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Jain A, Chatterjee A, Das S. Synergistic consortium of beneficial microorganisms in rice rhizosphere promotes host defense to blight-causing Xanthomonas oryzae pv. oryzae. PLANTA 2020; 252:106. [PMID: 33205288 DOI: 10.1007/s00425-020-03515-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 11/05/2020] [Indexed: 06/11/2023]
Abstract
Rice plants primed with beneficial microbes Bacillus amyloliquefaciens and Aspergillus spinulosporus with biocontrol potential against Xanthomonas oryzae pv. oryzae, provided protection from disease by reprogramming host defence response under pathogen challenge. Plant-beneficial microbe interactions taking place in the rhizosphere are widely used for growth promotion and mitigation of biotic stresses in plants. The present study aims to evaluate the defense network induced by beneficial microorganisms in the rice rhizosphere, and the three-way interaction involved upon inoculation with dreadful bacteria Xanthomonas oryzae pv. oryzae (Xoo). Differential expression of defense-related enzymes, proteins, and genes in rice variety Swarna primed with a microbial consortium of Bacillus amyloliquefaciens and Aspergillus spinulosporus were quantified in the presence and absence of Xoo. The time-based expression profile alterations in leaves under the five distinct treatments "(unprimed unchallenged, unprimed Xoo challenged, B. amyloliquefaciens primed and challenged, A. spinulosporus primed and challenged, B. amyloliquefaciens and A. spinulosporus consortium primed and challenged)" revealed differential early upregulation of SOD, PAL, PO, PPO activities and TPC content in beneficial microbes primed plants in comparison to unprimed challenged plants. The enhanced defense response in all the rice plants recruited with beneficial microbe was also reflected by reduced plant mortality and an increased plant dry biomass and chlorophyll content. Also, more than 550 protein spots were observed per gel by PD Quest software, a total of 55 differentially expressed protein spots were analysed used MALDI-TOF MS, out of which 48 spots were recognized with a significant score with direct or supporting roles in stress alleviation and disease resistance. qRT-PCR was carried out to compare the biochemical and proteomic data to mRNA levels. We conclude that protein biogenesis and alleviated resistance response may contribute to improved biotic stress adaptation. These results might accelerate the functional regulation of the Xoo-receptive proteins in the presence of beneficial rhizospheric microbes and their computation as promising molecular markers for superior disease management.
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Affiliation(s)
- Akansha Jain
- Division of Plant Biology, Bose Institute Centenary Campus, P 1/12, CIT Scheme, VII-M, Kankurgachi, Kolkata, West Bengal, 700054, India
| | - Anwesha Chatterjee
- Vijaygarh Jyotish Ray College, Jadavpur, Kolkata, West Bengal, 700032, India
| | - Sampa Das
- Division of Plant Biology, Bose Institute Centenary Campus, P 1/12, CIT Scheme, VII-M, Kankurgachi, Kolkata, West Bengal, 700054, India.
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Ghareeb RY, Alfy H, Fahmy AA, Ali HM, Abdelsalam NR. Utilization of Cladophora glomerata extract nanoparticles as eco-nematicide and enhancing the defense responses of tomato plants infected by Meloidogyne javanica. Sci Rep 2020; 10:19968. [PMID: 33203960 PMCID: PMC7672092 DOI: 10.1038/s41598-020-77005-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 11/05/2020] [Indexed: 12/19/2022] Open
Abstract
Tomato (Solanum Lycopersicum L.) is an important vegetable crop that belongs to the family Solanaceae. Root-knot nematodes reflect the highly critical economically damaging genera of phytoparasitic nematodes on tomato plants. In this study, the eco-nematicide activity of freshwater green macroalga Cladophora glomerata aqueous extract and their synthesized silver nanoparticles (Ag-NPs) against root-knot nematodes Meloidogyne javanica was investigated on tomato plants. The formation and chemical structure of Ag-NPs was examined. The aqueous extract from C. glomerata was applied against the root-knot nematodes besides the biosynthesized green silver nanoparticles with 100, 75, 50, and 25% (S, S/2, S/3, S/4) concentrations. To investigate the plant response toward the Green Synthesized Silver Nanoparticles (GSNPs) treatment, expression profiling of Phenylalanine Ammonia-Lyase (PAL), Poly Phenol Oxidase (PPO), and Peroxidase (POX) in tomato were examined using Quantitative Real-Time PCR (Q-PCR). The results indicated that GSNPs from C. glomerata exhibited the highest eco-nematicide activity in the laboratory bioassay on egg hatchability and juveniles (J2S) mortality of M. javanica compared with the chemical commercial nematicide Rugby 60%. Also, results showed a significant reduction in galls number, egg masses, females per root system/plant, and mortality of juveniles. The results of PAL and PPO enzyme expression for the control plants remained relatively stable, while the plant inoculated with nematode M. javanica as well as the activity of genes in scope was increased from 14 to 28 Days after Nematode Inoculation (DANI). These activities were improved in inoculated plants and treated with C. glomerata extract and their green syntheses of Ag-NPs and the other plants treated with Rugby 60% (4 mL/L). The greatest activities of the three enzymes were evident after 14 days after the nematode inoculation. It can be concluded that the green synthesized nanoparticles using C. glomerata could be used as potent nematicides against M. javanica which induces the immune system to defend against nematode infection.
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Affiliation(s)
- Rehab Y Ghareeb
- Plant Protection and Biomolecular Diagnosis Department, Arid Lands Cultivation Research Institute, The City of Scientific Research and Technological Applications, New Borg El Arab, Alexandria, 21934, Egypt.
| | - Hanan Alfy
- Plant Protection Research Institute, Field Crop Pests Department, Agricultural Research Center, Giza, 12627, Egypt
| | - Antwan A Fahmy
- Biotechnology Dep, Faculty of Agriculture, Ain Shams University, Ain Shams, 13766, Egypt
| | - Hayssam M Ali
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia.,Timber Trees Research Department, Agriculture Research Center, Sabahia Horticulture Research Station, Horticulture Research Institute, Alexandria, 21526, Egypt
| | - Nader R Abdelsalam
- Agricultural Botany Department, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria, 21531, Egypt.
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Overexpression of OsCM alleviates BLB stress via phytohormonal accumulation and transcriptional modulation of defense-related genes in Oryza sativa. Sci Rep 2020; 10:19520. [PMID: 33177639 PMCID: PMC7658211 DOI: 10.1038/s41598-020-76675-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 10/18/2020] [Indexed: 12/14/2022] Open
Abstract
Xanthomonas oryzae is a serious pathogen causing bacterial leaf blight (BLB) disease in rice, markedly reducing its yield. In this study, the rice chorismate mutase (OsCM) gene was overexpressed in a bacterial leaf blight-susceptible rice line to investigate the functional role of OsCM in response to bacterial leaf blight stress. We reported that overexpression of OsCM altered the downstream pathway of aromatic amino acids, mitigating pathogen stress by altering stress-responsive genes and hormonal accumulation. Phenotypic evaluation showed that the lesion length in the transgenic line was significantly lesser than that in the wild-type, suggesting greater resistance in the transgenic line. Further analysis revealed that OsCM expression induced phenylalanine accumulation and suppressed tyrosine accumulation in response to bacterial leaf blight stress. Furthermore, bacterial leaf blight stress induced genes downstream of the phenylpropanoid pathway in conjunction with OsCM, suggesting that the phenylpropanoid pathway is dependent on OsCM gene expression. We reported high SA and low JA accumulation in response to bacterial leaf blight stress in the transgenic line. This higher SA accumulation suggested that SA induces immune responses by functioning as a promoter of nonexpresser pathogenesis-related genes 1 (NPR1) transcriptional regulation. Xa7 expression was induced with increase in nonexpresser pathogenesis-related genes 1, which is thought to be responsible for Xa7 expression, which is responsible for mitigating bacterial leaf blight stress.
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Zeng X, Sheng J, Zhu F, Wei T, Zhao L, Hu X, Zheng X, Zhou F, Hu Z, Diao Y, Jin S. Genetic, transcriptional, and regulatory landscape of monolignol biosynthesis pathway in Miscanthus × giganteus. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:179. [PMID: 33117433 PMCID: PMC7590476 DOI: 10.1186/s13068-020-01819-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 10/16/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Miscanthus × giganteus is widely recognized as a promising lignocellulosic biomass crop due to its advantages of high biomass production, low environmental impacts, and the potential to be cultivated on marginal land. However, the high costs of bioethanol production still limit the current commercialization of lignocellulosic bioethanol. The lignin in the cell wall and its by-products released in the pretreatment step is the main component inhibiting the enzymatic reactions in the saccharification and fermentation processes. Hence, genetic modification of the genes involved in lignin biosynthesis could be a feasible strategy to overcome this barrier by manipulating the lignin content and composition of M. × giganteus. For this purpose, the essential knowledge of these genes and understanding the underlying regulatory mechanisms in M. × giganteus is required. RESULTS In this study, MgPAL1, MgPAL5, Mg4CL1, Mg4CL3, MgHCT1, MgHCT2, MgC3'H1, MgCCoAOMT1, MgCCoAOMT3, MgCCR1, MgCCR2, MgF5H, MgCOMT, and MgCAD were identified as the major monolignol biosynthetic genes in M. × giganteus based on genetic and transcriptional evidence. Among them, 12 genes were cloned and sequenced. By combining transcription factor binding site prediction and expression correlation analysis, MYB46, MYB61, MYB63, WRKY24, WRKY35, WRKY12, ERF021, ERF058, and ERF017 were inferred to regulate the expression of these genes directly. On the basis of these results, an integrated model was summarized to depict the monolignol biosynthesis pathway and the underlying regulatory mechanism in M. × giganteus. CONCLUSIONS This study provides a list of potential gene targets for genetic improvement of lignocellulosic biomass quality of M. × giganteus, and reveals the genetic, transcriptional, and regulatory landscape of the monolignol biosynthesis pathway in M. × giganteus.
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Affiliation(s)
- Xiaofei Zeng
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023 People’s Republic of China
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055 People’s Republic of China
| | - Jiajing Sheng
- School of Life Sciences, Nantong University, Nantong, 226019 People’s Republic of China
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Hubei Lotus Engineering Center, Wuhan University, Wuhan, 430072 People’s Republic of China
| | - Fenglin Zhu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Hubei Lotus Engineering Center, Wuhan University, Wuhan, 430072 People’s Republic of China
| | - Tianzi Wei
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055 People’s Republic of China
| | - Lingling Zhao
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Hubei Lotus Engineering Center, Wuhan University, Wuhan, 430072 People’s Republic of China
| | - Xiaohu Hu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Hubei Lotus Engineering Center, Wuhan University, Wuhan, 430072 People’s Republic of China
| | - Xingfei Zheng
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Hubei Lotus Engineering Center, Wuhan University, Wuhan, 430072 People’s Republic of China
| | - Fasong Zhou
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Hubei Lotus Engineering Center, Wuhan University, Wuhan, 430072 People’s Republic of China
| | - Zhongli Hu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Hubei Lotus Engineering Center, Wuhan University, Wuhan, 430072 People’s Republic of China
| | - Ying Diao
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023 People’s Republic of China
| | - Surong Jin
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070 People’s Republic of China
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Coomey JH, Sibout R, Hazen SP. Grass secondary cell walls, Brachypodium distachyon as a model for discovery. THE NEW PHYTOLOGIST 2020; 227:1649-1667. [PMID: 32285456 DOI: 10.1111/nph.16603] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 03/05/2020] [Indexed: 05/20/2023]
Abstract
A key aspect of plant growth is the synthesis and deposition of cell walls. In specific tissues and cell types including xylem and fibre, a thick secondary wall comprised of cellulose, hemicellulose and lignin is deposited. Secondary cell walls provide a physical barrier that protects plants from pathogens, promotes tolerance to abiotic stresses and fortifies cells to withstand the forces associated with water transport and the physical weight of plant structures. Grasses have numerous cell wall features that are distinct from eudicots and other plants. Study of the model species Brachypodium distachyon as well as other grasses has revealed numerous features of the grass cell wall. These include the characterisation of xylosyl and arabinosyltransferases, a mixed-linkage glucan synthase and hydroxycinnamate acyltransferases. Perhaps the most fertile area for discovery has been the formation of lignins, including the identification of novel substrates and enzyme activities towards the synthesis of monolignols. Other enzymes function as polymerising agents or transferases that modify lignins and facilitate interactions with polysaccharides. The regulatory aspects of cell wall biosynthesis are largely overlapping with those of eudicots, but salient differences among species have been resolved that begin to identify the determinants that define grass cell walls.
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Affiliation(s)
- Joshua H Coomey
- Biology Department, University of Massachusetts, Amherst, MA, 01003, USA
- Plant Biology Graduate Program, University of Massachusetts, Amherst, MA, 01003, USA
| | - Richard Sibout
- Biopolymères Interactions Assemblages, INRAE, UR BIA, F-44316, Nantes, France
| | - Samuel P Hazen
- Biology Department, University of Massachusetts, Amherst, MA, 01003, USA
- Plant Biology Graduate Program, University of Massachusetts, Amherst, MA, 01003, USA
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56
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Weiss R, Guebitz GM, Pellis A, Nyanhongo GS. Harnessing the Power of Enzymes for Tailoring and Valorizing Lignin. Trends Biotechnol 2020; 38:1215-1231. [PMID: 32423726 DOI: 10.1016/j.tibtech.2020.03.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 03/17/2020] [Accepted: 03/19/2020] [Indexed: 02/07/2023]
Abstract
Lignin, a structural component of lignocellulosic plants, is an alternative raw material with enormous potential to replace diminishing fossil-based resources for the sustainable production of many chemicals and materials. Unfortunately, lignin's heterogeneity, low reactivity, and strong intra- and intermolecular hydrogen interactions and modifications introduced during the pulping process present significant technical challenges. However, the increasing ability to tailor lignin biosynthesis pathways by targeting enzymes and the continued discovery of more robust biocatalysts are enabling the synthesis of novel valuable products. This review summarizes how enzymes involved in lignin biosynthesis pathways and microbial enzymes are being harnessed to produce chemicals and materials and to upgrade lignin properties for the synthesis of a variety of value-added lignin industrial products.
