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Huang JQ, Lin JL, Guo XX, Tian X, Tian Y, Shangguan XX, Wang LJ, Fang X, Chen XY. RES transformation for biosynthesis and detoxification. SCIENCE CHINA-LIFE SCIENCES 2020; 63:1297-1302. [PMID: 32519031 DOI: 10.1007/s11427-020-1729-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 05/09/2020] [Indexed: 12/25/2022]
Abstract
The reactive electrophilic species (RES), typically the molecules bearing α,β-unsaturated carbonyl group, are widespread in living organisms and notoriously known for their damaging effects. Many of the mycotoxins released from phytopathogenic fungi are RES and their contamination to cereals threatens food safety worldwide. However, due to their high reactivity, RES are also used by host organisms to synthesize specific metabolites. The evolutionary conserved glyoxalase (GLX) system scavenges the cytotoxic α-oxoaldehydes that bear RES groups, which cause host disorders and diseases. In cotton, a specialized enzyme derived from glyoxalase I (GLXI) through gene duplications and named as specialized GLXI (SPG), acts as a distinct type of aromatase in the gossypol pathway to transform the RES intermediates into the phenolic products. In this review, we briefly introduce the research progress in understanding the RES, especially the RES-type mycotoxins, the GLX system and SPG, and discuss their application potential in detoxification and synthetic biology.
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Affiliation(s)
- Jin-Quan Huang
- State Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, University of CAS, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Jia-Ling Lin
- State Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, University of CAS, Chinese Academy of Sciences, Shanghai, 200032, China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, 200031, China
| | - Xiao-Xiang Guo
- State Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, University of CAS, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Xiu Tian
- State Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, University of CAS, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Ye Tian
- SIBS-UGENT-SJTU Joint Laboratory of Mycotoxin Research, CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Xiao-Xia Shangguan
- State Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, University of CAS, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Ling-Jian Wang
- State Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, University of CAS, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Xin Fang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China.
| | - Xiao-Ya Chen
- State Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, University of CAS, Chinese Academy of Sciences, Shanghai, 200032, China. .,School of Life Science and Technology, ShanghaiTech University, Shanghai, 200031, China. .,Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Botanical Garden, Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, Shanghai, 201602, China.
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Al-Zahrani W, Bafeel SO, El-Zohri M. Jasmonates mediate plant defense responses to Spodoptera exigua herbivory in tomato and maize foliage. PLANT SIGNALING & BEHAVIOR 2020; 15:1746898. [PMID: 32290765 PMCID: PMC7238883 DOI: 10.1080/15592324.2020.1746898] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Plants evolve diverse strategies to cope with herbivorous insects, in which the lipid-derived phytohormone jasmonic acid (JA) plays a crucial role. This study was conducted to investigate the differential responses of tomato and maize plants to Spodoptera exiguaherbivory and to clarify the role played by JA, methyl-jasmonate (MeJA) and jasmonoyl-L-isoleucine (JA-L-Ile) in their defense responses. JA, MeJA and JA-L-Ile were quantified using HPLC-MS/MS. The results showed that maize plant was more tolerant toS. exiguaherbivory than tomato. Spodopteraexigua attack induced JA, MeJA, and JA-L-Ile to high levels after 2 h of infestation in both test plants. Then, all studied JAsconcentration decreased gradually by increasing infestation time up to 1 week. JA concentration in infested maize was much higher than that in infested tomato leaves. However, MeJA concentration in infested tomato leaves was higher than that in maize. In control plants, JA was not recorded, while MeJA was recorded in comparable values both in tomato and maize. Our results showed that JA plays the main role in increasing defense responses to S. exigua infestation in the studied plants as a direct signaling molecule; however, MeJA could play an indirect role by inducing JA accumulation. JA-L-Ile indicated a less efficient role in defense responses to S. exigua attack in both test plants where its level is much lower than JA and MeJA.
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Affiliation(s)
- Wafaa Al-Zahrani
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sameera O. Bafeel
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Manal El-Zohri
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Botany and Microbiology, Faculty of Science, Assiut University, Assiut, Egypt
- CONTACT Manal El-Zohri Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
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53
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Maurya R, Srivastava D, Singh M, Sawant SV. Envisioning the immune interactome in Arabidopsis. FUNCTIONAL PLANT BIOLOGY : FPB 2020; 47:486-507. [PMID: 32345431 DOI: 10.1071/fp19188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 01/13/2020] [Indexed: 06/11/2023]
Abstract
During plant-pathogen interaction, immune targets were regulated by protein-protein interaction events such as ligand-receptor/co-receptor, kinase-substrate, protein sequestration, activation or repression via post-translational modification and homo/oligo/hetro-dimerisation of proteins. A judicious use of molecular machinery requires coordinated protein interaction among defence components. Immune signalling in Arabidopsis can be broadly represented in successive or simultaneous steps; pathogen recognition at cell surface, Ca2+ and reactive oxygen species signalling, MAPK signalling, post-translational modification, transcriptional regulation and phyto-hormone signalling. Proteome wide interaction studies have shown the existence of interaction hubs associated with physiological function. So far, a number of protein interaction events regulating immune targets have been identified, but their understanding in an interactome view is lacking. We focussed specifically on the integration of protein interaction signalling in context to plant-pathogenesis and identified the key targets. The present review focuses towards a comprehensive view of the plant immune interactome including signal perception, progression, integration and physiological response during plant pathogen interaction.
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Affiliation(s)
- Rashmi Maurya
- Plant Molecular Biology Lab, National Botanical Research Institute, Lucknow. 226001; and Department of Botany, Lucknow University, Lucknow. 226007
| | - Deepti Srivastava
- Integral Institute of Agricultural Science and Technology (IIAST) Integral University, Kursi Road, Dashauli, Uttar Pradesh. 226026
| | - Munna Singh
- Department of Botany, Lucknow University, Lucknow. 226007
| | - Samir V Sawant
- Plant Molecular Biology Lab, National Botanical Research Institute, Lucknow. 226001; and Corresponding author.
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Gorman Z, Christensen SA, Yan Y, He Y, Borrego E, Kolomiets MV. Green leaf volatiles and jasmonic acid enhance susceptibility to anthracnose diseases caused by Colletotrichum graminicola in maize. MOLECULAR PLANT PATHOLOGY 2020; 21:702-715. [PMID: 32105380 PMCID: PMC7170777 DOI: 10.1111/mpp.12924] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 01/08/2020] [Accepted: 01/28/2020] [Indexed: 05/20/2023]
Abstract
Colletotrichum graminicola is a hemibiotrophic fungus that causes anthracnose leaf blight (ALB) and anthracnose stalk rot (ASR) in maize. Despite substantial economic losses caused by these diseases, the defence mechanisms against this pathogen remain poorly understood. Several hormones are suggested to aid in defence against C. graminicola, such as jasmonic acid (JA) and salicylic acid (SA), but supporting genetic evidence was not reported. Green leaf volatiles (GLVs) are a group of well-characterized volatiles that induce JA biosynthesis in maize and are known to function in defence against necrotrophic pathogens. Information regarding the role of GLVs and JA in interactions with (hemi)biotrophic pathogens remains limited. To functionally elucidate GLVs and JA in defence against a hemibiotrophic pathogen, we tested GLV- and JA-deficient mutants, lox10 and opr7 opr8, respectively, for resistance to ASR and ALB and profiled jasmonates and SA in their stalks and leaves throughout infection. Both mutants were resistant and generally displayed elevated levels of SA and low amounts of jasmonates, especially at early stages of infection. Pretreatment with GLVs restored susceptibility of lox10 mutants, but not opr7 opr8 mutants, which coincided with complete rescue of JA levels. Exogenous methyl jasmonate restored susceptibility in both mutants when applied before inoculation, whereas methyl salicylate did not induce further resistance in either of the mutants, but did induce mutant-like resistance in the wild type. Collectively, this study reveals that GLVs and JA contribute to maize susceptibility to C. graminicola due to suppression of SA-related defences.
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Affiliation(s)
- Zachary Gorman
- Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationTXUSA
| | - Shawn A. Christensen
- Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationTXUSA
- Department of Agriculture–Agricultural Research Service (USDA–ARS), Chemistry Research UnitCenter for Medical, Agricultural, and Veterinary EntomologyGainesvilleFLUSA
| | - Yuanxin Yan
- Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationTXUSA
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjingChina
| | - Yongming He
- Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationTXUSA
- Jiangxi Key Laboratory of Crop Physiology, Ecology, and Genetic BreedingJiangxi Agricultural UniversityNanchangChina
| | - Eli Borrego
- Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationTXUSA
- Thomas H. Gosnell School of Life SciencesRochester Institute of TechnologyRochesterNYUSA
| | - Michael V. Kolomiets
- Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationTXUSA
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55
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Scalschi L, Llorens E, García-Agustín P, Vicedo B. Role of Jasmonic Acid Pathway in Tomato Plant- Pseudomonas syringae Interaction. PLANTS 2020; 9:plants9020136. [PMID: 31978963 PMCID: PMC7076678 DOI: 10.3390/plants9020136] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 01/12/2020] [Accepted: 01/14/2020] [Indexed: 12/02/2022]
Abstract
The jasmonic acid pathway has been considered as the backbone of the response against necrotrophic pathogens. However, a hemi-biotrophic pathogen, such as Pseudomonas syringae, has taken advantage of the crosstalk between the different plant hormones in order to manipulate the responses for its own interest. Despite that, the way in which Pseudomonas syringae releases coronatine to activate jasmonic acid-derived responses and block the activation of salicylic acid-mediated responses is widely known. However, the implication of the jasmonic intermediates in the plant-Pseudomonas interaction is not studied yet. In this work, we analyzed the response of both, plant and bacteria using SiOPR3 tomato plants. Interestingly, SiOPR3 plants are more resistant to infection with Pseudomonas. The gene expression of bacteria showed that, in SiOPR3 plants, the activation of pathogenicity is repressed in comparison to wild type plants, suggesting that the jasmonic acid pathway might play a role in the pathogenicity of the bacteria. Moreover, treatments with JA restore the susceptibility as well as activate the expression of bacterial pathogenicity genes. The observed results suggest that a complete jasmonic acid pathway is necessary for the susceptibility of tomato plants to Pseudomonas syringae.
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56
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Wang KD, Borrego EJ, Kenerley CM, Kolomiets MV. Oxylipins Other Than Jasmonic Acid Are Xylem-Resident Signals Regulating Systemic Resistance Induced by Trichoderma virens in Maize. THE PLANT CELL 2020; 32:166-185. [PMID: 31690653 PMCID: PMC6961617 DOI: 10.1105/tpc.19.00487] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/30/2019] [Accepted: 11/01/2019] [Indexed: 05/18/2023]
Abstract
Multiple long-distance signals have been identified for pathogen-induced systemic acquired resistance, but mobile signals for symbiont-induced systemic resistance (ISR) are less well understood. We used ISR-positive and -negative mutants of maize (Zea mays) and the beneficial fungus Trichoderma virens and identified 12-oxo-phytodienoic acid (12-OPDA) and α-ketol of octadecadienoic acid (KODA) as important ISR signals. We show that a maize 13-lipoxygenase mutant, lox10, colonized by the wild-type T. virens (TvWT) lacked ISR response against Colletotrichum graminicola but instead displayed induced systemic susceptibility. Oxylipin profiling of xylem sap from T. virens-treated plants revealed that 12-OPDA and KODA levels correlated with ISR. Transfusing sap supplemented with 12-OPDA or KODA increased receiver plant resistance in a dose-dependent manner, with 12-OPDA restoring ISR of lox10 plants treated with TvWT or T. virens Δsm1, a mutant unable to induce ISR. Unexpectedly, jasmonic acid (JA) was not involved, as the JA-deficient opr7 opr8 mutant plants retained the capacity for T. virens-induced ISR. Transcriptome analysis of TvWT-treated maize B73 revealed upregulation of 12-OPDA biosynthesis and OPDA-responsive genes but downregulation of JA biosynthesis and JA response genes. We propose a model that differential regulation of 12-OPDA and JA in response to T. virens colonization results in ISR induction.
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Affiliation(s)
- Ken-Der Wang
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, Texas 77843
| | - Eli J Borrego
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, Texas 77843
| | - Charles M Kenerley
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, Texas 77843
| | - Michael V Kolomiets
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, Texas 77843
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57
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Yu G, Yu Y, Fan H, Zhang D, Cui N, Wang X, Jia S, Yang Y, Zhao J. Analysis of Protein Synthesis in Cucumber Leaves after Inoculation with Corynespora cassiicola: A Proteomic Approach. BIOCHEMISTRY (MOSCOW) 2019; 84:963-977. [PMID: 31522678 DOI: 10.1134/s0006297919080121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cucumber target leaf spot (TLS) disease caused by Corynespora cassiicola has become one of the most important fungal foliar diseases of cultivated cucumbers. However, the defense mechanisms of cucumber plants (Cucumis sativus) against C. cassiicola are still poorly understood. Here, proteins from resistant cucumber plants were analyzed using iTRAQ (isobaric tags for relative and absolute quantification) method. A total of 286 differentially expressed proteins were identified (p < 0.05, ratio > 1.2 or < 0.83) 6 and 24 h after pathogen inoculation in the resistant cultivar Jinyou 38 (the data are available via ProteomeXchange; identifier, PXD012903). Some of the early responses to C. cassiicola infection were revealed, and four factors related to the resistance of cucumber plants to TLS were discovered. First, the proteomic approach revealed modulation of signaling pathways in resistant cucumber plants in response to C. cassiicola infection. Second, the plant immune system recognizes the pathogen and initiates expression of immune response proteins, including those related to plant defense, stress response, signal transduction, cell metabolism, and redox regulation. Third, C. cassiicola activates common stress response pathways; in particular, mildew resistance locus O (MLO) proteins were found to play a crucial role in the TLS prevention. Fourth, rapid activation of the carbohydrate and secondary metabolic pathways, modification and reinforcement of cell walls, and adjustment of the apoplastic environment to the highly stressful conditions were crucial in the cucumber resistance to TLS. Overall, our data contribute to the understanding of interactions between plants and their pathogens and provide new insight into molecular processes involved in the resistance of cucumber plants to disease.
