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Chen S, Qiu G. Physiological and multi-omics analysis reveals the influence of copper on Halophila beccarii Asch. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 212:108785. [PMID: 38824692 DOI: 10.1016/j.plaphy.2024.108785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 05/09/2024] [Accepted: 05/29/2024] [Indexed: 06/04/2024]
Abstract
High concentrations of copper can pollute coastal waters, primarily from agricultural runoff and mining activities, which can harm marine organisms, including seagrasses. The molecular mechanism of copper toxicity to seagrass currently remains unclear. To determine the response to copper, physiological and multi-omic analyses were conducted to explore the molecular mechanism by which copper affects the global threatened seagrass Halophila beccarii Asch. Excessive copper stress causes oxidative damage and stimulates the activity of the antioxidant enzyme system to remove excess reactive oxygen species (ROS), thereby reducing the damage caused by copper stress. Cu increases the activities of superoxide dismutase (EC 1.15.1.1), catalase (EC 1.11.1.6), peroxidase (EC 1.11.1.7), ascorbate peroxidase (EC 1.11.1.11), glutathione peroxidase (EC 1.11.1.9), ascorbate oxidase (EC 1.10.3.3), glutathione reductase (EC 1.6.4.2), and dehydroascorbate reductase (EC 1.8.5.1) and the content of malondialdehyde and reduces the activity of monodehydroascorbate reductase (EC 1.6.5.4). Under copper stress, H. beccarii upregulates the metabolic pathways of steroid biosynthesis and cutin, suberin, and wax biosynthesis, downregulates the metabolic pathways of arginine and proline metabolism and fructose and mannose metabolism; the levels of expression of the ribosome-related genes; upregulates the levels of expression of circadian rhythm-related proteins and downregulates the levels of glutathione metabolism and the proteins related to carbon fixation. This study provides new insights into the response of seagrass to copper stress and reports potential candidate metabolites, genes, and proteins that can be considered as biomarkers to improve the protection and management of seagrass meadows.
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Affiliation(s)
- Siting Chen
- Guangxi Key Lab of Mangrove Conservation and Utilization, Guangxi Academy of Marine Sciences (Guangxi Mangrove Research Center), Guangxi Academy of Sciences, Beihai, Guangxi, 536007, China.
| | - Guanglong Qiu
- Guangxi Key Lab of Mangrove Conservation and Utilization, Guangxi Academy of Marine Sciences (Guangxi Mangrove Research Center), Guangxi Academy of Sciences, Beihai, Guangxi, 536007, China.
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Zhao YW, Li WK, Wang CK, Sun Q, Wang WY, Huang XY, Xiang Y, Hu DG. MdPRX34L, a class III peroxidase gene, activates the immune response in apple to the fungal pathogen Botryosphaeria dothidea. PLANTA 2024; 259:86. [PMID: 38453695 DOI: 10.1007/s00425-024-04355-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 01/27/2024] [Indexed: 03/09/2024]
Abstract
MAIN CONCLUSION MdPRX34L enhanced resistance to Botryosphaeria dothidea by increasing salicylic acid (SA) and abscisic acid (ABA) content as well as the expression of related defense genes. The class III peroxidase (PRX) multigene family is involved in complex biological processes. However, the molecular mechanism of PRXs in the pathogen defense of plants against Botryosphaeria dothidea (B. dothidea) remains unclear. Here, we cloned the PRX gene MdPRX34L, which was identified as a positive regulator of the defense response to B. dothidea, from the apple cultivar 'Royal Gala.' Overexpression of MdPRX34L in apple calli decreased sensitivity to salicylic acid (SA) and abscisic acid(ABA). Subsequently, overexpression of MdPRX34L in apple calli increased resistance to B. dothidea infection. In addition, SA contents and the expression levels of genes related to SA synthesis and signaling in apple calli overexpressing MdPRX34L were higher than those in the control after inoculation, suggesting that MdPRX34L enhances resistance to B. dothidea via the SA pathway. Interestingly, infections in apple calli by B. dothidea caused an increase in endogenous levels of ABA followed by induction of ABA-related genes expression. These findings suggest a potential mechanism by which MdPRX34L enhances plant-pathogen defense against B. dothidea by regulating the SA and ABA pathways.
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Affiliation(s)
- Yu-Wen Zhao
- National Research Center for Apple Engineering and Technology; Shandong Collaborative Innovation Center of Fruit and Vegetable Quality and Efficient Production; College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, China
| | - Wan-Kun Li
- National Research Center for Apple Engineering and Technology; Shandong Collaborative Innovation Center of Fruit and Vegetable Quality and Efficient Production; College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, China
| | - Chu-Kun Wang
- National Research Center for Apple Engineering and Technology; Shandong Collaborative Innovation Center of Fruit and Vegetable Quality and Efficient Production; College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, China
| | - Quan Sun
- National Research Center for Apple Engineering and Technology; Shandong Collaborative Innovation Center of Fruit and Vegetable Quality and Efficient Production; College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, China
| | - Wen-Yan Wang
- National Research Center for Apple Engineering and Technology; Shandong Collaborative Innovation Center of Fruit and Vegetable Quality and Efficient Production; College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, China
| | - Xiao-Yu Huang
- National Research Center for Apple Engineering and Technology; Shandong Collaborative Innovation Center of Fruit and Vegetable Quality and Efficient Production; College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, China
| | - Ying Xiang
- National Research Center for Apple Engineering and Technology; Shandong Collaborative Innovation Center of Fruit and Vegetable Quality and Efficient Production; College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, China
| | - Da-Gang Hu
- National Research Center for Apple Engineering and Technology; Shandong Collaborative Innovation Center of Fruit and Vegetable Quality and Efficient Production; College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, China.
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Álvarez A, Oliveros D, Ávila YC, Sabogal Palma AC, Murillo W, Joli JE, Bermúdez-Cardona MB, Guarnizo N. Resistance induction with silicon in Hass avocado plants inoculated with Phytophthora cinnamomi Rands. PLANT SIGNALING & BEHAVIOR 2023; 18:2178362. [PMID: 36814118 PMCID: PMC9980686 DOI: 10.1080/15592324.2023.2178362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 01/30/2023] [Accepted: 02/02/2023] [Indexed: 06/18/2023]
Abstract
Root rot caused by Phytophthora cinnamomi Rands, is one of the main factors that limits avocado production worldwide; silicon as a defense inducer seems to be a viable strategy to integrate into the management of this disease. Hereby, the present study evaluated the induction of resistance with silicon in Hass avocado plants inoculated with P. cinnamomi, as a possible alternative to conventional agrochemical management. A potassium silicate solution (10 mL, 0.2 M expressed as SiO2) was applied by irrigation, for ten days before inoculation with P. cinnamomi in Hass avocado plants. Leaf samples were taken at 3, 24, 144, and 312 h after inoculation with the pathogen. Peroxidase (POD) and polyphenol oxidase (PPO) enzymes had their highest activity 3 h after pathogen inoculation (p < .05). There was a decrease in the activity of the enzyme phenylalanine ammonialyase (PAL), in the content of total phenols, and the inhibition capacity of the DPPH● radical, between 3 h and 24 h in the plants with the inducer and inoculated with P. cinnamomi (p < .05). The results suggest a beneficial effect of silicon as a defense inducer in Hass avocado plants, manifested in the activation of enzymatic pathways related to the regulation of oxidative stress and the synthesis of structural components. Therefore, the application of silicon as a defense inducer emerges as a strategy to include in the integrated management of the disease caused by P. cinnamomi in Hass avocado.
