151
|
Manoharan B, Qi SS, Dhandapani V, Chen Q, Rutherford S, Wan JS, Jegadeesan S, Yang HY, Li Q, Li J, Dai ZC, Du DL. Gene Expression Profiling Reveals Enhanced Defense Responses in an Invasive Weed Compared to Its Native Congener During Pathogenesis. Int J Mol Sci 2019; 20:E4916. [PMID: 31623404 PMCID: PMC6801458 DOI: 10.3390/ijms20194916] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/24/2019] [Accepted: 10/01/2019] [Indexed: 11/16/2022] Open
Abstract
Invasive plants are a huge burden on the environment, and modify local ecosystems by affecting the indigenous biodiversity. Invasive plants are generally less affected by pathogens, although the underlying molecular mechanisms responsible for their enhanced resistance are unknown. We investigated expression profiles of three defense hormones (salicylic acid, jasmonic acid, and ethylene) and their associated genes in the invasive weed, Alternanthera philoxeroides, and its native congener, A. sessilis, after inoculation with Rhizoctonia solani. Pathogenicity tests showed significantly slower disease progression in A. philoxeroides compared to A. sessilis. Expression analyses revealed jasmonic acid (JA) and ethylene (ET) expressions were differentially regulated between A. philoxeroides and A. sessilis, with the former having prominent antagonistic cross-talk between salicylic acid (SA) and JA, and the latter showing weak or no cross-talk during disease development. We also found that JA levels decreased and SA levels increased during disease development in A. philoxeroides. Variations in hormonal gene expression between the invasive and native species (including interspecific differences in the strength of antagonistic cross-talk) were identified during R. solani pathogenesis. Thus, plant hormones and their cross-talk signaling may improve the resistance of invasive A. philoxeroides to pathogens, which has implications for other invasive species during the invasion process.
Collapse
Affiliation(s)
- Bharani Manoharan
- Institute of Environment and Ecology, Academy of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang 212013, China.
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Shan-Shan Qi
- Institute of Environment and Ecology, Academy of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang 212013, China.
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
- School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Vignesh Dhandapani
- Environmental Genomics Group, School of Biosciences, University of Birmingham, Birmingham B15 2TT, UK.
| | - Qi Chen
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Susan Rutherford
- The Royal Botanic Gardens and Domain Trust, Mrs Macquaries Road, Sydney, NSW 2000, Australia.
| | - Justin Sh Wan
- School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
- The Royal Botanic Gardens and Domain Trust, Mrs Macquaries Road, Sydney, NSW 2000, Australia.
| | - Sridharan Jegadeesan
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 761001, Israel.
| | - Hong-Yu Yang
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Qin Li
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Jian Li
- Institute of Environment and Ecology, Academy of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang 212013, China.
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Zhi-Cong Dai
- Institute of Environment and Ecology, Academy of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang 212013, China.
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
- School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
- Institute of Agricultural Engineering, Jiangsu University, Xuefu Road 301, Zhenjiang 212013, China..
| | - Dao-Lin Du
- Institute of Environment and Ecology, Academy of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang 212013, China.
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| |
Collapse
|
152
|
Active Fungal Communities in Asymptomatic Eucalyptus grandis Stems Differ between a Susceptible and Resistant Clone. Microorganisms 2019; 7:microorganisms7100375. [PMID: 31547186 PMCID: PMC6843230 DOI: 10.3390/microorganisms7100375] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/06/2019] [Accepted: 08/09/2019] [Indexed: 11/20/2022] Open
Abstract
Fungi represent a common and diverse part of the microbial communities that associate with plants. They also commonly colonise various plant parts asymptomatically. The molecular mechanisms of these interactions are, however, poorly understood. In this study we use transcriptomic data from Eucalyptus grandis, to demonstrate that RNA-seq data are a neglected source of information to study fungal–host interactions, by exploring the fungal transcripts they inevitably contain. We identified fungal transcripts from E. grandis data based on their sequence dissimilarity to the E. grandis genome and predicted biological functions. Taxonomic classifications identified, amongst other fungi, many well-known pathogenic fungal taxa in the asymptomatic tissue of E. grandis. The comparison of a clone of E. grandis resistant to Chrysoporthe austroafricana with a susceptible clone revealed a significant difference in the number of fungal transcripts, while the number of fungal taxa was not substantially affected. Classifications of transcripts based on their respective biological functions showed that the fungal communities of the two E. grandis clones associate with fundamental biological processes, with some notable differences. To shield the greater host defence machinery in the resistant E. grandis clone, fungi produce more secondary metabolites, whereas the environment for fungi associated with the susceptible E. grandis clone is more conducive for building fungal cellular structures and biomass growth. Secreted proteins included carbohydrate active enzymes that potentially are involved in fungal–plant and fungal–microbe interactions. While plant transcriptome datasets cannot replace the need for designed experiments to probe plant–microbe interactions at a molecular level, they clearly hold potential to add to the understanding of the diversity of plant–microbe interactions.
Collapse
|
153
|
Visser EA, Wegrzyn JL, Steenkamp ET, Myburg AA, Naidoo S. Dual RNA-Seq Analysis of the Pine- Fusarium circinatum Interaction in Resistant ( Pinus tecunumanii) and Susceptible ( Pinus patula) Hosts. Microorganisms 2019; 7:E315. [PMID: 31487786 PMCID: PMC6780516 DOI: 10.3390/microorganisms7090315] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/15/2019] [Accepted: 08/20/2019] [Indexed: 12/15/2022] Open
Abstract
Fusarium circinatum poses a serious threat to many pine species in both commercial and natural pine forests. Knowledge regarding the molecular basis of pine-F. circinatum host-pathogen interactions could assist efforts to produce more resistant planting stock. This study aimed to identify molecular responses underlying resistance against F. circinatum. A dual RNA-seq approach was used to investigate host and pathogen expression in F. circinatum challenged Pinus tecunumanii (resistant) and Pinus patula (susceptible), at three- and seven-days post inoculation. RNA-seq reads were mapped to combined host-pathogen references for both pine species to identify differentially expressed genes (DEGs). F. circinatum genes expressed during infection showed decreased ergosterol biosynthesis in P. tecunumanii relative to P. patula. For P. tecunumanii, enriched gene ontologies and DEGs indicated roles for auxin-, ethylene-, jasmonate- and salicylate-mediated phytohormone signalling. Correspondingly, key phytohormone signaling components were down-regulated in P. patula. Key F. circinatum ergosterol biosynthesis genes were expressed at lower levels during infection of the resistant relative to the susceptible host. This study further suggests that coordination of phytohormone signaling is required for F. circinatum resistance in P. tecunumanii, while a comparatively delayed response and impaired phytohormone signaling contributes to susceptibility in P. patula.
Collapse
Affiliation(s)
- Erik A Visser
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Centre for Bioinformatics and Computational Biology, University of Pretoria, Private Bag X20, Pretoria 0028, South Africa
| | - Jill L Wegrzyn
- Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT 06269, USA
| | - Emma T Steenkamp
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Centre for Bioinformatics and Computational Biology, University of Pretoria, Private Bag X20, Pretoria 0028, South Africa
| | - Alexander A Myburg
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Centre for Bioinformatics and Computational Biology, University of Pretoria, Private Bag X20, Pretoria 0028, South Africa
| | - Sanushka Naidoo
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Centre for Bioinformatics and Computational Biology, University of Pretoria, Private Bag X20, Pretoria 0028, South Africa.
| |
Collapse
|
154
|
Naranjo‐Ortiz MA, Gabaldón T. Fungal evolution: major ecological adaptations and evolutionary transitions. Biol Rev Camb Philos Soc 2019; 94:1443-1476. [PMID: 31021528 PMCID: PMC6850671 DOI: 10.1111/brv.12510] [Citation(s) in RCA: 127] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 03/10/2019] [Accepted: 03/13/2019] [Indexed: 12/13/2022]
Abstract
Fungi are a highly diverse group of heterotrophic eukaryotes characterized by the absence of phagotrophy and the presence of a chitinous cell wall. While unicellular fungi are far from rare, part of the evolutionary success of the group resides in their ability to grow indefinitely as a cylindrical multinucleated cell (hypha). Armed with these morphological traits and with an extremely high metabolical diversity, fungi have conquered numerous ecological niches and have shaped a whole world of interactions with other living organisms. Herein we survey the main evolutionary and ecological processes that have guided fungal diversity. We will first review the ecology and evolution of the zoosporic lineages and the process of terrestrialization, as one of the major evolutionary transitions in this kingdom. Several plausible scenarios have been proposed for fungal terrestralization and we here propose a new scenario, which considers icy environments as a transitory niche between water and emerged land. We then focus on exploring the main ecological relationships of Fungi with other organisms (other fungi, protozoans, animals and plants), as well as the origin of adaptations to certain specialized ecological niches within the group (lichens, black fungi and yeasts). Throughout this review we use an evolutionary and comparative-genomics perspective to understand fungal ecological diversity. Finally, we highlight the importance of genome-enabled inferences to envision plausible narratives and scenarios for important transitions.
Collapse
Affiliation(s)
- Miguel A. Naranjo‐Ortiz
- Department of Genomics and Bioinformatics, Centre for Genomic Regulation (CRG)The Barcelona Institute of Science and TechnologyDr. Aiguader 88, Barcelona08003Spain
| | - Toni Gabaldón
- Department of Genomics and Bioinformatics, Centre for Genomic Regulation (CRG)The Barcelona Institute of Science and TechnologyDr. Aiguader 88, Barcelona08003Spain
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF)08003BarcelonaSpain
- ICREA, Pg. Lluís Companys 2308010BarcelonaSpain
| |
Collapse
|
155
|
Prasad P, Savadi S, Bhardwaj SC, Gangwar OP, Kumar S. Rust pathogen effectors: perspectives in resistance breeding. PLANTA 2019; 250:1-22. [PMID: 30980247 DOI: 10.1007/s00425-019-03167-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 04/09/2019] [Indexed: 06/09/2023]
Abstract
Identification and functional characterization of plant pathogen effectors promise to ameliorate future research and develop effective and sustainable strategies for controlling or containing crop diseases. Wheat is the second most important food crop of the world after rice. Rust pathogens, one of the major biotic stresses in wheat production, are capable of threatening the world food security. Understanding the molecular basis of plant-pathogen interactions is essential for devising novel strategies for resistance breeding and disease management. Now, it has been established that effectors, the proteins secreted by pathogens, play a key role in plant-pathogen interactions. Therefore, effector biology has emerged as one of the most important research fields in plant biology. Recent advances in genomics and bioinformatics have allowed identification of a large repertoire of candidate effectors, while the evolving high-throughput tools have continued to assist in their functional characterization. The repertoires of effectors have become an important resource for better understanding of effector biology of pathosystems and resistance breeding of crop plants. In recent years, a significant progress has been made in the field of rust effector biology. This review describes the recent advances in effector biology of obligate fungal pathogens, identification and functional analysis of wheat rust pathogens effectors and the potential applications of effectors in molecular plant biology and rust resistance breeding in wheat.
Collapse
Affiliation(s)
- Pramod Prasad
- ICAR-Indian Institute of Wheat and Barley Research, Regional Station, Shimla, Himachal Pradesh, 171002, India
| | - Siddanna Savadi
- ICAR-Directorate of Cashew Research, Puttur, Karnataka, 574202, India
| | - S C Bhardwaj
- ICAR-Indian Institute of Wheat and Barley Research, Regional Station, Shimla, Himachal Pradesh, 171002, India.
| | - O P Gangwar
- ICAR-Indian Institute of Wheat and Barley Research, Regional Station, Shimla, Himachal Pradesh, 171002, India
| | - Subodh Kumar
- ICAR-Indian Institute of Wheat and Barley Research, Regional Station, Shimla, Himachal Pradesh, 171002, India
| |
Collapse
|
156
|
Wang Q, Chen X, Chai X, Xue D, Zheng W, Shi Y, Wang A. The Involvement of Jasmonic Acid, Ethylene, and Salicylic Acid in the Signaling Pathway of Clonostachys rosea-Induced Resistance to Gray Mold Disease in Tomato. PHYTOPATHOLOGY 2019; 109:1102-1114. [PMID: 30880572 DOI: 10.1094/phyto-01-19-0025-r] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Tomato gray mold disease caused by Botrytis cinerea is a serious disease that threatens tomato production around the world. Clonostachys rosea has been used successfully as a biocontrol agent against divergent plant pathogens, including B. cinerea. To understand the signal transduction pathway of C. rosea-induced resistance to tomato gray mold disease, the effects of C. rosea on gray mold tomato leaves along with changes in the activities of three defense enzymes (phenylalanine ammonialyase [PAL], polyphenol oxidase [PPO], and catalase [CAT]), second messengers (nitric oxide [NO], hydrogen peroxide [H2O2], and superoxide anion radical [O2-]), and stress-related genes (mitogen-activated protein kinase [MAPK], WRKY, Lexyl2, and atpA) in four different hormone-deficient (jasmonic acid [JA], ethylene [ET], salicylic acid [SA], and gibberellin) tomato mutants were investigated. The results revealed that C. rosea significantly inhibited the growth of mycelia and spore germination of B. cinerea. Furthermore, it reduced the incidence of gray mold disease, induced higher levels of PAL and PPO, and induced lower levels of CAT activities in tomato leaves. Moreover, it also increased NO, H2O2, and O2- levels and the gene expression levels of WRKY, MAPK, atpA, and Lexyl2. The incidence of gray mold disease in four hormone-deficient mutants was higher than that in the corresponding wild-type tomato plants. Among all of these hormone-deficient tomato mutants, JA had the most significant effect in regulating the different signal molecules. Additional study suggested that JA upregulated the expression of Lexyl2, MAPK, and WRKY but downregulated atpA. Furthermore, JA also enhanced the activity of PAL, PPO, and CAT and the production of NO and H2O2. SA downregulated CAT and PAL, whereas ET upregulated PAL but downregulated CAT. This study is of significance in understanding the regulatory pathways and biocontrol mechanism of C. rosea against B. cinerea.
