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Perera I, Fukushima A, Akabane T, Horiguchi G, Seneweera S, Hirotsu N. Expression regulation of myo-inositol 3-phosphate synthase 1 (INO1) in determination of phytic acid accumulation in rice grain. Sci Rep 2019; 9:14866. [PMID: 31619750 PMCID: PMC6795888 DOI: 10.1038/s41598-019-51485-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 10/02/2019] [Indexed: 01/07/2023] Open
Abstract
Phytic acid (PA) is the primary phosphorus (P) storage compound in the seeds of cereals and legumes. Low PA crops, which are considered an effective way to improve grain nutrient availability and combat environmental issues relating to seed P have been developed using mutational and reverse genetics approaches. Here, we identify molecular mechanism regulating PA content among natural rice variants. First, we performed genome-wide association (GWA) mapping of world rice core collection (WRC) accessions to understand the genetic determinants underlying PA trait in rice. Further, a comparative study was undertaken to identify the differences in PA accumulation, protein profiles, and gene expression in low (WRC 5) and high PA (WRC 6) accessions. GWA results identified myo-inositol 3-phosphate synthase 1 (INO1) as being closely localized to a significant single nucleotide polymorphism. We found high rates of PA accumulation 10 days after flowering, and our results indicate that INO1 expression was significantly higher in WRC 6 than in WRC 5. Seed proteome assays found that the expression of INO1 was significantly higher in WRC 6. These results suggest that not only the gene itself but regulation of INO1 gene expression at early developmental stages is important in determining PA content in rice.
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Affiliation(s)
- Ishara Perera
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan
- Grain Legumes and Oil Crops Research and Development Centre, Department of Agriculture, Angunakolapelessa, Sri Lanka
| | - Ayaka Fukushima
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan
| | - Tatsuki Akabane
- Faculty of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan
| | - Genki Horiguchi
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan
| | - Saman Seneweera
- National Institute of Fundamental Studies, Hantana Road, Kandy, Sri Lanka
- Centre for Crop Health, University of Southern Queensland, Toowoomba, QLD, 4350, Australia
| | - Naoki Hirotsu
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan.
- Faculty of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan.
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Pearson GA, Martins N, Madeira P, Serrão EA, Bartsch I. Sex-dependent and -independent transcriptional changes during haploid phase gametogenesis in the sugar kelp Saccharina latissima. PLoS One 2019; 14:e0219723. [PMID: 31513596 PMCID: PMC6742357 DOI: 10.1371/journal.pone.0219723] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 08/27/2019] [Indexed: 11/26/2022] Open
Abstract
In haplodiplontic lineages, sexual reproduction occurs in haploid parents without meiosis. Although widespread in multicellular lineages such as brown algae (Phaeophyceae), haplodiplontic gametogenesis has been little studied at the molecular level. We addressed this by generating an annotated reference transcriptome for the gametophytic phase of the sugar kelp, Saccharina latissima. Transcriptional profiles of microscopic male and female gametophytes were analysed at four time points during the transition from vegetative growth to gametogenesis. Gametogenic signals resulting from a switch in culture irradiance from red to white light activated a core set of genes in a sex-independent manner, involving rapid activation of ribosome biogenesis, transcription and translation related pathways, with several acting at the post-transcriptional or post-translational level. Additional genes regulating nutrient acquisition and key carbohydrate-energy pathways were also identified. Candidate sex-biased genes under gametogenic conditions had potentially key roles in controlling female- and male-specific gametogenesis. Among these were several sex-biased or -specific E3 ubiquitin-protein ligases that may have important regulatory roles. Females specifically expressed several genes that coordinate gene expression and/or protein degradation, and the synthesis of inositol-containing compounds. Other female-biased genes supported parallels with oogenesis in divergent multicellular lineages, in particular reactive oxygen signalling via an NADPH-oxidase. Males specifically expressed the hypothesised brown algal sex-determining factor. Male-biased expression mainly involved upregulation of genes that control mitotic cell proliferation and spermatogenesis in other systems, as well as multiple flagella-related genes. Our data and results enhance genome-level understanding of gametogenesis in this ecologically and economically important multicellular lineage.
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Affiliation(s)
- Gareth A. Pearson
- Centre for Marine Sciences (CCMAR)-CIMAR, University of Algarve, Portugal
| | - Neusa Martins
- Centre for Marine Sciences (CCMAR)-CIMAR, University of Algarve, Portugal
| | - Pedro Madeira
- Centre for Marine Sciences (CCMAR)-CIMAR, University of Algarve, Portugal
| | - Ester A. Serrão
- Centre for Marine Sciences (CCMAR)-CIMAR, University of Algarve, Portugal
| | - Inka Bartsch
- Alfred-Wegener-Institute, Helmholtz Center for Polar and Marine Research, Am Handelshafen, Germany
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53
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Shiri Y, Solouki M, Ebrahimie E, Emamjomeh A, Zahiri J. Gibberellin causes wide transcriptional modifications in the early stage of grape cluster development. Genomics 2019; 112:820-830. [PMID: 31136791 DOI: 10.1016/j.ygeno.2019.05.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 05/01/2019] [Accepted: 05/24/2019] [Indexed: 10/26/2022]
Abstract
Yaghooti grape of Sistan is seedless, early ripening but has compact clusters. To study gibberellin effect on cluster compactness of Yaghooti grape, it has been studied transcriptomic changes in three developmental stages (cluster formation, berry formation and final size of cluster). We found out that 5409 of 22,756 genes in cluster tissue showed significant changes under gibberellin. Finally, it was showed that 2855, 2862 and 497 genes have critically important role on above developmental stages, respectively. GO enrichment analysis showed that gibberellin enhances biochemical pathways activity. Moreover, genes involved in ribosomal structure and photosynthesis rate in cluster tissue were up- and down- regulated, respectively. In addition, we observed location of metabolomic activities was transferred from nucleus to cytoplasm and from cytoplasm to cell wall and intercellular spaces during cluster development; but there is not such situation in gibberellin treated samples.
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Affiliation(s)
- Yasoub Shiri
- Department of Agronomy and Plant Breeding, Agriculture Research Center, University of Zabol, Zabol, Iran
| | - Mahmood Solouki
- Laboratory of Computational Biotechnology and Bioinformatics (CBB), Department of Plant Breeding and Biotechnology (PBB), Faculty of Agriculture, University of Zabol, Zabol, Iran.
| | - Esmaeil Ebrahimie
- School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia; Genomics Research Platform, School of Life Sciences, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Abbasali Emamjomeh
- Laboratory of Computational Biotechnology and Bioinformatics (CBB), Department of Plant Breeding and Biotechnology (PBB), Faculty of Agriculture, University of Zabol, Zabol, Iran.
| | - Javad Zahiri
- Bioinformatics and Computational Omics Lab (BioCOOL), Department of Biophysics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
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54
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A Cotton ( Gossypium hirsutum) Myo-Inositol-1-Phosphate Synthase ( GhMIPS1D) Gene Promotes Root Cell Elongation in Arabidopsis. Int J Mol Sci 2019; 20:ijms20051224. [PMID: 30862084 PMCID: PMC6429088 DOI: 10.3390/ijms20051224] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/22/2019] [Accepted: 02/26/2019] [Indexed: 01/24/2023] Open
Abstract
Myo-inositol-1-phosphate synthase (MIPS, EC 5.5.1.4) plays important roles in plant growth and development, stress responses, and cellular signal transduction. MIPS genes were found preferably expressed during fiber cell initiation and early fast elongation in upland cotton (Gossypium hirsutum), however, current understanding of the function and regulatory mechanism of MIPS genes to involve in cotton fiber cell growth is limited. Here, by genome-wide analysis, we identified four GhMIPS genes anchoring onto four chromosomes in G. hirsutum and analyzed their phylogenetic relationship, evolutionary dynamics, gene structure and motif distribution, which indicates that MIPS genes are highly conserved from prokaryotes to green plants, with further exon-intron structure analysis showing more diverse in Brassicales plants. Of the four GhMIPS members, based on the significant accumulated expression of GhMIPS1D at the early stage of fiber fast elongating development, thereby, the GhMIPS1D was selected to investigate the function of participating in plant development and cell growth, with ectopic expression in the loss-of-function Arabidopsis mips1 mutants. The results showed that GhMIPS1D is a functional gene to fully compensate the abnormal phenotypes of the deformed cotyledon, dwarfed plants, increased inflorescence branches, and reduced primary root lengths in Arabidopsis mips1 mutants. Furthermore, shortened root cells were recovered and normal root cells were significantly promoted by ectopic expression of GhMIPS1D in Arabidopsis mips1 mutant and wild-type plants respectively. These results serve as a foundation for understanding the MIPS family genes in cotton, and suggest that GhMIPS1D may function as a positive regulator for plant cell elongation.
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Augustijn D, van Tol N, van der Zaal BJ, de Groot HJM, Alia A. High-resolution magic angle spinning NMR studies for metabolic characterization of Arabidopsis thaliana mutants with enhanced growth characteristics. PLoS One 2018; 13:e0209695. [PMID: 30596736 PMCID: PMC6312362 DOI: 10.1371/journal.pone.0209695] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 12/10/2018] [Indexed: 02/07/2023] Open
Abstract
Developing smart crops which yield more biomass to meet the increasing demand for plant biomass has been an active area of research in last few decades. We investigated metabolic alterations in two Arabidopsis thaliana mutants with enhanced growth characteristics that were previously obtained from a collection of plant lines expressing artificial transcription factors. The metabolic profiles were obtained directly from intact Arabidopsis leaves using high-resolution magic angle spinning (HR-MAS) NMR. Multivariate analysis showed significant alteration of metabolite levels between the mutants and the wild-type Col-0. Interestingly, most of the metabolites that were reduced in the faster-growing mutants are generally involved in the defence against stress. These results suggest a growth-defence trade-off in the phenotypically engineered mutants. Our results further corroborate the idea that plant growth can be enhanced by suppressing defence pathways.
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Affiliation(s)
| | - Niels van Tol
- Institute of Biology Leiden, Leiden University, BE, Leiden, The Netherlands
| | | | - Huub J. M. de Groot
- Leiden Institute of Chemistry, Leiden University, RA Leiden, The Netherlands
| | - A. Alia
- Leiden Institute of Chemistry, Leiden University, RA Leiden, The Netherlands
- Institute of Medical Physics and Biophysics, University of Leipzig, Leipzig, Germany
- * E-mail:
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56
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Hu L, Zhou K, Li Y, Chen X, Liu B, Li C, Gong X, Ma F. Exogenous myo-inositol alleviates salinity-induced stress in Malus hupehensis Rehd. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 133:116-126. [PMID: 30399545 DOI: 10.1016/j.plaphy.2018.10.037] [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: 09/03/2018] [Revised: 10/14/2018] [Accepted: 10/30/2018] [Indexed: 05/22/2023]
Abstract
Myo-inositol mediates various physiological processes and stress responses. Here, we investigated its role in Malus hupehensis Rehd. plants when grown hydroponically under saline conditions. Salt-stressed plants showed reduced growth and marked declines in photosynthetic activity and chlorophyll concentrations. However, pretreatment with 50 μM myo-inositol significantly alleviated those inhibitions and enabled plants to maintain their photosynthetic capacity. In addition to changing stomatal behavior, exogenous myo-inositol inhibited ROS accumulation and Na+ uptake. In contrast, activities of antioxidant systems were enhanced, and expression was elevated for genes involved in Na+ uptake (e.g., HKT1, NHX1, SOS1, and SOS2). This exogenous application also provoked the accumulation of sugars or sugar alcohols, which partially contributed to the maintenance of osmotic balance, and the scavenging of ROS, either directly or indirectly. In summary, myo-inositol appears to alleviate the salt-induced inhibition of physiological processes for M. hupehensis, not only by supporting the plant's antioxidant defense system but also by mediating Na+ and K+ homeostasis and the osmotic balance.
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Affiliation(s)
- Lingyu Hu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Kun Zhou
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Yangtiansu Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Xiaofeng Chen
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Bingbing Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Cuiying Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Xiaoqing Gong
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
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Kc S, Liu M, Zhang Q, Fan K, Shi Y, Ruan J. Metabolic Changes of Amino Acids and Flavonoids in Tea Plants in Response to Inorganic Phosphate Limitation. Int J Mol Sci 2018; 19:ijms19113683. [PMID: 30469347 PMCID: PMC6274676 DOI: 10.3390/ijms19113683] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 11/14/2018] [Accepted: 11/17/2018] [Indexed: 11/16/2022] Open
Abstract
The qualities of tea (Camellia sinensis) are not clearly understood in terms of integrated leading molecular regulatory network mechanisms behind inorganic phosphate (Pi) limitation. Thus, the present work aims to elucidate transcription factor-dependent responses of quality-related metabolites and the expression of genes to phosphate (P) starvation. The tea plant organs were subjected to metabolomics analysis by GC×GC-TOF/MS and UPLC-Q-TOF/MS along with transcription factors and 13 metabolic genes by qRT-PCR. We found P starvation upregulated SPX2 and the change response of Pi is highly dependent on young shoots. This led to increased change in abundance of carbohydrates (fructose and glucose), amino acids in leaves (threonine and methionine), and root (phenylalanine, alanine, tryptophan, and tyrosine). Flavonoids and their glycosides accumulated in leaves and root exposed to P limitation was consistent with the upregulated expression of anthocyanidin reductase (EC 1.3.1.77), leucoanthocyanidin dioxygenase (EC 1.4.11.19) and glycosyltransferases (UGT78D1, UGT78D2 and UGT57L12). Despite the similar kinetics and high correlation response of Pi and SPX2 in young shoots, predominating theanine and other amino acids (serine, threonine, glutamate, valine, methionine, phenylalanine) and catechin (EGC, EGCG and CG) content displayed opposite changes in response to Pi limitation between Fengqing and Longjing-43 tea cultivars.
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Affiliation(s)
- Santosh Kc
- Graduate School of the Chinese Academy of Agricultural Sciences (GSCAAS), Zhongguancun Nandajie, Haidian, Beijing 100081, China.
