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Byregowda R, Nagarajappa N, Rajendra Prasad S, Kumar MP. Comparative regulatory network of transcripts behind radicle emergence and seedling stage of maize ( Zea mays L.). Heliyon 2024; 10:e25683. [PMID: 38370253 PMCID: PMC10869873 DOI: 10.1016/j.heliyon.2024.e25683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 02/20/2024] Open
Abstract
The transition from radicle emergence to seedling growth in maize is a crucial phase in the plant's life cycle, where rapid physiological and biochemical changes occur to facilitate successful development. In this study, we conducted a comparative transcriptomic analysis to gain a deeper understanding of the molecular processes driving this critical transition. The early divergence in gene expression patterns highlighted the upregulation of a substantial number of genes during radicle emergence. During radicle emergence, gene ontology (GO) term enrichment analysis unveiled active participation in biological processes such as chromatin assembly, cellular response to abiotic stress, and hormone signaling. This indicates that the initial stages of growth are marked by cellular expansion and adaptation to environmental stimuli. Conversely, in the seedling growth stage, GO analysis demonstrated a shift toward processes such as photosynthesis, nitrogen metabolism, and secondary metabolite biosynthesis, reflecting a transition to energy production and enhanced growth. In contrast, seedling growth was characterized by pathways related to photosynthesis and the production of gibberellins, crucial for robust seedling development. Hormonal regulation and starch metabolism were also prominent during radicle emergence, with various hormones, including auxins, diterpenoids, and brassinosteroids, driving processes like cell enlargement and stem growth. Moreover, starch and sucrose metabolism genes were expressed to mobilize stored reserves for energy during this stage. These findings offer valuable insights into the dynamic regulation of genes and pathways during this critical phase of maize development.
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Affiliation(s)
- Roopashree Byregowda
- Department of Seed Science and Technology, University of Agricultural Sciences, Bangalore 560065, India
| | - Nethra Nagarajappa
- Seed Technology Research Center, All India Co-ordinated Research Project on Seed (Crops), Gandhi Krishi Vignana Kendra, University of Agricultural Sciences, Bangalore 560065, India
| | | | - M.K. Prasanna Kumar
- Department of Plant Pathology, University of Agricultural Sciences, Bangalore, India
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Nogueira A, Puga H, Gerós H, Teixeira A. Seed germination and seedling development assisted by ultrasound: gaps and future research directions. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:583-597. [PMID: 37728938 DOI: 10.1002/jsfa.12994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 09/13/2023] [Accepted: 09/20/2023] [Indexed: 09/22/2023]
Abstract
Since the early 1930s, when the first corn hybrids were grown commercially, innovations in the agriculture industry have had an unprecedent impact worldwide, helping to meet the demands for food of an exponentially growing population. In particular, seed technology research has contributed substantially to the improvement of crop performance over the years. Ultrasonic treatment of seeds is a green technology that promises to have an impact on the food industry, enhancing germination and seedling development in different species through the stimulation of water and oxygen uptake and seed metabolism. The increase in starch degradation has been associated with the stimulation of the α-amylases of the endosperm, but relatively few reports focus on how ultrasound affects seed germination at the biochemical and molecular levels. For instance, the picture is still unclear regarding the impact of ultrasound on transcriptional reprogramming in seeds. The purpose of this review is to assess the literature on ultrasound seed treatment accurately and critically, ultimately aiming to encourage new scientific and technological breakthroughs with a real impact on worldwide agricultural production while promoting sustainable practices on biological systems. © 2023 Society of Chemical Industry.
