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Ferrol N, Azcón-Aguilar C, Pérez-Tienda J. Review: Arbuscular mycorrhizas as key players in sustainable plant phosphorus acquisition: An overview on the mechanisms involved. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 280:441-447. [PMID: 30824024 DOI: 10.1016/j.plantsci.2018.11.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 10/29/2018] [Accepted: 11/19/2018] [Indexed: 05/23/2023]
Abstract
Phosphorus (P) is a poorly available macronutrient essential for plant growth and development and consequently for successful crop yield and ecosystem productivity. To cope with P limitations plants have evolved strategies for enhancing P uptake and/or improving P efficiency use. The universal 450-million-yr-old arbuscular mycorrhizal (AM) (fungus-root) symbioses are one of the most successful and widespread strategies to maximize access of plants to available P. AM fungi biotrophically colonize the root cortex of most plant species and develop an extraradical mycelium which overgrows the nutrient depletion zone of the soil surrounding plant roots. This hyphal network is specialized in the acquisition of low mobility nutrients from soil, particularly P. During the last years, molecular biology techniques coupled to novel physiological approaches have provided fascinating contributions to our understanding of the mechanisms of symbiotic P transport. Mycorrhiza-specific plant phosphate transporters, which are required not only for symbiotic P transfer but also for maintenance of the symbiosis, have been identified. The present review provides an overview of the contribution of AM fungi to plant P acquisition and an update of recent findings on the physiological, molecular and regulatory mechanisms of P transport in the AM symbiosis.
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Affiliation(s)
- Nuria Ferrol
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, CSIC, C. Profesor Albareda 1, 18008, Granada, Spain.
| | - Concepción Azcón-Aguilar
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, CSIC, C. Profesor Albareda 1, 18008, Granada, Spain
| | - Jacob Pérez-Tienda
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, CSIC, C. Profesor Albareda 1, 18008, Granada, Spain
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Collum TD, Lutton E, Raines CD, Dardick C, Culver JN. Identification of phloem-associated translatome alterations during leaf development in Prunus domestica L. HORTICULTURE RESEARCH 2019; 6:16. [PMID: 30729006 PMCID: PMC6355854 DOI: 10.1038/s41438-018-0092-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 09/24/2018] [Accepted: 09/26/2018] [Indexed: 06/01/2023]
Abstract
Phloem plays a fundamental role in plants by transporting hormones, nutrients, proteins, RNAs, and carbohydrates essential for plant growth and development. However, the identity of the underlying phloem genes and pathways remain enigmatic especially in agriculturally important perennial crops, in part, due to the technical difficulty of phloem sampling. Here, we used two phloem-specific promoters and a translating ribosome affinity purification (TRAP) strategy to characterize the phloem translatome during leaf development at 2, 4, and 6 weeks post vernalization in plum (Prunus domestica L.). Results provide insight into the changing phloem processes that occur during leaf development. These processes included the early activation of DNA replication genes that are likely involved in phloem cell division during leaf expansion, as well as the upregulation of phloem genes associated with sink to source conversion, induction of defense processes, and signaling for reproduction. Combined these results reveal the dynamics of phloem gene expression during leaf development and establish the TRAP system as a powerful tool for studying phloem-specific functions and responses in trees.
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Affiliation(s)
- Tamara D. Collum
- Institute for Bioscience and Biotechnology Research, College Park, MD USA
| | - Elizabeth Lutton
- USDA-ARS, Appalachian Fruit Research Laboratory, Kearneysville, WV USA
| | - C. Douglas Raines
- USDA-ARS, Appalachian Fruit Research Laboratory, Kearneysville, WV USA
| | | | - James N. Culver
- Institute for Bioscience and Biotechnology Research, College Park, MD USA
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD USA
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Abstract
Plant growth and productivity are greatly impacted by environmental stresses. Therefore, plants have evolved mechanisms which allow them to adapt to abiotic stresses through alterations in gene expression and metabolism. In recent years, studies have investigated the role of long noncoding RNA (lncRNA) in regulating gene expression in plants and characterized their involvement in various biological functions through their regulation of DNA methylation, DNA structural modifications, histone modifications, and RNA-RNA interactions. Genome-wide transcriptome analyses have identified various types of noncoding RNAs (ncRNAs) that respond to abiotic stress. These ncRNAs are in addition to the well-known housekeeping ncRNAs, such as rRNAs, tRNAs, snoRNAs, and snRNAs. In this review, recent research pertaining to the role of lncRNAs in the response of plants to abiotic stress is summarized and discussed.
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Affiliation(s)
- Akihiro Matsui
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, Japan.
- Plant Epigenome Regulation Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama, Japan.
| | - Motoaki Seki
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, Japan.
- Plant Epigenome Regulation Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama, Japan.
- Kihara Institute for Biological Research, Yokohama City University, Yokohama, Kanagawa, Japan.
- Core Research for Evolutional Science and Technology, Japan Science and Technology, Kawaguchi, Saitama, Japan.
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104
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Huen A, Bally J, Smith P. Identification and characterisation of microRNAs and their target genes in phosphate-starved Nicotiana benthamiana by small RNA deep sequencing and 5'RACE analysis. BMC Genomics 2018; 19:940. [PMID: 30558535 PMCID: PMC6296076 DOI: 10.1186/s12864-018-5258-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 11/16/2018] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Phosphorus is an important macronutrient that is severely lacking in soils. In plants, specific microRNAs (miRNAs) essential for nutrient management and the regulation of stress responses are responsible for the control of many phosphate starvation responses. Further understanding of conserved and species-specific microRNA species has potential implications for the development of crops tolerant to soils with low phosphate. RESULTS This study identified and characterised phosphate starvation-responsive miRNAs in the native Australian tobacco Nicotiana benthamiana. Small RNA libraries were constructed and sequenced from phosphate-starved plant leaves, stems and roots. Twenty-four conserved miRNA families and 36 species-specific miRNAs were identified. The majority of highly phosphate starvation-responsive miRNAs were highly conserved, comprising of members from the miR399, miR827, and miR2111 families. In addition, two miRNA-star species were identified to be phosphate starvation-responsive. A total of seven miRNA targets were confirmed using RLM-5'RACE to be cleaved by five miRNA families, including two confirmed cleavage targets for Nbe-miR399 species, one for Nbe-miR2111, and two for Nbe-miR398. A number of N. benthamiana-specific features for conserved miRNAs were identified, including species-specific miRNA targets predicted or confirmed for miR399, miR827, and miR398. CONCLUSIONS Our results give an insight into the phosphate starvation-responsive miRNAs of Nicotiana benthamiana, and indicate that the phosphate starvation response pathways in N. benthamiana contain both highly conserved and species-specific components.
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Affiliation(s)
- Amanda Huen
- School of Life and Environmental Sciences, The University of Sydney, Camperdown, NSW, 2006, Australia
| | - Julia Bally
- Centre for Tropical Crops and Biocommodities, Queensland University of Technology, QLD, Brisbane, 4000, Australia
| | - Penelope Smith
- Department of Animal, Plant and Soil Sciences, La Trobe University, Bundoora, VIC, 3086, Australia.
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105
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Tian L, Liu H, Ren L, Ku L, Wu L, Li M, Wang S, Zhou J, Song X, Zhang J, Dou D, Liu H, Tang G, Chen Y. MicroRNA 399 as a potential integrator of photo-response, phosphate homeostasis, and sucrose signaling under long day condition. BMC PLANT BIOLOGY 2018; 18:290. [PMID: 30463514 PMCID: PMC6249786 DOI: 10.1186/s12870-018-1460-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 10/03/2018] [Indexed: 05/21/2023]
Abstract
BACKGROUND Photoperiod-sensitivity is a critical endogenous regulatory mechanism for plant growth and development under specific environmental conditions, while phosphate and sucrose signaling processes play key roles in cell growth and organ initiation. MicroRNA399 is phosphate-responsive, but, whether it has roles in other metabolic processes remains unknown. RESULTS MicroRNA399 was determined to be sucrose-responsive through a microRNA array assay. High levels of sucrose inhibited the accumulation of microRNA399 family under phosphate starvation conditions in Arabidopsis thaliana. Similarly, exogenous sucrose supplementation also reduced microRNA399 expression in maize at developmental transition stages. RNA sequencing of a near-isogenic line(photoperiod-sensitive) line and its recurrent parent Huangzao4, a photoperiod-insensitive line, was conducted at various developmental stages. Members of microRNA399 family were down-regulated under long-day conditions in the photoperiod-sensitive near-isogenic line that accumulated more sucrose in vivo compared with the control line Huangzao4. CONCLUSION MicroRNA399s may play central roles in the integration of sucrose sensing and photoperiodic responses under long day conditions in maize.
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Affiliation(s)
- Lei Tian
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002 China
| | - Haiping Liu
- Department of Biological Sciences, Michigan Technological University, Houghton, MI 49931 USA
| | - Ligang Ren
- College of Life Science, Northwest Agriculture and Forestry University, Yangling, 712100 China
| | - Lixia Ku
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002 China
| | - Liuji Wu
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002 China
| | - Mingna Li
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002 China
| | - Shunxi Wang
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002 China
| | - Jinlong Zhou
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002 China
| | - Xiaoheng Song
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002 China
| | - Jun Zhang
- Cereal Institute, Henan Academy of Agricultural Science/Henan Provincial Key Laboratory of Maize Biology, Zhengzhou, 450002 China
| | - Dandan Dou
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002 China
| | - Huafeng Liu
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002 China
| | - Guiliang Tang
- Department of Biological Sciences, Michigan Technological University, Houghton, MI 49931 USA
| | - Yanhui Chen
- College of Agronomy, National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002 China
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106
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Liu L, Chen X. Intercellular and systemic trafficking of RNAs in plants. NATURE PLANTS 2018; 4:869-878. [PMID: 30390090 PMCID: PMC7155933 DOI: 10.1038/s41477-018-0288-5] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 09/21/2018] [Indexed: 05/14/2023]
Abstract
Plants have evolved dynamic and complex networks of cell-to-cell communication to coordinate and adapt their growth and development to a variety of environmental changes. In addition to small molecules, such as metabolites and phytohormones, macromolecules such as proteins and RNAs also act as signalling agents in plants. As information molecules, RNAs can move locally between cells through plasmodesmata, and over long distances through phloem. Non-cell-autonomous RNAs may act as mobile signals to regulate plant development, nutrient allocation, gene silencing, antiviral defence, stress responses and many other physiological processes in plants. Recent work has shed light on mobile RNAs and, in some cases, uncovered their roles in intercellular and systemic signalling networks. This review summarizes the current knowledge of local and systemic RNA movement, and discusses the potential regulatory mechanisms and biological significance of RNA trafficking in plants.
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Affiliation(s)
- Lin Liu
- Guangdong Provincial Key Laboratory for Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China
- Longhua Bioindustry and Innovation Research Institute, Shenzhen University, Shenzhen, China
| | - Xuemei Chen
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, CA, USA.
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107
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Inoue K, Araki T, Endo M. Oscillator networks with tissue-specific circadian clocks in plants. Semin Cell Dev Biol 2018; 83:78-85. [DOI: 10.1016/j.semcdb.2017.09.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/04/2017] [Accepted: 09/05/2017] [Indexed: 12/31/2022]
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108
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Michigami T, Kawai M, Yamazaki M, Ozono K. Phosphate as a Signaling Molecule and Its Sensing Mechanism. Physiol Rev 2018; 98:2317-2348. [DOI: 10.1152/physrev.00022.2017] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
In mammals, phosphate balance is maintained by influx and efflux via the intestines, kidneys, bone, and soft tissue, which involves multiple sodium/phosphate (Na+/Pi) cotransporters, as well as regulation by several hormones. Alterations in the levels of extracellular phosphate exert effects on both skeletal and extra-skeletal tissues, and accumulating evidence has suggested that phosphate itself evokes signal transduction to regulate gene expression and cell behavior. Several in vitro studies have demonstrated that an elevation in extracellular Piactivates fibroblast growth factor receptor, Raf/MEK (mitogen-activated protein kinase/ERK kinase)/ERK (extracellular signal-regulated kinase) pathway and Akt pathway, which might involve the type III Na+/Picotransporter PiT-1. Excessive phosphate loading can lead to various harmful effects by accelerating ectopic calcification, enhancing oxidative stress, and dysregulating signal transduction. The responsiveness of mammalian cells to altered extracellular phosphate levels suggests that they may sense and adapt to phosphate availability, although the precise mechanism for phosphate sensing in mammals remains unclear. Unicellular organisms, such as bacteria and yeast, use some types of Pitransporters and other molecules, such as kinases, to sense the environmental Piavailability. Multicellular animals may need to integrate signals from various organs to sense the phosphate levels as a whole organism, similarly to higher plants. Clarification of the phosphate-sensing mechanism in humans may lead to the development of new therapeutic strategies to prevent and treat diseases caused by phosphate imbalance.