- Tea Research Institute (TRICAAS), 9 Meiling South Road, Hangzhou 310008, China.
| | - Meiya Liu
- Tea Research Institute (TRICAAS), 9 Meiling South Road, Hangzhou 310008, China.
| | - Qunfeng Zhang
- Tea Research Institute (TRICAAS), 9 Meiling South Road, Hangzhou 310008, China.
| | - Kai Fan
- Tea Research Institute (TRICAAS), 9 Meiling South Road, Hangzhou 310008, China.
| | - Yuanzhi Shi
- Tea Research Institute (TRICAAS), 9 Meiling South Road, Hangzhou 310008, China.
| | - Jianyun Ruan
- Tea Research Institute (TRICAAS), 9 Meiling South Road, Hangzhou 310008, China.
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Strobl SM, Kischka D, Heilmann I, Mouille G, Schneider S. The Tonoplastic Inositol Transporter INT1 From Arabidopsis thaliana Impacts Cell Elongation in a Sucrose-Dependent Way. FRONTIERS IN PLANT SCIENCE 2018; 9:1657. [PMID: 30505313 PMCID: PMC6250803 DOI: 10.3389/fpls.2018.01657] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 10/25/2018] [Indexed: 05/29/2023]
Abstract
The tonoplastic inositol transporter INT1 is the only known transport protein in Arabidopsis that facilitates myo-inositol import from the vacuole into the cytoplasm. Impairment of the release of vacuolar inositol by knockout of INT1 results in a severe inhibition of cell elongation in roots as well as in etiolated hypocotyls. Importantly, a more strongly reduced cell elongation was observed when sucrose was supplied in the growth medium, and this sucrose-dependent effect can be complemented by the addition of exogenous myo-inositol. Comparing int1 mutants (defective in transport) with mutants defective in myo-inositol biosynthesis (mips1 mutants) revealed that the sucrose-induced inhibition in cell elongation does not just depend on inositol depletion. Secondary effects as observed for altered availability of inositol in biosynthesis mutants, as disturbed membrane turnover, alterations in PIN protein localization or alterations in inositol-derived signaling molecules could be ruled out to be responsible for impairing the cell elongation in int1 mutants. Although the molecular mechanism remains to be elucidated, our data implicate a crucial role of INT1-transported myo-inositol in regulating cell elongation in a sucrose-dependent manner and underline recent reports of regulatory roles for sucrose and other carbohydrate intermediates as metabolic semaphores.
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Affiliation(s)
- Sabrina Maria Strobl
- Molecular Plant Physiology, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Dominik Kischka
- Molecular Plant Physiology, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Ingo Heilmann
- Department of Cellular Biochemistry, Institute for Biochemistry and Biotechnology, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Grégory Mouille
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris Saclay, Versailles, France
| | - Sabine Schneider
- Molecular Plant Physiology, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
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59
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Kim SW, Gupta R, Min CW, Lee SH, Cheon YE, Meng QF, Jang JW, Hong CE, Lee JY, Jo IH, Kim ST. Label-free quantitative proteomic analysis of Panax ginseng leaves upon exposure to heat stress. J Ginseng Res 2018; 43:143-153. [PMID: 30662303 PMCID: PMC6323179 DOI: 10.1016/j.jgr.2018.09.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 08/28/2018] [Accepted: 09/27/2018] [Indexed: 11/25/2022] Open
Abstract
Background Ginseng is one of the well-known medicinal plants, exhibiting diverse medicinal effects. Its roots possess anticancer and antiaging properties and are being used in the medical systems of East Asian countries. It is grown in low-light and low-temperature conditions, and its growth is strongly inhibited at temperatures above 25°C. However, the molecular responses of ginseng to heat stress are currently poorly understood, especially at the protein level. Methods We used a shotgun proteomics approach to investigate the effect of heat stress on ginseng leaves. We monitored their photosynthetic efficiency to confirm physiological responses to a high-temperature stress. Results The results showed a reduction in photosynthetic efficiency on heat treatment (35°C) starting at 48 h. Label-free quantitative proteome analysis led to the identification of 3,332 proteins, of which 847 were differentially modulated in response to heat stress. The MapMan analysis showed that the proteins with increased abundance were mainly associated with antioxidant and translation-regulating activities, whereas the proteins related to the receptor and structural-binding activities exhibited decreased abundance. Several other proteins including chaperones, G-proteins, calcium-signaling proteins, transcription factors, and transfer/carrier proteins were specifically downregulated. Conclusion These results increase our understanding of heat stress responses in the leaves of ginseng at the protein level, for the first time providing a resource for the scientific community.
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Affiliation(s)
- So Wun Kim
- Department of Plant Bioscience, Pusan National University, Miryang, Republic of Korea
| | - Ravi Gupta
- Department of Plant Bioscience, Pusan National University, Miryang, Republic of Korea
| | - Cheol Woo Min
- Department of Plant Bioscience, Pusan National University, Miryang, Republic of Korea
| | - Seo Hyun Lee
- Department of Plant Bioscience, Pusan National University, Miryang, Republic of Korea
| | - Ye Eun Cheon
- Department of Plant Bioscience, Pusan National University, Miryang, Republic of Korea
| | - Qing Feng Meng
- Department of Plant Bioscience, Pusan National University, Miryang, Republic of Korea
| | - Jeong Woo Jang
- Department of Plant Bioscience, Pusan National University, Miryang, Republic of Korea
| | - Chi Eun Hong
- Department of Herbal Crop Research, Rural Development Administration, Eumseong, Republic of Korea
| | - Ji Yoon Lee
- National Instrumentation Center for Environmental Management, Seoul National University, Seoul, Republic of Korea
| | - Ick Hyun Jo
- Department of Herbal Crop Research, Rural Development Administration, Eumseong, Republic of Korea
| | - Sun Tae Kim
- Department of Plant Bioscience, Pusan National University, Miryang, Republic of Korea
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60
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Chen C, Chen K, Su T, Zhang B, Li G, Pan J, Si M. Myo-inositol-1-phosphate synthase (Ino-1) functions as a protection mechanism in Corynebacterium glutamicum under oxidative stress. Microbiologyopen 2018; 8:e00721. [PMID: 30270521 PMCID: PMC6528642 DOI: 10.1002/mbo3.721] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 08/06/2018] [Accepted: 08/07/2018] [Indexed: 11/12/2022] Open
Abstract
Reactive oxygen species (ROS) generated in aerobic metabolism and oxidative stress lead to macromolecules damage, such as to proteins, lipids, and DNA, which can be eliminated by the redox buffer mycothiol (AcCys-GlcN-Ins, MSH). Myo-inositol-phosphate synthase (Ino-1) catalyzes the first committed step in the synthesis of MSH, thus playing a critical role in the growth of the organism. Although Ino-1s have been systematically studied in eukaryotes, their physiological and biochemical functions remain largely unknown in bacteria. In this study, we report that Ino-1 plays an important role in oxidative stress resistance in the gram-positive Actinobacteria Corynebacterium glutamicum. Deletion of the ino-1 gene resulted in a decrease in cell viability, an increase in ROS production, and the aggravation of protein carbonylation levels under various stress conditions. The physiological roles of Ino-1 in the resistance to oxidative stresses were corroborated by the absence of MSH in the Δino-1 mutant. In addition, we found that the homologous expression of Ino-1 in C. glutamicum yielded a functionally active protein, while when expressed in Escherichia coliBL21(DE3), it lacked measurable activity. An examination of the molecular mass (Mr) suggested that Ino-1 expressed in E. coliBL21(DE3) was not folded in a catalytically competent conformation. Together, the results unequivocally showed that Ino-1 was important for the mediation of oxidative resistance by C. glutamicum.
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Affiliation(s)
- Can Chen
- College of Life Sciences, Qufu Normal University, Qufu, Shandong, China.,Institute of Food and Drug Inspection, College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, Henan, China.,Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Keqi Chen
- Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Tao Su
- College of Life Sciences, Qufu Normal University, Qufu, Shandong, China
| | - Bing Zhang
- Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Guizhi Li
- College of Life Sciences, Qufu Normal University, Qufu, Shandong, China
| | - Junfeng Pan
- Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Meiru Si
- College of Life Sciences, Qufu Normal University, Qufu, Shandong, China
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61
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Zhang J, Yang N, Li Y, Zhu S, Zhang S, Sun Y, Zhang HX, Wang L, Su H. Overexpression of PeMIPS1 confers tolerance to salt and copper stresses by scavenging reactive oxygen species in transgenic poplar. TREE PHYSIOLOGY 2018; 38:1566-1577. [PMID: 29579299 DOI: 10.1093/treephys/tpy028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Accepted: 02/23/2018] [Indexed: 06/08/2023]
Abstract
Myo-inositol is a vital compound in plants. As the key rate-limiting enzyme in myo-inositol biosynthesis, l-myo-inositol-1-phosphate synthase (MIPS) is regarded as a determinant of the myo-inositol content in plants. The up-regulation of MIPS genes can increase the myo-inositol content, thereby enhancing the plant's resistance to a variety of stresses. However, there are few reports on the roles of myo-inositol and the identification of MIPS in woody trees. In this study, a MIPS gene, named as PeMIPS1, was characterized from Populus euphratica Oliv. The heterologous expression of PeMIPS1 compensated for inositol production in the yeast inositol auxotrophic mutant ino1 and the phenotypic lesions of the atmips1-2 mutant, an Arabidopsis MIPS1 knock-out mutant. A subcellular location analysis showed that the PeMIPS1-GFP fusion was localized in the nucleus and cytoplasm, but not in the chloroplasts, indicating that PeMIPS1 represented the cytosolic form of MIPS in P. euphratica. Interestingly, PeMIPS1 was not only inducible by drought and high salinity, but also by CuSO4 treatment. The transgenic poplar lines overexpressing PeMIPS1 had greater plant heights, shoot biomasses and survival rates than the wild type during the salt- or copper-stress treatment, and this was accompanied by an increase in the myo-inositol content. The overexpression of PeMIPS1 resulted in the increased activities of antioxidant enzymes and the accumulation of ascorbate, a key nonenzymatic antioxidant in plant, which partly accounted for the enhanced reactive oxygen species-scavenging capacity and the lowered hydrogen peroxide and malondialdehyde levels in the transgenic poplar. To the best of our knowledge, this study is the first to report the roles of MIPS genes in the tolerance to copper stress.
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Affiliation(s)
- Jing Zhang
- College of Life Sciences, Ludong University, Yantai, Shandong, PR China
| | - Nan Yang
- College of Life Sciences, Ludong University, Yantai, Shandong, PR China
| | - Yuanyuan Li
- College of Life Sciences, Ludong University, Yantai, Shandong, PR China
| | - Shidong Zhu
- College of Life Sciences, Ludong University, Yantai, Shandong, PR China
| | - Shengnan Zhang
- College of Agriculture, Ludong University, Yantai, Shandong, PR China
| | - Yadong Sun
- College of Agriculture, Ludong University, Yantai, Shandong, PR China
| | - Hong-Xia Zhang
- College of Agriculture, Ludong University, Yantai, Shandong, PR China
| | - Lei Wang
- College of Life Sciences, Ludong University, Yantai, Shandong, PR China
| | - Hongyan Su
- College of Agriculture, Ludong University, Yantai, Shandong, PR China
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Al-Suod H, Pomastowski P, Ligor M, Railean-Plugaru V, Buszewski B. New approach for fast identification of cyclitols by MALDI-TOF mass spectrometry. PHYTOCHEMICAL ANALYSIS : PCA 2018; 29:528-537. [PMID: 29732635 DOI: 10.1002/pca.2764] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 02/09/2018] [Accepted: 02/12/2018] [Indexed: 06/08/2023]
Abstract
INTRODUCTION Alfalfa (Medicago sativa L.) is the subject of many studies due to its numerous chemical constituents and beneficial properties. Among these constituents are cyclitols, which have attracted attention due to the variety of biological properties they have. OBJECTIVE A rapid and sensitive analytical procedure based on matrix-assisted laser desorption ionisation technique with time-of-flight and mass spectrometry (MALDI-TOF-MS) analysis was used for the first time for the identification of three cyclitols from different parts of alfalfa. METHODOLOGY Plant extracts were prepared and purified using Soxhlet extraction and solid-phase extraction (SPE). Then, samples were dissolved in α-cyano-4-hydroxycinnamic acid (HCCA) matrix, and subjected to MALDI-TOF-MS analysis. RESULTS The ion at m/z 524.0 was distributed in all standards and in leaves and stem extracts. In turn, the signal at m/z 335.1 was found in all standards and all alfalfa extracts. The ion at m/z144.1 was found just for d-chiro-inositol and distributed in all extracts. Both signals at m/z 265.9 and 250.0 were found only in l-chiro-inositol standard and the extract of stem. However, the ion at m/z 177.1 was found in d-pinitol standard and the extract of leaves. Based on molecular weights, information on fragment ions obtained by MALDI-TOF-MS, and the chemistry of cyclitols, we successfully identified three cyclitols (d-chiro-inositol, l-chiro-inositol, d-pinitol) in different parts of alfalfa (leaves, stem, flowers). CONCLUSION The obtained results in this study proved that MALDI-TOF-MS is a rapid, sensitive and very powerful tool for identification of cyclitols within plants and has the potential to differentiate between enantiomers.
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Affiliation(s)
- Hossam Al-Suod
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Torun, Poland
| | - Paweł Pomastowski
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Torun, Poland
| | - Magdalena Ligor
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland
| | - Viorica Railean-Plugaru
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Torun, Poland
| | - Bogusław Buszewski
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Torun, Poland
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Disruption of INOS, a Gene Encoding myo-Inositol Phosphate Synthase, Causes Male Sterility in Drosophila melanogaster. G3-GENES GENOMES GENETICS 2018; 8:2913-2922. [PMID: 29991509 PMCID: PMC6118315 DOI: 10.1534/g3.118.200403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Inositol is a precursor for the phospholipid membrane component phosphatidylinositol (PI), involved in signal transduction pathways, endoplasmic reticulum stress, and osmoregulation. Alterations of inositol metabolism have been implicated in human reproductive issues, the therapeutic effects of drugs used to treat epilepsy and bipolar disorder, spinal cord defects, and diseases including diabetes and Alzheimer’s. The sole known inositol synthetic enzyme is myo-inositol synthase (MIPS), and the homolog in Drosophilia melanogaster is encoded by the Inos gene. Three identical deletion strains (inosΔDF/CyO) were constructed, confirmed by PCR and sequencing, and homozygotes (inosΔDF/inosΔDF) were shown to lack the transcript encoding the MIPS enzyme. Without inositol, homozygous inosΔDF deletion fertilized eggs develop only to the first-instar larval stage. When transferred as pupae to food without inositol, however, inosΔDF homozygotes die significantly sooner than wild-type flies. Even with dietary inositol the homozygous inosΔDF males are sterile. An inos allele, with a P-element inserted into the first intron, fails to complement this male sterile phenotype. An additional copy of the Inos gene inserted into another chromosome rescues all the phenotypes. These genetic and phenotypic analyses establish D. melanogaster as an excellent model organism in which to examine the role of inositol synthesis in development and reproduction.