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Affiliation(s)
- António Nogueira
- CMEMS-UMinho - Centre for Microelectromechanical Systems, University of Minho, Guimarães, Portugal
- CBMA-UMinho - Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Braga, Portugal
| | - Hélder Puga
- CMEMS-UMinho - Centre for Microelectromechanical Systems, University of Minho, Guimarães, Portugal
| | - Hernâni Gerós
- CBMA-UMinho - Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Braga, Portugal
| | - António Teixeira
- CBMA-UMinho - Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Braga, Portugal
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Yu S, Xiao Y, Lin Y, Zheng Y, Cai Q, Wei Y, Wang Y, Xie H, Zhang J. RNA-seq profiling of primary calli induced by different media and photoperiods for japonica rice 'Yunyin'. MOLECULAR BREEDING : NEW STRATEGIES IN PLANT IMPROVEMENT 2022; 42:13. [PMID: 37309407 PMCID: PMC10248677 DOI: 10.1007/s11032-022-01283-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
The induction of embryogenic calli plays a vital role in the genetic transformation and regeneration of rice (Oryza sativa L.). Despite progress in rice tissue culture, the molecular mechanisms of embryogenic callus induction remain unknown. In this study, gene expression profiles associated with calli were comprehensively analyzed during callus induction of japonica rice 'Yunyin'. We first confirmed that NMB medium with 24 h of light and 0 h of dark (NMB-L) was the optimal condition for 'Yunyin' callus induction, while J3 medium with 0 h of light and 24 h of dark (J3-D) was the worst condition. After transcriptome analysis, 33,597 unigenes were assembled, among which we identified 6,063 DEGs (Differentially Expressed Genes) related to media and seven DEGs related to photoperiod. Phenylpropanoid biosynthesis, plant hormone signal, and starch and sucrose metabolism were the top three pathways affected by media, while the circadian rhythm-plant pathway was associated with photoperiod. Furthermore, we identified two candidate genes, Os01g0965900 and Os12g0555200, affected by both medium and photoperiod. Statistical analysis of RNA-seq libraries showed that the expression levels of these two genes in J3-D calli were over 2.5 times higher than those in NMB-L calli, which was further proved by RT-qPCR analysis. Based on FPKM (Fragments Per Kilobase of transcript Per Million mapped reads), unigenes belonging to the NMB-L group were mainly assigned to ribosome, carbon metabolism, biosynthesis of amino acids, protein processing in endoplasmic reticulum, and plant hormone signal transduction pathways. We transformed Os12g0555200Nip and Os12g05552009311 into 'Nipponbare' calli and observed their effects on the growth and development process of rice calli using TEM (Transmission Electron Microscopy) and SEM (Scanning Electron Microscopy). Observations showed that Os12g05552009311 was more disadvantageous to rice callus growth than Os12g0555200Nip. Our results reveal that the Os12g0555200, identified from transcriptomic profiles, has a negative influence during 'Yunyin' callus induction. Supplementary information The online version contains supplementary material available at 10.1007/s11032-022-01283-y.
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Affiliation(s)
- Sisi Yu
- College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350019 China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice in South-China, Ministry of Agriculture/Incubator of National Key Laboratory of Germplasm Innovation and Molecular Breeding Between Fujian and Ministry of Sciences &Technology/National Engineering Laboratory of Rice for China/South Base of National Key Laboratory of Hybrid Rice, Fuzhou, 350003 China
| | - Yanjia Xiao
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350019 China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice in South-China, Ministry of Agriculture/Incubator of National Key Laboratory of Germplasm Innovation and Molecular Breeding Between Fujian and Ministry of Sciences &Technology/National Engineering Laboratory of Rice for China/South Base of National Key Laboratory of Hybrid Rice, Fuzhou, 350003 China
| | - Yuelong Lin
- College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350019 China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice in South-China, Ministry of Agriculture/Incubator of National Key Laboratory of Germplasm Innovation and Molecular Breeding Between Fujian and Ministry of Sciences &Technology/National Engineering Laboratory of Rice for China/South Base of National Key Laboratory of Hybrid Rice, Fuzhou, 350003 China
| | - Yanmei Zheng
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350019 China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice in South-China, Ministry of Agriculture/Incubator of National Key Laboratory of Germplasm Innovation and Molecular Breeding Between Fujian and Ministry of Sciences &Technology/National Engineering Laboratory of Rice for China/South Base of National Key Laboratory of Hybrid Rice, Fuzhou, 350003 China
| | - Qiuhua Cai
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350019 China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice in South-China, Ministry of Agriculture/Incubator of National Key Laboratory of Germplasm Innovation and Molecular Breeding Between Fujian and Ministry of Sciences &Technology/National Engineering Laboratory of Rice for China/South Base of National Key Laboratory of Hybrid Rice, Fuzhou, 350003 China