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Affiliation(s)
- G Yu
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, PR China
| | - Y Yu
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110866, PR China
| | - H Fan
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110866, PR China. .,Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang Agricultural University, Shenyang, 110866, PR China
| | - D Zhang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110866, PR China
| | - N Cui
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110866, PR China
| | - X Wang
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, PR China
| | - S Jia
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110866, PR China
| | - Y Yang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110866, PR China
| | - J Zhao
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110866, PR China
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Lu J, Xu Y, Fan Y, Wang Y, Zhang G, Liang Y, Jiang C, Hong B, Gao J, Ma C. Proteome and Ubiquitome Changes during Rose Petal Senescence. Int J Mol Sci 2019; 20:E6108. [PMID: 31817087 PMCID: PMC6940906 DOI: 10.3390/ijms20246108] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 12/01/2019] [Accepted: 12/02/2019] [Indexed: 12/25/2022] Open
Abstract
Petal senescence involves numerous programmed changes in biological and biochemical processes. Ubiquitination plays a critical role in protein degradation, a hallmark of organ senescence. Therefore, we investigated changes in the proteome and ubiquitome of senescing rose (Rosa hybrida) petals to better understand their involvement in petal senescence. Of 3859 proteins quantified in senescing petals, 1198 were upregulated, and 726 were downregulated during senescence. We identified 2208 ubiquitinated sites, including 384 with increased ubiquitination in 298 proteins and 1035 with decreased ubiquitination in 674 proteins. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses revealed that proteins related to peptidases in proteolysis and autophagy pathways were enriched in the proteome, suggesting that protein degradation and autophagy play important roles in petal senescence. In addition, many transporter proteins accumulated in senescing petals, and several transport processes were enriched in the ubiquitome, indicating that transport of substances is associated with petal senescence and regulated by ubiquitination. Moreover, several components of the brassinosteroid (BR) biosynthesis and signaling pathways were significantly altered at the protein and ubiquitination levels, implying that BR plays an important role in petal senescence. Our data provide a comprehensive view of rose petal senescence at the posttranslational level.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Chao Ma
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China; (J.L.); (Y.X.); (Y.F.); (Y.W.); (G.Z.); (Y.L.); (C.J.); (B.H.); (J.G.)
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59
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Doria E, Pagano A, Ferreri C, Larocca AV, Macovei A, Araújo SDS, Balestrazzi A. How Does the Seed Pre-Germinative Metabolism Fight Against Imbibition Damage? Emerging Roles of Fatty Acid Cohort and Antioxidant Defence. FRONTIERS IN PLANT SCIENCE 2019; 10:1505. [PMID: 31824536 PMCID: PMC6881478 DOI: 10.3389/fpls.2019.01505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 10/29/2019] [Indexed: 05/03/2023]
Abstract
During seed imbibition, lipids are engaged in membrane reorganization while facing free radical-mediated oxidative injury. In the present work, we explored changes in lipid components at different timepoints of imbibition (0.5, 2, 4, 6, and 8 h) in the legume Medicago truncatula, by combining biochemical approaches with targeted lipidomics and untargeted metabolomics. ROS and RNS (reactive oxygen and nitrogen species) accumulation was observed throughout the tested timepoints whereas lipid peroxidation increased at 4 h of imbibition. The seed response to oxidative damage was evidenced by a significant increase in tocopherols starting from 0.5 h of imbibition as well as by the reduction in total thiol content occurring at 2 h of imbibition. Since under physiological conditions, the proper functions of the cell membranes are strongly dependent on the qualitative and quantitative balance of fatty acid residues in phospholipids, the investigation was expanded to the fatty acid cohort of M. truncatula seeds. Total saturated fatty acids (SFAs), monounsaturated fatty acids (MUFAs), polyunsaturated fatty acids (PUFAs), omega(ω)-3 and omega(ω)-6 fatty acids showed fluctuations during seed imbibition. The most remarkable finding was the profile of the ω-3 PUFA docosopentaenoic acid (DPA, 7 cis, 10 cis, 13 cis, 16 cis, and 19 cis-22:5) that showed a peak (up to 1.0% of the total fatty acid content) at 0.5 and 8 h of imbibition, concomitant with the peaks observed in tocopherol levels. It is possible that the observed changes in DPA alter the physical properties of membranes, as reported in animal cells, triggering signaling pathways relevant for the cell defense against oxidative injury. Furthermore, the content and balance between tocopherols and PUFAs is regarded as a determinant of storage stability. No enhancement in trans-fatty acids occurred throughout imbibition, suggesting for a proper antioxidant response carried by the seed. Fatty acids profiles were integrated with data from untargeted metabolomics showing changes in lipid sub-pathways, among which fatty acid amide, lyso-phospholipids, and phospholipid metabolism. The emerging lipid profiles and dynamics are discussed in view of the overall imbibition damage generated during M. truncatula seed imbibition.
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Affiliation(s)
- Enrico Doria
- Department of Biology and Biotechnology “L. Spallanzani,”Pavia, Italy
| | - Andrea Pagano
- Department of Biology and Biotechnology “L. Spallanzani,”Pavia, Italy
| | - Carla Ferreri
- Consiglio Nazionale delle Ricerche, Research Area of Bologna, Bologna, Italy
| | | | - Anca Macovei
- Department of Biology and Biotechnology “L. Spallanzani,”Pavia, Italy
| | - Susana de Sousa Araújo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB-NOVA), Oeiras, Portugal
| | - Alma Balestrazzi
- Department of Biology and Biotechnology “L. Spallanzani,”Pavia, Italy
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60
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Lung SC, Chye ML. Arabidopsis acyl-CoA-binding proteins regulate the synthesis of lipid signals. THE NEW PHYTOLOGIST 2019; 223:113-117. [PMID: 30676650 DOI: 10.1111/nph.15707] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 01/11/2019] [Indexed: 05/20/2023]
Abstract
Plant lipid signals are crucial developmental modulators and stress response mediators. A family of acyl-CoA-binding proteins (ACBPs) participates in the lipid trafficking of these signals. Isoform-specific functions can arise from differences in their subcellular distribution, tissue-specificity, stress-responsiveness, and ligand selectivity. In lipid-mediated cell signaling, plant ACBPs are not merely transporters but are also important regulators via their interaction with lipid-metabolic enzymes and precursor lipids. In this Insight, the regulatory roles of plant ACBPs in the synthesis of various signaling lipids, including phosphatidic acid, sterols, oxylipins, and sphingolipids, are reviewed. We focus on the functional significance of these lipid signals in plant development and stress responses with an overview of recent work using reverse genetics and transgenic Arabidopsis.
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Affiliation(s)
- Shiu-Cheung Lung
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Mee-Len Chye
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
- State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
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61
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Patil V, McDermott HI, McAllister T, Cummins M, Silva JC, Mollison E, Meikle R, Morris J, Hedley PE, Waugh R, Dockter C, Hansson M, McKim SM. APETALA2 control of barley internode elongation. Development 2019; 146:dev.170373. [PMID: 31076487 PMCID: PMC6589076 DOI: 10.1242/dev.170373] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 05/02/2019] [Indexed: 01/08/2023]
Abstract
Many plants dramatically elongate their stems during flowering, yet how this response is coordinated with the reproductive phase is unclear. We demonstrate that microRNA (miRNA) control of APETALA2 (AP2) is required for rapid, complete elongation of stem internodes in barley, especially of the final ‘peduncle’ internode directly underneath the inflorescence. Disrupted miR172 targeting of AP2 in the Zeo1.b barley mutant caused lower mitotic activity, delayed growth dynamics and premature lignification in the peduncle leading to fewer and shorter cells. Stage- and tissue-specific comparative transcriptomics between Zeo1.b and its parent cultivar showed reduced expression of proliferation-associated genes, ectopic expression of maturation-related genes and persistent, elevated expression of genes associated with jasmonate and stress responses. We further show that applying methyl jasmonate (MeJA) phenocopied the stem elongation of Zeo1.b, and that Zeo1.b itself was hypersensitive to inhibition by MeJA but less responsive to promotion by gibberellin. Taken together, we propose that miR172-mediated restriction of AP2 may modulate the jasmonate pathway to facilitate gibberellin-promoted stem growth during flowering. Summary: Regulation of reproductive stem elongation in barley by APETALA2 suggests a pivotal role for phase change repression of JA-associated responses to promote internode growth.
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Affiliation(s)
- Vrushali Patil
- Division of Plant Sciences, School of Life Sciences, The University of Dundee at The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland
| | - Hannah I McDermott
- Division of Plant Sciences, School of Life Sciences, The University of Dundee at The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland
| | - Trisha McAllister
- Division of Plant Sciences, School of Life Sciences, The University of Dundee at The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland
| | - Michael Cummins
- Division of Plant Sciences, School of Life Sciences, The University of Dundee at The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland
| | - Joana C Silva
- Division of Plant Sciences, School of Life Sciences, The University of Dundee at The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland
| | - Ewan Mollison
- Division of Plant Sciences, School of Life Sciences, The University of Dundee at The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland
| | - Rowan Meikle
- Division of Plant Sciences, School of Life Sciences, The University of Dundee at The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland
| | - Jenny Morris
- Cell and Molecular Sciences, The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland
| | - Pete E Hedley
- Cell and Molecular Sciences, The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland
| | - Robbie Waugh
- Division of Plant Sciences, School of Life Sciences, The University of Dundee at The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland.,Cell and Molecular Sciences, The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland
| | - Christoph Dockter
- Carlsberg Research Laboratory, J.C. Jacobsens Gade 4, DK-1799 Copenhagen V, Denmark
| | - Mats Hansson
- Department of Biology, Lund University, Sölvegatan 35B, 22362 Lund, Sweden
| | - Sarah M McKim
- Division of Plant Sciences, School of Life Sciences, The University of Dundee at The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland
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Alahmad S, El Hassouni K, Bassi FM, Dinglasan E, Youssef C, Quarry G, Aksoy A, Mazzucotelli E, Juhász A, Able JA, Christopher J, Voss-Fels KP, Hickey LT. A Major Root Architecture QTL Responding to Water Limitation in Durum Wheat. FRONTIERS IN PLANT SCIENCE 2019; 10:436. [PMID: 31024600 PMCID: PMC6468307 DOI: 10.3389/fpls.2019.00436] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 03/22/2019] [Indexed: 05/21/2023]
Abstract
The optimal root system architecture (RSA) of a crop is context dependent and critical for efficient resource capture in the soil. Narrow root growth angle promoting deeper root growth is often associated with improved access to water and nutrients in deep soils during terminal drought. RSA, therefore is a drought-adaptive trait that could minimize yield losses in regions with limited rainfall. Here, GWAS for seminal root angle (SRA) identified seven marker-trait associations clustered on chromosome 6A, representing a major quantitative trait locus (qSRA-6A) which also displayed high levels of pairwise LD (r 2 = 0.67). Subsequent haplotype analysis revealed significant differences between major groups. Candidate gene analysis revealed loci related to gravitropism, polar growth and hormonal signaling. No differences were observed for root biomass between lines carrying hap1 and hap2 for qSRA-6A, highlighting the opportunity to perform marker-assisted selection for the qSRA-6A locus and directly select for wide or narrow RSA, without influencing root biomass. Our study revealed that the genetic predisposition for deep rooting was best expressed under water-limitation, yet the root system displayed plasticity producing root growth in response to water availability in upper soil layers. We discuss the potential to deploy root architectural traits in cultivars to enhance yield stability in environments that experience limited rainfall.
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Affiliation(s)
- Samir Alahmad
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Khaoula El Hassouni
- Laboratory of Microbiology and Molecular Biology, Faculty of Sciences, Mohammed V University, Rabat, Morocco
- International Center for Agricultural Research in the Dry Areas, Rabat, Morocco
| | - Filippo M. Bassi
- International Center for Agricultural Research in the Dry Areas, Rabat, Morocco
| | - Eric Dinglasan
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Chvan Youssef
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Georgia Quarry
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Alpaslan Aksoy
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | | | - Angéla Juhász
- School of Science, Edith Cowan University, Joondalup, WA, Australia
| | - Jason A. Able
- School of Agriculture, Food & Wine, Waite Research Institute, The University of Adelaide, Urrbrae, SA, Australia
| | - Jack Christopher
- Leslie Research Facility, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Kai P. Voss-Fels
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Lee T. Hickey
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
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MacGregor DR, Zhang N, Iwasaki M, Chen M, Dave A, Lopez‐Molina L, Penfield S. ICE1 and ZOU determine the depth of primary seed dormancy in Arabidopsis independently of their role in endosperm development. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 98:277-290. [PMID: 30570804 PMCID: PMC6900779 DOI: 10.1111/tpj.14211] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 11/20/2018] [Accepted: 12/12/2018] [Indexed: 05/06/2023]
Abstract
Seed dormancy is a widespread and key adaptive trait that is essential for the establishment of soil seed banks and prevention of pre-harvest sprouting. Herein we demonstrate that the endosperm-expressed transcription factors ZHOUPI (ZOU) and INDUCER OF CBF EXPRESSION1 (ICE1) play a role in determining the depth of primary dormancy in Arabidopsis. We show that ice1 or zou increases seed dormancy and the double mutant has an additive phenotype. This increased dormancy is associated with increased ABA levels, and can be separated genetically from any role in endosperm maturation because loss of ABA biosynthesis or DELAY OF GERMINATION 1 reverses the dormancy phenotype without affecting the aberrant seed morphology. Consistent with these results, ice1 endosperms had an increased capacity for preventing embryo greening, a phenotype previously associated with an increase in endospermic ABA levels. Although ice1 changes the expression of many genes, including some in ABA biosynthesis, catabolism and/or signalling, only ABA INSENSITIVE 3 is significantly misregulated in ice1 mutants. We also demonstrate that ICE1 binds to and inhibits expression of ABA INSENSITIVE 3. Our data demonstrate that Arabidopsis ICE1 and ZOU determine the depth of primary dormancy during maturation independently of their effect on endosperm development.