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Krasensky-Wrzaczek J, Kangasjärvi J. The role of reactive oxygen species in the integration of temperature and light signals. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:3347-3358. [PMID: 29514325 DOI: 10.1093/jxb/ery074] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 02/13/2018] [Indexed: 05/22/2023]
Abstract
The remarkable plasticity of the biochemical machinery in plants allows the integration of a multitude of stimuli, enabling acclimation to a wide range of growth conditions. The integration of information on light and temperature enables plants to sense seasonal changes and adjust growth, defense, and transition to flowering according to the prevailing conditions. By now, the role of reactive oxygen species (ROS) as important signaling molecules has been established. Here, we review recent data on ROS as important components in the integration of light and temperature signaling by crosstalk with the circadian clock and calcium signaling. Furthermore, we highlight that different environmental conditions critically affect the interpretation of stress stimuli, and consequently defense mechanisms and stress outcome. For example, day length plays an important role in whether enhanced ROS production under stress conditions is directed towards activation of redox poising mechanisms or triggering programmed cell death (PCD). Furthermore, a mild increase in temperature can cause down-regulation of immunity and render plants more sensitive to biotrophic pathogens. Taken together, the evidence presented here demonstrates the complexity of signaling pathways and outline the importance of their correct interpretation in context with the given environmental conditions.
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Affiliation(s)
- Julia Krasensky-Wrzaczek
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finl
| | - Jaakko Kangasjärvi
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finl
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65
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Fleet CM, Yen JY, Hill EA, Gillaspy GE. Co-suppression of AtMIPS demonstrates cooperation of MIPS1, MIPS2 and MIPS3 in maintaining myo-inositol synthesis. PLANT MOLECULAR BIOLOGY 2018; 97:253-263. [PMID: 29777485 DOI: 10.1007/s11103-018-0737-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 05/11/2018] [Indexed: 06/08/2023]
Abstract
Co-suppressed MIPS2 transgenic lines allow bypass of the embryo lethal phenotype of the previously published triple knock-out and demonstrate the effects of MIPS on later stages of development. Regulation of inositol production is of interest broadly for its effects on plant growth and development. The enzyme L-myo-inositol 1-phosphate synthase (MIPS, also known as IPS) isomerizes D-glucose-6-P to D-inositol 3-P, and this is the rate-limiting step in inositol production. In Arabidopsis thaliana, the MIPS enzyme is encoded by three different genes, (AtMIPS1, AtMIPS2 and AtMIPS3), each of which has been shown to produce proteins with biochemically similar properties but differential expression patterns. Here, we report phenotypic and biochemical effects of MIPS co-suppression. We show that some plants engineered to overexpress MIPS2 in fact show reduced expression of AtMIPS1, AtMIPS2 and AtMIPS3, and show altered vegetative phenotype, reduced size and root length, and delayed flowering. Additionally, these plants show reduced inositol, increased glucose levels, and alteration of other metabolites. Our results suggest that the three AtMIPS genes work together to impact the overall synthesis of myo-inositol and overall inositol homeostasis.
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Affiliation(s)
- C M Fleet
- Biology Department, Emory & Henry College, Emory, VA, 24327, USA.
| | - J Y Yen
- Department of Biological Systems Engineering, Virginia Tech, Blacksburg, VA, 24061, USA
- Department of Plant Biology, Carnegie Institution for Science, 260 Panama Street, Stanford, CA, 93405, USA
| | - E A Hill
- Biology Department, Emory & Henry College, Emory, VA, 24327, USA
- Lincoln Memorial University College of Veterinary Medicine, Harrogate, TN, 37752, USA
| | - G E Gillaspy
- Department of Biochemistry, Virginia Tech, Blacksburg, VA, 24061, USA
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66
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Cominelli E, Confalonieri M, Carlessi M, Cortinovis G, Daminati MG, Porch TG, Losa A, Sparvoli F. Phytic acid transport in Phaseolus vulgaris: A new low phytic acid mutant in the PvMRP1 gene and study of the PvMRPs promoters in two different plant systems. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 270:1-12. [PMID: 29576062 DOI: 10.1016/j.plantsci.2018.02.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 02/02/2018] [Accepted: 02/05/2018] [Indexed: 05/24/2023]
Abstract
Phytic acid (InsP6) is the main storage form of phosphate in seeds. In the plant it plays an important role in response to environmental stress and hormonal changes. InsP6 is a strong chelator of cations, reducing the bioavailability of essential minerals in the diet. Only a common bean low phytic acid (lpa1) mutant, affected in the PvMRP1 gene, coding for a putative tonoplastic phytic acid transporter, was described so far. This mutant is devoid of negative pleiotropic effects normally characterising lpa mutants. With the aim of isolating new common bean lpa mutants, an ethyl methane sulfonate mutagenized population was screened, resulting in the identification of an additional lpa1 allele. Other putative lpa lines were also isolated. The PvMRP2 gene is probably able to complement the phenotype of mutants affected in the PvMRP1 gene in tissues other than the seed. Only the PvMRP1 gene is expressed at appreciable levels in cotyledons. Arabidopsis thaliana and Medicago truncatula transgenic plants harbouring 1.5 kb portions of the intergenic 5' sequences of both PvMRP genes, fused upstream of the GUS reporter, were generated. GUS activity in different organs suggests a refined, species-specific mechanisms of regulation of gene expression for these two PvMRP genes.
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Affiliation(s)
- Eleonora Cominelli
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
| | - Massimo Confalonieri
- CREA Research Centre for Animal Production and Aquaculture (CREA-ZA), Viale Piacenza 29, 26900, Lodi, Italy.
| | - Martina Carlessi
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy; Present address: Plantlab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Via G. Guidiccioni, 8-10, 56010 Ghezzano (Pisa), Italy.
| | - Gaia Cortinovis
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
| | - Maria Gloria Daminati
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
| | - Timothy G Porch
- USDA-ARS, Tropical Agriculture Research Station, 2200 P.A. Campos Avenue, Suite 201, Mayaguez, 00680, Puerto Rico.
| | - Alessia Losa
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy; CREA Research Centre for Genomics and Bioinformatics (CREA-GB), Via Paullese 28, 26836 Montanaso Lombardo, Lodi, Italy.
| | - Francesca Sparvoli
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
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Qin P, Fan S, Deng L, Zhong G, Zhang S, Li M, Chen W, Wang G, Tu B, Wang Y, Chen X, Ma B, Li S. LML1, Encoding a Conserved Eukaryotic Release Factor 1 Protein, Regulates Cell Death and Pathogen Resistance by Forming a Conserved Complex with SPL33 in Rice. PLANT & CELL PHYSIOLOGY 2018; 59:887-902. [PMID: 29566164 DOI: 10.1093/pcp/pcy056] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 03/09/2018] [Indexed: 06/08/2023]
Abstract
Lesion mimic mutants are powerful tools for unveiling the molecular connections between cell death and pathogen resistance. Various proteins responsible for lesion mimics have been identified; however, the mechanisms underlying lesion formation and pathogen resistance are still unknown. Here, we identify a lesion mimic mutant in rice, lesion mimic leaf 1 (lml1). The lml1 mutant exhibited abnormal cell death and resistance to both bacterial blight and rice blast. LML1 is expressed in all types of leaf cells, and encodes a novel eukaryotic release factor 1 (eRF1) protein located in the endoplasmic reticulum. Protein sequences of LML1 orthologs are conserved in yeast, animals and plants. LML1 can partially rescue the growth delay phenotype of the LML1 yeast ortholog mutant, dom34. Both lml1 and mutants of AtLML1 (the LML1 Arabidopsis ortholog) exhibited a growth delay phenotype like dom34. This indicates that LML1 and its orthologs are functionally conserved. LML1 forms a functional complex with a eukaryotic elongation factor 1A (eEF1A)-like protein, SPL33/LMM5.1, whose mutant phenotype was similar to the lml1 phenotype. This complex was conserved between rice and yeast. Our work provides new insight into understanding the mechanism of cell death and pathogen resistance, and also lays a good foundation for studying the fundamental molecular function of Pelota/DOM34 and its orthologs in plants.
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Affiliation(s)
- Peng Qin
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
| | - Shijun Fan
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
| | - Luchang Deng
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
- Crop Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu, Sichuan, 610066, China
| | - Guangrong Zhong
- Hybrid Rice Research Center of Neijiang Academy of Agricultural, Neijiang, Sichuan 641000, China
| | - Siwei Zhang
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
| | - Meng Li
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
| | - Weilan Chen
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
| | - Geling Wang
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
| | - Bin Tu
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
| | - Yuping Wang
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
| | - Xuewei Chen
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
| | - Bingtian Ma
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
| | - Shigui Li
- Rice Research Institute of Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu Wenjiang, Sichuan 611130, China
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68
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Belgaroui N, Lacombe B, Rouached H, Hanin M. Phytase overexpression in Arabidopsis improves plant growth under osmotic stress and in combination with phosphate deficiency. Sci Rep 2018; 8:1137. [PMID: 29348608 PMCID: PMC5773496 DOI: 10.1038/s41598-018-19493-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 12/07/2017] [Indexed: 12/28/2022] Open
Abstract
Engineering osmotolerant plants is a challenge for modern agriculture. An interaction between osmotic stress response and phosphate homeostasis has been reported in plants, but the identity of molecules involved in this interaction remains unknown. In this study we assessed the role of phytic acid (PA) in response to osmotic stress and/or phosphate deficiency in Arabidopsis thaliana. For this purpose, we used Arabidopsis lines (L7 and L9) expressing a bacterial beta-propeller phytase PHY-US417, and a mutant in inositol polyphosphate kinase 1 gene (ipk1-1), which were characterized by low PA content, 40% (L7 and L9) and 83% (ipk1-1) of the wild-type (WT) plants level. We show that the PHY-overexpressor lines have higher osmotolerance and lower sensitivity to abscisic acid than ipk1-1 and WT. Furthermore, PHY-overexpressors showed an increase by more than 50% in foliar ascorbic acid levels and antioxidant enzyme activities compared to ipk1-1 and WT plants. Finally, PHY-overexpressors are more tolerant to combined mannitol stresses and phosphate deficiency than WT plants. Overall, our results demonstrate that the modulation of PA improves plant growth under osmotic stress, likely via stimulation of enzymatic and non-enzymatic antioxidant systems, and that beside its regulatory role in phosphate homeostasis, PA may be also involved in fine tuning osmotic stress response in plants.
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Affiliation(s)
- Nibras Belgaroui
- Laboratoire de Biotechnologie et Amélioration des Plantes, Centre de Biotechnologie de Sfax, BP "1177", 3018, Sfax, Tunisia
| | - Benoit Lacombe
- BPMP, CNRS, INRA, Montpellier SupAgro, Univ Montpellier, Montpellier, France
| | - Hatem Rouached
- BPMP, CNRS, INRA, Montpellier SupAgro, Univ Montpellier, Montpellier, France.
| | - Moez Hanin
- Laboratoire de Biotechnologie et Amélioration des Plantes, Centre de Biotechnologie de Sfax, BP "1177", 3018, Sfax, Tunisia. .,Unité de Génomique Fonctionnelle et Physiologie des Plantes, Institut Supérieur de Biotechnologie, Université de Sfax, BP "1175", 3038, Sfax, Tunisia.
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69
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Ma L, Li G. FAR1-RELATED SEQUENCE (FRS) and FRS-RELATED FACTOR (FRF) Family Proteins in Arabidopsis Growth and Development. FRONTIERS IN PLANT SCIENCE 2018; 9:692. [PMID: 29930561 PMCID: PMC6000157 DOI: 10.3389/fpls.2018.00692] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 05/07/2018] [Indexed: 05/18/2023]
Abstract
Transposable elements make important contributions to adaptation and evolution of their host genomes. The well-characterized transposase-derived transcription factor FAR-RED ELONGATED HYPOCOTYLS3 (FHY3) and its homologue FAR-RED IMPAIRED RESPONSE1 (FAR1) have crucial functions in plant growth and development. In addition, FHY3 and FAR1 are the founding members of the FRS (FAR1-RELATED SEQUENCE) and FRF (FRS-RELATED FACTOR) families, which are conserved among land plants. Although the coding sequences of many putative FRS and FRF orthologs have been found in various clades of angiosperms, their physiological functions remain elusive. Here, we summarize recent progress toward characterizing the molecular mechanisms of FHY3 and FAR1, as well as other FRS-FRF family proteins, examining their roles in regulating plant growth and development. This review also suggests future directions for further functional characterization of other FRS-FRF family proteins in plants.