Collapse
Affiliation(s)
- Qiuying Wang
- 1 College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Xiuling Chen
- 2 College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| | - Xinfeng Chai
- 1 College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Dongqi Xue
- 3 College of Horticulture, Henan Agricultural University, Zhengzhou 450000, China
| | - Wei Zheng
- 2 College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| | - Yuying Shi
- 2 College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| | - Aoxue Wang
- 1 College of Life Science, Northeast Agricultural University, Harbin 150030, China
- 2 College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| |
Collapse
|
157
|
Yu W, Yu M, Zhao R, Sheng J, Li Y, Shen L. Ethylene Perception Is Associated with Methyl-Jasmonate-Mediated Immune Response against Botrytis cinerea in Tomato Fruit. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:6725-6735. [PMID: 31117506 DOI: 10.1021/acs.jafc.9b02135] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Jasmonic acid (JA)- and ethylene-mediated signaling pathways are reported to have synergistic effects on inhibiting gray mold. The present study aimed to explain the role of ethylene perception in methyl jasmonate (MeJA)-mediated immune responses. Results showed that exogenous MeJA enhanced disease resistance, accompanied by the induction of endogenous JA biosynthesis and ethylene production, which led to the activation of the phenolic metabolism pathway. Blocking ethylene perception using 1-methylcyclopropene (1-MCP) either before or after MeJA treatment could differently weaken the disease responses induced by MeJA, including suppressing the induction of ethylene production and JA contents and reducing activities of lipoxygenase and allene oxide synthase compared to MeJA treatment alone. Consequently, MeJA-induced elevations in the total phenolic content and the activities of phenylalanine ammonia-lyase, cinnamate 4-hydroxylase, 4-coumarate:coenzyme A ligase, and peroxidase were impaired by 1-MCP. These results suggested that ethylene perception participated in MeJA-mediated immune responses in tomato fruit.
Collapse
Affiliation(s)
- Wenqing Yu
- College of Food Science and Nutritional Engineering , China Agricultural University , Beijing 100083 , People's Republic of China
| | - Mengmeng Yu
- College of Food Science and Nutritional Engineering , China Agricultural University , Beijing 100083 , People's Republic of China
| | - Ruirui Zhao
- College of Food Science and Nutritional Engineering , China Agricultural University , Beijing 100083 , People's Republic of China
| | - Jiping Sheng
- School of Agricultural Economics and Rural Development , Renmin University of China , Beijing 100872 , People's Republic of China
| | - Yujing Li
- College of Food Science and Nutritional Engineering , China Agricultural University , Beijing 100083 , People's Republic of China
| | - Lin Shen
- College of Food Science and Nutritional Engineering , China Agricultural University , Beijing 100083 , People's Republic of China
| |
Collapse
|
158
|
Liu S, Wang J, Jiang S, Wang H, Gao Y, Zhang H, Li D, Song F. Tomato SlSAP3, a member of the stress-associated protein family, is a positive regulator of immunity against Pseudomonas syringae pv. tomato DC3000. MOLECULAR PLANT PATHOLOGY 2019; 20:815-830. [PMID: 30907488 PMCID: PMC6637894 DOI: 10.1111/mpp.12793] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Tomato stress-associated proteins (SAPs) belong to A20/AN1 zinc finger protein family, some of which have been shown to play important roles in plant stress responses. However, little is known about the functions and underlying molecular mechanisms of SAPs in plant immune responses. In the present study, we reported the function of tomato SlSAP3 in immunity to Pseudomonas syringae pv. tomato (Pst) DC3000. Silencing of SlSAP3 attenuated while overexpression of SlSAP3 in transgenic tomato increased immunity to Pst DC3000, accompanied with reduced and increased Pst DC3000-induced expression of SA signalling and defence genes, respectively. Flg22-induced reactive oxygen species (ROS) burst and expression of PAMP-triggered immunity (PTI) marker genes SlPTI5 and SlLRR22 were strengthened in SlSAP3-OE plants but were weakened in SlSAP3-silenced plants. SlSAP3 interacted with two SlBOBs and the A20 domain in SlSAP3 is critical for the SlSAP3-SlBOB1 interaction. Silencing of SlBOB1 and co-silencing of all three SlBOB genes conferred increased resistance to Pst DC3000, accompanied with increased Pst DC3000-induced expression of SA signalling and defence genes. These data demonstrate that SlSAP3 acts as a positive regulator of immunity against Pst DC3000 in tomato through the SA signalling and that SlSAP3 may exert its function in immunity by interacting with other proteins such as SlBOBs, which act as negative regulators of immunity against Pst DC3000 in tomato.
Collapse
Affiliation(s)
- Shixia Liu
- National Key Laboratory for Rice Biology, Institute of BiotechnologyZhejiang UniversityHangzhouZhejiang310058China
| | - Jiali Wang
- National Key Laboratory for Rice Biology, Institute of BiotechnologyZhejiang UniversityHangzhouZhejiang310058China
| | - Siyu Jiang
- National Key Laboratory for Rice Biology, Institute of BiotechnologyZhejiang UniversityHangzhouZhejiang310058China
| | - Hui Wang
- National Key Laboratory for Rice Biology, Institute of BiotechnologyZhejiang UniversityHangzhouZhejiang310058China
| | - Yizhou Gao
- National Key Laboratory for Rice Biology, Institute of BiotechnologyZhejiang UniversityHangzhouZhejiang310058China
| | - Huijuan Zhang
- National Key Laboratory for Rice Biology, Institute of BiotechnologyZhejiang UniversityHangzhouZhejiang310058China
- College of Life ScienceTaizhou UniversityTaizhouZhejiang318000China
| | - Dayong Li
- National Key Laboratory for Rice Biology, Institute of BiotechnologyZhejiang UniversityHangzhouZhejiang310058China
| | - Fengming Song
- National Key Laboratory for Rice Biology, Institute of BiotechnologyZhejiang UniversityHangzhouZhejiang310058China
| |
Collapse
|
159
|
Hrytsev О. MULTIPLEX-TOUCHDOWN PCR FOR RAPID SIMULTANEOUS DETECTION OF Rhizoctonia cerealis AND Rhizoctonia solani. BIOTECHNOLOGIA ACTA 2019. [DOI: 10.15407/biotech12.03.075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
160
|
Ribeiro S, Tran DM, Déon M, Clément-Demange A, Garcia D, Soumahoro M, Masson A, Pujade-Renaud V. Gene deletion of Corynespora cassiicola cassiicolin Cas1 suppresses virulence in the rubber tree. Fungal Genet Biol 2019; 129:101-114. [PMID: 31108193 DOI: 10.1016/j.fgb.2019.05.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 03/30/2019] [Accepted: 05/16/2019] [Indexed: 12/25/2022]
Abstract
Corynespora cassiicola is an ascomycete fungus causing important damages in a wide range of plant hosts, including rubber tree. The small secreted protein cassiicolin is suspected to play a role in the onset of the disease in rubber tree, based on toxicity and gene expression profiles. However, its exact contribution to virulence, compared to other putative effectors, remains unclear. We created a deletion mutant targeting the cassiicolin gene Cas1 from the highly aggressive isolate CCP. Wild-type CCP and mutant ccpΔcas1 did not differ in terms of mycelium growth, sporulation, and germination rate in vitro. Cas1 gene deletion induced a complete loss of virulence on the susceptible clones PB260 and IRCA631, as revealed by inoculation experiments on intact (non-detached) leaves. However, residual symptoms persisted when inoculations were conducted on detached leaves, notably with longer incubation times. Complementation with exogenous cassiicolin restored the mutant capacity to colonize the leaf tissues. We also compared the toxicity of CCP and ccpΔcas1 culture filtrates, through electrolyte leakage measurements on abraded detached leaves, over a range of clones as well as an F1 population derived from the cross between the clones PB260 (susceptible) and RRIM600 (tolerant). On average, filtrate toxicity was lower but not fully suppressed in ccpΔcas1 compared to CCP, with clone-dependent variations. The two QTL, previously found associated with sensitivity to CPP filtrate or to the purified cassiicolin, were no longer detected with the mutant filtrate, while new QTL were revealed. Our results demonstrate that: (1) cassiicolin is a necrotrophic effector conferring virulence to the CCP isolate in susceptible rubber clones and (2) other effectors produced by CCP contribute to residual filtrate toxicity and virulence in senescing/wounded tissues. These other effectors may be involved in saprotrophy rather than necrotrophy.
Collapse
Affiliation(s)
- Sébastien Ribeiro
- Université Clermont Auvergne, Institut National de la Recherche Agronomique, UMR PIAF, Clermont-Ferrand, France; CIRAD, UMR AGAP, F-63000 Clermont-Ferrand, France; AGAP, Université Montpellier, CIRAD, Institut National de la Recherche Agronomique, Montpellier SupAgro, Montpellier, France
| | - Dinh Minh Tran
- CIRAD, UMR AGAP, F-63000 Clermont-Ferrand, France; AGAP, Université Montpellier, CIRAD, Institut National de la Recherche Agronomique, Montpellier SupAgro, Montpellier, France; Rubber Research Institute of Vietnam, Ho Chi Minh City, Viet Nam
| | - Marine Déon
- Université Clermont Auvergne, Institut National de la Recherche Agronomique, UMR PIAF, Clermont-Ferrand, France
| | - André Clément-Demange
- CIRAD, UMR AGAP, F-63000 Clermont-Ferrand, France; AGAP, Université Montpellier, CIRAD, Institut National de la Recherche Agronomique, Montpellier SupAgro, Montpellier, France
| | - Dominique Garcia
- CIRAD, UMR AGAP, F-63000 Clermont-Ferrand, France; AGAP, Université Montpellier, CIRAD, Institut National de la Recherche Agronomique, Montpellier SupAgro, Montpellier, France
| | - Mouman Soumahoro
- Société Africaine de Plantations d'Hévéas, 01 BP 1322 Abidjan 01, Cote d'Ivoire
| | - Aurélien Masson
- Société des Caoutchoucs de Grand-Béréby, Grand Béréby, Cote d'Ivoire
| | - Valérie Pujade-Renaud
- Université Clermont Auvergne, Institut National de la Recherche Agronomique, UMR PIAF, Clermont-Ferrand, France; CIRAD, UMR AGAP, F-63000 Clermont-Ferrand, France; AGAP, Université Montpellier, CIRAD, Institut National de la Recherche Agronomique, Montpellier SupAgro, Montpellier, France.
| |
Collapse
|
161
|
Zhang W, Corwin JA, Copeland DH, Feusier J, Eshbaugh R, Cook DE, Atwell S, Kliebenstein DJ. Plant-necrotroph co-transcriptome networks illuminate a metabolic battlefield. eLife 2019; 8:e44279. [PMID: 31081752 PMCID: PMC6557632 DOI: 10.7554/elife.44279] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 05/08/2019] [Indexed: 12/27/2022] Open
Abstract
A central goal of studying host-pathogen interaction is to understand how host and pathogen manipulate each other to promote their own fitness in a pathosystem. Co-transcriptomic approaches can simultaneously analyze dual transcriptomes during infection and provide a systematic map of the cross-kingdom communication between two species. Here we used the Arabidopsis-B. cinerea pathosystem to test how plant host and fungal pathogen interact at the transcriptomic level. We assessed the impact of genetic diversity in pathogen and host by utilization of a collection of 96 isolates infection on Arabidopsis wild-type and two mutants with jasmonate or salicylic acid compromised immunities. We identified ten B. cinereagene co-expression networks (GCNs) that encode known or novel virulence mechanisms. Construction of a dual interaction network by combining four host- and ten pathogen-GCNs revealed potential connections between the fungal and plant GCNs. These co-transcriptome data shed lights on the potential mechanisms underlying host-pathogen interaction.