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Affiliation(s)
- Dana R. MacGregor
- Department of Crop GeneticsJohn Innes CentreNorwich Research ParkNorwichNR4 7UHUK
- Present address:
Department of Biointeractions and Crop ProtectionRothamsted ResearchHarpenden, HertfordshireAL5 2JQUK
| | - Naichao Zhang
- Department of Crop GeneticsJohn Innes CentreNorwich Research ParkNorwichNR4 7UHUK
| | - Mayumi Iwasaki
- Department of Plant Biology and Institute for Genetics and Genomics in Geneva (iGE3)University of Geneva30, Quai Ernest‐Ansermet CH‐1211Geneva4Switzerland
| | - Min Chen
- Department of Crop GeneticsJohn Innes CentreNorwich Research ParkNorwichNR4 7UHUK
- Present address:
College of Life Science and TechnologyHuazhong Agricultural UniversityWuhan430070China
| | - Anuja Dave
- Department of Crop GeneticsJohn Innes CentreNorwich Research ParkNorwichNR4 7UHUK
| | - Luis Lopez‐Molina
- Department of Plant Biology and Institute for Genetics and Genomics in Geneva (iGE3)University of Geneva30, Quai Ernest‐Ansermet CH‐1211Geneva4Switzerland
| | - Steven Penfield
- Department of Crop GeneticsJohn Innes CentreNorwich Research ParkNorwichNR4 7UHUK
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Gheysen G, Mitchum MG. Phytoparasitic Nematode Control of Plant Hormone Pathways. PLANT PHYSIOLOGY 2019; 179:1212-1226. [PMID: 30397024 PMCID: PMC6446774 DOI: 10.1104/pp.18.01067] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 10/24/2018] [Indexed: 05/17/2023]
Abstract
Phytoparasitic nematodes use multiple tactics to influence phytohormone physiology and alter plant developmental programs to establish feeding sites.
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Affiliation(s)
- Godelieve Gheysen
- Ghent University, Department of Biotechnology, Coupure Links 653, 9000 Ghent, Belgium
| | - Melissa G Mitchum
- University of Missouri, Division of Plant Sciences and Bond Life Sciences Center, Columbia, Missouri 65211
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65
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Liu S, Zhang P, Li C, Xia G. The moss jasmonate ZIM-domain protein PnJAZ1 confers salinity tolerance via crosstalk with the abscisic acid signalling pathway. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 280:1-11. [PMID: 30823987 DOI: 10.1016/j.plantsci.2018.11.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 11/08/2018] [Accepted: 11/11/2018] [Indexed: 05/22/2023]
Abstract
Abscisic acid (ABA) and jasmonates (JAs) are the primary plant hormones involved in mediating salt tolerance. In addition, these two plant hormones exert a synergistic effect to inhibit seed germination. However, the molecular mechanism of the interaction between ABA signalling and JA signalling is still not well documented. Here, a moss jasmonate ZIM-domain gene (PnJAZ1), which encodes a nucleus-localized protein with conserved ZIM and Jas domains, was cloned from Pohlia nutans. PnJAZ1 expression was rapidly induced by various abiotic stresses. The PnJAZ1 protein physically interacted with MYC2 and was degraded by exogenous 12-oxo-phytodienoic acid (OPDA) treatment, implying that the JAZ protein-mediated signalling pathway is conserved in plants. Transgenic Arabidopsis and Physcomitrella plants overexpressing PnJAZ1 showed increased tolerance to salt stress and decreased ABA sensitivity during seed germination and early development. The overexpression of PnJAZ1 inhibited the expression of ABA pathway genes related to seed germination and seedling growth. Moreover, the transgenic Arabidopsis lines exhibited enhanced tolerance to auxin (IAA) and glucose, mimicking the phenotypes of abi4 or abi5 mutants. These results suggest that PnJAZ1 acts as a repressor, mediates JA-ABA synergistic crosstalk and enhances plant growth under salt stress.
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Affiliation(s)
- Shenghao Liu
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266000, People's Republic of China; Key Laboratory of Marine Bioactive Substance, The First Institute of Oceanography, State Oceanic Administration, Qingdao, 266061, People's Republic of China
| | - Pengying Zhang
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266000, People's Republic of China
| | - Chengcheng Li
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266000, People's Republic of China
| | - Guangmin Xia
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266000, People's Republic of China.
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66
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Zhang W, Liu S, Li C, Zhang P, Zhang P. Transcriptome sequencing of Antarctic moss under salt stress emphasizes the important roles of the ROS-scavenging system. Gene 2019; 696:122-134. [PMID: 30790651 DOI: 10.1016/j.gene.2019.02.037] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 02/08/2019] [Accepted: 02/13/2019] [Indexed: 01/06/2023]
Abstract
Mosses are predominant terrestrial vegetation in Antarctica. Their distributions appear to be controlled more by water and salinity. The Antarctic moss Pohlia nutans can tolerate high salt stress. Here, high-throughput sequencing was employed to study the transcriptional characteristics of P. nutans under salt stress. Differentially expressed genes (DEGs) analysis showed that 1340 genes were significantly upregulated and 831 genes were markedly downregulated. The expression of representative DEGs including abscisic acid (ABA) and Jasmonates (JAs) pathway-related genes, antioxidant enzyme genes, and flavonoid biosynthesis-related genes were analyzed by real-time PCR and most were upregulated after salt stress. Furthermore, malondialdehyde (MDA) content was significantly increased after salt treatment. The levels of hydroxyl free radical (∙OH) first rose then quickly decreased. In addition, the activities of antioxidant enzymes, such as catalase (CAT), superoxide dismutase (SOD), and peroxidase (POD), and the flavonoid content were enhanced after salt stress. Exogenous application of ABA, Methyl jasmonate (MeJA) or proanthocyanidins (PA) improved the performance of P. nutans in response to high salt stress. Furthermore, real-time PCR showed that ABA or MeJA treatment upregulated the gene expression of antioxidant and flavonoid biosynthesis-related enzymes. These results suggest that the responses of P. nutans under salt stress are involved in activating phytohormone signaling pathways which trigger two main antioxidant defense systems (i.e., antioxidant enzymes and flavonoids) for protecting cell and scavenging reactive oxygen species.
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Affiliation(s)
- Wei Zhang
- School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, Shangdong, China
| | - Shenghao Liu
- Key Laboratory of Marine Bioactive Substance, the First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China.
| | - Chengcheng Li
- National Glycoengineering Research Center, School of Life Sciences, Shandong University, Qingdao 266237, China
| | - Pengying Zhang
- National Glycoengineering Research Center, School of Life Sciences, Shandong University, Qingdao 266237, China
| | - Peiyu Zhang
- School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, Shangdong, China
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67
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Kumar V, Vogelsang L, Seidel T, Schmidt R, Weber M, Reichelt M, Meyer A, Clemens S, Sharma SS, Dietz KJ. Interference between arsenic-induced toxicity and hypoxia. PLANT, CELL & ENVIRONMENT 2019; 42:574-590. [PMID: 30198184 DOI: 10.1111/pce.13441] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 08/30/2018] [Accepted: 08/30/2018] [Indexed: 06/08/2023]
Abstract
Plants often face combinatorial stresses in their natural environment. Here, arsenic (As) toxicity was combined with hypoxia (Hpx) in the roots of Arabidopsis thaliana as it often occurs in nature. Arsenic inhibited growth of both roots and leaves, whereas root growth almost entirely ceased in Hpx. Growth efficiently resumed, and Hpx marker transcripts decreased upon reaeration. Compromised recovery from HpxAs treatment following reaeration indicated some persistent effects of combined stresses despite lower As accumulation. Root glutathione redox potential turned more oxidized in Hpx and most strongly in HpxAs. The more oxidizing root cell redox potential and the lowered glutathione amounts may be conducive to the growth arrest of plants exposed to HpxAs. The stresses elicited changes in elemental and transcriptomic composition. Thus, calcium, magnesium, and phosphorous amounts decreased in rosettes, but the strongest decline was seen for potassium. The reorganized potassium-related transcriptome supports the conclusion that disturbed potassium homeostasis contributes to the growth phenotype. In a converse manner, photosynthesis-related parameters were hardly affected, whereas accumulated carbohydrates under all stresses and anthocyanins under Hpx exclude carbohydrate limitation. The study demonstrates the existence of both synergistic since mutually aggravating effects and antagonistic effects of single and combined stresses.
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Affiliation(s)
- Vijay Kumar
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, Bielefeld, Germany
- Department of Biosciences, Himachal Pradesh University, Shimla, India
| | - Lara Vogelsang
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, Bielefeld, Germany
| | - Thorsten Seidel
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, Bielefeld, Germany
| | - Romy Schmidt
- Institute of Biology I (Botany/Molecular Genetics), RWTH Aachen University, Aachen, Germany
| | - Michael Weber
- Department of Plant Physiology, Faculty of Biology, Chemistry and Earth Sciences, University of Bayreuth, Bayreuth, Germany
| | - Michael Reichelt
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Andreas Meyer
- Institute of Crop Science and Resource Conservation (INRES)-Chemical Signalling, University of Bonn, Bonn, Germany
- Bioeconomy Science Center, Forschungszentrum Jülich, Jülich, Germany
| | - Stephan Clemens
- Department of Plant Physiology, Faculty of Biology, Chemistry and Earth Sciences, University of Bayreuth, Bayreuth, Germany
| | - Shanti S Sharma
- Department of Biosciences, Himachal Pradesh University, Shimla, India
- Department of Botany, School of Life Sciences, Sikkim University, Gangtok, India
| | - Karl-Josef Dietz
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, Bielefeld, Germany
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68
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Wang F, Yu G, Liu P. Transporter-Mediated Subcellular Distribution in the Metabolism and Signaling of Jasmonates. FRONTIERS IN PLANT SCIENCE 2019; 10:390. [PMID: 31001304 PMCID: PMC6454866 DOI: 10.3389/fpls.2019.00390] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 03/14/2019] [Indexed: 05/18/2023]
Abstract
Jasmonates (jasmonic acid and its relatives) are a group of oxylipin phytohormones that are implicated in the regulation of a range of developmental processes and responses to environmental stimuli in plants. The biosynthesis of JAs occur sequentially in various subcellular compartments including the chloroplasts, peroxisomes and the cytoplasm. The biologically active jasmonoyl-isoleucine (JA-Ile) activates the core JA signaling in the nucleus by binding with its coreceptor, SCFCOI1-JAZ. Five members of a clade of ATP-binding cassette G (ABCG) transporters of Arabidopsis thaliana were identified as the candidates of jasmonate transporters (JATs) in yeast cells. Among these JATs, AtJAT1/AtABCG16, has a dual localization in the plasma membrane and nuclear envelop and mediates the efflux of jasmonic acid (JA) across the plasma membrane and influx of JA-Ile into the nucleus. Genetic, cellular and biochemical analyses have demonstrated that AtJAT1/AtABCG16 is crucial for modulating JA-Ile concentration in the nucleus to orchestrate JA signaling. AtJAT1 could also be involved in modulating the biosynthesis of JA-Ile by regulating the distribution of JA and JA-Ile in the cytoplasm and nucleus, which would contribute to the highly dynamic JA signaling. Furthermore, other JAT members are localized in the plasma membrane and possibly in peroxisomes. Characterization of these JATs will provide further insights into a crucial role of transporter-mediated subcellular distribution in the metabolism and signaling of plant hormones, an emerging theme supported by the identification of increasing number of endomembrane-localized transporters.
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69
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Trdá L, Janda M, Macková D, Pospíchalová R, Dobrev PI, Burketová L, Matušinsky P. Dual Mode of the Saponin Aescin in Plant Protection: Antifungal Agent and Plant Defense Elicitor. FRONTIERS IN PLANT SCIENCE 2019; 10:1448. [PMID: 31850004 PMCID: PMC6893899 DOI: 10.3389/fpls.2019.01448] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 10/17/2019] [Indexed: 05/13/2023]
Abstract
Being natural plant antimicrobials, saponins have potential for use as biopesticides. Nevertheless, their activity in plant-pathogen interaction is poorly understood. We performed a comparative study of saponins' antifungal activities on important crop pathogens based on their effective dose (EC50) values. Among those saponins tested, aescin showed itself to be the strongest antifungal agent. The antifungal effect of aescin could be reversed by ergosterol, thus suggesting that aescin interferes with fungal sterols. We tested the effect of aescin on plant-pathogen interaction in two different pathosystems: Brassica napus versus (fungus) Leptosphaeria maculans and Arabidopsis thaliana versus (bacterium) Pseudomonas syringae pv tomato DC3000 (Pst DC3000). We analyzed resistance assays, defense gene transcription, phytohormonal production, and reactive oxygen species production. Aescin activated B. napus defense through induction of the salicylic acid pathway and oxidative burst. This defense response led finally to highly efficient plant protection against L. maculans that was comparable to the effect of fungicides. Aescin also inhibited colonization of A. thaliana by Pst DC3000, the effect being based on active elicitation of salicylic acid (SA)-dependent immune mechanisms and without any direct antibacterial effect detected. Therefore, this study brings the first report on the ability of saponins to trigger plant immune responses. Taken together, aescin in addition to its antifungal properties activates plant immunity in two different plant species and provides SA-dependent resistance against both fungal and bacterial pathogens.
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Affiliation(s)
- Lucie Trdá
- Laboratory of Pathological Plant Physiology, Institute of Experimental Botany of The Czech Academy of Sciences, Prague, Czechia
- *Correspondence: Lucie Trdá, ;
| | - Martin Janda
- Laboratory of Pathological Plant Physiology, Institute of Experimental Botany of The Czech Academy of Sciences, Prague, Czechia
- Laboratory of Plant Biochemistry, Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Prague, Czechia
- Department Genetics, Faculty of Biology, Biocenter, Ludwig-Maximilian-University of Munich (LMU), Martinsried, Germany
| | - Denisa Macková
- Laboratory of Pathological Plant Physiology, Institute of Experimental Botany of The Czech Academy of Sciences, Prague, Czechia
- Laboratory of Plant Biochemistry, Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Prague, Czechia
| | - Romana Pospíchalová
- Laboratory of Pathological Plant Physiology, Institute of Experimental Botany of The Czech Academy of Sciences, Prague, Czechia
| | - Petre I. Dobrev
- Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany of The Czech Academy of Sciences, Prague, Czechia
| | - Lenka Burketová
- Laboratory of Pathological Plant Physiology, Institute of Experimental Botany of The Czech Academy of Sciences, Prague, Czechia
| | - Pavel Matušinsky
- Department of Plant Pathology, Agrotest Fyto, Ltd, Kroměrˇíž, Czechia
- Department of Botany, Faculty of Science, Palacký University in Olomouc, Olomouc, Czechia
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70
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Vaishak KP, Yadukrishnan P, Bakshi S, Kushwaha AK, Ramachandran H, Job N, Babu D, Datta S. The B-box bridge between light and hormones in plants. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 191:164-174. [PMID: 30640143 DOI: 10.1016/j.jphotobiol.2018.12.021] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 11/23/2018] [Accepted: 12/27/2018] [Indexed: 11/29/2022]
Abstract
Plant development is meticulously modulated by interactions between the surrounding environment and the endogenous phytohormones. Light, as an external signal coordinates with the extensive networks of hormones inside the plant to execute its effects on growth and development. Several proteins in plants have been identified for their crucial roles in mediating light regulated development. Among these are the B-box (BBX) family of transcription factors characterized by the presence of zinc-finger B-box domain in their N-terminal region. In Arabidopsis there are 32 BBX proteins that are divided into five structural groups on the basis of the domains present. Several BBX proteins play important roles in seedling photomorphogenesis, neighbourhood detection and photoperiodic regulation of flowering. There is increasing evidence that besides light signaling BBX proteins also play integral roles in several hormone signaling pathways in plants. Here we attempt to comprehensively integrate the roles of multiple BBX proteins in various light and hormone signaling pathways. We further discuss the role of the BBX proteins in mediating crosstalk between the two signaling pathways to harmonize plant growth and development. Finally, we try to analyse the conservation of BBX genes across species and discuss the role of BBX proteins in regulating economically important traits in crop plants.