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Affiliation(s)
- Renate Weiss
- University of Natural Resources and Life Sciences, Vienna, Institute of Environmental Biotechnology, Konrad Lorenz Straße 20, 3430, Tulln an der Donau, Austria
| | - Georg M Guebitz
- University of Natural Resources and Life Sciences, Vienna, Institute of Environmental Biotechnology, Konrad Lorenz Straße 20, 3430, Tulln an der Donau, Austria; Austrian Centre for Industrial Biotechnology (ACIB), Konrad Lorenz Strasse 20, 3430, Tulln an der Donau, Austria
| | - Alessandro Pellis
- University of Natural Resources and Life Sciences, Vienna, Institute of Environmental Biotechnology, Konrad Lorenz Straße 20, 3430, Tulln an der Donau, Austria
| | - Gibson S Nyanhongo
- University of Natural Resources and Life Sciences, Vienna, Institute of Environmental Biotechnology, Konrad Lorenz Straße 20, 3430, Tulln an der Donau, Austria; Austrian Centre for Industrial Biotechnology (ACIB), Konrad Lorenz Strasse 20, 3430, Tulln an der Donau, Austria.
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57
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Yadav V, Wang Z, Wei C, Amo A, Ahmed B, Yang X, Zhang X. Phenylpropanoid Pathway Engineering: An Emerging Approach towards Plant Defense. Pathogens 2020; 9:pathogens9040312. [PMID: 32340374 PMCID: PMC7238016 DOI: 10.3390/pathogens9040312] [Citation(s) in RCA: 157] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/11/2020] [Accepted: 04/17/2020] [Indexed: 11/23/2022] Open
Abstract
Pathogens hitting the plant cell wall is the first impetus that triggers the phenylpropanoid pathway for plant defense. The phenylpropanoid pathway bifurcates into the production of an enormous array of compounds based on the few intermediates of the shikimate pathway in response to cell wall breaches by pathogens. The whole metabolomic pathway is a complex network regulated by multiple gene families and it exhibits refined regulatory mechanisms at the transcriptional, post-transcriptional, and post-translational levels. The pathway genes are involved in the production of anti-microbial compounds as well as signaling molecules. The engineering in the metabolic pathway has led to a new plant defense system of which various mechanisms have been proposed including salicylic acid and antimicrobial mediated compounds. In recent years, some key players like phenylalanine ammonia lyases (PALs) from the phenylpropanoid pathway are proposed to have broad spectrum disease resistance (BSR) without yield penalties. Now we have more evidence than ever, yet little understanding about the pathway-based genes that orchestrate rapid, coordinated induction of phenylpropanoid defenses in response to microbial attack. It is not astonishing that mutants of pathway regulator genes can show conflicting results. Therefore, precise engineering of the pathway is an interesting strategy to aim at profitably tailored plants. Here, this review portrays the current progress and challenges for phenylpropanoid pathway-based resistance from the current prospective to provide a deeper understanding.
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Affiliation(s)
- Vivek Yadav
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of horticulture, Northwest A&F University, Xianyang 712100, China; (V.Y.); (Z.W.); (C.W.); (B.A.); (X.Y.)
| | - Zhongyuan Wang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of horticulture, Northwest A&F University, Xianyang 712100, China; (V.Y.); (Z.W.); (C.W.); (B.A.); (X.Y.)
| | - Chunhua Wei
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of horticulture, Northwest A&F University, Xianyang 712100, China; (V.Y.); (Z.W.); (C.W.); (B.A.); (X.Y.)
| | - Aduragbemi Amo
- College of Agronomy, Northwest A&F University, Xianyang 712100, China;
| | - Bilal Ahmed
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of horticulture, Northwest A&F University, Xianyang 712100, China; (V.Y.); (Z.W.); (C.W.); (B.A.); (X.Y.)
| | - Xiaozhen Yang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of horticulture, Northwest A&F University, Xianyang 712100, China; (V.Y.); (Z.W.); (C.W.); (B.A.); (X.Y.)
| | - Xian Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of horticulture, Northwest A&F University, Xianyang 712100, China; (V.Y.); (Z.W.); (C.W.); (B.A.); (X.Y.)
- Correspondence: ; Tel.: +86-029-8708-2613
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Lefevere H, Bauters L, Gheysen G. Salicylic Acid Biosynthesis in Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:338. [PMID: 32362901 PMCID: PMC7182001 DOI: 10.3389/fpls.2020.00338] [Citation(s) in RCA: 205] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 03/06/2020] [Indexed: 05/19/2023]
Abstract
Salicylic acid (SA) is an important plant hormone that is best known for mediating host responses upon pathogen infection. Its role in plant defense activation is well established, but its biosynthesis in plants is not fully understood. SA is considered to be derived from two possible pathways; the ICS and PAL pathway, both starting from chorismate. The importance of both pathways for biosynthesis differs between plant species, rendering it hard to make generalizations about SA production that cover the entire plant kingdom. Yet, understanding SA biosynthesis is important to gain insight into how plant pathogen responses function and how pathogens can interfere with them. In this review, we have taken a closer look at how SA is synthesized and the importance of both biosynthesis pathways in different plant species.
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Affiliation(s)
| | | | - Godelieve Gheysen
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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59
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Polo CC, Pereira L, Mazzafera P, Flores-Borges DNA, Mayer JLS, Guizar-Sicairos M, Holler M, Barsi-Andreeta M, Westfahl H, Meneau F. Correlations between lignin content and structural robustness in plants revealed by X-ray ptychography. Sci Rep 2020; 10:6023. [PMID: 32265529 PMCID: PMC7138792 DOI: 10.1038/s41598-020-63093-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 03/10/2020] [Indexed: 11/08/2022] Open
Abstract
Lignin is a heterogeneous aromatic polymer responsible for cell wall stiffness and protection from pathogen attack. However, lignin represents a bottleneck to biomass degradation due to its recalcitrance related to the natural cell wall resistance to release sugars for fermentation or further processing. A biological approach involving genetics and molecular biology was used to disrupt lignin pathway synthesis and decrease lignin deposition. Here, we imaged three-dimensional fragments of the petioles of wild type and C4H lignin mutant Arabidopsis thaliana plants by synchrotron cryo-ptychography. The three-dimensional images revealed the heterogeneity of vessels, parenchyma, and fibre cell wall morphologies, highlighting the relation between disturbed lignin deposition and vessel implosion (cell collapsing and obstruction of water flow). We introduce a new parameter to accurately define cell implosion conditions in plants, and we demonstrate how cryo-ptychographic X-ray computed tomography (cryo-PXCT) provides new insights for plant imaging in three dimensions to understand physiological processes.
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Affiliation(s)
- Carla C Polo
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970, Campinas, SP, Brazil.
| | - Luciano Pereira
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
- Department of Plant Biology, Institute of Biology, P.O. Box 6109, University of Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil
| | - Paulo Mazzafera
- Department of Plant Biology, Institute of Biology, P.O. Box 6109, University of Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil
- Departament of Crop Science, College of Agriculture "Luiz de Queiroz", University of São Paulo (ESALQ-USP), CP 09, 13418-900, Piracicaba, SP, Brazil
| | - Denisele N A Flores-Borges
- Departament of Crop Science, College of Agriculture "Luiz de Queiroz", University of São Paulo (ESALQ-USP), CP 09, 13418-900, Piracicaba, SP, Brazil
| | - Juliana L S Mayer
- Departament of Crop Science, College of Agriculture "Luiz de Queiroz", University of São Paulo (ESALQ-USP), CP 09, 13418-900, Piracicaba, SP, Brazil
| | | | - Mirko Holler
- Paul Scherrer Institute, Villigen, PSI, Switzerland
| | - Mariane Barsi-Andreeta
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970, São Carlos, SP, Brazil
| | - Harry Westfahl
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970, Campinas, SP, Brazil
| | - Florian Meneau
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970, Campinas, SP, Brazil.
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Xu JJ, Fang X, Li CY, Yang L, Chen XY. General and specialized tyrosine metabolism pathways in plants. ABIOTECH 2020; 1:97-105. [PMID: 36304719 PMCID: PMC9590561 DOI: 10.1007/s42994-019-00006-w] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 08/06/2019] [Indexed: 11/25/2022]
Abstract
The tyrosine metabolism pathway serves as a starting point for the production of a variety of structurally diverse natural compounds in plants, such as tocopherols, plastoquinone, ubiquinone, betalains, salidroside, benzylisoquinoline alkaloids, and so on. Among these, tyrosine-derived metabolites, tocopherols, plastoquinone, and ubiquinone are essential to plant survival. In addition, this pathway provides us essential micronutrients (e.g., vitamin E and ubiquinone) and medicine (e.g., morphine, salidroside, and salvianolic acid B). However, our knowledge of the plant tyrosine metabolism pathway remains rudimentary, and genes encoding the pathway enzymes have not been fully defined. In this review, we summarize and discuss recent advances in the tyrosine metabolism pathway, key enzymes, and important tyrosine-derived metabolites in plants.
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Affiliation(s)
- Jing-Jing Xu
- Shanghai Key Laboratory of Plant Functional Genomics and Resources, Plant Science Research Center, Shanghai Chenshan Botanical Garden, Shanghai, 201602 People’s Republic of China
| | - Xin Fang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming, Kunming, 650201 Yunnan People’s Republic of China
| | - Chen-Yi Li
- State Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences/Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032 People’s Republic of China
- University of Chinese Academy of Sciences, Shanghai, 200032 People’s Republic of China
| | - Lei Yang
- Shanghai Key Laboratory of Plant Functional Genomics and Resources, Plant Science Research Center, Shanghai Chenshan Botanical Garden, Shanghai, 201602 People’s Republic of China
| | - Xiao-Ya Chen
- Shanghai Key Laboratory of Plant Functional Genomics and Resources, Plant Science Research Center, Shanghai Chenshan Botanical Garden, Shanghai, 201602 People’s Republic of China
- State Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences/Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032 People’s Republic of China
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Liu F, Xu Y, Wang H, Zhou Y, Cheng B, Li X. APETALA 2 transcription factor CBX1 is a regulator of mycorrhizal symbiosis and growth of Lotus japonicus. PLANT CELL REPORTS 2020; 39:445-455. [PMID: 31912218 DOI: 10.1007/s00299-019-02501-2] [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] [Received: 08/21/2019] [Accepted: 12/11/2019] [Indexed: 06/10/2023]
Abstract
An AP2 family gene CBX1 is involved in mycorrhizal symbiosis and growth of Lotus japonicus. APETALA 2 (AP2) transcriptional regulator is highly conserved in plants. CBX1 from Lotus japonicus is a member of AP2 family. AMF (Arbuscular mycorrhizal fungi) inoculation experiment demonstrated that expression of CBX1 was significantly induced by AMF. Further promoter analysis showed that the - 764 to - 498 bp region of the CBX1 promoter containing CTTC motif is the AMF responsive region. Functional analysis of cbx1 mutant suggested CBX1 is critical for mycorrhizal symbiosis, especially for arbuscule formation. Moreover, under noncolonized condition, overexpression of CBX1 reduced the root length of L. japonicus but increased the size of root system and shoot length, whereas cbx1 mutant reduced the root size and shoot length, but not effect on root length. In addition, cbx1 altered activity of monolignol biosynthetic gene and increased lignin levels. Collectively, these data indicated that CBX1 is a positive regulator of symbiotic activity and plays roles in the growth of L. japonicus.
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Affiliation(s)
- Fang Liu
- Key Laboratory of Crop Biology of Anhui Province, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China
| | - Yunjian Xu
- Key Laboratory of Crop Biology of Anhui Province, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China
| | - Hequn Wang
- Key Laboratory of Crop Biology of Anhui Province, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China
| | - Yuan Zhou
- Key Laboratory of Crop Biology of Anhui Province, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China
| | - Beijiu Cheng
- Key Laboratory of Crop Biology of Anhui Province, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China
| | - Xiaoyu Li
- Key Laboratory of Crop Biology of Anhui Province, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China.
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, China.
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Wang S, Liu S, Liu L, Li R, Guo R, Xia X, Wei C. miR477 targets the phenylalanine ammonia-lyase gene and enhances the susceptibility of the tea plant (Camellia sinensis) to disease during Pseudopestalotiopsis species infection. PLANTA 2020; 251:59. [PMID: 32025888 DOI: 10.1007/s00425-020-03353-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 01/30/2020] [Indexed: 05/14/2023]
Abstract
MAIN CONCLUSION: miR477 acts as a negative regulator in tea plant immunity against Pseudopestalotiopsis infection by repressing the expression of its target gene PAL. MicroRNA (miRNA)-mediated post-transcriptional regulation plays a fundamental role in various plant physiological processes, including responses to pathogens. Our previous research revealed that miR477 might be involved in the tea plant-Pseudopestalotiopsis interaction (data not shown). In the present study, the accumulation of miR477 significantly decreased in tea plants during Pseudopestalotiopsis species infection. Using miRNA and degradome data sets, the targeting of phenylalanine ammonia-lyase (PAL) by miR477 was validated by 5' RLM-RACE. GUS assay showed that the expression of PAL was post-transcriptionally regulated by miR477 and silenced by mRNA cleavage. A negative correlation between the expression of miR477 and PAL was found in tea plants infected by the pathogen. The transgenic lines overexpressing Csn-miR477 exhibited increased susceptibility to Pseudopestalotiopsis species, which was associated with reduced expression of PAL during infection. The degree of severity of the leaf lesions and the results of trypan blue staining showed that the plants overexpressing Csn-miR477 exhibited more severe damage upon pathogen infection than wild-type plants. In addition, more H2O2 and O2-, higher malondialdehyde (MDA) contents and less superoxide dismutase (SOD) and peroxidase (POD) activities were detected in the transgenic plants than in the wild-type plants after inoculation with Pseudopestalotiopsis species. Taken together, our results implied that Csn-miR477 might act as a negative regulator in pathogen-infected tea plants by inhibiting the expression of its target, PAL, and that Csn-miR477 is a candidate miRNA for improving the adaptation of tea plant to disease.
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Affiliation(s)
- Shuangshuang Wang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, People's Republic of China
| | - Shengrui Liu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, People's Republic of China
| | - Lu Liu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, People's Republic of China
| | - Rui Li
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, People's Republic of China
| | - Rui Guo
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, People's Republic of China
| | - Xiaobo Xia
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, People's Republic of China
| | - Chaoling Wei
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, People's Republic of China.
