DOCSLIB.ORG

Investigating the Roles of Diterpenoids in Rice-Xanthomonas Oryzae Interactions" (2015)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Investigating the Roles of Diterpenoids in Rice-Xanthomonas Oryzae Interactions Iowa State University Capstones, Theses and Graduate Theses and Dissertations Dissertations 2015 Investigating the roles of diterpenoids in rice- Xanthomonas oryzae interactions Xuan Lu Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/etd Part of the Agriculture Commons, and the Plant Sciences Commons Recommended Citation Lu, Xuan, "Investigating the roles of diterpenoids in rice-Xanthomonas oryzae interactions" (2015). Graduate Theses and Dissertations. 14912. https://lib.dr.iastate.edu/etd/14912 This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Graduate Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. Investigating the roles of diterpenoids in rice-Xanthomonas oryzae interactions by Xuan Lu A dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Major: Plant Biology Program of Study Committee: Reuben J. Peters, Major Professor Gwyn Beattie Gustavo MacIntosh Alan Myers Bing Yang Iowa State University Ames, Iowa 2015 Copyright © Xuan Lu, 2015. All rights reserved. ii TABLE OF CONTENTS Page ABSTRACT ............................................................................................................... iv CHAPTER 1 GENERAL INTRODUCTION ....................................................... 1 Rice–Xanthomonas oryzae Interactions ............................................................ 1 Ecological Function of Secondary Metabolites ............................................. 2 Terpenoids ......................................................................................................... 2 Gibberellin ..................................................................................................... 4 Rice Phytoalexins .............................................................................................. 5 Organization of Dissertation and Author Contribution .................................. 7 References ......................................................................................................... 8 Figures ......................................................................................................... 12 CHAPTER 2 AN ENT-KAURENE DERIVED DITERPENOID VIRULENCE FACTOR FROM XANTHOMONAS ORYZAE PV. ORYZICOLA ..... 15 Abstract ......................................................................................................... 15 Introduction .................................................................................................... 16 Results ......................................................................................................... 18 Discussion ......................................................................................................... 24 Materials and Methods ........................................................................................ 26 Acknowledgements .............................................................................................. 32 References ......................................................................................................... 32 Figures ......................................................................................................... 35 Supplementary Results ......................................................................................... 39 Supplementary Table ........................................................................................... 41 CHAPTER 3 FUNCTIONAL CONSERVATION OF THE CAPACITY FOR ENT-KAURENE BIOSYNTHESIS AND AN ASSOCIATED OPERON IN CERTAIN RHIZOBIA .............................................................................................. 42 Abstract ......................................................................................................... 42 Introduction .................................................................................................... 43 Results ......................................................................................................... 45 Discussion ......................................................................................................... 52 Materials and Methods ........................................................................................ 53 Acknowledgements .............................................................................................. 57 References ......................................................................................................... 58 Table ........................................................................................................ 62 Figures ......................................................................................................... 62 iii CHAPTER 4 PHYSIOLOGICAL FUNCTION AND METABOLITES LEVEL OF DITERPENOIDS IN RICE DEFENSE ............................................................... 65 Abstract ......................................................................................................... 65 Introduction .................................................................................................... 66 Results ......................................................................................................... 70 Discussion ......................................................................................................... 79 Materials and Methods ......................................................................................... 80 References ......................................................................................................... 85 Figures ......................................................................................................... 89 Supplemental Results ........................................................................................... 96 CHAPTER 5 INVESTIGATING THE BIOLOGICAL FUNCTION OF PHYTOCASSANES IN RICE DEFENSE ................................................................ 99 Abstract ......................................................................................................... 99 Introduction .................................................................................................... 99 Results ......................................................................................................... 101 Discussion ......................................................................................................... 