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Affiliation(s)
- Lin Ma
- School of Biological Science and Technology, University of Jinan, Jinan, China
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Gang Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
- *Correspondence: Gang Li,
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70
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Proteomics reveals key proteins participating in growth difference between fall dormant and non-dormant alfalfa in terminal buds. J Proteomics 2017; 173:126-138. [PMID: 29229487 DOI: 10.1016/j.jprot.2017.11.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 11/18/2017] [Accepted: 11/30/2017] [Indexed: 12/14/2022]
Abstract
To explore the molecular mechanism of growth differences between fall dormant (FD) and non-FD alfalfa, we conducted iTRAQ-based quantitative proteomics on terminal buds of Maverick (FD) and Cuf101 (non-FD) cultivars, identified differential abundance protein species (DAPS) and verified expression profiling of certain corresponding mRNA by qRT-PCR. A total of 3872 protein species were annotated. Of the 90 DAPS, 56 and 34 were respectively up- and down-accumulated in Maverick, compared to Cuf101. They were grouped into 35 functional categories and enriched in seven pathways. Of which, auxin polar transport was up-regulated, while phenylpropanoid biosynthesis, pyruvate metabolism and transportation, vitamin B1 synthesis process and flavonoid biosynthesis were down-regulated in Maverick, comparing with Cuf101. In Maverick, mRNA abundances of l-asparaginase, chalcone and stilbene synthase family protein, cinnamyl alcohol dehydrogenase-like protein, thiazole biosynthetic enzyme, pyruvate dehydrogenase E1 beta subunit, and aldo/keto reductase family oxidoreductase were significantly lower at FD than at other stages, and lower than in Cuf101. We also observed opposite mRNA profiles of thiazole biosynthetic enzyme, chalcone and stilbene synthase family protein, pyruvate dehydrogenase E1 beta subunit in both cultivars from summer to autumn. Our results suggest that these DAPS could play important roles in growth difference between FD and non-FD alfalfa. BIOLOGICAL SIGNIFICANCE Up to now, as far as we know, currently the proteins related with the growth differences between FD and non-FD alfalfa cultivars in autumn have not yet been identified in terminal buds. This study identified the protein species expressed in alfalfa terminal buds, selected differentially abundant protein species in terminal buds between Maverick (FD) and Cuf101 (non-FD) cultivars in autumn and identified the important protein species participated in the growth differences. This study lays a foundation for further investigation of the molecular mechanism of the growth differences between FD and non-FD alfalfa and the cultivation of advanced alfalfa cultivars.
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71
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Redekar N, Pilot G, Raboy V, Li S, Saghai Maroof MA. Inference of Transcription Regulatory Network in Low Phytic Acid Soybean Seeds. FRONTIERS IN PLANT SCIENCE 2017; 8:2029. [PMID: 29250090 PMCID: PMC5714895 DOI: 10.3389/fpls.2017.02029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 11/14/2017] [Indexed: 05/26/2023]
Abstract
A dominant loss of function mutation in myo-inositol phosphate synthase (MIPS) gene and recessive loss of function mutations in two multidrug resistant protein type-ABC transporter genes not only reduce the seed phytic acid levels in soybean, but also affect the pathways associated with seed development, ultimately resulting in low emergence. To understand the regulatory mechanisms and identify key genes that intervene in the seed development process in low phytic acid crops, we performed computational inference of gene regulatory networks in low and normal phytic acid soybeans using a time course transcriptomic data and multiple network inference algorithms. We identified a set of putative candidate transcription factors and their regulatory interactions with genes that have functions in myo-inositol biosynthesis, auxin-ABA signaling, and seed dormancy. We evaluated the performance of our unsupervised network inference method by comparing the predicted regulatory network with published regulatory interactions in Arabidopsis. Some contrasting regulatory interactions were observed in low phytic acid mutants compared to non-mutant lines. These findings provide important hypotheses on expression regulation of myo-inositol metabolism and phytohormone signaling in developing low phytic acid soybeans. The computational pipeline used for unsupervised network learning in this study is provided as open source software and is freely available at https://lilabatvt.github.io/LPANetwork/.
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Affiliation(s)
- Neelam Redekar
- Department of Crop and Soil Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
| | - Guillaume Pilot
- Department of Plant Pathology, Physiology, and Weed Science, Virginia Tech, Blacksburg, VA, United States
| | - Victor Raboy
- National Small Grains Germplasm Research Center, Agricultural Research Service (USDA), Aberdeen, ID, United States
| | - Song Li
- Department of Crop and Soil Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
| | - M. A. Saghai Maroof
- Department of Crop and Soil Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
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D'Ambrosio JM, Couto D, Fabro G, Scuffi D, Lamattina L, Munnik T, Andersson MX, Álvarez ME, Zipfel C, Laxalt AM. Phospholipase C2 Affects MAMP-Triggered Immunity by Modulating ROS Production. PLANT PHYSIOLOGY 2017; 175:970-981. [PMID: 28827453 PMCID: PMC5619888 DOI: 10.1104/pp.17.00173] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 08/18/2017] [Indexed: 05/20/2023]
Abstract
The activation of phosphoinositide-specific phospholipase C (PI-PLC) is one of the earliest responses triggered by the recognition of several microbe-associated molecular patterns (MAMPs) in plants. The Arabidopsis (Arabidopsis thaliana) PI-PLC gene family is composed of nine members. Previous studies suggested a role for PLC2 in MAMP-triggered immunity, as it is rapidly phosphorylated in vivo upon treatment with the bacterial MAMP flg22. Here, we analyzed the role of PLC2 in plant immunity using an artificial microRNA to silence PLC2 expression in Arabidopsis. We found that PLC2-silenced plants are more susceptible to the type III secretion system-deficient bacterial strain Pseudomonas syringae pv tomato (Pst) DC3000 hrcC- and to the nonadapted pea (Pisum sativum) powdery mildew Erysiphe pisi However, PLC2-silenced plants display normal susceptibility to virulent (Pst DC3000) and avirulent (Pst DC3000 AvrRPM1) P. syringae strains, conserving typical hypersensitive response features. In response to flg22, PLC2-silenced plants maintain wild-type mitogen-activated protein kinase activation and PHI1, WRKY33, and FRK1 immune marker gene expression but have reduced reactive oxygen species (ROS)-dependent responses such as callose deposition and stomatal closure. Accordingly, the generation of ROS upon flg22 treatment is compromised in the PLC2-defficient plants, suggesting an effect of PLC2 in a branch of MAMP-triggered immunity and nonhost resistance that involves early ROS-regulated processes. Consistently, PLC2 associates with the NADPH oxidase RBOHD, suggesting its potential regulation by PLC2.
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Affiliation(s)
- Juan Martín D'Ambrosio
- Instituto de Investigaciones Biológicas IIB-Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Mar del Plata, 7600 Mar del Plata, Argentina
| | - Daniel Couto
- Sainsbury Laboratory, Norwich NR4 7UH, United Kingdom
| | - Georgina Fabro
- Centro de Investigaciones en Química Biológica de Córdoba, UNC-Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Córdoba, X5000HUA Cordoba, Argentina
| | - Denise Scuffi
- Instituto de Investigaciones Biológicas IIB-Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Mar del Plata, 7600 Mar del Plata, Argentina
| | - Lorenzo Lamattina
- Instituto de Investigaciones Biológicas IIB-Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Mar del Plata, 7600 Mar del Plata, Argentina
| | - Teun Munnik
- Swammerdam Institute for Life Sciences, Section Plant Cell Biology, University of Amsterdam, 1098 XH Amsterdam, The Netherlands
| | - Mats X Andersson
- Department of Biological and Environmental Sciences, University of Gothenburg, SE-405 30 Gothenburg, Sweden
| | - María E Álvarez
- Centro de Investigaciones en Química Biológica de Córdoba, UNC-Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Córdoba, X5000HUA Cordoba, Argentina
| | - Cyril Zipfel
- Sainsbury Laboratory, Norwich NR4 7UH, United Kingdom
| | - Ana M Laxalt
- Instituto de Investigaciones Biológicas IIB-Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Mar del Plata, 7600 Mar del Plata, Argentina
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73
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Barrero-Sicilia C, Silvestre S, Haslam RP, Michaelson LV. Lipid remodelling: Unravelling the response to cold stress in Arabidopsis and its extremophile relative Eutrema salsugineum. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 263:194-200. [PMID: 28818375 PMCID: PMC5567406 DOI: 10.1016/j.plantsci.2017.07.017] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 06/20/2017] [Accepted: 07/12/2017] [Indexed: 05/19/2023]
Abstract
Environmental constraints limit the geographic distribution of many economically important crops. Cold stress is an important abiotic stress that affects plant growth and development, resulting in loss of vigour and surface lesions. These symptoms are caused by, among other metabolic processes, the altered physical and chemical composition of cell membranes. As a major component of cell membranes lipids have been recognized as having a significant role in cold stress, both as a mechanical defence through leaf surface protection and plasma membrane remodelling, and as signal transduction molecules. We present an overview integrating gene expression and lipidomic data published so far in Arabidopsis and its relative the extremophile Eutrema salsugineum. This data enables a better understanding of the contribution of the lipidome in determining the ability to tolerate suboptimal temperature conditions. Collectively this information will allow us to identify the key lipids and pathways responsible for resilience, enabling the development of new approaches for crop tolerance to stress.
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Affiliation(s)
| | - Susana Silvestre
- Plant Sciences, Rothamsted Research, West Common, Harpenden, AL5 2JQ, UK
| | - Richard P Haslam
- Plant Sciences, Rothamsted Research, West Common, Harpenden, AL5 2JQ, UK.
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74
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iTRAQ-Based Quantitative Proteomic Analysis Reveals Cold Responsive Proteins Involved in Leaf Senescence in Upland Cotton (Gossypium hirsutum L.). Int J Mol Sci 2017; 18:ijms18091984. [PMID: 28926933 PMCID: PMC5618633 DOI: 10.3390/ijms18091984] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 09/08/2017] [Accepted: 09/11/2017] [Indexed: 11/21/2022] Open
Abstract
Premature leaf senescence occurs in the ultimate phase of the plant, and it occurs through a complex series of actions regulated by stress, hormones and genes. In this study, a proteomic analysis was performed to analyze the factors that could induce premature leaf senescence in two cotton cultivars. We successfully identified 443 differential abundant proteins (DAPs) from 7388 high-confidence proteins at four stages between non-premature senescence (NS) and premature senescence (PS), among which 158 proteins were over-accumulated, 238 proteins were down-accumulated at four stages, and 47 proteins displayed overlapped accumulation. All the DAPs were mapped onto 21 different categories on the basis of a Clusters of Orthologous Groups (COG) analysis, and 9 clusters were based on accumulation. Gene Ontology (GO) enrichment results show that processes related to stress responses, including responses to cold temperatures and responses to hormones, are significantly differentially accumulated. More importantly, the enriched proteins were mapped in The Arabidopsis Information Resource (TAIR), showing that 58 proteins play an active role in abiotic stress, hormone signaling and leaf senescence. Among these proteins, 26 cold-responsive proteins (CRPs) are significantly differentially accumulated. The meteorological data showed that the median temperatures declined at approximately 15 days before the onset of aging, suggesting that a decrease in temperature is tightly linked to an onset of cotton leaf senescence. Because accumulations of H2O2 and increased jasmonic acid (JA) were detected during PS, we speculate that two pathways associated with JA and H2O2 are closely related to premature leaf senescence in cotton.
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75
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Hurtado C, Parastar H, Matamoros V, Piña B, Tauler R, Bayona JM. Linking the morphological and metabolomic response of Lactuca sativa L exposed to emerging contaminants using GC × GC-MS and chemometric tools. Sci Rep 2017; 7:6546. [PMID: 28747703 PMCID: PMC5529569 DOI: 10.1038/s41598-017-06773-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 06/16/2017] [Indexed: 02/05/2023] Open
Abstract
The occurrence of contaminants of emerging concern (CECs) in irrigation waters (up to low μg L-1) and irrigated crops (ng g-1 in dry weight) has been reported, but the linkage between plant morphological changes and plant metabolomic response has not yet been addressed. In this study, a non-targeted metabolomic analysis was performed on lettuce (Lactuca sativa L) exposed to 11 CECs (pharmaceuticals, personal care products, anticorrosive agents and surfactants) by irrigation. The plants were watered with different CEC concentrations (0-50 µg L-1) for 34 days under controlled conditions and then harvested, extracted, derivatised and analysed by comprehensive two-dimensional gas chromatography coupled to a time-of-flight mass spectrometer (GC × GC-TOFMS). The resulting raw data were analysed using multivariate curve resolution (MCR) and partial least squares (PLS) methods. The metabolic response indicates that exposure to CECs at environmentally relevant concentrations (0.05 µg L-1) can cause significant metabolic alterations in plants (carbohydrate metabolism, the citric acid cycle, pentose phosphate pathway and glutathione pathway) linked to changes in morphological parameters (leaf height, stem width) and chlorophyll content.
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Affiliation(s)
- Carlos Hurtado
- Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034, Barcelona, Spain
| | - Hadi Parastar
- Department of Chemistry, Sharif University of Technology, Tehran, Iran
| | - Víctor Matamoros
- Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034, Barcelona, Spain
| | - Benjamín Piña
- Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034, Barcelona, Spain
| | - Romà Tauler
- Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034, Barcelona, Spain
| | - Josep M Bayona
- Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034, Barcelona, Spain.
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76
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Zhang RX, Qin LJ, Zhao DG. Overexpression of the OsIMP Gene Increases the Accumulation of Inositol and Confers Enhanced Cold Tolerance in Tobacco through Modulation of the Antioxidant Enzymes' Activities. Genes (Basel) 2017; 8:E179. [PMID: 28726715 PMCID: PMC5541312 DOI: 10.3390/genes8070179] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 06/16/2017] [Accepted: 07/04/2017] [Indexed: 01/07/2023] Open
Abstract
Inositol is a cyclic polyol that is involved in various physiological processes, including signal transduction and stress adaptation in plants. l-myo-inositol monophosphatase (IMPase) is one of the metal-dependent phosphatase family members and catalyzes the last reaction step of biosynthesis of inositol. Although increased IMPase activity induced by abiotic stress has been reported in chickpea plants, the role and regulation of the IMP gene in rice (Oryza sativa L.) remains poorly understood. In the present work, we obtained a full-length cDNA sequence coding IMPase in the cold tolerant rice landraces in Gaogonggui, which is named as OsIMP. Multiple alignment results have displayed that this sequence has characteristic signature motifs and conserved enzyme active sites of the phosphatase super family. Phylogenetic analysis showed that IMPase is most closely related to that of the wild rice Oryza brachyantha, while transcript analysis revealed that the expression of the OsIMP is significantly induced by cold stress and exogenous abscisic acid (ABA) treatment. Meanwhile, we cloned the 5' flanking promoter sequence of the OsIMP gene and identified several important cis-acting elements, such as LTR (low-temperature responsiveness), TCA-element (salicylic acid responsiveness), ABRE-element (abscisic acid responsiveness), GARE-motif (gibberellin responsive), MBS (MYB Binding Site) and other cis-acting elements related to defense and stress responsiveness. To further investigate the potential function of the OsIMP gene, we generated transgenic tobacco plants overexpressing the OsIMP gene and the cold tolerance test indicated that these transgenic tobacco plants exhibit improved cold tolerance. Furthermore, transgenic tobacco plants have a lower level of hydrogen peroxide (H₂O₂) and malondialdehyde (MDA), and a higher content of total chlorophyll as well as increased antioxidant enzyme activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD), when compared to wild type (WT) tobacco plants under normal and cold stress conditions.