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Identification and characterization of genes frequently responsive to Xanthomonas oryzae pv. oryzae and Magnaporthe oryzae infections in rice. BMC Genomics 2020; 21:21. [PMID: 31906847 PMCID: PMC6945429 DOI: 10.1186/s12864-019-6438-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 12/29/2019] [Indexed: 01/06/2023] Open
Abstract
Background Disease resistance is an important factor that impacts rice production. However, the mechanisms underlying rice disease resistance remain to be elucidated. Results Here, we show that a robust set of genes has been defined in rice response to the infections of Xanthomonas oryzae pv. oryzae (Xoo) and Magnaporthe oryzae (Mor). We conducted a comprehensive analysis of the available microarray data from a variety of rice samples with inoculation of Xoo and Mor. A set of 12,932 genes was identified to be regulated by Xoo and another set of 2709 Mor-regulated genes was determined. GO enrichment analysis of the regulated genes by Xoo or Mor suggested mitochondrion may be an arena for the up-regulated genes and chloroplast be another for the down-regulated genes by Xoo or Mor. Cytokinin-related processes were most frequently repressed by Xoo, while processes relevant to jasmonic acid and abscisic acid were most frequently activated by Xoo and Mor. Among genes responsive to Xoo and Mor, defense responses and diverse signaling pathways were the most frequently enriched resistance mechanisms. InterPro annotation showed the zinc finger domain family, WRKY proteins, and Myb domain proteins were the most significant transcription factors regulated by Xoo and Mor. KEGG analysis demonstrated pathways including ‘phenylpropanoid biosynthesis’, ‘biosynthesis of antibiotics’, ‘phenylalanine metabolism’, and ‘biosynthesis of secondary metabolites’ were most frequently triggered by Xoo and Mor, whereas ‘circadian rhythm-plant’ was the most frequent pathway repressed by Xoo and Mor. Conclusions The genes identified here represent a robust set of genes responsive to the infections of Xoo and Mor, which provides an overview of transcriptional reprogramming during rice defense against Xoo and Mor infections. Our study would be helpful in understanding the mechanisms of rice disease resistance.
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Barros J, Dixon RA. Plant Phenylalanine/Tyrosine Ammonia-lyases. TRENDS IN PLANT SCIENCE 2020; 25:66-79. [PMID: 31679994 DOI: 10.1016/j.tplants.2019.09.011] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 09/12/2019] [Accepted: 09/13/2019] [Indexed: 05/13/2023]
Abstract
Aromatic amino acid deaminases are key enzymes mediating carbon flux from primary to secondary metabolism in plants. Recent studies have uncovered a tyrosine ammonia-lyase that contributes to the typical characteristics of grass cell walls and contributes to about 50% of the total lignin synthesized by the plant. Grasses are currently preferred bioenergy feedstocks and lignin is the most important limiting factor in the conversion of plant biomass to liquid biofuels, as well as being an abundant renewable carbon source that can be industrially exploited. Further research on the structure, evolution, regulation, and biological function of functionally distinct ammonia-lyases has multiple implications for improving the economics of the agri-food and biofuel industries.
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Affiliation(s)
- Jaime Barros
- BioDiscovery Institute, University of North Texas, Denton, TX 76203, USA; Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA; Center for Bioenergy Innovation (CBI), Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Richard A Dixon
- BioDiscovery Institute, University of North Texas, Denton, TX 76203, USA; Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA; Center for Bioenergy Innovation (CBI), Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
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Li C, He Q, Zhang F, Yu J, Li C, Zhao T, Zhang Y, Xie Q, Su B, Mei L, Zhu S, Chen J. Melatonin enhances cotton immunity to Verticillium wilt via manipulating lignin and gossypol biosynthesis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 100:784-800. [PMID: 31349367 PMCID: PMC6899791 DOI: 10.1111/tpj.14477] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 07/03/2019] [Accepted: 07/15/2019] [Indexed: 05/09/2023]
Abstract
Plants endure challenging environments in which they are constantly threatened by diverse pathogens. The soil-borne fungus Verticillium dahliae is a devastating pathogen affecting many plant species including cotton, in which it significantly reduces crop yield and fiber quality. Melatonin involvement in plant immunity to pathogens has been reported, but the mechanisms of melatonin-induced plant resistance are unclear. In this study, the role of melatonin in enhancing cotton resistance to V. dahliae was investigated. At the transcriptome level, exogenous melatonin increased the expression of genes in phenylpropanoid, mevalonate (MVA), and gossypol pathways after V. dahliae inoculation. As a result, lignin and gossypol, the products of these metabolic pathways, significantly increased. Silencing the serotonin N-acetyltransferase 1 (GhSNAT1) and caffeic acid O-methyltransferase (GhCOMT) melatonin biosynthesis genes compromised cotton resistance, with reduced lignin and gossypol levels after V. dahliae inoculation. Exogenous melatonin pre-treatment prior to V. dahliae inoculation restored the level of cotton resistance reduced by the above gene silencing effects. Melatonin levels were higher in resistant cotton cultivars than in susceptible cultivars after V. dahliae inoculation. The findings indicate that melatonin affects lignin and gossypol synthesis genes in phenylpropanoid, MVA, and gossypol pathways, thereby enhancing cotton resistance to V. dahliae.
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Affiliation(s)
- Cheng Li
- Zhejiang Key Laboratory of Crop GermplasmZhejiang UniversityHangzhou310058China
- Institute of Crop ScienceZhejiang UniversityHangzhou310058China
| | - Qiuling He
- Zhejiang Key Laboratory of Plant Secondary Metabolism and RegulationZhejiang Sci‐Tech UniversityHangzhou310018China
| | - Fan Zhang
- Zhejiang Key Laboratory of Crop GermplasmZhejiang UniversityHangzhou310058China
- Institute of Crop ScienceZhejiang UniversityHangzhou310058China
| | - Jingwen Yu
- Zhejiang Key Laboratory of Crop GermplasmZhejiang UniversityHangzhou310058China
- Institute of Crop ScienceZhejiang UniversityHangzhou310058China
| | - Cong Li
- Zhejiang Key Laboratory of Crop GermplasmZhejiang UniversityHangzhou310058China
- Institute of Crop ScienceZhejiang UniversityHangzhou310058China
| | - Tianlun Zhao
- Zhejiang Key Laboratory of Crop GermplasmZhejiang UniversityHangzhou310058China
- Institute of Crop ScienceZhejiang UniversityHangzhou310058China
| | - Yi Zhang
- Zhejiang Key Laboratory of Crop GermplasmZhejiang UniversityHangzhou310058China
- Institute of Crop ScienceZhejiang UniversityHangzhou310058China
| | - Qianwen Xie
- Zhejiang Key Laboratory of Crop GermplasmZhejiang UniversityHangzhou310058China
- Institute of Crop ScienceZhejiang UniversityHangzhou310058China
| | - Bangrong Su
- Zhejiang Key Laboratory of Crop GermplasmZhejiang UniversityHangzhou310058China
- Institute of Crop ScienceZhejiang UniversityHangzhou310058China
| | - Lei Mei
- Zhejiang Key Laboratory of Crop GermplasmZhejiang UniversityHangzhou310058China
- Institute of Crop ScienceZhejiang UniversityHangzhou310058China
| | - Shuijin Zhu
- Zhejiang Key Laboratory of Crop GermplasmZhejiang UniversityHangzhou310058China
- Institute of Crop ScienceZhejiang UniversityHangzhou310058China
| | - Jinhong Chen
- Zhejiang Key Laboratory of Crop GermplasmZhejiang UniversityHangzhou310058China
- Institute of Crop ScienceZhejiang UniversityHangzhou310058China
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Hou L, Wang L, Wu X, Gao W, Zhang J, Huang C. Expression patterns of two pal genes of Pleurotus ostreatus across developmental stages and under heat stress. BMC Microbiol 2019; 19:231. [PMID: 31655558 PMCID: PMC6815457 DOI: 10.1186/s12866-019-1594-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Accepted: 09/10/2019] [Indexed: 12/03/2022] Open
Abstract
Background Phenylalanine ammonia-lyase (PAL, EC 4.3.1.24) is the first key enzyme in the phenylpropanoid pathway. The pal gene has been widely studied in plants and participates in plant growth, development and defense systems. However, in Pleurotus ostreatus, the biological functions of pal during organismal development and exposure to abiotic stress have not been reported. Results In this study, we cloned and characterized the pal1 (2232 bp) and pal2 (2244 bp) genes from the basidiomycete P. ostreatus CCMSSC 00389. The pal1 and pal2 genes are interrupted by 6 and 10 introns, respectively, and encode proteins of 743 and 747 amino acids, respectively. Furthermore, prokaryotic expression experiments showed that PAL enzymes catalyzed the conversion of L-phenylalanine to trans-cinnamic acid. The function of pal1 and pal2 was determined by constructing overexpression (OE) and RNA interference (RNAi) strains. The results showed that the two pal genes had similar expression patterns during different developmental stages. The expression of pal genes was higher in the reproductive growth stage than in the vegetative growth stage. And the interference of pal1 and pal2 delayed the formation of primordia. The results of heat stress assays showed that the RNAi-pal1 strains had enhanced mycelial tolerance to high temperature, while the RNAi-pal2 strains had enhanced mycelial resistance to H2O2. Conclusions These results indicate that two pal genes may play a similar role in the development of P. ostreatus fruiting bodies, but may alleviate stress through different regulatory pathways under heat stress.
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Affiliation(s)
- Ludan Hou
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Microbial Resources, Ministry of Agriculture and Rural Affairs, 12 Zhongguancun South Street, Beijing, 100081, China
| | - Lining Wang
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Microbial Resources, Ministry of Agriculture and Rural Affairs, 12 Zhongguancun South Street, Beijing, 100081, China
| | - Xiangli Wu
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Microbial Resources, Ministry of Agriculture and Rural Affairs, 12 Zhongguancun South Street, Beijing, 100081, China
| | - Wei Gao
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Microbial Resources, Ministry of Agriculture and Rural Affairs, 12 Zhongguancun South Street, Beijing, 100081, China
| | - Jinxia Zhang
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Microbial Resources, Ministry of Agriculture and Rural Affairs, 12 Zhongguancun South Street, Beijing, 100081, China
| | - Chenyang Huang
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China. .,Key Laboratory of Microbial Resources, Ministry of Agriculture and Rural Affairs, 12 Zhongguancun South Street, Beijing, 100081, China.
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Ferreira SS, Simões MS, Carvalho GG, de Lima LGA, Svartman RMDA, Cesarino I. The lignin toolbox of the model grass Setaria viridis. PLANT MOLECULAR BIOLOGY 2019; 101:235-255. [PMID: 31254267 DOI: 10.1007/s11103-019-00897-9] [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: 02/28/2019] [Accepted: 06/25/2019] [Indexed: 05/21/2023]
Abstract
The core set of biosynthetic genes potentially involved in developmental lignification was identified in the model C4 grass Setaria viridis. Lignin has been recognized as a major recalcitrant factor negatively affecting the processing of plant biomass into bioproducts. However, the efficient manipulation of lignin deposition in order to generate optimized crops for the biorefinery requires a fundamental knowledge of several aspects of lignin metabolism, including regulation, biosynthesis and polymerization. The current availability of an annotated genome for the model grass Setaria viridis allows the genome-wide characterization of genes involved in the metabolic pathway leading to the production of monolignols, the main building blocks of lignin. Here we performed a comprehensive study of monolignol biosynthetic genes as an initial step into the characterization of lignin metabolism in S. viridis. A total of 56 genes encoding bona fide enzymes catalyzing the consecutive ten steps of the monolignol biosynthetic pathway were identified in the S. viridis genome. A combination of comparative phylogenetic studies, high-throughput expression analysis and quantitative RT-PCR analysis was further employed to identify the family members potentially involved in developmental lignification. Accordingly, 14 genes clustered with genes from closely related species with a known function in lignification and showed an expression pattern that correlates with lignin deposition. These genes were considered the "core lignin toolbox" responsible for the constitutive, developmental lignification in S. viridis. These results provide the basis for further understanding lignin deposition in C4 grasses and will ultimately allow the validation of biotechnological strategies to produce crops with enhanced processing properties.
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Affiliation(s)
- Sávio Siqueira Ferreira
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, São Paulo, 05508-900, Brazil
| | - Marcella Siqueira Simões
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, São Paulo, 05508-900, Brazil
| | - Gabriel Garon Carvalho
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, São Paulo, 05508-900, Brazil
| | - Leydson Gabriel Alves de Lima
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, São Paulo, 05508-900, Brazil
| | | | - Igor Cesarino
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, São Paulo, 05508-900, Brazil.
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Wang R, Wang GL, Ning Y. PALs: Emerging Key Players in Broad-Spectrum Disease Resistance. TRENDS IN PLANT SCIENCE 2019; 24:785-787. [PMID: 31300196 DOI: 10.1016/j.tplants.2019.06.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/19/2019] [Accepted: 06/21/2019] [Indexed: 05/21/2023]
Abstract
Phenylalanine ammonia lyases (PALs) are involved in resistance to plant pathogens, but the mechanism by which they contribute to plant immunity is unclear. Two recent studies provide direct evidence for PALs' contributions to rice broad-spectrum resistance (BSR) mediated by nucleotide-binding domain and leucine-rich repeat-containing (NLR) proteins and RNA-binding proteins (Zhai et al., Mol. Cell, 2019; Zhou et al., Proc. Natl. Acad. Sci. U. S. A., 2018).
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Affiliation(s)
- Ruyi Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Guo-Liang Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Department of Plant Pathology, the Ohio State University, Columbus, OH 43210, USA.
| | - Yuese Ning
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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Transcriptome analysis and codominant markers development in caper, a drought tolerant orphan crop with medicinal value. Sci Rep 2019; 9:10411. [PMID: 31320697 PMCID: PMC6639398 DOI: 10.1038/s41598-019-46613-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 06/27/2019] [Indexed: 01/08/2023] Open
Abstract
Caper (Capparis spinosa L.) is a xerophytic shrub cultivated for its flower buds and fruits, used as food and for their medicinal properties. Breeding programs and even proper taxonomic classification of the genus Capparis has been hampered so far by the lack of reliable genetic information and molecular markers. Here, we present the first genomic resource for C. spinosa, generated by transcriptomic approach and de novo assembly. The sequencing effort produced nearly 80 million clean reads assembled into 124,723 unitranscripts. Careful annotation and comparison with public databases revealed homologs to genes with a key role in important metabolic pathways linked to abiotic stress tolerance and bio-compounds production, such purine, thiamine and phenylpropanoid biosynthesis, α-linolenic acid and lipid metabolism. Additionally, a panel of genes involved in stomatal development/distribution and encoding for Stress Associated Proteins (SAPs) was also identified. We also used the transcriptomic data to uncover novel molecular markers for caper. Out of 50 SSRs tested, 14 proved polymorphic and represent the first set of SSR markers for the genus Capparis. This transcriptome will be an important contribution to future studies and breeding programs for this orphan crop, aiding to the development of improved varieties to sustain agriculture in arid conditions.