103 Materials and Methods ......................................................................................... 104 Acknowledgements .............................................................................................. 106 References ......................................................................................................... 106 Figures ......................................................................................................... 107 CHAPTER 6 EXPLORATION OF ORYZALIDE-RELATED DITERPENOIDS IN RICE DEFENSE WITH GENOME EDITING TECHNOLOGY ........................ 111 Abstract ......................................................................................................... 111 Introduction .................................................................................................... 111 Results ......................................................................................................... 113 Discussion ......................................................................................................... 116 Materials and Methods ........................................................................................ 117 Acknowledgements .............................................................................................. 118 References ......................................................................................................... 119 Figures ......................................................................................................... 120 CHAPTER 7 CONCLUSIONS AND FUTURE DIRECTIONS ........................... 124 Conclusions ......................................................................................................... 124 Future Directions ................................................................................................ 125 References ......................................................................................................... 128 Figures ......................................................................................................... 129 ACKNOWLEDGMENTS ......................................................................................... 130 iv ABSTRACT Secondary metabolites play a significant role in mediating plant-microbe interactions. Rice (Oryza sativa) is one of the most important staple crops. Once rice is attacked by microbial pathogens, it will produce phytoalexins antibiotics to defend against enemies such as the bacterial pathogen Xanthomonas oryzae. Diterpenoids provide a rich source of metabolites mediating rice-X. oryzae interaction. First, gibberellin (GA), as complex diterpenoid phytohormone, besides the profound effects on plant growth and development, it has been shown to negatively regulate rice defense. Interestingly, we found a putative GA biosynthetic gene
Load more

Recommended publications
  • Xanthomonas Oryzae
    EPPO quarantine pest Prepared by CABI and EPPO for the EU under Contract 90/399003 Data Sheets on Quarantine Pests Xanthomonas oryzae The newly constituted species X. oryzae includes the two non-European rice pathogens pvs oryzae and oryzicola. These present a phytosanitary risk for the EPPO region which can be met by similar measures; they are accordingly treated together in this data sheet. IDENTITY Taxonomic position: Bacteria: Gracilicutes Notes on taxonomy and nomenclature: Swings et al. (1990) has recently transferred the two pathovars covered by this data sheet from Xanthomonas campestris to X. oryzae. • Xanthomonas oryzae pv. oryzae Name:Xanthomonas oryzae pv. oryzae (Ishiyama) Swings et al. Synonyms: Pseudomonas oryzae Ishiyama Xanthomonas campestris pv. oryzae (Ishiyama) Dye Xanthomonas itoana (Tachinai) Dowson Xanthomonas kresek Schure Xanthomonas oryzae (Ishiyama) Dowson Xanthomonas translucens f.sp. oryzae (Ishiyama) Pordesimo (this name has also, incorrectly, been used for pv. oryzicola). Common names: Bacterial leaf blight, Kresek disease, BLB (English) Maladie bactérienne des feuilles du riz (French) Bakterielle Weissfleckenkrankheit, bakterieller Blattbrand (German) Enfermedad bacteriana de las hojas del arroz (Spanish) Bayer computer code: XANTOR EPPO A1 list: No. 2 EU Annex designation: II/A1 - as Xanthomonas campestris pv. oryzae • Xanthomonas oryzae pv. oryzicola Name:Xanthomonas oryzae pv. oryzicola (Fang et al.) Swings et al. Synonyms: Xanthomonas campestris pv. oryzicola (Fang et al.) Dye Xanthomonas oryzicola Fang et al. Xanthomonas translucens f.sp. oryzicola (Fang et al.) Bradbury Common names: Bacterial leaf streak, BLS (English) Brûlure bactérienne, stries bactériennes, du riz (French) Quemaduras bacterianas, estrías bacterianas, del arroz (Spanish) Bayer computer code: XANTTO EPPO A1 list: No.
    [Show full text]
  • Molecular Biology of Disease Resistance in Rice
    Physiological and Molecular Plant Pathology (2001) 59, 1±11 doi:10.1006/pmpp.2001.0353, available online at http://www.idealibrary.com on MINI-REVIEW Molecular biology of disease resistance in rice FENGMING SONG1,2 and ROBERT M. GOODMAN1* 1Department of Plant Pathology, University of Wisconsin, 1630 Linden Drive, Madison, WI 53706, U.S.A. and 2Department of Plant Protection, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang, 310029, P.R. China (Accepted for publication 13 August 2001) Rice is one of the most important staple foods for the understanding the molecular biology of disease resistance increasing world population, especially in Asia. Diseases in rice is a prerequisite. are among the most important limiting factors that aect In recent years, rice has been recognized as a genetic rice production, causing annual yield loss conservatively model for molecular biology research aimed toward estimated at 5 %. More than 70 diseases caused by fungi, understanding mechanisms for growth, development and bacteria, viruses or nematodes have been recorded on rice stress tolerance as well as disease resistance [34]. Rice as a [68], among which rice blast (Magnaporthe grisea), model crop is a fortuitous situation since it is also a crop of bacterial leaf blight (Xanthomonas oryzae pv. oryzae) and world signi®cance. Rice is an attractive model for plant sheath blight (Rhizoctonia solani) are the most serious genetics and genomics because it has a relatively small constraints on high productivity [68]. Resistant cultivars genome. Considerable progress has been made in rice and application of pesticides have been used for disease towards cloning and identi®cation of disease resistance control.