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Affiliation(s)
- Andree Álvarez
- Departamento de Química, Facultad de Ciencias, Universidad del Tolima, Ibagué, Colombia
| | - Diego Oliveros
- Departamento de Química, Facultad de Ciencias, Universidad del Tolima, Ibagué, Colombia
| | - Yalile C. Ávila
- Departamento de Química, Facultad de Ciencias, Universidad del Tolima, Ibagué, Colombia
| | - Angie Carolina Sabogal Palma
- Departamento de Química, Facultad de Ciencias, Universidad del Tolima, Ibagué, Colombia
- Instituto de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Medellín, Colombia
| | - Walter Murillo
- Departamento de Química, Facultad de Ciencias, Universidad del Tolima, Ibagué, Colombia
| | - Jordi Eras Joli
- Departamento de Química, Servicios Científico Técnicos-TCEM, Universidad de Lleida, Lleida, España
| | | | - Nathalie Guarnizo
- Departamento de Química, Facultad de Ciencias, Universidad del Tolima, Ibagué, Colombia
- Departamento de Química, ETSEA, Universidad de Lleida, Lleida, España
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Gao Y, Zhang X, Wang X, Zhang Q, Tang H, Qiu T, Zhang H, Zhao B, Wang H, Liang X, Guo Y. Exogenous DCPTA Treatment Increases Mung Bean Yield by Improving Carbon Metabolism Pathway and Up-Regulating Photosynthetic Capacity and Antioxidants. FRONTIERS IN PLANT SCIENCE 2022; 13:796694. [PMID: 35498667 PMCID: PMC9039728 DOI: 10.3389/fpls.2022.796694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
Mung bean is characterized by having a good edible and medicinal value, while its flowers and pods have low production. Being a tertiary amine, DCPTA [2-(3,4-dichlorophenoxy) triethylamine] substantially regulates the growth and development of crops, maintaining production. Yet it is still limited in terms of the regulation of DCPTA on growth and development, including the yield and sugar metabolism of mung bean. In this study, DCPTA was sprayed at the beginning of mung flowering through a two-season cultivation, to assess its effects on the yield, leaf area per plant, plant height, seed setting rate, photosynthesis, chlorophyll content, and endogenous protective enzymes. Experimental results illustrated that relative to the control (CK), the DCPTA application significantly (p < 0.05) improved the yield of Bailv 11 mung bean, which rose to 6.9% in 2020 and 7.8% in 2021, respectively. This effect positively corresponded to a significant (p<0.05) increase in the number of pods and grains per plant and pod setting rate, but a non-significant difference in 1,000-grain weight. DCPA application also increased the area and fresh weight of leaf, mung height, and its organ dry weight (i.e., leaf, branch, and stem). During plant growth over DCPTA application, the increased activities of SOD, POD, and CAT improved the net photosynthetic rate, stomatal conductance, and transpiration. In addition, transcriptome sequencing further demonstrated that DCPTA treatment significantly (p < 0.05) up-regulated the sucrose synthase, invertase, and fructose kinase in all organs (i.e., leaves, pod skins, and grains) of the plant. In particular, this effect was much greater in the sucrose synthesis (i.e., sucrose content) in leaves. Our study, therefore, concludes that DCPTA application promotes the yield of mung bean via likely enhancing its photosynthetic capacity and sucrose synthase, fructokinase, and beta-fructofuranosidase expression regulation.
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Affiliation(s)
- Yuling Gao
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, China
- National Coarse Cereals Engineering Research Center, Daqing, China
- Heilongjiang Provincial Key Laboratory of Crop Pest Interaction Biology and Ecological Control, Daqing, China
- Heilongjiang Province Cultivating Collaborative Innovation Center for The Beidahuang Modern Agricultural Industry Technology, Daqing, China
| | | | - Xin Wang
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, China
- National Coarse Cereals Engineering Research Center, Daqing, China
| | - Qi Zhang
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, China
- National Coarse Cereals Engineering Research Center, Daqing, China
| | - Huarong Tang
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, China
- National Coarse Cereals Engineering Research Center, Daqing, China
| | - Tian Qiu
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, China
- National Coarse Cereals Engineering Research Center, Daqing, China
| | - HuiLai Zhang
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, China
- National Coarse Cereals Engineering Research Center, Daqing, China
| | - Bingxin Zhao
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, China
- National Coarse Cereals Engineering Research Center, Daqing, China
| | - Hao Wang
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, China
- National Coarse Cereals Engineering Research Center, Daqing, China
| | - Xilong Liang
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, China
- Heilongjiang Plant Growth Regulator Engineering Technology Research Center, Daqing, China
| | - Yongxia Guo
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, China
- National Coarse Cereals Engineering Research Center, Daqing, China
- Heilongjiang Provincial Key Laboratory of Crop Pest Interaction Biology and Ecological Control, Daqing, China
- Heilongjiang Province Cultivating Collaborative Innovation Center for The Beidahuang Modern Agricultural Industry Technology, Daqing, China
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Cacas J, Pré M, Pizot M, Cissoko M, Diedhiou I, Jalloul A, Doumas P, Nicole M, Champion A. GhERF-IIb3 regulates the accumulation of jasmonate and leads to enhanced cotton resistance to blight disease. MOLECULAR PLANT PATHOLOGY 2017; 18:825-836. [PMID: 27291786 PMCID: PMC6638235 DOI: 10.1111/mpp.12445] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 06/07/2016] [Accepted: 06/09/2016] [Indexed: 05/29/2023]
Abstract
The phytohormone jasmonic acid (JA) and its derivatives, collectively referred to as jasmonates, regulate many developmental processes, but are also involved in the response to numerous abiotic/biotic stresses. Thus far, powerful reverse genetic strategies employing perception, signalling or biosynthesis mutants have broadly contributed to our understanding of the role of JA in the plant stress response and development, as has the chemical gain-of-function approach based on exogenous application of the hormone. However, there is currently no method that allows for tightly controlled JA production in planta. By investigating the control of the JA synthesis pathway in bacteria-infected cotton (Gossypium hirsutum L.) plants, we identified a transcription factor (TF), named GhERF-IIb3, which acts as a positive regulator of the JA pathway. Expression of this well-conserved TF in cotton leaves was sufficient to produce in situ JA accumulation at physiological concentrations associated with an enhanced cotton defence response to bacterial infection.
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Affiliation(s)
- Jean‐Luc Cacas
- Institut Jean‐Pierre Bourgin, UMR1318 INRA‐AgroParisTech Centre INRA de Versailles‐GrignonRoute de St. Cyr78026Versailles CedexFrance
| | - Martial Pré
- Institut de Recherche pour le Développement (IRD), Unités Mixte de Recherche DIADE (DIversité Adaptation et DEveloppement des plantes) et IPME (Interactions Plantes‐Microorganismes‐Environnement)911 avenue Agropolis, BP 64501, 34394 Montpellier Cedex 5France
| | - Maxime Pizot
- Institut de Recherche pour le Développement (IRD), Unités Mixte de Recherche DIADE (DIversité Adaptation et DEveloppement des plantes) et IPME (Interactions Plantes‐Microorganismes‐Environnement)911 avenue Agropolis, BP 64501, 34394 Montpellier Cedex 5France
| | - Maimouna Cissoko
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes Associés aux Stress Environnementaux (LAPSE), Laboratoire Commun de Microbiologie (LCM)Centre de Recherche de Bel Air, BP 1386Dakar18524Senegal
| | - Issa Diedhiou
- Institut de Recherche pour le Développement (IRD), Unités Mixte de Recherche DIADE (DIversité Adaptation et DEveloppement des plantes) et IPME (Interactions Plantes‐Microorganismes‐Environnement)911 avenue Agropolis, BP 64501, 34394 Montpellier Cedex 5France
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes Associés aux Stress Environnementaux (LAPSE), Laboratoire Commun de Microbiologie (LCM)Centre de Recherche de Bel Air, BP 1386Dakar18524Senegal
| | - Aida Jalloul
- Department of Plant Protection, Faculty of AgronomyUniversity of DamascusDamascusBox 113Syria
| | - Patrick Doumas
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche Biochimie et Physiologie Moléculaire des PlantesMontpellier34060France
| | - Michel Nicole
- Institut de Recherche pour le Développement (IRD), Unités Mixte de Recherche DIADE (DIversité Adaptation et DEveloppement des plantes) et IPME (Interactions Plantes‐Microorganismes‐Environnement)911 avenue Agropolis, BP 64501, 34394 Montpellier Cedex 5France
| | - Antony Champion
- Institut de Recherche pour le Développement (IRD), Unités Mixte de Recherche DIADE (DIversité Adaptation et DEveloppement des plantes) et IPME (Interactions Plantes‐Microorganismes‐Environnement)911 avenue Agropolis, BP 64501, 34394 Montpellier Cedex 5France
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes Associés aux Stress Environnementaux (LAPSE), Laboratoire Commun de Microbiologie (LCM)Centre de Recherche de Bel Air, BP 1386Dakar18524Senegal
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El-Hai KA, El-Metwall M, Mohamed NT. Hydrogen Peroxide and Acetylsalicylic Acid Induce the Defense of
Lupine Against Root Rot Disease. PLANT PATHOLOGY JOURNAL 2016; 15:17-26. [DOI: 10.3923/ppj.2016.17.26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Qian Y, Hou H, Shen Q, Cai X, Sunter G, Zhou X. RepA Protein Encoded by Oat dwarf virus Elicits a Temperature-Sensitive Hypersensitive Response-Type Cell Death That Involves Jasmonic Acid-Dependent Signaling. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2016; 29:5-21. [PMID: 26720685 DOI: 10.1094/mpmi-07-15-0149-r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The hypersensitive response (HR) is a component of disease resistance that is often induced by pathogen infection, but essentially no information is available for members of the destructive mastreviruses. We have investigated an HR-type response elicited in Nicotiana species by Oat dwarf virus (ODV) and have found that expression of the ODV RepA protein but not other ODV-encoded proteins elicits the HR-type cell death associated with a burst of H2O2. Deletion mutagenesis indicates that the first nine amino acids (aa) at the N terminus of RepA and the two regions located between aa residues 173 and 195 and between aa residues 241 and 260 near the C terminus are essential for HR-type cell-death elicitation. Confocal and electron microscopy showed that the RepA protein is localized in the nuclei of plant cells and might contain bipartite nuclear localization signals. The HR-like lesions mediated by RepA were inhibited by temperatures above 30°C and involvement of jasmonic acid (JA) in HR was identified by gain- and loss-of-function experiments. To our knowledge, this is the first report of an elicitor of HR-type cell death from mastreviruses.
