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Rong M, Gao SX, Wen D, Xu YH, Wei JH. The LOB domain protein, a novel transcription factor with multiple functions: A review. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 214:108922. [PMID: 39038384 DOI: 10.1016/j.plaphy.2024.108922] [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: 05/05/2024] [Revised: 07/03/2024] [Accepted: 07/06/2024] [Indexed: 07/24/2024]
Abstract
The LATERAL ORGAN BOUNDARIES DOMAIN (LBD) protein, named for its LATERAL ORGAN BOUNDARIES (LOB) domain, is a member of a class of specific transcription factors commonly found in plants and is absent from all other groups of organisms. LBD TFs have been systematically identified in about 35 plant species and are involved in regulating various aspects of plant growth and development. However, research on the signaling network and regulatory functions of LBD TFs is insufficient, and only a few members have been studied. Moreover, a comprehensive review of these existing studies is lacking. In this review, the structure, regulatory mechanism and function of LBD TFs in recent years were reviewed in order to better understand the role of LBD TFs in plant growth and development, and to provide a new perspective for the follow-up study of LBD TFs.
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Affiliation(s)
- Mei Rong
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Shi-Xi Gao
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Dong Wen
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Yan-Hong Xu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China.
| | - Jian-He Wei
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China; Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine & Key Laboratory of State Administration of Traditional Chinese Medicine for Agarwood Sustainable Utilization, Hainan Branch of the Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Haikou, 570311, China.
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2
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Dong L, Manghwar H. Genome-wide expression analysis of LBD genes in tomato ( Solanum lycopersicum L.) under different light conditions. PLANT SIGNALING & BEHAVIOR 2023; 18:2290414. [PMID: 38059488 PMCID: PMC10732681 DOI: 10.1080/15592324.2023.2290414] [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: 11/09/2023] [Accepted: 11/28/2023] [Indexed: 12/08/2023]
Abstract
Lateral organ boundaries (LOB) domain (LBD) genes, a gene family that encodes the transcription factors (TFs) of plants, plays crucial functions in the development and growth of plants. Currently, genome-wide studies of the LBD family are still limited to tomato (Solanum lycopersicum L.), which is considered an important economic crop. In this study, we performed a genome-wide analysis of LBD in tomato. In total, 56 LBDs were found in the tomato genome. Protein alignment and phylogenetic classification showed that LBDs were conserved with other species. Since light emitting diodes (LEDs) light have promising applications for tomato growth. To better understand the potential function of LBDs in response to LED light in tomato, we conducted a genome-wide expression analysis of LBD genes under different light conditions. As expected, different LED lights affected the tomato growth (e.g. hypocotyl length). RNA-seq data showed that eight LBDs in tomato seedlings were differentially expressed under different light treatments, including white, blue, red, and far-red light, compared to the dark-grown condition. It indicates that these LBDs might regulate plant development in different LED light conditions. Interestingly, two LBD genes (SlLBD1 and SlLBD2) were found to be differentially expressed in four distinct lights, which might be involved in regulating the plant architecture via a complicated TF network, which can be taken into consideration in further investigation.
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Affiliation(s)
- Limei Dong
- Guangdong Eco-engineering Polytechnic, Guangzhou, Guangdong, P.R. China
| | - Hakim Manghwar
- Lushan Botanical Garden, Jiangxi Province and Chinese Academy of Sciences, Jiujiang, Jiangxi, P.R. China
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3
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Mao X, Zheng X, Chen W, Li C. Characterization and Gene Mapping of an Open-Glume Oryza sativa L. Mutant. Int J Mol Sci 2023; 24:12702. [PMID: 37628883 PMCID: PMC10454609 DOI: 10.3390/ijms241612702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/04/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
Floral organ development determines agricultural productivity by affecting seed development, seed quality, and final yield. In this study, we described the novel ogl mutant in rice (Oryza sativa L.), which is characterized by an open-glume phenotype, increased pistil number, reduced stamen number, decreased seed setting rate, and smaller rice grains. Genetic analysis showed that the open-glume phenotype might be controlled by a recessive qualitative trait locus. Employing bulked segregant analysis (BSA), one candidate region was identified on rice chromosome 1. The glume opening phenotype cosegregated with SNP (Chr1:1522703), which was located at the start codon of one transcript of OsJAG, resulting in partial loss of OsJAG function. cDNA analysis revealed that OsJAG encodes two transcript variants. Compared to normal plants, the expression of OsJAG.1 was upregulated in open-glume plants. When investigating the glume phenotype, we found that the expression of genes related to floral development changed greatly in open-glume plants. Taken together, this work increases our understanding of the developmental role of OsJAG in rice floral development.