    [Show full text]
  • Bacterial Blight of Rice
    Bacterial blight of rice Xanthomonas oryzae pv. oryzae (ex Ishiyama 1922, Swings et al, 1990) (Bacteria, Xanthomonadaceae) Primary hosts Rice, species of wild rice (Oryza sativa, O. rufipogon, O. australiensis), and graminaceous weeds, Leersia oryzoides and Zizania latifolia in temperate regions and Leptochloa spp. and Cyperus spp. in the tropics. Symptoms Small, green water-soaked spots develop at the tips and margins of fully developed leaves, and then expand along the veins, merge and become chlorotic then necrotic forming opaque, white to grey colored lesions that extend from leaf tip down along the leaf veins and margins. Both bacterial blight and bacterial leaf streak can occur simultaneously and are difficult to distinguish. Life cycle Bacteria enter through hydathodes at the leaf tip or margin, then multiply in intercellular spaces and spread through the xylem. This is different to the invasion and development of X. oryzae.pv. oryzicola which causes Bacterial Leaf Streak of rice. Access into the plant can also occur through wounds and other openings. Bacteria move vertically and laterally along the veins and ooze out from the hydathodes, beading on the leaf surface. Wind and rain disseminate bacteria, monsoon season being the worst time for infection. Contaminated stubble, irrigation water, humans, insects and birds are also sources of infection. Bacteria can survive the winter even in temperate regions in weeds or in stubble. They can survive in soil for 1-3 months. Current geographical distribution Asia, W. Africa, Australia, Latin America, Caribbean in both tropical and temperate areas. Impact in Oregon Negligible. References Gonzalez, C., B. Szurek, C.
    [Show full text]
  • Xanthomonas Oryzae Pv. Oryzae (Xanthomonadales: Xanthomonadaceae)
    Capítulo 22 Xanthomonas oryzae pv. oryzae (Xanthomonadales: Xanthomonadaceae) Márcio Elias Ferreira, Paulo Hideo Nakano Rangel Identificação da praga Nome científico: • Xanthomonas oryzae pv. oryzae (Ishiyama, 1922) Swings et al. (1990). Posição taxonômica: • Classe: Gammaproteobacteria. • Ordem: Xanthomonodales. • Família: Xanthomonadaceae. Sinonímias: • Pseudomonas oryzae Ishiyama. • Xanthomonas campestris pv. oryzae (Ishiyama) Dye. 368 PRIORIZAÇÃO DE PRAGAS QUARENTENÁRIAS AUSENTES NO BRASIL • Xanthomonas itoana (Tachinai) Dowson. • Xanthomonas kresek Schure. • Xanthomonas oryzae (Ishiyama) Dowson. • Xanthomonas translucens f.sp. oryzae (Ishiyama) Pordesimo. Nome comum: • Crestamento ou murcha bacteriana (Português). • Enfermedad bacteriana de las hojas del arroz (Espanhol). • Bacterial leaf blight (BLB), Kresek disease, bacterial blight (BB) (Inglês). • Maladie bactérienne des feuilles du riz (Francês). Abreviação: Xoo Hospedeiros A principal espécie agrícola infectada por Xanthomonas oryzae pv. oryzae (Xoo) é o arroz (Oryza sativa L.). A bactéria causa doença também em várias outras gramíneas, como Cynodon dactylon, Cyperus spp., Leersia spp., Leptochloa spp., Panicum maximum, Paspalum scrobiculatum, Zizania spp., Zoysia spp., e espécies silvestres de arroz (Oryza spp.) (Ou, 1985; Mew, 1987). Muitas outras gramíneas apresentam compatibilidade com a bactéria quando inoculadas artificialmente (Bradbury, 1970a; 1970b). O nível de suscetibilidade varia bastante entre as espécies submetidas a inoculação. Distribuição geográfica da praga O crestamento bacteriano do arroz é endêmico da Ásia e África Ociden- tal. A doença foi também descrita na Austrália e em vários países da América Latina e do Caribe (Mew et al., 1993). A bactéria foi detectada nas regiões destacadas na Figura 1: CAPÍTULO 22 – XaNTHOMONAS ORYZAE PV. ORYZAE (XANTHOMONADALES: XANTHOMONADACEAE) 369 • América do Norte: México. • América Central e Caribe: Costa Rica, El Salvador, Honduras, Nica- rágua, Panamá.