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Affiliation(s)
- Rong-Xiang Zhang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region, Ministry of Education, Institute of Agro-Bioengineering and College of Life Sciences, Guizhou University, Guiyang 550025, China.
- College of Chemistry and Life Science, Guizhou Education University, Guiyang 550018, China.
| | - Li-Jun Qin
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region, Ministry of Education, Institute of Agro-Bioengineering and College of Life Sciences, Guizhou University, Guiyang 550025, China.
| | - De-Gang Zhao
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region, Ministry of Education, Institute of Agro-Bioengineering and College of Life Sciences, Guizhou University, Guiyang 550025, China.
- Guizhou Academy of Agricultural Sciences, Guiyang 550025, China.
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77
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Rayner T, Moreau C, Ambrose M, Isaac PG, Ellis N, Domoney C. Genetic Variation Controlling Wrinkled Seed Phenotypes in Pisum: How Lucky Was Mendel? Int J Mol Sci 2017; 18:E1205. [PMID: 28587311 PMCID: PMC5486028 DOI: 10.3390/ijms18061205] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 05/23/2017] [Accepted: 05/25/2017] [Indexed: 02/07/2023] Open
Abstract
One of the traits studied by Mendel in pea (Pisum sativum L.) was the wrinkled-seeded phenotype, and the molecular basis for a mutation underlying this phenotype was discovered in the 1990s. Although the starch-branching enzyme gene mutation identified at the genetic locus r is most likely to be that in seeds available to Mendel in the mid-1800s, it has remained an open question as to whether or not additional natural mutations in this gene exist within Pisum germplasm collections. Here, we explore this question and show that all but two wrinkled-seeded variants in one such collection correspond to either the mutant allele described previously for the r locus or a mutation at a second genetic locus, rb, affecting the gene encoding the large subunit of Adenosine diphosphoglucose (ADP-glucose) pyrophosphorylase; the molecular basis for the rb mutation is described here. The genetic basis for the phenotype of one (JI 2110) of the two lines which are neither r nor rb has been studied in crosses with a round-seeded variant (JI 281); for which extensive genetic marker data were expected. In marked contrast to the trait studied by Mendel and the rb phenotype; the data suggest that the wrinkled-seeded phenotype in JI 2110 is maternally determined, controlled by two genetic loci, and the extent to which it is manifested is very sensitive to the environment. Metabolite analysis of the cotyledons of JI 2110 revealed a profile for sucrose and sucrose-derived compounds that was more similar to that of wild-type round-seeded, than that of wrinkled-seeded r, pea lines. However, the metabolite profile of the seed coat (testa) of JI 2110 was distinct from that of other round-seeded genotypes tested which, together with analysis of recombinant inbred progeny lines, suggests an explanation for the seed phenotype.
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Affiliation(s)
- Tracey Rayner
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK.
| | - Carol Moreau
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK.
| | - Mike Ambrose
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK.
| | - Peter G Isaac
- IDna Genetics Ltd, Centrum, Norwich Research Park, Norwich NR4 7UG, UK.
| | - Noel Ellis
- Department of Biology Sciences, University of Auckland, Auckland 1142, New Zealand.
- Department of Crop Physiology, International Centre for Agricultural Research in the Dry Areas (ICARDA), Rabat 10106, Morocco.
| | - Claire Domoney
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK.
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78
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The biochemical properties of the two Arabidopsis thaliana isochorismate synthases. Biochem J 2017; 474:1579-1590. [PMID: 28356402 PMCID: PMC5408348 DOI: 10.1042/bcj20161069] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 03/25/2017] [Accepted: 03/28/2017] [Indexed: 12/05/2022]
Abstract
The important plant hormone salicylic acid (SA; 2-hydroxybenzoic acid) regulates several key plant responses including, most notably, defence against pathogens. A key enzyme for SA biosynthesis is isochorismate synthase (ICS), which converts chorismate into isochorismate, and for which there are two genes in Arabidopsis thaliana. One (AtICS1) has been shown to be required for increased SA biosynthesis in response to pathogens and its expression can be stimulated throughout the leaf by virus infection and exogenous SA. The other (AtICS2) appears to be expressed constitutively, predominantly in the plant vasculature. Here, we characterise the enzymatic activity of both isozymes expressed as hexahistidine fusion proteins in Escherichia coli. We show for the first time that recombinant AtICS2 is enzymatically active. Both isozymes are Mg2+-dependent with similar temperature optima (ca. 33°C) and similar Km values for chorismate of 34.3 ± 3.7 and 28.8 ± 6.9 µM for ICS1 and ICS2, respectively, but reaction rates were greater for ICS1 than for ICS2, with respective values for Vmax of 63.5 ± 2.4 and 28.3 ± 2.0 nM s−1 and for kcat of 38.1 ± 1.5 and 17.0 ± 1.2 min−1. However, neither enzyme displayed isochorismate pyruvate lyase (IPL) activity, which would enable these proteins to act as bifunctional SA synthases, i.e. to convert chorismate into SA. These results show that although Arabidopsis has two functional ICS enzymes, it must possess one or more IPL enzymes to complete biosynthesis of SA starting from chorismate.
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79
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Tripathi P, Singh PC, Mishra A, Srivastava S, Chauhan R, Awasthi S, Mishra S, Dwivedi S, Tripathi P, Kalra A, Tripathi RD, Nautiyal CS. Arsenic tolerant Trichoderma sp. reduces arsenic induced stress in chickpea (Cicer arietinum). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 223:137-145. [PMID: 28153415 DOI: 10.1016/j.envpol.2016.12.073] [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: 07/18/2016] [Revised: 12/20/2016] [Accepted: 12/25/2016] [Indexed: 06/06/2023]
Abstract
Toxic metalloids including arsenic (As) can neither be eliminated nor destroyed from environment; however, they can be converted from toxic to less/non-toxic forms. The form of As species and their concentration determines its toxicity in plants. Therefore, the microbe mediated biotransformation of As is crucial for its plant uptake and toxicity. In the present study the role of As tolerant Trichoderma in modulating As toxicity in chickpea plants was explored. Chickpea plants grown in arsenate spiked soil under green house conditions were inoculated with two plant growth promoting Trichoderma strains, M-35 (As tolerant) and PPLF-28 (As sensitive). Total As concentration in chickpea tissue was comparable in both the Trichoderma treatments, however, differences in levels of organic and inorganic As (iAs) species were observed. The shift in iAs to organic As species ratio in tolerant Trichoderma treatment correlated with enhanced plant growth and nutrient content. Arsenic stress amelioration in tolerant Trichoderma treatment was also evident through rhizospheric microbial community and anatomical studies of the stem morphology. Down regulation of abiotic stress responsive genes (MIPS, PGIP, CGG) in tolerant Trichoderma + As treatment as compared to As alone and sensitive Trichoderma + As treatment also revealed that tolerant strain enhanced the plant's potential to cope with As stress as compared to sensitive one. Considering the bioremediation and plant growth promotion potential, the tolerant Trichoderma may appear promising for its utilization in As affected fields for enhancing agricultural productivity.
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Affiliation(s)
- Pratibha Tripathi
- CSIR-National Botanical Research Institute, Lucknow 226001, India; CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow 226015, India
| | - Poonam C Singh
- CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Aradhana Mishra
- CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Suchi Srivastava
- CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Reshu Chauhan
- CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Surabhi Awasthi
- CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Seema Mishra
- CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Sanjay Dwivedi
- CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Preeti Tripathi
- CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Alok Kalra
- CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow 226015, India
| | - Rudra D Tripathi
- CSIR-National Botanical Research Institute, Lucknow 226001, India.
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80
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Abd-El-Haliem AM, Joosten MHAJ. Plant phosphatidylinositol-specific phospholipase C at the center of plant innate immunity. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2017; 59:164-179. [PMID: 28097830 DOI: 10.1111/jipb.12520] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 01/09/2017] [Indexed: 05/20/2023]
Abstract
Understanding plant resistance to pathogenic microbes requires detailed information on the molecular mechanisms controlling the execution of plant innate immune responses. A growing body of evidence places phosphoinositide-specific phospholipase C (PI-PLC) enzymes immediately downstream of activated immune receptors, well upstream of the initiation of early defense responses. An increase of the cytoplasmic levels of free Ca2+ , lowering of the intercellular pH and the oxidative burst are a few examples of such responses and these are regulated by PI-PLCs. Consequently, PI-PLC activation represents an early primary signaling switch between elicitation and response involving the controlled hydrolysis of essential signaling phospholipids, thereby simultaneously generating lipid and non-lipid second messenger molecules required for a swift cellular defense response. Here, we elaborate on the signals generated by PI-PLCs and their respective downstream effects, while providing an inventory of different types of evidence describing the involvement of PI-PLCs in various aspects of plant immunity. We project the discussed information into a model describing the cellular events occurring after the activation of plant immune receptors. With this review we aim to provide new insights supporting future research on plant PI-PLCs and the development of plants with improved resistance.
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Affiliation(s)
- Ahmed M Abd-El-Haliem
- Laboratory of Phytopathology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Matthieu H A J Joosten
- Laboratory of Phytopathology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
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81
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Jia J, Zhou J, Shi W, Cao X, Luo J, Polle A, Luo ZB. Comparative transcriptomic analysis reveals the roles of overlapping heat-/drought-responsive genes in poplars exposed to high temperature and drought. Sci Rep 2017; 7:43215. [PMID: 28233854 PMCID: PMC5324098 DOI: 10.1038/srep43215] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 01/20/2017] [Indexed: 02/03/2023] Open
Abstract
High temperature (HT) and drought are both critical factors that constrain tree growth and survival under global climate change, but it is surprising that the transcriptomic reprogramming and physiological relays involved in the response to HT and/or drought remain unknown in woody plants. Thus, Populus simonii saplings were exposed to either ambient temperature or HT combined with sufficient watering or drought. RNA-sequencing analysis showed that a large number of genes were differentially expressed in poplar roots and leaves in response to HT and/or desiccation, but only a small number of these genes were identified as overlapping heat-/drought-responsive genes that are mainly involved in RNA regulation, transport, hormone metabolism, and stress. Furthermore, the overlapping heat-/drought-responsive genes were co-expressed and formed hierarchical genetic regulatory networks under each condition compared. HT-/drought-induced transcriptomic reprogramming is linked to physiological relays in poplar roots and leaves. For instance, HT- and/or drought-induced abscisic acid accumulation and decreases in auxin and other phytohormones corresponded well with the differential expression of a few genes involved in hormone metabolism. These results suggest that overlapping heat-/drought-responsive genes will play key roles in the transcriptional and physiological reconfiguration of poplars to HT and/or drought under future climatic scenarios.
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Affiliation(s)
- Jingbo Jia
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China.,College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, P. R. China
| | - Jing Zhou
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Wenguang Shi
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Xu Cao
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, P. R. China
| | - Jie Luo
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, P. R. China
| | - Andrea Polle
- Büsgen-Institute, Department of Forest Botany and Tree Physiology, Georg-August University, Büsgenweg 2, 37077 Göttingen, Germany
| | - Zhi-Bin Luo
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
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82
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Liu Y, He C. A review of redox signaling and the control of MAP kinase pathway in plants. Redox Biol 2016; 11:192-204. [PMID: 27984790 PMCID: PMC5157795 DOI: 10.1016/j.redox.2016.12.009] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 12/08/2016] [Indexed: 02/02/2023] Open
Abstract
Mitogen-activated protein kinase (MAPK) cascades are evolutionarily conserved modules among eukaryotic species that range from yeast, plants, flies to mammals. In eukaryotic cells, reactive oxygen species (ROS) has both physiological and toxic effects. Both MAPK cascades and ROS signaling are involved in plant response to various biotic and abiotic stresses. It has been observed that not only can ROS induce MAPK activation, but also that disturbing MAPK cascades can modulate ROS production and responses. This review will discuss the potential mechanisms by which ROS may activate and/or regulate MAPK cascades in plants. The role of MAPK cascades and ROS signaling in regulating gene expression, stomatal function, and programmed cell death (PCD) is also discussed. In addition, the relationship between Rboh-dependent ROS production and MAPK activation in PAMP-triggered immunity will be reviewed.
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Affiliation(s)
- Yukun Liu
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, College of Forestry, Southwest Forestry University, 300 Bailong Si, Kunming 650224, Yunnan, People's Republic of China; Key Laboratory for Forest Genetic and Tree Improvement & Propagation in Universities of Yunnan Province, College of Forestry, Southwest Forestry University, 300 Bailong Si, Kunming 650224, Yunnan, People's Republic of China.
| | - Chengzhong He
- Key Laboratory for Forest Genetic and Tree Improvement & Propagation in Universities of Yunnan Province, College of Forestry, Southwest Forestry University, 300 Bailong Si, Kunming 650224, Yunnan, People's Republic of China
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83
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Song F, Su H, Yang N, Zhu L, Cheng J, Wang L, Cheng X. Myo-Inositol content determined by myo-inositol biosynthesis and oxidation in blueberry fruit. Food Chem 2016; 210:381-7. [DOI: 10.1016/j.foodchem.2016.04.099] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 04/20/2016] [Accepted: 04/20/2016] [Indexed: 12/29/2022]
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84
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Latrasse D, Benhamed M, Bergounioux C, Raynaud C, Delarue M. Plant programmed cell death from a chromatin point of view. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:5887-5900. [PMID: 27639093 DOI: 10.1093/jxb/erw329] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Programmed cell death (PCD) is a ubiquitous genetically regulated process consisting of the activation of finely controlled signalling pathways that lead to cellular suicide. PCD can be part of a developmental programme (dPCD) or be triggered by environmental conditions (ePCD). In plant cells, as in animal cells, extensive chromatin condensation and degradation of the nuclear DNA are among the most conspicuous features of cells undergoing PCD. Changes in chromatin condensation could either reflect the structural changes required for internucleosomal fragmentation of nuclear DNA or relate to large-scale chromatin rearrangements associated with a major transcriptional switch occurring during cell death. The aim of this review is to give an update on plant PCD processes from a chromatin point of view. The first part will be dedicated to chromatin conformational changes associated with cell death observed in various developmental and physiological conditions, whereas the second part will be devoted to histone dynamics and DNA modifications associated with critical changes in genome expression during the cell death process.