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Affiliation(s)
- Toshimi Michigami
- Department of Bone and Mineral Research, Research Institute, Osaka Women’s and Children’s Hospital, Osaka Prefectural Hospital Organization, Izumi, Osaka, Japan; and Department of Pediatrics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Masanobu Kawai
- Department of Bone and Mineral Research, Research Institute, Osaka Women’s and Children’s Hospital, Osaka Prefectural Hospital Organization, Izumi, Osaka, Japan; and Department of Pediatrics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Miwa Yamazaki
- Department of Bone and Mineral Research, Research Institute, Osaka Women’s and Children’s Hospital, Osaka Prefectural Hospital Organization, Izumi, Osaka, Japan; and Department of Pediatrics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Keiichi Ozono
- Department of Bone and Mineral Research, Research Institute, Osaka Women’s and Children’s Hospital, Osaka Prefectural Hospital Organization, Izumi, Osaka, Japan; and Department of Pediatrics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
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109
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Lin SS, Bowman JL. MicroRNAs in Marchantia polymorpha. THE NEW PHYTOLOGIST 2018; 220:409-416. [PMID: 29959894 DOI: 10.1111/nph.15294] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 05/24/2018] [Indexed: 06/08/2023]
Abstract
Contents Summary 409 I. Introduction 409 II. RNA silencing machinery in Marchantia polymorpha 410 III. miRNA prediction by integrating omics approach 410 IV. miRNAs and their targets in Marchantia polymorpha 410 V. Mpo-miR390-mediated MpTAS3 tasiRNA biogenesis and potential tasiARF target MpARF2 414 VI. Artificial miRNA and CRISPR-CAS9 edited MIR gene in Marchantia polymorpha 414 VII. Conclusions 415 Acknowledgements 415 References 415 SUMMARY: The liverwort Marchantia polymorpha occupies an important phylogenetic position for comparative studies of land plant gene regulation. Multiple gene regulatory pathways mediated by small RNAs, including microRNAs (miRNAs), trans-acting short-interfering RNAs, and heterochromatic siRNAs often associated with RNA-dependent DNA methylation, have been characterized in flowering plants. Genes for essential components for all of these small RNA-mediated gene silencing pathways are found in M. polymorpha as well as the moss Phsycomitrella patens, indicating that these pathways existed in the ancestral land plant. However, only seven miRNAs are conserved across land plants, with both ancestral and novel targets identified in M. polymorpha. There is little or no evidence that any of these conserved miRNAs are present in algae. As with other plants investigated, most miRNAs in M. polypmorpha exhibit lineage-specific evolution. Application of artificial miRNA and CRISPR-Cas9 technologies in genetic studies of M. polymorpha provide avenues to further investigate miRNA biology.
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Affiliation(s)
- Shih-Shun Lin
- Institute of Biotechnology, National Taiwan University, Taipei, 106, Taiwan
| | - John L Bowman
- School of Biological Sciences, Monash University, Melbourne, Vic., 3800, Australia
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110
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Sinclair SA, Senger T, Talke IN, Cobbett CS, Haydon MJ, Krämer U. Systemic Upregulation of MTP2- and HMA2-Mediated Zn Partitioning to the Shoot Supplements Local Zn Deficiency Responses. THE PLANT CELL 2018; 30:2463-2479. [PMID: 30150315 PMCID: PMC6241274 DOI: 10.1105/tpc.18.00207] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 07/09/2018] [Accepted: 08/24/2018] [Indexed: 05/08/2023]
Abstract
Low bioavailable concentrations of the micronutrient zinc (Zn) limit agricultural production on 40% of cultivated land. Here, we demonstrate that plant acclimation to Zn deficiency involves systemic regulation. Physiological Zn deficiency of Arabidopsis thaliana shoots results in increased root transcript levels of the membrane transport protein-encoding genes METAL TRANSPORT PROTEIN2 (MTP2) and HEAVY METAL ATPASE2 (HMA2), which are unresponsive to the local Zn status of roots. MTP2 and HMA2 act additively in the partitioning of Zn from roots to shoots. Chimeric GFP fusion proteins of MTP2 complement an mtp2 mutant and localize in the endoplasmic reticulum (ER) membrane of the outer cell layers from elongation to root hair zone of lateral roots. MTP2 restores Zn tolerance in a hypersensitive yeast mutant. These results are consistent with cell-to-cell movement of Zn toward the root vasculature inside the ER-luminal continuum through the desmotubules of plasmodesmata, under Zn deficiency. The previously described Zn deficiency response comprises transcriptional activation of target genes, including ZINC-REGULATED TRANSPORTER IRON-REGULATED TRANSPORTER PROTEIN genes ZIP4 and ZIP9, by the F-group bZIP transcription factors bZIP19 and bZIP23. We show that ZIP4 and ZIP9 respond to the local Zn status in both roots and shoots, in contrast to the systemic regulation identified here. Our findings are relevant for crop management and improvement toward combating human nutritional Zn deficiency that affects 30 to 50% of the world's population.
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Affiliation(s)
- Scott A Sinclair
- Department of Molecular Genetics and Physiology of Plants, Ruhr University Bochum, 44801 Bochum, Germany
- BIOQUANT Center and Heidelberg Institute of Plant Sciences, University of Heidelberg, D-69120 Heidelberg, Germany
| | - Toralf Senger
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Ina N Talke
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | | | - Michael J Haydon
- Department of Molecular Genetics and Physiology of Plants, Ruhr University Bochum, 44801 Bochum, Germany
- BIOQUANT Center and Heidelberg Institute of Plant Sciences, University of Heidelberg, D-69120 Heidelberg, Germany
| | - Ute Krämer
- Department of Molecular Genetics and Physiology of Plants, Ruhr University Bochum, 44801 Bochum, Germany
- BIOQUANT Center and Heidelberg Institute of Plant Sciences, University of Heidelberg, D-69120 Heidelberg, Germany
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
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111
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Huang J, Huang Z, Zhou X, Xia C, Imran M, Wang S, Xu C, Zha M, Liu Y, Zhang C. Tissue-specific transcriptomic profiling of Plantago major provides insights for the involvement of vasculature in phosphate deficiency responses. Mol Genet Genomics 2018; 294:159-175. [PMID: 30267144 DOI: 10.1007/s00438-018-1496-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 09/24/2018] [Indexed: 01/26/2023]
Abstract
The vasculature of higher plants is important with transport of both nutrient and information molecules. To understand the correspondence of this tissue in molecular responses under phosphate (Pi) deficiency, Plantago major, a model plant for vasculature biology study, was chosen in our analysis. After RNA-Seq and de novo transcriptome assembly of 24 libraries prepared from the vasculature of P. major, 37,309 unigenes with a mean length of 1571 base pairs were obtained. Upon 24 h of Pi deficiency, 237 genes were shown to be differentially expressed in the vasculature of P. major. Among these genes, only 27 have been previously identified to be specifically expressed in the vasculature tissues in other plant species. Temporal expression of several marker genes associated with Pi deficiency showed that the time period of first 24 h is at the beginning stage of more dynamic expression patterns. In this study, we found several physiological processes, e.g., "phosphate metabolism and remobilization", "sucrose metabolism, loading and synthesis", "plant hormone metabolism and signal transduction", "transcription factors", and "metabolism of other minerals", were mainly involved in early responses to Pi deficiency in the vasculature. A number of vasculature genes with promising roles in Pi deficiency adaptation have been identified and deserve further functional characterization. This study clearly demonstrated that plant vasculature is actively involved in Pi deficiency responses and understanding of this process may help to create plants proficient to offset Pi deficiency.
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Affiliation(s)
- Jing Huang
- Department of Agronomy, Purdue University, West Lafayette, IN, 47907, USA
| | | | - Xiangjun Zhou
- Department of Agronomy, Purdue University, West Lafayette, IN, 47907, USA
| | - Chao Xia
- Department of Agronomy, Purdue University, West Lafayette, IN, 47907, USA
| | - Muhammad Imran
- Department of Soil and Environmental Sciences, University College of Agriculture, University of Sargodha, Sargodha, 40100, Pakistan
| | - Shujuan Wang
- Department of Agronomy, Purdue University, West Lafayette, IN, 47907, USA
| | - Congshan Xu
- Department of Agronomy, Purdue University, West Lafayette, IN, 47907, USA
| | - Manrong Zha
- Department of Agronomy, Purdue University, West Lafayette, IN, 47907, USA
| | - Yan Liu
- The Institute of Sericulture, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, Zhejiang, China
| | - Cankui Zhang
- Department of Agronomy, Purdue University, West Lafayette, IN, 47907, USA. .,Purdue Center for Plant Biology, Purdue University, West Lafayette, IN, 47907, USA.
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112
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Liu Z, Wang X, Chen X, Shi G, Bai Q, Xiao K. TaMIR1139: a wheat miRNA responsive to Pi-starvation, acts a critical mediator in modulating plant tolerance to Pi deprivation. PLANT CELL REPORTS 2018; 37:1293-1309. [PMID: 29947952 DOI: 10.1007/s00299-018-2313-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Accepted: 06/06/2018] [Indexed: 05/18/2023]
Abstract
Wheat miRNA member TaMIR1139 targets genes functional in various families and plays crucial roles in regulating plant Pi starvation tolerance. Through regulating target genes at posttranscriptional or translational level, plant miRNAs are involved in mediating diverse biological processes associated with growth, development, and responses to adverse stresses. In this study, we characterized the expression pattern and function of TaMIR1139, a miRNA member of wheat (T. aestivum) under Pi deprivation. TaMIR1139 precursor is also present in N. tabucum, suggesting the conserved nature of miR1139 across monocots and eudicots. TaMIR1139 targets seven genes within different families. The transcripts abundance of TaMIR1139 was induced upon Pi deprivation and the upregulated expression under Pi starvation was downregulated by the Pi recovery treatment, In contrast, the genes targeted by TaMIR1139 exhibited reduced transcripts upon Pi starvation and their downregulated expression was recovered by Pi-recovery condition, suggesting the regulation of them under TaMIR1139 through a cleavage mechanism. TaMIR1139 overexpression conferred the Pi-deprived plants improved phenotype, biomass, photosynthesis, and Pi acquisition. Transcriptome analysis identified numerous genes involving biological process, cellular components, and molecular function were differentially expressed in the TaMIR1139 overexpression lines, which suggests the TaMIR1139-mediated plant Pi starvation tolerance to be associated with the role of miRNA in extensively modulating the transcript profiling. A phosphate transporter (PT) gene NtPT showed significantly upregulated expression in TaMIR1139 overexpression lines; overexpression of it conferred plants improved Pi acquisition upon Pi starvation, suggesting its contribution to the TaMIR1139-mediated plant low-Pi stress resistance. Our investigation indicates that TaMIR1139 is critical in plant Pi starvation tolerance through transcriptionally regulating the target genes and modulating the Pi stress-defensiveness processes.
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Affiliation(s)
- Zhipeng Liu
- College of Agronomy, Agricultural University of Hebei, Baoding, 071001, People's Republic of China
- Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, 071001, People's Republic of China
| | - Xiaoying Wang
- College of Agronomy, Agricultural University of Hebei, Baoding, 071001, People's Republic of China
- Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, 071001, People's Republic of China
| | - Xi Chen
- College of Agronomy, Agricultural University of Hebei, Baoding, 071001, People's Republic of China
- Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, 071001, People's Republic of China
| | - Guiqing Shi
- College of Agronomy, Agricultural University of Hebei, Baoding, 071001, People's Republic of China
- Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, 071001, People's Republic of China
| | - Qianqian Bai
- College of Agronomy, Agricultural University of Hebei, Baoding, 071001, People's Republic of China
- Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, 071001, People's Republic of China
| | - Kai Xiao
- College of Agronomy, Agricultural University of Hebei, Baoding, 071001, People's Republic of China.
- Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, 071001, People's Republic of China.
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113
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Ruffel S. Nutrient-Related Long-Distance Signals: Common Players and Possible Cross-Talk. PLANT & CELL PHYSIOLOGY 2018; 59:1723-1732. [PMID: 30085239 DOI: 10.1093/pcp/pcy152] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 07/19/2018] [Indexed: 05/20/2023]
Abstract
Nutrient fluctuations are more a rule rather than an exception in the life of sessile organisms such as plants. Despite this constraint that adds up to abiotic and biotic stresses, plants are able to accomplish their life cycle thanks to an efficient signaling network that reciprocally controls nutrient acquisition and use with growth and development. The majority of nutrients are acquired by the root system where multiple local signaling pathways that rely on nutrient-sensing systems are implemented to direct root growth toward soil resources. Moreover, long-distance signaling plays an essential role in integrating nutrient availability at the whole-plant level and adjusting nutrient acquisition to plant growth requirements. By studying the signaling network for single mineral nutrients, several long-distance signals traveling between roots and shoots and taking a diversity of forms have been identified and are summarized here. However, the nutritional environment is multifactorial, adding a tremendous complexity for our understanding of the nutrient signaling network as a unique system. For instance, long-distance signals are expected to support this nutrient cross-talk in part, but the mechanisms are still largely unknown. Therefore, the involvement of possible long-distance signals as conveyers of nutrient cross-talk is discussed here together with approaches and strategies that are now considered to build a picture from the nutrient signaling puzzle.
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Affiliation(s)
- Sandrine Ruffel
- BPMP, INRA, CNRS, Universit� de Montpellier, Montpellier SupAgro, Montpellier, France
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114
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Chen Y, Wu P, Zhao Q, Tang Y, Chen Y, Li M, Jiang H, Wu G. Overexpression of a Phosphate Starvation Response AP2/ERF Gene From Physic Nut in Arabidopsis Alters Root Morphological Traits and Phosphate Starvation-Induced Anthocyanin Accumulation. FRONTIERS IN PLANT SCIENCE 2018; 9:1186. [PMID: 30177937 PMCID: PMC6109760 DOI: 10.3389/fpls.2018.01186] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 07/24/2018] [Indexed: 05/02/2023]
Abstract
Physic nut (Jatropha curcas L.) is highly tolerant of barren environments and a significant biofuel plant. To probe mechanisms of its tolerance mechanisms, we have analyzed genome-wide transcriptional profiles of 8-week-old physic nut seedlings subjected to Pi deficiency (P-) for 2 and 16 days, and Pi-sufficient conditions (P+) controls. We identified several phosphate transporters, purple acid phosphatases, and enzymes of membrane lipid metabolism among the 272 most differentially expressed genes. Genes of the miR399/PHO2 pathway (IPS, miR399, and members of the SPX family) showed alterations in expression. We also found that expression of several transcription factor genes was modulated by phosphate starvation stress in physic nut seedlings, including an AP2/ERF gene (JcERF035), which was down-regulated in both root and leaf tissues under Pi-deprivation. In JcERF035-overexpressing Arabidopsis lines both numbers and lengths of first-order lateral roots were dramatically reduced, but numbers of root hairs on the primary root tip were significantly elevated, under both P+ and P- conditions. Furthermore, the transgenic plants accumulated less anthocyanin but had similar Pi contents to wild-type plants under P-deficiency conditions. Expression levels of the tested genes related to anthocyanin biosynthesis and regulation, and genes induced by low phosphate, were significantly lower in shoots of transgenic lines than in wild-type plants under P-deficiency. Our data show that down-regulation of the JcERF035 gene might contribute to the regulation of root system architecture and both biosynthesis and accumulation of anthocyanins in aerial tissues of plants under low Pi conditions.