    [Show full text]
  • Xanthomonas Oryzae
    EuropeanBlackwell Publishing Ltd and Mediterranean Plant Protection Organization PM 7/80 (1) Organisation Européenne et Méditerranéenne pour la Protection des Plantes Diagnostics Diagnostic Xanthomonas oryzae Specific scope Specific approval and amendment This standard describes a diagnostic protocol for Xanthomonas Approved in 2007-09. oryzae pathovars oryzae and oryzicola. in the United States and India (Jones et al., 1989; Gnanamanickam Introduction et al., 1993). The species Xanthomonas oryzae includes two pathovars, Bacterial leaf streak of rice (BLS) is caused by X. oryzae pv. namely, oryzae and oryzicola (Swings et al., 1990). These oryzicola. The disease is present in Tropical Asia, West Africa bacterial pathogens are closely related organisms and were and Australia (OEPP/EPPO, 2006b). X. oryzae pv. oryzicola earlier named as pathovars of Xanthomonas campestris. Rice is has reached epidemic proportions in recent years in China. the main host for both pathogens, which are seed-borne and Other hosts affected by the pathogen are: Oryza spp., Leersia seed-transmitted. spp., Leptochloa filiformis, Paspalum orbiculare, Zizania Bacterial leaf blight of rice (BLB) was first reported in aquatica, Z. palustris and Zoysia japonica. No races have been Fukuoka Prefecture, Japan, during 1884 in rice affected by X. recorded, however, differences in virulence of strains have been oryzae pv. oryzae. This disease is considered one of the most observed in many countries (Vera Cruz et al., 1984; Adhikari & serious rice diseases worldwide although it has declined in Mew, 1985; Saddler, 2002b). incidence in Japan since the mid 1970s. Nevertheless it is still Further information on the biology and ecology of the prevalent worldwide.
    [Show full text]
  • Xanthomonas Oryzae Pv. Oryzae
    Xanthomonas oryzae pv. oryzae Scientific Name Xanthomonas oryzae pv. oryzae (Ishiyama, 1922) Swings et al. (1990) Synonyms: Pseudomonas oryzae, Xanthomonas campestris pv. oryzae, Xanthomonas itoana, Xanthomonas kresek, Xanthomonas oryzae, Xanthomonas translucens f.sp. oryzae Common Name(s) Bacterial leaf blight (BLB), kresek disease, and bacterial blight (BB) Type of Pest Plant pathogenic bacterium Taxonomic Position Class: Gammaproteobacteria, Order: Xanthomonodales, Family: Xanthomonodaceae Reason for Inclusion in Manual CAPS Target: AHP Prioritized Pest List – 2006 through 2012 (as Xanthomonas oryzae) Pest Description Xanthomonas oryzae pv. oryzae (Xoo) is a gram-negative bacterium. It is a non- sporeforming rod and is 0.55 to 0.75 x 1.35 to 2.17 μm in size. Colonies are light yellow, circular, convex, and smooth. The bacterium produces a yellow water-soluble pigment (Fig. Figure 1: Colonies formed by 1). Bacteriological tests useful in Xanthomonas oryzae pv. oryzae distinguishing X. oryzae pv. oryzae from X. streaked on peptone sucrose agar oryzae pv. oryzicola, which causes bacterial plate. Photo courtesy of Jan Leach, leaf streak of rice and can mimic bacterial Colorado State University. blight, are listed in Table 1 below (Vera Cruz et al., 1984; Bradbury, 1986; Mew, 1992; Mew and Misra, 1994). The bacterium is systemic in the xylem of the rice host. A type III protein secretion system exists in this bacterium to directly inject virulence factors into the host (Furutani et al., 2009) Last Update: 7/28/16 1 A pathovar is a bacterial strain (or set of strains) with similar characteristics that are usually distinguished by a different host range. In this case, Xanthomonas oryzae has two pathovars (Xanthomonas oryzae pv.