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Affiliation(s)
- K P Vaishak
- Plant Cell and Development Biology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India; School of Biological Sciences, Indian Institute of Science Education and Research (IISER) Thiruvananthapuram, India
| | - Premachandran Yadukrishnan
- Plant Cell and Development Biology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India
| | - Souvika Bakshi
- Plant Cell and Development Biology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India
| | - Amit Kumar Kushwaha
- Plant Cell and Development Biology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India
| | - Harshil Ramachandran
- Plant Cell and Development Biology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India
| | - Nikhil Job
- Plant Cell and Development Biology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India
| | - Dion Babu
- Plant Cell and Development Biology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India
| | - Sourav Datta
- Plant Cell and Development Biology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India.
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71
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Le TB, Han CS, Cho K, Han O. Covalent immobilization of oxylipin biosynthetic enzymes on nanoporous rice husk silica for production of cis(+)-12-oxophytodienoic acid. ARTIFICIAL CELLS, NANOMEDICINE, AND BIOTECHNOLOGY 2018; 46:1523-1529. [PMID: 28889752 DOI: 10.1080/21691401.2017.1375939] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Soybean lipoxygenase, recombinant rice allene oxide synthase-1 and rice allene oxide cyclase were covalently immobilized on nanoporous rice husk silica using two types of linkers: glutardialdehyde and polyethylene glycol. The immobilization efficiency achieved using glutardialdehyde-linked rice husk silica was higher than that achieved using polyethylene glycol-linked rice husk silica (50-92% and 25-50%, respectively). Immobilization on both types of matrices significantly decreased the specific activities of the immobilized enzymes. Solid-phase reaction yields of the enzymes were determined relative to the yields observed for the solution-phase reactions. Yields of the solid-phase reactions catalyzed by immobilized soybean lipoxygenase, rice allene oxide synthase-1, and rice allene oxide cyclase ranged from 50% to 230% and were dependent on both the enzymes and linkers used. Production of cis(+)-12-oxophytodienoic acid from α-linolenic acid by consecutive reactions using all three enzymes in a co-immobilization system resulted in 83.6% and 65.1% yields on glutardialdehyde-linked and epichlorohydrin-polyethylene glycol-linked rice husk silica, respectively. Our results suggest that immobilization of biosynthetic enzymes of the octadecanoid pathway on rice husk silica may be an efficient method for the in vitro production of oxylipins. Additionally, enzyme immobilizations on rice husk silica matrices may be more broadly applicable for producing physiologically important compounds in other biosynthetic pathways.
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Affiliation(s)
- Thu Bao Le
- a Department of Molecular Biotechnology and Kumho Life Science Laboratory , College of Agriculture and Life Sciences, Chonnam National University , Gwangju , South Korea
| | - Chong Soo Han
- b Nano Bio Research Center , Jangseong , Jeollanamdo , South Korea
| | - Kyoungwon Cho
- a Department of Molecular Biotechnology and Kumho Life Science Laboratory , College of Agriculture and Life Sciences, Chonnam National University , Gwangju , South Korea
| | - Oksoo Han
- a Department of Molecular Biotechnology and Kumho Life Science Laboratory , College of Agriculture and Life Sciences, Chonnam National University , Gwangju , South Korea
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72
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Maynard D, Gröger H, Dierks T, Dietz KJ. The function of the oxylipin 12-oxophytodienoic acid in cell signaling, stress acclimation, and development. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:5341-5354. [PMID: 30169821 DOI: 10.1093/jxb/ery316] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 08/30/2018] [Indexed: 05/24/2023]
Abstract
Forty years ago, 12-oxophytodienoic acid (12-OPDA) was reported as a prostaglandin (PG)-like metabolite of linolenic acid found in extracts of flaxseed. Since then, numerous studies have determined the role of 12-OPDA in regulating plant immunity, seed dormancy, and germination. This review summarizes our current knowledge of the regulation of 12-OPDA synthesis in the chloroplast and 12-OPDA-dependent signaling in gene expression and targeting protein functions. We describe the properties of OPDA that are linked to the activities of PGs, which are derived from arachidonic acid and act as tissue hormones in animals, including humans. The similarity of OPDA with bioactive PGs is particularly evident for the most-studied cyclopentenone, PG 15-dPGJ2. In addition to chemical approaches towards 12-OPDA synthesis, bio-organic synthesis strategies for 12-OPDA and analogous substances have recently been established. The resulting availability of OPDA will aid the identification of additional effector proteins, help in elucidating the mechanisms of OPDA sensing and transmission, and will foster the analysis of the physiological responses to OPDA in plants. There is a need to determine the compartmentation and transport of 12-OPDA and its conjugates, over long distances as well as short. It will be important to further study OPDA in animal and human cells, for example with respect to beneficial anti-inflammatory and anti-cancer activities.
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Affiliation(s)
- Daniel Maynard
- Biochemistry and Physiology of Plants, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Harald Gröger
- Chair of Organic Chemistry I, Faculty of Chemistry, Bielefeld University, Bielefeld, Germany
| | - Thomas Dierks
- Biochemistry I, Faculty of Chemistry, Bielefeld University, Bielefeld, Germany
| | - Karl-Josef Dietz
- Biochemistry and Physiology of Plants, Faculty of Biology, Bielefeld University, Bielefeld, Germany
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73
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Enomoto H, Sensu T, Yumoto E, Yokota T, Yamane H. Derivatization for detection of abscisic acid and 12-oxo-phytodienoic acid using matrix-assisted laser desorption/ionization imaging mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2018; 32:1565-1572. [PMID: 29888502 DOI: 10.1002/rcm.8200] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/22/2018] [Accepted: 05/31/2018] [Indexed: 06/08/2023]
Abstract
RATIONALE Abscisic acid (ABA) and 12-oxo-phytodienoic acid (OPDA) play crucial roles in seed development. However, because of their low ionization efficiencies, visualization by matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS) has been difficult. In this study, we used on-tissue chemical derivatization (OTCD) with the derivatization reagent Girard's T (GirT) in MALDI-IMS to visualize ABA and OPDA. METHODS Immature Phaseolus vulgaris L. seeds were homogenized, and frozen homogenate sections were prepared using a cryostat. The concentration of the trifluoroacetic acid (TFA) and spray volume of the GirT solution were optimized using the homogenate sections. Immature seed sections were prepared using a cryostat, and the OTCD efficiency under optimal conditions was measured using liquid chromatography/tandem mass spectrometry (LC/MS/MS). The GirT solution was sprayed on the seed sections, and then MALDI-IMS was performed. RESULTS The optimal TFA concentration and spray volume were 2% and 500 μL, respectively. The OTCD efficiency rates were 61 ± 10% for ABA and 45 ± 5% for OPDA. The peaks corresponding to GirT-derivatized ABA (ABA-GirT) and OPDA (OPDA-GirT) standards were detected on the optimal OTCD-treated seed sections. ABA-GirT was mainly distributed in the embryo, while OPDA-GirT was localized in the external structures. These results are in agreement with our previously published results. CONCLUSIONS Our results show that ABA and OPDA in the immature seeds were exactly visualized using OTCD with GirT in MALDI-IMS. Therefore, OTCD with GirT in MALDI-IMS is a promising technique for future research on the biological roles of ABA and OPDA in various immature seeds.
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Affiliation(s)
- Hirofumi Enomoto
- Department of Biosciences, Faculty of Science and Engineering, Teikyo University, Utsunomiya, 320-8551, Japan
- Division of Integrated Science and Engineering, Graduate School of Science and Engineering, Teikyo University, Utsunomiya, 320-8551, Japan
- Advanced Instrumental Analysis Center of Teikyo University, Teikyo University, Utsunomiya, 320-8551, Japan
| | - Takuya Sensu
- Division of Integrated Science and Engineering, Graduate School of Science and Engineering, Teikyo University, Utsunomiya, 320-8551, Japan
| | - Emi Yumoto
- Advanced Instrumental Analysis Center of Teikyo University, Teikyo University, Utsunomiya, 320-8551, Japan
| | - Takao Yokota
- Department of Biosciences, Faculty of Science and Engineering, Teikyo University, Utsunomiya, 320-8551, Japan
| | - Hisakazu Yamane
- Department of Biosciences, Faculty of Science and Engineering, Teikyo University, Utsunomiya, 320-8551, Japan
- Advanced Instrumental Analysis Center of Teikyo University, Teikyo University, Utsunomiya, 320-8551, Japan
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74
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Schmitt AJ, Roy R, Klinkenberg PM, Jia M, Carter CJ. The Octadecanoid Pathway, but Not COI1, Is Required for Nectar Secretion in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2018; 9:1060. [PMID: 30135692 PMCID: PMC6092685 DOI: 10.3389/fpls.2018.01060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 06/29/2018] [Indexed: 05/08/2023]
Abstract
Over 75% of crop species produce nectar and are dependent on pollinators to achieve maximum seed set, yet little is known about the mechanisms regulating nectar secretion. The phytohormone jasmonic acid (JA) is recognized to be involved in several plant processes including development and defense. JA was also recently shown to positively influence nectar secretion in both floral and extrafloral nectaries. For example, endogenous JA levels peak in flowers just prior to nectar secretion, but the details of how JA regulates nectar secretion have yet to be elucidated. We have found that the octadecanoid pathway does indeed play a role in the production and regulation of floral nectar in Arabidopsis. Null alleles for several JA biosynthesis and response genes had significantly reduced amounts of nectar, as well as altered expression of genes known to be involved in nectar production. We additionally identified crosstalk between the JA and auxin response pathways in nectaries. For example, the nectar-less JA synthesis mutant aos-2 showed no auxin response in nectaries, but both nectar production and the auxin response were restored upon exogenous JA and auxin treatment. Conversely, coi1-1, a JA-Ile-insensitive receptor mutant, displayed no auxin response in nectaries under any circumstance, even in older flowers that produced nectar. Surprisingly, opr3-1, a mutant for 12-oxophytodienoate reductase 3 [an enzyme further down the JA biosynthetic pathway that reduces 12-oxo phytodienoic acid (OPDA)], produced no nectar in newly opened flowers, but did secrete nectar in older flowers. Furthermore, a similar phenotype was observed in coi1-1. Cumulatively, these observations strongly suggest an indispensable role for an octadecanoic acid- and auxin-dependent, but JA- and COI1-dispensible, pathway in regulating nectar production in Arabidopsis.
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Affiliation(s)
| | | | | | | | - Clay J. Carter
- Department of Plant and Microbial Biology, University of Minnesota Twin Cities, St. Paul, MN, United States
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75
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González-Bosch C. Priming plant resistance by activation of redox-sensitive genes. Free Radic Biol Med 2018; 122:171-180. [PMID: 29277443 DOI: 10.1016/j.freeradbiomed.2017.12.028] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 12/18/2017] [Accepted: 12/21/2017] [Indexed: 12/31/2022]
Abstract
Priming by natural compounds is an interesting alternative for sustainable agriculture, which also contributes to explore the molecular mechanisms associated with stress tolerance. Although hosts and stress types eventually determine the mode of action of plant-priming agents, it highlights that many of them act on redox signalling. These include vitamins thiamine, riboflavin and quercetin; organic acids like pipecolic, azelaic and hexanoic; volatile organic compounds such as methyl jasmonate; cell wall components like chitosans and oligogalacturonides; H2O2, etc. This review provides data on how priming inducers promote stronger and faster responses to stress by modulating the oxidative environment, and interacting with signalling pathways mediated by salycilic acid, jasmonic acid and ethylene. The histone modifications involved in priming that affect the transcription of defence-related genes are also discussed. Despite the evolutionary distance between plants and animals, and the fact that the plant innate immunity takes place in each plant cell, they show many similarities in the molecular mechanisms that underlie pathogen perception and further signalling to activate defence responses. This review highlights the similarities between priming through redox signalling in plants and in mammalian cells. The strategies used by pathogens to manipulate the host´s recognition and the further activation of defences also show similarities in both kingdoms. Moreover, phytochemicals like sulforaphane and 12-oxo-phytodienoic acid prime both plant and mammalian responses by activating redox-sensitive genes. Hence research data into the priming of plant defences can provide additional information and a new viewpoint for priming mammalian defence, and vice versa.
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Affiliation(s)
- Carmen González-Bosch
- Departamento de Bioquímica y Biología Molecular, Universitat de València, Instituto de Agroquímica y Tecnología de Alimentos (IATA/CSIC), Avenida Agustín Escardino 7, 46980 Paterna, Valencia, Spain.