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Affiliation(s)
- Yanbo Chen
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Pingzhi Wu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Qianqian Zhao
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yuehui Tang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yaping Chen
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Meiru Li
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Huawu Jiang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Guojiang Wu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
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115
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Gating of miRNA movement at defined cell-cell interfaces governs their impact as positional signals. Nat Commun 2018; 9:3107. [PMID: 30082703 PMCID: PMC6079027 DOI: 10.1038/s41467-018-05571-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 07/13/2018] [Indexed: 01/02/2023] Open
Abstract
Mobile small RNAs serve as local positional signals in development and coordinate stress responses across the plant. Despite its central importance, an understanding of how the cell-to-cell movement of small RNAs is governed is lacking. Here, we show that miRNA mobility is precisely regulated through a gating mechanism polarised at defined cell–cell interfaces. This generates directional movement between neighbouring cells that limits long-distance shoot-to-root trafficking, and underpins domain-autonomous behaviours of small RNAs within stem cell niches. We further show that the gating of miRNA mobility occurs independent of mechanisms controlling protein movement, identifying the small RNA as the mobile unit. These findings reveal gate-keepers of cell-to-cell small RNA mobility generate selectivity in long-distance signalling, and help safeguard functional domains within dynamic stem cell niches while mitigating a ‘signalling gridlock’ in contexts where developmental patterning events occur in close spatial and temporal vicinity. Movement of small RNA between cells is critical to plant development and stress responses. Here the authors uncover a gate-keeping mechanism that can restrict small RNA movement at cell-cell interfaces, providing selectivity in long-distance signalling and limiting the scope of local mobility.
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116
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Du Q, Wang K, Zou C, Xu C, Li WX. The PILNCR1-miR399 Regulatory Module Is Important for Low Phosphate Tolerance in Maize. PLANT PHYSIOLOGY 2018; 177:1743-1753. [PMID: 29967097 PMCID: PMC6084674 DOI: 10.1104/pp.18.00034] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 06/25/2018] [Indexed: 05/21/2023]
Abstract
The regulation of adaptive responses to phosphorus (P) deficiency by the microRNA399 (miR399)/PHOSPHATE2 (PHO2) pathway has been well studied in Arabidopsis (Arabidopsis thaliana) but not in maize (Zea mays). Here, we show that miR399 transcripts are strongly induced in maize by phosphate (Pi) deficiency. Transgenic maize plants that overexpressed MIR399b accumulated excessive amounts of P in their shoots and displayed typical Pi-toxicity phenotypes. We reannotated ZmPHO2 with an additional 1,165 bp of the 5' untranslated region. miR399-guided posttranscriptional repression of ZmPHO2 was mainly observed in the P-efficient lines. We identified Pi-deficiency-induced long-noncoding RNA1 (PILNCR1) from our strand-specific RNA libraries. Transient expression assays in Nicotiana benthamiana and maize leaf protoplasts demonstrated that PILNCR1 inhibits ZmmiR399-guided cleavage of ZmPHO2 The abundance of PILNCR1 was significantly higher in P-inefficient lines than in P-efficient lines, which is consistent with the abundance of ZmmiR399 transcripts. These results indicate that the interaction between PILNCR1 and miR399 is important for tolerance to low Pi in maize.
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Affiliation(s)
- Qingguo Du
- Institute of Crop Science, National Engineering Laboratory for Crop Molecular Breeding, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Kai Wang
- Institute of Crop Science, National Engineering Laboratory for Crop Molecular Breeding, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Cheng Zou
- Institute of Crop Science, National Engineering Laboratory for Crop Molecular Breeding, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Cheng Xu
- Institute of Crop Science, National Engineering Laboratory for Crop Molecular Breeding, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Wen-Xue Li
- Institute of Crop Science, National Engineering Laboratory for Crop Molecular Breeding, Chinese Academy of Agricultural Sciences, Beijing 100081, China
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117
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Zhang L, Li G, Li Y, Min J, Kronzucker HJ, Shi W. Tomato plants ectopically expressing Arabidopsis GRF9 show enhanced resistance to phosphate deficiency and improved fruit production in the field. JOURNAL OF PLANT PHYSIOLOGY 2018; 226:31-39. [PMID: 29698910 DOI: 10.1016/j.jplph.2018.04.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/15/2018] [Accepted: 04/16/2018] [Indexed: 06/08/2023]
Abstract
Agronomic performance of transgenic tomato overexpressing functional genes has rarely been investigated in the field. In an attempt to improve low-phosphate (P) stress tolerance of tomato (Solanum lycopersicum) plants and promote tomato fruit production in the field, an expression vector containing cDNA to an Arabidopsis 14-3-3 protein, General Regulatory Factor 9 (GRF9), driven by a cauliflower mosaic virus 35S promoter, was transferred into tomato plants. Transgenic expression of GRF9 was ascertained by quantitative real-time PCR analysis. The degree of low-P tolerance in transgenic plants was found to be significantly greater than that in wild-type plants, and reflected in improved root development and enhanced P content under hydroponic conditions. For transgenic tomato, roots had higher P uptake, as evidenced by tissue P content and relative expression of the genes LePT1 and LePT2 in both normal and low-P hydroponic solutions. GRF9 overexpressors had greatly enhanced proton extrusion from roots and heightened activity of the plasma-membrane H+-ATPase (PM H+-ATPase) in roots under low-P hydroponic conditions. Thus, in addition to enhanced root development, higher expression of genes coding for phosphate transporters and improved capacity for acidification in the rhizosphere emerged as key mechanisms underpinning improved P acquisition in transgenic tomato plants in soil. Subsequent field trials measuring tomato fruit production at two P levels, indicated that GRF9 can indeed improve total tomato production and may play a role in early fruit maturity. Our results suggest that the heterologous Arabidopsis GRF9 gene can confer resistance to P deficiency in transgenic tomato plants and promote fruit production.
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Affiliation(s)
- Lili Zhang
- University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Guangjie Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yilin Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Ju Min
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Herbert J Kronzucker
- School of BioSciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Weiming Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
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118
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MicroRNAs in durum wheat seedlings under chronic and short-term nitrogen stress. Funct Integr Genomics 2018; 18:645-657. [PMID: 29948458 DOI: 10.1007/s10142-018-0619-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 05/29/2018] [Accepted: 05/31/2018] [Indexed: 10/14/2022]
Abstract
Nitrogen is an essential macronutrient for plant growth and reproduction. In durum wheat, an appropriate nitrogen soil availability is essential for an optimal seed development. miRNAs contribute to the environmental change adaptation of plants through the regulation of important genes involved in stress processes. In this work, nitrogen stress response was evaluated in durum wheat seedlings of Ciccio and Svevo cultivars. Eight small RNA libraries from leaves and roots of chronically stressed plants were sequenced to detect conserved and novel miRNAs. A total of 294 miRNAs were identified, 7 of which were described here for the first time. The expression level of selected miRNAs and target genes was analyzed by qPCR in seedlings subjected to chronic (Ciccio and Svevo, leaves and roots) or short-term (Svevo roots) stress conditions. Some miRNAs showed an immediate stress response, and their level of expression was either maintained or returned to a basal level during a long-term stress. Other miRNAs showed a gradual up- or downregulation during the short-term stress. The newly identified miRNA ttu-novel-106 showed an immediate strongly downregulation after nitrogen stress, which was negatively correlated with the expression of MYB-A, its putative target gene. PHO2 gene was significantly upregulated after 24-48-h stress, corresponding to a downregulation of miR399b. Ttu-miR399b putative binding sites in the 5' UTR region of the Svevo PHO2 gene were identified in the A and B genomes. Both MYB-A and PHO2 genes were validated for their cleavage site using 5' RACE assay.
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119
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Wang L, Liu D. Functions and regulation of phosphate starvation-induced secreted acid phosphatases in higher plants. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 271:108-116. [PMID: 29650148 DOI: 10.1016/j.plantsci.2018.03.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 02/18/2018] [Accepted: 03/04/2018] [Indexed: 05/20/2023]
Abstract
Phosphorus is essential for plant growth and development, but levels of inorganic phosphate (Pi), the major form of phosphorus that plants assimilate, are quite limiting in most soils. To cope with Pi deficiency, plants trigger a suite of adaptive responses, including the induction and secretion of acid phosphatases (APases). In this article, we describe how Pi starvation-induced (PSI) APases are analyzed, and we provide a brief historical review of their identification. We then discuss the current understanding of the functions of PSI-secreted APases and how these APases are regulated at the molecular level. Finally, we provide a perspective on the future direction of research in this field.
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Affiliation(s)
- Liangsheng Wang
- Plant Molecular Biology (Botany), Department Biology I, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Dong Liu
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing, China.
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120
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Kuo HF, Hsu YY, Lin WC, Chen KY, Munnik T, Brearley CA, Chiou TJ. Arabidopsis inositol phosphate kinases IPK1 and ITPK1 constitute a metabolic pathway in maintaining phosphate homeostasis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018. [PMID: 29779236 DOI: 10.1101/270355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 05/02/2018] [Accepted: 05/09/2018] [Indexed: 05/27/2023]
Abstract
Emerging studies have suggested that there is a close link between inositol phosphate (InsP) metabolism and cellular phosphate (Pi ) homeostasis in eukaryotes; however, whether a common InsP species is deployed as an evolutionarily conserved metabolic messenger to mediate Pi signaling remains unknown. Here, using genetics and InsP profiling combined with Pi -starvation response (PSR) analysis in Arabidopsis thaliana, we showed that the kinase activity of inositol pentakisphosphate 2-kinase (IPK1), an enzyme required for phytate (inositol hexakisphosphate; InsP6 ) synthesis, is indispensable for maintaining Pi homeostasis under Pi -replete conditions, and inositol 1,3,4-trisphosphate 5/6-kinase 1 (ITPK1) plays an equivalent role. Although both ipk1-1 and itpk1 mutants exhibited decreased levels of InsP6 and diphosphoinositol pentakisphosphate (PP-InsP5 ; InsP7 ), disruption of another ITPK family enzyme, ITPK4, which correspondingly caused depletion of InsP6 and InsP7 , did not display similar Pi -related phenotypes, which precludes these InsP species from being effectors. Notably, the level of d/l-Ins(3,4,5,6)P4 was concurrently elevated in both ipk1-1 and itpk1 mutants, which showed a specific correlation with the misregulated Pi phenotypes. However, the level of d/l-Ins(3,4,5,6)P4 is not responsive to Pi starvation that instead manifests a shoot-specific increase in the InsP7 level. This study demonstrates a more nuanced picture of the intersection of InsP metabolism and Pi homeostasis and PSRs than has previously been elaborated, and additionally establishes intermediate steps to phytate biosynthesis in plant vegetative tissues.
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Affiliation(s)
- Hui-Fen Kuo
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 115, Taiwan
| | - Yu-Ying Hsu
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 115, Taiwan
| | - Wei-Chi Lin
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 115, Taiwan
| | - Kai-Yu Chen
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 115, Taiwan
| | - Teun Munnik
- Swammerdam Institute for Life Sciences, University of Amsterdam, Science Park 904, Amsterdam, 1098XH, The Netherlands
| | - Charles A Brearley
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Tzyy-Jen Chiou
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 115, Taiwan
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121
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Kuo HF, Hsu YY, Lin WC, Chen KY, Munnik T, Brearley CA, Chiou TJ. Arabidopsis inositol phosphate kinases IPK1 and ITPK1 constitute a metabolic pathway in maintaining phosphate homeostasis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 95:613-630. [PMID: 29779236 DOI: 10.1111/tpj.13974] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 05/02/2018] [Accepted: 05/09/2018] [Indexed: 05/21/2023]
Abstract
Emerging studies have suggested that there is a close link between inositol phosphate (InsP) metabolism and cellular phosphate (Pi ) homeostasis in eukaryotes; however, whether a common InsP species is deployed as an evolutionarily conserved metabolic messenger to mediate Pi signaling remains unknown. Here, using genetics and InsP profiling combined with Pi -starvation response (PSR) analysis in Arabidopsis thaliana, we showed that the kinase activity of inositol pentakisphosphate 2-kinase (IPK1), an enzyme required for phytate (inositol hexakisphosphate; InsP6 ) synthesis, is indispensable for maintaining Pi homeostasis under Pi -replete conditions, and inositol 1,3,4-trisphosphate 5/6-kinase 1 (ITPK1) plays an equivalent role. Although both ipk1-1 and itpk1 mutants exhibited decreased levels of InsP6 and diphosphoinositol pentakisphosphate (PP-InsP5 ; InsP7 ), disruption of another ITPK family enzyme, ITPK4, which correspondingly caused depletion of InsP6 and InsP7 , did not display similar Pi -related phenotypes, which precludes these InsP species from being effectors. Notably, the level of d/l-Ins(3,4,5,6)P4 was concurrently elevated in both ipk1-1 and itpk1 mutants, which showed a specific correlation with the misregulated Pi phenotypes. However, the level of d/l-Ins(3,4,5,6)P4 is not responsive to Pi starvation that instead manifests a shoot-specific increase in the InsP7 level. This study demonstrates a more nuanced picture of the intersection of InsP metabolism and Pi homeostasis and PSRs than has previously been elaborated, and additionally establishes intermediate steps to phytate biosynthesis in plant vegetative tissues.