    [Show full text]
  • From Pseudomonas to Xanthomonas Li Wang Iowa State University
    Iowa State University Capstones, Theses and Retrospective Theses and Dissertations Dissertations 2007 Understanding the virulence mechanisms of bacterial phytopathogens: from Pseudomonas to Xanthomonas Li Wang Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/rtd Part of the Agricultural Science Commons, Agronomy and Crop Sciences Commons, and the Plant Pathology Commons Recommended Citation Wang, Li, "Understanding the virulence mechanisms of bacterial phytopathogens: from Pseudomonas to Xanthomonas" (2007). Retrospective Theses and Dissertations. 15915. https://lib.dr.iastate.edu/rtd/15915 This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. Understanding the virulence mechanisms of bacterial phytopathogens: from Pseudomonas to Xanthomonas by Li Wang A dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Major: Molecular, Cellular and Developmental Biology Program of Study Committee: Adam J. Bogdanove, Major Professor Gwyn A. Beattie Madan K.Bhattacharyya Steve A.Whitham Dan Voytas Iowa State University Ames, Iowa 2007 Copyright © Li Wang, 2007. All rights reserved. UMI Number: 3274857 UMI Microform 3274857 Copyright 2007 by ProQuest Information and Learning Company. All rights reserved. This microform edition is protected against unauthorized copying under Title 17, United States Code. ProQuest Information and Learning Company 300 North Zeeb Road P.O. Box 1346 Ann Arbor, MI 48106-1346 ii Dedicated to my husband, Hui, my son, David and my parents Zhengling and Fengmei, who made my life joyful and meaningful.
    [Show full text]
  • Xanthomonas Oryzae
    EuropeanBlackwell Publishing Ltd and Mediterranean Plant Protection Organization PM 7/80 (1) Organisation Européenne et Méditerranéenne pour la Protection des Plantes Diagnostics Diagnostic Xanthomonas oryzae Specific scope Specific approval and amendment This standard describes a diagnostic protocol for Xanthomonas Approved in 2007-09. oryzae pathovars oryzae and oryzicola. in the United States and India (Jones et al., 1989; Gnanamanickam Introduction et al., 1993). The species Xanthomonas oryzae includes two pathovars, Bacterial leaf streak of rice (BLS) is caused by X. oryzae pv. namely, oryzae and oryzicola (Swings et al., 1990). These oryzicola. The disease is present in Tropical Asia, West Africa bacterial pathogens are closely related organisms and were and Australia (OEPP/EPPO, 2006b). X. oryzae pv. oryzicola earlier named as pathovars of Xanthomonas campestris. Rice is has reached epidemic proportions in recent years in China. the main host for both pathogens, which are seed-borne and Other hosts affected by the pathogen are: Oryza spp., Leersia seed-transmitted. spp., Leptochloa filiformis, Paspalum orbiculare, Zizania Bacterial leaf blight of rice (BLB) was first reported in aquatica, Z. palustris and Zoysia japonica. No races have been Fukuoka Prefecture, Japan, during 1884 in rice affected by X. recorded, however, differences in virulence of strains have been oryzae pv. oryzae. This disease is considered one of the most observed in many countries (Vera Cruz et al., 1984; Adhikari & serious rice diseases worldwide although it has declined in Mew, 1985; Saddler, 2002b). incidence in Japan since the mid 1970s. Nevertheless it is still Further information on the biology and ecology of the prevalent worldwide.
