SD) conditions compared to the wild-type, while over-expression of AtHSPR promoted flowering. Exogenous application of gibberellin (GA) partially rescued the late-flowering mutant phenotype under both LD and SD conditions, suggesting that AtHSPR is involved in GA biosynthesis and/or the GA signaling that promotes flowering. Under SD or low-light conditions, the Athspr mutant exhibited late flowering together with reduced pollen viability and seed set, defective phenotypes that were partially rescued by GA treatment. qRT-PCR assays confirmed that GA biosynthetic genes were down-regulated, that GA catabolic genes were up-regulated, and that the levels of bioactive GA and its intermediates were decreased in Athspr under both SD and low-light/LD, further suggesting that AtHSPR could be involved in the GA pathway under SD and low-light conditions. Furthermore, AtHSPR interacted in vitro with OFP1 and KNAT5, which are transcriptional repressors of GA20ox1 in GA biosynthesis. Taken together, our findings demonstrate that AtHSPR plays a positive role in GA- and light intensity-mediated regulation of flowering and seed set.
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Affiliation(s)
- Tao Yang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Yan Sun
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Yongli Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Lina Zhou
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Mengya Chen
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Zhiyuan Bian
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Yuke Lian
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Lijuan Xuan
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Guoqiang Yuan
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Xinyu Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
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Luo C, Liu H, Ren J, Chen D, Cheng X, Sun W, Hong B, Huang C. Cold-inducible expression of an Arabidopsis thaliana AP2 transcription factor gene, AtCRAP2, promotes flowering under unsuitable low-temperatures in chrysanthemum. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 146:220-230. [PMID: 31760343 DOI: 10.1016/j.plaphy.2019.11.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 10/22/2019] [Accepted: 11/14/2019] [Indexed: 05/23/2023]
Abstract
Flowering time is regulated by biotic and abiotic stresses and affected by the ambient temperature. For chrysanthemum, a low ambient growth temperature can cause a flowering delay, which limits the annual commercial production. Therefore, it is important to improve the low-temperature flowering capability of chrysanthemum through genetic modifications. Here, we isolated a natural variation of a CRT/DRE-binding factor (CBF/DREB) 3 gene, CRAP2, from the Arabidopsis thaliana accession Condara (190AV) that encodes a stop codon at position 151 of the CBF3 protein. Unlike AtCBF3, the overexpression AtCRAP2 in Arabidopsis did not cause detectable growth retardation nor delayed flowering and it conferred cold tolerance. The cold-inducible expression of AtCRAP2 in chrysanthemum promoted flowering under short-day conditions with a low 15 °C nighttime temperature. RNA-sequencing of rd29A:AtCRAP2 and qRT-PCR assays of flowering time-related genes and AtCRAP2 expressed at an ambient temperature revealed that AtCRAP2 positively affected SOC1 and FTL3, thereby promoting flowering under low temperature stress and short-day conditions. These results indicate that DREB genes can be used in the genetic engineering of crop plants without accompanying negative effects by modifying the encoded proteins' C termini.
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Affiliation(s)
- Chang Luo
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing Engineering Research Center of Functional Floriculture, Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing, 100097, China
| | - Hua Liu
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing Engineering Research Center of Functional Floriculture, Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing, 100097, China
| | - Junan Ren
- Beijing Industrial Technology Research Institute, Beijing, 101111, China
| | - Dongliang Chen
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing Engineering Research Center of Functional Floriculture, Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing, 100097, China
| | - Xi Cheng
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing Engineering Research Center of Functional Floriculture, Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing, 100097, China
| | - Wei Sun
- Yuquan School of the Capital Normal University, Beijing, 100195, China
| | - Bo Hong
- Department of Ornamental Horticulture, China Agricultural University, Beijing, 100193, China
| | - Conglin Huang
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing Engineering Research Center of Functional Floriculture, Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing, 100097, China.
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Bao S, Hua C, Shen L, Yu H. New insights into gibberellin signaling in regulating flowering in Arabidopsis. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2020; 62:118-131. [PMID: 31785071 DOI: 10.1111/jipb.12892] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 11/28/2019] [Indexed: 05/18/2023]
Abstract
In angiosperms, floral transition is a key developmental transition from the vegetative to reproductive growth, and requires precise regulation to maximize the reproductive success. A complex regulatory network governs this transition through integrating flowering pathways in response to multiple exogenous and endogenous cues. Phytohormones are essential for proper plant developmental regulation and have been extensively studied for their involvement in the floral transition. Among various phytohormones, gibberellin (GA) plays a major role in affecting flowering in the model plant Arabidopsis thaliana. The GA pathway interact with other flowering genetic pathways and phytohormone signaling pathways through either DELLA proteins or mediating GA homeostasis. In this review, we summarize the recent advances in understanding the mechanisms of DELLA-mediated GA pathway in flowering time control in Arabidopsis, and discuss its possible link with other phytohormone pathways during the floral transition.
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Affiliation(s)
- Shengjie Bao
- Department of Biological Sciences, National University of Singapore, Singapore, 117543, Singapore
| | - Changmei Hua
- Department of Biological Sciences, National University of Singapore, Singapore, 117543, Singapore
| | - Lisha Shen
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore, 117604, Singapore
| | - Hao Yu
- Department of Biological Sciences, National University of Singapore, Singapore, 117543, Singapore
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore, 117604, Singapore
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Štorchová H, Hubáčková H, Abeyawardana OAJ, Walterová J, Vondráková Z, Eliášová K, Mandák B. Chenopodium ficifolium flowers under long days without upregulation of FLOWERING LOCUS T (FT) homologs. PLANTA 2019; 250:2111-2125. [PMID: 31584118 DOI: 10.1007/s00425-019-03285-1] [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: 03/06/2019] [Accepted: 09/25/2019] [Indexed: 06/10/2023]
Abstract
Chenopodium ficifoliumflowered under long days despite much lower expression ofFLOWERING LOCUS Thomolog than under short days. Frequent duplications of the FLOWERING LOCUS T (FT) gene across various taxonomic lineages resulted in FT paralogs with floral repressor function, whereas others duplicates maintained their floral-promoting role. The FT gene has been confirmed as the inducer of photoperiodic flowering in most angiosperms analyzed to date. We identified all FT homologs in the transcriptome of Chenopodium ficifolium and in the genome of Chenopodium suecicum, which are closely related to diploid progenitors of the tetraploid crop Chenopodium quinoa, and estimated their expression during photoperiodic floral induction. We found that expression of FLOWERING LOCUS T like 1 (FTL1), the ortholog of the sugar beet floral activator BvFT2, correlated with floral induction in C. suecicum and short-day C. ficifolium, but not with floral induction in C. ficifolium with accelerated flowering under long days. This C. ficifolium accession was induced to flowering without the concomitant upregulation of any FT homolog.