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Affiliation(s)
- Hui-Fen Kuo
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 115, Taiwan
| | - Yu-Ying Hsu
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 115, Taiwan
| | - Wei-Chi Lin
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 115, Taiwan
| | - Kai-Yu Chen
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 115, Taiwan
| | - Teun Munnik
- Swammerdam Institute for Life Sciences, University of Amsterdam, Science Park 904, Amsterdam, 1098XH, The Netherlands
| | - Charles A Brearley
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Tzyy-Jen Chiou
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 115, Taiwan
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122
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Abstract
Nitrogen (N) fertilizer has a major influence on the yield and quality. Understanding and optimising the response of crop plants to nitrogen fertilizer usage is of central importance in enhancing food security and agricultural sustainability. In this study, the analysis of gene regulatory networks reveals multiple genes and biological processes in response to N. Two microarray studies have been used to infer components of the nitrogen-response network. Since they used different array technologies, a map linking the two probe sets to the maize B73 reference genome has been generated to allow comparison. Putative Arabidopsis homologues of maize genes were used to query the Biological General Repository for Interaction Datasets (BioGRID) network, which yielded the potential involvement of three transcription factors (TFs) (GLK5, MADS64 and bZIP108) and a Calcium-dependent protein kinase. An Artificial Neural Network was used to identify influential genes and retrieved bZIP108 and WRKY36 as significant TFs in both microarray studies, along with genes for Asparagine Synthetase, a dual-specific protein kinase and a protein phosphatase. The output from one study also suggested roles for microRNA (miRNA) 399b and Nin-like Protein 15 (NLP15). Co-expression-network analysis of TFs with closely related profiles to known Nitrate-responsive genes identified GLK5, GLK8 and NLP15 as candidate regulators of genes repressed under low Nitrogen conditions, while bZIP108 might play a role in gene activation.
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123
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Kisko M, Bouain N, Safi A, Medici A, Akkers RC, Secco D, Fouret G, Krouk G, Aarts MGM, Busch W, Rouached H. LPCAT1 controls phosphate homeostasis in a zinc-dependent manner. eLife 2018; 7:e32077. [PMID: 29453864 PMCID: PMC5826268 DOI: 10.7554/elife.32077] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 02/15/2018] [Indexed: 12/25/2022] Open
Abstract
All living organisms require a variety of essential elements for their basic biological functions. While the homeostasis of nutrients is highly intertwined, the molecular and genetic mechanisms of these dependencies remain poorly understood. Here, we report a discovery of a molecular pathway that controls phosphate (Pi) accumulation in plants under Zn deficiency. Using genome-wide association studies, we first identified allelic variation of the Lyso-PhosphatidylCholine (PC) AcylTransferase 1 (LPCAT1) gene as the key determinant of shoot Pi accumulation under Zn deficiency. We then show that regulatory variation at the LPCAT1 locus contributes significantly to this natural variation and we further demonstrate that the regulation of LPCAT1 expression involves bZIP23 TF, for which we identified a new binding site sequence. Finally, we show that in Zn deficient conditions loss of function of LPCAT1 increases the phospholipid Lyso-PhosphatidylCholine/PhosphatidylCholine ratio, the expression of the Pi transporter PHT1;1, and that this leads to shoot Pi accumulation.
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Affiliation(s)
- Mushtak Kisko
- BPMP, Univ Montpellier, CNRS, INRA, SupAgroMontpellierFrance
| | - Nadia Bouain
- BPMP, Univ Montpellier, CNRS, INRA, SupAgroMontpellierFrance
| | - Alaeddine Safi
- BPMP, Univ Montpellier, CNRS, INRA, SupAgroMontpellierFrance
| | - Anna Medici
- BPMP, Univ Montpellier, CNRS, INRA, SupAgroMontpellierFrance
| | - Robert C Akkers
- Laboratory of GeneticsWageningen UniversityWageningenNetherlands
| | - David Secco
- BPMP, Univ Montpellier, CNRS, INRA, SupAgroMontpellierFrance
| | | | - Gabriel Krouk
- BPMP, Univ Montpellier, CNRS, INRA, SupAgroMontpellierFrance
| | - Mark GM Aarts
- Laboratory of GeneticsWageningen UniversityWageningenNetherlands
| | - Wolfgang Busch
- Gregor Mendel InstituteAustrian Academy of Sciences, Vienna BiocenterViennaAustria
- Plant Molecular and Cellular Biology LaboratorySalk Institute for Biological StudiesLa JollaUnited States
| | - Hatem Rouached
- BPMP, Univ Montpellier, CNRS, INRA, SupAgroMontpellierFrance
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124
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Kisko M, Bouain N, Safi A, Medici A, Akkers RC, Secco D, Fouret G, Krouk G, Aarts MG, Busch W, Rouached H. LPCAT1 controls phosphate homeostasis in a zinc-dependent manner. eLife 2018; 7:32077. [PMID: 29453864 DOI: 10.7554/elife.32077.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 02/15/2018] [Indexed: 05/22/2023] Open
Abstract
All living organisms require a variety of essential elements for their basic biological functions. While the homeostasis of nutrients is highly intertwined, the molecular and genetic mechanisms of these dependencies remain poorly understood. Here, we report a discovery of a molecular pathway that controls phosphate (Pi) accumulation in plants under Zn deficiency. Using genome-wide association studies, we first identified allelic variation of the Lyso-PhosphatidylCholine (PC) AcylTransferase 1 (LPCAT1) gene as the key determinant of shoot Pi accumulation under Zn deficiency. We then show that regulatory variation at the LPCAT1 locus contributes significantly to this natural variation and we further demonstrate that the regulation of LPCAT1 expression involves bZIP23 TF, for which we identified a new binding site sequence. Finally, we show that in Zn deficient conditions loss of function of LPCAT1 increases the phospholipid Lyso-PhosphatidylCholine/PhosphatidylCholine ratio, the expression of the Pi transporter PHT1;1, and that this leads to shoot Pi accumulation.
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Affiliation(s)
- Mushtak Kisko
- BPMP, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France
| | - Nadia Bouain
- BPMP, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France
| | - Alaeddine Safi
- BPMP, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France
| | - Anna Medici
- BPMP, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France
| | - Robert C Akkers
- Laboratory of Genetics, Wageningen University, Wageningen, Netherlands
| | - David Secco
- BPMP, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France
| | | | - Gabriel Krouk
- BPMP, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France
| | - Mark Gm Aarts
- Laboratory of Genetics, Wageningen University, Wageningen, Netherlands
| | - Wolfgang Busch
- Gregor Mendel Institute, Austrian Academy of Sciences, Vienna Biocenter, Vienna, Austria
- Plant Molecular and Cellular Biology Laboratory, Salk Institute for Biological Studies, La Jolla, United States
| | - Hatem Rouached
- BPMP, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France
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125
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Gai YP, Zhao HN, Zhao YN, Zhu BS, Yuan SS, Li S, Guo FY, Ji XL. MiRNA-seq-based profiles of miRNAs in mulberry phloem sap provide insight into the pathogenic mechanisms of mulberry yellow dwarf disease. Sci Rep 2018; 8:812. [PMID: 29339758 PMCID: PMC5770470 DOI: 10.1038/s41598-018-19210-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 12/20/2017] [Indexed: 11/09/2022] Open
Abstract
A wide range of miRNAs have been identified as phloem-mobile molecules that play important roles in coordinating plant development and physiology. Phytoplasmas are associated with hundreds of plant diseases, and the pathogenesis involved in the interactions between phytoplasmas and plants is still poorly understood. To analyse the molecular mechanisms of phytoplasma pathogenicity, the miRNAs profiles in mulberry phloem saps were examined in response to phytoplasma infection. A total of 86 conserved miRNAs and 19 novel miRNAs were identified, and 30 conserved miRNAs and 13 novel miRNAs were differentially expressed upon infection with phytoplasmas. The target genes of the differentially expressed miRNAs are involved in diverse signalling pathways showing the complex interactions between mulberry and phytoplasma. Interestingly, we found that mul-miR482a-5p was up-regulated in the infected phloem saps, and grafting experiments showed that it can be transported from scions to rootstock. Based on the results, the complexity and roles of the miRNAs in phloem sap and the potential molecular mechanisms of their changes were discussed. It is likely that the phytoplasma-responsive miRNAs in the phloem sap modulate multiple pathways and work cooperatively in response to phytoplasma infection, and their expression changes may be responsible for some symptoms in the infected plants.
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Affiliation(s)
- Ying-Ping Gai
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Huai-Ning Zhao
- College of Forestry, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Ya-Nan Zhao
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Bing-Sen Zhu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Shuo-Shuo Yuan
- College of Forestry, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Shuo Li
- College of Forestry, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Fang-Yue Guo
- College of Forestry, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Xian-Ling Ji
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China. .,College of Forestry, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China.
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126
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Litholdo CG, Eamens AL, Waterhouse PM. The phenotypic and molecular assessment of the non-conserved Arabidopsis MICRORNA163/S-ADENOSYL-METHYLTRANSFERASE regulatory module during biotic stress. Mol Genet Genomics 2017; 293:503-523. [PMID: 29196849 DOI: 10.1007/s00438-017-1399-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 11/22/2017] [Indexed: 10/18/2022]
Abstract
In plants, microRNAs (miRNAs) have evolved in parallel to the protein-coding genes that they target for expression regulation, and miRNA-directed gene expression regulation is central to almost every cellular process. MicroRNA, miR163, is unique to the Arabidopsis genus and is processed into a 24-nucleotide (nt) mature small regulatory RNA (sRNA) from a single precursor transcript transcribed from a single locus, the MIR163 gene. The MIR163 locus is a result of a recent inverted duplication event of one of the five closely related S-ADENOSYL-METHYLTRANSFERASE genes that the mature miR163 sRNA targets for expression regulation. Currently, however, little is known about the role of the miR163/S-ADENOSYL-METHYLTRANSFERASE regulatory module in response to biotic stress. Here, we document the expression domains of MIR163 and the S-ADENOSYL-METHYLTRANSFERASE target genes following fusion of their putative promoter sequences to the β-glucuronidase (GUS) reporter gene and subsequent in planta expression. Further, we report on our phenotypic and molecular assessment of Arabidopsis thaliana plants with altered miR163 accumulation, namely the mir163-1 and mir163-2 insertion knockout mutants and the miR163 overexpression line, the MIR163-OE plant. Finally, we reveal miR163 accumulation and S-ADENOSYL-METHYLTRANSFERASE target gene expression post treatment with the defence elicitors, salicylic acid and jasmonic acid, and following Fusarium oxysporum infection, wounding, and herbivory attack. Together, the work presented here provides a comprehensive new biological insight into the role played by the Arabidopsis genus-specific miR163/S-ADENOSYL-METHYLTRANSFERASE regulatory module in normal A. thaliana development and during the exposure of A. thaliana plants to biotic stress.
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Affiliation(s)
- Celso Gaspar Litholdo
- School of Life and Environmental Sciences, The University of Sydney, Camperdown, NSW, 2006, Australia. .,Citrus Biotechnology Lab, Centro de Citricultura, Instituto Agronômico de Campinas, Cordeirópolis, SP, 13490-000, Brazil.
| | - Andrew Leigh Eamens
- School of Life and Environmental Sciences, The University of Sydney, Camperdown, NSW, 2006, Australia.,School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Peter Michael Waterhouse
- School of Life and Environmental Sciences, The University of Sydney, Camperdown, NSW, 2006, Australia.,Centre for Tropical Crops and Biocommodities, Queensland University of Technology, Brisbane, QLD, 4001, Australia
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127
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Puga MI, Rojas-Triana M, de Lorenzo L, Leyva A, Rubio V, Paz-Ares J. Novel signals in the regulation of Pi starvation responses in plants: facts and promises. CURRENT OPINION IN PLANT BIOLOGY 2017; 39:40-49. [PMID: 28587933 DOI: 10.1016/j.pbi.2017.05.007] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/09/2017] [Accepted: 05/19/2017] [Indexed: 05/10/2023]
Abstract
Plants have evolved numerous adaptive developmental and metabolic responses to cope with growth in conditions of limited phosphate (Pi). Regulation of these Pi starvation responses (PSR) at the organism level involves not only cellular Pi perception in different organs, but also inter-organ communication of Pi levels via systemic signaling. Here we summarize recent discoveries on Pi starvation sensing and signaling, with special emphasis on structure-function studies that showed a role for inositol polyphosphates (InsP) as intracellular Pi signals, and on genomic studies that identified a large number of mRNAs with inter-organ mobility, which provide an immense source of potential systemic signals in the control of PSR and other responses.
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Affiliation(s)
- María Isabel Puga
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain
| | - Mónica Rojas-Triana
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain
| | - Laura de Lorenzo
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40546, USA
| | - Antonio Leyva
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain
| | - Vicente Rubio
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain
| | - Javier Paz-Ares
- Department of Plant Molecular Genetics, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain.