Collapse
Affiliation(s)
- Wei Zhang
- Department of Plant PathologyKansas State UniversityManhattanUnited States
- Department of Plant SciencesUniversity of California, DavisDavisUnited States
| | - Jason A Corwin
- Department of Ecology and Evolution BiologyUniversity of ColoradoBoulderUnited States
| | | | - Julie Feusier
- Department of Plant SciencesUniversity of California, DavisDavisUnited States
| | - Robert Eshbaugh
- Department of Plant SciencesUniversity of California, DavisDavisUnited States
| | - David E Cook
- Department of Plant PathologyKansas State UniversityManhattanUnited States
| | - Suzi Atwell
- Department of Plant SciencesUniversity of California, DavisDavisUnited States
| | - Daniel J Kliebenstein
- Department of Plant SciencesUniversity of California, DavisDavisUnited States
- DynaMo Center of ExcellenceUniversity of CopenhagenFrederiksbergDenmark
| |
Collapse
|
162
|
Verwaaijen B, Wibberg D, Winkler A, Zrenner R, Bednarz H, Niehaus K, Grosch R, Pühler A, Schlüter A. A comprehensive analysis of the Lactuca sativa, L. transcriptome during different stages of the compatible interaction with Rhizoctonia solani. Sci Rep 2019; 9:7221. [PMID: 31076623 PMCID: PMC6510776 DOI: 10.1038/s41598-019-43706-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 04/30/2019] [Indexed: 12/19/2022] Open
Abstract
The leafy green vegetable Lactuca sativa, L. is susceptible to the soil-born fungus Rhizoctonia solani AG1-IB. In a previous study, we reported on the transcriptional response of R. solani AG1-IB (isolate 7/3/14) during the interspecies interaction with L. sativa cv. Tizian by means of RNA sequencing. Here we present the L. sativa transcriptome and metabolome from the same experimental approach. Three distinct interaction zones were sampled and compared to a blank (non-inoculated) sample: symptomless zone 1, zone 2 showing light brown discoloration, and a dark brown zone 3 characterized by necrotic lesions. Throughout the interaction, we observed a massive reprogramming of the L. sativa transcriptome, with 9231 unique genes matching the threshold criteria for differential expression. The lettuce transcriptome of the light brown zone 2 presents the most dissimilar profile compared to the uninoculated zone 4, marking the main stage of interaction. Transcripts putatively encoding several essential proteins that are involved in maintaining jasmonic acid and auxin homeostasis were found to be negatively regulated. These and other indicator transcripts mark a potentially inadequate defence response, leading to a compatible interaction. KEGG pathway mapping and GC-MS metabolome data revealed large changes in amino acid, lignin and hemicellulose related pathways and related metabolites.
Collapse
Affiliation(s)
- Bart Verwaaijen
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany
- Leibniz-Institute of Vegetable and Ornamental Crops (IGZ), Großbeeren, Germany
- Computational Biology, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Daniel Wibberg
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany
| | - Anika Winkler
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany
| | - Rita Zrenner
- Leibniz-Institute of Vegetable and Ornamental Crops (IGZ), Großbeeren, Germany
| | - Hanna Bednarz
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany
| | - Karsten Niehaus
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany
| | - Rita Grosch
- Leibniz-Institute of Vegetable and Ornamental Crops (IGZ), Großbeeren, Germany
| | - Alfred Pühler
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany
| | - Andreas Schlüter
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany.
| |
Collapse
|
163
|
Liu S, Yuan X, Wang Y, Wang H, Wang J, Shen Z, Gao Y, Cai J, Li D, Song F. Tomato Stress-Associated Protein 4 Contributes Positively to Immunity Against Necrotrophic Fungus Botrytis cinerea. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2019; 32:566-582. [PMID: 30589365 DOI: 10.1094/mpmi-04-18-0097-r] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Stress-associated proteins (SAPs) are A20 and AN1 domain-containing proteins, some of which play important roles in plant stress signaling. Here, we report the involvement of tomato SlSAP family in immunity. SlSAPs responded with different expression patterns to Botrytis cinerea and defense signaling hormones. Virus-induced gene silencing of each of the SlSAP genes and disease assays revealed that SlSAP4 and SlSAP10 play roles in immunity against B. cinerea. Silencing of SlSAP4 resulted in attenuated immunity to B. cinerea, accompanying increased accumulation of reactive oxygen species and downregulated expression of jasmonate and ethylene (JA/ET) signaling-responsive defense genes. Transient expression of SlSAP4 in Nicotiana benthamiana led to enhanced resistance to B. cinerea. Exogenous application of methyl jasmonate partially restored the resistance of the SlSAP4-silenced plants against B. cinerea. SlSAP4 interacted with three of four SlRAD23 proteins. The A20 domain in SlSAP4 and the Ub-associated domains in SlRAD23d are critical for SlSAP4-SlRAD23d interaction. Silencing of SlRAD23d led to decreased resistance to B. cinerea, but silencing of each of other SlRAD23s did not affect immunity against B. cinerea. Furthermore, silencing of SlSAP4 and each of the SlRAD23s did not affect immunity to Pseudomonas syringae pv. tomato DC3000. These data suggest that SlSAP4 contributes positively to tomato immunity against B. cinereal through affecting JA/ET signaling and may be involved in the substrate ubiquitination process via interacting with SlRAD23d.
Collapse
Affiliation(s)
- Shixia Liu
- National Key Laboratory for Rice Biology and Key Laboratory of Crop Diseases and Insect Pests of Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Xi Yuan
- National Key Laboratory for Rice Biology and Key Laboratory of Crop Diseases and Insect Pests of Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Yuyan Wang
- National Key Laboratory for Rice Biology and Key Laboratory of Crop Diseases and Insect Pests of Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Hui Wang
- National Key Laboratory for Rice Biology and Key Laboratory of Crop Diseases and Insect Pests of Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Jiali Wang
- National Key Laboratory for Rice Biology and Key Laboratory of Crop Diseases and Insect Pests of Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Zhihui Shen
- National Key Laboratory for Rice Biology and Key Laboratory of Crop Diseases and Insect Pests of Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Yizhou Gao
- National Key Laboratory for Rice Biology and Key Laboratory of Crop Diseases and Insect Pests of Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Jiating Cai
- National Key Laboratory for Rice Biology and Key Laboratory of Crop Diseases and Insect Pests of Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Dayong Li
- National Key Laboratory for Rice Biology and Key Laboratory of Crop Diseases and Insect Pests of Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Fengming Song
- National Key Laboratory for Rice Biology and Key Laboratory of Crop Diseases and Insect Pests of Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| |
Collapse
|
164
|
Mendoza-Martínez AE, Cano-Domínguez N, Aguirre J. Yap1 homologs mediate more than the redox regulation of the antioxidant response in filamentous fungi. Fungal Biol 2019; 124:253-262. [PMID: 32389287 DOI: 10.1016/j.funbio.2019.04.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 04/02/2019] [Accepted: 04/03/2019] [Indexed: 10/27/2022]
Abstract
The regulation of gene expression in response to increased levels of reactive oxygen species (ROS) is a ubiquitous response in aerobic organisms. However, different organisms use different strategies to perceive and respond to high ROS levels. Yeast Yap1 is a paradigmatic example of a specific mechanism used by eukaryotic cells to link ROS sensing and gene regulation. The activation of this transcription factor by H2O2 is mediated by peroxiredoxins, which are widespread enzymes that use cysteine thiols to sense ROS, as well as to catalyze the reduction of peroxides to water. In filamentous fungi, Yap1 homologs and peroxiredoxins also are major regulators of the antioxidant response. However, Yap1 homologs are involved in a wider array of processes by regulating genes involved in nutrient assimilation, secondary metabolism, virulence and development. Such novel functions illustrate the divergent roles of ROS and other oxidizing compounds as important regulatory signaling molecules.
Collapse
Affiliation(s)
- Ariann E Mendoza-Martínez
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Apartado Postal 70-242, 04510 Ciudad de México, Mexico
| | - Nallely Cano-Domínguez
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Apartado Postal 70-242, 04510 Ciudad de México, Mexico
| | - Jesús Aguirre
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Apartado Postal 70-242, 04510 Ciudad de México, Mexico.
| |
Collapse
|
165
|
Warzecha T, Skrzypek E, Adamski T, Surma M, Kaczmarek Z, Sutkowska A. Chlorophyll a Fluorescence Parameters of Hulled and Hull-less Barley ( Hordeum vulgare L.) DH Lines Inoculated with Fusarium culmorum. THE PLANT PATHOLOGY JOURNAL 2019; 35:112-124. [PMID: 31007641 PMCID: PMC6464203 DOI: 10.5423/ppj.oa.07.2018.0124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 10/17/2018] [Accepted: 02/12/2019] [Indexed: 06/09/2023]
Abstract
Barley worldwide is affected seriously by Fusarium seedling blight (FSB) and Fusarium head blight (FHB) diseases caused by the Fusarium species. The objective of this study was to facilitate the resistance of hulled and hull-less barley at different growth stages to F. culmorum according to direct parameters: disease rating (DR), fresh weight of leaves and roots, kernel weight per spike, kernel number per spike, plump kernels, and indirect parameters - chlorophyll a fluorescence (CF). Plate assay, greenhouse and field tests were performed on 30 spring barley doubled haploid (DH) lines and their parents infected with Fusarium culmorum. Direct parameters proved that hulled genotypes show less symptoms. Most studied chlorophyll a fluorescence (CF) parameters (apart from DIo/CS - amount of energy dissipated from PSII for laboratory test, TRo/CS - amount of excitation energy trapped in PSII reaction centers, ETo/CS - amount of energy used for electron transport and RC/CS - number of active reaction centres in the state of fully reduced PSII reaction center in field experiment) were significantly affected by F. culmorum infection. In all experiments, hulled genotypes had higher values of CF parameters compared to hull-less ones. Significant correlations were detected between direct and indirect parameters and also between various environments. It was revealed that ABS/CS, TRo/CS, and RC/CS have significant positive correlation in greenhouse test and field experiment. Significant correlations suggest the possibility of applying the CF parameters in selection of barley DH lines resistant to F. culmorum infection.
Collapse
Affiliation(s)
- Tomasz Warzecha
- University of Agriculture in Kraków, Department of Plant Breeding and Seed Science Łobzowska 24, 31-140 Kraków,
Poland
| | - Edyta Skrzypek
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239 Kraków,
Poland
| | - Tadeusz Adamski
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-681 Poznań,
Poland
| | - Maria Surma
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-681 Poznań,
Poland
| | - Zygmunt Kaczmarek
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-681 Poznań,
Poland
| | - Agnieszka Sutkowska
- University of Agriculture in Kraków, Department of Plant Breeding and Seed Science Łobzowska 24, 31-140 Kraków,
Poland
| |
Collapse
|
166
|
Jiang N, Fan X, Lin W, Wang G, Cai K. Transcriptome Analysis Reveals New Insights into the Bacterial Wilt Resistance Mechanism Mediated by Silicon in Tomato. Int J Mol Sci 2019; 20:ijms20030761. [PMID: 30754671 PMCID: PMC6387441 DOI: 10.3390/ijms20030761] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 01/30/2019] [Accepted: 02/04/2019] [Indexed: 12/20/2022] Open
Abstract
Bacterial wilt is a devastating disease of tomato caused by soilborne pathogenic bacterium Ralstonia solanacearum. Previous studies found that silicon (Si) can increase tomato resistance against R. solanacearum, but the exact molecular mechanism remains unclear. RNA sequencing (RNA-Seq) technology was used to investigate the dynamic changes of root transcriptome profiles between Si-treated (+Si) and untreated (−Si) tomato plants at 1, 3, and 7 days post-inoculation with R. solanacearum. The contents of salicylic acid (SA), ethylene (ET), and jasmonic acid (JA) and the activity of defense-related enzymes in roots of tomato in different treatments were also determined. The burst of ET production in roots was delayed, and SA and JA contents were altered in Si treatment. The transcriptional response to R. solanacearum infection of the +Si plants was quicker than that of the untreated plants. The expression levels of differentially-expressed genes involved in pathogen-associated molecular pattern-triggered immunity (PTI), oxidation resistance, and water-deficit stress tolerance were upregulated in the Si-treated plants. Multiple hormone-related genes were differentially expressed in the Si-treated plants. Si-mediated resistance involves mechanisms other than SA- and JA/ET-mediated stress responses. We propose that Si-mediated tomato resistance to R. solanacearum is associated with activated PTI-related responses and enhanced disease resistance and tolerance via several signaling pathways. Such pathways are mediated by multiple hormones (e.g., SA, JA, ET, and auxin), leading to diminished adverse effects (e.g., senescence, water-deficit, salinity and oxidative stress) normally caused by R. solanacearum infection. This finding will provide an important basis to further characterize the role of Si in enhancing plant resistance against biotic stress.
Collapse
Affiliation(s)
- Nihao Jiang
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.
- Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China.
| | - Xueying Fan
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.
- Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China.
| | - Weipeng Lin
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.
- Tea Research Institute, Guangdong Academy of Agricultural Science/Guangdong Key Laboratory of Tea Plant Resources Innovation & Utilization, Guangzhou 510640, China.
| | - Guoping Wang
- College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Kunzheng Cai
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.
- Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China.
| |
Collapse
|
167
|
Schumacher J, Studt L, Tudzynski P. The putative H3K36 demethylase BcKDM1 affects virulence, stress responses and photomorphogenesis in Botrytis cinerea. Fungal Genet Biol 2019; 123:14-24. [DOI: 10.1016/j.fgb.2018.11.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 11/04/2018] [Accepted: 11/09/2018] [Indexed: 12/15/2022]
|
168
|
Wang R, Leng Y, Zhao M, Zhong S. Fine mapping of a dominant gene conferring resistance to spot blotch caused by a new pathotype of Bipolaris sorokiniana in barley. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2019; 132:41-51. [PMID: 30242493 DOI: 10.1007/s00122-018-3192-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 09/13/2018] [Indexed: 06/08/2023]
Abstract
We fine-mapped and physically anchored a dominant gene (Rbs7) conferring resistance to spot blotch caused by a new pathotype of Bipolaris sorokiniana in a genomic interval of 304 kb on barley chromosome 6H. Spot blotch, caused by Bipolaris sorokiniana, is an economically important disease on barley in the Upper Midwest region of the USA and Prairie Provinces of Canada. A new pathotype (pathotype 7, represented by isolate ND4008) of B. sorokiniana has been identified, which is highly virulent on barley cultivars with resistance to other pathotypes of the fungus. In this study, we fine-mapped a dominant gene conferring resistance to pathotype 7 in the barley line PI 235186. Genetic analysis of the F1 and F2 plants from a cross between PI 356741 (highly susceptible to ND4008) and PI 235186 (highly resistant to ND4008) indicated that a single dominant gene (Rbs7) controls the resistance in PI 235186. This result was confirmed by genetic analysis of the F2:3 families and a recombinant inbred line (RIL) population derived from the same cross. Bulked segregant analysis using simple sequence repeat markers localized Rbs7 on the short arm of chromosome 6H. Additional DNA markers were developed from the 6H pseudomolecule sequence of barley cv. Morex and mapped to the genomic region carrying Rbs7 using the RIL population and F2 recombinants derived from the PI 356741 × PI 235186 cross. Rbs7 was fine-mapped between two markers (M13.06 and M13.37), which spans a physical distance of 304 kb on Morex chromosome 6H. These results provide a foundation for future cloning of the resistance gene and development of user-friendly molecular markers that can be used for development of spot-blotch-resistant cultivars in barley breeding programs.
Collapse
Affiliation(s)
- Rui Wang
- Department of Plant Pathology, North Dakota State University, Fargo, ND, 58108, USA
- Department of Plant Sciences, University of Idaho, Aberdeen, ID, 83210, USA
| | - Yueqiang Leng
- Department of Plant Pathology, North Dakota State University, Fargo, ND, 58108, USA
| | - Mingxia Zhao
- Department of Plant Pathology, North Dakota State University, Fargo, ND, 58108, USA
| | - Shaobin Zhong
- Department of Plant Pathology, North Dakota State University, Fargo, ND, 58108, USA.
| |
Collapse
|
169
|
Wang Y, Tan J, Wu Z, VandenLangenberg K, Wehner TC, Wen C, Zheng X, Owens K, Thornton A, Bang HH, Hoeft E, Kraan PAG, Suelmann J, Pan J, Weng Y. STAYGREEN, STAY HEALTHY: a loss-of-susceptibility mutation in the STAYGREEN gene provides durable, broad-spectrum disease resistances for over 50 years of US cucumber production. THE NEW PHYTOLOGIST 2019; 221:415-430. [PMID: 30022503 DOI: 10.1111/nph.15353] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/13/2018] [Indexed: 05/22/2023]
Abstract
The Gy14 cucumber (Cucumis sativus) is resistant to oomyceteous downy mildew (DM), bacterial angular leaf spot (ALS) and fungal anthracnose (AR) pathogens, but the underlying molecular mechanisms are unknown. Quantitative trait locus (QTL) mapping for the disease resistances in Gy14 and further map-based cloning identified a candidate gene for the resistant loci, which was validated and functionally characterized by spatial-temporal gene expression profiling, allelic diversity and phylogenetic analysis, as well as local association studies. We showed that the triple-disease resistances in Gy14 were controlled by the cucumber STAYGREEN (CsSGR) gene. A single nucleotide polymorphism (SNP) in the coding region resulted in a nonsynonymous amino acid substitution in the CsSGR protein, and thus disease resistance. Genes in the chlorophyll degradation pathway showed differential expression between resistant and susceptible lines in response to pathogen inoculation. The causal SNP was significantly associated with disease resistances in natural and breeding populations. The resistance allele has undergone selection in cucumber breeding. The durable, broad-spectrum disease resistance is caused by a loss-of-susceptibility mutation of CsSGR. Probably, this is achieved through the inhibition of reactive oxygen species over-accumulation and phytotoxic catabolite over-buildup in the chlorophyll degradation pathway. The CsSGR-mediated host resistance represents a novel function of this highly conserved gene in plants.
Collapse
Affiliation(s)
- Yuhui Wang
- Horticulture Department, University of Wisconsin, Madison, WI, 53706, USA
| | - Junyi Tan
- Horticulture Department, University of Wisconsin, Madison, WI, 53706, USA
| | - Zhiming Wu
- Horticulture Department, University of Wisconsin, Madison, WI, 53706, USA
- Institute of Cash Crops, Hebei Academy of Agriculture & Forestry Sciences, Shijiazhuang, Hebei, 050051, China
| | - Kyle VandenLangenberg
- Horticultural Science Department, North Carolina State University, Raleigh, NC, 27695, USA
| | - Todd C Wehner
- Horticultural Science Department, North Carolina State University, Raleigh, NC, 27695, USA
| | - Changlong Wen
- Beijing Vegetable Research Center, Beijing Academy of Agricultural and Forestry Sciences, Beijing, 100097, China
| | | | - Ken Owens
- Magnum Seeds Inc., Dixon, CA, 95620, USA
| | | | | | - Eric Hoeft
- HM Clause Seed Company, Davis, CA, 95618, USA
| | | | - Jos Suelmann
- Bayer Vegetable Seeds, 6083 AB, Nunhem, the Netherlands
| | - Junsong Pan
- Horticulture Department, University of Wisconsin, Madison, WI, 53706, USA
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200241, China
| | - Yiqun Weng
- Horticulture Department, University of Wisconsin, Madison, WI, 53706, USA
- USDA-ARS Vegetable Crops Research Unit, Madison, WI, 53705, USA
| |
Collapse
|
170
|
Bianchet C, Wong A, Quaglia M, Alqurashi M, Gehring C, Ntoukakis V, Pasqualini S. An Arabidopsis thaliana leucine-rich repeat protein harbors an adenylyl cyclase catalytic center and affects responses to pathogens. JOURNAL OF PLANT PHYSIOLOGY 2019; 232:12-22. [PMID: 30530199 DOI: 10.1016/j.jplph.2018.10.025] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 10/29/2018] [Accepted: 10/30/2018] [Indexed: 05/21/2023]
Abstract
Adenylyl cyclases (ACs) catalyze the formation of the second messenger cAMP from ATP. Here we report the characterization of an Arabidopsis thaliana leucine-rich repeat (LRR) protein (At3g14460; AtLRRAC1) as an adenylyl cyclase. Using an AC-specific search motif supported by computational assessments of protein models we identify an AC catalytic center within the N-terminus and demonstrate that AtLRRAC1 can generate cAMP in vitro. Knock-out mutants of AtLRRAC1 have compromised immune responses to the biotrophic fungus Golovinomyces orontii and the hemibiotrophic bacteria Pseudomonas syringae, but not against the necrotrophic fungus Botrytis cinerea. These findings are consistent with a role of cAMP-dependent pathways in the defense against biotrophic and hemibiotrophic plant pathogens.
Collapse
Affiliation(s)
- Chantal Bianchet
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Borgo XX giugno, 74, 06121 Perugia, Italy
| | - Aloysius Wong
- College of Science and Technology, Wenzhou-Kean University, 88 Daxue Road, Ouhai, Wenzhou, Zhejiang Province, 325060, China
| | - Mara Quaglia
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX giugno, 74, 06121 Perugia, Italy
| | - May Alqurashi
- Biological and Environmental Sciences and Engineering Division, 4700 King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Chris Gehring
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Borgo XX giugno, 74, 06121 Perugia, Italy; Biological and Environmental Sciences and Engineering Division, 4700 King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Vardis Ntoukakis
- School of Life Sciences, University of Warwick, CV4 7AL, Coventry, UK; Warwick Integrative Synthetic Biology Centre, The University of Warwick, Coventry, CV4 7AL, UK
| | - Stefania Pasqualini
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Borgo XX giugno, 74, 06121 Perugia, Italy.
| |
Collapse
|
171
|
Frías M, González M, González C, Brito N. A 25-Residue Peptide From Botrytis cinerea Xylanase BcXyn11A Elicits Plant Defenses. FRONTIERS IN PLANT SCIENCE 2019; 10:474. [PMID: 31057580 PMCID: PMC6477079 DOI: 10.3389/fpls.2019.00474] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 03/28/2019] [Indexed: 05/20/2023]
Abstract
Plants activate defense responses against a possible pathogen once pattern-recognition receptors (PRRs) perceive the presence of pathogen-associated molecular patterns (PAMPs). Glycosyl hydrolase family 11 (GH11) endoxylanases from Trichoderma, Fusarium and Botrytis species have been described as being able to induce the defense response in plants, in a way that is independent of its enzymatic activity. However, until now, it has not been possible to establish with certainty which regions of these enzymes are recognized by plants as PAMPs. We show here for the first time that a short 25-residue peptide (named Xyn25) from the Botrytis cinerea xylanase BcXyn11A can reproduce by itself all the effects observed for the treatment of plants with the whole BcXyn11A protein. These include necrosis on leaves, seedling growth inhibition, induction of a ROS burst, electrolyte leakage, cytoplasm shrinkage, autofluorescence, cell death, and induction of defense genes. Two highly conserved four-amino acid regions within Xyn25 were shown to be necessary for the elicitation activity by substituting them with tracts of four alanine residues.
Collapse
|
172
|
Zhu Y, Shao J, Zhou Z, Davis RE. Genotype-specific suppression of multiple defense pathways in apple root during infection by Pythium ultimum. HORTICULTURE RESEARCH 2019; 6:10. [PMID: 30603095 PMCID: PMC6312547 DOI: 10.1038/s41438-018-0087-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 09/04/2018] [Accepted: 09/12/2018] [Indexed: 05/21/2023]
Abstract
The genotype-specific defense activation in the roots of perennial tree crops to soilborne necrotrophic pathogens remains largely unknown. A recent phenotyping study indicated that the apple rootstock genotypes B.9 and G.935 have contrasting resistance responses to infection by Pythium ultimum. In the current study, a comparative transcriptome analysis by Illumina Solexa HiSeq 3000 platform was carried out to identify the global transcriptional regulation networks between the susceptible B.9 and the resistant G.935 to P. ultimum infection. Thirty-six libraries were sequenced to cover three timepoints after pathogen inoculation, with three biological replicates for each sample. The transcriptomes in the roots of the susceptible genotype B.9 were reflected by overrepresented differentially expressed genes (DEGs) with downregulated patterns and systematic suppression of cellular processes at 48 h post inoculation (hpi). In contrast, DEGs with annotated functions, such as kinase receptors, MAPK signaling, JA biosynthesis enzymes, transcription factors, and transporters, were readily induced at 24 hpi and continued up-regulation at 48 hpi in G.935 roots. The earlier and stronger defense activation is likely associated with an effective inhibition of necrosis progression in G.935 roots. Lack of effector-triggered immunity or existence of a susceptibility gene could contribute to the severely disturbed transcriptome and susceptibility in B.9 roots. The identified DEGs constitute a valuable resource for hypothesis-driven studies to elucidate the resistance/tolerance mechanisms in apple roots and validating their potential association with resistance traits.