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Affiliation(s)
- Yajuan Qian
- 1 State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310029, People's Republic of China
| | - Huwei Hou
- 1 State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310029, People's Republic of China
- 2 State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
| | - Qingtang Shen
- 1 State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310029, People's Republic of China
| | - Xinzhong Cai
- 1 State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310029, People's Republic of China
| | - Garry Sunter
- 3 Department of Biology, University of Texas at San Antonio, San Antonio, TX 78249, U.S.A
| | - Xueping Zhou
- 1 State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310029, People's Republic of China
- 2 State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
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Suzuki H, Takashima Y, Ishiguri F, Yoshizawa N, Yokota S. Proteomic Analysis of Responsive Proteins Induced in Japanese Birch Plantlet Treated with Salicylic Acid. Proteomes 2014; 2:323-340. [PMID: 28250384 PMCID: PMC5302753 DOI: 10.3390/proteomes2030323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Revised: 05/26/2014] [Accepted: 06/10/2014] [Indexed: 01/22/2023] Open
Abstract
The present study was performed to unravel the mechanisms of systemic acquired resistance (SAR) establishment and resistance signaling pathways against the canker-rot fungus (Inonotus obliquus strain IO-U1) infection in Japanese birch plantlet No.8. Modulation of protein-profile induced by salicylic acid (SA)-administration was analyzed, and SA-responsive proteins were identified. In total, 5 specifically expressed, 3 significantly increased, and 3 significantly decreased protein spots were identified using liquid chromatography/tandem mass spectrometry (LC/MS/MS) and the sequence tag method. These proteins were malate dehydrogenase, succinate dehydrogenase, phosphoglycerate kinase, diaminopimalate decarboxylase, arginase, chorismate mutase, cyclophilin, aminopeptidase, and unknown function proteins. These proteins are considered to be involved in SAR-establishment mechanisms in the Japanese birch plantlet No 8.
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Affiliation(s)
- Hiromu Suzuki
- Department of Forest Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-machi, Utsunomiya, Tochigi 321-8505, Japan.
| | - Yuya Takashima
- Department of Forest Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-machi, Utsunomiya, Tochigi 321-8505, Japan.
| | - Futoshi Ishiguri
- Department of Forest Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-machi, Utsunomiya, Tochigi 321-8505, Japan.
| | - Nobuo Yoshizawa
- Department of Forest Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Shinso Yokota
- Department of Forest Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-machi, Utsunomiya, Tochigi 321-8505, Japan.
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High-Quality Draft Genome Sequences of Two Xanthomonas citri pv. malvacearum Strains. GENOME ANNOUNCEMENTS 2013; 1:1/4/e00674-13. [PMID: 23990578 PMCID: PMC3757453 DOI: 10.1128/genomea.00674-13] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We report high-quality draft genome sequences of two strains (race 18 and 20) of Xanthomonas citri pv. malvacearum, the causal agent of bacterial blight of cotton. Comparative genomics will help to decipher mechanisms provoking disease and triggering defense responses and to develop new molecular tools for epidemiological surveillance.
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Zhao J, Devaiah SP, Wang C, Li M, Welti R, Wang X. Arabidopsis phospholipase Dβ1 modulates defense responses to bacterial and fungal pathogens. THE NEW PHYTOLOGIST 2013; 199:228-240. [PMID: 23577648 PMCID: PMC4066384 DOI: 10.1111/nph.12256] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Accepted: 02/22/2013] [Indexed: 05/18/2023]
Abstract
Pathogen infection of higher plants often induces rapid production of phosphatidic acid (PA) and changes in lipid profiles, but the enzymatic basis and the function of the lipid change in pathogen-plant interactions are not well understood. Infection of phospholipase D β1 (PLDβ1)-deficient plants by Pseudomonas syringae tomato pv DC3000 (Pst DC30000) resulted in less bacterial growth than in wild-type plants, and the effect was more profound in virulent Pst DC3000 than avirulent Pst DC3000 (carrying the avirulence gene avrRpt2) infection. The expression levels of salicylic acid (SA)-inducible genes were higher, but those inducible by jasmonic acid (JA) showed lower expression in PLDβ1 mutants than in wild-type plants. However, PLDβ1-deficient plants were more susceptible than wild-type plants to the fungus Botrytis cinerea. The PLDβ1-deficient plants had lower levels of PA, JA and JA-related defense gene expression after B. cinerea inoculation. PLDβ1 plays a positive role in pathogen-induced JA production and plant resistance to the necrotrophic fungal pathogen B. cinerea, but a negative role in the SA-dependent signaling pathway and plant tolerance to infection with biotrophic Pst DC3000. PLDβ1 is responsible for most of the increase in PA production in response to necrotrophic B. cinerea and virulent Pst DC3000 infection, but contributes less to avirulent Pst DC3000 (avrRpt2)-induced PA production.
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Affiliation(s)
- Jian Zhao
- Department of Biochemistry, Kansas State University, Manhattan, KS, 66506 USA
- College of Plant Science and Technology, National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
| | | | - Cunxi Wang
- Department of Biochemistry, Kansas State University, Manhattan, KS, 66506 USA
| | - Maoyin Li
- Department of Biochemistry, Kansas State University, Manhattan, KS, 66506 USA
- Department of Biology, University of Missouri, St. Louis, MO 63121 and Danforth Plant Science Center, St. Louis, MO 63132 USA
| | - Ruth Welti
- Division of Biology, Kansas State University, Manhattan, KS, 66506 USA
| | - Xuemin Wang
- Department of Biochemistry, Kansas State University, Manhattan, KS, 66506 USA
- Department of Biology, University of Missouri, St. Louis, MO 63121 and Danforth Plant Science Center, St. Louis, MO 63132 USA
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Scherm B, Balmas V, Spanu F, Pani G, Delogu G, Pasquali M, Migheli Q. Fusarium culmorum: causal agent of foot and root rot and head blight on wheat. MOLECULAR PLANT PATHOLOGY 2013; 14:323-41. [PMID: 23279114 PMCID: PMC6638779 DOI: 10.1111/mpp.12011] [Citation(s) in RCA: 135] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
UNLABELLED Fusarium culmorum is a ubiquitous soil-borne fungus able to cause foot and root rot and Fusarium head blight on different small-grain cereals, in particular wheat and barley. It causes significant yield and quality losses and results in contamination of the grain with mycotoxins. This review summarizes recent research activities related to F. culmorum, including studies into its population diversity, mycotoxin biosynthesis, mechanisms of pathogenesis and resistance, the development of diagnostic tools and preliminary genome sequence surveys. We also propose potential research areas that may expand our basic understanding of the wheat-F. culmorum interaction and assist in the management of the disease caused by this pathogen. TAXONOMY Fusarium culmorum (W.G. Smith) Sacc. Kingdom Fungi; Phylum Ascomycota; Subphylum Pezizomycotina; Class Sordariomycetes; Subclass Hypocreomycetidae; Order Hypocreales; Family Nectriaceae; Genus Fusarium. DISEASE SYMPTOMS Foot and root rot (also known as Fusarium crown rot): seedling blight with death of the plant before or after emergence; brown discoloration on roots and coleoptiles of the infected seedlings; brown discoloration on subcrown internodes and on the first two/three internodes of the main stem; tiller abortion; formation of whiteheads with shrivelled white grains; Fusarium head blight: prematurely bleached spikelets or blighting of the entire head, which remains empty or contains shrunken dark kernels. IDENTIFICATION AND DETECTION: Morphological identification is based on the shape of the macroconidia formed on sporodochia on carnation leaf agar. The conidiophores are branched monophialides, short and wide. The macroconidia are relatively short and stout with an apical cell blunt or slightly papillate; the basal cell is foot-shaped or just notched. Macroconidia are thick-walled and curved, usually 3-5 septate, and mostly measuring 30-50 × 5.0-7.5 μm. Microconidia are absent. Oval to globose chlamydospores are formed, intercalary in the hyphae, solitary, in chains or in clumps; they are also formed from macroconidia. The colony grows very rapidly (1.6-2.2 cm/day) on potato dextrose agar (PDA) at the optimum temperature of 25 °C. The mycelium on PDA is floccose, whitish, light yellow or red. The pigment on the reverse plate on PDA varies from greyish-rose, carmine red or burgundy. A wide array of polymerase chain reaction (PCR) and real-time PCR tools, as well as complementary methods, which are summarised in the first two tables, have been developed for the detection and/or quantification of F. culmorum in culture and in naturally infected plant tissue. HOST RANGE Fusarium culmorum has a wide range of host plants, mainly cereals, such as wheat, barley, oats, rye, corn, sorghum and various grasses. In addition, it has been isolated from sugar beet, flax, carnation, bean, pea, asparagus, red clover, hop, leeks, Norway spruce, strawberry and potato tuber. Fusarium culmorum has also been associated with dermatitis on marram grass planters in the Netherlands, although its role as a causal agent of skin lesions appears questionable. It is also isolated as a symbiont able to confer resistance to abiotic stress, and has been proposed as a potential biocontrol agent to control the aquatic weed Hydrilla spp. USEFUL WEBSITES http://isolate.fusariumdb.org/; http://sppadbase.ipp.cnr.it/; http://www.broad.mit.edu/annotation/genome/fusarium_group/MultiHome.html; http://www.fgsc.net/Fusarium/fushome.htm; http://plantpath.psu.edu/facilities/fusarium-research-center; http://www.phi-base.org/; http://www.uniprot.org/; http://www.cabi.org/; http://www.indexfungorum.org/