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Affiliation(s)
- Helena Štorchová
- Institute of Experimental Botany, Czech Academy of Sciences, Rozvojová 263, Praha 6, Lysolaje, 165 00, Czech Republic.
| | - Helena Hubáčková
- Institute of Experimental Botany, Czech Academy of Sciences, Rozvojová 263, Praha 6, Lysolaje, 165 00, Czech Republic
| | - Oushadee A J Abeyawardana
- Institute of Experimental Botany, Czech Academy of Sciences, Rozvojová 263, Praha 6, Lysolaje, 165 00, Czech Republic
| | - Jana Walterová
- Institute of Experimental Botany, Czech Academy of Sciences, Rozvojová 263, Praha 6, Lysolaje, 165 00, Czech Republic
| | - Zuzana Vondráková
- Institute of Experimental Botany, Czech Academy of Sciences, Rozvojová 263, Praha 6, Lysolaje, 165 00, Czech Republic
| | - Kateřina Eliášová
- Institute of Experimental Botany, Czech Academy of Sciences, Rozvojová 263, Praha 6, Lysolaje, 165 00, Czech Republic
| | - Bohumil Mandák
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6, Suchdol, 165 21, Czech Republic
- Institute of Botany, Czech Academy of Sciences, Zámek 1, 252 43, Průhonice, Czech Republic
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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.
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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.
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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.
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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
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Bao S, Hua C, Huang G, Cheng P, Gong X, Shen L, Yu H. Molecular Basis of Natural Variation in Photoperiodic Flowering Responses. Dev Cell 2019; 50:90-101.e3. [PMID: 31178399 DOI: 10.1016/j.devcel.2019.05.018] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 02/11/2019] [Accepted: 05/06/2019] [Indexed: 12/21/2022]
Abstract
Plants exhibit different flowering behaviors in response to variable photoperiods across a wide geographical range. Here, we identify MYC3, a bHLH transcription factor, and its cis-element form the long-sought regulatory module responsible for cis-regulatory changes at the florigen gene FLOWERING LOCUS T (FT) that mediate natural variation in photoperiodic flowering responses in Arabidopsis. MYC3 is stabilized by DELLAs in the gibberellin pathway to suppress FT through binding the ACGGAT motif and antagonizing CONSTANS (CO) activation. Changing photoperiods modulate the relative abundance of MYC3 and CO, thus determining either of them as the predominant regulator for FT expression under different day lengths. Cis-regulatory changes in the MYC3 binding site at FT are associated with natural variation in day-length requirement for flowering in Arabidopsis accessions. Our findings reveal that environmental and developmental signals converge at MYC3 suppression of FT, an elementary event underlying natural variation in photoperiodic flowering responses.
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Affiliation(s)
- Shengjie Bao
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore 117543, Singapore
| | - Changmei Hua
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore 117543, Singapore
| | - Gengqing Huang
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore 117543, Singapore; Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
| | - Peng Cheng
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore 117543, Singapore
| | - Ximing Gong
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore 117543, Singapore
| | - Lisha Shen
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore 117604, Singapore
| | - Hao Yu
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore 117543, Singapore; Temasek Life Sciences Laboratory, National University of Singapore, Singapore 117604, Singapore.
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MtGA2ox10 encoding C20-GA2-oxidase regulates rhizobial infection and nodule development in Medicago truncatula. Sci Rep 2019; 9:5952. [PMID: 30976084 PMCID: PMC6459840 DOI: 10.1038/s41598-019-42407-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 04/01/2019] [Indexed: 01/03/2023] Open
Abstract
Gibberellin (GA) plays a controversial role in the legume-rhizobium symbiosis. Recent studies have shown that the GA level in legumes must be precisely controlled for successful rhizobial infection and nodule organogenesis. However, regulation of the GA level via catabolism in legume roots has not been reported to date. Here, we investigate a novel GA inactivating C20-GA2-oxidase gene MtGA2ox10 in Medicago truncatula. RNA sequencing analysis and quantitative polymerase chain reaction revealed that MtGA2ox10 was induced as early as 6 h post-inoculation (hpi) of rhizobia and reached peak transcript abundance at 12 hpi. Promoter::β-glucuronidase fusion showed that the promoter activity was localized in the root infection/differentiation zone during the early stage of rhizobial infection and in the vascular bundle of the mature nodule. The CRISPR/Cas9-mediated deletion mutation of MtGA2ox10 suppressed infection thread formation, which resulted in reduced development and retarded growth of nodules on the Agrobacterium rhizogenes-transformed roots. Over-expression of MtGA2ox10 in the stable transgenic plants caused dwarfism, which was rescued by GA3 application, and increased infection thread formation but inhibition of nodule development. We conclude that MtGA2ox10 plays an important role in the rhizobial infection and the development of root nodules through fine catabolic tuning of GA in M. truncatula.
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Lu Y, Chen W, Zhao L, Yao J, Li Y, Yang W, Liu Z, Zhang Y, Sun J. Different divergence events for three pairs of PEBPs in Gossypium as implied by evolutionary analysis. Genes Genomics 2019; 41:445-458. [PMID: 30610620 DOI: 10.1007/s13258-018-0775-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 12/06/2018] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The phosphatidylethanolamine-binding protein (PEBP) gene family plays a crucial role in seed germination, reproductive transformation, and other important developmental processes in plants, but its distribution in Gossypium genomes or species, evolutionary properties, and the fates of multiple duplicated genes remain unclear. OBJECTIVES The primary objectives of this study were to elucidate the distribution and characteristics of PEBP genes in Gossypium, as well as the evolutionary pattern of duplication and deletion, and functional differentiation of PEBPs in plants. METHODS Using the PEBP protein sequences in Arabidopsis thaliana as queries, blast alignment was carried out for the identification of PEBP genes in four sequenced cotton species. Using the primers designed according to the PEBP genome sequences, PEBP genes were cloned from 15 representative genomes of Gossypium genus, and the gene structure, CDS sequence, protein sequence and properties were predicted and phylogenetic analysis was performed. Taking PEBP proteins of grape as reference, grouping of orthologous gene, analysis of phylogeny and divergence of PEBPs in nine species were conducted to reconstruct the evolutionary pattern of PEBP genes in plants. RESULTS We identified and cloned 160 PEBPs from 15 cotton species, and the phylogenetic analysis showed that the genes could be classified into the following three subfamilies: MFT-like, FT-like and TFL1-like. There were eight single orthologous group (OG) members in each diploid and 16 double OG members in each tetraploid. An analysis of the expression and selective pressure indicated that expression divergence and strong purification selection within the same OG presented in the PEBP gene family. CONCLUSION An evolutionary pattern of duplication and deletion of the PEBP family in the evolutionary history of Gossypium was suggested, and three pairs of genes resulted from different whole-genome duplication events.