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Gutsch A, Sergeant K, Keunen E, Prinsen E, Guerriero G, Renaut J, Hausman JF, Cuypers A. Does long-term cadmium exposure influence the composition of pectic polysaccharides in the cell wall of Medicago sativa stems? BMC PLANT BIOLOGY 2019; 19:271. [PMID: 31226937 PMCID: PMC6588869 DOI: 10.1186/s12870-019-1859-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 05/30/2019] [Indexed: 05/18/2023]
Abstract
BACKGROUND The heavy metal cadmium (Cd) accumulates in the environment due to anthropogenic influences. It is unessential and harmful to all life forms. The plant cell wall forms a physical barrier against environmental stress and changes in the cell wall structure have been observed upon Cd exposure. In the current study, changes in the cell wall composition and structure of Medicago sativa stems were investigated after long-term exposure to Cd. Liquid chromatography coupled to mass spectrometry (LC-MS) for quantitative protein analysis was complemented with targeted gene expression analysis and combined with analyses of the cell wall composition. RESULTS Several proteins determining for the cell wall structure changed in abundance. Structural changes mainly appeared in the composition of pectic polysaccharides and data indicate an increased presence of xylogalacturonan in response to Cd. Although a higher abundance and enzymatic activity of pectin methylesterase was detected, the total pectin methylation was not affected. CONCLUSIONS An increased abundance of xylogalacturonan might hinder Cd binding in the cell wall due to the methylation of its galacturonic acid backbone. Probably, the exclusion of Cd from the cell wall and apoplast limits the entry of the heavy metal into the symplast and is an important factor during tolerance acquisition.
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Affiliation(s)
- Annelie Gutsch
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 5, avenue des Hauts-Fourneaux, 4362 Esch-sur-Alzette, Luxembourg
- Centre for Environmental Sciences, Hasselt University, Agoralaan building D, 3590 Diepenbeek, Belgium
| | - Kjell Sergeant
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 5, avenue des Hauts-Fourneaux, 4362 Esch-sur-Alzette, Luxembourg
| | - Els Keunen
- Centre for Environmental Sciences, Hasselt University, Agoralaan building D, 3590 Diepenbeek, Belgium
| | - Els Prinsen
- Integrated Molecular Plant Research, Department of Biology, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Gea Guerriero
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 5, avenue des Hauts-Fourneaux, 4362 Esch-sur-Alzette, Luxembourg
| | - Jenny Renaut
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 5, avenue des Hauts-Fourneaux, 4362 Esch-sur-Alzette, Luxembourg
| | - Jean-Francois Hausman
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 5, avenue des Hauts-Fourneaux, 4362 Esch-sur-Alzette, Luxembourg
| | - Ann Cuypers
- Centre for Environmental Sciences, Hasselt University, Agoralaan building D, 3590 Diepenbeek, Belgium
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Low Lignin Mutants and Reduction of Lignin Content in Grasses for Increased Utilisation of Lignocellulose. AGRONOMY-BASEL 2019. [DOI: 10.3390/agronomy9050256] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Biomass rich in lignocellulose from grasses is a major source for biofuel production and animal feed. However, the presence of lignin in cell walls limits its efficient utilisation such as in its bioconversion to biofuel. Reduction of the lignin content or alteration of its structure in crop plants have been pursued, either by regulating genes encoding enzymes in the lignin biosynthetic pathway using biotechnological techniques or by breeding naturally-occurring low lignin mutant lines. The aim of this review is to provide a summary of these studies, focusing on lignin (monolignol) biosynthesis and composition in grasses and, where possible, the impact on recalcitrance to bioconversion. An overview of transgenic crops of the grass family with regulated gene expression in lignin biosynthesis is presented, including the effect on lignin content and changes in the ratio of p-hydroxyphenyl (H), guaiacyl (G) and syringyl (S) units. Furthermore, a survey is provided of low-lignin mutants in grasses, including cereals in particular, summarising their origin and phenotypic traits together with genetics and the molecular function of the various genes identified.
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Cui M, Wu D, Bao K, Wen Z, Hao Y, Luo L. Dynamic changes of phenolic compounds during artificial aging of soybean seeds identified by high-performance liquid chromatography coupled with transcript analysis. Anal Bioanal Chem 2019; 411:3091-3101. [PMID: 31011785 DOI: 10.1007/s00216-019-01767-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 02/15/2019] [Accepted: 03/07/2019] [Indexed: 12/16/2022]
Abstract
Phenolic compounds are important bioactive substances in plants, but study of their alteration during soybean seed aging is still limited. In this study, we conducted artificial aging on soybean seeds, detected the dynamic changes of phenolic compound concentrations using high-performance liquid chromatography, and analyzed the gene expression of key enzymes of phenolic metabolism. A detailed method for detection of 19 phenolic compounds during artificial aging of soybean seeds was constructed, and all of these phenols significantly changed in concentration. The content of protocatechuic acid, rutin, and morin decreased, whereas that of daidzein, glycitein, genistein, and baicalin increased. The concentration of caffeic acid, epicatechin, ferulic acid, daidzin, genistin, and resveratrol first rose and then declined, and the content of ferulic acid was highest after 2 days of artificial aging, with the other five phenolic compounds showing the highest content after 4 days of artificial aging. The total content of the 19 phenolic compounds reached a peak of 2357.43 μg g-1 dry weight at 2 days. Relative expression of PAL1, PAL2, PAL3, CHS7, CHS8, IFS1, IFS2, CHR1, 4CL2, C4H, and CHI2 was mostly downregulated as the duration of artificial aging increased. This study provides novel insights into the storage and use of soybean seed resources. Graphical abstract.
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Affiliation(s)
- Meng Cui
- College of Life Sciences, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Dong Wu
- College of Life Sciences, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Kaixuan Bao
- College of Life Sciences, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Zenglian Wen
- College of Life Sciences, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Yingbin Hao
- College of Life Sciences, Nanchang University, Nanchang, 330031, Jiangxi, China.
| | - Liping Luo
- College of Life Sciences, Nanchang University, Nanchang, 330031, Jiangxi, China.
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330031, Jiangxi, China.
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Lenk I, Fisher LHC, Vickers M, Akinyemi A, Didion T, Swain M, Jensen CS, Mur LAJ, Bosch M. Transcriptional and Metabolomic Analyses Indicate that Cell Wall Properties are Associated with Drought Tolerance in Brachypodium distachyon. Int J Mol Sci 2019; 20:E1758. [PMID: 30974727 PMCID: PMC6479473 DOI: 10.3390/ijms20071758] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/03/2019] [Accepted: 04/08/2019] [Indexed: 01/07/2023] Open
Abstract
Brachypodium distachyon is an established model for drought tolerance. We previously identified accessions exhibiting high tolerance, susceptibility and intermediate tolerance to drought; respectively, ABR8, KOZ1 and ABR4. Transcriptomics and metabolomic approaches were used to define tolerance mechanisms. Transcriptional analyses suggested relatively few drought responsive genes in ABR8 compared to KOZ1. Linking these to gene ontology (GO) terms indicated enrichment for "regulated stress response", "plant cell wall" and "oxidative stress" associated genes. Further, tolerance correlated with pre-existing differences in cell wall-associated gene expression including glycoside hydrolases, pectin methylesterases, expansins and a pectin acetylesterase. Metabolomic assessments of the same samples also indicated few significant changes in ABR8 with drought. Instead, pre-existing differences in the cell wall-associated metabolites correlated with drought tolerance. Although other features, e.g., jasmonate signaling were suggested in our study, cell wall-focused events appeared to be predominant. Our data suggests two different modes through which the cell wall could confer drought tolerance: (i) An active response mode linked to stress induced changes in cell wall features, and (ii) an intrinsic mode where innate differences in cell wall composition and architecture are important. Both modes seem to contribute to ABR8 drought tolerance. Identification of the exact mechanisms through which the cell wall confers drought tolerance will be important in order to inform development of drought tolerant crops.
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Affiliation(s)
- Ingo Lenk
- DLF Seeds A/S, Højerupvej 31, 4660 Store Heddinge, Denmark.
| | - Lorraine H C Fisher
- Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Aberystwyth SY23 3EE, UK.
| | - Martin Vickers
- Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Aberystwyth SY23 3EE, UK.
| | - Aderemi Akinyemi
- Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Aberystwyth SY23 3EE, UK.
| | - Thomas Didion
- DLF Seeds A/S, Højerupvej 31, 4660 Store Heddinge, Denmark.
| | - Martin Swain
- Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Aberystwyth SY23 3EE, UK.
| | | | - Luis A J Mur
- Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Aberystwyth SY23 3EE, UK.
| | - Maurice Bosch
- Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Aberystwyth SY23 3EE, UK.
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Lignin engineering to improve saccharification and digestibility in grasses. Curr Opin Biotechnol 2019; 56:223-229. [DOI: 10.1016/j.copbio.2019.02.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 02/12/2019] [Accepted: 02/13/2019] [Indexed: 11/19/2022]
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Mutuku JM, Cui S, Hori C, Takeda Y, Tobimatsu Y, Nakabayashi R, Mori T, Saito K, Demura T, Umezawa T, Yoshida S, Shirasu K. The Structural Integrity of Lignin Is Crucial for Resistance against Striga hermonthica Parasitism in Rice. PLANT PHYSIOLOGY 2019; 179:1796-1809. [PMID: 30670602 PMCID: PMC6446757 DOI: 10.1104/pp.18.01133] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 01/13/2019] [Indexed: 05/22/2023]
Abstract
Striga species are parasitic weeds that seriously constrain the productivity of food staples, including cereals and legumes, in Sub-Saharan Africa and Asia. In eastern and central Africa, Striga spp. infest as much as 40 million hectares of smallholder farmland causing total crop failure during severe infestation. As the molecular mechanisms underlying resistance are yet to be elucidated, we undertook a comparative metabolome study using the Striga-resistant rice (Oryza sativa) cultivar 'Nipponbare' and the susceptible cultivar 'Koshihikari'. We found that a number of metabolites accumulated preferentially in the Striga-resistant cultivar upon Striga hermonthica infection. Most apparent was increased deposition of lignin, a phenylpropanoid polymer mainly composed of p-hydroxyphenyl (H), guaiacyl (G), and syringyl (S) aromatic units, around the site of interaction in Nipponbare. The increased deposition of lignin was accompanied by induction of the expression of corresponding enzyme-encoding genes in the phenylpropanoid pathway. In addition, perturbing normal lignin composition by knocking down or overexpressing the genes that regulate lignin composition, i.e. p-COUMARATE 3-HYDROXYLASE or FERULATE 5-HYDROXYLASE, enhanced susceptibility of Nipponbare to S hermonthica infection. These results demonstrate that enhanced lignin deposition and maintenance of the structural integrity of lignin polymers deposited at the infection site are crucial for postattachment resistance against S hermonthica.
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Affiliation(s)
- J Musembi Mutuku
- Biosciences Eastern and Central Africa - International Livestock Research Institute (BecA-ILRI) Hub, 00100 Nairobi, Kenya
| | - Songkui Cui
- Institute for Research Initiatives, Division for Research Strategy, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
- Division of Biological Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
- RIKEN Center for Sustainable Resource Science, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | - Chiaki Hori
- Research Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Yuri Takeda
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Yuki Tobimatsu
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Ryo Nakabayashi
- RIKEN Center for Sustainable Resource Science, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | - Tetsuya Mori
- RIKEN Center for Sustainable Resource Science, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | - Kazuki Saito
- RIKEN Center for Sustainable Resource Science, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
- Graduate School of Pharmaceutical Sciences, Chiba University, Chuo-ku, Chiba 260-8675, Japan
| | - Taku Demura
- Division of Biological Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Toshiaki Umezawa
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto 611-0011, Japan
- Research Unit for Development and Global Sustainability, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Satoko Yoshida
- Institute for Research Initiatives, Division for Research Strategy, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
- Division of Biological Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
- RIKEN Center for Sustainable Resource Science, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | - Ken Shirasu
- RIKEN Center for Sustainable Resource Science, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
- Graduate School of Biological Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
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Chen X, Wu Q, Chen Z, Li T, Zhang Z, Gao H, Yun Z, Jiang Y. Changes in pericarp metabolite profiling of four litchi cultivars during browning. Food Res Int 2019; 120:339-351. [PMID: 31000248 DOI: 10.1016/j.foodres.2019.02.046] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 01/08/2019] [Accepted: 02/25/2019] [Indexed: 12/12/2022]
Abstract
The pericarp browning is an important physiological index during the postharvest storage, which seriously shortens the shelf-life of litchi fruit. In this study, the browning index of four litchi cultivars were compared, and the shelf-life, from longer to shorter, was 'Feizixiao (FXZ)', 'Jingganghongnuo (JGHN)', 'Huaizhi (HZ)' and 'Nuomici (NMC)', respectively. Then, comparative metabolomics were performed in the pericarp of four litchi cultivars during browning. Finding results showed that a total of 119 kinds of metabolites were detected in litchi pericarp, including 30 kinds of primary metabolites, 44 kinds of volatile compounds, 29 kinds of free amino acids and 16 kinds of hydrolytic amino acids. After ANOVA and OPLS-DA, 52 kinds of metabolites were important with predictive VIP > 1 and p < 0.05. In FZX pericarp, the contents of many amino acids increased significantly, which might be related to the yellow-green pericarp and play an important role in delaying browning. In the pericarp of JGHN, NMC and HZ, a great number of soluble sugars and some free amino acids were induced during browning, which was negatively correlated with the browning speed of three red pericarp cultivars. The browning induced a large number of sesquiterpenes in the pericarp of FZX, NMC and HZ, which was positively correlated with the browning index. In addition, the correlation analysis showed that the amino acids were negatively correlated with the volatile compounds, suggesting that pericarp browning could induce the conversion of metabolic products from amino acids to terpenes.