    [Show full text]
  • Trends in Molecular Diagnosis and Diversity Studies for Phytosanitary Regulated Xanthomonas
    microorganisms Review Trends in Molecular Diagnosis and Diversity Studies for Phytosanitary Regulated Xanthomonas Vittoria Catara 1,* , Jaime Cubero 2 , Joël F. Pothier 3 , Eran Bosis 4 , Claude Bragard 5 , Edyta Ðermi´c 6 , Maria C. Holeva 7 , Marie-Agnès Jacques 8 , Francoise Petter 9, Olivier Pruvost 10 , Isabelle Robène 10 , David J. Studholme 11 , Fernando Tavares 12,13 , Joana G. Vicente 14 , Ralf Koebnik 15 and Joana Costa 16,17,* 1 Department of Agriculture, Food and Environment, University of Catania, 95125 Catania, Italy 2 National Institute for Agricultural and Food Research and Technology (INIA), 28002 Madrid, Spain; [email protected] 3 Environmental Genomics and Systems Biology Research Group, Institute for Natural Resource Sciences, Zurich University of Applied Sciences (ZHAW), 8820 Wädenswil, Switzerland; [email protected] 4 Department of Biotechnology Engineering, ORT Braude College of Engineering, Karmiel 2161002, Israel; [email protected] 5 UCLouvain, Earth & Life Institute, Applied Microbiology, 1348 Louvain-la-Neuve, Belgium; [email protected] 6 Department of Plant Pathology, Faculty of Agriculture, University of Zagreb, 10000 Zagreb, Croatia; [email protected] 7 Benaki Phytopathological Institute, Scientific Directorate of Phytopathology, Laboratory of Bacteriology, GR-14561 Kifissia, Greece; [email protected] 8 IRHS, INRA, AGROCAMPUS-Ouest, Univ Angers, SFR 4207 QUASAV, 49071 Beaucouzé, France; Citation: Catara, V.; Cubero, J.; [email protected] 9 Pothier, J.F.; Bosis, E.; Bragard, C.; European and Mediterranean Plant Protection Organization (EPPO/OEPP), 75011 Paris, France; Ðermi´c,E.; Holeva, M.C.; Jacques, [email protected] 10 CIRAD, UMR PVBMT, F-97410 Saint Pierre, La Réunion, France; [email protected] (O.P.); M.-A.; Petter, F.; Pruvost, O.; et al.
    [Show full text]
  • Pathogenic and Beneficial Plant-Associated Bacteria – Leonardo De La Fuente and Saul Burdman
    AGRICULTURAL SCIENCES – Pathogenic and Beneficial Plant-Associated Bacteria – Leonardo De La Fuente and Saul Burdman PATHOGENIC AND BENEFICIAL PLANT-ASSOCIATED BACTERIA Leonardo De La Fuente Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, USA Saul Burdman Department of Plant Pathology and Microbiology, Robert H. Smith Faculty of Agriculture, Food and Environment , The Hebrew University of Jerusalem, Rehovot, Israel Keywords: Phytobacteriology, pathogenicity, beneficial bacteria, plant resistance, disease control, plant immunity, systemic resistance, genome sequence, bacterial wilt, crown gall, fire blight, citrus canker, citrus greening, bacterial soft rot, Pierce’s disease, bacterial leaf blight, black rot, Bacterial fruit blotch, PGPR, biological nitrogen fixation. Contents 1. Introduction 2. Phytopathogenic bacteria: worldwide importance and economic impact 3. Phytopathology and Phytobacteriology: historical background 4. Classification of plant pathogenic bacteria 5. Bacterial infection cycles: inoculation and spread 6. Economically important plant diseases caused by bacteria 6.1. Bacterial wilt 6.2. Crown gall 6.3. Fire blight 6.4. Citrus canker 6.5. Citrus greening 6.6. Bacterial soft rot 6.7. Pierce’s disease 6.8 Bacterial leaf blight 6.9. Black rot disease 6.10. Bacterial fruit blotch 7. Control of bacterial diseases 8. Mechanisms of pathogenicity of plant pathogenic bacteria 8.1. TypeUNESCO III secretion system and protein – effectors EOLSS 8.2. Toxins 8.3. Extracellular polysaccharides 8.4. Growth regulatorsSAMPLE CHAPTERS 8.5. Cell wall degrading enzymes 8.6. Attachment structures 8.7. Biofilm formation 8.8. Siderophores 9. Defense responses of plants against pathogens 9.1. Plant immunity 9.2. Systemic resistance 10. Beneficial plant-associated bacteria ©Encyclopedia of Life Support Systems (EOLSS) AGRICULTURAL SCIENCES – Pathogenic and Beneficial Plant-Associated Bacteria – Leonardo De La Fuente and Saul Burdman 11.