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Affiliation(s)
- Barbara Scherm
- Dipartimento di Agraria-Sezione di Patologia Vegetale ed Entomologia and Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna e dell'Area Mediterranea, Università degli Studi di Sassari, Via E. De Nicola 9, I-07100 Sassari, Italy
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Affiliation(s)
- Étienne Delannoy
- Unité “Résistance des plantes”, IRD (Institut de recherche pour le développement), UMR DGPC, 911 avenue Agropolis, B.P. 64501, F-34394, Montpellier cedex
| | - Philippe Marmey
- Unité “Résistance des plantes”, IRD (Institut de recherche pour le développement), UMR DGPC, 911 avenue Agropolis, B.P. 64501, F-34394, Montpellier cedex
| | - Claude Penel
- Laboratoire de Physiologie végétale, Université de Genève, Quai Ernest-Ansermet 30, CH-1211, Genève 4
| | - Michel Nicole
- Unité “Résistance des plantes”, IRD (Institut de recherche pour le développement), UMR DGPC, 911 avenue Agropolis, B.P. 64501, F-34394, Montpellier cedex
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Belchí-Navarro S, Almagro L, Sabater-Jara AB, Fernández-Pérez F, Bru R, Pedreño MA. Induction of trans-resveratrol and extracellular pathogenesis-related proteins in elicited suspension cultured cells of Vitis vinifera cv Monastrell. JOURNAL OF PLANT PHYSIOLOGY 2013; 170:258-64. [PMID: 23127362 DOI: 10.1016/j.jplph.2012.10.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 10/04/2012] [Accepted: 10/07/2012] [Indexed: 05/08/2023]
Abstract
Suspension-cultured cells of Vitis vinifera cv Monastrell were used to investigate the effects of methyljasmonate, ethylene and salicylic acid separately or in combination with cyclodextrins on both trans-resveratrol production and the induction of defense responses. The results showed that the addition of methyljasmonate or ethylene to suspension-cultured cells jointly treated with cyclodextrins and salicylic acid provoked a decrease of trans-resveratrol levels suggesting that salicylic acid has a negative and antagonistic effect with methyljasmonate or ethylene on trans-resveratrol production. Likewise, the exogenous application of these compounds induced the accumulation of pathogenesis-related proteins. Analysis of the extracellular proteome showed the presence of amino acid sequences homologous to an specific β-1,3-glucanase, class III peroxidases and a β-1,4-mannanase, which suggests that these signal molecules could play a role in mediating defense-related gene product expression in V. vinifera cv Monastrell. Apart from these inducible proteins, other proteins were found in both the control and elicited cell cultures of V. vinifera. These included class IV chitinase, polygalacturonase inhibitor protein and reticuline oxidase-like protein, suggesting that their expression is constitutive being involved in the modification of the cell wall architecture during cell culture growth and in the prevention of pathogen attack.
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Affiliation(s)
- Sarai Belchí-Navarro
- Department of Plant Biology, University of Murcia, Campus Universitario de Espinardo, E-30100 Murcia, Spain
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14
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Manosalva PM, Bruce M, Leach JE. Rice 14-3-3 protein (GF14e) negatively affects cell death and disease resistance. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2011; 68:777-87. [PMID: 21793954 DOI: 10.1111/j.1365-313x.2011.04728.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Plant 14-3-3 proteins regulate important cellular processes, including plant immune responses, through protein-protein interactions with a wide range of target proteins. In rice (Oryza sativa), the GF14e gene, which encodes a 14-3-3 protein, is induced during effector-triggered immunity (ETI) associated with pathogens such as Xanthomonas oryzae pv. oryzae (Xoo). To determine whether the GF14e gene plays a direct role in resistance to disease in rice, we suppressed its expression by RNAi silencing. GF14e suppression was correlated with the appearance of a lesion-mimic (LM) phenotype in the transgenic plants at 3 weeks after sowing. This indicates inappropriate regulation of cell death, a phenotype that is frequently associated with enhanced resistance to pathogens. GF14e-silenced rice plants showed high levels of resistance to a virulent strain of Xoo compared with plants that were not silenced. Enhanced resistance was correlated with GF14e silencing prior to and after development of the LM phenotype, higher basal expression of a defense response peroxidase gene (POX22.3), and accumulation of reactive oxygen species (ROS). In addition, GF14e-silenced plants also exhibit enhanced resistance to the necrotrophic fungal pathogen Rhizoctonia solani. Together, our findings suggest that GF14e negatively affects the induction of plant defense response genes, cell death and broad-spectrum resistance in rice.
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Affiliation(s)
- Patricia M Manosalva
- Bioagricultural Sciences and Pest Management and Program in Plant Molecular Biology, Colorado State University, Fort Collins, CO 80523-1177, USA
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15
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Parkhi V, Kumar V, Campbell LM, Bell AA, Shah J, Rathore KS. Resistance against various fungal pathogens and reniform nematode in transgenic cotton plants expressing Arabidopsis NPR1. Transgenic Res 2010; 19:959-75. [DOI: 10.1007/s11248-010-9374-9] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Accepted: 02/01/2010] [Indexed: 11/28/2022]
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16
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Champion A, Hebrard E, Parra B, Bournaud C, Marmey P, Tranchant C, Nicole M. Molecular diversity and gene expression of cotton ERF transcription factors reveal that group IXa members are responsive to jasmonate, ethylene and Xanthomonas. MOLECULAR PLANT PATHOLOGY 2009; 10:471-85. [PMID: 19523101 PMCID: PMC6640365 DOI: 10.1111/j.1364-3703.2009.00549.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Several ethylene-response factor (ERF) transcription factors are believed to play a crucial role in the activation of plant defence responses, but little is known about the relationships between the diversity of this family and the functions of groups or individual ERFs in this process. In this study, 200 ERF genes from the unigene cotton database were identified. Conserved amino acid residues and phylogeny reconstruction using the AP2 conserved domain suggest that the classification into 10 major groups used for Arabidopsis and rice is applicable to the cotton ERF family. Based on in silico studies, we predict that group IX ERF genes in cotton are involved in jasmonate (JA), ethylene (ET) and pathogen responses. To test this hypothesis, we analysed the transcript profiles of the group IXa subfamily in the regulation of specific resistance to Xanthomonas campestris pathovar malvacearum. The expression of four members of group IXa was induced on challenge with X. campestris pv. malvacearum. Furthermore, the expression of several ERF genes of group IXa was induced synergistically by JA in combination with ET, suggesting that the encoded ERF proteins may play key roles in the integration of both signals to activate JA- and ET-dependent responses.
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Affiliation(s)
- Antony Champion
- IRD, Université Mixte de Recherche RPB 'Résistance des Plantes aux Bioagresseurs' CIRAD, Université Montpellier II, France.
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17
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Falahian F, Ardebili ZO, Fahimi F, Khavarinejad R. Effect of mycorrhizal fungi on some defense enzymes against Gaeumannomyces gaminis in wheat. Pak J Biol Sci 2009; 10:2418-22. [PMID: 19070167 DOI: 10.3923/pjbs.2007.2418.2422] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
At this research, the effect of mycorrhizal fungi (Glomus etunicatum) On Pero Xidase (POX) and Phenylalanine Ammonia Lyase (PAL) activities and isozymatic pattern against Gaeumannomyces graminis were studied in wheat plants. Seeds were planted in inoculated soils in 4 treatment groups including Control (C), Mycorrhiza (M), Pathogen (P) and Pathogen- Mycorrhiza (PM). Plants were harvested 17 days after inoculation. POX activities in PM group were significantly greater than control group. Significant differences were not observed between P and C groups. POX activities significantly decreased in M group. PAL activities in M group were significantly greater than other groups. PAL activities in P and PM groups were significantly greater than C group. The appearance of new isozyme was induced in PM group. It is highly probable that induced POX isozymic activity and/or appearance of new isozymes may be responsible for elevated POX activity. Present results showed that the isozymatic patterns of POX were changed by inoculation ofmycorrhiza and/or pathogen. The obtained results from this research is agreement with other researches about the enhancing effect of mycorrhizal fungi on PAL activity. The obtained results from the present research, confirm this opinion that defense related proteins is not induced in compatible interactions or is weak.