Collapse
Affiliation(s)
- Yanmin Zhu
- USDA-ARS, Tree Fruit Research Laboratory, Wenatchee, WA 98801 USA
| | - Jonathan Shao
- USDA-ARS, Molecular Plant Pathology Laboratory, Beltsville, MD 20705 USA
| | - Zhe Zhou
- Research Institute of Pomology, Chinese Academy of Agricultural Science, Xingcheng, Liaoning 125100 P. R. China
| | - Robert E. Davis
- USDA-ARS, Molecular Plant Pathology Laboratory, Beltsville, MD 20705 USA
| |
Collapse
|
173
|
Liu M, Wu F, Wang S, Lu Y, Chen X, Wang Y, Gu A, Zhao J, Shen S. Comparative transcriptome analysis reveals defense responses against soft rot in Chinese cabbage. HORTICULTURE RESEARCH 2019; 6:68. [PMID: 31231526 PMCID: PMC6544662 DOI: 10.1038/s41438-019-0149-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 03/20/2019] [Accepted: 03/31/2019] [Indexed: 05/20/2023]
Abstract
Pectobacterium carotovorum ssp. carotovorum (Pcc) is a necrotrophic bacterial species that causes soft rot disease in Chinese cabbage. In this study, plants harboring the resistant mutant sr gene, which confers resistance against Pcc, were screened from an 800 M2 population mutated by ethyl methane sulfonate (EMS) and scored in vitro and in vivo for lesion size. The transcript profiles showed ~512 differentially expressed genes (DEGs) between sr and WT plants occurring between 6 and 12 h postinoculation (hpi), which corresponded to the important defense regulation period (resistance) to Pcc in Chinese cabbage. The downstream defense genes (CPK, CML, RBOH MPK3, and MPK4) of pathogen pattern-triggered immunity (PTI) were strongly activated during infection at 12 hpi in resistant mutant sr; PTI appears to be central to plant defense against Pcc via recognition by three putative pattern recognition receptors (PRRs; BrLYM1-BrCERK1, BrBKK1/SERK4-PEPR1, BrWAKs). Pcc triggered the upregulation of the jasmonic acid (JA) and ethylene (ET) biosynthesis genes in mutant sr, but auxins and other hormones may have affected some negative signals. Endogenous hormones (auxins, JAs, and SA), as well as exogenous auxins (MEJA and BTH), were also verified as functioning in the immune system. Concurrently, the expression of glucosinolate and lignin biosynthesis genes was increased at 12 hpi in resistant mutant sr, and the accumulation of glucosinolate and lignin also indicated that these genes have a functional defensive role against Pcc. Our study provides valuable information and elucidates the resistance mechanism of Chinese cabbage against Pcc infection.
Collapse
Affiliation(s)
- Mengyang Liu
- Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, 071000 Baoding, China
| | - Fang Wu
- Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, 071000 Baoding, China
| | - Shan Wang
- Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, 071000 Baoding, China
| | - Yin Lu
- Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, 071000 Baoding, China
| | - Xueping Chen
- Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, 071000 Baoding, China
| | - Yanhua Wang
- Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, 071000 Baoding, China
| | - Aixia Gu
- Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, 071000 Baoding, China
| | - Jianjun Zhao
- Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, 071000 Baoding, China
| | - Shuxing Shen
- Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, 071000 Baoding, China
| |
Collapse
|
174
|
Castillo N, Pastor V, Chávez Á, Arró M, Boronat A, Flors V, Ferrer A, Altabella T. Inactivation of UDP-Glucose Sterol Glucosyltransferases Enhances Arabidopsis Resistance to Botrytis cinerea. FRONTIERS IN PLANT SCIENCE 2019; 10:1162. [PMID: 31611892 PMCID: PMC6776639 DOI: 10.3389/fpls.2019.01162] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Accepted: 08/26/2019] [Indexed: 05/15/2023]
Abstract
Free and glycosylated sterols are both structural components of the plasma membrane that regulate their biophysical properties and consequently different plasma membrane-associated processes such as plant adaptation to stress or signaling. Several reports relate changes in glycosylated sterols levels with the plant response to abiotic stress, but the information about the role of these compounds in the response to biotic stress is scarce. In this work, we have studied the response to the necrotrophic fungus Botrytis cinerea in an Arabidopsis mutant that is severely impaired in steryl glycosides biosynthesis due to the inactivation of the two sterol glucosyltransferases (UGT80A2 and UGT80B1) reported in this plant. This mutant exhibits enhanced resistance against B. cinerea when compared to wild-type plants, which correlates with increased levels of jasmonic acid (JA) and up-regulation of two marker genes (PDF1.2 and PR4) of the ERF branch of the JA signaling pathway. Upon B. cinerea infection, the ugt80A2;B1 double mutant also accumulates higher levels of camalexin, the major Arabidopsis phytoalexin, than wild-type plants. Camalexin accumulation correlates with enhanced transcript levels of several cytochrome P450 camalexin biosynthetic genes, as well as of their transcriptional regulators WRKY33, ANAC042, and MYB51, suggesting that the Botrytis-induced accumulation of camalexin is coordinately regulated at the transcriptional level. After fungus infection, the expression of genes involved in the indole glucosinolate biosynthesis is also up-regulated at a higher degree in the ugt80A2;B1 mutant than in wild-type plants. Altogether, the results of this study show that glycosylated sterols play an important role in the regulation of Arabidopsis response to B. cinerea infection and suggest that this occurs through signaling pathways involving the canonical stress-hormone JA and the tryptophan-derived secondary metabolites camalexin and possibly also indole glucosinolates.
Collapse
Affiliation(s)
- Nidia Castillo
- Plant Metabolism and Metabolic Engineering Program, Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, Spain
| | - Victoria Pastor
- Metabolic Integration and Cell Signalling Group, Plant Physiology Section, Department of Ciencias Agrarias y del Medio Natural, Universitat Jaume I, Castelló, Spain
| | - Ángel Chávez
- Plant Metabolism and Metabolic Engineering Program, Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, Spain
| | - Montserrat Arró
- Plant Metabolism and Metabolic Engineering Program, Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, Spain
- Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain
| | - Albert Boronat
- Plant Metabolism and Metabolic Engineering Program, Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, Spain
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Victor Flors
- Metabolic Integration and Cell Signalling Group, Plant Physiology Section, Department of Ciencias Agrarias y del Medio Natural, Universitat Jaume I, Castelló, Spain
| | - Albert Ferrer
- Plant Metabolism and Metabolic Engineering Program, Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, Spain
- Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain
- *Correspondence: Teresa Altabella, ; Albert Ferrer,
| | - Teresa Altabella
- Plant Metabolism and Metabolic Engineering Program, Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, Spain
- Department of Biology, Healthcare and the Environment, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain
- *Correspondence: Teresa Altabella, ; Albert Ferrer,
| |
Collapse
|
175
|
Wang Z, Ma LY, Cao J, Li YL, Ding LN, Zhu KM, Yang YH, Tan XL. Recent Advances in Mechanisms of Plant Defense to Sclerotinia sclerotiorum. FRONTIERS IN PLANT SCIENCE 2019; 10:1314. [PMID: 31681392 PMCID: PMC6813280 DOI: 10.3389/fpls.2019.01314] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 09/20/2019] [Indexed: 05/20/2023]
Abstract
Sclerotinia sclerotiorum (Lib.) de Bary is an unusual pathogen which has the broad host range, diverse infection modes, and potential double feeding lifestyles of both biotroph and necrotroph. It is capable of infecting over 400 plant species found worldwide and more than 60 names have agriculturally been used to refer to diseases caused by this pathogen. Plant defense to S. sclerotiorum is a complex biological process and exhibits a typical quantitative disease resistance (QDR) response. Recent studies using Arabidopsis thaliana and crop plants have obtained new advances in mechanisms used by plants to cope with S. sclerotiorum infection. In this review, we focused on our current understanding on plant defense mechanisms against this pathogen, and set up a model for the defense process including three stages: recognition of this pathogen, signal transduction and defense response. We also have a particular interest in defense signaling mediated by diverse signaling molecules. We highlight the current challenges and unanswered questions in both the defense process and defense signaling. Essentially, we discussed candidate resistance genes newly mapped by using high-throughput experiments in important crops, and classified these potential gene targets into different stages of the defense process, which will broaden our understanding of the genetic architecture underlying quantitative resistance to S. sclerotiorum. We proposed that more powerful mapping population(s) will be required for accurate and reliable QDR gene identification.
Collapse
|
176
|
Haile ZM, Nagpala-De Guzman EG, Moretto M, Sonego P, Engelen K, Zoli L, Moser C, Baraldi E. Transcriptome Profiles of Strawberry ( Fragaria vesca) Fruit Interacting With Botrytis cinerea at Different Ripening Stages. FRONTIERS IN PLANT SCIENCE 2019; 10:1131. [PMID: 31620156 PMCID: PMC6759788 DOI: 10.3389/fpls.2019.01131] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Accepted: 08/15/2019] [Indexed: 05/04/2023]
Abstract
Gray mold caused by Botrytis cinerea is a major cause of economic losses in strawberry fruit production, limiting fruit shelf life and commercialization. When the fungus infects Fragaria × ananassa strawberry at flowering or unripe fruit stages, symptoms develop after an extended latent phase on ripe fruits before or after harvesting. To elucidate the growth kinetics of B. cinerea on flower/fruit and the molecular responses associated with low susceptibility of unripe fruit stages, woodland strawberry Fragaria vesca flowers and fruits, at unripe white and ripe red stages, were inoculated with B. cinerea. Quantification of fungal genomic DNA within 72 h postinoculation (hpi) showed limited fungal growth on open flower and white fruit, while on red fruit, the growth was exponential starting from 24 hpi and sporulation was observed within 48 hpi. RNA sequencing applied to white and red fruit at 24 hpi showed that a total of 2,141 genes (12.5% of the total expressed genes) were differentially expressed due to B. cinerea infection. A broad transcriptional reprogramming was observed in both unripe and ripe fruits, involving in particular receptor and signaling, secondary metabolites, and defense response pathways. Membrane-localized receptor-like kinases and nucleotide-binding site leucine-rich repeat genes were predominant in the surveillance system of the fruits, most of them being downregulated in white fruits and upregulated in red fruits. In general, unripe fruits exhibited a stronger defense response than red fruits. Genes encoding for pathogenesis-related proteins and flavonoid polyphenols as well as genes involved in cell-wall strengthening were upregulated, while cell-softening genes appeared to be switched off. As a result, B. cinerea remained quiescent in white fruits, while it was able to colonize ripe red fruits.
Collapse
Affiliation(s)
- Zeraye Mehari Haile
- Laboratory of Biotechnology and Plant Pathology, DISTAL, University of Bologna, Bologna, Italy
- Plant Protection Research Division of Melkasa Agricultural Research Center, Ethiopian Institute of Agricultural Research (EIAR), Addis Ababa, Ethiopia
- Genomics and Biology of Fruit Crops Department, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’Adige, Italy
| | | | - Marco Moretto
- Unit of Computational Biology, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’Adige, Italy
| | - Paolo Sonego
- Unit of Computational Biology, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’Adige, Italy
| | - Kristof Engelen
- ESAT-ELECTA, Electrical Energy and Computer Architectures, Leuven, Belgium
| | - Lisa Zoli
- Laboratory of Biotechnology and Plant Pathology, DISTAL, University of Bologna, Bologna, Italy
| | - Claudio Moser
- Genomics and Biology of Fruit Crops Department, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’Adige, Italy
| | - Elena Baraldi
- Laboratory of Biotechnology and Plant Pathology, DISTAL, University of Bologna, Bologna, Italy
- *Correspondence: Elena Baraldi,
| |
Collapse
|
177
|
Yang J, Duan G, Li C, Liu L, Han G, Zhang Y, Wang C. The Crosstalks Between Jasmonic Acid and Other Plant Hormone Signaling Highlight the Involvement of Jasmonic Acid as a Core Component in Plant Response to Biotic and Abiotic Stresses. FRONTIERS IN PLANT SCIENCE 2019; 10:1349. [PMID: 31681397 PMCID: PMC6813250 DOI: 10.3389/fpls.2019.01349] [Citation(s) in RCA: 300] [Impact Index Per Article: 60.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 09/27/2019] [Indexed: 05/19/2023]
Abstract
Plant hormones play central roles in plant growth, developmental processes, and plant response to biotic and abiotic stresses. On the one hand, plant hormones may allocate limited resources to the most serious stresses; on the other hand, the crosstalks among multiple plant hormone signaling regulate the balance between plant growth and defense. Many studies have reported the mechanism of crosstalks between jasmonic acid (JA) and other plant hormones in plant growth and stress responses. Based on these studies, this paper mainly reviews the crosstalks between JA and other plant hormone signaling in regulating the balance between plant growth and defense response. The suppressor proteins JASMONATE ZIM DOMAIN PROTEIN (JAZ) and MYC2 as the key components in the crosstalks are also highlighted in the review. We conclude that JA interacts with other hormone signaling pathways [such as auxin, ethylene (ET), abscisic acid (ABA), salicylic acid (SA), brassinosteroids (BRs), and gibberellin (GA)] to regulate plant growth, abiotic stress tolerance, and defense resistance against hemibiotrophic pathogens such as Magnaporthe oryzae and Pseudomonas syringae. Notably, JA may act as a core signal in the phytohormone signaling network.