| | - Yidong Wei
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350019 China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice in South-China, Ministry of Agriculture/Incubator of National Key Laboratory of Germplasm Innovation and Molecular Breeding Between Fujian and Ministry of Sciences &Technology/National Engineering Laboratory of Rice for China/South Base of National Key Laboratory of Hybrid Rice, Fuzhou, 350003 China
| | - Yingheng Wang
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350019 China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice in South-China, Ministry of Agriculture/Incubator of National Key Laboratory of Germplasm Innovation and Molecular Breeding Between Fujian and Ministry of Sciences &Technology/National Engineering Laboratory of Rice for China/South Base of National Key Laboratory of Hybrid Rice, Fuzhou, 350003 China
| | - Huaan Xie
- College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350019 China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice in South-China, Ministry of Agriculture/Incubator of National Key Laboratory of Germplasm Innovation and Molecular Breeding Between Fujian and Ministry of Sciences &Technology/National Engineering Laboratory of Rice for China/South Base of National Key Laboratory of Hybrid Rice, Fuzhou, 350003 China
| | - Jianfu Zhang
- College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350019 China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice in South-China, Ministry of Agriculture/Incubator of National Key Laboratory of Germplasm Innovation and Molecular Breeding Between Fujian and Ministry of Sciences &Technology/National Engineering Laboratory of Rice for China/South Base of National Key Laboratory of Hybrid Rice, Fuzhou, 350003 China
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Marconi M, Gallemi M, Benkova E, Wabnik K. A coupled mechano-biochemical model for cell polarity guided anisotropic root growth. eLife 2021; 10:72132. [PMID: 34723798 PMCID: PMC8716106 DOI: 10.7554/elife.72132] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 10/26/2021] [Indexed: 11/21/2022] Open
Abstract
Plants develop new organs to adjust their bodies to dynamic changes in the environment. How independent organs achieve anisotropic shapes and polarities is poorly understood. To address this question, we constructed a mechano-biochemical model for Arabidopsis root meristem growth that integrates biologically plausible principles. Computer model simulations demonstrate how differential growth of neighboring tissues results in the initial symmetry-breaking leading to anisotropic root growth. Furthermore, the root growth feeds back on a polar transport network of the growth regulator auxin. Model, predictions are in close agreement with in vivo patterns of anisotropic growth, auxin distribution, and cell polarity, as well as several root phenotypes caused by chemical, mechanical, or genetic perturbations. Our study demonstrates that the combination of tissue mechanics and polar auxin transport organizes anisotropic root growth and cell polarities during organ outgrowth. Therefore, a mobile auxin signal transported through immobile cells drives polarity and growth mechanics to coordinate complex organ development.
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Affiliation(s)
- Marco Marconi
- CBGP Centro de Biotecnologia y Genomica de Plantas UPM-INIA, Pozuelo de Alarcón, Spain
| | - Marcal Gallemi
- Institute of Science and Technology (IST), Klosterneuburg, Austria
| | - Eva Benkova
- Institute of Science and Technology (IST), Klosterneuburg, Austria
| | - Krzysztof Wabnik
- CBGP Centro de Biotecnologia y Genomica de Plantas UPM-INIA, Pozuelo de Alarcón, Spain
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Qu L, Wei Z, Chen HH, Liu T, Liao K, Xue HW. Plant casein kinases phosphorylate and destabilize a cyclin-dependent kinase inhibitor to promote cell division. PLANT PHYSIOLOGY 2021; 187:917-930. [PMID: 34608955 PMCID: PMC8491028 DOI: 10.1093/plphys/kiab284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 05/27/2021] [Indexed: 05/04/2023]
Abstract
Cell cycle is one of the most fundamentally conserved biological processes of plants and mammals. Casein kinase1s (CK1s) are critical for cell proliferation in mammalian cells; however, how CK1s coordinate cell division in plants remains unknown. Through genetic and biochemical studies, here we demonstrated that plant CK1, Arabidopsis (Arabidopsis thaliana) EL1-like (AELs), regulate cell cycle/division by modulating the stability and inhibitory effects of Kip-related protein6 (KRP6) through phosphorylation. Cytological analysis showed that AELs deficiency results in suppressed cell-cycle progression mainly due to the decreased DNA replication rate at S phase and increased period of G2 phase. AELs interact with and phosphorylate KRP6 at serines 75 and 109 to stimulate KRP6's interaction with E3 ligases, thus facilitating the KRP6 degradation through the proteasome. These results demonstrate the crucial roles of CK1s/AELs in regulating cell division through modulating cell-cycle rates and elucidate how CK1s/AELs regulate cell division by destabilizing the stability of cyclin-dependent kinase inhibitor KRP6 through phosphorylation, providing insights into the plant cell-cycle regulation through CK1s-mediated posttranslational modification.