    [Show full text]
  • Xanthomonas Oryzae Pathovars: Model Pathogens of a Model Crop
    UC Davis UC Davis Previously Published Works Title Xanthomonas oryzae pathovars: model pathogens of a model crop. Permalink https://escholarship.org/uc/item/4bv915nf Journal Molecular plant pathology, 7(5) ISSN 1364-3703 Authors Niño-Liu, David O Ronald, Pamela C Bogdanove, Adam J Publication Date 2006-09-01 Peer reviewed eScholarship.org Powered by the California Digital Library University of California MOLECULAR PLANT PATHOLOGY (2006) 7(5), 303–324 DOI: 10.1111/J.1364-3703.2006.00344.X PBlackwellathogen Publishing Ltd profile Xanthomonas oryzae pathovars: model pathogens of a model crop DAVID O. NIÑO-LIU1, PAMELA C. RONALD2 AND ADAM J. BOGDANOVE1* 1Department of Plant Pathology, Iowa State University, Ames, IA 50011, USA 2Department of Plant Pathology, University of California, Davis, CA 95616, USA Rice is a worldwide staple as well as a model for cereal biology SUMMARY (Bennetzen and Ma, 2003; Ronald and Leung, 2002; Shimamoto Xanthomonas oryzae pv. oryzae and Xanthomonas oryzae pv. and Kyozuka, 2002). Xoo and Xoc are important both from the oryzicola cause bacterial blight and bacterial leaf streak of rice standpoint of food security and as models for understanding fun- (Oryza sativa), which constrain production of this staple crop in damental aspects of bacterial interactions with plants. Despite much of Asia and parts of Africa. Tremendous progress has been the close relatedness of Xoo and Xoc (Ochiai and Kaku, 1999; made in characterizing the diseases and breeding for resistance. Vauterin et al., 1995), they infect their host in distinct ways. X. oryzae pv. oryzae causes bacterial blight by invading the vas- Genetic resistance to BB and BLS is also distinct.
    [Show full text]
  • Resistance Genes and Their Interactions with Bacterial Blight/Leaf Streak Pathogens (Xanthomonas Oryzae) in Rice (Oryza Sativa L.)—An Updated Review
    Jiang et al. Rice (2020) 13:3 https://doi.org/10.1186/s12284-019-0358-y REVIEW Open Access Resistance Genes and their Interactions with Bacterial Blight/Leaf Streak Pathogens (Xanthomonas oryzae) in Rice (Oryza sativa L.)—an Updated Review Nan Jiang1,2, Jun Yan3, Yi Liang1,2, Yanlong Shi2, Zhizhou He2, Yuntian Wu2, Qin Zeng2, Xionglun Liu1* and Junhua Peng1,2* Abstract Rice (Oryza sativa L.) is a staple food crop, feeding more than 50% of the world’s population. Diseases caused by bacterial, fungal, and viral pathogens constantly threaten the rice production and lead to enormous yield losses. Bacterial blight (BB) and bacterial leaf streak (BLS), caused respectively by gram-negative bacteria Xanthomonas oryzae pv. oryzae (Xoo) and Xanthomonas oryzae pv. oryzicola (Xoc), are two important diseases affecting rice production worldwide. Due to the economic importance, extensive genetic and genomic studies have been conducted to elucidate the molecular mechanism of rice response to Xoo and Xoc in the last two decades. A series of resistance (R) genes and their cognate avirulence and virulence effector genes have been characterized. Here, we summarize the recent advances in studies on interactions between rice and the two pathogens through these R genes or their products and effectors. Breeding strategies to develop varieties with durable and broad-spectrum resistance to Xanthomonas oryzae based on the published studies are also discussed. Keywords: Rice, Xanthomonas oryzae, Bacterial blight, Bacterial leaf streak, R genes, TAL effector Background in intracellular calcium concentration, callose deposition Plants are always attacked by diverse and widespread po- in cell wall, antimicrobial compounds called phyto- tential pathogens, which cause numerous diseases.
    [Show full text]