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128
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Chien PS, Chiang CB, Wang Z, Chiou TJ. MicroRNA-mediated signaling and regulation of nutrient transport and utilization. CURRENT OPINION IN PLANT BIOLOGY 2017; 39:73-79. [PMID: 28668626 DOI: 10.1016/j.pbi.2017.06.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 06/10/2017] [Accepted: 06/12/2017] [Indexed: 05/23/2023]
Abstract
MicroRNAs (miRNAs), a group of small-RNA regulators, control diverse developmental processes and stress responses. Recent studies of nutrient-responsive miRNAs have offered novel insights into how plants regulate gene expression to coordinate endogenous demand and external availability of nutrients. Here, we review the mechanisms mediated by miRNAs to facilitate nutrient transport and utilization and show that miRNAs: first, control nutrient uptake and translocation by targeting nutrient transporters or their regulators; second, adjust nutrient metabolism by redistributing nutrients for biosynthesis of more essential compounds; and third, modulate root development and microbial symbiosis to exploit soil nutrients. We also highlight the long-distance movement of miRNAs in maintaining whole-plant nutrient homeostasis and propose several directions for future research.
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Affiliation(s)
- Pei-Shan Chien
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Chih-Bin Chiang
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Zhengrui Wang
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Tzyy-Jen Chiou
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei 115, Taiwan.
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129
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Pal S, Kisko M, Dubos C, Lacombe B, Berthomieu P, Krouk G, Rouached H. TransDetect Identifies a New Regulatory Module Controlling Phosphate Accumulation. PLANT PHYSIOLOGY 2017; 175:916-926. [PMID: 28827455 PMCID: PMC5619893 DOI: 10.1104/pp.17.00568] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 08/16/2017] [Indexed: 05/18/2023]
Abstract
Identifying transcription factor (TFs) cooperation controlling target gene expression is still an arduous challenge. The accuracy of current methods at genome scale significantly drops with the increase in number of genes, which limits their applicability to more complex genomes, like animals and plants. Here, we developed an algorithm, TransDetect, able to predict TF combinations controlling the expression level of a given gene. TransDetect was used to identify novel TF modules regulating the expression of Arabidopsis (Arabidopsis thaliana) phosphate transporter PHO1;H3 comprising MYB15, MYB84, bHLH35, and ICE1. These TFs were confirmed to interact between themselves and with the PHO1;H3 promoter. Phenotypic and genetic analyses of TF mutants enable the organization of these four TFs and PHO1;H3 in a new gene regulatory network controlling phosphate accumulation in zinc-dependent manner. This demonstrates the potential of TransDetect to extract directionality in nondynamic transcriptomes and to provide a blueprint to identify gene regulatory network involved in a given biological process.
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Affiliation(s)
- Sikander Pal
- Laboratoire de Biochimie and Physiologie Moléculaire des Plantes, UMR CNRS/INRA/Montpellier Supagro/UM, Institut de Biologie Intégrative des Plantes 'Claude Grignon', 34060 Montpellier, France
| | - Mushtak Kisko
- Laboratoire de Biochimie and Physiologie Moléculaire des Plantes, UMR CNRS/INRA/Montpellier Supagro/UM, Institut de Biologie Intégrative des Plantes 'Claude Grignon', 34060 Montpellier, France
| | - Christian Dubos
- Laboratoire de Biochimie and Physiologie Moléculaire des Plantes, UMR CNRS/INRA/Montpellier Supagro/UM, Institut de Biologie Intégrative des Plantes 'Claude Grignon', 34060 Montpellier, France
| | - Benoit Lacombe
- Laboratoire de Biochimie and Physiologie Moléculaire des Plantes, UMR CNRS/INRA/Montpellier Supagro/UM, Institut de Biologie Intégrative des Plantes 'Claude Grignon', 34060 Montpellier, France
| | - Pierre Berthomieu
- Laboratoire de Biochimie and Physiologie Moléculaire des Plantes, UMR CNRS/INRA/Montpellier Supagro/UM, Institut de Biologie Intégrative des Plantes 'Claude Grignon', 34060 Montpellier, France
| | - Gabriel Krouk
- Laboratoire de Biochimie and Physiologie Moléculaire des Plantes, UMR CNRS/INRA/Montpellier Supagro/UM, Institut de Biologie Intégrative des Plantes 'Claude Grignon', 34060 Montpellier, France
| | - Hatem Rouached
- Laboratoire de Biochimie and Physiologie Moléculaire des Plantes, UMR CNRS/INRA/Montpellier Supagro/UM, Institut de Biologie Intégrative des Plantes 'Claude Grignon', 34060 Montpellier, France
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130
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131
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Wang Y, Zhang J, Cui W, Guan C, Mao W, Zhang Z. Improvement in Fruit Quality by Overexpressing miR399a in Woodland Strawberry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7361-7370. [PMID: 28783952 DOI: 10.1021/acs.jafc.7b01687] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Fruit quality is an important trait in strawberry and is determined by many factors. The soluble solid content in strawberry fruits is positively related to the phosphorus content. MicroRNA399 (miR399) is involved in the regulation of phosphate (Pi) homeostasis. However, the effect of miR399 on strawberry quality remains unknown. In this study, miR399a-overexpressing transgenic woodland strawberries (Fragaria vesca) were obtained via an Agrobacterium-mediated transformation. The phosphorus (P) content was 1.1-fold to 2.1-fold higher in the leaves and fruits of the miR399a-overexpressing plants than in the wild type (WT). However, the P content in the miR399a-overexpressing plants was decreased by 25% to 45% in the roots. The primary root length of the transgenic lines in both the high-Pi and low-Pi media was shorter than that of the WT. Interestingly, the transgenic lines in pots under Pi-sufficient conditions grew better than the WT, and the fruit quality, including the contents of fructose and glucose and soluble solid, was significantly higher in the transgenic lines than in the WT. The overexpression of miR399a in strawberry can be used to improve the parameters involved in fruit quality and provides information regarding breeding nutrient-improved strawberry.
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Affiliation(s)
- Yan Wang
- College of Horticulture, Shenyang Agricultural University , Shenyang 110866, China
| | - Junxiang Zhang
- College of Horticulture, Shenyang Agricultural University , Shenyang 110866, China
| | - Weixu Cui
- College of Horticulture, Shenyang Agricultural University , Shenyang 110866, China
| | - Chunyue Guan
- College of Horticulture, Shenyang Agricultural University , Shenyang 110866, China
| | - Wenjuan Mao
- College of Horticulture, Shenyang Agricultural University , Shenyang 110866, China
| | - Zhihong Zhang
- College of Horticulture, Shenyang Agricultural University , Shenyang 110866, China
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132
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Li S, Ying Y, Secco D, Wang C, Narsai R, Whelan J, Shou H. Molecular interaction between PHO2 and GIGANTEA reveals a new crosstalk between flowering time and phosphate homeostasis in Oryza sativa. PLANT, CELL & ENVIRONMENT 2017; 40:1487-1499. [PMID: 28337762 DOI: 10.1111/pce.12945] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 02/18/2017] [Accepted: 02/24/2017] [Indexed: 05/08/2023]
Abstract
Plants are often confronted to nutrient limiting conditions, such as inorganic phosphate (Pi) deficiency, resulting in a reduction in growth and yield. PHO2, encoding a ubiquitin-conjugating E2 enzyme, is a central component of the Pi-starvation response signalling pathway. A yeast-two-hybrid screen using Oryza sativa (rice) PHO2 as bait, revealed an interaction between OsPHO2 and OsGIGANTEA, a key regulator of flowering time, which was confirmed using bimolecular fluorescence complementation (BiFC). Characterization of rice Osgi and Ospho2 mutants revealed that they displayed several similar phenotypic features supporting a physiological role for this interaction. Reduced growth, leaf tip necrosis, delayed flowering and over-accumulation of Pi in leaves compared to wild type were shared features of Osgi and Ospho2 plants. Pi analysis of individual leaves demonstrated that Osgi, similar to Ospho2 mutants, were impaired in Pi remobilization from old to young leaves, albeit to a lesser extent. Transcriptome analyses revealed more than 55% of the genes differentially expressed in Osgi plants overlapped with the set of differentially expressed genes in Ospho2 plants. The interaction between OsPHO2 and OsGI links high-level regulators of Pi homeostasis and development in rice.
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Affiliation(s)
- Shuai Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Yinghui Ying
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - David Secco
- Australian Research Council Centre of Excellence in Plant Energy Biology, University of Western Australia, Crawley, 6009, WA, Australia
| | - Chuang Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Reena Narsai
- ARC Centre of Excellence in Plant Energy Biology, Department of Animal, Plant and Soil Science, School of Life Science, La Trobe University, Bundoora, VIC, 3086, Australia
| | - James Whelan
- ARC Centre of Excellence in Plant Energy Biology, Department of Animal, Plant and Soil Science, School of Life Science, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Huixia Shou
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
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133
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Huen AK, Rodriguez-Medina C, Ho AYY, Atkins CA, Smith PMC. Long-distance movement of phosphate starvation-responsive microRNAs in Arabidopsis. PLANT BIOLOGY (STUTTGART, GERMANY) 2017; 19:643-649. [PMID: 28322489 DOI: 10.1111/plb.12568] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 03/16/2017] [Indexed: 05/07/2023]
Abstract
Plant microRNAs are small RNAs that are important for genetic regulation of processes such as plant development or environmental responses. Specific microRNAs accumulate in the phloem during phosphate starvation, and may act as long-distance signalling molecules. We performed quantitative PCR on Arabidopsis hypocotyl micrograft tissues of wild-type and hen1-6 mutants to assess the mobility of several phosphate starvation-responsive microRNA species. In addition to the previously confirmed mobile species miR399d, the corresponding microRNA* (miR399d*) was identified for the first time as mobile between shoots and roots. Translocation by phosphate-responsive microRNAs miR827 and miR2111a between shoots and roots during phosphate starvation was evident, while their respective microRNA*s were not mobile. The results suggest that long-distance mobility of microRNA species is selective and can occur without the corresponding duplex strand. Movement of miR399d* and root-localised accumulation of miR2111a* opens the potential for persisting microRNA*s to be mobile and functional in novel pathways during phosphate starvation responses.
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Affiliation(s)
- A K Huen
- Plant Molecular Biology Lab, School of Life and Environmental Sciences, The University of Sydney, Camperdown, NSW, Australia
| | - C Rodriguez-Medina
- The Colombian Agricultural Research Corporation (Corpoica), Palmira, Valle del Cauca, Columbia
| | - A Y Y Ho
- Plant Molecular Biology Lab, School of Life and Environmental Sciences, The University of Sydney, Camperdown, NSW, Australia
| | - C A Atkins
- Centre for Plant Genetics and Breeding, The University of Western Australia, Crawley, Perth, WA, Australia
| | - P M C Smith
- Plant Molecular Biology Lab, School of Life and Environmental Sciences, The University of Sydney, Camperdown, NSW, Australia
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134
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Calabrese S, Kohler A, Niehl A, Veneault-Fourrey C, Boller T, Courty PE. Transcriptome analysis of the Populus trichocarpa-Rhizophagus irregularis Mycorrhizal Symbiosis: Regulation of Plant and Fungal Transportomes under Nitrogen Starvation. PLANT & CELL PHYSIOLOGY 2017; 58:1003-1017. [PMID: 28387868 DOI: 10.1093/pcp/pcx044] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 03/17/2017] [Indexed: 05/21/2023]
Abstract
Nutrient transfer is a key feature of the arbuscular mycorrhizal (AM) symbiosis. Valuable mineral nutrients are transferred from the AM fungus to the plant, increasing its fitness and productivity, and, in exchange, the AM fungus receives carbohydrates as an energy source from the plant. Here, we analyzed the transcriptome of the Populus trichocarpa-Rhizophagus irregularis symbiosis using RNA-sequencing of non-mycorrhizal or mycorrhizal fine roots, with a focus on the effect of nitrogen (N) starvation. In R. irregularis, we identified 1,015 differentially expressed genes, whereby N starvation led to a general induction of gene expression. Genes of the functional classes of cell growth, membrane biogenesis and cell structural components were highly abundant. Interestingly, N starvation also led to a general induction of fungal transporters, indicating increased nutrient demand upon N starvation. In non-mycorrhizal P. trichocarpa roots, 1,341 genes were differentially expressed under N starvation. Among the 953 down-regulated genes in N starvation, most were involved in metabolic processes including amino acids, carbohydrate and inorganic ion transport, while the 342 up-regulated genes included many defense-related genes. Mycorrhization led to the up-regulation of 549 genes mainly involved in secondary metabolite biosynthesis and transport; only 24 genes were down-regulated. Mycorrhization specifically induced expression of three ammonium transporters and one phosphate transporter, independently of the N conditions, corroborating the hypothesis that these transporters are important for symbiotic nutrient exchange. In conclusion, our data establish a framework of gene expression in the two symbiotic partners under high-N and low-N conditions.