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Affiliation(s)
- F Falahian
- Science and Research Campus, Islamic Azad University, Tehran, Iran
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Almagro L, Gómez Ros LV, Belchi-Navarro S, Bru R, Ros Barceló A, Pedreño MA. Class III peroxidases in plant defence reactions. JOURNAL OF EXPERIMENTAL BOTANY 2009; 60:377-90. [PMID: 19073963 DOI: 10.1093/jxb/ern277] [Citation(s) in RCA: 423] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
When plants are attacked by pathogens, they defend themselves with an arsenal of defence mechanisms, both passive and active. The active defence responses, which require de novo protein synthesis, are regulated through a complex and interconnected network of signalling pathways that mainly involve three molecules, salicylic acid (SA), jasmonic acid (JA), and ethylene (ET), and which results in the synthesis of pathogenesis-related (PR) proteins. Microbe or elicitor-induced signal transduction pathways lead to (i) the reinforcement of cell walls and lignification, (ii) the production of antimicrobial metabolites (phytoalexins), and (iii) the production of reactive oxygen species (ROS) and reactive nitrogen species (RNS). Among the proteins induced during the host plant defence, class III plant peroxidases (EC 1.11.1.7; hydrogen donor: H(2)O(2) oxidoreductase, Prxs) are well known. They belong to a large multigene family, and participate in a broad range of physiological processes, such as lignin and suberin formation, cross-linking of cell wall components, and synthesis of phytoalexins, or participate in the metabolism of ROS and RNS, both switching on the hypersensitive response (HR), a form of programmed host cell death at the infection site associated with limited pathogen development. The present review focuses on these plant defence reactions in which Prxs are directly or indirectly involved, and ends with the signalling pathways, which regulate Prx gene expression during plant defence. How they are integrated within the complex network of defence responses of any host plant cell will be the cornerstone of future research.
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Affiliation(s)
- L Almagro
- Department of Plant Biology, Faculty of Biology, University of Murcia, Campus de Espinardo, E-30100 Murcia, Spain
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Marmey P, Jalloul A, Alhamdia M, Assigbetse K, Cacas JL, Voloudakis AE, Champion A, Clerivet A, Montillet JL, Nicole M. The 9-lipoxygenase GhLOX1 gene is associated with the hypersensitive reaction of cotton Gossypium hirsutum to Xanthomonas campestris pv malvacearum. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2007; 45:596-606. [PMID: 17611116 DOI: 10.1016/j.plaphy.2007.05.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2007] [Accepted: 05/14/2007] [Indexed: 05/16/2023]
Abstract
Hypersensitive reaction (HR) cell death of cotton to the incompatible race 18 from Xanthomonas campestris pathovar malvacearum (Xcm) is associated with 9S-lipoxygenase activity (LOX) responsible for lipid peroxidation. Here, we report the cloning of cotton (Gossypium hirsutum L.) LOX gene (GhLOX1) and the sequencing of its promoter. GhLOX1 was found to be highly expressed during Xcm induced HR. Sequence analysis showed that GhLOX1 is a putative 9-LOX, and GhLOX1 promoter contains SA and JA responsive elements. Investigation on LOX signalisation on cotyledons infiltrated with salicylic acid (SA), or incubated with methyl-jasmonate (MeJA) revealed that both treatments induced LOX activity and GhLOX1 gene expression. HR-like symptoms were observed when LOX substrates were then injected in treated (MeJA and SA) cotyledons or when Xcm compatible race 20 was inoculated on MeJA treated cotyledons. Together these results support the fact that GhLOX1 encodes a 9 LOX whose activity would be involved in cell death during cotton HR.
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Affiliation(s)
- Philippe Marmey
- IRD, UMR RPB Résistance des Plantes aux Bioagresseurs, 911 Avenue Agropolis, B.P. 64501, 34394 Montpellier cedex 5, France
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20
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Chaerle L, Lenk S, Hagenbeek D, Buschmann C, Van Der Straeten D. Multicolor fluorescence imaging for early detection of the hypersensitive reaction to tobacco mosaic virus. JOURNAL OF PLANT PHYSIOLOGY 2007; 164:253-62. [PMID: 16545491 DOI: 10.1016/j.jplph.2006.01.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2005] [Accepted: 01/10/2006] [Indexed: 05/07/2023]
Abstract
The physiological status of plants can nowadays be promptly monitored with non-invasive methods. This opens the possibility to continuously follow-up plant performance and permits to detect stress-induced deviations presymptomatically. Upon stress, plants may synthesize specific compounds, depending on the causal agent. Such compounds may alter the absorption of the light impinging on plant leaves, hence the spectrum of reflected, re-emitted, and transmitted light changes. UV-excited fluorescence imaging specifically allows visualization of the accumulation of phenolic compounds, e.g. those associated with the hypersensitive response to pathogens. By using imaging at regular intervals (time-lapse series) of tobacco mosaic virus (TMV) infection in resistant tobacco we aimed at the description and quantification of the kinetics of blue-green fluorescence compared to the visual development of the disease. Presymptomatic responses to TMV infection were observed with a multicolor fluorescence and reflectance imaging setup. The onset of increases in blue-green and chlorophyll fluorescence were comparable in timing, although further symptom development was strikingly different. Compounds known to accumulate during the hypersensitive response and displaying blue-green fluorescence revealed different dynamics of fluorescence evolution in time. The multichannel imaging system permitted to discern the key components salicylic acid and scopoletin. In contrast, for the compatible interaction between TMV and non-resistant tobacco, no presymptomatic responses were detected on inoculated leaves. This work proves the potential of multispectral imaging to unveil stress-associated signatures, and the power of blue-green fluorescence imaging to monitor accumulation of secondary compounds.
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Affiliation(s)
- Laury Chaerle
- Unit Plant Hormone Signalling and Bio-imaging, Ghent University, Ledeganckstraat 35, B-9000 Gent, Belgium
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GHOSH MODHUMITA. Antifungal properties of haem peroxidase from Acorus calamus. ANNALS OF BOTANY 2006; 98:1145-53. [PMID: 17056613 PMCID: PMC2803583 DOI: 10.1093/aob/mcl205] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
BACKGROUND AND AIMS Plants have evolved a number of inducible defence mechanisms against pathogen attack, including synthesis of pathogenesis-related proteins. The aim of the study was to purify and characterize antifungal protein from leaves of Acorus calamus. METHODS Leaf proteins from A. calamus were fractionated by cation exchange chromatography and gel filtration and the fraction inhibiting the hyphal extension of phytopathogens was characterized. The temperature stability and pH optima of the protein were determined and its presence was localized in the leaf tissues. KEY RESULTS The purified protein was identified as a class III haem peroxidase with a molecular weight of approx. 32 kDa and pI of 7.93. The temperature stability of the enzyme was observed from 5 degrees C to 60 degrees C with a temperature optimum of 36 degrees C. Maximum enzyme activity was registered at pH 5.5. The pH and temperature optima were corroborated with the antifungal activity of the enzyme. The enzyme was localized in the leaf epidermal cells and lumen tissues of xylem, characteristic of class III peroxidases. The toxic nature of the enzyme which inhibited hyphal growth was demonstrated against phytopathogens such as Macrophomina phaseolina, Fusarium moniliforme and Trichosporium vesiculosum. Microscopic observations revealed distortion in the hyphal structure with stunted growth, increased volume and extensive hyphal branching. CONCLUSIONS This study indicates that peroxidases may have a role to play in host defence by inhibiting the hyphal extension of invading pathogens.
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Djonović S, Pozo MJ, Dangott LJ, Howell CR, Kenerley CM. Sm1, a proteinaceous elicitor secreted by the biocontrol fungus Trichoderma virens induces plant defense responses and systemic resistance. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2006; 19:838-53. [PMID: 16903350 DOI: 10.1094/mpmi-19-0838] [Citation(s) in RCA: 181] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The soilborne filamentous fungus Trichoderma virens is a biocontrol agent with a well-known ability to produce antibiotics, parasitize pathogenic fungi, and induce systemic resistance in plants. Even though a plant-mediated response has been confirmed as a component of bioprotection by Trichoderma spp., the molecular mechanisms involved remain largely unknown. Here, we report the identification, purification, and characterization of an elicitor secreted by T. virens, a small protein designated Sm1 (small protein 1). Sm1 lacks toxic activity against plants and microbes. Instead, native, purified Sm1 triggers production of reactive oxygen species in monocot and dicot seedlings, rice, and cotton, and induces the expression of defense-related genes both locally and systemically in cotton. Gene expression analysis revealed that SM1 is expressed throughout fungal development under different nutrient conditions and in the presence of a host plant. Using an axenic hydroponic system, we show that SM1 expression and secretion of the protein is significantly higher in the presence of the plant. Pretreatment of cotton cotyledons with Sm1 provided high levels of protection to the foliar pathogen Colletotrichum sp. These results indicate that Sm1 is involved in the induction of resistance by Trichoderma spp. through the activation of plant defense mechanisms.