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Affiliation(s)
- Youjun Lu
- College of Agriculture/The Key Laboratory of Oasis Eco-Agriculture, Shihezi University, Shihezi, 832003, China
- Cotton Research Institute of the Chinese Academy of Agricultural Sciences (CAAS)/State Key Laboratory of Cotton Biology, Anyang, 455000, Henan, China
- Research Base, Anyang Institute of Technology, State Key Laboratory of Cotton Biology, Huanghe Road, Anyang, 455000, Henan, China
| | - Wei Chen
- Cotton Research Institute of the Chinese Academy of Agricultural Sciences (CAAS)/State Key Laboratory of Cotton Biology, Anyang, 455000, Henan, China
| | - Lanjie Zhao
- Cotton Research Institute of the Chinese Academy of Agricultural Sciences (CAAS)/State Key Laboratory of Cotton Biology, Anyang, 455000, Henan, China
| | - Jinbo Yao
- Cotton Research Institute of the Chinese Academy of Agricultural Sciences (CAAS)/State Key Laboratory of Cotton Biology, Anyang, 455000, Henan, China
| | - Yan Li
- Cotton Research Institute of the Chinese Academy of Agricultural Sciences (CAAS)/State Key Laboratory of Cotton Biology, Anyang, 455000, Henan, China
| | - Weijun Yang
- Research Base, Anyang Institute of Technology, State Key Laboratory of Cotton Biology, Huanghe Road, Anyang, 455000, Henan, China
| | - Ziyang Liu
- University of Saskatchewan, Saskatoon, SK, S7N 5A5, Canada
| | - Yongshan Zhang
- Cotton Research Institute of the Chinese Academy of Agricultural Sciences (CAAS)/State Key Laboratory of Cotton Biology, Anyang, 455000, Henan, China.
| | - Jie Sun
- College of Agriculture/The Key Laboratory of Oasis Eco-Agriculture, Shihezi University, Shihezi, 832003, China.
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Xue J, Li T, Wang S, Xue Y, Hu F, Zhang X. Elucidation of the mechanism of reflowering in tree peony (Paeonia suffruticosa) 'Zi Luo Lan' by defoliation and gibberellic acid application. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 132:571-578. [PMID: 30326436 DOI: 10.1016/j.plaphy.2018.10.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 09/03/2018] [Accepted: 10/06/2018] [Indexed: 05/06/2023]
Abstract
In this study, the reflowering mechanism of tree peony (Paeonia suffruticosa 'Zi Luo Lan') after defoliation and gibberellic acid (GA) application (autumn-flowering treatment) was investigated by monitoring the morphological changes, measuring the endogenous GA3 and abscisic acid (ABA) contents, and determining the expression patterns of six GA- and two ABA-related genes. The results show that autumn-flowering treatment induced tree peony reflowering in autumn, which was accompanied by nutrient absorption in buds. The application of exogenous GA3 induced a simultaneous increase in GA3 and decrease in ABA levels, suggesting that the high ratios of GA3/ABA may play a key role in inducing tree peony reflowering. RT-qPCR analysis shows that PsCPS and PsGA2ox were significantly induced and inhibited by GA3 application, respectively, which supports the hypothesis that GA3 treatment induces endogenous GA3 production. In addition, GA3 treatment inhibited the expression of the PsGID1c, but its effect on PsGAI1 was limited, whereas the expression of PsGAMYB could be GA- or ABA-related. Furthermore, autumn-flowering treatment significantly inhibited the expression of PsNCED and PsbZIP, which coincides with the observed changes in ABA levels. Therefore, we postulate that autumn-flowering treatment induces tree peony reflowering by inhibiting the function of ABA accumulation and signaling.
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Affiliation(s)
- Jingqi Xue
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, China; Department of Peony, Chinese Academy of Agricultural Sciences, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China
| | - Tingting Li
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, China; Department of Peony, Chinese Academy of Agricultural Sciences, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China; Institute of Landscape Architecture, Nanjing Forestry University, Nanjing, 210037, China
| | - Shunli Wang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, China; Department of Peony, Chinese Academy of Agricultural Sciences, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China
| | - Yuqian Xue
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, China; Department of Peony, Chinese Academy of Agricultural Sciences, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China
| | - Fengrong Hu
- Institute of Landscape Architecture, Nanjing Forestry University, Nanjing, 210037, China.
| | - Xiuxin Zhang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, China; Department of Peony, Chinese Academy of Agricultural Sciences, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
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Lymperopoulos P, Msanne J, Rabara R. Phytochrome and Phytohormones: Working in Tandem for Plant Growth and Development. FRONTIERS IN PLANT SCIENCE 2018; 9:1037. [PMID: 30100912 PMCID: PMC6072860 DOI: 10.3389/fpls.2018.01037] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 06/26/2018] [Indexed: 05/07/2023]
Abstract
Being sessile organisms, plants need to continually adapt and modulate their rate of growth and development in accordance with the changing environmental conditions, a phenomenon referred to as plasticity. Plasticity in plants is a highly complex process that involves a well-coordinated interaction between different signaling pathways, the spatiotemporal involvement of phytohormones and cues from the environment. Though research studies are being carried out over the years to understand how plants perceive the signals from changing environmental conditions and activate plasticity, such remain a mystery to be resolved. Among all environmental cues, the light seems to be the stand out factor influencing plant growth and development. During the course of evolution, plants have developed well-equipped signaling system that enables regulation of both quantitative and qualitative differences in the amount of perceived light. Light influences essential developmental switches in plants ranging from germination or transition to flowering, photomorphogenesis, as well as switches in response to shade avoidances and architectural changes occurring during phototropism. Abscisic acid (ABA) is controlling seed germination and is regulated by light. Furthermore, circadian clock adds another level of regulation to plant growth by integrating light signals with different hormonal pathways. MYB96 has been identified as a regulator of circadian gating of ABA-mediated responses in plants by binding to the TIMING OF CAB EXPRESSION 1(TOC1) promoter. This review will present a representative regulatory model, highlight the successes achieved in employing novel strategies to dissect the levels of interaction and provide perspective for future research on phytochrome-phytohormones relationships toward facilitating plant growth, development, and function under abiotic-biotic stresses.