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Affiliation(s)
- Xi Chen
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No.723 Xingke Road, Tianhe District, Guangzhou 510650, China; University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing 100049, China.
| | - Qixian Wu
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No.723 Xingke Road, Tianhe District, Guangzhou 510650, China; University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing 100049, China.
| | - Zhongsuzhi Chen
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No.723 Xingke Road, Tianhe District, Guangzhou 510650, China; University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Taotao Li
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No.723 Xingke Road, Tianhe District, Guangzhou 510650, China.
| | - Zhengke Zhang
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No.723 Xingke Road, Tianhe District, Guangzhou 510650, China; College of Food Science and Technology, Hainan University, No.58 Haidiandao Renmin Street, Haikou 570228, China
| | - Huijun Gao
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, No. 80 Dafeng Two Street, Tianhe District, Guangzhou 510640, China.
| | - Ze Yun
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No.723 Xingke Road, Tianhe District, Guangzhou 510650, China.
| | - Yueming Jiang
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, No.723 Xingke Road, Tianhe District, Guangzhou 510650, China.
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Tang Y, Zhao D, Meng J, Tao J. EGTA reduces the inflorescence stem mechanical strength of herbaceous peony by modifying secondary wall biosynthesis. HORTICULTURE RESEARCH 2019; 6:36. [PMID: 30854212 PMCID: PMC6395589 DOI: 10.1038/s41438-019-0117-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 12/19/2018] [Accepted: 12/30/2018] [Indexed: 05/12/2023]
Abstract
The mechanical strength of inflorescence stems is an important trait in cut flowers. Calcium ions (Ca2+) play a pivotal role in maintaining stem strength, but little is known about the underlying molecular mechanisms. In this study, we treated herbaceous peony (Paeonia lactiflora Pall.) with ethyl glycol tetraacetic acid (EGTA), an effective Ca2+ chelator, and used morphology indicators, spectroscopic analysis, histochemical staining, electron microscopy, and proteomic techniques to investigate the role of Ca2+ in inflorescence stem mechanical strength. The EGTA treatment reduced the mechanical strength of inflorescence stems, triggered the loss of Ca2+ from cell walls, and reduced lignin in thickened secondary walls in xylem cells as determined by spectroscopic analysis and histochemical staining. Electron microscopy showed that the EGTA treatment also resulted in significantly fewer xylem cell layers with thickened secondary walls as well as in reducing the thickness of these secondary walls. The proteomic analysis showed 1065 differentially expressed proteins (DEPs) at the full-flowering stage (S4). By overlapping the Kyoto encyclopedia of genes and genomes (KEGG) and gene ontology (GO) analysis results, we identified 43 DEPs involved in signal transduction, transport, energy metabolism, carbohydrate metabolism, and secondary metabolite biosynthesis. Using quantitative real-time polymerase chain reaction (qRT-PCR) analysis, we showed that EGTA treatment inhibited Ca2+ sensors and secondary wall biosynthesis-related genes. Our findings revealed that EGTA treatment reduced the inflorescence stem mechanical strength by reducing lignin deposition in xylem cells through altering the expression of genes involved in Ca2+ binding and secondary wall biosynthesis.
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Affiliation(s)
- Yuhan Tang
- Jiangsu Key Laboratory of Crop Genetics and Physiology, College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009 Jiangsu China
| | - Daqiu Zhao
- Jiangsu Key Laboratory of Crop Genetics and Physiology, College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009 Jiangsu China
| | - Jiasong Meng
- Jiangsu Key Laboratory of Crop Genetics and Physiology, College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009 Jiangsu China
| | - Jun Tao
- Jiangsu Key Laboratory of Crop Genetics and Physiology, College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009 Jiangsu China
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Garcia C, Rodrigues JD, Mazaro SM, Botelho RV, Faria CMDR. Óleos essenciais no controle de Botrytis cinerea: influência na qualidade pós-colheita de uvas ‘Rubi’. BRAZILIAN JOURNAL OF FOOD TECHNOLOGY 2019. [DOI: 10.1590/1981-6723.17718] [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
Resumo Para que ocorra o controle de doenças na pós-colheita de uvas, são utilizados agroquímicos que, apesar de eficientes, podem causar problemas à saúde humana. Neste sentido, o presente trabalho tem o objetivo de verificar o potencial dos compostos voláteis presentes no óleo essencial de pitanga (OEP), guaçatonga (OEG) e melaleuca (OEM) no controle de Botrytis cinerea tanto in vitro quanto inoculados nas bagas de uvas ‘Rubi’, bem como verificar a indução de resistência nesses frutos. Dessa forma, avaliou-se o crescimento micelial do B. cinerea, o controle do mofo cinzento nas uvas ‘Rubi’, a qualidade pós-colheita dessas bagas e a atividade das enzimas polifenoloxidase (PPO), fenilalanina amônio liase (PAL), glucanase (GLU) e quitinase. De acordo com os resultados, observou-se que os compostos voláteis liberados pelos óleos essenciais reduziram os índices de velocidade de crescimento micelial de B. cinerea e da doença do mofo cinzento. Os tratamentos com voláteis de OEP e OEG ativaram mecanismos de indução de resistência desses frutos. Dessa forma, ressalta-se que OEP e OEG liberam compostos que apresentam a capacidade de agir diretamente sobre B. cinerea e também induzem a resistência de uvas ‘Rubi’, reduzindo o mofo cinzento nessas uvas.
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79
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Cheng D, Tan M, Yu H, Li L, Zhu D, Chen Y, Jiang M. Comparative analysis of Cd-responsive maize and rice transcriptomes highlights Cd co-modulated orthologs. BMC Genomics 2018; 19:709. [PMID: 30257650 PMCID: PMC6158873 DOI: 10.1186/s12864-018-5109-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Accepted: 09/21/2018] [Indexed: 11/29/2022] Open
Abstract
Background Metal tolerance is often an integrative result of metal uptake and distribution, which are fine-tuned by a network of signaling cascades and metal transporters. Thus, with the goal of advancing the molecular understanding of such metal homeostatic mechanisms, comparative RNAseq-based transcriptome analysis was conducted to dissect differentially expressed genes (DEGs) in maize roots exposed to cadmium (Cd) stress. Results To unveil conserved Cd-responsive genes in cereal plants, the obtained 5166 maize DEGs were compared with 2567 Cd-regulated orthologs in rice roots, and this comparison generated 880 universal Cd-responsive orthologs groups composed of 1074 maize DEGs and 981 rice counterparts. More importantly, most of the orthologous DEGs showed coordinated expression pattern between Cd-treated maize and rice, and these include one large orthologs group of pleiotropic drug resistance (PDR)-type ABC transporters, two clusters of amino acid transporters, and 3 blocks of multidrug and toxic compound extrusion (MATE) efflux family transporters, and 3 clusters of heavy metal-associated domain (HMAD) isoprenylated plant proteins (HIPPs), as well as all 4 groups of zinc/iron regulated transporter protein (ZIPs). Additionally, several blocks of tandem maize paralogs, such as germin-like proteins (GLPs), phenylalanine ammonia-lyases (PALs) and several enzymes involved in JA biosynthesis, displayed consistent co-expression pattern under Cd stress. Out of the 1074 maize DEGs, approximately 30 maize Cd-responsive genes such as ZmHIPP27, stress-responsive NAC transcription factor (ZmSNAC1) and 9-cis-epoxycarotenoid dioxygenase (NCED, vp14) were also common stress-responsive genes reported to be uniformly regulated by multiple abiotic stresses. Moreover, the aforementioned three promising Cd-upregulated genes with rice counterparts were identified to be novel Cd-responsive genes in maize. Meanwhile, one maize glutamate decarboxylase (ZmGAD1) with Cd co-modulated rice ortholog was selected for further analysis of Cd tolerance via heterologous expression, and the results suggest that ZmGAD1 can confer Cd tolerance in yeast and tobacco leaves. Conclusions These novel findings revealed the conserved function of Cd-responsive orthologs and paralogs, which would be valuable for elucidating the genetic basis of the plant response to Cd stress and unraveling Cd tolerance genes. Electronic supplementary material The online version of this article (10.1186/s12864-018-5109-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Dan Cheng
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Mingpu Tan
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China.
| | - Haijuan Yu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Liang Li
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Dandan Zhu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Yahua Chen
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Mingyi Jiang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
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80
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Shi Y, Liu X, Fang Y, Tian Q, Jiang H, Ma H. 2, 3-Butanediol activated disease-resistance of creeping bentgrass by inducing phytohormone and antioxidant responses. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 129:244-250. [PMID: 29906774 DOI: 10.1016/j.plaphy.2018.06.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 06/03/2018] [Accepted: 06/08/2018] [Indexed: 05/16/2023]
Abstract
Brown patch, caused by Rhizoctonia solani, is a serious disease in Agrostis stolonifera. 2, 3-butanediol (2, 3-BD) is the major component of volatile organic compounds and was found to initiate induced systemic resistance (ISR). To investigate the induced resistance mechanism of 2, 3-BD, we examined the effects of resistance by area affected, along with changes in the content of phytohormones (Zeatin (ZT), Abscisic Acid (ABA) and Indole-3-Acetic Acid (IAA)), the activities of three phenylpropanoid metabolic enzymes (Phenylalaninammo-Nialyase (PAL), Chalcone Isomerase (CHI) and 4-Coumarate:Coenzyme A Ligase (4CL)) and the level of secondary metabolites (total phenols, flavonoid and lignin). The result showed that 2, 3-BD treatment at 250 μmoL/L had the best induction effect with the area affected decreased from 95% of the control to 55%. Compared to the controls, treatment with 250 μmoL/L 2, 3-BD induced higher levels of PAL, CHI and 4CL activity and increased total phenols, flavonoid and lignin levels. While 2, 3-BD treatment decreased the content of ZT and ABA but increased the content of IAA compared to controls. This study provides a basis for elucidating the mechanism of 2, 3-BD as a new plant disease control agent.
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Affiliation(s)
- Yi Shi
- College of Grassland Science, Gansu Agricultural University, Lanzhou, Gansu, 730070, PR China; Key Laboratory of Grassland Ecosystems, The Ministry of Education of China, Lanzhou, 730070, China; College of Forestry, Gansu Agricultural University, Lanzhou, Gansu, 730070, PR China
| | - Xinju Liu
- College of Grassland Science, Gansu Agricultural University, Lanzhou, Gansu, 730070, PR China; Key Laboratory of Grassland Ecosystems, The Ministry of Education of China, Lanzhou, 730070, China
| | - Yuanyuan Fang
- College of Grassland Science, Gansu Agricultural University, Lanzhou, Gansu, 730070, PR China; Key Laboratory of Grassland Ecosystems, The Ministry of Education of China, Lanzhou, 730070, China
| | - Qing Tian
- College of Forestry, Gansu Agricultural University, Lanzhou, Gansu, 730070, PR China
| | - Hanyu Jiang
- College of Grassland Science, Gansu Agricultural University, Lanzhou, Gansu, 730070, PR China; Key Laboratory of Grassland Ecosystems, The Ministry of Education of China, Lanzhou, 730070, China; College of Life Science and Technology, Gansu Agricultural University, Lanzhou, Gansu, 730070, PR China
| | - Huiling Ma
- College of Grassland Science, Gansu Agricultural University, Lanzhou, Gansu, 730070, PR China; Key Laboratory of Grassland Ecosystems, The Ministry of Education of China, Lanzhou, 730070, China.
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Schenck CA, Maeda HA. Tyrosine biosynthesis, metabolism, and catabolism in plants. PHYTOCHEMISTRY 2018; 149:82-102. [PMID: 29477627 DOI: 10.1016/j.phytochem.2018.02.003] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 01/26/2018] [Accepted: 02/02/2018] [Indexed: 05/22/2023]
Abstract
L-Tyrosine (Tyr) is an aromatic amino acid (AAA) required for protein synthesis in all organisms, but synthesized de novo only in plants and microorganisms. In plants, Tyr also serves as a precursor of numerous specialized metabolites that have diverse physiological roles as electron carriers, antioxidants, attractants, and defense compounds. Some of these Tyr-derived plant natural products are also used in human medicine and nutrition (e.g. morphine and vitamin E). While the Tyr biosynthesis and catabolic pathways have been extensively studied in microbes and animals, respectively, those of plants have received much less attention until recently. Accumulating evidence suggest that the Tyr biosynthetic pathways differ between microbes and plants and even within the plant kingdom, likely to support the production of lineage-specific plant specialized metabolites derived from Tyr. The interspecies variations of plant Tyr pathway enzymes can now be used to enhance the production of Tyr and Tyr-derived compounds in plants and other synthetic biology platforms.
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Affiliation(s)
- Craig A Schenck
- Department of Botany, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Hiroshi A Maeda
- Department of Botany, University of Wisconsin-Madison, Madison, WI 53706, USA.
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Wound Stress, an Unheeded Factor for Echinacoside Accumulation in Cistanche deserticola Y. C. Ma. Molecules 2018; 23:molecules23040893. [PMID: 29649140 PMCID: PMC6017391 DOI: 10.3390/molecules23040893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 03/31/2018] [Accepted: 04/09/2018] [Indexed: 11/17/2022] Open
Abstract
Cistanche deserticola Y. C. Ma, a precious parasitic medicinal herb distributed in desert areas in the Northwest of China, also known as "desert ginseng", has been used in China for thousands of years for its nourishing effects. The phenylethanoid glycosides (PeGs) have been proven as the main effective compounds due to their neuroprotective effects and were used for quality control. In this study, echinacoside content, a representative PeG, total phenolic content, DPPH scavenging activity, and PAL activity were determined in different tissues of C. deserticola. Our results showed that most indices had a similar pattern of scale > cambium ring > pith and bottom part > middle part > upper part. Besides, stereomicroscopic observation showed that the scale surface was densely covered with physical wounds formed during vertical and broadwise growth in sand. Thus, wound area was quantified and a linear regression analysis was conducted between wound area and PAL activity, total phenolics, and echinacoside content. Our results suggested that physical wounding caused by sand might play an important role in echinacoside biosynthesis which has never been noticed in C. deserticola development. Furthermore, the coexistence of the highest PAL activity and highest echinacoside accumulation in scale tissue might indicate that the biosynthetic site of echinacoside in C. deseticola Y. C. Ma is mainly in the scale tissue.