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Affiliation(s)
- D Latrasse
- Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Batiment 630, 91405 Orsay, France
- Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France
| | - M Benhamed
- Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Batiment 630, 91405 Orsay, France
- Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France
| | - C Bergounioux
- Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Batiment 630, 91405 Orsay, France
- Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France
| | - C Raynaud
- Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Batiment 630, 91405 Orsay, France
- Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France
| | - M Delarue
- Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Batiment 630, 91405 Orsay, France
- Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France
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85
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Ye W, Ren W, Kong L, Zhang W, Wang T. Transcriptomic Profiling Analysis of Arabidopsis thaliana Treated with Exogenous Myo-Inositol. PLoS One 2016; 11:e0161949. [PMID: 27603208 PMCID: PMC5014391 DOI: 10.1371/journal.pone.0161949] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 08/15/2016] [Indexed: 11/26/2022] Open
Abstract
Myo-insositol (MI) is a crucial substance in the growth and developmental processes in plants. It is commonly added to the culture medium to promote adventitious shoot development. In our previous work, MI was found in influencing Agrobacterium-mediated transformation. In this report, a high-throughput RNA sequencing technique (RNA-Seq) was used to investigate differently expressed genes in one-month-old Arabidopsis seedling grown on MI free or MI supplemented culture medium. The results showed that 21,288 and 21,299 genes were detected with and without MI treatment, respectively. The detected genes included 184 new genes that were not annotated in the Arabidopsis thaliana reference genome. Additionally, 183 differentially expressed genes were identified (DEGs, FDR ≤0.05, log2 FC≥1), including 93 up-regulated genes and 90 down-regulated genes. The DEGs were involved in multiple pathways, such as cell wall biosynthesis, biotic and abiotic stress response, chromosome modification, and substrate transportation. Some significantly differently expressed genes provided us with valuable information for exploring the functions of exogenous MI. RNA-Seq results showed that exogenous MI could alter gene expression and signaling transduction in plant cells. These results provided a systematic understanding of the functions of exogenous MI in detail and provided a foundation for future studies.
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Affiliation(s)
- Wenxing Ye
- Department of Grassland Science, China Agricultural University, Haidian District, Beijing, PR China
- Beijing Key Laboratory of Grassland Science, China Agricultural University, Haidian District, Beijing, PR China
| | - Weibo Ren
- Institute of Grassland Research of Chinese Academy of Agricultural Science, Saihan District, Hohhot, Inner Mongolia, PR China
| | - Lingqi Kong
- Institute of Grassland Research of Chinese Academy of Agricultural Science, Saihan District, Hohhot, Inner Mongolia, PR China
| | - Wanjun Zhang
- Department of Grassland Science, China Agricultural University, Haidian District, Beijing, PR China
- Beijing Key Laboratory of Grassland Science, China Agricultural University, Haidian District, Beijing, PR China
| | - Tao Wang
- State Key Laboratory of Agro-biotechnology, China Agricultural University, Haidian District, Beijing, PR China
- Beijing Key Laboratory of Grassland Science, China Agricultural University, Haidian District, Beijing, PR China
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86
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Zhi T, Zhou Z, Huang Y, Han C, Liu Y, Zhu Q, Ren C. Sugar suppresses cell death caused by disruption of fumarylacetoacetate hydrolase in Arabidopsis. PLANTA 2016; 244:557-571. [PMID: 27097641 DOI: 10.1007/s00425-016-2530-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 04/11/2016] [Indexed: 06/05/2023]
Abstract
Sugar negatively regulates cell death resulting from the loss of fumarylacetoacetate hydrolase that catalyzes the last step in the Tyr degradation pathway in Arabidopsis . Fumarylacetoacetate hydrolase (FAH) hydrolyzes fumarylacetoacetate to fumarate and acetoacetate, the final step in the tyrosine (Tyr) degradation pathway that is essential to animals. Previously, we first found that the Tyr degradation pathway plays an important role in plants. Mutation of the SSCD1 gene encoding FAH in Arabidopsis leads to spontaneous cell death under short-day conditions. In this study, we presented that the lethal phenotype of the short-day sensitive cell death1 (sscd1) seedlings was suppressed by sugars including sucrose, glucose, fructose, and maltose in a dose-dependent manner. Real-time quantitative PCR (RT-qPCR) analysis showed the expression of Tyr degradation pathway genes homogentisate dioxygenase and maleylacetoacetate isomerase, and sucrose-processing genes cell-wall invertase 1 and alkaline/neutral invertase G, was up-regulated in the sscd1 mutant, however, this up-regulation could be repressed by sugar. In addition, a high concentration of sugar attenuated cell death of Arabidopsis wild-type seedlings caused by treatment with exogenous succinylacetone, an abnormal metabolite resulting from the loss of FAH in the Tyr degradation pathway. These results indicated that (1) sugar could suppress cell death in sscd1, which might be because sugar supply enhances the resistance of Arabidopsis seedlings to toxic effects of succinylacetone and reduces the accumulation of Tyr degradation intermediates, resulting in suppression of cell death; and (2) sucrose-processing genes cell-wall invertase 1 and alkaline/neutral invertase G might be involved in the cell death in sscd1. Our work provides insights into the relationship between sugar and sscd1-mediated cell death, and contributes to elucidation of the regulation of cell death resulting from the loss of FAH in plants.
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Affiliation(s)
- Tiantian Zhi
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Zhou Zhou
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Yi Huang
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Chengyun Han
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
- Key Laboratory of Natural Active Pharmaceutical Constituents, College of Chemistry and Biology Engineering, Yichun University, Yichun, 336000, Jiangxi, China
| | - Yan Liu
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Qi Zhu
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Chunmei Ren
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China.
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87
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Xu Q, Guo SR, Li L, An YH, Shu S, Sun J. Proteomics analysis of compatibility and incompatibility in grafted cucumber seedlings. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2016; 105:21-28. [PMID: 27070289 DOI: 10.1016/j.plaphy.2016.04.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 03/29/2016] [Accepted: 04/01/2016] [Indexed: 05/22/2023]
Abstract
Graft compatibility between rootstock and scion is the most important factor influencing the survival of grafted plants. In this study, we used two-dimensional gel electrophoresis (2-DE) and matrix-assisted laser desorption/ionization tandem time-of-flight mass spectrometry (MALDI-TOF/TOF MS) to investigate differences in leaf proteomes of graft-compatible and graft-incompatible cucumber (Cucumis sativus L.)/pumpkin (Cucurbita L.) combinations. Cucumber seedlings were used as the scions and two pumpkin cultivars with strongly contrasting grafting compatibilities were used as the rootstocks. Non-grafted and self-grafted cucumber seedlings served as control groups. An average of approximately 500 detectable spots were observed on each 2-DE gel. A total of 50 proteins were differentially expressed in response to self-grafting, compatible-rootstock grafting, and incompatible-rootstock grafting and were all successfully identified by MALDI-TOF/TOF MS. The regulation of Calvin cycle, photosynthetic apparatus, glycolytic pathway, energy metabolism, protein biosynthesis and degradation, and reactive oxygen metabolism will probably contribute to intensify the biomass and photosynthetic capacity in graft-compatible combinations. The improved physiological and growth characteristics of compatible-rootstock grafting plants are the result of the higher expressions of proteins involved in photosynthesis, carbohydrate and energy metabolism, and protein metabolism. At the same time, the compatible-rootstock grafting regulation of stress defense, amino acid metabolism, and other metabolic functions also plays important roles in improvement of plant growth.
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Affiliation(s)
- Qing Xu
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Southern Vegetables Genetic Improvement, Ministry of Agriculture, Nanjing, 210095, PR China
| | - Shi-Rong Guo
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Southern Vegetables Genetic Improvement, Ministry of Agriculture, Nanjing, 210095, PR China
| | - Lin Li
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Southern Vegetables Genetic Improvement, Ministry of Agriculture, Nanjing, 210095, PR China
| | - Ya-Hong An
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Southern Vegetables Genetic Improvement, Ministry of Agriculture, Nanjing, 210095, PR China
| | - Sheng Shu
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Southern Vegetables Genetic Improvement, Ministry of Agriculture, Nanjing, 210095, PR China
| | - Jin Sun
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Southern Vegetables Genetic Improvement, Ministry of Agriculture, Nanjing, 210095, PR China; Institute of Facility Horticulture, Nanjing Agricultural University, Suqian, 223800, Jiangsu Province, PR China.
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88
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Waszczak C, Kerchev PI, Mühlenbock P, Hoeberichts FA, Van Der Kelen K, Mhamdi A, Willems P, Denecker J, Kumpf RP, Noctor G, Messens J, Van Breusegem F. SHORT-ROOT Deficiency Alleviates the Cell Death Phenotype of the Arabidopsis catalase2 Mutant under Photorespiration-Promoting Conditions. THE PLANT CELL 2016; 28:1844-59. [PMID: 27432873 PMCID: PMC5006698 DOI: 10.1105/tpc.16.00038] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 07/11/2016] [Indexed: 05/03/2023]
Abstract
Hydrogen peroxide (H2O2) can act as a signaling molecule that influences various aspects of plant growth and development, including stress signaling and cell death. To analyze molecular mechanisms that regulate the response to increased H2O2 levels in plant cells, we focused on the photorespiration-dependent peroxisomal H2O2 production in Arabidopsis thaliana mutants lacking CATALASE2 (CAT2) activity (cat2-2). By screening for second-site mutations that attenuate the PSII maximum efficiency (Fv'/Fm') decrease and lesion formation linked to the cat2-2 phenotype, we discovered that a mutation in SHORT-ROOT (SHR) rescued the cell death phenotype of cat2-2 plants under photorespiration-promoting conditions. SHR deficiency attenuated H2O2-dependent gene expression, oxidation of the glutathione pool, and ascorbate depletion in a cat2-2 genetic background upon exposure to photorespiratory stress. Decreased glycolate oxidase and catalase activities together with accumulation of glycolate further implied that SHR deficiency impacts the cellular redox homeostasis by limiting peroxisomal H2O2 production. The photorespiratory phenotype of cat2-2 mutants did not depend on the SHR functional interactor SCARECROW and the sugar signaling component ABSCISIC ACID INSENSITIVE4, despite the requirement for exogenous sucrose for cell death attenuation in cat2-2 shr-6 double mutants. Our findings reveal a link between SHR and photorespiratory H2O2 production that has implications for the integration of developmental and stress responses.
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Affiliation(s)
- Cezary Waszczak
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium Structural Biology Research Center, VIB, 1050 Brussels, Belgium Structural Biology Brussels Laboratory, Vrije Universiteit Brussel, 1050 Brussels, Belgium Brussels Center for Redox Biology, 1050 Brussels, Belgium Division of Plant Biology, Department of Biosciences, Viikki Plant Science Center, University of Helsinki, FI-00014 Helsinki, Finland
| | - Pavel I Kerchev
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Per Mühlenbock
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Frank A Hoeberichts
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Katrien Van Der Kelen
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Amna Mhamdi
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium Institute of Plant Sciences Paris Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, 91405 Orsay, France Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, 91405 Orsay, France
| | - Patrick Willems
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Jordi Denecker
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Robert P Kumpf
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Graham Noctor
- Institute of Plant Sciences Paris Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, 91405 Orsay, France Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, 91405 Orsay, France
| | - Joris Messens
- Structural Biology Research Center, VIB, 1050 Brussels, Belgium Structural Biology Brussels Laboratory, Vrije Universiteit Brussel, 1050 Brussels, Belgium Brussels Center for Redox Biology, 1050 Brussels, Belgium
| | - Frank Van Breusegem
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
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89
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Constitutive Overexpression of Myo-inositol-1-Phosphate Synthase Gene (GsMIPS2) from Glycine soja Confers Enhanced Salt Tolerance at Various Growth Stages in Arabidopsis. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/s1006-8104(16)30045-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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90
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Huang X, Hernick M. Recombinant expression of a functional myo-inositol-1-phosphate synthase (MIPS) in Mycobacterium smegmatis. Protein J 2016; 34:380-90. [PMID: 26420670 DOI: 10.1007/s10930-015-9632-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Myo-inositol-1-phosphate synthase (MIPS, E.C. 5.5.1.4) catalyzes the first step in inositol production-the conversion of glucose-6-phosphate (Glc-6P) to myo-inositol-1-phosphate. While the three dimensional structure of MIPS from Mycobacterium tuberculosis has been solved, biochemical studies examining the in vitro activity have not been reported to date. Herein we report the in vitro activity of mycobacterial MIPS expressed in E. coli and Mycobacterium smegmatis. Recombinant expression in E. coli yields a soluble protein capable of binding the NAD(+) cofactor; however, it has no significant activity with the Glc-6P substrate. In contrast, recombinant expression in M. smegmatis mc(2)4517 yields a functionally active protein. Examination of structural data suggests that MtMIPS expressed in E. coli adopts a fold that is missing a key helix containing two critical (conserved) Lys side chains, which likely explains the inability of the E. coli expressed protein to bind and turnover the Glc-6P substrate. Recombinant expression in M. smegmatis may yield a protein that adopts a fold in which this key helix is formed enabling proper positioning of important side chains, thereby allowing for Glc-6P substrate binding and turnover. Detailed mechanistic studies may be feasible following optimization of the recombinant MIPS expression protocol in M. smegmatis.
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Affiliation(s)
- Xinyi Huang
- Department of Biochemistry, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Marcy Hernick
- Department of Biochemistry, Virginia Tech, Blacksburg, VA, 24061, USA. .,Department of Pharmaceutical Sciences, Appalachian College of Pharmacy, Oakwood, VA, 24631, USA.