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Affiliation(s)
- Slavica Djonović
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843, USA
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Bellés JM, Garro R, Pallás V, Fayos J, Rodrigo I, Conejero V. Accumulation of gentisic acid as associated with systemic infections but not with the hypersensitive response in plant-pathogen interactions. PLANTA 2006; 223:500-11. [PMID: 16331468 DOI: 10.1007/s00425-005-0109-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2005] [Accepted: 04/26/2005] [Indexed: 05/05/2023]
Abstract
In the present work we have studied the accumulation of gentisic acid (2,5-dihydroxybenzoic acid, a metabolic derivative of salicylic acid, SA) in the plant-pathogen systems, Cucumis sativus and Gynura aurantiaca, infected with either prunus necrotic ringspot virus (PNRSV) or the exocortis viroid (CEVd), respectively. Both pathogens produced systemic infections and accumulated large amounts of the intermediary signal molecule gentisic acid as ascertained by electrospray ionization mass spectrometry (ESI-MS) coupled on line with high performance liquid chromatography (HPLC). The compound was found mostly in a conjugated (beta-glucoside) form. Gentisic acid has also been found to accumulate (although at lower levels) in cucumber inoculated with low doses of Pseudomonas syringae pv. tomato, producing a nonnecrotic reaction. In contrast, when cucumber was inoculated with high doses of this pathogen, a hypersensitive reaction occurred, but no gentisic-acid signal was induced. This is consistent with our results supporting the idea that gentisic-acid signaling may be restricted to nonnecrotizing reactions of the host plant (Bellés et al. in Mol Plant-Microbe Interact 12:227-235, 1999). In cucumber and Gynura plants, the activity of gentisic acid as inducing signal was different to that of SA, thus confirming the data found for tomato. Exogenously supplied gentisic acid was able to induce peroxidase activity in both Gynura and cucumber plants in a similar way as SA or pathogens. However, gentisic-acid treatments strongly induced polyphenol oxidase activity in cucumber, whereas pathogen infection or SA treatment resulted in a lower induction of this enzyme. Nevertheless, gentisic acid did not induce other defensive proteins which are induced by SA in these plants. This indicates that gentisic acid could act as an additional signal to SA for the activation of plant defenses in cucumber and Gynura plants.
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Affiliation(s)
- José M Bellés
- Instituto de Biología Molecular y Celular de Plantas, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Camino de Vera s/n, 46022 Valencia, Spain
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A phytoremediation study: Selection of tropical and other vascular plants for decolorization of Poly R-478 dye. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/rem.20104] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ahn IP, Kim S, Lee YH. Vitamin B1 functions as an activator of plant disease resistance. PLANT PHYSIOLOGY 2005; 138:1505-15. [PMID: 15980201 PMCID: PMC1176421 DOI: 10.1104/pp.104.058693] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2004] [Revised: 03/28/2005] [Accepted: 04/04/2005] [Indexed: 05/03/2023]
Abstract
Vitamin B(1) (thiamine) is an essential nutrient for humans. Vitamin B(1) deficiency causes beriberi, which disturbs the central nervous and circulatory systems. In countries in which rice (Oryza sativa) is a major food, thiamine deficiency is prevalent because polishing of rice removes most of the thiamine in the grain. We demonstrate here that thiamine, in addition to its nutritional value, induces systemic acquired resistance (SAR) in plants. Thiamine-treated rice, Arabidopsis (Arabidopsis thaliana), and vegetable crop plants showed resistance to fungal, bacterial, and viral infections. Thiamine treatment induces the transient expression of pathogenesis-related (PR) genes in rice and other plants. In addition, thiamine treatment potentiates stronger and more rapid PR gene expression and the up-regulation of protein kinase C activity. The effects of thiamine on disease resistance and defense-related gene expression mobilize systemically throughout the plant and last for more than 15 d after treatment. Treatment of Arabidopsis ecotype Columbia-0 plants with thiamine resulted in the activation of PR-1 but not PDF1.2. Furthermore, thiamine prevented bacterial infection in Arabidopsis mutants insensitive to jasmonic acid or ethylene but not in mutants impaired in the SAR transduction pathway. These results clearly demonstrate that thiamine induces SAR in plants through the salicylic acid and Ca(2+)-related signaling pathways. The findings provide a novel paradigm for developing alternative strategies for the control of plant diseases.
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Affiliation(s)
- Il-Pyung Ahn
- School of Agricultural Biotechnology and Center for Agricultural Biomaterials, Seoul National University, Seoul 151-742, Korea
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Delannoy E, Lyon BR, Marmey P, Jalloul A, Daniel JF, Montillet JL, Essenberg M, Nicole M. Resistance of cotton towards Xanthomonas campestris pv. malvacearum. ANNUAL REVIEW OF PHYTOPATHOLOGY 2005; 43:63-82. [PMID: 16078877 DOI: 10.1146/annurev.phyto.43.040204.140251] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Interactions between Gossypium spp. and the bacterial pathogen Xanthomonas campestris pv. malvacearum are understood in the context of the gene-for-gene concept. Reviewed here are the genetic basis for cotton resistance, with reference to resistance genes, resistance gene analogs, and bacterial avirulence genes, together with the physiological mechanisms involved in the hypersensitive response to the pathogen, including production of signaling hormones, synthesis of antimicrobial molecules and alteration of host cell structures. This host-pathogen interaction represents the most complex resistance gene/avr gene system yet known and is one of the few in which phytoalexins are known to be specifically localized in HR cells at anti-microbial concentrations.
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Affiliation(s)
- E Delannoy
- IRD, UMR DGPC, Résistance des Plantes, B.P. 64501, 34394 Montpellier cédex 5, France.
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Musetti R, di Toppi LS, Ermacora P, Favali MA. Recovery in apple trees infected with the apple proliferation phytoplasma: an ultrastructural and biochemical study. PHYTOPATHOLOGY 2004; 94:203-8. [PMID: 18943544 DOI: 10.1094/phyto.2004.94.2.203] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
ABSTRACT Localization of hydrogen peroxide (H(2)O(2)) and the roles of peroxidases, malondialdehyde, and reduced glutathione in three apple cultivars were compared in healthy trees, trees infected with apple proliferation phytoplasma (APP), and trees that had recovered from the infection. In recovered apple trees, symptoms of the disease and the pathogen had disappeared from the canopy, but phytoplasmas remained in the roots. H(2)O(2) was detected cytochemically by its reaction with cerium chloride to produce electron-dense deposits of cerium perhydroxides.H(2)O(2) occurred in the plasmalemma of the phloem of leaves of recovered apple trees, but not in healthy or APP-infected leaves. In all cultivars, the peroxidase activity detected in tissue from APP-diseased trees was greater than or equal to that of tissue from recovered trees, which equaled or exceeded that of tissue from healthy trees, at two sampling times (May and September). In contrast, the glutathione content of leaves decreased in the reverse order. More malondialdehyde was observed in leaves from recovered trees than in leaves from healthy or APP-infected trees in three of six cultivar-date combinations; in the other three combinations, the malondialdehyde contents of leaves from healthy, infected, and recovered trees were not significantly different from one another. The results suggest that some components of the oxidant-scavenging system in recovered leaves are not very active, leading to an overproduction of H(2)O(2) and, possibly, to a membrane lipid peroxidation.The production of H(2)O(2) appears to be involved in counteracting pathogen virulence.
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Bargabus RL, Zidack NK, Sherwood JE, Jacobsen BJ. Oxidative burst elicited by Bacillus mycoides isolate Bac J, a biological control agent, occurs independently of hypersensitive cell death in sugar beet. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2003; 16:1145-53. [PMID: 14651348 DOI: 10.1094/mpmi.2003.16.12.1145] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Response of sugar beet cultivars C40 and USH11 to syringe infiltration of live and dead Bacillus mycoides isolate Bac J, a biological control agent, and virulent and avirulent isolates of Erwinia carotovora pv. betavasculorum was measured by monitoring systemic acquired resistance control of Cercospora beticola, specific activity of chitinase and beta-glucanase, the oxidative burst, and hypersensitive cell death at the infiltration site. Priming sugar beet with B. mycoides Bac J (1 x 10(8) cells/ml) and avirulent isolates of E. carotovora pv. betavasculorum (1 x 10(6) cells/ml) reduced C. beticola symptoms by nearly 70% on distal, untreated leaves. Systemic resistance responses elicited by live B. mycoides Bac J and avirulent E. carotovora pv. betavasculorum isolates, measured by assays for chitinase and beta-glucanase, were statistically equivalent, and biphasic hydrogen peroxide production was observed. Although similar in timing, the second hydrogen peroxide burst was twofold lower for B. mycoides Bac J than for avirulent E. carotovora pv. betavasculorum. Hypersensitive cell death was elicited by avirulent E. carotovora pv. betavasculorum but not B. mycoides Bac J. An oxidative burst was elicited by spray-applied B. mycoides Bac J under both light and green light conditions, indicating that the signal produced by B. mycoides Bac J was not reliant on the stomata for entry into sugar beet. A working model for signal delivery and systemic resistance induction by B. mycoides Bac J in sugar beet is proposed.