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Bido GDS, da Silva HA, Bortolo TDSC, Maldonado MR, Marchiosi R, dos Santos WD, Ferrarese-Filho O. Comparative effects of L-DOPA and velvet bean seed extract on soybean lignification. PLANT SIGNALING & BEHAVIOR 2018; 13:e1451705. [PMID: 29537908 PMCID: PMC5933913 DOI: 10.1080/15592324.2018.1451705] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/01/2018] [Indexed: 06/17/2023]
Abstract
Velvet bean (Mucuna pruriens) is an efficient cover forage that controls weeds, pathogens and nematodes, and the non-protein amino acid L-3,4-dihydroxyphenylalanine (L-DOPA) is its main allelochemical. The effects of 3 g L-1 of an aqueous extract of velvet bean seeds, along with 0.5 mM L-DOPA for comparison, were evaluated in roots, stems and leaves of soybean (Glycine max). The activities of phenylalanine ammonia lyase (PAL) and cinnamyl alcohol dehydrogenase (CAD) were determined, along with the lignin content and its monomeric composition. The results revealed similar effects caused by L-DOPA and the aqueous extract. Both treatments reduced PAL and CAD activities, lignin, and lignin monomer contents in roots; PAL and CAD activities in stems, and CAD activity in leaves. These findings provide further evidence that the effects of velvet bean cover forage on root lignification were due to the L-DOPA, its major allelochemical.
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Affiliation(s)
- Graciene de Souza Bido
- Laboratory of Plant Biochemistry, Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | - Hingrid Ariane da Silva
- Laboratory of Plant Biochemistry, Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | | | - Marcos Rodrigues Maldonado
- Laboratory of Plant Biochemistry, Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | - Rogério Marchiosi
- Laboratory of Plant Biochemistry, Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | - Wanderley Dantas dos Santos
- Laboratory of Plant Biochemistry, Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | - Osvaldo Ferrarese-Filho
- Laboratory of Plant Biochemistry, Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
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84
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Yusuf CYL, Abdullah JO, Shaharuddin NA, Abu Seman I, Abdullah MP. Characterization of promoter of EgPAL1, a novel PAL gene from the oil palm Elaeis guineensis Jacq. PLANT CELL REPORTS 2018; 37:265-278. [PMID: 29090330 DOI: 10.1007/s00299-017-2228-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 10/18/2017] [Indexed: 06/07/2023]
Abstract
The oil palm EgPAL1 gene promoter and its regulatory region were functional as a promoter in the heterologous system of Arabidopsis according to the cis-acting elements present in that region. The promoter was developmentally regulated, vascular tissue specific and responsive to water stress agents. Phenylalanine ammonia lyase (PAL, EC 4.3.1.24) is the key enzyme of the phenylpropanoid pathway which plays important roles in plant development and adaptation. To date, there is no report on the study of PAL from oil palm (Elaeis guineensis), an economically important oil crop. In this study, the 5' regulatory sequence of a highly divergent oil palm PAL gene (EgPAL1) was isolated and fused with GUS in Arabidopsis to create two transgenic plants carrying the minimal promoter with (2302 bp) and without its regulatory elements (139 bp). The regulatory sequence contained cis-acting elements known to be important for plant development and stress response including the AC-II element for lignin biosynthesis and several stress responsive elements. The promoter and its regulatory region were fully functional in Arabidopsis. Its activities were characterised by two common fundamental features of PAL which are responsive to plant internal developmental programme and external factors. The promoter was developmentally regulated in certain organs; highly active in young organs but less active or inactive in mature organs. The presence of the AC elements and global activity of the EgPAL1 promoter in all organs resembled the property of lignin-related genes. The existence of the MBS element and enhancement of the promoter activity by PEG reflected the behaviour of drought-responsive genes. Our findings provide a platform for evaluating oil palm gene promoters in the heterologous system of Arabidopsis and give insights into the activities of EgPAL1 promoter in oil palm.
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Affiliation(s)
- Chong Yu Lok Yusuf
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
- Faculty of Plantation and Agrotechnology, Universiti Teknologi MARA, Kampus Jasin, 77300, Merlimau, Melaka, Malaysia
| | - Janna Ong Abdullah
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Noor Azmi Shaharuddin
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
- Institute of Plantation Studies, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Idris Abu Seman
- Malaysian Palm Oil Board (MPOB), No. 6, Persiaran Institusi, Bandar Baru Bangi, 43000, Kajang, Selangor, Malaysia
| | - Mohd Puad Abdullah
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
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85
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Jun SY, Sattler SA, Cortez GS, Vermerris W, Sattler SE, Kang C. Biochemical and Structural Analysis of Substrate Specificity of a Phenylalanine Ammonia-Lyase. PLANT PHYSIOLOGY 2018; 176:1452-1468. [PMID: 29196539 PMCID: PMC5813539 DOI: 10.1104/pp.17.01608] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 11/28/2017] [Indexed: 05/18/2023]
Abstract
Phenylalanine ammonia-lyase (PAL) is the first enzyme of the general phenylpropanoid pathway catalyzing the nonoxidative elimination of ammonia from l-phenylalanine to give trans-cinnamate. In monocots, PAL also displays tyrosine ammonia lyase (TAL) activity, leading to the formation of p-coumaric acid. The catalytic mechanism and substrate specificity of a major PAL from sorghum (Sorghum bicolor; SbPAL1), a strategic plant for bioenergy production, were deduced from crystal structures, molecular docking, site-directed mutagenesis, and kinetic and thermodynamic analyses. This first crystal structure of a monocotyledonous PAL displayed a unique conformation in its flexible inner loop of the 4-methylidene-imidazole-5-one (MIO) domain compared with that of dicotyledonous plants. The side chain of histidine-123 in the MIO domain dictated the distance between the catalytic MIO prosthetic group created from 189Ala-Ser-Gly191 residues and the bound l-phenylalanine and l-tyrosine, conferring the deamination reaction through either the Friedel-Crafts or E2 reaction mechanism. Several recombinant mutant SbPAL1 enzymes were generated via structure-guided mutagenesis, one of which, H123F-SbPAL1, has 6.2 times greater PAL activity without significant TAL activity. Additional PAL isozymes of sorghum were characterized and categorized into three groups. Taken together, this approach identified critical residues and explained substrate preferences among PAL isozymes in sorghum and other monocots, which can serve as the basis for the engineering of plants with enhanced biomass conversion properties, disease resistance, or nutritional quality.
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Affiliation(s)
- Se-Young Jun
- Department of Chemistry, Washington State University, Pullman, Washington 99164
| | - Steven A Sattler
- School of Molecular Biosciences, Washington State University, Pullman, Washington 99163
| | - Gabriel S Cortez
- Department of Chemistry, Washington State University, Pullman, Washington 99164
| | - Wilfred Vermerris
- Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, and Genetics Institute, University of Florida, Gainesville, Florida 32610
| | - Scott E Sattler
- United States Department of Agriculture-Agricultural Research Service, Wheat, Sorghum, and Forage Research Unit, and Department of Agronomy and Horticulture, University of Nebraska, Lincoln, Nebraska 68583
| | - ChulHee Kang
- Department of Chemistry, Washington State University, Pullman, Washington 99164
- School of Molecular Biosciences, Washington State University, Pullman, Washington 99163
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86
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Yan J, Aznar A, Chalvin C, Birdseye DS, Baidoo EEK, Eudes A, Shih PM, Loqué D, Zhang A, Scheller HV. Increased drought tolerance in plants engineered for low lignin and low xylan content. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:195. [PMID: 30026810 PMCID: PMC6050699 DOI: 10.1186/s13068-018-1196-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Accepted: 07/06/2018] [Indexed: 05/08/2023]
Abstract
BACKGROUND We previously developed several strategies to engineer plants to produce cost-efficient biofuels from plant biomass. Engineered Arabidopsis plants with low xylan and lignin content showed normal growth and improved saccharification efficiency under standard growth conditions. However, it remains to be determined whether these engineered plants perform well under drought stress, which is the primary source of abiotic stress in the field. RESULTS Upon exposing engineered Arabidopsis plants to severe drought, we observed better survival rates in those with a low degree of xylan acetylation, low lignin, and low xylan content compared to those in wild-type plants. Increased pectic galactan content had no effect on drought tolerance. The drought-tolerant plants exhibited low water loss from leaves, and drought-responsive genes (RD29A, RD29B, DREB2A) were generally up-regulated under drought stress, which did not occur in the well-watered state. When compared with the wild type, plants with low lignin due to expression of QsuB, a 3-dehydroshikimate dehydratase, showed a stronger response to abscisic acid (ABA) in assays for seed germination and stomatal closure. The low-lignin plants also accumulated more ABA in response to drought than the wild-type plants. On the contrary, the drought tolerance in the engineered plants with low xylan content and low xylan acetylation was not associated with differences in ABA content or response compared to the wild type. Surprisingly, we found a significant increase in galactose levels and sugar released from the low xylan-engineered plants under drought stress. CONCLUSIONS This study shows that plants engineered to accumulate less lignin or xylan are more tolerant to drought and activate drought responses faster than control plants. This is an important finding because it demonstrates that modification of secondary cell walls does not necessarily render the plants less robust in the environment, and it shows that substantial changes in biomass composition can be achieved without compromising plant resilience.
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Affiliation(s)
- Jingwei Yan
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095 Jiangsu China
| | - Aude Aznar
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - Camille Chalvin
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
- Ecole Normale Supérieure de Cachan, 94230 Cachan, France
| | - Devon S. Birdseye
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - Edward E. K. Baidoo
- Joint BioEnergy Institute and Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - Aymerick Eudes
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - Patrick M. Shih
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - Dominique Loqué
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA 94720 USA
| | - Aying Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095 Jiangsu China
| | - Henrik V. Scheller
- Joint BioEnergy Institute and Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA 94720 USA
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87
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Zhou R, Zhu Y, Zhao J, Fang Z, Wang S, Yin J, Chu Z, Ma D. Transcriptome-Wide Identification and Characterization of Potato Circular RNAs in Response to Pectobacterium carotovorum Subspecies brasiliense Infection. Int J Mol Sci 2017; 19:E71. [PMID: 29280973 PMCID: PMC5796021 DOI: 10.3390/ijms19010071] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Revised: 12/05/2017] [Accepted: 12/13/2017] [Indexed: 12/31/2022] Open
Abstract
Little information about the roles of circular RNAs (circRNAs) during potato-Pectobacterium carotovorum subsp. brasiliense (Pcb) interaction is currently available. In this study, we conducted the systematic identification of circRNAs from time series samples of potato cultivars Valor (susceptible) and BP1 (disease tolerant) infected by Pcb. A total of 2098 circRNAs were detected and about half (931, 44.38%) were intergenic circRNAs. And differential expression analysis detected 429 significantly regulated circRNAs. circRNAs play roles by regulating parental genes and sponging miRNAs. Gene Ontology (GO) enrichment of parental genes and miRNAs targeted mRNAs revealed that these differentially expressed (DE) circRNAs were involved in defense response (GO:0006952), cell wall (GO:0005199), ADP binding (GO:0043531), phosphorylation (GO:0016310), and kinase activity (GO:0016301), suggesting the roles of circRNAs in regulating potato immune response. Furthermore, weighted gene co-expression network analysis (WGCNA) found that circRNAs were closely related with coding-genes and long intergenic noncoding RNAs (lincRNAs). And together they were cultivar-specifically regulated to strengthen immune response of potato to Pcb infection, implying the roles of circRNAs in reprogramming disease responsive transcriptome. Our results will provide new insights into the potato-Pcb interaction and may lead to novel disease control strategy in the future.
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Affiliation(s)
- Ran Zhou
- College of Agriculture/College of Horticulture and Gardening/Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou 434025, China.
- College of Agronomy, Shandong Agricultural University, Tai'an 271018, China.
- College of Plant Protection, Northwest A&F University, Yangling 712100, China.
| | - Yongxing Zhu
- College of Agriculture/College of Horticulture and Gardening/Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou 434025, China.
| | - Jiao Zhao
- College of Agriculture/College of Horticulture and Gardening/Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou 434025, China.
| | - Zhengwu Fang
- College of Agriculture/College of Horticulture and Gardening/Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou 434025, China.
| | - Shuping Wang
- College of Agriculture/College of Horticulture and Gardening/Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou 434025, China.
| | - Junliang Yin
- College of Agriculture/College of Horticulture and Gardening/Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou 434025, China.
- College of Agronomy, Shandong Agricultural University, Tai'an 271018, China.
| | - Zhaohui Chu
- College of Agronomy, Shandong Agricultural University, Tai'an 271018, China.
| | - Dongfang Ma
- College of Agriculture/College of Horticulture and Gardening/Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou 434025, China.
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88
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Powell JJ, Carere J, Sablok G, Fitzgerald TL, Stiller J, Colgrave ML, Gardiner DM, Manners JM, Vogel JP, Henry RJ, Kazan K. Transcriptome analysis of Brachypodium during fungal pathogen infection reveals both shared and distinct defense responses with wheat. Sci Rep 2017; 7:17212. [PMID: 29222453 PMCID: PMC5722949 DOI: 10.1038/s41598-017-17454-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 11/26/2017] [Indexed: 11/09/2022] Open
Abstract
Fusarium crown rot (FCR) of wheat and barley, predominantly caused by the fungal pathogen Fusarium pseudograminearum, is a disease of economic significance. The quantitative nature of FCR resistance within cultivated wheat germplasm has significantly limited breeding efforts to enhanced FCR resistance in wheat. In this study, we characterized the molecular responses of Brachypodium distachyon (Brachypodium hereafter) to F. pseudograminearum infection using RNA-seq to determine whether Brachypodium can be exploited as a model system towards better understanding of F. pseudograminearum-wheat interaction. The transcriptional response to infection in Brachypodium was strikingly similar to that previously reported in wheat, both in shared expression patterns of wheat homologs of Brachypodium genes and functional overlap revealed through comparative gene ontology analysis in both species. Metabolites produced by various biosynthetic pathways induced in both wheat and Brachypodium were quantified, revealing a high degree of overlap between these two species in metabolic response to infection but also showed Brachypodium does not produce certain defence-related metabolites found in wheat. Functional analyses of candidate genes identified in this study will improve our understanding of resistance mechanisms and may lead to the development of new strategies to protect cereal crops from pathogen infection.
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Affiliation(s)
- Jonathan J Powell
- Commonwealth Scientific and Industrial Research Organization Agriculture and Food, St Lucia, Queensland, 4067, Australia.