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Affiliation(s)
| | - Joseph Msanne
- New Mexico Consortium, Los Alamos, NM, United States
| | - Roel Rabara
- New Mexico Consortium, Los Alamos, NM, United States
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Dixon LE, Farré A, Finnegan EJ, Orford S, Griffiths S, Boden SA. Developmental responses of bread wheat to changes in ambient temperature following deletion of a locus that includes FLOWERING LOCUS T1. PLANT, CELL & ENVIRONMENT 2018; 41:1715-1725. [PMID: 29314053 PMCID: PMC6033019 DOI: 10.1111/pce.13130] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 11/16/2017] [Accepted: 11/26/2017] [Indexed: 05/18/2023]
Abstract
FLOWERING LOCUS T (FT) is a central integrator of environmental signals that regulates the timing of vegetative to reproductive transition in flowering plants. In model plants, these environmental signals have been shown to include photoperiod, vernalization, and ambient temperature pathways, and in crop species, the integration of the ambient temperature pathway remains less well understood. In hexaploid wheat, at least 5 FT-like genes have been identified, each with a copy on the A, B, and D genomes. Here, we report the characterization of FT-B1 through analysis of FT-B1 null and overexpression genotypes under different ambient temperature conditions. This analysis has identified that the FT-B1 alleles perform differently under diverse environmental conditions; most notably, the FT-B1 null produces an increase in spikelet and tiller number when grown at lower temperature conditions. Additionally, absence of FT-B1 facilitates more rapid germination under both light and dark conditions. These results provide an opportunity to understand the FT-dependent pathways that underpin key responses of wheat development to changes in ambient temperature. This is particularly important for wheat, for which development and grain productivity are sensitive to changes in temperature.
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Wu M, Liu D, Abdul W, Upreti S, Liu Y, Song G, Wu J, Liu B, Gan Y. PIL5 represses floral transition in Arabidopsis under long day conditions. Biochem Biophys Res Commun 2018; 499:513-518. [PMID: 29588173 DOI: 10.1016/j.bbrc.2018.03.179] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 03/23/2018] [Indexed: 11/17/2022]
Abstract
PHYTOCHROME INTERACING FACTOR 3 LIKE 5 (PIL5), also named PHYTOCHROME INTERACTING FACTOR 1 (PIF1) is an important b-HLH transcription factor in Arabidopsis thaliana. Here we show that mutant of pil5-1 displays early flowering phenotype. We demonstrate that the expressions of the major flowering promoter genes [FLOWERING LOCUS T (FT), SUPPRESOR OF OVEREXPRESSION OF CO 1 (SOC1), and LEAFY (LFY)] are upregulated in the mutant of pil5-1. There is a significant increase of the mRNA of PIL5 in the mutants of co2-1, ft-10, soc1-2, and lfy-4. These changes provide the molecular evidence that PIL5 interacts with the flowering regulators to control flowering time. Moreover, it is shown in our results that PIL5 mutation mediates the increased contents of gibberellic acid (GA). Which is further supported by the qRT-PCR analysis, an increased transcriptome level of the GA biosynthesis genes (GA3ox1, GA3ox2, GA20ox1, GA20ox2, and GA20ox3) has been observed in the pil5-1 mutants as compared to the wild type. Collectively, PIL5 is involved in floral transition interacting with flowering integrators and GA.
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Affiliation(s)
- Minjie Wu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Dongdong Liu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Wakeel Abdul
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Sakila Upreti
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Yihua Liu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Ge Song
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Junyu Wu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Bohan Liu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Yinbo Gan
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China.
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34
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Weber K, Burow M. Nitrogen - essential macronutrient and signal controlling flowering time. PHYSIOLOGIA PLANTARUM 2018; 162:251-260. [PMID: 29095491 DOI: 10.1111/ppl.12664] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 10/10/2017] [Accepted: 10/25/2017] [Indexed: 06/07/2023]
Abstract
Nitrogen, as limiting nutrient for plant growth and crop yield, is a main component of fertilizers and heavily used in modern agriculture. Early reports from over-application of fertilizers in crop production have shown to repress the transition from vegetative to reproductive phase. For the model plant Arabidopsis thaliana, there is evidence that low nitrogen conditions promote early flowering, while high nitrogen as well as nitrogen starvation conditions display the opposite effect. To gain a better understanding of how nitrogen affects the onset of flowering, we reviewed the existing literature for A. thaliana and carried out a meta-analysis on available transcriptomics data, seeking for potential genes and pathways involved in both nitrogen responses and flowering time control. With this strategy, we aimed at identifying potential gateways for integration of nitrogen signaling and potential regulators that might link the regulatory networks controlling nitrogen and flowering in A. thaliana. We found that photoperiodic pathway genes have high potential to be involved in nitrogen-dependent flowering.
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Affiliation(s)
- Konrad Weber
- DynaMo Center, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark
- Copenhagen Plant Science Centre, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Meike Burow
- DynaMo Center, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark
- Copenhagen Plant Science Centre, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark
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Poirier BC, Feldman MJ, Lange BM. bHLH093/NFL and bHLH061 are required for apical meristem function in Arabidopsis thaliana. PLANT SIGNALING & BEHAVIOR 2018; 13:e1486146. [PMID: 30160638 PMCID: PMC6128687 DOI: 10.1080/15592324.2018.1486146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The basic Helix-Loop-Helix (bHLH) transcription factors SCREAM/ICE1 and SCREAM2 have well-characterized roles in the terminal differentiation of stomatal guard cells in Arabidopsis thaliana. Here we report on the characterization of the functional roles of the remaining members of sub-group IIIB, bHLH093 and bHLH061. The bhlh093/bhlh061 double mutant failed to produce a primary inflorescence shoot and displayed greater phenotypic severity than bhlh093 and bhlh061 single mutants. An ultrastructural investigation revealed structural defects that develop in tissues surrounding the meristem prior to inflorescence emergence. The transition to flowering was restored in bhlh093/bhlh061 with the application of gibberellin to the apex. We also demonstrate that gibberellin application alleviates structural defects that develop in tissues surrounding the meristem and restore meristem activity. Furthermore, the bhlh093/bhlh061 double mutant was affected by delayed flowering, and the severity of the phenotype correlated with photoperiod and light intensity. Our results indicate that bHLH093 and bHLH061 function in the gibberellin-mediated establishment of functional apical meristems during the transition from vegetative to reproductive growth.