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76
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Yoo Y, Park JC, Cho MH, Yang J, Kim CY, Jung KH, Jeon JS, An G, Lee SW. Lack of a Cytoplasmic RLK, Required for ROS Homeostasis, Induces Strong Resistance to Bacterial Leaf Blight in Rice. FRONTIERS IN PLANT SCIENCE 2018; 9:577. [PMID: 29868050 PMCID: PMC5968223 DOI: 10.3389/fpls.2018.00577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 04/13/2018] [Indexed: 05/02/2023]
Abstract
Many scientific findings have been reported on the beneficial function of reactive oxygen species (ROS) in various cellular processes, showing that they are not just toxic byproducts. The double-edged role of ROS shows the importance of the regulation of ROS level. We report a gene, rrsRLK (required for ROS-scavenging receptor-like kinase), that encodes a cytoplasmic RLK belonging to the non-RD kinase family. The gene was identified by screening rice RLK mutant lines infected with Xanthomonas oryzae pv. oryzae (Xoo), an agent of bacterial leaf blight of rice. The mutant (ΔrrsRLK) lacking the Os01g02290 gene was strongly resistant to many Xoo strains, but not to the fungal pathogen Magnaporthe grisea. ΔrrsRLK showed significantly higher expression of OsPR1a, OsPR1b, OsLOX, RBBTI4, and jasmonic acid-related genes than wild type. We showed that rrsRLK protein interacts with OsVOZ1 (vascular one zinc-finger 1) and OsPEX11 (peroxisomal biogenesis factor 11). In the further experiments, abnormal biogenesis of peroxisomes, hydrogen peroxide (H2O2) accumulation, and reduction of activity of ROS-scavenging enzymes were investigated in ΔrrsRLK. These results suggest that the enhanced resistance in ΔrrsRLK is due to H2O2 accumulation caused by irregular ROS-scavenging mechanism, and rrsRLK is most likely a key regulator required for ROS homeostasis in rice.
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Affiliation(s)
- Youngchul Yoo
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, South Korea
| | - Jong-Chan Park
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, South Korea
| | - Man-Ho Cho
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, South Korea
| | - Jungil Yang
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, South Korea
- Institute for Molecular Physiology, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
- Max Planck Institute for Plant Breeding Research, Cologne, Germany
| | - Chi-Yeol Kim
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, South Korea
| | - Ki-Hong Jung
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, South Korea
| | - Jong-Seong Jeon
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, South Korea
| | - Gynheung An
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, South Korea
| | - Sang-Won Lee
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, South Korea
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77
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d'Ippolito G, Nuzzo G, Sardo A, Manzo E, Gallo C, Fontana A. Lipoxygenases and Lipoxygenase Products in Marine Diatoms. Methods Enzymol 2018; 605:69-100. [PMID: 29909839 DOI: 10.1016/bs.mie.2018.02.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Marine diatoms negatively affect reproduction and later larval development of dominant zooplankton grazers such as copepods, thereby lowering the recruitment of the next generations of these small crustaceans that are a major food source for larval fish species. The phenomenon has been explained in terms of chemical defense due to grazer-induced synthesis of oxylipins, lipoxygenase-derived oxygenated fatty acid derivatives. Since this first report, studies about diatom oxylipins have multiplied and broadened toward other aspects concerning bloom dynamics, cell growth, and cell differentiation. Diatom oxylipins embrace a number of diverse structures that are recognized as chemical signals in ecological and physiological processes in many other organisms. In diatoms, the most studied examples include polyunsaturated aldehydes (PUAs) and nonvolatile oxylipins (NVOs). The purpose of this chapter is to provide the analytical tools to deal with identification, analysis and biosynthesis of these compounds. Emphasis is given to identification of the enzymatic steps and characterization of the species-specific lipoxygenases even in absence of the availability of molecular information.
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Affiliation(s)
- Giuliana d'Ippolito
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy
| | - Genoveffa Nuzzo
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy
| | - Angela Sardo
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy
| | - Emiliano Manzo
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy
| | - Carmela Gallo
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy
| | - Angelo Fontana
- National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Naples, Italy.
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78
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Cheng G, Chen MS, Zhu L. 12-Oxo-Phytodienoic Acid Enhances Wheat Resistance to Hessian Fly (Diptera: Cecidomyiidae) Under Heat Stress. JOURNAL OF ECONOMIC ENTOMOLOGY 2018; 111:917-922. [PMID: 29420735 DOI: 10.1093/jee/tox374] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
12-Oxo-phytodienoic acid (OPDA) plays unique roles in plant defenses against biotic and abiotic stresses. In the current study, we infested two resistant wheat (Triticum aestivum L.) cultivars, 'Molly' and 'Iris', with an avirulent Hessian fly population and determined the impact of exogenous OPDA application on wheat resistance to the insect under heat stress. We observed that Molly and Iris treated with OPDA solution prior to the heat treatment exhibited significantly enhanced insect resistance. We also measured OPDA concentrations at Hessian fly feeding sites in Molly infested with Hessian flies. We found that exogenous application of OPDA resulted in increased abundance of endogenous OPDA in Molly seedlings and that OPDA abundance in plants treated with the combination of heat and OPDA was similar to that of plants in the incompatible interaction. Our results suggest that high abundance of endogenous OPDA may be necessary for wheat under heat stress to resist to Hessian fly infestation.
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Affiliation(s)
- Ge Cheng
- Department of Biological Sciences, Fayetteville State University, Fayetteville, NC
| | - Ming-Shun Chen
- USDA-ARS and Department of Entomology, Kansas State University, Manhattan, KS
| | - Lieceng Zhu
- Department of Biological Sciences, Fayetteville State University, Fayetteville, NC
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79
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Gupta R, Min CW, Kramer K, Agrawal GK, Rakwal R, Park KH, Wang Y, Finkemeier I, Kim ST. A Multi-Omics Analysis of Glycine max Leaves Reveals Alteration in Flavonoid and Isoflavonoid Metabolism Upon Ethylene and Abscisic Acid Treatment. Proteomics 2018; 18:e1700366. [PMID: 29457974 DOI: 10.1002/pmic.201700366] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 01/11/2018] [Indexed: 11/06/2022]
Abstract
Phytohormones are central to plant growth and development. Despite the advancement in our knowledge of hormone signaling, downstream targets, and their interactions upon hormones action remain largely fragmented, especially at the protein and metabolite levels. With an aim to get new insight into the effects of two hormones, ethylene (ET) and abscisic acid (ABA), this study utilizes an integrated proteomics and metabolomics approach to investigate their individual and combined (ABA+ET) signaling in soybean leaves. Targeting low-abundance proteins, our previously established protamine sulfate precipitation method was applied, followed by label-free quantification of identified proteins. A total of 4129 unique protein groups including 1083 differentially modulated in one (individual) or other (combined) treatments were discerned. Functional annotation of the identified proteins showed an increased abundance of proteins related to the flavonoid and isoflavonoid biosynthesis and MAPK signaling pathway in response to ET treatment. HPLC analysis showed an accumulation of isoflavones (genistin, daidzein, and genistein) upon ET treatment, in agreement with the proteomics results. A metabolome analysis assigned 79 metabolites and further confirmed the accumulation of flavonoids and isoflavonoids in response to ET. A potential cross-talk between ET and MAPK signaling, leading to the accumulation of flavonoids and isoflavonoids in soybean leaves is suggested.
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Affiliation(s)
- Ravi Gupta
- Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University, Miryang, Republic of Korea
| | - Cheol Woo Min
- Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University, Miryang, Republic of Korea
| | - Katharina Kramer
- Plant Proteomics Group, Max Planck Institute for Plant Breeding Research, Cologne, Germany
| | - Ganesh Kumar Agrawal
- Research Laboratory for Biotechnology and Biochemistry, Kathmandu, Nepal
- GRADE Academy Private Limited, Birgunj, Nepal
| | - Randeep Rakwal
- Research Laboratory for Biotechnology and Biochemistry, Kathmandu, Nepal
- GRADE Academy Private Limited, Birgunj, Nepal
- Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan
- Global Research Center for Innovative Life Science, Peptide Drug Innovation, School of Pharmacy and Pharmaceutical Sciences, Hoshi University, Tokyo, Japan
| | - Ki-Hun Park
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, Republic of Korea
| | - Yiming Wang
- Department of Plant Microbe Interactions, Max Planck Institute for Plant Breeding Research, Cologne, Germany
| | - Iris Finkemeier
- Plant Proteomics Group, Max Planck Institute for Plant Breeding Research, Cologne, Germany
- Institute of Plant Biology and Biotechnology, University of Muenster, Muenster, Germany
| | - Sun Tae Kim
- Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University, Miryang, Republic of Korea
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80
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Park E, Nedo A, Caplan JL, Dinesh-Kumar SP. Plant-microbe interactions: organelles and the cytoskeleton in action. THE NEW PHYTOLOGIST 2018; 217:1012-1028. [PMID: 29250789 DOI: 10.1111/nph.14959] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 11/10/2017] [Indexed: 05/06/2023]
Abstract
Contents Summary 1012 I. Introduction 1012 II. The endomembrane system in plant-microbe interactions 1013 III. The cytoskeleton in plant-microbe interactions 1017 IV. Organelles in plant-microbe interactions 1019 V. Inter-organellar communication in plant-microbe interactions 1022 VI. Conclusions and prospects 1023 Acknowledgements 1024 References 1024 SUMMARY: Plants have evolved a multilayered immune system with well-orchestrated defense strategies against pathogen attack. Multiple immune signaling pathways, coordinated by several subcellular compartments and interactions between these compartments, play important roles in a successful immune response. Pathogens use various strategies to either directly attack the plant's immune system or to indirectly manipulate the physiological status of the plant to inhibit an immune response. Microscopy-based approaches have allowed the direct visualization of membrane trafficking events, cytoskeleton reorganization, subcellular dynamics and inter-organellar communication during the immune response. Here, we discuss the contributions of organelles and the cytoskeleton to the plant's defense response against microbial pathogens, as well as the mechanisms used by pathogens to target these compartments to overcome the plant's defense barrier.
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Affiliation(s)
- Eunsook Park
- Department of Plant Biology and The Genome Center, College of Biological Sciences, University of California, Davis, CA, 95616, USA
| | - Alexander Nedo
- Department of Biological Sciences, Delaware Biotechnology Institute, University of Delaware, Newark, DE, 19711, USA
| | - Jeffrey L Caplan
- Department of Biological Sciences, Delaware Biotechnology Institute, University of Delaware, Newark, DE, 19711, USA
- Department of Plant and Soil Sciences, University of Delaware, Newark, DE, 19711, USA
| | - Savithramma P Dinesh-Kumar
- Department of Plant Biology and The Genome Center, College of Biological Sciences, University of California, Davis, CA, 95616, USA
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81
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Salem MA, Li Y, Wiszniewski A, Giavalisco P. Regulatory-associated protein of TOR (RAPTOR) alters the hormonal and metabolic composition of Arabidopsis seeds, controlling seed morphology, viability and germination potential. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2017; 92:525-545. [PMID: 28845535 DOI: 10.1111/tpj.13667] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 08/04/2017] [Accepted: 05/18/2017] [Indexed: 06/07/2023]
Abstract
Target of Rapamycin (TOR) is a positive regulator of growth and development in all eukaryotes, which positively regulates anabolic processes like protein synthesis, while repressing catabolic processes, including autophagy. To better understand TOR function we decided to analyze its role in seed development and germination. We therefore performed a detailed phenotypic analysis using mutants of the REGULATORY-ASSOCIATED PROTEIN OF TOR 1B (RAPTOR1B), a conserved TOR interactor, acting as a scaffold protein, which recruits substrates for the TOR kinase. Our results show that raptor1b plants produced seeds that were delayed in germination and less resistant to stresses, leading to decreased viability. These physiological phenotypes were accompanied by morphological changes including decreased seed-coat pigmentation and reduced production of seed-coat mucilage. A detailed molecular analysis revealed that many of these morphological changes were associated with significant changes of the metabolic content of raptor1b seeds, including elevated levels of free amino acids, as well as reduced levels of protective secondary metabolites and storage proteins. Most of these observed changes were accompanied by significantly altered phytohormone levels in the raptor1b seeds, with increases in abscisic acid, auxin and jasmonic acid, which are known to inhibit germination. Delayed germination and seedling growth, observed in the raptor1b seeds, could be partially restored by the exogenous supply of gibberellic acid, indicating that TOR is at the center of a regulatory hub controlling seed metabolism, maturation and germination.
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Affiliation(s)
- Mohamed A Salem
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562, Egypt
| | - Yan Li
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Andrew Wiszniewski
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Patrick Giavalisco
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
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82
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Cheong H, Barbosa dos Santos I, Liu W, Gosse HN, Park SW. Cyclophilin 20-3 is positioned as a regulatory hub between light-dependent redox and 12-oxo-phytodienoic acid signaling. PLANT SIGNALING & BEHAVIOR 2017; 12:e1362520. [PMID: 28805482 PMCID: PMC5640192 DOI: 10.1080/15592324.2017.1362520] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 07/25/2017] [Accepted: 07/26/2017] [Indexed: 05/20/2023]
Abstract
The jasmonate family of phytohormones plays central roles in plant development and stress acclimation. However, the regulatory modes of their signaling circuitry remain largely unknown. Here we describe that cyclophilin 20-3 (CYP20-3), a binding protein of (+)-12-oxo-phytodienoic acid (OPDA), crisscrosses stress responses with light-dependent redox reactions, which fine-tunes the activity of key enzymes in the plastid photosynthetic carbon assimilation and sulfur assimilation pathways. Under stressed states, OPDA - accumulated in the chloroplasts - binds and promotes CYP20-3 to transfer electron (e-) from thioredoxins (i.e., type-f2 and -x) to 2-Cys peroxiredoxin B (2-CysPrxB) or serine acetyltransferase 1 (SAT1). Reduction (activation) of 2-CysPrxB then optimizes peroxide detoxification and carbon metabolisms in the photosynthesis, whereas the activation of SAT1 stimulates sulfur assimilation which in turn coordinates redox-resolved nucleus gene expressions in defense responses against biotic and abiotic stresses. Thus, we conclude that CYP20-3 is positioned as a unique metabolic hub in the interface between photosynthesis (light) and OPDA signaling, where controls resource (e-) allocations between plant growth and defense responses.