Collapse
Affiliation(s)
- Jing Yang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Agro-Biodiversity and Pest Management of the Ministry of Education, Yunnan Agricultural University, Kunming, China
- *Correspondence: Jing Yang,
| | - Guihua Duan
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Agro-Biodiversity and Pest Management of the Ministry of Education, Yunnan Agricultural University, Kunming, China
| | - Chunqin Li
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Agro-Biodiversity and Pest Management of the Ministry of Education, Yunnan Agricultural University, Kunming, China
| | - Lin Liu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Agro-Biodiversity and Pest Management of the Ministry of Education, Yunnan Agricultural University, Kunming, China
| | - Guangyu Han
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Agro-Biodiversity and Pest Management of the Ministry of Education, Yunnan Agricultural University, Kunming, China
| | - Yaling Zhang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Agro-Biodiversity and Pest Management of the Ministry of Education, Yunnan Agricultural University, Kunming, China
| | - Changmi Wang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Agro-Biodiversity and Pest Management of the Ministry of Education, Yunnan Agricultural University, Kunming, China
| |
Collapse
|
178
|
Abstract
The highly conserved catabolic process of autophagy delivers unwanted proteins or damaged organelles to vacuoles for degradation and recycling. This is essential for the regulation of cellular homeostasis, stress adaptation, and programmed cell death in eukaryotes. In particular, emerging evidence indicates that autophagy plays a multifunctional regulatory role in plant innate immunity during plant-pathogen interactions. In this review, we highlight existing knowledge regarding the involvement of autophagy in plant immunity, mechanisms functioning in the induction of autophagy upon pathogen infection, and possible directions for future research.
Collapse
|
179
|
Different Pathogen Defense Strategies in Arabidopsis: More than Pathogen Recognition. Cells 2018; 7:cells7120252. [PMID: 30544557 PMCID: PMC6315839 DOI: 10.3390/cells7120252] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 11/26/2018] [Accepted: 12/03/2018] [Indexed: 01/03/2023] Open
Abstract
Plants constantly suffer from simultaneous infection by multiple pathogens, which can be divided into biotrophic, hemibiotrophic, and necrotrophic pathogens, according to their lifestyles. Many studies have contributed to improving our knowledge of how plants can defend against pathogens, involving different layers of defense mechanisms. In this sense, the review discusses: (1) the functions of PAMP (pathogen-associated molecular pattern)-triggered immunity (PTI) and effector-triggered immunity (ETI), (2) evidence highlighting the functions of salicylic acid (SA) and jasmonic acid (JA)/ethylene (ET)-mediated signaling pathways downstream of PTI and ETI, and (3) other defense aspects, including many novel small molecules that are involved in defense and phenomena, including systemic acquired resistance (SAR) and priming. In particular, we mainly focus on SA and (JA)/ET-mediated signaling pathways. Interactions among them, including synergistic effects and antagonistic effects, are intensively explored. This might be critical to understanding dynamic disease regulation.
Collapse
|
180
|
Heterologous Expression of the Grapevine JAZ7 Gene in Arabidopsis Confers Enhanced Resistance to Powdery Mildew but Not to Botrytis cinerea. Int J Mol Sci 2018; 19:ijms19123889. [PMID: 30563086 PMCID: PMC6321488 DOI: 10.3390/ijms19123889] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 11/25/2018] [Accepted: 11/30/2018] [Indexed: 12/17/2022] Open
Abstract
Jasmonate ZIM-domain (JAZ) family proteins comprise a class of transcriptional repressors that silence jasmonate-inducible genes. Although a considerable amount of research has been carried out on this gene family, there is still very little information available on the role of specific JAZ gene members in multiple pathogen resistance, especially in non-model species. In this study, we investigated the potential resistance function of the VqJAZ7 gene from a disease-resistant wild grapevine, Vitis quinquangularis cv. “Shang-24”, through heterologous expression in Arabidopsis thaliana. VqJAZ7-expressing transgenic Arabidopsis were challenged with three pathogens: the biotrophic fungus Golovinomyces cichoracearum, necrotrophic fungus Botrytis cinerea, and semi-biotrophic bacteria Pseudomonas syringae pv. tomato DC3000. We found that plants expressing VqJAZ7 showed greatly reduced disease symptoms for G. cichoracearum, but not for B. cinerea or P. syringae. In response to G cichoracearum infection, VqJAZ7-expressing transgenic lines exhibited markedly higher levels of cell death, superoxide anions (O2¯, and H2O2 accumulation, relative to nontransgenic control plants. Moreover, we also tested the relative expression of defense-related genes to comprehend the possible induced pathways. Taken together, our results suggest that VqJAZ7 in grapevine participates in molecular pathways of resistance to G. cichoracearum, but not to B. cinerea or P. syringae.
Collapse
|
181
|
Sonawala U, Dinkeloo K, Danna CH, McDowell JM, Pilot G. Review: Functional linkages between amino acid transporters and plant responses to pathogens. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 277:79-88. [PMID: 30466603 DOI: 10.1016/j.plantsci.2018.09.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 08/11/2018] [Accepted: 09/12/2018] [Indexed: 06/09/2023]
Abstract
Upon infection, plant pathogens become dependent on their hosts for nutrition. Therefore, the interaction between the two organisms is tightly linked to the availability and flux of nutrients in the plant. The plant's nitrogen metabolism is reprogrammed during pathogen attack, likely reflecting plant's response to invasion by the pathogen and active modification by the pathogen to promote feeding. Several lines of evidence indicate that plant-derived amino acids are an important source of nitrogen for diverse pathogens. Moreover, amino acid homeostasis is interconnected with the plant's immune signaling pathways. Here, we critically examine the knowns and unknowns about connections between plant-encoded amino acid transporters and resistance or susceptibility to pathogens and pests. We use recent insights into sugar transporters to frame a perspective with potential applicability to amino acids and other nutrients. We emphasize different approaches that have provided insight in this topic and we conclude with suggestions to fill gaps in foundational knowledge and explore new avenues for disease control.
Collapse
Affiliation(s)
- Unnati Sonawala
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, 24060 VA, USA
| | - Kasia Dinkeloo
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, 24060 VA, USA
| | - Cristian H Danna
- Department of Biology, University of Virginia, Charlottesville, VA, USA
| | - John M McDowell
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, 24060 VA, USA.
| | - Guillaume Pilot
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, 24060 VA, USA.
| |
Collapse
|
182
|
Su Y, Li HG, Wang Y, Li S, Wang HL, Yu L, He F, Yang Y, Feng CH, Shuai P, Liu C, Yin W, Xia X. Poplar miR472a targeting NBS-LRRs is involved in effective defence against the necrotrophic fungus Cytospora chrysosperma. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:5519-5530. [PMID: 30124931 DOI: 10.1093/jxb/ery304] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 08/09/2018] [Indexed: 05/22/2023]
Abstract
The hemibiotroph Colletotrichum gloeosporioides and the necrotroph Cytospora chrysosperma cause poplar foliage and stem disease, respectively, resulting in substantial economic losses. In this study, Populus trichocarpa ptc-miR472a was down-regulated in leaves treated with salicylic acid, jasmonic acid (JA) or bacterial flagellin (flg22). Here, ptc-miR472a and a short tandem target mimic (STTM) of miR472a were overexpressed in P. alba × P. glandulosa, and overexpression lines of miR472a and silenced lines of STTM472a were generated. Compared with the STTM472a and wild type lines, lower reactive oxygen species accumulation was detected in miR472a overexpressing plants treated with flg22, C. gloeosporioides or C. chrysosperma. In addition, the miR472a overexpressing lines exhibited the highest susceptibility to the hemibiotroph, C. gloeosporioides, but the highest effective defence response to the necrotroph, C. chrysosperma. The JA/ethylene marker gene ERF1 was rapidly up-regulated in miR472a overexpressing plants. Furthermore, five phased, secondary, small interfering RNAs (phasiRNAs) were confirmed in the miR472a overexpressing and STTM472a lines, triggering phasiRNAs predicted to enhance NBS-LRR silencing. Taken together, our results revealed that ptc-miR472a exerts a key role in plant immunity to C. gloeosporioides and C. chrysosperma by targeting NBS-LRR transcripts. This study provides a new strategy and method in plant breeding to improve plant disease resistance.
Collapse
Affiliation(s)
- Yanyan Su
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, National Engineering Laboratory of Tree Breeding, Beijing Forestry University, Beijing, China
| | - Hui-Guang Li
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, National Engineering Laboratory of Tree Breeding, Beijing Forestry University, Beijing, China
| | - Yonglin Wang
- College of Forestry, Beijing Forestry University, Beijing, China
| | - Shuang Li
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, National Engineering Laboratory of Tree Breeding, Beijing Forestry University, Beijing, China
| | - Hou-Ling Wang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, National Engineering Laboratory of Tree Breeding, Beijing Forestry University, Beijing, China
| | - Lu Yu
- College of Forestry, Beijing Forestry University, Beijing, China
| | - Fang He
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, National Engineering Laboratory of Tree Breeding, Beijing Forestry University, Beijing, China
| | - Yanli Yang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, National Engineering Laboratory of Tree Breeding, Beijing Forestry University, Beijing, China
| | - Cong-Hua Feng
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, National Engineering Laboratory of Tree Breeding, Beijing Forestry University, Beijing, China
| | - Peng Shuai
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, National Engineering Laboratory of Tree Breeding, Beijing Forestry University, Beijing, China
| | - Chao Liu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, National Engineering Laboratory of Tree Breeding, Beijing Forestry University, Beijing, China
| | - Weilun Yin
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, National Engineering Laboratory of Tree Breeding, Beijing Forestry University, Beijing, China
| | - Xinli Xia
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, National Engineering Laboratory of Tree Breeding, Beijing Forestry University, Beijing, China
| |
Collapse
|
183
|
Yu Y, Shi J, Li X, Liu J, Geng Q, Shi H, Ke Y, Sun Q. Transcriptome analysis reveals the molecular mechanisms of the defense response to gray leaf spot disease in maize. BMC Genomics 2018; 19:742. [PMID: 30305015 PMCID: PMC6180411 DOI: 10.1186/s12864-018-5072-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Accepted: 09/11/2018] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Gray leaf spot (GLS), which is caused by the necrotrophic fungi Cercospora zeae-maydis and Cercospora zeina, is one of the most impactful diseases in maize worldwide. The aim of the present study is to identify the resistance genes and understand the molecular mechanisms for GLS resistance. RESULTS Two cultivars, 'Yayu889' and 'Zhenghong532,' which are distinguished as resistant and susceptible cultivars, respectively, were challenged with the GLS disease and a RNA-seq experiment was conducted on infected plants at 81, 89, 91, and 93 days post planting (dap). Compared with the beginning stage at 81 dap, 4666, 1733, and 1166 differentially expressed genes (DEGs) were identified at 89, 91, and 93 dap, respectively, in 'Yayu889,' while relatively fewer, i.e., 4713, 881, and 722 DEGs, were identified in 'Zhenghong532.' Multiple pathways involved in the response of maize to GLS, including 'response to salicylic acid,' 'protein phosphorylation,' 'oxidation-reduction process,' and 'carotenoid biosynthetic process,' were enriched by combining differential expression analysis and Weighted Gene Co-expression Network Analysis (WGCNA). The expression of 12 candidate resistance proteins in these pathways were quantified by the multiple reaction monitoring (MRM) method. This approach identified two candidate resistance proteins, a calmodulin-like protein and a leucine-rich repeat receptor-like protein kinase with SNPs that were located in QTL regions for GLS resistance. Metabolic analysis showed that, compared with 'Zhenghong532,' the amount of salicylic acid (SA) and total carotenoids in 'Yayu889' increased, while peroxidase activity decreased during the early infection stages, suggesting that increased levels of SA, carotenoids, and reactive oxygen species (ROS) may enhance the defense response of 'Yayu889' to GLS. CONCLUSION By combining transcriptome and proteome analyses with comparisons of resistance QTL regions, calmodulin-like protein and leucine-rich repeat receptor-like protein kinase were identified as candidate GLS resistance proteins. Moreover, we found that the metabolic pathways for ROS, SA, and carotenoids are especially active in the resistant cultivar. These findings could lead to a better understanding of the GLS resistance mechanisms and facilitate the breeding of GLS-resistant maize cultivars.
Collapse
Affiliation(s)
- Yang Yu
- Key Laboratory of Bio-resources and Eco-environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, People’s Republic of China
| | - Jianyang Shi
- Key Laboratory of Bio-resources and Eco-environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, People’s Republic of China
| | - Xiyang Li
- Key Laboratory of Bio-resources and Eco-environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, People’s Republic of China
| | - Jian Liu
- Key Laboratory of Bio-resources and Eco-environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, People’s Republic of China
| | - Qi Geng
- Key Laboratory of Bio-resources and Eco-environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, People’s Republic of China
| | - Haichun Shi
- Agronomy College, Sichuan Agriculture University, Chengdu, Sichuan People’s Republic of China
| | - Yongpei Ke
- Agronomy College, Sichuan Agriculture University, Chengdu, Sichuan People’s Republic of China
| | - Qun Sun
- Key Laboratory of Bio-resources and Eco-environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, People’s Republic of China
| |
Collapse
|
184
|
Liang X, Rollins JA. Mechanisms of Broad Host Range Necrotrophic Pathogenesis in Sclerotinia sclerotiorum. PHYTOPATHOLOGY 2018; 108:1128-1140. [PMID: 30048598 DOI: 10.1094/phyto-06-18-0197-rvw] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Among necrotrophic fungi, Sclerotinia sclerotiorum is remarkable for its extremely broad host range and for its aggressive host tissue colonization. With full genome sequencing, transcriptomic analyses and the increasing pace of functional gene characterization, the factors underlying the basis of this broad host range necrotrophic pathogenesis are now being elucidated at a greater pace. Among these, genes have been characterized that are required for infection via compound appressoria in addition to genes associated with colonization that regulate oxalic acid (OA) production and OA catabolism. Moreover, virulence-related secretory proteins have been identified, among which are candidates for manipulating host activities apoplastically and cytoplasmically. Coupled with these mechanistic studies, cytological observations of the colonization process have blurred the heretofore clear-cut biotroph versus necrotroph boundary. In this review, we reexamine the cytology of S. sclerotiorum infection and put more recent molecular and genomic data into the context of this cytology. We propose a two-phase infection model in which the pathogen first evades, counteracts and subverts host basal defense reactions prior to killing and degrading host cells. Spatially, the pathogen may achieve this via the production of compatibility factors/effectors in compound appressoria, bulbous subcuticular hyphae, and primary invasive hyphae. By examining the nuances of this interaction, we hope to illuminate new classes of factors as targets to improve our understanding of broad host range necrotrophic pathogens and provide the basis for understanding corresponding host resistance.