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Affiliation(s)
- B. C. Poirier
- Institute of Biological Chemistry and M.J. Murdock Metabolomics Laboratory, Washington State University, Pullman, WA, USA
- CONTACT B. Markus Lange Professor, Institute of Biological Chemistry, Murdock Metabolomics Laboratory, Washington State University Co-Director, M.J., Pullman, WA 99164-6340, Phone: (509) 335-3794; Fax: (509) 335-7643
| | - M. J. Feldman
- Institute of Biological Chemistry and M.J. Murdock Metabolomics Laboratory, Washington State University, Pullman, WA, USA
| | - B. M. Lange
- Institute of Biological Chemistry and M.J. Murdock Metabolomics Laboratory, Washington State University, Pullman, WA, USA
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36
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Mawphlang OIL, Kharshiing EV. Photoreceptor Mediated Plant Growth Responses: Implications for Photoreceptor Engineering toward Improved Performance in Crops. FRONTIERS IN PLANT SCIENCE 2017; 8:1181. [PMID: 28744290 PMCID: PMC5504655 DOI: 10.3389/fpls.2017.01181] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 06/20/2017] [Indexed: 05/18/2023]
Abstract
Rising temperatures during growing seasons coupled with altered precipitation rates presents a challenging task of improving crop productivity for overcoming such altered weather patterns and cater to a growing population. Light is a critical environmental factor that exerts a powerful influence on plant growth and development ranging from seed germination to flowering and fruiting. Higher plants utilize a suite of complex photoreceptor proteins to perceive surrounding red/far-red (phytochromes), blue/UV-A (cryptochromes, phototropins, ZTL/FKF1/LKP2), and UV-B light (UVR8). While genomic studies have also shown that light induces extensive reprogramming of gene expression patterns in plants, molecular genetic studies have shown that manipulation of one or more photoreceptors can result in modification of agronomically beneficial traits. Such information can assist researchers to engineer photoreceptors via genome editing technologies to alter expression or even sensitivity thresholds of native photoreceptors for targeting aspects of plant growth that can confer superior agronomic value to the engineered crops. Here we summarize the agronomically important plant growth processes influenced by photoreceptors in crop species, alongwith the functional interactions between different photoreceptors and phytohormones in regulating these responses. We also discuss the potential utility of synthetic biology approaches in photobiology for improving agronomically beneficial traits of crop plants by engineering designer photoreceptors.
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37
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Dong B, Deng Y, Wang H, Gao R, Stephen GK, Chen S, Jiang J, Chen F. Gibberellic Acid Signaling Is Required to Induce Flowering of Chrysanthemums Grown under Both Short and Long Days. Int J Mol Sci 2017; 18:ijms18061259. [PMID: 28604637 PMCID: PMC5486081 DOI: 10.3390/ijms18061259] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 06/01/2017] [Accepted: 06/06/2017] [Indexed: 12/22/2022] Open
Abstract
Flower bud formation and flowering in chrysanthemums occur under short day conditions (SD), but the molecular basis for the switch to reproductive growth is less well understood than in model plants. Here, a spontaneous mutant able to flower under long days is described. In an attempt to reveal the pathway(s) involved in the formation of flower buds under contrasting daylengths, transcriptome sequencing was carried out in plants grown both under SD and long day conditions (LD). A number of differentially transcribed genes involved in the various known flowering pathways were identified. Both circadian clock genes and Chrysanthemum FLOWERING LOCUS T Like3 (CmFTL3) were up-regulated under SD, thereby inducing floral bud formation and flowering. The gibberellin (GA) signaling pathway-related genes Gibberellin 20-oxidase (GA20ox) and Gibberellin receptor (GID1) were up-regulated in the mutant under LD, while the catabolic genes Gibberellin 2-oxidase (GA2ox) and GA-INSENSITIVE (GAI) were down-regulated, thereby inducing the transcription of SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 (SOC1) and LEAFY (LFY). The GA content of the leaf was higher in the mutant than in the wild type (WT) under LD and SD, and the mutant has more branching than WT plants under LD or SD. When treated with GA, the mutant flowered earlier under both SD and LD relative to WT, but there was no detectable phenotype difference between the two lines. The indication was that the photoperiod pathway majorly regulates flower bud formation and flowering time in chrysanthemums under SD. The GA signaling pathway only plays a subsidiary role for flowering. However, the GA signaling pathway predominated for flowering under LD.
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Affiliation(s)
- Bin Dong
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing 210095, China.
| | - Ye Deng
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing 210095, China.
| | - Haibin Wang
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing 210095, China.
| | - Ri Gao
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing 210095, China.
| | - Githeng'u K Stephen
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing 210095, China.
| | - Sumei Chen
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing 210095, China.
| | - Jiafu Jiang
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing 210095, China.
| | - Fadi Chen
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing 210095, China.
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Li Y, Wang H, Li X, Liang G, Yu D. Two DELLA-interacting proteins bHLH48 and bHLH60 regulate flowering under long-day conditions in Arabidopsis thaliana. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:2757-2767. [PMID: 28591805 PMCID: PMC5853475 DOI: 10.1093/jxb/erx143] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 04/13/2017] [Indexed: 05/07/2023]
Abstract
Gibberellin (GA) regulates many developmental transitions in the plant life cycle. Although great progress has been made, the GA signaling pathways have not been fully elucidated. Identifying and characterizing new targets of DELLA proteins is an effective approach to reveal the complicated GA signaling networks. In this study, two novel DELLA-interacting transcription factors, bHLH48 and bHLH60, were identified. Their overexpression caused plants to flower early under long-day conditions, whereas their functional repression resulted in the opposite result. The constitutive expression of bHLH48 and bHLH60 upregulated the transcription of the FLOWERING LOCUS T (FT) gene. Chromatin immunoprecipitation experiments confirmed that bHLH48 bound to the promoter of FT and that GA promoted the DNA-binding activity of bHLH48. Genetic analyses indicated that the early flowering phenotype of plants overexpressing bHLH48 and bHLH60 depended on FT and that the overexpression of bHLH48 and bHLH60 could rescue the late-flowering phenotypes of RGL1 overexpressing plants. Transient expression assays suggested that RGL1 inhibited the transcription activation ability of bHLH48 and bHLH60. Taken together, this study confirmed that bHLH48 and bHLH60 positively regulate GA-mediated flowering.