- Queensland Alliance for Agriculture and Food Innovation (QAAFI), University of Queensland, St Lucia, 4067, Queensland, Australia.
| | - Jason Carere
- Commonwealth Scientific and Industrial Research Organization Agriculture and Food, St Lucia, Queensland, 4067, Australia
| | - Gaurav Sablok
- Plant Functional Biology and Climate Change Cluster (C3), University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Sydney, Australia
| | - Timothy L Fitzgerald
- Commonwealth Scientific and Industrial Research Organization Agriculture and Food, St Lucia, Queensland, 4067, Australia
| | - Jiri Stiller
- Commonwealth Scientific and Industrial Research Organization Agriculture and Food, St Lucia, Queensland, 4067, Australia
| | - Michelle L Colgrave
- Commonwealth Scientific and Industrial Research Organization Agriculture and Food, St Lucia, Queensland, 4067, Australia
| | - Donald M Gardiner
- Commonwealth Scientific and Industrial Research Organization Agriculture and Food, St Lucia, Queensland, 4067, Australia
| | - John M Manners
- Commonwealth Scientific and Industrial Research Organization Agriculture and Food, Black Mountain, Australian Capital Territory, 2601, Australia
| | - John P Vogel
- Joint Genome Institute, United States Department of Energy, Walnut Creek, CA, 94598, USA
| | - Robert J Henry
- Queensland Alliance for Agriculture and Food Innovation (QAAFI), University of Queensland, St Lucia, 4067, Queensland, Australia
| | - Kemal Kazan
- Commonwealth Scientific and Industrial Research Organization Agriculture and Food, St Lucia, Queensland, 4067, Australia.
- Queensland Alliance for Agriculture and Food Innovation (QAAFI), University of Queensland, St Lucia, 4067, Queensland, Australia.
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89
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Bewg WP, Coleman HD. Cell wall composition and lignin biosynthetic gene expression along a developmental gradient in an Australian sugarcane cultivar. PeerJ 2017; 5:e4141. [PMID: 29230370 PMCID: PMC5721908 DOI: 10.7717/peerj.4141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 11/15/2017] [Indexed: 01/13/2023] Open
Abstract
Sugarcane bagasse is an abundant source of lignocellulosic material for bioethanol production. Utilisation of bagasse for biofuel production would be environmentally and economically beneficial, but the recalcitrance of lignin continues to provide a challenge. Further understanding of lignin production in specific cultivars will provide a basis for modification of genomes for the production of phenotypes with improved processing characteristics. Here we evaluated the expression profile of lignin biosynthetic genes and the cell wall composition along a developmental gradient in KQ228 sugarcane. The expression levels of nine lignin biosynthesis genes were quantified in five stem sections of increasing maturity and in root tissue. Two distinct expression patterns were seen. The first saw highest gene expression in the youngest tissue, with expression decreasing as tissue matured. The second pattern saw little to no change in transcription levels across the developmental gradient. Cell wall compositional analysis of the stem sections showed total lignin content to be significantly higher in more mature tissue than in the youngest section assessed. There were no changes in structural carbohydrates across developmental sections. These gene expression and cell wall compositional patterns can be used, along with other work in grasses, to inform biotechnological approaches to crop improvement for lignocellulosic biofuel production.
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Affiliation(s)
- William P Bewg
- Centre for Tropical Crops and Biocommodities, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Heather D Coleman
- Department of Biology, Syracuse University, Syracuse, NY, United States of America
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90
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Lynch JH, Orlova I, Zhao C, Guo L, Jaini R, Maeda H, Akhtar T, Cruz-Lebron J, Rhodes D, Morgan J, Pilot G, Pichersky E, Dudareva N. Multifaceted plant responses to circumvent Phe hyperaccumulation by downregulation of flux through the shikimate pathway and by vacuolar Phe sequestration. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2017; 92:939-950. [PMID: 28977710 DOI: 10.1111/tpj.13730] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 07/10/2017] [Accepted: 09/28/2017] [Indexed: 06/07/2023]
Abstract
Detrimental effects of hyperaccumulation of the aromatic amino acid phenylalanine (Phe) in animals, known as phenylketonuria, are mitigated by excretion of Phe derivatives; however, how plants endure Phe accumulating conditions in the absence of an excretion system is currently unknown. To achieve Phe hyperaccumulation in a plant system, we simultaneously decreased in petunia flowers expression of all three Phe ammonia lyase (PAL) isoforms that catalyze the non-oxidative deamination of Phe to trans-cinnamic acid, the committed step for the major pathway of Phe metabolism. A total decrease in PAL activity by 81-94% led to an 18-fold expansion of the internal Phe pool. Phe accumulation had multifaceted intercompartmental effects on aromatic amino acid metabolism. It resulted in a decrease in the overall flux through the shikimate pathway, and a redirection of carbon flux toward the shikimate-derived aromatic amino acids tyrosine and tryptophan. Accumulation of Phe did not lead to an increase in flux toward phenylacetaldehyde, for which Phe is a direct precursor. Metabolic flux analysis revealed this to be due to the presence of a distinct metabolically inactive pool of Phe, likely localized in the vacuole. We have identified a vacuolar cationic amino acid transporter (PhCAT2) that contributes to sequestering excess of Phe in the vacuole. In vitro assays confirmed PhCAT2 can transport Phe, and decreased PhCAT2 expression in PAL-RNAi transgenic plants resulted in 1.6-fold increase in phenylacetaldehyde emission. These results demonstrate mechanisms by which plants maintain intercompartmental aromatic amino acid homeostasis, and provide critical insight for future phenylpropanoid metabolic engineering strategies.
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Affiliation(s)
- Joseph H Lynch
- Department of Biochemistry, Purdue University, West Lafayette, IN, 47907, USA
| | - Irina Orlova
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, 47907, USA
| | - Chengsong Zhao
- Department of Plant Pathology, Physiology, and Weed Science, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Longyun Guo
- Department of Biochemistry, Purdue University, West Lafayette, IN, 47907, USA
| | - Rohit Jaini
- School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Hiroshi Maeda
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, 47907, USA
| | - Tariq Akhtar
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, 48109, USA
| | | | - David Rhodes
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, 47907, USA
| | - John Morgan
- Department of Biochemistry, Purdue University, West Lafayette, IN, 47907, USA
- School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Guillaume Pilot
- Department of Plant Pathology, Physiology, and Weed Science, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Eran Pichersky
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Natalia Dudareva
- Department of Biochemistry, Purdue University, West Lafayette, IN, 47907, USA
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, 47907, USA
- Purdue Center for Plant Biology, Purdue University, West Lafayette, IN, 47907, USA
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91
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Napoleão TA, Soares G, Vital CE, Bastos C, Castro R, Loureiro ME, Giordano A. Methyl jasmonate and salicylic acid are able to modify cell wall but only salicylic acid alters biomass digestibility in the model grass Brachypodium distachyon. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 263:46-54. [PMID: 28818383 DOI: 10.1016/j.plantsci.2017.06.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 06/28/2017] [Accepted: 06/30/2017] [Indexed: 06/07/2023]
Abstract
In addition to playing a key role in the response to environmental changes, cell walls are also considered as a valuable feedstock for cellulosic ethanol. Here we explored the effects of the stress-response hormones, salicylic acid and methyl jasmonate, on cell wall biosynthesis and biomass digestibility in Brachypodium distachyon, a species recently considered as a suitable model for biomass conversion. We found that in response to salicylic acid or methyl jasmonate treatment, plant growth was reduced coupled with significant changes in cell wall composition. Cellulose content increased in response to methyl jasmonate whereas a reduction in lignin content was found after salicylic acid application. Moreover, hemicellulose composition was altered and increases in caffeic acid, ferulic acid and p-coumaric acid content were detected in response to both treatments. The hormonal profile and the expression pattern of genes involved in cell wall biosynthesis were also modified. Biomass digestibility was reduced in leaf tissue after salicylic acid treatment and was negatively correlated with ferulic acid and p-coumaric acid content. The results obtained here aid in our understanding of cell wall dynamics in response to stress and will enable the development of new strategies to improve cell wall digestibility in bioenergy feedstock.
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Affiliation(s)
- Thiago Alves Napoleão
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Giuliana Soares
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Camilo Elber Vital
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Carla Bastos
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Robson Castro
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Marcelo Ehlers Loureiro
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Andrea Giordano
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.
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92
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Chen Y, Li F, Tian L, Huang M, Deng R, Li X, Chen W, Wu P, Li M, Jiang H, Wu G. The Phenylalanine Ammonia Lyase Gene LjPAL1 Is Involved in Plant Defense Responses to Pathogens and Plays Diverse Roles in Lotus japonicus-Rhizobium Symbioses. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2017; 30:739-753. [PMID: 28598263 DOI: 10.1094/mpmi-04-17-0080-r] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Phenylalanine ammonia lyase (PAL) is important in the biosynthesis of plant secondary metabolites that regulate growth responses. Although its function is well-established in various plants, the functional significance of PAL genes in nodulation is poorly understood. Here, we demonstrate that the Lotus japonicus PAL (LjPAL1) gene is induced by Mesorhizobium loti infection and methyl-jasmonate (Me-JA) treatment in roots. LjPAL1 altered PAL activity, leading to changes in lignin contents and thicknesses of cell walls in roots and nodules of transgenic plants and, hence, to structural changes in roots and nodules. LjPAL1-knockdown plants (LjPAL1i) exhibited increased infection thread and nodule numbers and the induced upregulation of nodulin gene expression after M. loti infection. Conversely, LjPAL1 overexpression delayed the infection process and reduced infection thread and nodule numbers after M. loti inoculation. LjPAL1i plants also exhibited reduced endogenous salicylic acid (SA) accumulation and expression of the SA-dependent marker gene. Their infection phenotype could be partially restored by exogenous SA or Me-JA application. Our data demonstrate that LjPAL1 plays diverse roles in L. japonicus-rhizobium symbiosis, affecting rhizobial infection progress and nodule structure, likely by inducing lignin modification, regulating endogenous SA biosynthesis, and modulating SA signaling.
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Affiliation(s)
- Yaping Chen
- 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- 2 Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden; and
| | - Fengjiao Li
- 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- 2 Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden; and
- 3 University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lu Tian
- 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- 2 Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden; and
- 3 University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mingchao Huang
- 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- 2 Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden; and
- 3 University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rufang Deng
- 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- 2 Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden; and
| | - Xueliu Li
- 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- 2 Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden; and
- 3 University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Chen
- 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- 2 Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden; and
- 3 University of Chinese Academy of Sciences, Beijing 100049, China
| | - Pingzhi Wu
- 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- 2 Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden; and
| | - Meiru Li
- 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- 2 Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden; and
| | - Huawu Jiang
- 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- 2 Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden; and
| | - Guojiang Wu
- 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- 2 Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden; and
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93
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Wu Y, Wang W, Li Y, Dai X, Ma G, Xing D, Zhu M, Gao L, Xia T. Six phenylalanine ammonia-lyases from Camellia sinensis: Evolution, expression, and kinetics. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2017; 118:413-421. [PMID: 28711790 DOI: 10.1016/j.plaphy.2017.06.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 06/20/2017] [Accepted: 06/28/2017] [Indexed: 06/07/2023]
Abstract
Phenylalanine ammonia-lyase (PAL), the branch point enzyme controlling the flow of primary metabolism into second metabolism, converts the L-phenylalanine (L-Phe) to yield cinnamic acid. Based on the sequencing data available from eight transcriptome projects, six PAL genes have been screened out, cloned, and designated as CsPALa-CsPALf. The phylogenetic tree showed that CsPALs were divided into three subgroups, PALa and PALb, PALc and PALd, and PALe and PALf. All six CsPALs exhibited indiscriminate cytosolic locations in epidermis cells and mesophyll cells. Then, the expression profiles of six PAL genes were qualitatively investigated and they displayed tissue-/induced-expression specificity in several tissues or under different exogenous treatments. Furthermore, in vitro enzymatic assays showed that all six recombinant proteins were characterized by the strict substrate specificity toward L-Phe, but no activity toward L-Tyr, and they displayed subtle differences in kinetics and enzymatic properties. These results indicate that CsPALs play both distinct and overlapping roles in plant growth and responses to environmental cues.
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Affiliation(s)
- Yingling Wu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Wenzhao Wang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Yanzhi Li
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Xinlong Dai
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Guoliang Ma
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Dawei Xing
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Mengqing Zhu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Liping Gao
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Tao Xia
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, China.
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94
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Biotechnological Strategies to Improve Plant Biomass Quality for Bioethanol Production. BIOMED RESEARCH INTERNATIONAL 2017; 2017:7824076. [PMID: 28951875 PMCID: PMC5603102 DOI: 10.1155/2017/7824076] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 07/13/2017] [Accepted: 07/19/2017] [Indexed: 11/17/2022]
Abstract
The transition from an economy dependent on nonrenewable energy sources to one with higher diversity of renewables will not be a simple process. It requires an important research effort to adapt to the dynamics of the changing energy market, sort costly processes, and avoid overlapping with social interest markets such as food and livestock production. In this review, we analyze the desirable traits of raw plant materials for the bioethanol industry and the molecular biotechnology strategies employed to improve them, in either plants already under use (as maize) or proposed species (large grass families). The fundamentals of these applications can be found in the mechanisms by which plants have evolved different pathways to manage carbon resources for reproduction or survival in unexpected conditions. Here, we review the means by which this information can be used to manipulate these mechanisms for commercial uses, including saccharification improvement of starch and cellulose, decrease in cell wall recalcitrance through lignin modification, and increase in plant biomass.
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95
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Sibout R, Proost S, Hansen BO, Vaid N, Giorgi FM, Ho-Yue-Kuang S, Legée F, Cézart L, Bouchabké-Coussa O, Soulhat C, Provart N, Pasha A, Le Bris P, Roujol D, Hofte H, Jamet E, Lapierre C, Persson S, Mutwil M. Expression atlas and comparative coexpression network analyses reveal important genes involved in the formation of lignified cell wall in Brachypodium distachyon. THE NEW PHYTOLOGIST 2017; 215:1009-1025. [PMID: 28617955 DOI: 10.1111/nph.14635] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 04/26/2017] [Indexed: 05/08/2023]
Abstract
While Brachypodium distachyon (Brachypodium) is an emerging model for grasses, no expression atlas or gene coexpression network is available. Such tools are of high importance to provide insights into the function of Brachypodium genes. We present a detailed Brachypodium expression atlas, capturing gene expression in its major organs at different developmental stages. The data were integrated into a large-scale coexpression database ( www.gene2function.de), enabling identification of duplicated pathways and conserved processes across 10 plant species, thus allowing genome-wide inference of gene function. We highlight the importance of the atlas and the platform through the identification of duplicated cell wall modules, and show that a lignin biosynthesis module is conserved across angiosperms. We identified and functionally characterised a putative ferulate 5-hydroxylase gene through overexpression of it in Brachypodium, which resulted in an increase in lignin syringyl units and reduced lignin content of mature stems, and led to improved saccharification of the stem biomass. Our Brachypodium expression atlas thus provides a powerful resource to reveal functionally related genes, which may advance our understanding of important biological processes in grasses.