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Affiliation(s)
- Silvia Calabrese
- Department of Environmental Sciences, Botany, Zurich-Basel Plant Science Center, University of Basel, Hebelstrasse, Basel, Switzerland
| | - Annegret Kohler
- INRA, UMR1136 Interactions Arbres-Microorganismes, Champenoux, France
- Université de Lorraine, UMR1136 Interactions Arbres-Microorganismes, Vandoeuvre-lès-Nancy, France
| | - Annette Niehl
- Department of Environmental Sciences, Botany, Zurich-Basel Plant Science Center, University of Basel, Hebelstrasse, Basel, Switzerland
| | - Claire Veneault-Fourrey
- INRA, UMR1136 Interactions Arbres-Microorganismes, Champenoux, France
- Université de Lorraine, UMR1136 Interactions Arbres-Microorganismes, Vandoeuvre-lès-Nancy, France
| | - Thomas Boller
- Department of Environmental Sciences, Botany, Zurich-Basel Plant Science Center, University of Basel, Hebelstrasse, Basel, Switzerland
| | - Pierre-Emmanuel Courty
- Department of Environmental Sciences, Botany, Zurich-Basel Plant Science Center, University of Basel, Hebelstrasse, Basel, Switzerland
- Agroécologie, AgroSupDijon, CNRS, INRA, Université de Bourgogne Franche-Comté, Dijon, France
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135
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Heuer S, Gaxiola R, Schilling R, Herrera-Estrella L, López-Arredondo D, Wissuwa M, Delhaize E, Rouached H. Improving phosphorus use efficiency: a complex trait with emerging opportunities. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2017; 90:868-885. [PMID: 27859875 DOI: 10.1111/tpj.13423] [Citation(s) in RCA: 127] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 11/02/2016] [Accepted: 11/07/2016] [Indexed: 05/18/2023]
Abstract
Phosphorus (P) is one of the essential nutrients for plants, and is indispensable for plant growth and development. P deficiency severely limits crop yield, and regular fertilizer applications are required to obtain high yields and to prevent soil degradation. To access P from the soil, plants have evolved high- and low-affinity Pi transporters and the ability to induce root architectural changes to forage P. Also, adjustments of numerous cellular processes are triggered by the P starvation response, a tightly regulated process in plants. With the increasing demand for food as a result of a growing population, the demand for P fertilizer is steadily increasing. Given the high costs of fertilizers and in light of the fact that phosphate rock, the source of P fertilizer, is a finite natural resource, there is a need to enhance P fertilizer use efficiency in agricultural systems and to develop plants with enhanced Pi uptake and internal P-use efficiency (PUE). In this review we will provide an overview of continuing relevant research and highlight different approaches towards developing crops with enhanced PUE. In this context, we will summarize our current understanding of root responses to low phosphorus conditions and will emphasize the importance of combining PUE with tolerance of other stresses, such as aluminum toxicity. Of the many genes associated with Pi deficiency, this review will focus on those that hold promise or are already at an advanced stage of testing (OsPSTOL1, AVP1, PHO1 and OsPHT1;6). Finally, an update is provided on the progress made exploring alternative technologies, such as phosphite fertilizer.
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Affiliation(s)
- Sigrid Heuer
- University of Adelaide / Australian Centre for Plant Functional Genomics (ACPFG), PMB 1, Glen Osmond, 5064, Australia
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Paces J, Nic M, Novotny T, Svoboda P. Literature review of baseline information to support the risk assessment of RNAi‐based GM plants. ACTA ACUST UNITED AC 2017. [PMCID: PMC7163844 DOI: 10.2903/sp.efsa.2017.en-1246] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jan Paces
- Institute of Molecular Genetics of the Academy of Sciences of the Czech Republic (IMG)
| | | | | | - Petr Svoboda
- Institute of Molecular Genetics of the Academy of Sciences of the Czech Republic (IMG)
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137
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Abstract
The plant vascular system plays a central role in coordinating physiological and developmental events through delivery of both essential nutrients and long-distance signaling agents. The enucleate phloem sieve tube system of the angiosperms contains a broad spectrum of RNA species. Grafting and transcriptomics studies have indicated that several thousand mRNAs move long distances from source organs to meristematic sink tissues. Ribonucleoprotein complexes play a pivotal role as stable RNA-delivery systems for systemic translocation of cargo RNA. In this review, we assess recent progress in the characterization of phloem and plasmodesmal transport as an integrated local and systemic communication network. We discuss the roles of phloem-mobile small RNAs in epigenetic events, including meristem development and genome stability, and the delivery of mRNAs to specific tissues in response to environmental inputs. A large body of evidence now supports a model in which phloem-mobile RNAs act as critical components of gene regulatory networks involved in plant growth, defense, and crop yield at the whole-plant level.
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Affiliation(s)
- Byung-Kook Ham
- Department of Plant Biology, College of Biological Sciences, University of California, Davis, California 95616; ,
| | - William J Lucas
- Department of Plant Biology, College of Biological Sciences, University of California, Davis, California 95616; ,
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138
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Sosa-Valencia G, Palomar M, Covarrubias AA, Reyes JL. The legume miR1514a modulates a NAC transcription factor transcript to trigger phasiRNA formation in response to drought. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:2013-2026. [PMID: 28338719 PMCID: PMC5429018 DOI: 10.1093/jxb/erw380] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Recent studies have identified microRNAs as post-transcriptional regulators involved in stress responses. miR1514a is a legume microRNA that is induced in response to drought stress in Phaseolus vulgaris (common bean) and shows differential accumulation levels in roots during water deficit in two cultivars with different drought tolerance phenotypes. A recent degradome analysis revealed that miR1514a targets the transcripts of two NAC transcription factors (TFs), Phvul.010g121000 and Phvul.010g120700. Furthermore, expression studies and small RNA-seq data indicate that only Phvul.010g120700 generates phasiRNAs, which also accumulate under water deficit conditions. To confirm these results, we over-expressed miR1514a in transgenic hairy roots, and observed a reduced accumulation of Phvul.010g120700 and an increase in NAC-derived phasiRNAs; inhibition of miR1514a activity resulted in the opposite effect. Moreover, we determined that a NAC-derived phasiRNA associates with ARGONAUTE 1 (AGO1), suggesting that it is functional. In addition, a transcriptome analysis of transgenic hairy roots with reduced miR1514a levels revealed several differentially expressed transcripts, mainly involved in metabolism and stress responses, suggesting they are regulated by the NAC TF and/or by phasiRNAs. This work therefore demonstrates the participation of miR1514 in the regulation of a NAC transcription factor transcript through phasiRNA production during the plant response to water deficit.
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Affiliation(s)
- Guadalupe Sosa-Valencia
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México,Av. Universidad 2001, Col. Chamilpa, C.P. 62210, Cuernavaca Mor., Mexico
| | - Miguel Palomar
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México,Av. Universidad 2001, Col. Chamilpa, C.P. 62210, Cuernavaca Mor., Mexico
| | - Alejandra A Covarrubias
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México,Av. Universidad 2001, Col. Chamilpa, C.P. 62210, Cuernavaca Mor., Mexico
| | - José L Reyes
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México,Av. Universidad 2001, Col. Chamilpa, C.P. 62210, Cuernavaca Mor., Mexico
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Secco D, Bouain N, Rouached A, Prom-U-Thai C, Hanin M, Pandey AK, Rouached H. Phosphate, phytate and phytases in plants: from fundamental knowledge gained in Arabidopsis to potential biotechnological applications in wheat. Crit Rev Biotechnol 2017; 37:898-910. [PMID: 28076998 DOI: 10.1080/07388551.2016.1268089] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Phosphorus (P) is an essential macronutrient for all living organisms. In plants, P is taken up from the rhizosphere by the roots mainly as inorganic phosphate (Pi), which is required in large and sufficient quantities to maximize crop yields. In today's agricultural society, crop yield is mostly ensured by the excessive use of Pi fertilizers, a costly practice neither eco-friendly or sustainable. Therefore, generating plants with improved P use efficiency (PUE) is of major interest. Among the various strategies employed to date, attempts to engineer genetically modified crops with improved capacity to utilize phytate (PA), the largest soil P form and unfortunately not taken up by plants, remains a key challenge. To meet these challenges, we need a better understanding of the mechanisms regulating Pi sensing, signaling, transport and storage in plants. In this review, we summarize the current knowledge on these aspects, which are mainly gained from investigations conducted in Arabidopsis thaliana, and we extended it to those available on an economically important crop, wheat. Strategies to enhance the PA use, through the use of bacterial or fungal phytases and other attempts of reducing seed PA levels, are also discussed. We critically review these data in terms of their potential for use as a technology for genetic manipulation of PUE in wheat, which would be both economically and environmentally beneficial.
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Affiliation(s)
- David Secco
- a Biochimie et Physiologie Moléculaire des Plantes , CNRS, INRA, Montpellier SupAgro, UM , Montpellier , France
| | - Nadia Bouain
- a Biochimie et Physiologie Moléculaire des Plantes , CNRS, INRA, Montpellier SupAgro, UM , Montpellier , France
| | - Aida Rouached
- a Biochimie et Physiologie Moléculaire des Plantes , CNRS, INRA, Montpellier SupAgro, UM , Montpellier , France
| | - Chanakan Prom-U-Thai
- b Agronomy Division, Department of Plant and Soil Sciences, Faculty of Agriculture , Chiang Mai University , Chiang Mai , Thailand
| | - Moez Hanin
- c Laboratoire de Biotechnologie et Amélioration des Plantes , Centre de Biotechnologie de Sfax , Sfax , Tunisie
| | - Ajay K Pandey
- d Department of Biotechnology, C-127 , National Agri-Food Biotechnology Institute , Punjab , India
| | - Hatem Rouached
- a Biochimie et Physiologie Moléculaire des Plantes , CNRS, INRA, Montpellier SupAgro, UM , Montpellier , France.,b Agronomy Division, Department of Plant and Soil Sciences, Faculty of Agriculture , Chiang Mai University , Chiang Mai , Thailand.,c Laboratoire de Biotechnologie et Amélioration des Plantes , Centre de Biotechnologie de Sfax , Sfax , Tunisie
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140
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Tariq A, Pan K, Olatunji OA, Graciano C, Li Z, Sun F, Sun X, Song D, Chen W, Zhang A, Wu X, Zhang L, Mingrui D, Xiong Q, Liu C. Phosphorous Application Improves Drought Tolerance of Phoebe zhennan. FRONTIERS IN PLANT SCIENCE 2017; 8:1561. [PMID: 28955356 PMCID: PMC5601402 DOI: 10.3389/fpls.2017.01561] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 08/28/2017] [Indexed: 05/05/2023]
Abstract
Phoebe zhennan (Gold Phoebe) is a threatened tree species in China and a valuable and important source of wood and bioactive compounds used in medicine. Apart from anthropogenic disturbances, several biotic constraints currently restrict its growth and development. However, little attention has been given to building adaptive strategies for its conservation by examining its morphological and physio-biochemical responses to drought stress, and the role of fertilizers on these responses. A randomized experimental design was used to investigate the effects of two levels of irrigation (well-watered and drought-stressed) and phosphorous (P) fertilization treatment (with and without P) to assess the morphological and physio-biochemical responses of P. zhennan seedlings to drought stress. In addition, we evaluated whether P application could mitigate the negative impacts of drought on plant growth and metabolism. Drought stress had a significant negative effect on the growth and metabolic processes of P. zhennan. Despite this, reduced leaf area, limited stomatal conductance, reduced transpiration rate, increased water use efficiency, enhanced antioxidant enzymes activities, and osmolytes accumulation suggested that the species has good adaptive strategies for tolerating drought stress. Application of P had a significant positive effect on root biomass, signifying its improved water extracting capacity from the soil. Moreover, P fertilization significantly increased leaf relative water content, net photosynthetic rate, and maximal quantum efficiency of PSII under drought stress conditions. This may be attributable to several factors, such as enhanced root biomass, decreased malondialdehyde content, and the up-regulation of chloroplast pigments, osmolytes, and nitrogenous compounds. However, P application had only a slight or negligible effect on the growth and metabolism of well-watered plants. In conclusion, P. zhennan has a strong capability for drought resistance, while P application facilitates and improves drought tolerance mostly through physio-biochemical adjustments, regardless of water availability. It is imperative to explore the underlying metabolic mechanisms and effects of different levels of P fertilization on P. zhennan under drought conditions in order to design appropriate conservation and management strategies for this species, which is at risk of extinction.
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Affiliation(s)
- Akash Tariq
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
- International College, University of Chinese Academy of SciencesBeijing, China
| | - Kaiwen Pan
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
- *Correspondence: Kaiwen Pan,
| | - Olusanya A. Olatunji
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
- International College, University of Chinese Academy of SciencesBeijing, China
| | - Corina Graciano
- Instituto de Fisiología Vegetal, Consejo Nacional de Investigaciones Científicas y Técnicas – Universidad Nacional de La PlataBuenos Aires, Argentina
| | - Zilong Li
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
| | - Feng Sun
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
| | - Xiaoming Sun
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
| | - Dagang Song
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
| | - Wenkai Chen
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
| | - Aiping Zhang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
| | - Xiaogang Wu
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
| | - Lin Zhang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
| | - Deng Mingrui
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
| | - Qinli Xiong
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
| | - Chenggang Liu
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of SciencesChengdu, China
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141
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Kumar S, Verma S, Trivedi PK. Involvement of Small RNAs in Phosphorus and Sulfur Sensing, Signaling and Stress: Current Update. FRONTIERS IN PLANT SCIENCE 2017; 8:285. [PMID: 28344582 PMCID: PMC5344913 DOI: 10.3389/fpls.2017.00285] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Accepted: 02/16/2017] [Indexed: 05/14/2023]
Abstract
Plants require several essential mineral nutrients for their growth and development. These nutrients are required to maintain physiological processes and structural integrity in plants. The root architecture has evolved to absorb nutrients from soil and transport them to other parts of the plant. Nutrient deficiency affects several physiological and biological processes in plants and leads to reduction in crop productivity and yield. To compensate this adversity, plants have developed adaptive mechanisms to enhance the acquisition, conservation, and mobilization of these nutrients under deficient or adverse conditions. In addition, plants have evolved an intricate nexus of complex signaling cascades, which help in nutrient sensing and uptake as well as to maintain nutrient homeostasis. In recent years, small non-coding RNAs such as micro RNAs (miRNAs) and endogenous small interfering RNAs have emerged as important component in regulating plant stress responses. A set of these small RNAs (sRNAs) have been implicated in regulating various processes involved in nutrient uptake, assimilation, and deficiency. In response to phosphorus (P) and sulphur (S) deficiencies, role of sRNAs, miR395 and miR399, have been identified to be instrumental; however, many more miRNAs might be involved in regulating the plant response to these nutrient stresses. These sRNAs modulate expression of target genes in response to P and S deficiencies and regulate their uptake and utilization for proper growth and development of the plant. This review summarizes the current understanding of uptake, sensing, and signaling of P and S and highlights the regulatory role of sRNAs in adaptive responses to these nutrient stresses in plants.