Collapse
Affiliation(s)
- Xiaofei Liang
- First author: State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University; and second author: Department of Plant Pathology, University of Florida, P.O. Box 110680, Gainesville 32611-0680
| | - Jeffrey A Rollins
- First author: State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University; and second author: Department of Plant Pathology, University of Florida, P.O. Box 110680, Gainesville 32611-0680
| |
Collapse
|
185
|
Sari E, Bhadauria V, Ramsay L, Borhan MH, Lichtenzveig J, Bett KE, Vandenberg A, Banniza S. Defense responses of lentil (Lens culinaris) genotypes carrying non-allelic ascochyta blight resistance genes to Ascochyta lentis infection. PLoS One 2018; 13:e0204124. [PMID: 30235263 PMCID: PMC6147436 DOI: 10.1371/journal.pone.0204124] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 09/03/2018] [Indexed: 12/24/2022] Open
Abstract
Ascochyta blight of lentil is an important fungal disease in many lentil-producing regions of the world causing major yield and grain quality losses. Quick shifts in aggressiveness of the population of the causal agent Ascochyta lentis mandates developing germplasm with novel and durable resistance. In the absence of complete resistance, lentil genotypes CDC Robin and 964a-46 have frequently been used as sources of partial resistance to ascochyta blight and carry non-allelic ascochyta blight resistance genes. RNA-seq analysis was conducted to identify differences in the transcriptome of CDC Robin, 964a-46 and the susceptible check Eston after inoculation with A. lentis. Candidate defense genes differentially expressed among the genotypes had hypothetical functions in various layers of plant defense, including pathogen recognition, phytohormone signaling pathways and downstream defense responses. CDC Robin and 964a-46 activated cell surface receptors (e.g. receptor like kinases) tentatively associated with pathogen-associated molecular patterns (PAMP) recognition and nucleotide-binding site leucine-rich repeat (NBS-LRR) receptors associated with intracellular effector recognition upon A. lentis infection, and differed in their activation of salicylic acid, abscisic acid and jasmonic acid / ethylene signal transduction pathways. These differences were reflected in the differential expression of downstream defense responses such as pathogenesis-related proteins, and genes associated with the induction of cell death and cell-wall reinforcement. A significant correlation between expression levels of a selection of genes based on quantitative real-time PCR and their expression levels estimated through RNA-seq demonstrated the technical and analytical accuracy of RNA-seq for identification of genes differentially expressed among genotypes. The presence of different resistance mechanisms in 964a-46 and CDC Robin indicates their value for pyramiding gene leading to more durable resistance to ascochyta blight.
Collapse
Affiliation(s)
- Ehsan Sari
- Department of Plant Sciences/Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Vijai Bhadauria
- Department of Plant Sciences/Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Larissa Ramsay
- Department of Plant Sciences/Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - M. Hossein Borhan
- Agriculture and Agri-Food Canada, Saskatoon Research and Development Centre, Saskatoon, Saskatchewan, Canada
| | - Judith Lichtenzveig
- School of Agriculture and Environment, University of Western Australia, Perth, Western Australia, Australia
| | - Kirstin E. Bett
- Department of Plant Sciences/Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Albert Vandenberg
- Department of Plant Sciences/Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Sabine Banniza
- Department of Plant Sciences/Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- * E-mail:
| |
Collapse
|
186
|
Visser EA, Wegrzyn JL, Myburg AA, Naidoo S. Defence transcriptome assembly and pathogenesis related gene family analysis in Pinus tecunumanii (low elevation). BMC Genomics 2018; 19:632. [PMID: 30139335 PMCID: PMC6108113 DOI: 10.1186/s12864-018-5015-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 08/14/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Fusarium circinatum is a pressing threat to the cultivation of many economically important pine tree species. Efforts to develop effective disease management strategies can be aided by investigating the molecular mechanisms involved in the host-pathogen interaction between F. circinatum and pine species. Pinus tecunumanii and Pinus patula are two closely related tropical pine species that differ widely in their resistance to F. circinatum challenge, being resistant and susceptible respectively, providing the potential for a useful pathosystem to investigate the molecular responses underlying resistance to F. circinatum. However, no genomic resources are available for P. tecunumanii. Pathogenesis-related proteins are classes of proteins that play important roles in plant-microbe interactions, e.g. chitinases; proteins that break down the major structural component of fungal cell walls. Generating a reference sequence for P. tecunumanii and characterizing pathogenesis related gene families in these two pine species is an important step towards unravelling the pine-F. circinatum interaction. RESULTS Eight reference based and 12 de novo assembled transcriptomes were produced, for juvenile shoot tissue from both species. EvidentialGene pipeline redundancy reduction, expression filtering, protein clustering and taxonomic filtering produced a 50 Mb shoot transcriptome consisting of 28,621 contigs for P. tecunumanii and a 72 Mb shoot transcriptome consisting of 52,735 contigs for P. patula. Predicted protein sequences encoded by the assembled transcriptomes were clustered with reference proteomes from 92 other species to identify pathogenesis related gene families in P. patula, P. tecunumanii and other pine species. CONCLUSIONS The P. tecunumanii transcriptome is the first gene catalogue for the species, representing an important resource for studying resistance to the pitch canker pathogen, F. circinatum. This study also constitutes, to our knowledge, the largest index of gymnosperm PR-genes to date.
Collapse
Affiliation(s)
- Erik A. Visser
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Private bag X20, Pretoria, 0028 South Africa
| | - Jill L. Wegrzyn
- Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT 06269 USA
| | - Alexander A. Myburg
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Private bag X20, Pretoria, 0028 South Africa
| | - Sanushka Naidoo
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Private bag X20, Pretoria, 0028 South Africa
| |
Collapse
|
187
|
Duran-Flores D, Heil M. Extracellular self-DNA as a damage-associated molecular pattern (DAMP) that triggers self-specific immunity induction in plants. Brain Behav Immun 2018; 72:78-88. [PMID: 29042243 DOI: 10.1016/j.bbi.2017.10.010] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 10/04/2017] [Accepted: 10/13/2017] [Indexed: 12/14/2022] Open
Abstract
Mammals sense self or non-self extracellular or extranuclear DNA fragments (hereinafter collectively termed eDNA) as indicators of injury or infection and respond with immunity. We hypothesised that eDNA acts as a damage-associated molecular pattern (DAMP) also in plants and that it contributes to self versus non-self discrimination. Treating plants and suspension-cultured cells of common bean (Phaseolus vulgaris) with fragmented self eDNA (obtained from other plants of the same species) induced early, immunity-related signalling responses such as H2O2 generation and MAPK activation, decreased the infection by a bacterial pathogen (Pseudomonas syringae) and increased an indirect defence to herbivores (extrafloral nectar secretion). By contrast, non-self DNA (obtained from lima bean, Phaseolus lunatus, and Acacia farnesiana) had significantly lower or no detectable effects. Only fragments below a size of 700 bp were active, and treating the eDNA preparation DNAse abolished its inducing effects, whereas treatment with RNAse or proteinase had no detectable effect. These findings indicate that DNA fragments, rather than small RNAs, single nucleotides or proteins, accounted for the observed effects. We suggest that eDNA functions a DAMP in plants and that plants discriminate self from non-self at a species-specific level. The immune systems of plants and mammals share multiple central elements, but further work will be required to understand the mechanisms and the selective benefits of an immunity response that is triggered by eDNA in a species-specific manner.
Collapse
Affiliation(s)
- Dalia Duran-Flores
- Departamento de Ingeniería Genética, CINVESTAV-Irapuato, Irapuato, Guanajuato, Mexico
| | - Martin Heil
- Departamento de Ingeniería Genética, CINVESTAV-Irapuato, Irapuato, Guanajuato, Mexico.
| |
Collapse
|
188
|
Cui Y, Jiang J, Yang H, Zhao T, Xu X, Li J. Virus-induced gene silencing (VIGS) of the NBS-LRR gene SLNLC1 compromises Sm-mediated disease resistance to Stemphylium lycopersici in tomato. Biochem Biophys Res Commun 2018; 503:1524-1529. [PMID: 30037434 DOI: 10.1016/j.bbrc.2018.07.074] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Accepted: 07/16/2018] [Indexed: 01/16/2023]
Abstract
In a previous study, when resistant tomato plants (cv. Motelle) carrying the Sm gene were challenged with S. lycopersici, the SLNLC1 gene was significantly upregulated. In this study, to verify the function of the SLNLC1 gene response to disease resistance against S. lycopersici, virus-induced gene silencing (VIGS) was used to downregulate the expression level of the SLNLC1 gene in resistant tomato plants inoculated with S. lycopersici. After inoculation with S. lycopersici, a susceptible phenotype was observed in the silenced SLNLC1-resistant plants. Through microscopy, impaired hypersensitive response (HR) and decreased ROS accumulation were also observed in the silenced SLNLC1 plants. In addition, the production of lignin and callose were decreased in the silenced SLNLC1 plants. Taken together, these results indicated that silencing the SLNLC1 gene attenuated the resistance of tomato plants resistant to S. lycopersici.
Collapse
Affiliation(s)
- Yanan Cui
- School of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China.
| | - Jingbin Jiang
- School of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China.
| | - Huanhuan Yang
- School of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China.
| | - Tingting Zhao
- School of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China.
| | - Xiangyang Xu
- School of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China.
| | - Jingfu Li
- School of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China.
| |
Collapse
|
189
|
Wei H, Collmer A. Defining essential processes in plant pathogenesis with Pseudomonas syringae pv. tomato DC3000 disarmed polymutants and a subset of key type III effectors. MOLECULAR PLANT PATHOLOGY 2018; 19:1779-1794. [PMID: 29277959 PMCID: PMC6638048 DOI: 10.1111/mpp.12655] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 11/10/2017] [Accepted: 12/20/2017] [Indexed: 05/22/2023]
Abstract
Pseudomonas syringae pv. tomato DC3000 and its derivatives cause disease in tomato, Arabidopsis and Nicotiana benthamiana. The primary virulence factors include a repertoire of 29 effector proteins injected into plant cells by the type III secretion system and the phytotoxin coronatine. The complete repertoire of effector genes and key coronatine biosynthesis genes have been progressively deleted and minimally reassembled to reconstitute basic pathogenic ability in N. benthamiana, and in Arabidopsis plants that have mutations in target genes that mimic effector actions. This approach and molecular studies of effector activities and plant immune system targets have highlighted a small subset of effectors that contribute to essential processes in pathogenesis. Most notably, HopM1 and AvrE1 redundantly promote an aqueous apoplastic environment, and AvrPtoB and AvrPto redundantly block early immune responses, two conditions that are sufficient for substantial bacterial growth in planta. In addition, disarmed DC3000 polymutants have been used to identify the individual effectors responsible for specific activities of the complete repertoire and to more effectively study effector domains, effector interplay and effector actions on host targets. Such work has revealed that AvrPtoB suppresses cell death elicitation in N. benthamiana that is triggered by another effector in the DC3000 repertoire, highlighting an important aspect of effector interplay in native repertoires. Disarmed DC3000 polymutants support the natural delivery of test effectors and infection readouts that more accurately reveal effector functions in key pathogenesis processes, and enable the identification of effectors with similar activities from a broad range of other pathogens that also defeat plants with cytoplasmic effectors.