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Affiliation(s)
- Rebecca L Bargabus
- Department of Plant Science and Plant Pathology, Montana State University, 119 AgBioSciences Facility, Bozeman 59717-3150, USA
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Delannoy E, Jalloul LA, Assigbetsé K, Marmey P, Geiger JP, Lherminier J, Daniel JF, Martinez C, Nicole M. Activity of class III peroxidases in the defense of cotton to bacterial blight. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2003; 16:1030-8. [PMID: 14601671 DOI: 10.1094/mpmi.2003.16.11.1030] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Cotton cotyledons displayed a hypersensitive reaction (HR) in the cultivar Réba B50 after infiltration with the avirulent race 18 from Xanthomonas campestris pv. malvacearum. Two sets of peroxidases were associated with the HR time course. Early but transient accumulation of peroxidase in material encapsulating the bacteria in intercellular areas was observed by immunocytochemistry at 3 h postinfection and coincided with the oxidative burst. Total guaiacol-peroxidase activity was highly increased in cells undergoing HR, from 12 h after treatment. Molecular characterization of seven cloned peroxidase genes revealed highly conserved B, D, and F domains, with similarities to plant class III peroxidases. Analysis of gene expression showed variation in transcript accumulation during both compatible (race 20) and incompatible interactions for four of these genes: pod2, pod3, pod4, and pod6. Pod4 and pod6 were more intensely up-regulated during resistance than during disease and in the control, while pod3 was specifically down-regulated during the HR after the oxidative burst. Pod2 was induced by pathogen infection and weakly stimulated in the control. These data suggest that cotton peroxidases may have various functions in the defense response to Xanthomonas infections.
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Affiliation(s)
- E Delannoy
- IRD, UMR (DGPC), "Résistance des Plantes", BP 64501, 34394 Montpellier, France
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Resende MLV, Salgado SML, Chaves ZM. Espécies ativas de oxigênio na resposta de defesa de plantas a patógenos. ACTA ACUST UNITED AC 2003. [DOI: 10.1590/s0100-41582003000200001] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A explosão oxidativa é uma resposta de defesa da planta após o reconhecimento do patógeno, conduzindo à reação de hipersensibilidade (HR). Esta resposta é devido à geração de espécies ativas de oxigênio (ROS ou EAO's), tais como H2O2, O2-, e OH- As espécies ativas de oxigênio possuem várias funções na resposta de defesa da planta. Peróxido de higrogênio (H2O2) pode ser diretamente tóxico ao patógeno e está envolvido com o fortalecimento da parede celular, uma vez que o H2O2 é necessário para a biossíntese de lignina. Peróxido de hidrogênioatua também como mensageiro secundário, sendo responsável pela ativação da hidrolase do ácido benzóico, enzima responsável pela conversão do ácido benzóico em ácido salicílico. A explosão oxidativa não está confinada somente à HR macroscópica, uma vez que explosões oxidativas secundárias poderão ocorrer nos tecidos distantes, causando micro-HR's e conduzindo à resistência sistêmica adquirida (SAR), a qual é mediada pelo ácido salicílico como um sinal. Portanto, a ocorrência de HR e SAR é dependente da cascata de sinalização derivada da explosão oxidativa, que por sua vez é um evento inicial na resposta da planta contra a invasão do patógeno.
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Do HM, Hong JK, Jung HW, Kim SH, Ham JH, Hwang BK. Expression of peroxidase-like genes, H2O2 production, and peroxidase activity during the hypersensitive response to Xanthomonas campestris pv. vesicatoria in Capsicum annuum. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2003; 16:196-205. [PMID: 12650451 DOI: 10.1094/mpmi.2003.16.3.196] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Pepper ascorbate peroxidase-like (CAPOA1), thioredoxin peroxidase-like (CAPOT1), and peroxidase-like (CAPO1) clones were isolated from pepper leaves inoculated with avirulent strain Bv5-4a of Xanthomonas campestris pv. vesicatoria. CAPOA1, CAPOT1, and CAPO1 mRNA disappeared 18 to 30 h after the bacterial infection when the hypersensitive response (HR) was visible. In contrast, peroxidase activity reached a peak at 18 h after infection and then declined at 24 and 30 h when H2O2 accumulation level was maximal. These results suggest that the striking accumulation of H2O2 and strong decrease in peroxidase activity during the programmed cell death may be due to the strong suppression of CAPOA1, CAPOT1, and CAPO1 gene expression. Infection by Phytophthora capsici or Colletotricum gloeosporioides also induced the expression of the three putative peroxidase genes in pepper tissues. CAPOA1 mRNAs were in situ localized in phloem areas of vascular bundles in pepper tissues infected by Colletotricum. coccodes, P. capsici, or C. gloeosporioides. Exogenous treatment with H2O2 strongly induced the CAPOA1 and CAPOT1 transcription 1 h after treatment, while the CAPO1 transcripts accumulated 12 h after H2O2 treatment. We suggest that pepper ascorbate peroxidase and thioredoxin peroxidase genes may function as regulators of H2O2 level and total peroxidase activity in the oxidative burst during the HR to incompatible pathogen interaction in pepper plant.
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Affiliation(s)
- Hyun Mee Do
- Laboratory of Molecular Plant Pathology, College of Life and Environmental Sciences, Korea University, Seoul 136-701, Korea
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Ollerstam O, Larsson S. Salicylic acid mediates resistance in the willow Salix viminalis against the gall midge Dasineura marginemtorquens. J Chem Ecol 2003; 29:163-74. [PMID: 12647860 DOI: 10.1023/a:1021936832258] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Resistant willow (Salix viminalis L.) genotypes react with a rapid hypersensitive response (HR) when attacked by the gall midge Dasineura marginemtorquens Bremi. In general, infected plant genotypes or species that react hypersensitively to pathogens accumulate salicylic acid (SA) locally and systemically. Thus, pathogen-induced HRs are strongly associated with accumulation of SA. In this study, we tested the hypothesis that SA mediates resistance in S. viminalis against D. marginemtorquens. By means of HPLC, we found accumulation of SA in a resistant S. viminalis genotype, but not in a susceptible genotype one to two days after D. marginemtorquens egg hatch. To test whether this correlation between accumulation of SA and resistance is causal, we treated a normally susceptible S. viminalis genotype exogenously with SA and found a decreased larval survival frequency on treated shoots. Thus, the hypothesis that SA mediates resistance in the S. viminalis/D. marginemtorquens system was strongly supported. Interestingly, great similarity seems to exist between the biochemical signaling associated with pathogen-induced HRs and this gall-inducer induced HR.
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Affiliation(s)
- Olof Ollerstam
- Department of Entomology, Swedish University of Agricultural Sciences, PO Box 7044, SE 750 07 Uppsala, Sweden
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Jalloul A, Montillet JL, Assigbetsé K, Agnel JP, Delannoy E, Triantaphylidès C, Daniel JF, Marmey P, Geiger JP, Nicole M. Lipid peroxidation in cotton: Xanthomonas interactions and the role of lipoxygenases during the hypersensitive reaction. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2002; 32:1-12. [PMID: 12366796 DOI: 10.1046/j.1365-313x.2002.01393.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Lipid peroxidation, often associated with hypersensitive cell death, may be initiated either by active oxygen species (AOS) or lipoxygenases (LOX). Here we report a detailed analysis of this oxidative process in both incompatible and compatible interactions between the cotton cultivar Reba B50 and Xanthomonas campestris pv. malvacearum (Xcm). The hypersensitive reaction (HR) was characterized by a massive production of polyunsaturated fatty acid (PUFA) hydroperoxides together with typical tissue dehydration. Among these, isomers peroxidized on carbon 9, largely predominant, were chiral, showing an excess in the S enantiomer. The HR process was accompanied by an increase in 9S-LOX activity and preceded by transcription of a LOX gene (GhKLox1). These results showed that: (i) AOS produced during the oxidative burst were not involved in PUFA peroxidation during HR; and (ii) as previously described in elicited leaves of tobacco, the massive enzymatic lipid peroxidation was closely associated with hypersensitive cell death. During disease development in this cotton cultivar, the 9-lipoxygenation of PUFAs was late, weak, preceded by a faint accumulation of GhKLox1 transcripts, and associated with chlorosis but not with necrosis. Consequently, the main difference between incompatible and compatible interactions was in the precocity and intensity of the oxidative process, rather than in its nature. These data provide the evidence for a correlation between lipid peroxidation and hypersensitive cell death induced by pathogens.
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Affiliation(s)
- A Jalloul
- IRD-UMR DGPC (Diversité et Génome des Plantes Cultivées; AGRO-M, CIRAD, INRA, IRD), BP 5045, 34032 Montpellier, France
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Hilaire E, Young SA, Willard LH, McGee JD, Sweat T, Chittoor JM, Guikema JA, Leach JE. Vascular defense responses in rice: peroxidase accumulation in xylem parenchyma cells and xylem wall thickening. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2001; 14:1411-1419. [PMID: 11768536 DOI: 10.1094/mpmi.2001.14.12.1411] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The rice bacterial blight pathogen Xanthomonas oryzae pv. oryzae is a vascular pathogen that elicits a defensive response through interaction with metabolically active rice cells. In leaves of 12-day-old rice seedlings, the exposed pit membrane separating the xylem lumen from the associated parenchyma cells allows contact with bacterial cells. During resistant responses, the xylem secondary walls thicken within 48 h and the pit diameter decreases, effectively reducing the area of pit membrane exposed for access by bacteria. In susceptible interactions and mock-inoculated controls, the xylem walls do not thicken within 48 h. Xylem secondary wall thickening is developmental and, in untreated 65-day-old rice plants, the size of the pit also is reduced. Activity and accumulation of a secreted cationic peroxidase, PO-C1, were previously shown to increase in xylem vessel walls and lumen. Peptide-specific antibodies and immunogold-labeling were used to demonstrate that PO-C1 is produced in the xylem parenchyma and secreted to the xylem lumen and walls. The timing of the accumulation is consistent with vessel secondary wall thickening. The PO-C1 gene is distinct but shares a high level of similarity with previously cloned pathogen-induced peroxidases in rice. PO-C1 gene expression was induced as early as 12 h during resistant interactions and peaked between 18 and 24 h after inoculation. Expression during susceptible interactions was lower than that observed in resistant interactions and was undetectable after infiltration with water, after mechanical wounding, or in mature leaves. These data are consistent with a role for vessel secondary wall thickening and peroxidase PO-C1 accumulation in the defense response in rice to X. oryzae pv. oryzae.