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Affiliation(s)
- Li Qu
- Joint Center for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Zhuang Wei
- Key Laboratory of Systems Biology, CAS Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China
| | - Hu-Hui Chen
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Tao Liu
- Key Laboratory of Systems Biology, CAS Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China
| | - Kan Liao
- Key Laboratory of Systems Biology, CAS Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China
| | - Hong-Wei Xue
- Joint Center for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
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Germination and the Early Stages of Seedling Development in Brachypodium distachyon. Int J Mol Sci 2018; 19:ijms19102916. [PMID: 30257527 PMCID: PMC6212949 DOI: 10.3390/ijms19102916] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 09/21/2018] [Accepted: 09/22/2018] [Indexed: 01/27/2023] Open
Abstract
Successful germination and seedling development are crucial steps in the growth of a new plant. In this study, we investigated the course of the cell cycle during germination in relation to grain hydration in the model grass Brachypodium distachyon (Brachypodium) for the first time. Flow cytometry was performed to monitor the cell cycle progression during germination and to estimate DNA content in embryo tissues. The analyses of whole zygotic embryos revealed that the relative DNA content was 2C, 4C, 8C, and 16C. Endoreplicated nuclei were detected in the scutellum and coleorhiza cells, whereas the rest of the embryo tissues only had nuclei with a 2C and 4C DNA content. This study was accompanied by a spatiotemporal profile analysis of the DNA synthetic activity in the organs of Brachypodium embryos during germination using EdU labelling. Upon imbibition, nuclear DNA replication was initiated in the radicle within 11 h and subsequently spread towards the plumule. The first EdU-labelled prophases were observed after 14 h of imbibition. Analysis of selected genes that are involved in the regulation of the cell cycle, such as those encoding cyclin-dependent kinases and cyclins, demonstrated an increase in their expression profiles.
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Velappan Y, Signorelli S, Considine MJ. Cell cycle arrest in plants: what distinguishes quiescence, dormancy and differentiated G1? ANNALS OF BOTANY 2017; 120:495-509. [PMID: 28981580 PMCID: PMC5737280 DOI: 10.1093/aob/mcx082] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 03/29/2017] [Accepted: 06/06/2017] [Indexed: 05/21/2023]
Abstract
BACKGROUND Quiescence is a fundamental feature of plant life, which enables plasticity, renewal and fidelity of the somatic cell line. Cellular quiescence is defined by arrest in a particular phase of the cell cycle, typically G1 or G2; however, the regulation of quiescence and proliferation can also be considered across wider scales in space and time. As such, quiescence is a defining feature of plant development and phenology, from meristematic stem cell progenitors to terminally differentiated cells, as well as dormant or suppressed seeds and buds. While the physiology of each of these states differs considerably, each is referred to as 'cell cycle arrest' or 'G1 arrest'. SCOPE Here the physiology and molecular regulation of (1) meristematic quiescence, (2) dormancy and (3) terminal differentiation (cell cycle exit) are considered in order to determine whether and how the molecular decisions guiding these nuclear states are distinct. A brief overview of the canonical cell cycle regulators is provided, and the genetic and genomic, as well as physiological, evidence is considered regarding two primary questions: (1) Are the canonical cell cycle regulators superior or subordinate in the regulation of quiescence? (2) Are these three modes of quiescence governed by distinct molecular controls? CONCLUSION Meristematic quiescence, dormancy and terminal differentiation are each predominantly characterized by G1 arrest but regulated distinctly, at a level largely superior to the canonical cell cycle. Meristematic quiescence is intrinsically linked to non-cell-autonomous regulation of meristem cell identity, and particularly through the influence of ubiquitin-dependent proteolysis, in partnership with reactive oxygen species, abscisic acid and auxin. The regulation of terminal differentiation shares analogous features with meristematic quiescence, albeit with specific activators and a greater role for cytokinin signalling. Dormancy meanwhile appears to be regulated at the level of chromatin accessibility, by Polycomb group-type histone modifications of particular dormancy genes.