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Affiliation(s)
- Smita Kumar
- Council of Scientific and Industrial Research – National Botanical Research InstituteLucknow, India
- Centre of Bio-Medical ResearchSanjay Gandhi Post-Graduate Institute of Medical Sciences Lucknow, India
- *Correspondence: Prabodh K. Trivedi, ; Smita Kumar,
| | - Saurabh Verma
- Council of Scientific and Industrial Research – National Botanical Research InstituteLucknow, India
- Department of Biotechnology, Babasaheb Bhimrao Ambedkar UniversityLucknow, India
| | - Prabodh K. Trivedi
- Council of Scientific and Industrial Research – National Botanical Research InstituteLucknow, India
- *Correspondence: Prabodh K. Trivedi, ; Smita Kumar,
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142
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Ying Y, Yue W, Wang S, Li S, Wang M, Zhao Y, Wang C, Mao C, Whelan J, Shou H. Two h-Type Thioredoxins Interact with the E2 Ubiquitin Conjugase PHO2 to Fine-Tune Phosphate Homeostasis in Rice. PLANT PHYSIOLOGY 2017; 173:812-824. [PMID: 27895204 PMCID: PMC5210762 DOI: 10.1104/pp.16.01639] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 11/27/2016] [Indexed: 05/02/2023]
Abstract
Phosphate overaccumulator2 (PHO2) encodes a ubiquitin-conjugating E2 enzyme that is a major negative regulator of the inorganic phosphate (Pi)-starvation response-signaling pathway. A yeast two-hybrid (Y2H) screen in rice (Oryza sativa; Os) using OsPHO2 as bait revealed an interaction between OsPHO2 and two h-type thioredoxins, OsTrxh1 and OsTrxh4. These interactions were confirmed in vivo using bimolecular fluorescence complementation (BiFC) of OsPHO2 and OsTrxh1/h4 in rice protoplasts and by in vitro pull-down assays with 6His-tagged OsTrxh1/h4 and GST-tagged OsPHO2. Y2H assays revealed that amino acid Cys-445 of OsPHO2 and an N-terminal Cys in the "WCGPC" motif of Trxhs were required for the interaction. Split-ubiquitin Y2H analyses and BiFC assays in rice protoplasts confirmed the interaction of OsPHO2 with PHOSPHATE TRANSPORTER TRAFFIC FACILITATOR1 (OsPHF1), and PHOSPHATE1;2 (OsPHO1;2) in the endoplasmic reticulum and Golgi membrane system, where OsPHO2 mediates the degradation of OsPHF1 in both tobacco (Nicotiana benthamiana) leaves and rice seedlings. Characterization of rice pho2 complemented lines, transformed with an endogenous genomic OsPHO2 or OsPHO2C445S (a constitutively reduced form) fragment, indicated that OsPHO2C445S restored Pi concentration in rice to statistically significant lower levels compared to native OsPHO2 Moreover, the suppression of OsTrxh1 (knockdown and knockout) resulted in slightly higher Pi concentration than that of wild-type Nipponbare in leaves. These results demonstrate that OsPHO2 is under redox control by thioredoxins, which fine-tune its activity and link Pi homeostasis with redox balance in rice.
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Affiliation(s)
- Yinghui Ying
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (Y.Y., W.Y., S.W., S.L., M.W., Y.Z., C.W., C.M., H.S.); and
- Australian Research Council Centre of Excellence in Plant Energy Biology, Department of Animal, Plant, and Soil Science, School of Life Science, La Trobe University, Bundoora, Victoria 3086, Australia (J.W.)
| | - Wenhao Yue
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (Y.Y., W.Y., S.W., S.L., M.W., Y.Z., C.W., C.M., H.S.); and
- Australian Research Council Centre of Excellence in Plant Energy Biology, Department of Animal, Plant, and Soil Science, School of Life Science, La Trobe University, Bundoora, Victoria 3086, Australia (J.W.)
| | - Shoudong Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (Y.Y., W.Y., S.W., S.L., M.W., Y.Z., C.W., C.M., H.S.); and
- Australian Research Council Centre of Excellence in Plant Energy Biology, Department of Animal, Plant, and Soil Science, School of Life Science, La Trobe University, Bundoora, Victoria 3086, Australia (J.W.)
| | - Shuai Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (Y.Y., W.Y., S.W., S.L., M.W., Y.Z., C.W., C.M., H.S.); and
- Australian Research Council Centre of Excellence in Plant Energy Biology, Department of Animal, Plant, and Soil Science, School of Life Science, La Trobe University, Bundoora, Victoria 3086, Australia (J.W.)
| | - Min Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (Y.Y., W.Y., S.W., S.L., M.W., Y.Z., C.W., C.M., H.S.); and
- Australian Research Council Centre of Excellence in Plant Energy Biology, Department of Animal, Plant, and Soil Science, School of Life Science, La Trobe University, Bundoora, Victoria 3086, Australia (J.W.)
| | - Yang Zhao
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (Y.Y., W.Y., S.W., S.L., M.W., Y.Z., C.W., C.M., H.S.); and
- Australian Research Council Centre of Excellence in Plant Energy Biology, Department of Animal, Plant, and Soil Science, School of Life Science, La Trobe University, Bundoora, Victoria 3086, Australia (J.W.)
| | - Chuang Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (Y.Y., W.Y., S.W., S.L., M.W., Y.Z., C.W., C.M., H.S.); and
- Australian Research Council Centre of Excellence in Plant Energy Biology, Department of Animal, Plant, and Soil Science, School of Life Science, La Trobe University, Bundoora, Victoria 3086, Australia (J.W.)
| | - Chuanzao Mao
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (Y.Y., W.Y., S.W., S.L., M.W., Y.Z., C.W., C.M., H.S.); and
- Australian Research Council Centre of Excellence in Plant Energy Biology, Department of Animal, Plant, and Soil Science, School of Life Science, La Trobe University, Bundoora, Victoria 3086, Australia (J.W.)
| | - James Whelan
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (Y.Y., W.Y., S.W., S.L., M.W., Y.Z., C.W., C.M., H.S.); and
- Australian Research Council Centre of Excellence in Plant Energy Biology, Department of Animal, Plant, and Soil Science, School of Life Science, La Trobe University, Bundoora, Victoria 3086, Australia (J.W.)
| | - Huixia Shou
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China (Y.Y., W.Y., S.W., S.L., M.W., Y.Z., C.W., C.M., H.S.); and
- Australian Research Council Centre of Excellence in Plant Energy Biology, Department of Animal, Plant, and Soil Science, School of Life Science, La Trobe University, Bundoora, Victoria 3086, Australia (J.W.)
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143
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Roldan M, Islam A, Dinh PTY, Leung S, McManus MT. Phosphate availability regulates ethylene biosynthesis gene expression and protein accumulation in white clover (Trifolium repens L.) roots. Biosci Rep 2016; 36:e00411. [PMID: 27737923 PMCID: PMC5293567 DOI: 10.1042/bsr20160148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 10/11/2016] [Accepted: 10/13/2016] [Indexed: 01/23/2023] Open
Abstract
The expression and accumulation of members of the 1-aminocyclopropane-1-carboxylate (ACC) synthase (ACS) and ACC oxidase (ACO) gene families was examined in white clover roots grown in either Pi (phosphate) sufficient or Pi-deprived defined media. The accumulation of one ACO isoform, TR-ACO1, was positively influenced after only 1 h of exposure to low Pi, and this was maintained over a 7-day time-course. Up-regulation of TR-ACS1, TR-ACS2 and TR-ACS3 transcript abundance was also observed within 1 h of exposure to low Pi in different tissue regions of the roots, followed by a second increase in abundance of TR-ACS2 after 5-7 days of exposure. An increase in transcript abundance of TR-ACO1 and TR-ACO3, but not TR-ACO2, was observed after 1 h of exposure to low Pi, with a second increase in TR-ACO1 transcripts occurring after 2-5 days. These initial increases of the TR-ACS and TR-ACO transcript abundance occurred before the induction of Trifolium repens PHOSPHATE TRANSPORTER 1 (TR-PT1), and the addition of sodium phosphite did not up-regulate TR-ACS1 expression over 24 h. In situ hybridization revealed some overlap of TR-ACO mRNA accumulation, with TR-ACO1 and TR-ACO2 in the root tip regions, and TR-ACO1 and TR-ACO3 mRNA predominantly in the lateral root primordia. TR-ACO1p-driven GFP expression showed that activation of the TR-ACO1 promoter was initiated within 24 h of exposure to low Pi (as determined by GFP protein accumulation). These results suggest that the regulation of ethylene biosynthesis in white clover roots is biphasic in response to low Pi supply.
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Affiliation(s)
- Marissa Roldan
- Institute of Fundamental Sciences, Massey University, Private Bag 11222, Palmerston North 4474, New Zealand
| | - Afsana Islam
- Institute of Fundamental Sciences, Massey University, Private Bag 11222, Palmerston North 4474, New Zealand
| | - Phuong T Y Dinh
- Institute of Fundamental Sciences, Massey University, Private Bag 11222, Palmerston North 4474, New Zealand
| | - Susanna Leung
- Institute of Fundamental Sciences, Massey University, Private Bag 11222, Palmerston North 4474, New Zealand
| | - Michael T McManus
- Institute of Fundamental Sciences, Massey University, Private Bag 11222, Palmerston North 4474, New Zealand
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144
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Qiu L, Li Q, Zhang J, Chen Y, Lin X, Sun C, Wang W, Liu H, Zhang B. Migration of endophytic diazotroph Azorhizobium caulinodans ORS571 inside wheat (Triticum aestivum L) and its effect on microRNAs. Funct Integr Genomics 2016; 17:311-319. [PMID: 27858182 DOI: 10.1007/s10142-016-0534-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 10/30/2016] [Accepted: 11/01/2016] [Indexed: 11/30/2022]
Abstract
Azorhizobium caulinodans ORS571, a novel rhizobium, forms endosymbionts with its nature host Sesbania rostrata, a semi-aquatic leguminous tree. Recent studies showed that A. caulinodans ORS571, as endophytic rhizobium, disseminated and colonized inside of cereal plants. However, how this rhizobium infects monocot plants and the regulatory mechanism remains unknown. MicroRNAs (miRNAs) are small, endogenous RNAs that regulate gene expression at the post-transcriptional levels. In this study, we employed laser scanning confocal microscope to monitor the pathway that rhizobium invade wheat; we also investigated the potential role of miRNAs during A. caulinodans ORS571 infecting wheat. Our results showed that gfp-labeled A. caulinodans ORS571 infected wheat root hairs and emerged lateral roots, then disseminated and colonized within roots and migrated to other plant tissues, such as stems and leaves. Endophytic rhizobium induced the aberrant expression of miRNAs in wheat with a tissue- and time-dependent manner with a peak at 12-24 h after rhizobium infection. Some miRNAs, such as miR167 and miR393 responded more in roots than that in shoots. In contrast, miR171 responded higher in shoots than that in roots. These results suggested that miRNAs could be responsive to A. caulinodans ORS571 infection and played important role in plant growth, nutrient metabolisms, and wheat-rhizobium interactions.
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Affiliation(s)
- Li Qiu
- College of Veterinary Medicine, Northwest A & F University, Yangling, 712100, Shaanxi, China
| | - Qiang Li
- College of Life Sciences, Northwest A & F University, Yangling, 712100, Shaanxi, China
| | - Junbiao Zhang
- College of Life Sciences, Northwest A & F University, Yangling, 712100, Shaanxi, China
| | - Yongchao Chen
- College of Life Sciences, Northwest A & F University, Yangling, 712100, Shaanxi, China
| | - Xiaojun Lin
- College of Life Sciences, Northwest A & F University, Yangling, 712100, Shaanxi, China
| | - Chao Sun
- College of Life Sciences, Northwest A & F University, Yangling, 712100, Shaanxi, China
| | - Weiling Wang
- College of Life Sciences, Northwest A & F University, Yangling, 712100, Shaanxi, China
| | - Huawei Liu
- College of Life Sciences, Northwest A & F University, Yangling, 712100, Shaanxi, China.
| | - Baohong Zhang
- Department of Biology, East Carolina University, Greenville, NC, 27858, USA.
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145
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Li Z, Zhang X, Liu X, Zhao Y, Wang B, Zhang J. miRNA alterations are important mechanism in maize adaptations to low-phosphate environments. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2016; 252:103-117. [PMID: 27717445 DOI: 10.1016/j.plantsci.2016.07.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 07/13/2016] [Accepted: 07/16/2016] [Indexed: 05/26/2023]
Abstract
Maize is a globally important crop, and a low phosphate (LP) supply frequently limits maize yields in many areas. microRNAs (miRNAs) play important roles in plant development and environmental adaptation. In this study, spatio-temporal miRNA transcript profiling and some of the target genes in the roots and leaves of the maize inbred line Q319 were analyzed in response to LP. Complex small RNA populations were detected after LP culture, and they displayed different patterns in the roots and leaves. Differentially expressed miRNAs can be grouped into 'early' miRNAs, which respond rapidly and are often non-specific to phosphate deficiency, and 'late' miRNAs, which alter the morphology, physiology or metabolism of plants upon prolonged phosphate deficiency. miR827 and miR399-mediated posttranscriptional pathway responses to phosphate availability were conserved and species-specific in maize. Abiotic stress-related miRNAs were engaged in interactions with different signaling and/or metabolic pathways. Auxin-related miRNAs and their targets' expression may be involved in root architecture modification and upland growth retardation in maize when subjected to LP. The changes that were found in the expression of miRNAs and their target genes suggested that miRNA regulation/alterations are pivotal mechanisms in maize adaptations to LP environments. A complex regulatory mechanism involving miRNAs in response to the LP environment is present in maize.