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Affiliation(s)
- E Hilaire
- Department of Plant Pathology, Throckmorton Plant Sciences Center, Kansas State University, Manhattan 66506-5502, USA
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Rustérucci C, Aviv DH, Holt BF, Dangl JL, Parker JE. The disease resistance signaling components EDS1 and PAD4 are essential regulators of the cell death pathway controlled by LSD1 in Arabidopsis. THE PLANT CELL 2001. [PMID: 11595797 DOI: 10.1105/tpc.13.10.2211] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Specific recognition of pathogens is mediated by plant disease resistance (R) genes and translated into a successful defense response. The extent of associated hypersensitive cell death varies from none to an area encompassing cells surrounding an infection site, depending on the R gene activated. We constructed double mutants in Arabidopsis between positive regulators of R function and a negative regulator of cell death, LSD1, to address whether genes required for normal R function also regulate the runaway cell death observed in lsd1 mutants. We report here that EDS1 and PAD4, two signaling genes that mediate some but not all R responses, also are required for runaway cell death in the lsd1 mutant. Importantly, this novel function of EDS1 and PAD4 is operative when runaway cell death in lsd1 is initiated through an R gene that does not require EDS1 or PAD4 for disease resistance. NDR1, another component of R signaling, also contributes to the control of plant cell death. The roles of EDS1 and PAD4 in regulating lsd1 runaway cell death are related to the interpretation of reactive oxygen intermediate-derived signals at infection sites. We further demonstrate that the fate of superoxide at infection sites is different from that observed at the leading margins of runaway cell death lesions in lsd1 mutants.
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Affiliation(s)
- C Rustérucci
- Sainsbury Laboratory, John Innes Centre, Colney, Norwich NR4 7UH, United Kingdom
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Rustérucci C, Aviv DH, Holt BF, Dangl JL, Parker JE. The disease resistance signaling components EDS1 and PAD4 are essential regulators of the cell death pathway controlled by LSD1 in Arabidopsis. THE PLANT CELL 2001; 13:2211-24. [PMID: 11595797 PMCID: PMC139154 DOI: 10.1105/tpc.010085] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Specific recognition of pathogens is mediated by plant disease resistance (R) genes and translated into a successful defense response. The extent of associated hypersensitive cell death varies from none to an area encompassing cells surrounding an infection site, depending on the R gene activated. We constructed double mutants in Arabidopsis between positive regulators of R function and a negative regulator of cell death, LSD1, to address whether genes required for normal R function also regulate the runaway cell death observed in lsd1 mutants. We report here that EDS1 and PAD4, two signaling genes that mediate some but not all R responses, also are required for runaway cell death in the lsd1 mutant. Importantly, this novel function of EDS1 and PAD4 is operative when runaway cell death in lsd1 is initiated through an R gene that does not require EDS1 or PAD4 for disease resistance. NDR1, another component of R signaling, also contributes to the control of plant cell death. The roles of EDS1 and PAD4 in regulating lsd1 runaway cell death are related to the interpretation of reactive oxygen intermediate-derived signals at infection sites. We further demonstrate that the fate of superoxide at infection sites is different from that observed at the leading margins of runaway cell death lesions in lsd1 mutants.
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Affiliation(s)
- C Rustérucci
- Sainsbury Laboratory, John Innes Centre, Colney, Norwich NR4 7UH, United Kingdom
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37
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Rustérucci C, Aviv DH, Holt BF, Dangl JL, Parker JE. The disease resistance signaling components EDS1 and PAD4 are essential regulators of the cell death pathway controlled by LSD1 in Arabidopsis. THE PLANT CELL 2001; 13:2211-2224. [PMID: 11595797 DOI: 10.2307/3871503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Specific recognition of pathogens is mediated by plant disease resistance (R) genes and translated into a successful defense response. The extent of associated hypersensitive cell death varies from none to an area encompassing cells surrounding an infection site, depending on the R gene activated. We constructed double mutants in Arabidopsis between positive regulators of R function and a negative regulator of cell death, LSD1, to address whether genes required for normal R function also regulate the runaway cell death observed in lsd1 mutants. We report here that EDS1 and PAD4, two signaling genes that mediate some but not all R responses, also are required for runaway cell death in the lsd1 mutant. Importantly, this novel function of EDS1 and PAD4 is operative when runaway cell death in lsd1 is initiated through an R gene that does not require EDS1 or PAD4 for disease resistance. NDR1, another component of R signaling, also contributes to the control of plant cell death. The roles of EDS1 and PAD4 in regulating lsd1 runaway cell death are related to the interpretation of reactive oxygen intermediate-derived signals at infection sites. We further demonstrate that the fate of superoxide at infection sites is different from that observed at the leading margins of runaway cell death lesions in lsd1 mutants.
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Affiliation(s)
- C Rustérucci
- Sainsbury Laboratory, John Innes Centre, Colney, Norwich NR4 7UH, United Kingdom
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Martinez C, Blanc F, Le Claire E, Besnard O, Nicole M, Baccou JC. Salicylic acid and ethylene pathways are differentially activated in melon cotyledons by active or heat-denatured cellulase from Trichoderma longibrachiatum. PLANT PHYSIOLOGY 2001; 127:334-44. [PMID: 11553761 PMCID: PMC117989 DOI: 10.1104/pp.127.1.334] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2001] [Revised: 03/21/2001] [Accepted: 06/07/2001] [Indexed: 05/18/2023]
Abstract
Infiltration of cellulase (EC 3.2.1.4) from Trichoderma longibrachiatum into melon (Cucumis melo) cotyledons induced several key defense mechanisms and hypersensitive reaction-like symptoms. An oxidative burst was observed 3 hours after treatment and was followed by activation of ethylene and salicylic acid (SA) signaling pathways leading to marked induction of peroxidase and chitinase activities. The treatment of cotyledons by heat-denatured cellulase also led to some induction of peroxidase and chitinase activities, but the oxidative burst and SA production were not observed. Co-infiltration of aminoethoxyvinil-glycine (an ethylene inhibitor) with the active cellulase did not affect the high increase of peroxidase and chitinase activities. In contrast, co-infiltration of aminoethoxyvinil-glycine with the denatured enzyme blocked peroxidase and chitinase activities. Our data suggest that the SA pathway (induced by the cellulase activity) and ethylene pathway (induced by heat-denatured and active protein) together coordinate the activation of defense mechanisms. We found a partial interaction between both signaling pathways since SA caused an inhibition of the ethylene production and a decrease in peroxidase activity when co-infiltrated with denatured cellulase. Treatments with active or denatured cellulase caused a reduction in powdery mildew (Sphaerotheca fuliginea) disease.
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Affiliation(s)
- C Martinez
- Université Montpellier II, Laboratoire Génie Biologique et Sciences des Aliments, Groupe Physiologie et Technologie des Végétaux, Case Courrier No. 024, Place Eugène Bataillon, 34095 Montpellier cedex 05, France.
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Arimura G, Tashiro K, Kuhara S, Nishioka T, Ozawa R, Takabayashi J. Gene responses in bean leaves induced by herbivory and by herbivore-induced volatiles. Biochem Biophys Res Commun 2000; 277:305-10. [PMID: 11032722 DOI: 10.1006/bbrc.2000.3672] [Citation(s) in RCA: 114] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Plant-plant interactions via herbivory-induced leaf volatiles could result in the induction of defense responses against aggressive biotic agents in plants. In this study, cDNA microarray technology showed comprehensive gene activation in lima bean leaves that were exposed to volatiles released from the neighboring leaves infested with spider mites. The infestation with spider mites and the herbivory-induced volatiles enhanced 97 and 227 gene spots on the microarray tip printed with 2032 lima bean cDNA, respectively. These genes are related to such broad functions as responses to pathogenesis, wounding, hormones, ethylene biosynthesis, flavonoid biosynthesis, (post) transcriptional modifications, translations, chaperones, secondary signaling messengers, membrane transports, protein/peptide degradations, and photosynthesis. We therefore conclude that herbivorous damage and herbivory-induced volatiles elicit comprehensive and drastic changes of metabolisms in leaves.
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Affiliation(s)
- G Arimura
- Bio-oriented Technology Research Advancement Institution, Tokyo, 105-0001, Japan
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