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Affiliation(s)
- Xingxue Mao
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, China
| | - Xiaoyu Zheng
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, China
| | - Wenfeng Chen
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, China
| | - Chen Li
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, China
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4
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Wu M, He W, Wang L, Zhang X, Wang K, Xiang Y. PheLBD29, an LBD transcription factor from Moso bamboo, causes leaf curvature and enhances tolerance to drought stress in transgenic Arabidopsis. JOURNAL OF PLANT PHYSIOLOGY 2023; 280:153865. [PMID: 36459885 DOI: 10.1016/j.jplph.2022.153865] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 11/09/2022] [Accepted: 11/09/2022] [Indexed: 06/17/2023]
Abstract
The lateral organ boundaries domain (LBD), a unique family of transcription factors in higher plants, plays a key role in plant growth and development, and stress response. Here, we report on the novel lateral organ boundaries domain (LBD) gene PheLBD29, a nuclear localization protein that can bind the conserved GCCCCG sequence, as determined by electrophoretic mobility shift assay (EMSA). PheLBD29 was highly expressed in blade leaf and significantly induced by polyethylene glycol (PEG). Overexpression of PheLBD29 leads to small and abaxially rolled leaves in Arabidopsis, and anatomically, 35S:PheLBD29 Arabidopsis leaves showed transformation of adaxial cells into abaxial cells. Moreover, overexpression of PheLBD29 in Arabidopsis increased plant tolerance to drought stress, by accumulation of more soluble sugars, less malondialdehyde (MDA), and had lower REL levels under drought stress. Transient expression assay revealed PheLBD29 directly bound to the promoter region of RAB18. In addition, 35S:PheLBD29 Arabidopsis showed higher sensitivity to abscisic acid (ABA) than the wild type. Therefore, we conclude that PheLBD29 may participate in the ABA-dependent signaling pathway to improve drought tolerance. Our study provides new evidence for a Moso bamboo LBD protein regulatory module in leaf curvature and drought resistance.
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Affiliation(s)
- Min Wu
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Wei He
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Linna Wang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Xiaoyue Zhang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Kang Wang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Yan Xiang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China.
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Du W, Lu Y, Li Q, Luo S, Shen S, Li N, Chen X. TIR1/AFB proteins: Active players in abiotic and biotic stress signaling. FRONTIERS IN PLANT SCIENCE 2022; 13:1083409. [PMID: 36523629 PMCID: PMC9745157 DOI: 10.3389/fpls.2022.1083409] [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: 10/29/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
The TIR1/AFB family of proteins is a group of functionally diverse auxin receptors that are only found in plants. TIR1/AFB family members are characterized by a conserved N-terminal F-box domain followed by 18 leucine-rich repeats. In the past few decades, extensive research has been conducted on the role of these proteins in regulating plant development, metabolism, and responses to abiotic and biotic stress. In this review, we focus on TIR1/AFB proteins that play crucial roles in plant responses to diverse abiotic and biotic stress. We highlight studies that have shed light on the mechanisms by which TIR1/AFB proteins are regulated at the transcriptional and post-transcriptional as well as the downstream in abiotic or biotic stress pathways regulated by the TIR1/AFB family.