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Affiliation(s)
- Yazhini Velappan
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia
- The School of Molecular Sciences, and The UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
| | - Santiago Signorelli
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia
- The School of Molecular Sciences, and The UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
- Departamento de Biología Vegetal, Universidad de la República, Montevideo, 12900, Uruguay
| | - Michael J Considine
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia
- The School of Molecular Sciences, and The UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
- Department of Agriculture and Food Western Australia, South Perth, WA 6151, Australia
- Centre for Plant Sciences, School of Biology, University of Leeds, Leeds LS2 9JT, UK
- For correspondence. Email
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Sun Z, Wang X, Liu Z, Gu Q, Zhang Y, Li Z, Ke H, Yang J, Wu J, Wu L, Zhang G, Zhang C, Ma Z. Genome-wide association study discovered genetic variation and candidate genes of fibre quality traits in Gossypium hirsutum L. PLANT BIOTECHNOLOGY JOURNAL 2017; 15:982-996. [PMID: 28064470 PMCID: PMC5506648 DOI: 10.1111/pbi.12693] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 11/02/2016] [Accepted: 01/05/2017] [Indexed: 05/18/2023]
Abstract
Genetic improvement of fibre quality is one of the main breeding goals for the upland cotton, Gossypium hirsutum, but there are difficulties with precise selection of traits. Therefore, it is important to improve the understanding of the genetic basis of phenotypic variation. In this study, we conducted phenotyping and genetic variation analyses of 719 diverse accessions of upland cotton based on multiple environment tests and a recently developed Cotton 63K Illumina Infinium SNP array and performed a genome-wide association study (GWAS) of fibre quality traits. A total of 10 511 polymorphic SNPs distributed in 26 chromosomes were screened across the cotton germplasms, and forty-six significant SNPs associated with five fibre quality traits were detected. These significant SNPs were scattered over 15 chromosomes and were involved in 612 unique candidate genes, many related to polysaccharide biosynthesis, signal transduction and protein translocation. Two major haplotypes for fibre length and strength were identified on chromosomes Dt11 and At07. Furthermore, by combining GWAS and transcriptome analysis, we identified 163 and 120 fibre developmental genes related to length and strength, respectively, of which a number of novel genes and 19 promising genes were screened. These results provide new insight into the genetic basis of fibre quality in G. hirsutum and provide candidate SNPs and genes to accelerate the improvement of upland cotton.