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Affiliation(s)
- Hoon Cheong
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, USA
| | | | - Wenshan Liu
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, USA
| | - Heather N. Gosse
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, USA
| | - Sang-Wook Park
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, USA
- CONTACT Sang-Wook Park 209 Rouse Life Science Bldg., Department of Entomology and Plant Pathology, Auburn University, Auburn AL36849, USA
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83
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Cai F, Watson BS, Meek D, Huhman DV, Wherritt DJ, Ben C, Gentzbittel L, Driscoll BT, Sumner LW, Bede JC. Medicago truncatula Oleanolic-Derived Saponins Are Correlated with Caterpillar Deterrence. J Chem Ecol 2017; 43:712-724. [PMID: 28744732 DOI: 10.1007/s10886-017-0863-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 06/06/2017] [Accepted: 06/21/2017] [Indexed: 11/24/2022]
Abstract
Plant resistance mechanisms to insect herbivory can potentially be bred into crops as an important strategy for integrated pest management. Medicago truncatula ecotypes inoculated with the rhizobium Ensifer medicae (Sinorhizobium medica) WSM419 were screened for resistance to herbivory by caterpillars of the beet armyworm, Spodoptera exigua, through leaf and whole plant choice studies; TN1.11 and F83005.5 are identified as the least and most deterrent ecotypes, respectively. In response to caterpillar herbivory, both ecotypes mount a robust burst of plant defensive jasmonate phytohormones. Restriction of caterpillars to either of these ecotypes does not adversely affect pest performance. This argues for an antixenosis (deterrence) resistance mechanism associated with the F83005.5 ecotype. Unbiased metabolomic profiling identified strong ecotype-specific differences in metabolite profile, particularly in the content of oleanolic-derived saponins that may act as antifeedants. Compared to the more susceptible ecotype, F83005.5 has higher levels of oleanolic-type zanhic acid- and medicagenic acid-derived compounds. Together, these data support saponin-mediated deterrence as a resistance mechanism of the F83005.5 ecotype and implicates these compounds as potential antifeedants that could be used in agricultural sustainable pest management strategies.
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Affiliation(s)
- Fanping Cai
- Department of Plant Science, McGill University, 21,111 Lakeshore, Ste-Anne-de-Bellevue, QC, H9X 3V9, Canada
| | - Bonnie S Watson
- The Samuel Roberts Noble Foundation, Ardmore, OK, 73401, USA
| | - David Meek
- Natural Resource Sciences, McGill University, Ste-Anne-de-Bellevue, QC, H9X 3V9, Canada
| | - David V Huhman
- The Samuel Roberts Noble Foundation, Ardmore, OK, 73401, USA
| | - Daniel J Wherritt
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | - Cecile Ben
- EcoLab, Université de Toulouse, Centre National de Recherche Scientifique, Institute National Polytechnique de Toulouse, Université Paul Sabatier, Toulouse, France
| | - Laurent Gentzbittel
- EcoLab, Université de Toulouse, Centre National de Recherche Scientifique, Institute National Polytechnique de Toulouse, Université Paul Sabatier, Toulouse, France
| | - Brian T Driscoll
- Natural Resource Sciences, McGill University, Ste-Anne-de-Bellevue, QC, H9X 3V9, Canada
| | - Lloyd W Sumner
- The Samuel Roberts Noble Foundation, Ardmore, OK, 73401, USA.,Department of Biochemistry, University of Missouri, Columbia, MO, 65211, USA
| | - Jacqueline C Bede
- Department of Plant Science, McGill University, 21,111 Lakeshore, Ste-Anne-de-Bellevue, QC, H9X 3V9, Canada.
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84
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Tzin V, Hojo Y, Strickler SR, Bartsch LJ, Archer CM, Ahern KR, Zhou S, Christensen SA, Galis I, Mueller LA, Jander G. Rapid defense responses in maize leaves induced by Spodoptera exigua caterpillar feeding. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:4709-4723. [PMID: 28981781 PMCID: PMC5853842 DOI: 10.1093/jxb/erx274] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Accepted: 07/13/2017] [Indexed: 05/20/2023]
Abstract
Insects such as the beet armyworm (Spodoptera exigua) cause extensive damage to maize (Zea mays). Maize plants respond by triggering defense signaling, changes in gene expression, and biosynthesis of specialized metabolites. Leaves of maize inbred line B73, which has an available genome sequence, were infested with S. exigua for 1 to 24 h, followed by comparisons of the transcript and metabolite profiles with those of uninfested controls. The most extensive gene expression responses occurred rapidly, within 4-6 h after caterpillar infestation. However, both gene expression and metabolite profiles were altered within 1 h and continued to change during the entire 24 h experiment. The defensive functions of three caterpillar-induced genes were examined using available Dissociation transposon insertions in maize inbred line W22. Whereas mutations in the benzoxazinoid biosynthesis pathway (Bx1 and Bx2) significantly improved caterpillar growth, the knockout of a 13-lipoxygenase (Lox8) involved in jasmonic acid biosynthesis did not. Interestingly, 9-lipoxygenases, which lead to the production of maize death acids, were more strongly induced by caterpillar feeding than 13-lipoxygenases, suggesting an as yet unknown function in maize defense against herbivory. Together, these results provide a comprehensive view of the dynamic transcriptomic and metabolomic responses of maize leaves to caterpillar feeding.
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Affiliation(s)
- Vered Tzin
- Boyce Thompson Institute for Plant Research, Tower Rd, Ithaca, NY, USA
- Correspondence:
| | - Yuko Hojo
- Okayama University, Institute of Plant Science and Resources, Kurashiki, Okayama, Japan
| | - Susan R Strickler
- Boyce Thompson Institute for Plant Research, Tower Rd, Ithaca, NY, USA
| | - Lee J Bartsch
- Boyce Thompson Institute for Plant Research, Tower Rd, Ithaca, NY, USA
| | - Cairo M Archer
- Boyce Thompson Institute for Plant Research, Tower Rd, Ithaca, NY, USA
| | - Kevin R Ahern
- Boyce Thompson Institute for Plant Research, Tower Rd, Ithaca, NY, USA
| | - Shaoqun Zhou
- Boyce Thompson Institute for Plant Research, Tower Rd, Ithaca, NY, USA
| | - Shawn A Christensen
- USDA-ARS Chemistry Unit, Center for Medical, Agricultural, and Veterinary Entomology, Gainesville, FL, USA
| | - Ivan Galis
- Okayama University, Institute of Plant Science and Resources, Kurashiki, Okayama, Japan
| | - Lukas A Mueller
- Boyce Thompson Institute for Plant Research, Tower Rd, Ithaca, NY, USA
| | - Georg Jander
- Boyce Thompson Institute for Plant Research, Tower Rd, Ithaca, NY, USA
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85
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Wang K, Froehlich JE, Zienkiewicz A, Hersh HL, Benning C. A Plastid Phosphatidylglycerol Lipase Contributes to the Export of Acyl Groups from Plastids for Seed Oil Biosynthesis. THE PLANT CELL 2017; 29:1678-1696. [PMID: 28687655 PMCID: PMC5559756 DOI: 10.1105/tpc.17.00397] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 06/29/2017] [Accepted: 07/06/2017] [Indexed: 05/20/2023]
Abstract
The lipid composition of thylakoid membranes inside chloroplasts is conserved from leaves to developing embryos. A finely tuned lipid assembly machinery is required to build these membranes during Arabidopsis thaliana development. Contrary to thylakoid lipid biosynthetic enzymes, the functions of most predicted chloroplast lipid-degrading enzymes remain to be elucidated. Here, we explore the biochemistry and physiological function of an Arabidopsis thylakoid membrane-associated lipase, PLASTID LIPASE1 (PLIP1). PLIP1 is a phospholipase A1 In vivo, PLIP1 hydrolyzes polyunsaturated acyl groups from a unique chloroplast-specific phosphatidylglycerol that contains 16:1 Δ3trans as its second acyl group. Thus far, a specific function of this 16:1 Δ3trans -containing phosphatidylglycerol in chloroplasts has remained elusive. The PLIP1 gene is highly expressed in seeds, and plip1 mutant seeds contain less oil and exhibit delayed germination compared with the wild type. Acyl groups released by PLIP1 are exported from the chloroplast, reincorporated into phosphatidylcholine, and ultimately enter seed triacylglycerol. Thus, 16:1 Δ3trans uniquely labels a small but biochemically active plastid phosphatidylglycerol pool in developing Arabidopsis embryos, which is subject to PLIP1 activity, thereby contributing a small fraction of the polyunsaturated fatty acids present in seed oil. We propose that acyl exchange involving thylakoid lipids functions in acyl export from plastids and seed oil biosynthesis.
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Affiliation(s)
- Kun Wang
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824
| | - John E Froehlich
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824
| | - Agnieszka Zienkiewicz
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824
- Great Lakes Bioenergy Research Center, East Lansing, Michigan 48823
| | - Hope Lynn Hersh
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824
| | - Christoph Benning
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824
- Great Lakes Bioenergy Research Center, East Lansing, Michigan 48823
- Department of Plant Biology, Michigan State University, East Lansing, Michigan 48824
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86
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Meza-Canales ID, Meldau S, Zavala JA, Baldwin IT. Herbivore perception decreases photosynthetic carbon assimilation and reduces stomatal conductance by engaging 12-oxo-phytodienoic acid, mitogen-activated protein kinase 4 and cytokinin perception. PLANT, CELL & ENVIRONMENT 2017; 40:1039-1056. [PMID: 27925291 DOI: 10.1111/pce.12874] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 10/31/2016] [Accepted: 11/01/2016] [Indexed: 05/24/2023]
Abstract
Herbivory-induced changes in photosynthesis have been documented in many plant species; however, the complexity of photosynthetic regulation and analysis has thwarted progress in understanding the mechanism involved, particularly those elicited by herbivore-specific elicitors. Here, we analysed the early photosynthetic gas exchange responses in Nicotiana attenuata plants after wounding and elicitation with Manduca sexta oral secretions and the pathways regulating these responses. Elicitation with M. sexta oral secretions rapidly decreased photosynthetic carbon assimilation (AC ) in treated and systemic (untreated, vascularly connected) leaves, which were associated with changes in stomatal conductance, rather than with changes in Rubisco activity and 1-5 ribulose-1,5-bisphosphate turnover. Phytohormone profiling and gas exchange analysis of oral secretion-elicited transgenic plants altered in phytohormone regulation, biosynthesis and perception, combined with micrografting techniques, revealed that the local photosynthetic responses were mediated by 12-oxo-phytodienoic acid, while the systemic responses involved interactions among jasmonates, cytokinins and abscisic acid signalling mediated by mitogen-activated protein kinase 4. The analysis also revealed a role for cytokinins interacting with mitogen-activated protein kinase 4 in CO2 -mediated stomatal regulation. Hence, oral secretions, while eliciting jasmonic acid-mediated defence responses, also elicit 12-oxo-phytodienoic acid-mediated changes in stomatal conductance and AC , an observation illustrating the complexity and economy of the signalling that regulates defence and carbon assimilation pathways in response to herbivore attack.
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Affiliation(s)
- Ivan D Meza-Canales
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Stefan Meldau
- KWS SAAT AG, Molecular Physiology, Einbeck, Niedersachsen, Germany
| | - Jorge A Zavala
- Facultad de Agronomía, Cátedra de Bioquímica - INBA/CONICET, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Ian T Baldwin
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena, Germany
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87
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Pedras MSC, To QH. Defense and signalling metabolites of the crucifer Erucastrum canariense: Synchronized abiotic induction of phytoalexins and galacto-oxylipins. PHYTOCHEMISTRY 2017; 139:18-24. [PMID: 28390240 DOI: 10.1016/j.phytochem.2017.03.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 03/14/2017] [Accepted: 03/22/2017] [Indexed: 06/07/2023]
Abstract
Erucastrum canariense Webb & Berthel. (Brassicaceae) is a wild crucifer that grows in rocky soils, in salt and water stressed habitats, namely in the Canary Islands and similar environments. Abiotic stress induced by copper chloride triggered formation of a phytoalexin and galacto-oxylipins in E. canariense, whereas wounding induced galacto-oxylipins but not phytoalexins. Analysis of the metabolite profiles of leaves of E. canariense followed by isolation and structure determination afforded the phytoalexin erucalexin, the phytoanticipin indolyl-3-acetonitrile, the galacto-oxylipins arabidopsides A, C, and D, and the oxylipin 12-oxophytodienoic acid. In addition, arabidopsides A and D were also identified in extracts of leaves of Nasturtium officinale R. Br.
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Affiliation(s)
- M Soledade C Pedras
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK, S7N 5C9, Canada.
| | - Q Huy To
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK, S7N 5C9, Canada
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88
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Zarattini M, Launay A, Farjad M, Wénès E, Taconnat L, Boutet S, Bernacchia G, Fagard M. The bile acid deoxycholate elicits defences in Arabidopsis and reduces bacterial infection. MOLECULAR PLANT PATHOLOGY 2017; 18:540-554. [PMID: 27085087 PMCID: PMC6638291 DOI: 10.1111/mpp.12416] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Disease has an effect on crop yields, causing significant losses. As the worldwide demand for agricultural products increases, there is a need to pursue the development of new methods to protect crops from disease. One mechanism of plant protection is through the activation of the plant immune system. By exogenous application, 'plant activator molecules' with elicitor properties can be used to activate the plant immune system. These defence-inducing molecules represent a powerful and often environmentally friendly tool to fight pathogens. We show that the secondary bile acid deoxycholic acid (DCA) induces defence in Arabidopsis and reduces the proliferation of two bacterial phytopathogens: Erwinia amylovora and Pseudomonas syringae pv. tomato. We describe the global defence response triggered by this new plant activator in Arabidopsis at the transcriptional level. Several induced genes were selected for further analysis by quantitative reverse transcription-polymerase chain reaction. We describe the kinetics of their induction and show that abiotic stress, such as moderate drought or nitrogen limitation, does not impede DCA induction of defence. Finally, we investigate the role in the activation of defence by this bile acid of the salicylic acid biosynthesis gene SID2, of the receptor-like kinase family genes WAK1-3 and of the NADPH oxidase-encoding RbohD gene. Altogether, we show that DCA constitutes a promising molecule for plant protection which can induce complementary lines of defence, such as callose deposition, reactive oxygen species accumulation and the jasmonic acid and salicylic acid signalling pathways.