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Affiliation(s)
- Wenchao Du
- Key Laboratory for Vegetable Germplasm Enhancement and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding, China
| | - Yang Lu
- Hebei University Characteristic sericulture Application Technology Research and Development Center, Institute of Sericulture, Chengde Medical University, Chengde, China
| | - Qiang Li
- Key Laboratory for Vegetable Germplasm Enhancement and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding, China
| | - Shuangxia Luo
- Key Laboratory for Vegetable Germplasm Enhancement and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding, China
| | - Shuxing Shen
- Key Laboratory for Vegetable Germplasm Enhancement and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding, China
| | - Na Li
- Key Laboratory for Vegetable Germplasm Enhancement and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding, China
| | - Xueping Chen
- Key Laboratory for Vegetable Germplasm Enhancement and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding, China
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Li L, Verstraeten I, Roosjen M, Takahashi K, Rodriguez L, Merrin J, Chen J, Shabala L, Smet W, Ren H, Vanneste S, Shabala S, De Rybel B, Weijers D, Kinoshita T, Gray WM, Friml J. Cell surface and intracellular auxin signalling for H + fluxes in root growth. Nature 2021; 599:273-277. [PMID: 34707283 PMCID: PMC7612300 DOI: 10.1038/s41586-021-04037-6] [Citation(s) in RCA: 104] [Impact Index Per Article: 34.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 09/17/2021] [Indexed: 11/09/2022]
Abstract
Growth regulation tailors development in plants to their environment. A prominent example of this is the response to gravity, in which shoots bend up and roots bend down1. This paradox is based on opposite effects of the phytohormone auxin, which promotes cell expansion in shoots while inhibiting it in roots via a yet unknown cellular mechanism2. Here, by combining microfluidics, live imaging, genetic engineering and phosphoproteomics in Arabidopsis thaliana, we advance understanding of how auxin inhibits root growth. We show that auxin activates two distinct, antagonistically acting signalling pathways that converge on rapid regulation of apoplastic pH, a causative determinant of growth. Cell surface-based TRANSMEMBRANE KINASE1 (TMK1) interacts with and mediates phosphorylation and activation of plasma membrane H+-ATPases for apoplast acidification, while intracellular canonical auxin signalling promotes net cellular H+ influx, causing apoplast alkalinization. Simultaneous activation of these two counteracting mechanisms poises roots for rapid, fine-tuned growth modulation in navigating complex soil environments.
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Affiliation(s)
- Lanxin Li
- Institute of Science and Technology (IST) Austria, Klosterneuburg, Austria
| | - Inge Verstraeten
- Institute of Science and Technology (IST) Austria, Klosterneuburg, Austria
| | - Mark Roosjen
- Laboratory of Biochemistry, Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen, the Netherlands
| | - Koji Takahashi
- Institute of Transformative Bio-Molecules, Division of Biological Science, Nagoya University Chikusa, Nagoya, Japan
- Graduate School of Science, Nagoya University Chikusa, Nagoya, Japan
| | - Lesia Rodriguez
- Institute of Science and Technology (IST) Austria, Klosterneuburg, Austria
| | - Jack Merrin
- Institute of Science and Technology (IST) Austria, Klosterneuburg, Austria
| | - Jian Chen
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- VIB Center for Plant Systems Biology, Ghent, Belgium
| | - Lana Shabala
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania, Australia
| | - Wouter Smet
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- VIB Center for Plant Systems Biology, Ghent, Belgium
| | - Hong Ren
- Department of Plant & Microbial Biology, University of Minnesota, St. Paul, MN, USA
| | - Steffen Vanneste
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Laboratory of Plant Growth Analysis, Ghent University Global Campus, Incheon, Republic of Korea
- Department of Plants and Crops, HortiCell, Ghent University, Ghent, Belgium
| | - Sergey Shabala
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania, Australia
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
| | - Bert De Rybel
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- VIB Center for Plant Systems Biology, Ghent, Belgium
| | - Dolf Weijers
- Laboratory of Biochemistry, Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen, the Netherlands
| | - Toshinori Kinoshita
- Institute of Transformative Bio-Molecules, Division of Biological Science, Nagoya University Chikusa, Nagoya, Japan
- Graduate School of Science, Nagoya University Chikusa, Nagoya, Japan
| | - William M Gray
- Department of Plant & Microbial Biology, University of Minnesota, St. Paul, MN, USA
| | - Jiří Friml
- Institute of Science and Technology (IST) Austria, Klosterneuburg, Austria.