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Affiliation(s)
- Yang Li
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Kunming, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Houping Wang
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Kunming, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xiaoli Li
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Kunming, Yunnan, China
| | - Gang Liang
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Kunming, Yunnan, China
- Correspondence: ;
| | - Diqiu Yu
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Kunming, Yunnan, China
- Correspondence: ;
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Conti L. Hormonal control of the floral transition: Can one catch them all? Dev Biol 2017; 430:288-301. [PMID: 28351648 DOI: 10.1016/j.ydbio.2017.03.024] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 03/21/2017] [Accepted: 03/24/2017] [Indexed: 01/05/2023]
Abstract
The transition to flowering marks a key adaptive developmental switch in plants which impacts on their survival and fitness. Different signaling pathways control the floral transition, conveying both endogenous and environmental cues. These cues are often relayed and/or modulated by different hormones, which might confer additional developmental flexibility to the floral process in the face of varying conditions. Among the different hormonal pathways, the phytohormone gibberellic acid (GA) plays a dominant role. GA is connected with the other floral pathways through the GA-regulated DELLA proteins, acting as versatile interacting modules for different signaling proteins. In this review, I will highlight the role of DELLAs as spatial and temporal modulators of different consolidated floral pathways. Next, building on recent data, I will provide an update on some emerging themes connecting other hormone signaling cascades to flowering time control. I will finally provide examples for some established as well as potential cross-regulatory mechanisms between hormonal pathways mediated by the DELLA proteins.
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Affiliation(s)
- Lucio Conti
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Celoria 26, 20133 Milano, Italy.
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40
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Espinosa MEÁ, Moreira RO, Lima AA, Ságio SA, Barreto HG, Luiz SLP, Abreu CEA, Yanes-Paz E, Ruíz YC, González-Olmedo JL, Chalfun-Júnior A. Early histological, hormonal, and molecular changes during pineapple (Ananas comosus (L.) Merrill) artificial flowering induction. JOURNAL OF PLANT PHYSIOLOGY 2017; 209:11-19. [PMID: 27988471 DOI: 10.1016/j.jplph.2016.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 11/17/2016] [Accepted: 11/22/2016] [Indexed: 06/06/2023]
Abstract
Natural flowering can cause serious scheduling problems in the pineapple (Ananas comosus) industry and increase harvest costs. Pineapple flowering is thought to be triggered by increased ethylene levels and artificial forcing of pineapple flowering is a common practice to promote flowering synchronisation. However, little is known about the early hormonal and molecular changes of pineapple flowering induction and development. Here, we aimed to analyse the molecular, hormonal, and histological changes during artificial pineapple flowering by Ethrel®48 treatment. Histological analyses of the shoot apical meristem, leaf gibberellic acid (GA3), and ethylene quantification were carried out during the first 72h after Ethrel®48 treatment. Expression profiles from ethylene biosynthesis (AcACS2 and AcACO1), gibberellin metabolism (AcGA2-ox1 and AcDELLA1), and flower development (FT-like gene (AcFT), LFY-like gene (AcLFY), and a PISTILLATA-like gene (AcPI)) genes were analysed during the first 24h after Ethrel®48 treatment. Differentiation processes of the shoot apical meristem into flower buds were already present in the first 72h after Ethrel®48 treatment. Ethrel®48 lead to a reduction in GA3 levels, probably triggered by elevated ethylene levels and the positive regulation AcGA2-ox1. AcLFY activation upon Ethrel®48 may also have contributed to the reduction of GA3 levels and, along with the up-regulation of AcPI, are probably associated with the flower induction activation. AcFT and AcDELLA1 do not seem to be regulated by GA3 and ethylene. Decreased GA3 and increased ethylene levels suggest an accumulation of AcDELLA1, which may display an important role in pineapple flowering induction. Thus, this study shows that molecular, hormonal, and histological changes are present right after Ethrel®48 treatment, providing new insights into how pineapple flowering occurs under natural conditions.
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Affiliation(s)
| | - Rafael Oliveira Moreira
- Plant Molecular Physiology Laboratory, Biology Department, Federal University of Lavras (UFLA), Lavras, Minas Gerais, Brazil
| | - André Almeida Lima
- Plant Molecular Physiology Laboratory, Biology Department, Federal University of Lavras (UFLA), Lavras, Minas Gerais, Brazil
| | | | - Horllys Gomes Barreto
- Federal University of Tocantins (UFT), Campus Universitário de Gurupi, Gurupi, Tocantins, Brazil
| | | | | | | | | | | | - Antonio Chalfun-Júnior
- Plant Molecular Physiology Laboratory, Biology Department, Federal University of Lavras (UFLA), Lavras, Minas Gerais, Brazil.
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41
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Yang C, Li L. Hormonal Regulation in Shade Avoidance. FRONTIERS IN PLANT SCIENCE 2017; 8:1527. [PMID: 28928761 PMCID: PMC5591575 DOI: 10.3389/fpls.2017.01527] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 08/21/2017] [Indexed: 05/10/2023]
Abstract
At high vegetation density, shade-intolerant plants sense a reduction in the red (660 nm) to far-red (730 nm) light ratio (R/FR) in addition to a general reduction in light intensity. These light signals trigger a spectrum of morphological changes manifested by growth of stem-like tissue (hypocotyl, petiole, etc.) instead of harvestable organs (leaves, fruits, seeds, etc.)-namely, shade avoidance syndrome (SAS). Common phenotypical changes related to SAS are changes in leaf hyponasty, an increase in hypocotyl and internode elongation and extended petioles. Prolonged shade exposure leads to early flowering, less branching, increased susceptibility to insect herbivory, and decreased seed yield. Thus, shade avoidance significantly impacts on agronomic traits. Many genetic and molecular studies have revealed that phytochromes, cryptochromes and UVR8 (UV-B photoreceptor protein) monitor the changes in light intensity under shade and regulate the stability or activity of phytochrome-interacting factors (PIFs). PIF-governed modulation of the expression of auxin biosynthesis, transporter and signaling genes is the major driver for shade-induced hypocotyl elongation. Besides auxin, gibberellins, brassinosteroids, and ethylene are also required for shade-induced hypocotyl or petiole elongation growth. In leaves, accumulated auxin stimulates cytokinin oxidase expression to break down cytokinins and inhibit leaf growth. In the young buds, shade light promotes the accumulation of abscisic acid to repress branching. Shade light also represses jasmonate- and salicylic acid-induced defense responses to balance resource allocation between growth and defense. Here we will summarize recent findings relating to such hormonal regulation in SAS in Arabidopsis thaliana, Brassica rapa, and certain crops.