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Affiliation(s)
- Marco Zarattini
- Institut Jean‐Pierre BourginUMR 1318, INRA, AgroParistech, ERL CNRS 3559, U. Paris‐Saclay, RD10VersaillesF‐78026France
- Department of Life Sciences and BiotechnologyUniversity of FerraraFerrara 44121Italy
| | - Alban Launay
- Institut Jean‐Pierre BourginUMR 1318, INRA, AgroParistech, ERL CNRS 3559, U. Paris‐Saclay, RD10VersaillesF‐78026France
- Université Paris‐Sud, U. Paris‐SaclayOrsay91405France
| | - Mahsa Farjad
- Institut Jean‐Pierre BourginUMR 1318, INRA, AgroParistech, ERL CNRS 3559, U. Paris‐Saclay, RD10VersaillesF‐78026France
| | - Estelle Wénès
- Institut Jean‐Pierre BourginUMR 1318, INRA, AgroParistech, ERL CNRS 3559, U. Paris‐Saclay, RD10VersaillesF‐78026France
| | - Ludivine Taconnat
- Institute of Plant Sciences – Paris‐Saclay, INRA, CNRSU. Paris‐Sud, U. Paris‐SaclayOrsay91405France
| | - Stéphanie Boutet
- Institut Jean‐Pierre BourginUMR 1318, INRA, AgroParistech, ERL CNRS 3559, U. Paris‐Saclay, RD10VersaillesF‐78026France
| | - Giovanni Bernacchia
- Department of Life Sciences and BiotechnologyUniversity of FerraraFerrara 44121Italy
| | - Mathilde Fagard
- Institut Jean‐Pierre BourginUMR 1318, INRA, AgroParistech, ERL CNRS 3559, U. Paris‐Saclay, RD10VersaillesF‐78026France
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89
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Sun YH, Hung CY, Qiu J, Chen J, Kittur FS, Oldham CE, Henny RJ, Burkey KO, Fan L, Xie J. Accumulation of high OPDA level correlates with reduced ROS and elevated GSH benefiting white cell survival in variegated leaves. Sci Rep 2017; 7:44158. [PMID: 28276518 PMCID: PMC5343462 DOI: 10.1038/srep44158] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 02/02/2017] [Indexed: 12/19/2022] Open
Abstract
Variegated 'Marble Queen' (Epipremnum aureum) plant has white (VMW) and green (VMG) sectors within the same leaf. The white sector cells containing undifferentiated chloroplasts are viable, but the underlying mechanism for their survival and whether these white cells would use any metabolites as signal molecules to communicate with the nucleus for maintaining their viability remain unclear. We analyzed and compared phytohormone levels with their precursors produced in chloroplasts between VMW and VMG, and further compared their transcriptomes to understand the consequences related to the observed elevated 12-oxo phytodienoic acid (OPDA), which was 9-fold higher in VMW than VMG. Transcriptomic study showed that a large group of OPDA-responsive genes (ORGs) were differentially expressed in VMW, including stress-related transcription factors and genes for reactive oxygen species (ROS) scavengers, DNA replication and repair, and protein chaperones. Induced expression of these ORGs could be verified in OPDA-treated green plants. Reduced level of ROS and higher levels of glutathione in VMW were further confirmed. Our results suggest that elevated OPDA or its related compounds are recruited by white cells as a signaling molecule(s) to up-regulate stress and scavenging activity related genes that leads to reduced ROS levels and provides survival advantages to the white cells.
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Affiliation(s)
- Ying-Hsuan Sun
- Department of Forestry, National Chung Hsing University, Taichung 402, Taiwan
| | - Chiu-Yueh Hung
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute & Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA
| | - Jie Qiu
- Department of Agronomy, Zhejiang University, Hangzhou 310029, China
| | - Jianjun Chen
- Environmental Horticulture Department and Mid-Florida Research and Education Center, University of Florida, Apopka, FL 32703, USA
| | - Farooqahmed S. Kittur
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute & Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA
| | - Carla E. Oldham
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute & Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA
| | - Richard J. Henny
- Environmental Horticulture Department and Mid-Florida Research and Education Center, University of Florida, Apopka, FL 32703, USA
| | - Kent O. Burkey
- USDA-ARS Plant Science Research Unit and Department of Crop Science, North Carolina State University, Raleigh, NC 27695, USA
| | - Longjiang Fan
- Department of Agronomy, Zhejiang University, Hangzhou 310029, China
| | - Jiahua Xie
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute & Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA
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90
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Visualisation of abscisic acid and 12-oxo-phytodienoic acid in immature Phaseolus vulgaris L. seeds using desorption electrospray ionisation-imaging mass spectrometry. Sci Rep 2017; 7:42977. [PMID: 28211480 PMCID: PMC5314351 DOI: 10.1038/srep42977] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 01/17/2017] [Indexed: 12/21/2022] Open
Abstract
The plant hormone abscisic acid (ABA) and the jasmonic acid related-compound 12-oxo-phytodienoic acid (OPDA) play crucial roles in seed development, dormancy, and germination. However, a lack of suitable techniques for visualising plant hormones has restricted the investigation of their biological mechanisms. In the present study, desorption electrospray ionisation-imaging mass spectrometry (DESI-IMS), a powerful tool for visualising metabolites in biological tissues, was used to visualise ABA and OPDA in immature Phaseolus vulgaris L. seed sections. The mass spectra, peak values and chemical formulae obtained from the analysis of seed sections were consistent with those determined for ABA and OPDA standards, as were the precursor and major fragment ions observed in tandem mass spectrometry (MS/MS) imaging. Furthermore, the precursor and fragment ion images showed similar distribution patterns. In addition, the localisation of ABA and OPDA using DESI-IMS was confirmed using liquid chromatography-MS/MS (LC-MS/MS). The results indicated that ABA was mainly distributed in the radical and cotyledon of the embryo, whereas OPDA was distributed exclusively in external structures, such as the hilum and seed coat. The present study is the first to report the visualisation of plant hormones using IMS, and demonstrates that DESI-IMS is a promising technique for future plant hormone research.
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91
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Ye ZW, Lung SC, Hu TH, Chen QF, Suen YL, Wang M, Hoffmann-Benning S, Yeung E, Chye ML. Arabidopsis acyl-CoA-binding protein ACBP6 localizes in the phloem and affects jasmonate composition. PLANT MOLECULAR BIOLOGY 2016; 92:717-730. [PMID: 27645136 DOI: 10.1007/s11103-016-0541-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 09/07/2016] [Indexed: 05/20/2023]
Abstract
Arabidopsis thaliana ACYL-COA-BINDING PROTEIN6 (AtACBP6) encodes a cytosolic 10-kDa AtACBP. It confers freezing tolerance in transgenic Arabidopsis, possibly by its interaction with lipids as indicated by the binding of acyl-CoA esters and phosphatidylcholine to recombinant AtACBP6. Herein, transgenic Arabidopsis transformed with an AtACBP6 promoter-driven β-glucuronidase (GUS) construct exhibited strong GUS activity in the vascular tissues. Immunoelectron microscopy using anti-AtACBP6 antibodies showed AtACBP6 localization in the phloem especially in the companion cells and sieve elements. Also, the presence of gold grains in the plasmodesmata indicated its potential role in systemic trafficking. The AtACBP6 protein, but not its mRNA, was found in phloem exudate of wild-type Arabidopsis. Fatty acid profiling using gas chromatography-mass spectrometry revealed an increase in the jasmonic acid (JA) precursor, 12-oxo-cis,cis-10,15-phytodienoic acid (cis-OPDA), and a reduction in JA and/or its derivatives in acbp6 phloem exudates in comparison to the wild type. Quantitative real-time PCR showed down-regulation of COMATOSE (CTS) in acbp6 rosettes suggesting that AtACBP6 affects CTS function. AtACBP6 appeared to affect the content of JA and/or its derivatives in the sieve tubes, which is consistent with its role in pathogen-defense and in its wound-inducibility of AtACBP6pro::GUS. Taken together, our results suggest the involvement of AtACBP6 in JA-biosynthesis in Arabidopsis phloem tissues.
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Affiliation(s)
- Zi-Wei Ye
- School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Shiu-Cheung Lung
- School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Tai-Hua Hu
- School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Qin-Fang Chen
- School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Yung-Lee Suen
- School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Mingfu Wang
- School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Susanne Hoffmann-Benning
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, USA
| | - Edward Yeung
- Department of Biological Sciences, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Mee-Len Chye
- School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
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92
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Bemm F, Becker D, Larisch C, Kreuzer I, Escalante-Perez M, Schulze WX, Ankenbrand M, Van de Weyer AL, Krol E, Al-Rasheid KA, Mithöfer A, Weber AP, Schultz J, Hedrich R. Venus flytrap carnivorous lifestyle builds on herbivore defense strategies. Genome Res 2016; 26:812-25. [PMID: 27197216 PMCID: PMC4889972 DOI: 10.1101/gr.202200.115] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 04/07/2016] [Indexed: 11/24/2022]
Abstract
Although the concept of botanical carnivory has been known since Darwin's time, the molecular mechanisms that allow animal feeding remain unknown, primarily due to a complete lack of genomic information. Here, we show that the transcriptomic landscape of the Dionaea trap is dramatically shifted toward signal transduction and nutrient transport upon insect feeding, with touch hormone signaling and protein secretion prevailing. At the same time, a massive induction of general defense responses is accompanied by the repression of cell death-related genes/processes. We hypothesize that the carnivory syndrome of Dionaea evolved by exaptation of ancient defense pathways, replacing cell death with nutrient acquisition.
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Affiliation(s)
- Felix Bemm
- Center for Computational and Theoretical Biology, Campus Hubland Nord; Department of Bioinformatics, Biocenter, Am Hubland, University of Würzburg, D-97218 Würzburg, Germany
| | - Dirk Becker
- Institute for Molecular Plant Physiology and Biophysics, Biocenter, University of Würzburg, 97082 Würzburg, Germany
| | - Christina Larisch
- Institute for Molecular Plant Physiology and Biophysics, Biocenter, University of Würzburg, 97082 Würzburg, Germany
| | - Ines Kreuzer
- Institute for Molecular Plant Physiology and Biophysics, Biocenter, University of Würzburg, 97082 Würzburg, Germany
| | - Maria Escalante-Perez
- Institute for Molecular Plant Physiology and Biophysics, Biocenter, University of Würzburg, 97082 Würzburg, Germany
| | - Waltraud X Schulze
- Department of Plant Systems Biology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Markus Ankenbrand
- Center for Computational and Theoretical Biology, Campus Hubland Nord; Department of Bioinformatics, Biocenter, Am Hubland, University of Würzburg, D-97218 Würzburg, Germany; Department of Animal Ecology and Tropical Biology, Biocenter, Am Hubland, 97074 Würzburg, Germany
| | - Anna-Lena Van de Weyer
- Center for Computational and Theoretical Biology, Campus Hubland Nord; Department of Bioinformatics, Biocenter, Am Hubland, University of Würzburg, D-97218 Würzburg, Germany
| | - Elzbieta Krol
- Institute for Molecular Plant Physiology and Biophysics, Biocenter, University of Würzburg, 97082 Würzburg, Germany
| | - Khaled A Al-Rasheid
- Institute for Molecular Plant Physiology and Biophysics, Biocenter, University of Würzburg, 97082 Würzburg, Germany; Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Axel Mithöfer
- Bioorganic Chemistry Department, Max-Planck-Institute for Chemical Ecology, 07745 Jena, Germany
| | - Andreas P Weber
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Sciences (CEPLAS), Heinrich-Heine-University, 40225 Düsseldorf, Germany
| | - Jörg Schultz
- Center for Computational and Theoretical Biology, Campus Hubland Nord; Department of Bioinformatics, Biocenter, Am Hubland, University of Würzburg, D-97218 Würzburg, Germany
| | - Rainer Hedrich
- Institute for Molecular Plant Physiology and Biophysics, Biocenter, University of Würzburg, 97082 Würzburg, Germany
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93
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Cuypers A, Hendrix S, Amaral dos Reis R, De Smet S, Deckers J, Gielen H, Jozefczak M, Loix C, Vercampt H, Vangronsveld J, Keunen E. Hydrogen Peroxide, Signaling in Disguise during Metal Phytotoxicity. FRONTIERS IN PLANT SCIENCE 2016; 7:470. [PMID: 27199999 PMCID: PMC4843763 DOI: 10.3389/fpls.2016.00470] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Accepted: 03/24/2016] [Indexed: 05/18/2023]
Abstract
Plants exposed to excess metals are challenged by an increased generation of reactive oxygen species (ROS) such as superoxide ([Formula: see text]), hydrogen peroxide (H2O2) and the hydroxyl radical ((•)OH). The mechanisms underlying this oxidative challenge are often dependent on metal-specific properties and might play a role in stress perception, signaling and acclimation. Although ROS were initially considered as toxic compounds causing damage to various cellular structures, their role as signaling molecules became a topic of intense research over the last decade. Hydrogen peroxide in particular is important in signaling because of its relatively low toxicity, long lifespan and its ability to cross cellular membranes. The delicate balance between its production and scavenging by a plethora of enzymatic and metabolic antioxidants is crucial in the onset of diverse signaling cascades that finally lead to plant acclimation to metal stress. In this review, our current knowledge on the dual role of ROS in metal-exposed plants is presented. Evidence for a relationship between H2O2 and plant metal tolerance is provided. Furthermore, emphasis is put on recent advances in understanding cellular damage and downstream signaling responses as a result of metal-induced H2O2 production. Finally, special attention is paid to the interaction between H2O2 and other signaling components such as transcription factors, mitogen-activated protein kinases, phytohormones and regulating systems (e.g. microRNAs). These responses potentially underlie metal-induced senescence in plants. Elucidating the signaling network activated during metal stress is a pivotal step to make progress in applied technologies like phytoremediation of polluted soils.
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Affiliation(s)
- Ann Cuypers
- Environmental Biology, Centre for Environmental Sciences, Hasselt UniversityDiepenbeek, Belgium
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Dave A, Vaistij FE, Gilday AD, Penfield SD, Graham IA. Regulation of Arabidopsis thaliana seed dormancy and germination by 12-oxo-phytodienoic acid. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:2277-84. [PMID: 26873978 PMCID: PMC4809285 DOI: 10.1093/jxb/erw028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We previously demonstrated that the oxylipin 12-oxo-phytodienoic acid (OPDA) acts along with abscisic acid to regulate seed germination in Arabidopsis thaliana, but the mechanistic details of this synergistic interaction remain to be elucidated. Here, we show that OPDA acts through the germination inhibition effects of abscisic acid, the abscisic acid-sensing ABI5 protein, and the gibberellin-sensing RGL2 DELLA protein. We further demonstrate that OPDA also acts through another dormancy-promoting factor, MOTHER-OF-FT-AND-TFL1 (MFT). Both abscisic acid and MFT positively feed back into the OPDA pathway by promoting its accumulation. These results confirm the central role of OPDA in regulating seed dormancy and germination in A. thaliana and underline the complexity of interactions between OPDA and other dormancy-promoting factors such as abscisic acid, RGL2, and MFT.