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Affiliation(s)
- Zhengwen Sun
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Xingfen Wang
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Zhengwen Liu
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Qishen Gu
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Yan Zhang
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Zhikun Li
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Huifeng Ke
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Jun Yang
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Jinhua Wu
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Liqiang Wu
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Guiyin Zhang
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Caiying Zhang
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
| | - Zhiying Ma
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry/Key Laboratory for Crop Germplasm Resources of Hebei ProvinceHebei Agricultural UniversityBaodingChina
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Stamm P, Topham AT, Mukhtar NK, Jackson MDB, Tomé DFA, Beynon JL, Bassel GW. The Transcription Factor ATHB5 Affects GA-Mediated Plasticity in Hypocotyl Cell Growth during Seed Germination. PLANT PHYSIOLOGY 2017; 173:907-917. [PMID: 27872245 PMCID: PMC5210717 DOI: 10.1104/pp.16.01099] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Accepted: 11/21/2016] [Indexed: 05/04/2023]
Abstract
Gibberellic acid (GA)-mediated cell expansion initiates the seed-to-seedling transition in plants and is repressed by DELLA proteins. Using digital single-cell analysis, we identified a cellular subdomain within the midhypocotyl, whose expansion drives the final step of this developmental transition under optimal conditions. Using network inference, the transcription factor ATHB5 was identified as a genetic factor whose localized expression promotes GA-mediated expansion specifically within these cells. Both this protein and its putative growth-promoting target EXPANSIN3 are repressed by DELLA, and coregulated at single-cell resolution during seed germination. The cellular domains of hormone sensitivity were explored within the Arabidopsis (Arabidopsis thaliana) embryo by putting seeds under GA-limiting conditions and quantifying cellular growth responses. The middle and upper hypocotyl have a greater requirement for GA to promote cell expansion than the lower embryo axis. Under these conditions, germination was still completed following enhanced growth within the radicle and lower axis. Under GA-limiting conditions, the athb5 mutant did not show a phenotype at the level of seed germination, but it did at a cellular level with reduced cell expansion in the hypocotyl relative to the wild type. These data reveal that the spatiotemporal cell expansion events driving this transition are not determinate, and the conditional use of GA-ATHB5-mediated hypocotyl growth under optimal conditions may be used to optionally support rapid seedling growth. This study demonstrates that multiple genetic and spatiotemporal cell expansion mechanisms underlie the seed to seedling transition in Arabidopsis.
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Affiliation(s)
- Petra Stamm
- School of Biosciences, College of Life and Environmental and Life Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom (P.S., A.T.T., N.K.M., M.D.B.J., G.W.B); and
- School of Life Sciences, Gibbet Hill Campus, The University of Warwick, Coventry CV4 7AL, United Kingdom (D.F.A.T., J.L.B.)
| | - Alexander T Topham
- School of Biosciences, College of Life and Environmental and Life Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom (P.S., A.T.T., N.K.M., M.D.B.J., G.W.B); and
- School of Life Sciences, Gibbet Hill Campus, The University of Warwick, Coventry CV4 7AL, United Kingdom (D.F.A.T., J.L.B.)
| | - Nur Karimah Mukhtar
- School of Biosciences, College of Life and Environmental and Life Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom (P.S., A.T.T., N.K.M., M.D.B.J., G.W.B); and
- School of Life Sciences, Gibbet Hill Campus, The University of Warwick, Coventry CV4 7AL, United Kingdom (D.F.A.T., J.L.B.)
| | - Matthew D B Jackson
- School of Biosciences, College of Life and Environmental and Life Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom (P.S., A.T.T., N.K.M., M.D.B.J., G.W.B); and
- School of Life Sciences, Gibbet Hill Campus, The University of Warwick, Coventry CV4 7AL, United Kingdom (D.F.A.T., J.L.B.)
| | - Daniel F A Tomé
- School of Biosciences, College of Life and Environmental and Life Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom (P.S., A.T.T., N.K.M., M.D.B.J., G.W.B); and
- School of Life Sciences, Gibbet Hill Campus, The University of Warwick, Coventry CV4 7AL, United Kingdom (D.F.A.T., J.L.B.)
| | - Jim L Beynon
- School of Biosciences, College of Life and Environmental and Life Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom (P.S., A.T.T., N.K.M., M.D.B.J., G.W.B); and
- School of Life Sciences, Gibbet Hill Campus, The University of Warwick, Coventry CV4 7AL, United Kingdom (D.F.A.T., J.L.B.)
| | - George W Bassel
- School of Biosciences, College of Life and Environmental and Life Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom (P.S., A.T.T., N.K.M., M.D.B.J., G.W.B); and
- School of Life Sciences, Gibbet Hill Campus, The University of Warwick, Coventry CV4 7AL, United Kingdom (D.F.A.T., J.L.B.)
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