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Affiliation(s)
- Zhaoxia Li
- School of Life Science, Shandong University, 27 Shanda South Road, Jinan, Shandong 250100 PR China.
| | - Xinrui Zhang
- School of Life Science, Shandong University, 27 Shanda South Road, Jinan, Shandong 250100 PR China.
| | - Xiuxia Liu
- School of Life Science, Shandong University, 27 Shanda South Road, Jinan, Shandong 250100 PR China.
| | - Yajie Zhao
- School of Life Science, Shandong University, 27 Shanda South Road, Jinan, Shandong 250100 PR China.
| | - Baomei Wang
- School of Life Science, Shandong University, 27 Shanda South Road, Jinan, Shandong 250100 PR China.
| | - Juren Zhang
- School of Life Science, Shandong University, 27 Shanda South Road, Jinan, Shandong 250100 PR China.
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146
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Ouyang X, Hong X, Zhao X, Zhang W, He X, Ma W, Teng W, Tong Y. Knock out of the PHOSPHATE 2 Gene TaPHO2-A1 Improves Phosphorus Uptake and Grain Yield under Low Phosphorus Conditions in Common Wheat. Sci Rep 2016; 6:29850. [PMID: 27416927 PMCID: PMC4945926 DOI: 10.1038/srep29850] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 06/24/2016] [Indexed: 11/24/2022] Open
Abstract
MiR399 and its target PHOSPHATE2 (PHO2) play pivotal roles in phosphate signaling in plants. Loss of function mutation in PHO2 leads to excessive Pi accumulation in shoots and growth retardation in diploid plants like Arabidopsis thaliana and rice (Oryza sativa). Here we isolated three PHO2 homologous genes TaPHO2-A1, -B1 and -D1 from hexaploid wheat (Triticum aestivum). These TaPHO2 genes all contained miR399-binding sites and were able to be degraded by tae-miR399. TaPHO2-D1 was expressed much more abundantly than TaPHO2-A1 and -B1. The ion beam-induced deletion mutants were used to analyze the effects of TaPHO2s on phosphorus uptake and plant growth. The tapho2-a1, tapho2-b1 and tapho2-d1 mutants all had significant higher leaf Pi concentrations than did the wild type, with tapho2-d1 having the strongest effect, and tapho2-b1 the weakest. Two consecutive field experiments showed that knocking out TaPHO2-D1 reduced plant height and grain yield under both low and high phosphorus conditions. However, knocking out TaPHO2-A1 significantly increased phosphorus uptake and grain yield under low phosphorus conditions, with no adverse effect on grain yield under high phosphorus conditions. Our results indicated that TaPHO2s involved in phosphorus uptake and translocation, and molecular engineering TaPHO2 shows potential in improving wheat yield with less phosphorus fertilizer.
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Affiliation(s)
- Xiang Ouyang
- State Key Laboratory for Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Xia Hong
- State Key Laboratory for Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Sciences, Chinese Academy of Sciences, Beijing 100101, China
- Taizhou Academy of Agricultural Sciences, Linhai, Zhejiang 317000, China
| | - Xueqiang Zhao
- State Key Laboratory for Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Wei Zhang
- State Key Laboratory for Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Xue He
- State Key Laboratory for Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Wenying Ma
- State Key Laboratory for Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Wan Teng
- State Key Laboratory for Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Yiping Tong
- State Key Laboratory for Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Sciences, Chinese Academy of Sciences, Beijing 100101, China
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147
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Zhang H, Huang L, Hong Y, Song F. BOTRYTIS-INDUCED KINASE1, a plasma membrane-localized receptor-like protein kinase, is a negative regulator of phosphate homeostasis in Arabidopsis thaliana. BMC PLANT BIOLOGY 2016; 16:152. [PMID: 27389008 PMCID: PMC4936243 DOI: 10.1186/s12870-016-0841-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 06/28/2016] [Indexed: 05/21/2023]
Abstract
BACKGROUND Plants have evolved complex coordinated regulatory networks to cope with deficiency of phosphate (Pi) in their growth environment; however, the detailed molecular mechanisms that regulate Pi sensing and signaling pathways are not fully understood yet. We report here that the involvement of Arabidopsis BIK1, a plasma membrane-localized receptor-like protein kinase that plays critical role in immunity, in Pi starvation response. RESULTS qRT-PCR analysis revealed that expression of BIK1 was induced by Pi starvation and GUS staining indicated that the BIK1 promoter activity was detected in root, stem and leaf tissues of plants grown in Pi starvation condition, demonstrating that BIK1 is responsive to Pi starvation stress. The bik1 plants accumulated higher Pi content in root and leaf tissues and exhibited altered root architecture such as shorter primary roots, longer and more root hairs and lateral roots, as compared with those in the wild type plants, when grown under Pi sufficient and deficient conditions. Increased anthocyanin content and acid phosphatase activity, reduced accumulation of reactive oxygen species and downregulated expression of Pi starvation-induced genes including PHR1, WRKY75, AT4, PHT1;2 and PHT1;4 were observed in bik1 plants grown under Pi deficient condition. Furthermore, the expression of PHO2 was downregulated while the expression of miRNA399a and miRNA399d, which target to PHO2, was upregulated in bik1 plants, compared to the wild type plants, when grown under Pi deficient condition. CONCLUSION Our results demonstrate that BIK1 is a Pi starvation-responsive gene that functions as a negative regulator of Pi homeostasis in Arabidopsis.
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Affiliation(s)
- Huijuan Zhang
- />College of Life Science, Taizhou University, Taizhou, Zhejiang 318001 People’s Republic of China
- />National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058 People’s Republic of China
| | - Lei Huang
- />National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058 People’s Republic of China
| | - Yongbo Hong
- />National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058 People’s Republic of China
| | - Fengming Song
- />National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058 People’s Republic of China
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148
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Madmon O, Mazuz M, Kumari P, Dam A, Ion A, Mayzlish-Gati E, Belausov E, Wininger S, Abu-Abied M, McErlean CSP, Bromhead LJ, Perl-Treves R, Prandi C, Kapulnik Y, Koltai H. Expression of MAX2 under SCARECROW promoter enhances the strigolactone/MAX2 dependent response of Arabidopsis roots to low-phosphate conditions. PLANTA 2016; 243:1419-1427. [PMID: 26919985 DOI: 10.1007/s00425-016-2477-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 01/22/2016] [Indexed: 06/05/2023]
Abstract
MAX2/strigolactone signaling in the endodermis and/or quiescent center of the root is partially sufficient to exert changes in F-actin density and cellular trafficking in the root epidermis, and alter gene expression during plant response to low Pi conditions. Strigolactones (SLs) are a new group of plant hormones that regulate different developmental processes in the plant via MAX2, an F-box protein that interacts with their receptor. SLs and MAX2 are necessary for the marked increase in root-hair (RH) density in seedlings under conditions of phosphate (Pi) deprivation. This marked elevation was associated with an active reduction in actin-filament density and endosomal movement in root epidermal cells. Also, expression of MAX2 under the SCARECROW (SCR) promoter was sufficient to confer SL sensitivity in roots, suggesting that SL signaling pathways act through a root-specific, yet non-cell-autonomous regulatory mode of action. Here we show evidence for a non-cell autonomous signaling of SL/MAX2, originating from the root endodermis, and necessary for seedling response to conditions of Pi deprivation. SCR-derived expression of MAX2 in max2-1 mutant background promoted the root low Pi response, whereas supplementation of the synthetic SL GR24 to these SCR:MAX2 expressing lines further enhanced this response. Moreover, the SCR:MAX2 expression led to changes in actin density and endosome movement in epidermal cells and in TIR1 and PHO2 gene expression. These results demonstrate that MAX2 signaling in the endodermis and/or quiescent center is partially sufficient to exert changes in F-actin density and cellular trafficking in the epidermis, and alter gene expression under low Pi conditions.
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Affiliation(s)
- Ortal Madmon
- Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, 50250, Bet Dagan, Israel
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, 52900, Ramat-Gan, Israel
| | - Moran Mazuz
- Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, 50250, Bet Dagan, Israel
| | - Puja Kumari
- Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, 50250, Bet Dagan, Israel
| | - Anandamoy Dam
- Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, 50250, Bet Dagan, Israel
| | - Aurel Ion
- Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, 50250, Bet Dagan, Israel
| | - Einav Mayzlish-Gati
- Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, 50250, Bet Dagan, Israel
| | - Eduard Belausov
- Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, 50250, Bet Dagan, Israel
| | - Smadar Wininger
- Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, 50250, Bet Dagan, Israel
| | - Mohamad Abu-Abied
- Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, 50250, Bet Dagan, Israel
| | | | - Liam J Bromhead
- School of Chemistry, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Rafael Perl-Treves
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, 52900, Ramat-Gan, Israel
| | - Cristina Prandi
- Dipartimento di Chimica, Turin University, 10125, Turin, Italy
| | - Yoram Kapulnik
- Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, 50250, Bet Dagan, Israel
| | - Hinanit Koltai
- Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, 50250, Bet Dagan, Israel.
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149
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Khan GA, Vogiatzaki E, Glauser G, Poirier Y. Phosphate Deficiency Induces the Jasmonate Pathway and Enhances Resistance to Insect Herbivory. PLANT PHYSIOLOGY 2016; 171:632-44. [PMID: 27016448 PMCID: PMC4854718 DOI: 10.1104/pp.16.00278] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 03/24/2016] [Indexed: 05/19/2023]
Abstract
During their life cycle, plants are typically confronted by simultaneous biotic and abiotic stresses. Low inorganic phosphate (Pi) is one of the most common nutrient deficiencies limiting plant growth in natural and agricultural ecosystems, while insect herbivory accounts for major losses in plant productivity and impacts ecological and evolutionary changes in plant populations. Here, we report that plants experiencing Pi deficiency induce the jasmonic acid (JA) pathway and enhance their defense against insect herbivory. Pi-deficient Arabidopsis (Arabidopsis thaliana) showed enhanced synthesis of JA and the bioactive conjugate JA-isoleucine, as well as activation of the JA signaling pathway, in both shoots and roots of wild-type plants and in shoots of the Pi-deficient mutant pho1 The kinetics of the induction of the JA signaling pathway by Pi deficiency was influenced by PHOSPHATE STARVATION RESPONSE1, the main transcription factor regulating the expression of Pi starvation-induced genes. Phenotypes of the pho1 mutant typically associated with Pi deficiency, such as high shoot anthocyanin levels and poor shoot growth, were significantly attenuated by blocking the JA biosynthesis or signaling pathway. Wounded pho1 leaves hyperaccumulated JA/JA-isoleucine in comparison with the wild type. The pho1 mutant also showed an increased resistance against the generalist herbivore Spodoptera littoralis that was attenuated in JA biosynthesis and signaling mutants. Pi deficiency also triggered increased resistance to S. littoralis in wild-type Arabidopsis as well as tomato (Solanum lycopersicum) and Nicotiana benthamiana, revealing that the link between Pi deficiency and enhanced herbivory resistance is conserved in a diversity of plants, including crops.
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Affiliation(s)
- Ghazanfar Abbas Khan
- Departof Lausanne, CH-1015 Lausanne, Switzerland (G.A.K., E.V., Y.P.); andNeuchâtel Platform of Analytical Chemistry, University of Neuchâtel, CH-2009 Neuchâtel, Switzerland (G.G.)
| | - Evangelia Vogiatzaki
- Departof Lausanne, CH-1015 Lausanne, Switzerland (G.A.K., E.V., Y.P.); andNeuchâtel Platform of Analytical Chemistry, University of Neuchâtel, CH-2009 Neuchâtel, Switzerland (G.G.)
| | - Gaétan Glauser
- Departof Lausanne, CH-1015 Lausanne, Switzerland (G.A.K., E.V., Y.P.); andNeuchâtel Platform of Analytical Chemistry, University of Neuchâtel, CH-2009 Neuchâtel, Switzerland (G.G.)
| | - Yves Poirier
- Departof Lausanne, CH-1015 Lausanne, Switzerland (G.A.K., E.V., Y.P.); andNeuchâtel Platform of Analytical Chemistry, University of Neuchâtel, CH-2009 Neuchâtel, Switzerland (G.G.)
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150
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Li C, Zhang B. MicroRNAs in Control of Plant Development. J Cell Physiol 2016; 231:303-13. [PMID: 26248304 DOI: 10.1002/jcp.25125] [Citation(s) in RCA: 185] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 08/04/2015] [Indexed: 12/19/2022]
Abstract
In the long evolutionary history, plant has evolved elaborate regulatory network to control functional gene expression for surviving and thriving, such as transcription factor-regulated transcriptional programming. However, plenty of evidences from the past decade studies demonstrate that the 21-24 nucleotides small RNA molecules, majorly microRNAs (miRNAs) play dominant roles in post-transcriptional gene regulation through base pairing with their complementary mRNA targets, especially prefer to target transcription factors in plants. Here, we review current progresses on miRNA-controlled plant development, from miRNA biogenesis dysregulation-caused pleiotropic developmental defects to specific developmental processes, such as SAM regulation, leaf and root system regulation, and plant floral transition. We also summarize some miRNAs that are experimentally proved to greatly affect crop plant productivity and quality. In addition, recent reports show that a single miRNA usually displays multiple regulatory roles, such as organ development, phase transition, and stresses responses. Thus, we infer that miRNA may act as a node molecule to coordinate the balance between plant development and environmental clues, which may shed the light on finding key regulator or regulatory pathway for uncovering the mysterious molecular network.
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Affiliation(s)
| | - Baohong Zhang
- Department of Biology, East Carolina University, Greenville, 27858, North Carolina
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