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Ali S, Khan N, Xie L. Molecular and Hormonal Regulation of Leaf Morphogenesis in Arabidopsis. Int J Mol Sci 2020; 21:ijms21145132. [PMID: 32698541 PMCID: PMC7404056 DOI: 10.3390/ijms21145132] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/14/2020] [Accepted: 07/15/2020] [Indexed: 12/28/2022] Open
Abstract
Shoot apical meristems (SAM) are tissues that function as a site of continuous organogenesis, which indicates that a small pool of pluripotent stem cells replenishes into lateral organs. The coordination of intercellular and intracellular networks is essential for maintaining SAM structure and size and also leads to patterning and formation of lateral organs. Leaves initiate from the flanks of SAM and then develop into a flattened structure with variable sizes and forms. This process is mainly regulated by the transcriptional regulators and mechanical properties that modulate leaf development. Leaf initiation along with proper orientation is necessary for photosynthesis and thus vital for plant survival. Leaf development is controlled by different components such as hormones, transcription factors, miRNAs, small peptides, and epigenetic marks. Moreover, the adaxial/abaxial cell fate, lamina growth, and shape of margins are determined by certain regulatory mechanisms. The over-expression and repression of various factors responsible for leaf initiation, development, and shape have been previously studied in several mutants. However, in this review, we collectively discuss how these factors modulate leaf development in the context of leaf initiation, polarity establishment, leaf flattening and shape.
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Affiliation(s)
- Shahid Ali
- College of Life Sciences, Northeast Forestry University, Harbin 150040, China
- Correspondence: (S.A.); (L.X.)
| | - Naeem Khan
- Department of Agronomy, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA;
| | - Linan Xie
- College of Life Sciences, Northeast Forestry University, Harbin 150040, China
- Key Laboratory of Saline-Alkali Vegetative Ecology Restoration, Ministry of Education, College of Life Science, Northeast Forestry University, Harbin 150040, China
- Correspondence: (S.A.); (L.X.)
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Zhang Y, Li Z, Ma B, Hou Q, Wan X. Phylogeny and Functions of LOB Domain Proteins in Plants. Int J Mol Sci 2020; 21:ijms21072278. [PMID: 32224847 PMCID: PMC7178066 DOI: 10.3390/ijms21072278] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/22/2020] [Accepted: 03/23/2020] [Indexed: 02/07/2023] Open
Abstract
Lateral organ boundaries (LOB) domain (LBD) genes, a gene family encoding plant-specific transcription factors, play important roles in plant growth and development. At present, though there have been a number of genome-wide analyses on LBD gene families and functional studies on individual LBD proteins, the diverse functions of LBD family members still confuse researchers and an effective strategy is required to summarize their functional diversity. To further integrate and improve our understanding of the phylogenetic classification, functional characteristics and regulatory mechanisms of LBD proteins, we review and discuss the functional characteristics of LBD proteins according to their classifications under a phylogenetic framework. It is proved that this strategy is effective in the anatomy of diverse functions of LBD family members. Additionally, by phylogenetic analysis, one monocot-specific and one eudicot-specific subclade of LBD proteins were found and their biological significance in monocot and eudicot development were also discussed separately. The review will help us better understand the functional diversity of LBD proteins and facilitate further studies on this plant-specific transcription factor family.
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Affiliation(s)
- Yuwen Zhang
- Zhongzhi International Institute of Agricultural Biosciences, Biology and Agriculture Research Center, University of Science and Technology Beijing, Beijing 100024, China; (Y.Z.); (Z.L.); (B.M.); (Q.H.)
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing International Science and Technology Cooperation Base of Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co., Ltd., Beijing 100192, China
| | - Ziwen Li
- Zhongzhi International Institute of Agricultural Biosciences, Biology and Agriculture Research Center, University of Science and Technology Beijing, Beijing 100024, China; (Y.Z.); (Z.L.); (B.M.); (Q.H.)