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Affiliation(s)
- Anuja Dave
- Centre for Novel Agricultural Products, Department of Biology, University of York, York YO10 5DD, United Kingdom
| | - Fabián E Vaistij
- Centre for Novel Agricultural Products, Department of Biology, University of York, York YO10 5DD, United Kingdom
| | - Alison D Gilday
- Centre for Novel Agricultural Products, Department of Biology, University of York, York YO10 5DD, United Kingdom
| | - Steven D Penfield
- Department of Crop Genetics, John Innes Centre, Norwich NR4 7UH, United Kingdom
| | - Ian A Graham
- Centre for Novel Agricultural Products, Department of Biology, University of York, York YO10 5DD, United Kingdom
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95
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Julio LF, Barrero AF, Herrador del Pino MM, Arteaga JF, Burillo J, Andres MF, Díaz CE, González-Coloma A. Phytotoxic and Nematicidal Components of Lavandula luisieri. JOURNAL OF NATURAL PRODUCTS 2016; 79:261-6. [PMID: 26797293 DOI: 10.1021/acs.jnatprod.5b00501] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Several preparations were obtained from the aerial parts of predomesticated Lavandula luisieri, including the essential oil and ethanolic, hexane, and ethyl acetate extractives. Additionally, pilot plant vapor pressure extraction was carried out at a pressure range of 0.5-1.0 bar to give a vapor pressure oil and an aqueous residue. A chemical study of the hexane extract led to the isolation of six necrodane derivatives (1, 2, and 4-7), with four of these (1, 2, 5, and 7) being new, as well as camphor, a cadinane sesquiterpene (9), tormentic acid, and ursolic acid. The EtOAc and EtOH extracts contained a mixture of phenolic compounds with rosmarinic acid being the major component. Workup of the aqueous residue resulted in the isolation of the necrodane 3 and (1R*,2S*,4R*)-p-menth-5-ene-1,2,8-triol (8), both new natural compounds. The structures of the new compounds were established based on their spectroscopic data. The phytotoxic and nematicidal activities of these compounds were evaluated.
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Affiliation(s)
- Luis F Julio
- Instituto de Ciencias Agrarias, Consejo Superior de Investigaciones Científicas , Serrano 115-bis, 28006 Madrid, Spain
| | - Alejandro F Barrero
- Departamento de Química Orgánica, Instituto de Biotecnología, Universidad de Granada , Campus de Fuente Nueva, s/n, 18071 Granada, Spain
| | - M Mar Herrador del Pino
- Departamento de Química Orgánica, Instituto de Biotecnología, Universidad de Granada , Campus de Fuente Nueva, s/n, 18071 Granada, Spain
| | - Jesús F Arteaga
- CIQSO, Center for Research in Sustainable Chemistry and Department of Chemical Engineering, Physical Chemistry, and Organic Chemistry, Facultad de Ciencias Experimentales, Universidad de Huelva , Campus el Carmen, 21071 Huelva, Spain
| | - Jesús Burillo
- Departamento de Ciencia, Tecnología y Universidad, Centro de Investigación y Tecnología Agroalimentaria de Aragón, Gobierno de Aragón , Avenida Montañana, 930, Zaragoza, Spain
| | - Maria Fe Andres
- Instituto de Ciencias Agrarias, Consejo Superior de Investigaciones Científicas , Serrano 115-bis, 28006 Madrid, Spain
| | - Carmen E Díaz
- Instituto de Productos Naturales y Agrobiología, Consejo Superior de Investigaciones Científicas , Avenida Astrofísico F. Sánchez, 3, 38206 La Laguna, Tenerife, Spain
| | - Azucena González-Coloma
- Instituto de Ciencias Agrarias, Consejo Superior de Investigaciones Científicas , Serrano 115-bis, 28006 Madrid, Spain
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96
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McLachlan DH, Lan J, Geilfus CM, Dodd AN, Larson T, Baker A, Hõrak H, Kollist H, He Z, Graham I, Mickelbart MV, Hetherington AM. The Breakdown of Stored Triacylglycerols Is Required during Light-Induced Stomatal Opening. Curr Biol 2016; 26:707-12. [PMID: 26898465 PMCID: PMC4791430 DOI: 10.1016/j.cub.2016.01.019] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 12/09/2015] [Accepted: 01/07/2016] [Indexed: 12/22/2022]
Abstract
Stomata regulate the uptake of CO2 and the loss of water vapor [1] and contribute to the control of water-use efficiency [2] in plants. Although the guard-cell-signaling pathway coupling blue light perception to ion channel activity is relatively well understood [3], we know less about the sources of ATP required to drive K+ uptake [3, 4, 5, 6]. Here, we show that triacylglycerols (TAGs), present in Arabidopsis guard cells as lipid droplets (LDs), are involved in light-induced stomatal opening. Illumination induces reductions in LD abundance, and this involves the PHOT1 and PHOT2 blue light receptors [3]. Light also induces decreases in specific TAG molecular species. We hypothesized that TAG-derived fatty acids are metabolized by peroxisomal β-oxidation to produce ATP required for stomatal opening. In silico analysis revealed that guard cells express all the genes required for β-oxidation, and we showed that light-induced stomatal opening is delayed in three TAG catabolism mutants (sdp1, pxa1, and cgi-58) and in stomata treated with a TAG breakdown inhibitor. We reasoned that, if ATP supply was delaying light-induced stomatal opening, then the activity of the plasma membrane H+-ATPase should be reduced at this time. Monitoring changes in apoplastic pH in the mutants showed that this was the case. Together, our results reveal a new role for TAGs in vegetative tissue and show that PHOT1 and PHOT2 are involved in reductions in LD abundance. Reductions in LD abundance in guard cells of the lycophyte Selaginella suggest that TAG breakdown may represent an evolutionarily conserved mechanism in light-induced stomatal opening. Guard cells break down triacylglycerols to supply ATP for use in stomatal opening Light-induced stomatal opening is delayed in triacylglycerol catabolism mutants PHOT blue light receptors are involved in reductions in lipid droplet (LD) abundance Light-induced reductions in LD abundance occur in Selaginella guard cells
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Affiliation(s)
- Deirdre H McLachlan
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
| | - Jue Lan
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
| | - Christoph-Martin Geilfus
- Institut fur Pflanzenernährung und Bodenkunde, Christian-Albrechts-Universität zu Kiel, Hermann-Rodewald- Straße 2, 24118 Kiel, Germany
| | - Antony N Dodd
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
| | - Tony Larson
- Centre for Novel Agricultural Products, Department of Biology, University of York, York YO10 5DD, UK
| | - Alison Baker
- Centre for Plant Sciences, School of Molecular and Cellular Biology, University of Leeds, Leeds LS2 9JT, UK
| | - Hanna Hõrak
- Institute of Technology, University of Tartu, Nooruse 1, Tartu 50411, Estonia
| | - Hannes Kollist
- Institute of Technology, University of Tartu, Nooruse 1, Tartu 50411, Estonia
| | - Zhesi He
- Centre for Novel Agricultural Products, Department of Biology, University of York, York YO10 5DD, UK
| | - Ian Graham
- Centre for Novel Agricultural Products, Department of Biology, University of York, York YO10 5DD, UK
| | - Michael V Mickelbart
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK; Department of Botany and Plant Pathology, Purdue University, 915 W. State Street, West Lafayette, IN 47907, USA
| | - Alistair M Hetherington
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK.
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97
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Abstract
Plants collectively produce hundreds of thousands of specialized metabolites that are not required for growth or development. Each species has a qualitatively unique profile, with variation among individuals, growth stages, and tissues. By the 1950s, entomologists began to recognize the supreme importance of these metabolites in shaping insect herbivore communities. Plant defense theories arose to address observed patterns of variation, but provided few testable hypotheses because they did not distinguish clearly among proximate and ultimate causes. Molecular plant-insect interaction research has since revealed the sophistication of plant metabolic, developmental, and signaling networks. This understanding at the molecular level, rather than theoretical predictions, has driven the development of new hypotheses and tools and pushed the field forward. We reflect on the utility of the functional perspective provided by the optimal defense theory, and propose a conceptual model of plant defense as a series of layers each at a different level of analysis, illustrated by advances in the molecular ecology of plant-insect interactions.
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Affiliation(s)
- Meredith C Schuman
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany; ,
| | - Ian T Baldwin
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany; ,
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98
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Li Y, Scott R, Doughty J, Grant M, Qi B. Protein S-Acyltransferase 14: A Specific Role for Palmitoylation in Leaf Senescence in Arabidopsis. PLANT PHYSIOLOGY 2016; 170:415-28. [PMID: 26537563 PMCID: PMC4704564 DOI: 10.1104/pp.15.00448] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 11/03/2015] [Indexed: 05/18/2023]
Abstract
The Asp-His-His-Cys-Cys-rich domain-containing Protein S-Acyl Transferases (PATs) are multipass transmembrane proteins that catalyze S-acylation (commonly known as S-palmitoylation), the reversible posttranslational lipid modification of proteins. Palmitoylation enhances the hydrophobicity of proteins, contributes to their membrane association, and plays roles in protein trafficking and signaling. In Arabidopsis (Arabidopsis thaliana), there are at least 24 PATs; previous studies on two PATs established important roles in growth, development, and stress responses. In this study, we identified a, to our knowledge, novel PAT, AtPAT14, in Arabidopsis. Complementation studies in yeast (Saccharomyces cerevisiae) and Arabidopsis demonstrate that AtPAT14 possesses PAT enzyme activity. Disruption of AtPAT14 by T-DNA insertion resulted in an accelerated senescence phenotype. This coincided with increased transcript levels of some senescence-specific and pathogen-resistant marker genes. We show that early senescence of pat14 does not involve the signaling molecules jasmonic acid and abscisic acid, or autophagy, but associates with salicylic acid homeostasis and signaling. This strongly suggests that AtPAT14 plays a pivotal role in regulating senescence via salicylic acid pathways. Senescence is a complex process required for normal plant growth and development and requires the coordination of many genes and signaling pathways. However, precocious senescence results in loss of biomass and seed production. The negative regulation of leaf senescence by AtPAT14 in Arabidopsis highlights, to our knowledge for the first time, a specific role for palmitoylation in leaf senescence.
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Affiliation(s)
- Yaxiao Li
- Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom (Y.L., R.S., J.D., B.Q.); andCollege of Life and Environmental Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, United Kingdom (M.G.)
| | - Rod Scott
- Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom (Y.L., R.S., J.D., B.Q.); andCollege of Life and Environmental Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, United Kingdom (M.G.)
| | - James Doughty
- Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom (Y.L., R.S., J.D., B.Q.); andCollege of Life and Environmental Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, United Kingdom (M.G.)
| | - Murray Grant
- Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom (Y.L., R.S., J.D., B.Q.); andCollege of Life and Environmental Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, United Kingdom (M.G.)
| | - Baoxiu Qi
- Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom (Y.L., R.S., J.D., B.Q.); andCollege of Life and Environmental Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, United Kingdom (M.G.)
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99
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Guerreiro A, Figueiredo J, Sousa Silva M, Figueiredo A. Linking Jasmonic Acid to Grapevine Resistance against the Biotrophic Oomycete Plasmopara viticola. FRONTIERS IN PLANT SCIENCE 2016; 7:565. [PMID: 27200038 PMCID: PMC4848468 DOI: 10.3389/fpls.2016.00565] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 04/12/2016] [Indexed: 05/07/2023]
Abstract
Plant resistance to biotrophic pathogens is classically believed to be mediated through salicylic acid (SA) signaling leading to hypersensitive response followed by the establishment of Systemic Acquired Resistance. Jasmonic acid (JA) signaling has extensively been associated to the defense against necrotrophic pathogens and insects inducing the accumulation of secondary metabolites and PR proteins. Moreover, it is believed that plants infected with biotrophic fungi suppress JA-mediated responses. However, recent evidences have shown that certain biotrophic fungal species also trigger the activation of JA-mediated responses, suggesting a new role for JA in the defense against fungal biotrophs. Plasmopara viticola is a biotrophic oomycete responsible for the grapevine downy mildew, one of the most important diseases in viticulture. In this perspective, we show recent evidences of JA participation in grapevine resistance against P. viticola, outlining the hypothesis of JA involvement in the establishment of an incompatible interaction with this biotroph. We also show that in the first hours after P. viticola inoculation the levels of OPDA, JA, JA-Ile, and SA increase together with an increase of expression of genes associated to JA and SA signaling pathways. Our data suggests that, on the first hours after P. viticola inoculation, JA signaling pathway is activated and the outcomes of JA-SA interactions may be tailored in the defense response against this biotrophic pathogen.
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Affiliation(s)
- Ana Guerreiro
- Biosystems and Integrative Sciences Institute, Science Faculty of Lisbon UniversityLisboa, Portugal
| | - Joana Figueiredo
- Biosystems and Integrative Sciences Institute, Science Faculty of Lisbon UniversityLisboa, Portugal
- Laboratório de FTICR e Espectrometria de Massa Estrutural, Faculdade de Ciências, Universidade de LisboaLisboa, Portugal
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de LisboaLisboa, Portugal
| | - Marta Sousa Silva
- Laboratório de FTICR e Espectrometria de Massa Estrutural, Faculdade de Ciências, Universidade de LisboaLisboa, Portugal
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de LisboaLisboa, Portugal
| | - Andreia Figueiredo
- Biosystems and Integrative Sciences Institute, Science Faculty of Lisbon UniversityLisboa, Portugal
- *Correspondence: Andreia Figueiredo,
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100
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Abstract
Lipids are important signaling compounds in plants. They can range from small lipophilic molecules like the dicarboxylic acid Azelaic acid to complex phosphoglycerolipids and regulate plant development as well as the response to biotic and abiotic stress. While their intracellular function is well described, several lipophilic signals are known to be found in the plant phloem and can, thus, also play a role in long-distance signaling. Mostly, they play a role in the pathogen response and systemic acquired resistance. This is particularly true for oxylipins, dehydroabietinal, and azelaic acid. However, several phospholipids have now been described in phloem exudates. Their intracellular function as well as implications and a model for long-distance signaling are discussed in this chapter.
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