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91
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Mauve C, Khlifi S, Gilard F, Mouille G, Farjon J. Sensitive, highly resolved, and quantitative (1)H-(13)C NMR data in one go for tracking metabolites in vegetal extracts. Chem Commun (Camb) 2016; 52:6142-5. [PMID: 27074265 DOI: 10.1039/c6cc01783e] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The quantification of metabolites is essential for understanding and improving biological systems. With the aim to quantify in one map a complex mixture composed of low concentrated metabolites, a new experiment called the (1)H-(13)C QUIPU HSQC allows improving of both resolution and sensitivity for investigation of vegetal extracts.
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Affiliation(s)
- Caroline Mauve
- Plateforme Métabolisme-Métabolome, Institute of Plant Sciences Paris Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Paris Diderot, Sorbonne Paris-Cité, bât 630, 91405 Orsay, France
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92
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Ma L, Tian T, Lin R, Deng XW, Wang H, Li G. Arabidopsis FHY3 and FAR1 Regulate Light-Induced myo-Inositol Biosynthesis and Oxidative Stress Responses by Transcriptional Activation of MIPS1. MOLECULAR PLANT 2016; 9:541-57. [PMID: 26714049 DOI: 10.1016/j.molp.2015.12.013] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 11/07/2015] [Accepted: 12/14/2015] [Indexed: 05/25/2023]
Abstract
myo-Inositol-1-phosphate synthase (MIPS) catalyzes the limiting step of inositol biosynthesis and has crucial roles in plant growth and development. In response to stress, the transcription of MIPS1 is induced and the biosynthesis of inositol or inositol derivatives is promoted by unknown mechanisms. Here, we found that the light signaling protein FAR-RED ELONGATED HYPOCOTYL3 (FHY3) and its homolog FAR-RED IMPAIRED RESPONSE1 (FAR1) regulate light-induced inositol biosynthesis and oxidative stress responses by activating the transcription of MIPS1. Disruption of FHY3 and FAR1 caused light-induced cell death after dark-light transition, precocious leaf senescence, and increased sensitivity to oxidative stress. Reduction of salicylic acid (SA) accumulation by overexpression of SALICYLIC ACID 3-HYDROXYLASE largely suppressed the cell death phenotype of fhy3 far1 mutant plants, suggesting that FHY3- and FAR1-mediated cell death is dependent on SA. Furthermore, comparative analysis of chromatin immunoprecipitation sequencing and microarray results revealed that FHY3 and FAR1 directly target both MIPS1 and MIPS2. The fhy3 far1 mutant plants showed severely decreased MIPS1/2 transcript levels and reduced inositol levels. Conversely, constitutive expression of MIPS1 partially rescued the inositol contents, caused reduced transcript levels of SA-biosynthesis genes, and prevented oxidative stress in fhy3 far1. Taken together, our results indicate that the light signaling proteins FHY3 and FAR1 directly bind the promoter of MIPS1 to activate its expression and thereby promote inositol biosynthesis to prevent light-induced oxidative stress and SA-dependent cell death.
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Affiliation(s)
- Lin Ma
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Tian Tian
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Rongcheng Lin
- Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Science, Beijing 100093, China
| | - Xing-Wang Deng
- National Laboratory of Protein and Plant Gene Research, Peking-Yale Joint Center for Plant Molecular Genetics and Agro-Biotechnology, Peking-Tsinghua Center for Life Sciences, College of Life Sciences, Peking University, Beijing 100871, China
| | - Haiyang Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Gang Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China.
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93
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Bruggeman Q, Mazubert C, Prunier F, Lugan R, Chan KX, Phua SY, Pogson BJ, Krieger-Liszkay A, Delarue M, Benhamed M, Bergounioux C, Raynaud C. Chloroplast Activity and 3'phosphadenosine 5'phosphate Signaling Regulate Programmed Cell Death in Arabidopsis. PLANT PHYSIOLOGY 2016; 170:1745-56. [PMID: 26747283 PMCID: PMC4775142 DOI: 10.1104/pp.15.01872] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 01/05/2016] [Indexed: 05/21/2023]
Abstract
Programmed cell death (PCD) is a crucial process both for plant development and responses to biotic and abiotic stress. There is accumulating evidence that chloroplasts may play a central role during plant PCD as for mitochondria in animal cells, but it is still unclear whether they participate in PCD onset, execution, or both. To tackle this question, we have analyzed the contribution of chloroplast function to the cell death phenotype of the myoinositol phosphate synthase1 (mips1) mutant that forms spontaneous lesions in a light-dependent manner. We show that photosynthetically active chloroplasts are required for PCD to occur in mips1, but this process is independent of the redox state of the chloroplast. Systematic genetic analyses with retrograde signaling mutants reveal that 3'-phosphoadenosine 5'-phosphate, a chloroplast retrograde signal that modulates nuclear gene expression in response to stress, can inhibit cell death and compromises plant innate immunity via inhibition of the RNA-processing 5'-3' exoribonucleases. Our results provide evidence for the role of chloroplast-derived signal and RNA metabolism in the control of cell death and biotic stress response.
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Affiliation(s)
- Quentin Bruggeman
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Christelle Mazubert
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Florence Prunier
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Raphaël Lugan
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Kai Xun Chan
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Su Yin Phua
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Barry James Pogson
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Anja Krieger-Liszkay
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Marianne Delarue
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Moussa Benhamed
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Catherine Bergounioux
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Cécile Raynaud
- Institute of Plant Sciences Paris-Saclay (IPS2), UMR 9213/UMR1403, CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France (Q.B., C.M., F.P., M.D., M.B., C.B., C.R.);Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg cedex, France (R.L.);Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National University, Acton, Australian Capital Territory 2601, Australia (K.X.C., S.Y.P., B.J.P.);Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique et aux Energies Alternatives Saclay, Centre National de la Recherche Scientifique, Université Paris-Sud, F-91191 Gif-sur-Yvette cedex, France (A.K.-L.); and Division of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
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94
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Zhang S, Yang W, Zhao Q, Zhou X, Jiang L, Ma S, Liu X, Li Y, Zhang C, Fan Y, Chen R. Analysis of weighted co-regulatory networks in maize provides insights into new genes and regulatory mechanisms related to inositol phosphate metabolism. BMC Genomics 2016; 17:129. [PMID: 26911482 PMCID: PMC4765147 DOI: 10.1186/s12864-016-2476-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 02/16/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND D-myo-inositol phosphates (IPs) are a series of phosphate esters. Myo-inositol hexakisphosphate (phytic acid, IP6) is the most abundant IP and has negative effects on animal and human nutrition. IPs play important roles in plant development, stress responses, and signal transduction. However, the metabolic pathways and possible regulatory mechanisms of IPs in maize are unclear. In this study, the B73 (high in phytic acid) and Qi319 (low in phytic acid) lines were selected for RNA-Seq analysis from 427 inbred lines based on a screening of IP levels. By integrating the metabolite data with the RNA-Seq data at three different kernel developmental stages (12, 21 and 30 days after pollination), co-regulatory networks were constructed to explore IP metabolism and its interactions with other pathways. RESULTS Differentially expressed gene analyses showed that the expression of MIPS and ITPK was related to differences in IP metabolism in Qi319 and B73. Moreover, WRKY and ethylene-responsive transcription factors (TFs) were common among the differentially expressed TFs, and are likely to be involved in the regulation of IP metabolism. Six co-regulatory networks were constructed, and three were chosen for further analysis. Based on network analyses, we proposed that the GA pathway interacts with the IP pathway through the ubiquitination pathway, and that Ca(2+) signaling functions as a bridge between IPs and other pathways. IP pools were found to be transported by specific ATP-binding cassette (ABC) transporters. Finally, three candidate genes (Mf3, DH2 and CB5) were identified and validated using Arabidopsis lines with mutations in orthologous genes or RNA interference (RNAi)-transgenic maize lines. Some mutant or RNAi lines exhibited seeds with a low-phytic-acid phenotype, indicating perturbation of IP metabolism. Mf3 likely encodes an enzyme involved in IP synthesis, DH2 encodes a transporter responsible for IP transport across organs and CB5 encodes a transporter involved in IP co-transport into vesicles. CONCLUSIONS This study provides new insights into IP metabolism and regulation, and facilitates our development of a better understanding of the functions of IPs and how they interact with other pathways involved in plant development and stress responses. Three new genes were discovered and preliminarily validated, thereby increasing our knowledge of IP metabolism.
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Affiliation(s)
- Shaojun Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 100081, Beijing, China.
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), 100081, Beijing, China.
| | - Wenzhu Yang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 100081, Beijing, China.
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), 100081, Beijing, China.
| | - Qianqian Zhao
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 100081, Beijing, China.
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), 100081, Beijing, China.
| | - Xiaojin Zhou
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 100081, Beijing, China.
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), 100081, Beijing, China.
| | - Ling Jiang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 100081, Beijing, China.
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), 100081, Beijing, China.
| | - Shuai Ma
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 100081, Beijing, China.
| | - Xiaoqing Liu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 100081, Beijing, China.
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), 100081, Beijing, China.
| | - Ye Li
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 100081, Beijing, China.
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), 100081, Beijing, China.
| | - Chunyi Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 100081, Beijing, China.
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), 100081, Beijing, China.
| | - Yunliu Fan
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 100081, Beijing, China.
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), 100081, Beijing, China.
| | - Rumei Chen
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, 100081, Beijing, China.
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), 100081, Beijing, China.
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95
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Lytvyn DI, Raynaud C, Yemets AI, Bergounioux C, Blume YB. Involvement of Inositol Biosynthesis and Nitric Oxide in the Mediation of UV-B Induced Oxidative Stress. FRONTIERS IN PLANT SCIENCE 2016; 7:430. [PMID: 27148278 PMCID: PMC4828445 DOI: 10.3389/fpls.2016.00430] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 03/18/2016] [Indexed: 05/12/2023]
Abstract
The involvement of NO-signaling in ultraviolet B (UV-B) induced oxidative stress (OS) in plants is an open question. Inositol biosynthesis contributes to numerous cellular functions, including the regulation of plants tolerance to stress. This work reveals the involvement of inositol-3-phosphate synthase 1 (IPS1), a key enzyme for biosynthesis of myo-inositol and its derivatives, in the response to NO-dependent OS in Arabidopsis. Homozygous mutants deficient for IPS1 (atips1) and wild-type plants were transformed with a reduction- grx1-rogfp2 and used for the dynamic measurement of UV-B-induced and SNP (sodium nitroprusside)-mediated oxidative stresses by confocal microscopy. atips1 mutants displayed greater tissue-specific resistance to the action of UV-B than the wild type. SNP can act both as an oxidant or repairer depending on the applied concentration, but mutant plants were more tolerant than the wild type to nitrosative effects of high concentration of SNP. Additionally, pretreatment with low concentrations of SNP (10, 100 μM) before UV-B irradiation resulted in a tissue-specific protective effect that was enhanced in atips1. We conclude that the interplay between nitric oxide and inositol signaling can be involved in the mediation of UV-B-initiated oxidative stress in the plant cell.
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Affiliation(s)
- Dmytro I. Lytvyn
- Department of Genomics and Molecular Biotechnology, Institute of Food Biotechnology and Genomics, National Academy of Sciences of UkraineKyiv, Ukraine
- *Correspondence: Dmytro I. Lytvyn,
| | - Cécile Raynaud
- Laboratory of Cell Cycle Chromatin and Development, Institute of Plant Sciences Paris-Saclay IPS2, CNRS 9213, INRA 1403, Université Paris-Sud, Université Evry Val d’Essonne, Université Paris Diderot, Sorbonne Paris-Cite, Universite Paris-SaclayOrsay, France
| | - Alla I. Yemets
- Department of Genomics and Molecular Biotechnology, Institute of Food Biotechnology and Genomics, National Academy of Sciences of UkraineKyiv, Ukraine
| | - Catherine Bergounioux
- Laboratory of Cell Cycle Chromatin and Development, Institute of Plant Sciences Paris-Saclay IPS2, CNRS 9213, INRA 1403, Université Paris-Sud, Université Evry Val d’Essonne, Université Paris Diderot, Sorbonne Paris-Cite, Universite Paris-SaclayOrsay, France
| | - Yaroslav B. Blume
- Department of Genomics and Molecular Biotechnology, Institute of Food Biotechnology and Genomics, National Academy of Sciences of UkraineKyiv, Ukraine
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96
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Redekar NR, Biyashev RM, Jensen RV, Helm RF, Grabau EA, Maroof MAS. Genome-wide transcriptome analyses of developing seeds from low and normal phytic acid soybean lines. BMC Genomics 2015; 16:1074. [PMID: 26678836 PMCID: PMC4683714 DOI: 10.1186/s12864-015-2283-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Accepted: 12/10/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Low phytic acid (lpa) crops are potentially eco-friendly alternative to conventional normal phytic acid (PA) crops, improving mineral bioavailability in monogastric animals as well as decreasing phosphate pollution. The lpa crops developed to date carry mutations that are directly or indirectly associated with PA biosynthesis and accumulation during seed development. These lpa crops typically exhibit altered carbohydrate profiles, increased free phosphate, and lower seedling emergence, the latter of which reduces overall crop yield, hence limiting their large-scale cultivation. Improving lpa crop yield requires an understanding of the downstream effects of the lpa genotype on seed development. Towards that end, we present a comprehensive comparison of gene-expression profiles between lpa and normal PA soybean lines (Glycine max) at five stages of seed development using RNA-Seq approaches. The lpa line used in this study carries single point mutations in a myo-inositol phosphate synthase gene along with two multidrug-resistance protein ABC transporter genes. RESULTS RNA sequencing data of lpa and normal PA soybean lines from five seed-developmental stages (total of 30 libraries) were used for differential expression and functional enrichment analyses. A total of 4235 differentially expressed genes, including 512-transcription factor genes were identified. Eighteen biological processes such as apoptosis, glucan metabolism, cellular transport, photosynthesis and 9 transcription factor families including WRKY, CAMTA3 and SNF2 were enriched during seed development. Genes associated with apoptosis, glucan metabolism, and cellular transport showed enhanced expression in early stages of lpa seed development, while those associated with photosynthesis showed decreased expression in late developmental stages. The results suggest that lpa-causing mutations play a role in inducing and suppressing plant defense responses during early and late stages of seed development, respectively. CONCLUSIONS This study provides a global perspective of transcriptomal changes during soybean seed development in an lpa mutant. The mutants are characterized by earlier expression of genes associated with cell wall biosynthesis and a decrease in photosynthetic genes in late stages. The biological processes and transcription factors identified in this study are signatures of lpa-causing mutations.