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing International Science and Technology Cooperation Base of Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co., Ltd., Beijing 100192, China
| | - Biao Ma
- Zhongzhi International Institute of Agricultural Biosciences, Biology and Agriculture Research Center, University of Science and Technology Beijing, Beijing 100024, China; (Y.Z.); (Z.L.); (B.M.); (Q.H.)
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing International Science and Technology Cooperation Base of Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co., Ltd., Beijing 100192, China
| | - Quancan Hou
- Zhongzhi International Institute of Agricultural Biosciences, Biology and Agriculture Research Center, University of Science and Technology Beijing, Beijing 100024, China; (Y.Z.); (Z.L.); (B.M.); (Q.H.)
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing International Science and Technology Cooperation Base of Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co., Ltd., Beijing 100192, China
| | - Xiangyuan Wan
- Zhongzhi International Institute of Agricultural Biosciences, Biology and Agriculture Research Center, University of Science and Technology Beijing, Beijing 100024, China; (Y.Z.); (Z.L.); (B.M.); (Q.H.)
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing International Science and Technology Cooperation Base of Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co., Ltd., Beijing 100192, China
- Correspondence: or ; Tel.: +86-10-6299-5866
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9
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Prigge MJ, Platre M, Kadakia N, Zhang Y, Greenham K, Szutu W, Pandey BK, Bhosale RA, Bennett MJ, Busch W, Estelle M. Genetic analysis of the Arabidopsis TIR1/AFB auxin receptors reveals both overlapping and specialized functions. eLife 2020; 9:54740. [PMID: 32067636 PMCID: PMC7048394 DOI: 10.7554/elife.54740] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 02/04/2020] [Indexed: 01/03/2023] Open
Abstract
The TIR1/AFB auxin co-receptors mediate diverse responses to the plant hormone auxin. The Arabidopsis genome encodes six TIR1/AFB proteins representing three of the four clades that were established prior to angiosperm radiation. To determine the role of these proteins in plant development we performed an extensive genetic analysis involving the generation and characterization of all possible multiply-mutant lines. We find that loss of all six TIR1/AFB proteins results in early embryo defects and eventually seed abortion, and yet a single wild-type allele of TIR1 or AFB2 is sufficient to support growth throughout development. Our analysis reveals extensive functional overlap between even the most distantly related TIR1/AFB genes except for AFB1. Surprisingly, AFB1 has a specialized function in rapid auxin-dependent inhibition of root growth and early phase of root gravitropism. This activity may be related to a difference in subcellular localization compared to the other members of the family.
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Affiliation(s)
- Michael J Prigge
- Section of Cell and Developmental Biology, University of California San Diego, La Jolla, United States
| | - Matthieu Platre
- Plant Molecular and Cellular Biology Laboratory and Integrative Biology Laboratory, Salk Institute for Biological Studies, La Jolla, United States
| | - Nikita Kadakia
- Section of Cell and Developmental Biology, University of California San Diego, La Jolla, United States
| | - Yi Zhang
- Section of Cell and Developmental Biology, University of California San Diego, La Jolla, United States
| | - Kathleen Greenham
- Section of Cell and Developmental Biology, University of California San Diego, La Jolla, United States
| | - Whitnie Szutu
- Section of Cell and Developmental Biology, University of California San Diego, La Jolla, United States
| | - Bipin Kumar Pandey
- Plant and Crop Sciences, School of Biosciences, University of Nottingham, Nottingham, United Kingdom
| | - Rahul Arvind Bhosale
- Plant and Crop Sciences, School of Biosciences, University of Nottingham, Nottingham, United Kingdom
| | - Malcolm J Bennett
- Plant and Crop Sciences, School of Biosciences, University of Nottingham, Nottingham, United Kingdom
| | - Wolfgang Busch
- Plant Molecular and Cellular Biology Laboratory and Integrative Biology Laboratory, Salk Institute for Biological Studies, La Jolla, United States
| | - Mark Estelle
- Section of Cell and Developmental Biology, University of California San Diego, La Jolla, United States
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