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Affiliation(s)
- Richard Sibout
- Institut Jean-Pierre Bourgin, UMR 1318, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, Versailles Cedex, 78026, France
| | - Sebastian Proost
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg 1, Potsdam, 14476, Germany
| | - Bjoern Oest Hansen
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg 1, Potsdam, 14476, Germany
| | - Neha Vaid
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg 1, Potsdam, 14476, Germany
| | - Federico M Giorgi
- Cancer Research UK, Cambridge Institute, Robinson Way, Cambridge, CB2 0RE, UK
| | - Severine Ho-Yue-Kuang
- Institut Jean-Pierre Bourgin, UMR 1318, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, Versailles Cedex, 78026, France
| | - Frédéric Legée
- Institut Jean-Pierre Bourgin, UMR 1318, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, Versailles Cedex, 78026, France
| | - Laurent Cézart
- Institut Jean-Pierre Bourgin, UMR 1318, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, Versailles Cedex, 78026, France
| | - Oumaya Bouchabké-Coussa
- Institut Jean-Pierre Bourgin, UMR 1318, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, Versailles Cedex, 78026, France
| | - Camille Soulhat
- Institut Jean-Pierre Bourgin, UMR 1318, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, Versailles Cedex, 78026, France
| | - Nicholas Provart
- Department of Cell and Systems Biology, Centre for the Analysis of Genome Evolution and Function, University of Toronto, 25 Willcocks St., Toronto, ON, M5S 3B2, Canada
| | - Asher Pasha
- Department of Cell and Systems Biology, Centre for the Analysis of Genome Evolution and Function, University of Toronto, 25 Willcocks St., Toronto, ON, M5S 3B2, Canada
| | - Philippe Le Bris
- Institut Jean-Pierre Bourgin, UMR 1318, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, Versailles Cedex, 78026, France
| | - David Roujol
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, Castanet-Tolosan, France
| | - Herman Hofte
- Institut Jean-Pierre Bourgin, UMR 1318, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, Versailles Cedex, 78026, France
| | - Elisabeth Jamet
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, Castanet-Tolosan, France
| | - Catherine Lapierre
- Institut Jean-Pierre Bourgin, UMR 1318, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, Versailles Cedex, 78026, France
| | - Staffan Persson
- School of Biosciences, University of Melbourne, Parkville, Vic., 3010, Australia
| | - Marek Mutwil
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg 1, Potsdam, 14476, Germany
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96
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Lam PY, Tobimatsu Y, Takeda Y, Suzuki S, Yamamura M, Umezawa T, Lo C. Disrupting Flavone Synthase II Alters Lignin and Improves Biomass Digestibility. PLANT PHYSIOLOGY 2017; 174:972-985. [PMID: 28385728 PMCID: PMC5462022 DOI: 10.1104/pp.16.01973] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 03/30/2017] [Indexed: 05/02/2023]
Abstract
Lignin, a ubiquitous phenylpropanoid polymer in vascular plant cell walls, is derived primarily from oxidative couplings of monolignols (p-hydroxycinnamyl alcohols). It was discovered recently that a wide range of grasses, including cereals, utilize a member of the flavonoids, tricin (3',5'-dimethoxyflavone), as a natural comonomer with monolignols for cell wall lignification. Previously, we established that cytochrome P450 93G1 is a flavone synthase II (OsFNSII) indispensable for the biosynthesis of soluble tricin-derived metabolites in rice (Oryza sativa). Here, our tricin-deficient fnsII mutant was analyzed further with an emphasis on its cell wall structure and properties. The mutant is similar in growth to wild-type control plants with normal vascular morphology. Chemical and nuclear magnetic resonance structural analyses demonstrated that the mutant lignin is completely devoid of tricin, indicating that FNSII activity is essential for the deposition of tricin-bound lignin in rice cell walls. The mutant also showed substantially reduced lignin content with decreased syringyl/guaiacyl lignin unit composition. Interestingly, the loss of tricin in the mutant lignin appears to be partially compensated by incorporating naringenin, which is a preferred substrate of OsFNSII. The fnsII mutant was further revealed to have enhanced enzymatic saccharification efficiency, suggesting that the cell wall recalcitrance of grass biomass may be reduced through the manipulation of the flavonoid monomer supply for lignification.
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Affiliation(s)
- Pui Ying Lam
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China (P.Y.L., C.L.); and
- Research Institute for Sustainable Humanosphere (Y.To., Y.Ta., S.S., M.Y., T.U.) and Research Unit for Global Sustainability Studies (T.U.), Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Yuki Tobimatsu
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China (P.Y.L., C.L.); and
- Research Institute for Sustainable Humanosphere (Y.To., Y.Ta., S.S., M.Y., T.U.) and Research Unit for Global Sustainability Studies (T.U.), Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Yuri Takeda
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China (P.Y.L., C.L.); and
- Research Institute for Sustainable Humanosphere (Y.To., Y.Ta., S.S., M.Y., T.U.) and Research Unit for Global Sustainability Studies (T.U.), Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Shiro Suzuki
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China (P.Y.L., C.L.); and
- Research Institute for Sustainable Humanosphere (Y.To., Y.Ta., S.S., M.Y., T.U.) and Research Unit for Global Sustainability Studies (T.U.), Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Masaomi Yamamura
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China (P.Y.L., C.L.); and
- Research Institute for Sustainable Humanosphere (Y.To., Y.Ta., S.S., M.Y., T.U.) and Research Unit for Global Sustainability Studies (T.U.), Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Toshiaki Umezawa
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China (P.Y.L., C.L.); and
- Research Institute for Sustainable Humanosphere (Y.To., Y.Ta., S.S., M.Y., T.U.) and Research Unit for Global Sustainability Studies (T.U.), Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Clive Lo
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China (P.Y.L., C.L.); and
- Research Institute for Sustainable Humanosphere (Y.To., Y.Ta., S.S., M.Y., T.U.) and Research Unit for Global Sustainability Studies (T.U.), Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
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97
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Kuglerová L, García L, Pardo I, Mottiar Y, Richardson JS. Does leaf litter from invasive plants contribute the same support of a stream ecosystem function as native vegetation? Ecosphere 2017. [DOI: 10.1002/ecs2.1779] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Lenka Kuglerová
- Department of Forest and Conservation Sciences University of British Columbia Vancouver British Columbia V6T 1Z4 Canada
| | - Liliana García
- Departamento de Ecología y Biología Animal Universidad de Vigo Campus As Lagoas – Marcosende 36310 Vigo Spain
| | - Isabel Pardo
- Departamento de Ecología y Biología Animal Universidad de Vigo Campus As Lagoas – Marcosende 36310 Vigo Spain
| | - Yaseen Mottiar
- Department of Wood Science University of British Columbia Vancouver British Columbia V6T 1Z4 Canada
| | - John S. Richardson
- Department of Forest and Conservation Sciences University of British Columbia Vancouver British Columbia V6T 1Z4 Canada
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98
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Eloy NB, Voorend W, Lan W, Saleme MDLS, Cesarino I, Vanholme R, Smith RA, Goeminne G, Pallidis A, Morreel K, Nicomedes J, Ralph J, Boerjan W. Silencing CHALCONE SYNTHASE in Maize Impedes the Incorporation of Tricin into Lignin and Increases Lignin Content. PLANT PHYSIOLOGY 2017; 173:998-1016. [PMID: 27940492 PMCID: PMC5291018 DOI: 10.1104/pp.16.01108] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 12/06/2016] [Indexed: 05/18/2023]
Abstract
Lignin is a phenolic heteropolymer that is deposited in secondary-thickened cell walls, where it provides mechanical strength. A recent structural characterization of cell walls from monocot species showed that the flavone tricin is part of the native lignin polymer, where it is hypothesized to initiate lignin chains. In this study, we investigated the consequences of altered tricin levels on lignin structure and cell wall recalcitrance by phenolic profiling, nuclear magnetic resonance, and saccharification assays of the naturally silenced maize (Zea mays) C2-Idf (inhibitor diffuse) mutant, defective in the CHALCONE SYNTHASE Colorless2 (C2) gene. We show that the C2-Idf mutant produces highly reduced levels of apigenin- and tricin-related flavonoids, resulting in a strongly reduced incorporation of tricin into the lignin polymer. Moreover, the lignin was enriched in β-β and β-5 units, lending support to the contention that tricin acts to initiate lignin chains and that, in the absence of tricin, more monolignol dimerization reactions occur. In addition, the C2-Idf mutation resulted in strikingly higher Klason lignin levels in the leaves. As a consequence, the leaves of C2-Idf mutants had significantly reduced saccharification efficiencies compared with those of control plants. These findings are instructive for lignin engineering strategies to improve biomass processing and biochemical production.
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Affiliation(s)
- Nubia B Eloy
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - Wannes Voorend
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - Wu Lan
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - Marina de Lyra Soriano Saleme
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - Igor Cesarino
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - Ruben Vanholme
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - Rebecca A Smith
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - Geert Goeminne
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - Andreas Pallidis
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - Kris Morreel
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - José Nicomedes
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - John Ralph
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.)
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.)
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
| | - Wout Boerjan
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.);
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium (N.B.E., W.V., M.d.L.S.S., I.C., R.V., G.G., A.P., K.M., J.N., W.B.);
- Department of Botany, Institute of Biosciences, University of São Paulo, Butantã, Sao Paulo SP 05508-090, Brazil (I.C.);
- Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726 (W.L., R.A.S., J.R.); and
- Department of Biological System Engineering (W.L., J.R.) and Department of Biochemistry (R.A.S., J.R.), University of Wisconsin, Madison, Wisconsin 53706
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Glaubitz U, Li X, Schaedel S, Erban A, Sulpice R, Kopka J, Hincha DK, Zuther E. Integrated analysis of rice transcriptomic and metabolomic responses to elevated night temperatures identifies sensitivity- and tolerance-related profiles. PLANT, CELL & ENVIRONMENT 2017; 40:121-137. [PMID: 27761892 DOI: 10.1111/pce.12850] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 10/12/2016] [Accepted: 10/15/2016] [Indexed: 05/05/2023]
Abstract
Transcript and metabolite profiling were performed on leaves from six rice cultivars under high night temperature (HNT) condition. Six genes were identified as central for HNT response encoding proteins involved in transcription regulation, signal transduction, protein-protein interactions, jasmonate response and the biosynthesis of secondary metabolites. Sensitive cultivars showed specific changes in transcript abundance including abiotic stress responses, changes of cell wall-related genes, of ABA signaling and secondary metabolism. Additionally, metabolite profiles revealed a highly activated TCA cycle under HNT and concomitantly increased levels in pathways branching off that could be corroborated by enzyme activity measurements. Integrated data analysis using clustering based on one-dimensional self-organizing maps identified two profiles highly correlated with HNT sensitivity. The sensitivity profile included genes of the functional bins abiotic stress, hormone metabolism, cell wall, signaling, redox state, transcription factors, secondary metabolites and defence genes. In the tolerance profile, similar bins were affected with slight differences in hormone metabolism and transcription factor responses. Metabolites of the two profiles revealed involvement of GABA signaling, thus providing a link to the TCA cycle status in sensitive cultivars and of myo-inositol as precursor for inositol phosphates linking jasmonate signaling to the HNT response specifically in tolerant cultivars.
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Affiliation(s)
- Ulrike Glaubitz
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476, Potsdam, Germany
| | - Xia Li
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476, Potsdam, Germany
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Haidian District, Beijing, 100081, China
| | - Sandra Schaedel
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476, Potsdam, Germany
- ICRC Weyer GmbH, Bölschestraße 35, D-12587, Berlin, Germany
| | - Alexander Erban
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476, Potsdam, Germany
| | - Ronan Sulpice
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476, Potsdam, Germany
- Plant Systems Biology Research Lab, Plant and AgriBiosciences Research Centre, Botany and Plant Science, National University of Galway, Galway, Ireland
| | - Joachim Kopka
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476, Potsdam, Germany
| | - Dirk K Hincha
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476, Potsdam, Germany
| | - Ellen Zuther
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476, Potsdam, Germany
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100
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Pascual MB, El-Azaz J, de la Torre FN, Cañas RA, Avila C, Cánovas FM. Biosynthesis and Metabolic Fate of Phenylalanine in Conifers. FRONTIERS IN PLANT SCIENCE 2016; 7:1030. [PMID: 27468292 PMCID: PMC4942462 DOI: 10.3389/fpls.2016.01030] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 06/30/2016] [Indexed: 05/18/2023]
Abstract
The amino acid phenylalanine (Phe) is a critical metabolic node that plays an essential role in the interconnection between primary and secondary metabolism in plants. Phe is used as a protein building block but it is also as a precursor for numerous plant compounds that are crucial for plant reproduction, growth, development, and defense against different types of stresses. The metabolism of Phe plays a central role in the channeling of carbon from photosynthesis to the biosynthesis of phenylpropanoids. The study of this metabolic pathway is particularly relevant in trees, which divert large amounts of carbon into the biosynthesis of Phe-derived compounds, particularly lignin, an important constituent of wood. The trunks of trees are metabolic sinks that consume a considerable percentage of carbon and energy from photosynthesis, and carbon is finally immobilized in wood. This paper reviews recent advances in the biosynthesis and metabolic utilization of Phe in conifer trees. Two alternative routes have been identified: the ancient phenylpyruvate pathway that is present in microorganisms, and the arogenate pathway that possibly evolved later during plant evolution. Additionally, an efficient nitrogen recycling mechanism is required to maintain sustained growth during xylem formation. The relevance of phenylalanine metabolic pathways in wood formation, the biotic interactions, and ultraviolet protection is discussed. The genetic manipulation and transcriptional regulation of the pathways are also outlined.
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Affiliation(s)
| | | | | | | | | | - Francisco M. Cánovas
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de MálagaMálaga, Spain
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