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Affiliation(s)
- Neelam R Redekar
- Department of Crop and Soil Environmental Sciences, Virginia Tech, 185 AgQuad Lane, 24061, Blacksburg, VA, USA.
| | - Ruslan M Biyashev
- Department of Crop and Soil Environmental Sciences, Virginia Tech, 185 AgQuad Lane, 24061, Blacksburg, VA, USA.
| | - Roderick V Jensen
- Department of Biological Sciences, Virginia Tech, Life Science I building, 24061, Blacksburg, VA, USA.
| | - Richard F Helm
- Department of Biochemistry, Virginia Tech, Life Science I building, 24061, Blacksburg, VA, USA.
| | - Elizabeth A Grabau
- Department of Plant Pathology, Physiology, and Weed Science, Virginia Tech, Price Hall, 24061, Blacksburg, VA, USA.
| | - M A Saghai Maroof
- Department of Crop and Soil Environmental Sciences, Virginia Tech, 185 AgQuad Lane, 24061, Blacksburg, VA, USA.
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97
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Sparvoli F, Cominelli E. Seed Biofortification and Phytic Acid Reduction: A Conflict of Interest for the Plant? PLANTS 2015; 4:728-55. [PMID: 27135349 PMCID: PMC4844270 DOI: 10.3390/plants4040728] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 11/13/2015] [Indexed: 02/03/2023]
Abstract
Most of the phosphorus in seeds is accumulated in the form of phytic acid (myo-inositol-1,2,3,4,5,6-hexakisphosphate, InsP6). This molecule is a strong chelator of cations important for nutrition, such as iron, zinc, magnesium, and calcium. For this reason, InsP6 is considered an antinutritional factor. In recent years, efforts to biofortify seeds through the generation of low phytic acid (lpa) mutants have been noteworthy. Moreover, genes involved in the biosynthesis and accumulation of this molecule have been isolated and characterized in different species. Beyond its role in phosphorus storage, phytic acid is a very important signaling molecule involved in different regulatory processes during plant development and responses to different stimuli. Consequently, many lpa mutants show different negative pleitotropic effects. The strength of these pleiotropic effects depends on the specific mutated gene, possible functional redundancy, the nature of the mutation, and the spatio-temporal expression of the gene. Breeding programs or transgenic approaches aimed at development of new lpa mutants must take into consideration these different aspects in order to maximize the utility of these mutants.
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Affiliation(s)
- Francesca Sparvoli
- Institute of Agricultural Biology and Biotechnology, CNR, Via Bassini 15, 20133 Milan, Italy.
| | - Eleonora Cominelli
- Institute of Agricultural Biology and Biotechnology, CNR, Via Bassini 15, 20133 Milan, Italy.
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98
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Magnin-Robert M, Le Bourse D, Markham J, Dorey S, Clément C, Baillieul F, Dhondt-Cordelier S. Modifications of Sphingolipid Content Affect Tolerance to Hemibiotrophic and Necrotrophic Pathogens by Modulating Plant Defense Responses in Arabidopsis. PLANT PHYSIOLOGY 2015; 169:2255-74. [PMID: 26378098 PMCID: PMC4634087 DOI: 10.1104/pp.15.01126] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 09/11/2015] [Indexed: 05/22/2023]
Abstract
Sphingolipids are emerging as second messengers in programmed cell death and plant defense mechanisms. However, their role in plant defense is far from being understood, especially against necrotrophic pathogens. Sphingolipidomics and plant defense responses during pathogenic infection were evaluated in the mutant of long-chain base phosphate (LCB-P) lyase, encoded by the dihydrosphingosine-1-phosphate lyase1 (AtDPL1) gene and regulating long-chain base/LCB-P homeostasis. Atdpl1 mutants exhibit tolerance to the necrotrophic fungus Botrytis cinerea but susceptibility to the hemibiotrophic bacterium Pseudomonas syringae pv tomato (Pst). Here, a direct comparison of sphingolipid profiles in Arabidopsis (Arabidopsis thaliana) during infection with pathogens differing in lifestyles is described. In contrast to long-chain bases (dihydrosphingosine [d18:0] and 4,8-sphingadienine [d18:2]), hydroxyceramide and LCB-P (phytosphingosine-1-phosphate [t18:0-P] and 4-hydroxy-8-sphingenine-1-phosphate [t18:1-P]) levels are higher in Atdpl1-1 than in wild-type plants in response to B. cinerea. Following Pst infection, t18:0-P accumulates more strongly in Atdpl1-1 than in wild-type plants. Moreover, d18:0 and t18:0-P appear as key players in Pst- and B. cinerea-induced cell death and reactive oxygen species accumulation. Salicylic acid levels are similar in both types of plants, independent of the pathogen. In addition, salicylic acid-dependent gene expression is similar in both types of B. cinerea-infected plants but is repressed in Atdpl1-1 after treatment with Pst. Infection with both pathogens triggers higher jasmonic acid, jasmonoyl-isoleucine accumulation, and jasmonic acid-dependent gene expression in Atdpl1-1 mutants. Our results demonstrate that sphingolipids play an important role in plant defense, especially toward necrotrophic pathogens, and highlight a novel connection between the jasmonate signaling pathway, cell death, and sphingolipids.
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Affiliation(s)
- Maryline Magnin-Robert
- Unité de Recherche Vigne et Vin de Champagne Equipe d'Accueil 4707, Laboratoire Stress Défenses et Reproduction des Plantes, Structure Fédérative de Recherche Condorcet Fédération de Recherche, Centre National de la Recherche Scientifique 3417, Université de Reims Champagne-Ardenne, F-51687 Reims cedex 2, France (M.M.-R., S.D., C.C., F.B., S.D.-C.); andCenter for Plant Science Innovation and Department of Biochemistry, University of Nebraska, Lincoln, Nebraska 68588 (D.L.B., J.M.)
| | - Doriane Le Bourse
- Unité de Recherche Vigne et Vin de Champagne Equipe d'Accueil 4707, Laboratoire Stress Défenses et Reproduction des Plantes, Structure Fédérative de Recherche Condorcet Fédération de Recherche, Centre National de la Recherche Scientifique 3417, Université de Reims Champagne-Ardenne, F-51687 Reims cedex 2, France (M.M.-R., S.D., C.C., F.B., S.D.-C.); andCenter for Plant Science Innovation and Department of Biochemistry, University of Nebraska, Lincoln, Nebraska 68588 (D.L.B., J.M.)
| | - Jonathan Markham
- Unité de Recherche Vigne et Vin de Champagne Equipe d'Accueil 4707, Laboratoire Stress Défenses et Reproduction des Plantes, Structure Fédérative de Recherche Condorcet Fédération de Recherche, Centre National de la Recherche Scientifique 3417, Université de Reims Champagne-Ardenne, F-51687 Reims cedex 2, France (M.M.-R., S.D., C.C., F.B., S.D.-C.); andCenter for Plant Science Innovation and Department of Biochemistry, University of Nebraska, Lincoln, Nebraska 68588 (D.L.B., J.M.)
| | - Stéphan Dorey
- Unité de Recherche Vigne et Vin de Champagne Equipe d'Accueil 4707, Laboratoire Stress Défenses et Reproduction des Plantes, Structure Fédérative de Recherche Condorcet Fédération de Recherche, Centre National de la Recherche Scientifique 3417, Université de Reims Champagne-Ardenne, F-51687 Reims cedex 2, France (M.M.-R., S.D., C.C., F.B., S.D.-C.); andCenter for Plant Science Innovation and Department of Biochemistry, University of Nebraska, Lincoln, Nebraska 68588 (D.L.B., J.M.)
| | - Christophe Clément
- Unité de Recherche Vigne et Vin de Champagne Equipe d'Accueil 4707, Laboratoire Stress Défenses et Reproduction des Plantes, Structure Fédérative de Recherche Condorcet Fédération de Recherche, Centre National de la Recherche Scientifique 3417, Université de Reims Champagne-Ardenne, F-51687 Reims cedex 2, France (M.M.-R., S.D., C.C., F.B., S.D.-C.); andCenter for Plant Science Innovation and Department of Biochemistry, University of Nebraska, Lincoln, Nebraska 68588 (D.L.B., J.M.)
| | - Fabienne Baillieul
- Unité de Recherche Vigne et Vin de Champagne Equipe d'Accueil 4707, Laboratoire Stress Défenses et Reproduction des Plantes, Structure Fédérative de Recherche Condorcet Fédération de Recherche, Centre National de la Recherche Scientifique 3417, Université de Reims Champagne-Ardenne, F-51687 Reims cedex 2, France (M.M.-R., S.D., C.C., F.B., S.D.-C.); andCenter for Plant Science Innovation and Department of Biochemistry, University of Nebraska, Lincoln, Nebraska 68588 (D.L.B., J.M.)
| | - Sandrine Dhondt-Cordelier
- Unité de Recherche Vigne et Vin de Champagne Equipe d'Accueil 4707, Laboratoire Stress Défenses et Reproduction des Plantes, Structure Fédérative de Recherche Condorcet Fédération de Recherche, Centre National de la Recherche Scientifique 3417, Université de Reims Champagne-Ardenne, F-51687 Reims cedex 2, France (M.M.-R., S.D., C.C., F.B., S.D.-C.); andCenter for Plant Science Innovation and Department of Biochemistry, University of Nebraska, Lincoln, Nebraska 68588 (D.L.B., J.M.)
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99
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Bac-Molenaar JA, Fradin EF, Becker FFM, Rienstra JA, van der Schoot J, Vreugdenhil D, Keurentjes JJB. Genome-Wide Association Mapping of Fertility Reduction upon Heat Stress Reveals Developmental Stage-Specific QTLs in Arabidopsis thaliana. THE PLANT CELL 2015; 27:1857-74. [PMID: 26163573 PMCID: PMC4531356 DOI: 10.1105/tpc.15.00248] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 06/16/2015] [Indexed: 05/09/2023]
Abstract
For crops that are grown for their fruits or seeds, elevated temperatures that occur during flowering and seed or fruit set have a stronger effect on yield than high temperatures during the vegetative stage. Even short-term exposure to heat can have a large impact on yield. In this study, we used Arabidopsis thaliana to study the effect of short-term heat exposure on flower and seed development. The impact of a single hot day (35°C) was determined in more than 250 natural accessions by measuring the lengths of the siliques along the main inflorescence. Two sensitive developmental stages were identified, one before anthesis, during male and female meiosis, and one after anthesis, during fertilization and early embryo development. In addition, we observed a correlation between flowering time and heat tolerance. Genome-wide association mapping revealed four quantitative trait loci (QTLs) strongly associated with the heat response. These QTLs were developmental stage specific, as different QTLs were detected before and after anthesis. For a number of QTLs, T-DNA insertion knockout lines could validate assigned candidate genes. Our findings show that the regulation of complex traits can be highly dependent on the developmental timing.
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Affiliation(s)
- Johanna A Bac-Molenaar
- Laboratory of Plant Physiology, Wageningen University, 6708 PB Wageningen, The Netherlands Laboratory of Genetics, Wageningen University, 6708 PB Wageningen, The Netherlands
| | - Emilie F Fradin
- Laboratory of Plant Physiology, Wageningen University, 6708 PB Wageningen, The Netherlands Laboratory of Genetics, Wageningen University, 6708 PB Wageningen, The Netherlands
| | - Frank F M Becker
- Laboratory of Genetics, Wageningen University, 6708 PB Wageningen, The Netherlands
| | - Juriaan A Rienstra
- Laboratory of Plant Physiology, Wageningen University, 6708 PB Wageningen, The Netherlands
| | - J van der Schoot
- Laboratory of Plant Physiology, Wageningen University, 6708 PB Wageningen, The Netherlands
| | - Dick Vreugdenhil
- Laboratory of Plant Physiology, Wageningen University, 6708 PB Wageningen, The Netherlands
| | - Joost J B Keurentjes
- Laboratory of Genetics, Wageningen University, 6708 PB Wageningen, The Netherlands
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100
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Bruggeman Q, Prunier F, Mazubert C, de Bont L, Garmier M, Lugan R, Benhamed M, Bergounioux C, Raynaud C, Delarue M. Involvement of Arabidopsis Hexokinase1 in Cell Death Mediated by Myo-Inositol Accumulation. THE PLANT CELL 2015; 27:1801-14. [PMID: 26048869 PMCID: PMC4498202 DOI: 10.1105/tpc.15.00068] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 05/18/2015] [Indexed: 05/05/2023]
Abstract
Programmed cell death (PCD) is essential for several aspects of plant life, including development and stress responses. We recently identified the mips1 mutant of Arabidopsis thaliana, which is deficient for the enzyme catalyzing the limiting step of myo-inositol (MI) synthesis. One of the most striking features of mips1 is the light-dependent formation of lesions on leaves due to salicylic acid (SA)-dependent PCD. Here, we identified a suppressor of PCD by screening for mutations that abolish the mips1 cell death phenotype. Our screen identified the hxk1 mutant, mutated in the gene encoding the hexokinase1 (HXK1) enzyme that catalyzes sugar phosphorylation and acts as a genuine glucose sensor. We show that HXK1 is required for lesion formation in mips1 due to alterations in MI content, via SA-dependant signaling. Using two catalytically inactive HXK1 mutants, we also show that hexokinase catalytic activity is necessary for the establishment of lesions in mips1. Gas chromatography-mass spectrometry analyses revealed a restoration of the MI content in mips1 hxk1 that it is due to the activity of the MIPS2 isoform, while MIPS3 is not involved. Our work defines a pathway of HXK1-mediated cell death in plants and demonstrates that two MIPS enzymes act cooperatively under a particular metabolic status, highlighting a novel checkpoint of MI homeostasis in plants.
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Affiliation(s)
- Quentin Bruggeman
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Florence Prunier
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Christelle Mazubert
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Linda de Bont
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Marie Garmier
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Raphaël Lugan
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 67084 Strasbourg Cedex, France
| | - Moussa Benhamed
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France Division of Biological and Environmental Sciences and Engineering, Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Catherine Bergounioux
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Cécile Raynaud
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Marianne Delarue
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
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