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Fan S, Zhang D, Lei C, Chen H, Xing L, Ma J, Zhao C, Han M. Proteome Analyses Using iTRAQ Labeling Reveal Critical Mechanisms in Alternate Bearing Malus prunifolia. J Proteome Res 2016; 15:3602-3616. [DOI: 10.1021/acs.jproteome.6b00357] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sheng Fan
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Dong Zhang
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chao Lei
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hongfei Chen
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Libo Xing
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Juanjuan Ma
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Caiping Zhao
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Mingyu Han
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
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de Wit M, Galvão VC, Fankhauser C. Light-Mediated Hormonal Regulation of Plant Growth and Development. ANNUAL REVIEW OF PLANT BIOLOGY 2016; 67:513-37. [PMID: 26905653 DOI: 10.1146/annurev-arplant-043015-112252] [Citation(s) in RCA: 213] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Light is crucial for plant life, and perception of the light environment dictates plant growth, morphology, and developmental changes. Such adjustments in growth and development in response to light conditions are often established through changes in hormone levels and signaling. This review discusses examples of light-regulated processes throughout a plant's life cycle for which it is known how light signals lead to hormonal regulation. Light acts as an important developmental switch in germination, photomorphogenesis, and transition to flowering, and light cues are essential to ensure light capture through architectural changes during phototropism and the shade avoidance response. In describing well-established links between light perception and hormonal changes, we aim to give insight into the mechanisms that enable plants to thrive in variable light environments.
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Affiliation(s)
- Mieke de Wit
- Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, CH-1015 Lausanne, Switzerland; , ,
| | - Vinicius Costa Galvão
- Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, CH-1015 Lausanne, Switzerland; , ,
| | - Christian Fankhauser
- Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, CH-1015 Lausanne, Switzerland; , ,
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Xing LB, Zhang D, Li YM, Shen YW, Zhao CP, Ma JJ, An N, Han MY. Transcription Profiles Reveal Sugar and Hormone Signaling Pathways Mediating Flower Induction in Apple (Malus domestica Borkh.). PLANT & CELL PHYSIOLOGY 2015; 56:2052-68. [PMID: 26412779 DOI: 10.1093/pcp/pcv124] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 08/14/2015] [Indexed: 05/08/2023]
Abstract
Flower induction in apple (Malus domestica Borkh.) is regulated by complex gene networks that involve multiple signal pathways to ensure flower bud formation in the next year, but the molecular determinants of apple flower induction are still unknown. In this research, transcriptomic profiles from differentiating buds allowed us to identify genes potentially involved in signaling pathways that mediate the regulatory mechanisms of flower induction. A hypothetical model for this regulatory mechanism was obtained by analysis of the available transcriptomic data, suggesting that sugar-, hormone- and flowering-related genes, as well as those involved in cell-cycle induction, participated in the apple flower induction process. Sugar levels and metabolism-related gene expression profiles revealed that sucrose is the initiation signal in flower induction. Complex hormone regulatory networks involved in cytokinin (CK), abscisic acid (ABA) and gibberellic acid pathways also induce apple flower formation. CK plays a key role in the regulation of cell formation and differentiation, and in affecting flowering-related gene expression levels during these processes. Meanwhile, ABA levels and ABA-related gene expression levels gradually increased, as did those of sugar metabolism-related genes, in developing buds, indicating that ABA signals regulate apple flower induction by participating in the sugar-mediated flowering pathway. Furthermore, changes in sugar and starch deposition levels in buds can be affected by ABA content and the expression of the genes involved in the ABA signaling pathway. Thus, multiple pathways, which are mainly mediated by crosstalk between sugar and hormone signals, regulate the molecular network involved in bud growth and flower induction in apple trees.
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Affiliation(s)
- Li-Bo Xing
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Dong Zhang
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - You-Mei Li
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ya-Wen Shen
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Cai-Ping Zhao
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Juan-Juan Ma
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Na An
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ming-Yu Han
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
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Rodríguez-Nogales A, Algieri F, Vezza T, Garrido-Mesa N, Olivares M, Comalada M, Riccardi C, Utrilla MP, Rodríguez-Cabezas ME, Galvez J. The viability of Lactobacillus fermentum CECT5716 is not essential to exert intestinal anti-inflammatory properties. Food Funct 2015; 6:1176-84. [DOI: 10.1039/c4fo00938j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The viability ofL. fermentumCECT5716 did not affect its immune-modulatory and anti-inflammatory properties.
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Affiliation(s)
- Alba Rodríguez-Nogales
- CIBER-EHD
- Department of Pharmacology
- ibs.GRANADA
- Center for Biomedical Research (CIBM)
- University of Granada
| | - Francesca Algieri
- CIBER-EHD
- Department of Pharmacology
- ibs.GRANADA
- Center for Biomedical Research (CIBM)
- University of Granada
| | - Teresa Vezza
- CIBER-EHD
- Department of Pharmacology
- ibs.GRANADA
- Center for Biomedical Research (CIBM)
- University of Granada
| | - Natividad Garrido-Mesa
- CIBER-EHD
- Department of Pharmacology
- ibs.GRANADA
- Center for Biomedical Research (CIBM)
- University of Granada
| | | | | | - Carlo Riccardi
- Department of Clinical and Experimental Medicine
- University of Perugia
- Italy
| | - Ma Pilar Utrilla
- CIBER-EHD
- Department of Pharmacology
- ibs.GRANADA
- Center for Biomedical Research (CIBM)
- University of Granada
| | - Ma Elena Rodríguez-Cabezas
- CIBER-EHD
- Department of Pharmacology
- ibs.GRANADA
- Center for Biomedical Research (CIBM)
- University of Granada
| | - Julio Galvez
- CIBER-EHD
- Department of Pharmacology
- ibs.GRANADA
- Center for Biomedical Research (CIBM)
- University of Granada
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Liew LC, Singh MB, Bhalla PL. Unique and conserved features of floral evocation in legumes. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2014; 56:714-728. [PMID: 24930396 DOI: 10.1111/jipb.12187] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 02/19/2014] [Indexed: 06/03/2023]
Abstract
Legumes, with their unique ability to fix atmospheric nitrogen, play a vital role in ensuring future food security and mitigating the effects of climate change because they use less fossil energy and produce less greenhouse gases compared with N-fertilized systems. Grain legumes are second only to cereal crops as a source of human and animal food, and they contribute approximately one third of the protein consumed by the human population. The productivity of seed crops, such as grain legumes, is dependent on flowering. Despite the genetic variation and importance of flowering in legume production, studies of the molecular pathways that control flowering in legumes are limited. Recent advances in genomics have revealed that legume flowering pathways are divergent from those of such model species as Arabidopsis thaliana. Here, we discuss the current understanding of flowering time regulation in legumes and highlight the unique and conserved features of floral evocation in legumes.
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Affiliation(s)
- Lim Chee Liew
- Plant Molecular Biology and Biotechnology Laboratory, Melbourne School of Land and Environment, University of Melbourne, Parkville, Victoria, 3010, Australia
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Choi D, Choi J, Kang B, Lee S, Cho YH, Hwang I, Hwang D. iNID: an analytical framework for identifying network models for interplays among developmental signaling in Arabidopsis. MOLECULAR PLANT 2014; 7:792-813. [PMID: 24380880 DOI: 10.1093/mp/sst173] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Integration of internal and external cues into developmental programs is indispensable for growth and development of plants, which involve complex interplays among signaling pathways activated by the internal and external factors (IEFs). However, decoding these complex interplays is still challenging. Here, we present a web-based platform that identifies key regulators and Network models delineating Interplays among Developmental signaling (iNID) in Arabidopsis. iNID provides a comprehensive resource of (1) transcriptomes previously collected under the conditions treated with a broad spectrum of IEFs and (2) protein and genetic interactome data in Arabidopsis. In addition, iNID provides an array of tools for identifying key regulators and network models related to interplays among IEFs using transcriptome and interactome data. To demonstrate the utility of iNID, we investigated the interplays of (1) phytohormones and light and (2) phytohormones and biotic stresses. The results revealed 34 potential regulators of the interplays, some of which have not been reported in association with the interplays, and also network models that delineate the involvement of the 34 regulators in the interplays, providing novel insights into the interplays collectively defined by phytohormones, light, and biotic stresses. We then experimentally verified that BME3 and TEM1, among the selected regulators, are involved in the auxin-brassinosteroid (BR)-blue light interplay. Therefore, iNID serves as a useful tool to provide a basis for understanding interplays among IEFs.
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Affiliation(s)
- Daeseok Choi
- School of Interdisciplinary Bioscience and Bioengineering, POSTECH, 790-784, Pohang, Republic of Korea
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Boden SA, Weiss D, Ross JJ, Davies NW, Trevaskis B, Chandler PM, Swain SM. EARLY FLOWERING3 Regulates Flowering in Spring Barley by Mediating Gibberellin Production and FLOWERING LOCUS T Expression. THE PLANT CELL 2014; 26:1557-1569. [PMID: 24781117 PMCID: PMC4036571 DOI: 10.1105/tpc.114.123794] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
EARLY FLOWERING3 (ELF3) is a circadian clock gene that contributes to photoperiod-dependent flowering in plants, with loss-of-function mutants in barley (Hordeum vulgare), legumes, and Arabidopsis thaliana flowering early under noninductive short-day (SD) photoperiods. The barley elf3 mutant displays increased expression of FLOWERING LOCUS T1 (FT1); however, it remains unclear whether this is the only factor responsible for the early flowering phenotype. We show that the early flowering and vegetative growth phenotypes of the barley elf3 mutant are strongly dependent on gibberellin (GA) biosynthesis. Expression of the central GA biosynthesis gene, GA20oxidase2, and production of the bioactive GA, GA1, were significantly increased in elf3 leaves under SDs, relative to the wild type. Inhibition of GA biosynthesis suppressed the early flowering of elf3 under SDs independently of FT1 and was associated with altered expression of floral identity genes at the developing apex. GA is also required for normal flowering of spring barley under inductive photoperiods, with chemical and genetic attenuation of the GA biosynthesis and signaling pathways suppressing inflorescence development under long-day conditions. These findings illustrate that GA is an important floral promoting signal in barley and that ELF3 suppresses flowering under noninductive photoperiods by blocking GA production and FT1 expression.
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Affiliation(s)
| | - David Weiss
- Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - John J Ross
- School of Biological Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Noel W Davies
- School of Biological Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia
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Chao Y, Zhang T, Yang Q, Kang J, Sun Y, Gruber MY, Qin Z. Expression of the alfalfa CCCH-type zinc finger protein gene MsZFN delays flowering time in transgenic Arabidopsis thaliana. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2014; 215-216:92-99. [PMID: 24388519 DOI: 10.1016/j.plantsci.2013.10.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 10/16/2013] [Accepted: 10/21/2013] [Indexed: 06/03/2023]
Abstract
Zinc finger proteins comprise a large family and function in various developmental processes. CCCH type zinc finger protein is one kind of zinc finger protein, which function is little known. MsZFN gene encoding a CCCH type zinc finger protein was first discovered by its elevated transcript level in a salt-induced alfalfa SSH cDNA library. The previous experiment had showed that MsZFN protein was localized to the nucleus and little is known about the function of MsZFN protein and its homologous proteins in other plants including model plant, Arabidopsis thaliana. In the current study, we found that MsZFN transcript levels increased in alfalfa under continuous dark conditions and that expression was strongest in leaves and weakest in unopened flowers under light/dark conditions. Expression of MsZFN in transgenic Arabidopsis plants resulted in late flowering phenotypes under long day conditions. Yeast two-hybrid and bimolecular fluorescence complementation assays indicated that MsZFN protein can interact with itself. Transcript analyses of floral regulatory genes in MsZFN(+) transgenic Arabidopsis showed enhanced expression of the flowering repressor FLOWERING LOCUS C and decreased expression of three key flowering time genes, FLOWERING LOCUS T, SUPPRESSOR OF OVEREXPRESSION OF CONSTANS and GIGANTEA. These results suggest that MsZFN primarily controls flowering time by repressing flowering genes expression under long day conditions.
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Affiliation(s)
- Yuehui Chao
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
| | - Tiejun Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
| | - Qingchuan Yang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China.
| | - Junmei Kang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
| | - Yan Sun
- College of Animal Science and Technology, China Agriculture University, Beijing 100193, People's Republic of China
| | - Margaret Yvonne Gruber
- Saskatoon Research Centre, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, Saskatchewan S7N0X2, Canada
| | - Zhihui Qin
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China; Bioengineering College of Chongqing University, Chongqing 400030, People's Republic of China
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50
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Khan MRG, Ai XY, Zhang JZ. Genetic regulation of flowering time in annual and perennial plants. WILEY INTERDISCIPLINARY REVIEWS-RNA 2013; 5:347-59. [DOI: 10.1002/wrna.1215] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 09/12/2013] [Accepted: 09/13/2013] [Indexed: 01/03/2023]
Affiliation(s)
- Muhammad Rehman Gul Khan
- Key Laboratory of Horticultural Plant Biology, Ministry of Education; College of Horticulture and Forestry Science, Huazhong Agricultural University; Wuhan China
| | - Xiao-Yan Ai
- Key Laboratory of Horticultural Plant Biology, Ministry of Education; College of Horticulture and Forestry Science, Huazhong Agricultural University; Wuhan China
| | - Jin-Zhi Zhang
- Key Laboratory of Horticultural Plant Biology, Ministry of Education; College of Horticulture and Forestry Science, Huazhong Agricultural University; Wuhan China
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