Collapse
Affiliation(s)
- Hai‐Lei Wei
- School of Integrative Plant ScienceSection of Plant Pathology and Plant–Microbe Biology, Cornell UniversityIthacaNY14853USA
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of AgricultureInstitute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural SciencesBeijing100081China
| | - Alan Collmer
- School of Integrative Plant ScienceSection of Plant Pathology and Plant–Microbe Biology, Cornell UniversityIthacaNY14853USA
| |
Collapse
|
190
|
Tugizimana F, Mhlongo MI, Piater LA, Dubery IA. Metabolomics in Plant Priming Research: The Way Forward? Int J Mol Sci 2018; 19:ijms19061759. [PMID: 29899301 PMCID: PMC6032392 DOI: 10.3390/ijms19061759] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/02/2018] [Accepted: 06/04/2018] [Indexed: 12/26/2022] Open
Abstract
A new era of plant biochemistry at the systems level is emerging, providing detailed descriptions of biochemical phenomena at the cellular and organismal level. This new era is marked by the advent of metabolomics—the qualitative and quantitative investigation of the entire metabolome (in a dynamic equilibrium) of a biological system. This field has developed as an indispensable methodological approach to study cellular biochemistry at a global level. For protection and survival in a constantly-changing environment, plants rely on a complex and multi-layered innate immune system. This involves surveillance of ‘self’ and ‘non-self,’ molecule-based systemic signalling and metabolic adaptations involving primary and secondary metabolites as well as epigenetic modulation mechanisms. Establishment of a pre-conditioned or primed state can sensitise or enhance aspects of innate immunity for faster and stronger responses. Comprehensive elucidation of the molecular and biochemical processes associated with the phenotypic defence state is vital for a better understanding of the molecular mechanisms that define the metabolism of plant–pathogen interactions. Such insights are essential for translational research and applications. Thus, this review highlights the prospects of metabolomics and addresses current challenges that hinder the realisation of the full potential of the field. Such limitations include partial coverage of the metabolome and maximising the value of metabolomics data (extraction of information and interpretation). Furthermore, the review points out key features that characterise both the plant innate immune system and enhancement of the latter, thus underlining insights from metabolomic studies in plant priming. Future perspectives in this inspiring area are included, with the aim of stimulating further studies leading to a better understanding of plant immunity at the metabolome level.
Collapse
Affiliation(s)
- Fidele Tugizimana
- Department of Biochemistry, Research Centre for Plant Metabolomics, University of Johannesburg, Auckland Park 2006, South Africa.
| | - Msizi I Mhlongo
- Department of Biochemistry, Research Centre for Plant Metabolomics, University of Johannesburg, Auckland Park 2006, South Africa.
| | - Lizelle A Piater
- Department of Biochemistry, Research Centre for Plant Metabolomics, University of Johannesburg, Auckland Park 2006, South Africa.
| | - Ian A Dubery
- Department of Biochemistry, Research Centre for Plant Metabolomics, University of Johannesburg, Auckland Park 2006, South Africa.
| |
Collapse
|
191
|
Yang C, Liang Y, Qiu D, Zeng H, Yuan J, Yang X. Lignin metabolism involves Botrytis cinerea BcGs1- induced defense response in tomato. BMC PLANT BIOLOGY 2018; 18:103. [PMID: 29866036 DOI: 10.1186/s12870-018-1319-1310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 05/24/2018] [Indexed: 05/19/2023]
Abstract
BACKGROUND BcGs1, a cell wall-degrading enzyme (CWDE), was originally derived from Botrytis cinerea. Our previous study revealed that BcGs1 could trigger defense responses and protect plants against various pathogens. We researched the defense response mechanism underlying this BcGs1 elicitation in tomato. RESULTS We revealed that the two domains were required for BcGs1's full necrosis activity. According to analysis and quantitative real-time PCR of the up-regulated proteins and genes filtered by iTRAQ-based quantitative proteome approach, oxidative metabolism and phenylpropanoid metabolism were speculated to be involved in BcGs1-triggered defense response in tomato. Furthermore, experimental evidence showed that BcGs1 triggered reactive oxygen species (ROS) burst and increased the level of phenylalanine-ammonia lyase (PAL) and peroxidase (POD) enzyme activity, as well as lignin accumulation. Moreover, histochemical analysis revealed that infiltration of BcGs1 in tomato leaves exhibited cell wall thickening compared with untreated plants. CONCLUSIONS The results suggested that BcGs1 activated the basal defense response included lignin metabolism contributed to BcGs1-induced resistance to Botrytis. cinerea infection in tomato.
Collapse
Affiliation(s)
- Chenyu Yang
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081, China
| | - Yingbo Liang
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081, China
| | - Dewen Qiu
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081, China
| | - Hongmei Zeng
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081, China
| | - Jingjing Yuan
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081, China
| | - Xiufen Yang
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081, China.
| |
Collapse
|
192
|
Yang C, Liang Y, Qiu D, Zeng H, Yuan J, Yang X. Lignin metabolism involves Botrytis cinerea BcGs1- induced defense response in tomato. BMC PLANT BIOLOGY 2018; 18:103. [PMID: 29866036 PMCID: PMC5987389 DOI: 10.1186/s12870-018-1319-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 05/24/2018] [Indexed: 05/13/2023]
Abstract
BACKGROUND BcGs1, a cell wall-degrading enzyme (CWDE), was originally derived from Botrytis cinerea. Our previous study revealed that BcGs1 could trigger defense responses and protect plants against various pathogens. We researched the defense response mechanism underlying this BcGs1 elicitation in tomato. RESULTS We revealed that the two domains were required for BcGs1's full necrosis activity. According to analysis and quantitative real-time PCR of the up-regulated proteins and genes filtered by iTRAQ-based quantitative proteome approach, oxidative metabolism and phenylpropanoid metabolism were speculated to be involved in BcGs1-triggered defense response in tomato. Furthermore, experimental evidence showed that BcGs1 triggered reactive oxygen species (ROS) burst and increased the level of phenylalanine-ammonia lyase (PAL) and peroxidase (POD) enzyme activity, as well as lignin accumulation. Moreover, histochemical analysis revealed that infiltration of BcGs1 in tomato leaves exhibited cell wall thickening compared with untreated plants. CONCLUSIONS The results suggested that BcGs1 activated the basal defense response included lignin metabolism contributed to BcGs1-induced resistance to Botrytis. cinerea infection in tomato.
Collapse
Affiliation(s)
- Chenyu Yang
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081 China
| | - Yingbo Liang
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081 China
| | - Dewen Qiu
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081 China
| | - Hongmei Zeng
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081 China
| | - Jingjing Yuan
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081 China
| | - Xiufen Yang
- The State Key Laboratory for Biology of Plant Disease and Insect Pests/ Key Laboratory of Control of Biological Hazard Factors (Plant Origin) for Agri-product Quality and Safety, Ministry of Agriculture Institute of Plant protection, Chinese Academy of Agricultural science, No. 12 Zhong-guan-cun South Street, Beijing, 100081 China
| |
Collapse
|
193
|
Wang Z, Wan L, Xin Q, Chen Y, Zhang X, Dong F, Hong D, Yang G. Overexpression of OsPGIP2 confers Sclerotinia sclerotiorum resistance in Brassica napus through increased activation of defense mechanisms. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:3141-3155. [PMID: 29648614 PMCID: PMC5972623 DOI: 10.1093/jxb/ery138] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 03/31/2018] [Indexed: 05/07/2023]
Abstract
Sclerotinia stem rot (SSR), caused by Sclerotinia sclerotiorum, is the most serious disease affecting the yield of the agriculturally and economically important crop Brassica napus (rapeseed). In this study, Oryza sativa polygalacturonase-inhibiting protein 2 (OsPGIP2) was found to effectively enhanced rapeseed immunity against S. sclerotiorum infection. Leaf extracts of B. napus plants overexpressing OsPGIP2 showed enhanced S. sclerotiorum resistance by delaying pathogen infection. The constitutive expression of OsPGIP2 in rapeseed plants provided a rapid and effective defense response, which included the production of reactive oxygen species, interactions with S. sclerotiorum polygalacturonases (SsPG3 and SsPG6), and effects on the expression of defense genes. RNA sequencing analysis revealed that the pathogen induced many differentially expressed genes associated with pathogen recognition, redox homeostasis, mitogen-activated protein kinase signaling cascades, hormone signaling pathways, pathogen-/defense-related genes, and cell wall-related genes. The overexpression of OsPGIP2 also led to constitutively increased cell wall cellulose and hemicellulose contents in stems without compromising seed quality. The results demonstrate that OsPGIP2 plays a major role in rapeseed defense mechanisms, and we propose a model for OsPGIP2-conferred resistance to S. sclerotiorum in these plants.
Collapse
Affiliation(s)
- Zhuanrong Wang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Lili Wan
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, China
- Institute of Crop, Wuhan Academy of Agricultural Sciences, Wuhan, Hubei, China
| | - Qiang Xin
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Ye Chen
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Xiaohui Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Faming Dong
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Dengfeng Hong
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Guangsheng Yang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, China
| |
Collapse
|
194
|
Monazzah M, Rabiei Z, Enferadi ST. The Effect of Oxalic Acid, the Pathogenicity Factor of Sclerotinia Sclerotiorum on the Two Susceptible and Moderately Resistant Lines of Sunflower. IRANIAN JOURNAL OF BIOTECHNOLOGY 2018; 16:e1832. [PMID: 30555843 PMCID: PMC6217266 DOI: 10.21859/ijb.1832] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 11/05/2017] [Accepted: 12/09/2017] [Indexed: 12/31/2022]
Abstract
Background One of the main sunflower diseases is the white mold Sclerotinia sclerotiorum. The oxalic acid (OA), which is one of the main pathogenicity factors of this fungus, beside the direct toxicity on the host, has other functions such as the disruption of the cell wall and chelating out the calcium ions. Objectives Regarding the importance of this disease, it is important to study the reactions of the plant against OA which is a nonspecific toxin of many other necrotrophic fungi. Materials and Methods In this study, two susceptible and moderately resistant sunflower lines were inoculated with OA and samples at the first leaf stage were collected within the intervals of 2, 6, 12 and 24 hours post inoculation. The expression of five genes related to tricarboxylic acid cycle, including citrate synthase, fumarase, iso-citrate lyase, malate synthase and malate dehydrogenase was studied under OA treatment. Results Two hours after the inoculation, no significant change was observed in the expression of the five studied genes in the moderately resistant line. The iso-citrate lyase gene, which is related to glyoxylate cycle (a variation of the tricarboxylic acid cycle), showed no change in the moderately resistant line; however, it showed an increase in the susceptible line. The increase in fumarase gene expression in moderately resistant line was higher than the susceptible line. The result showed the activation of glyoxylate cycle and destruction of fatty acids in the susceptible line. Conclusions Activation of glyoxylate cycle indicated induction of senescent symptoms by OA in susceptible line. Increasing in H2O2 leads to oxidative burst and cell death. Cell death has an apparent benefit for development and growth of necrotrophic pathogens in the plant cells. The study of resistance mechanisms in response to the pathogen is useful for breeding programs to provide lines with higher resistance to this pathogen.
Collapse
Affiliation(s)
- Maryam Monazzah
- Department of Plant Pathology, Faculty of Agriculture, Bu-Ali Sina University, Mahdyeh Street, 65175/4161, Hamedan, Iran
| | - Zohreh Rabiei
- Department of Animal Biotechnology, Faculty of Agricultural Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran Tehran, Iran
| | - Sattar Tahmasebi Enferadi
- Department of Molecular Plant Biotechnology, Faculty of Agricultural Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| |
Collapse
|
195
|
Ma X, Keller B, McDonald BA, Palma-Guerrero J, Wicker T. Comparative Transcriptomics Reveals How Wheat Responds to Infection by Zymoseptoria tritici. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2018; 31:420-431. [PMID: 29090630 DOI: 10.1094/mpmi-10-17-0245-r] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The fungus Zymoseptoria tritici causes septoria tritici blotch (STB) on wheat, an important disease globally and the most damaging wheat disease in Europe. Despite the global significance of STB, the molecular basis of wheat defense against Z. tritici is poorly understood. Here, we use a comparative transcriptomic study to investigate how wheat responds to infection by four distinct strains of Z. tritici. We examined the response of wheat across the entire infection cycle, identifying both shared responses to the four strains and strain-specific responses. We found that the early asymptomatic phase is characterized by strong upregulation of genes encoding receptor-like kinases and pathogenesis-related proteins, indicating the onset of a defense response. We also identified genes that were differentially expressed among the four fungal strains, including genes related to defense. Genes involved in senescence were induced during both the asymptomatic phase and at late stages of infection, suggesting manipulation of senescence processes by both the plant and the pathogen. Our findings illustrate the need, when identifying important genes affecting disease resistance in plants, to include multiple pathogen strains.
Collapse
Affiliation(s)
- Xin Ma
- 1 Plant Pathology, Institute of Integrative Biology, ETH Zurich, 8092 Zurich, Switzerland; and
- 2 Department of Plant and Microbial Biology, University of Zurich, Zurich 8008, Switzerland
| | - Beat Keller
- 2 Department of Plant and Microbial Biology, University of Zurich, Zurich 8008, Switzerland
| | - Bruce A McDonald
- 1 Plant Pathology, Institute of Integrative Biology, ETH Zurich, 8092 Zurich, Switzerland; and
| | - Javier Palma-Guerrero
- 1 Plant Pathology, Institute of Integrative Biology, ETH Zurich, 8092 Zurich, Switzerland; and
| | - Thomas Wicker
- 2 Department of Plant and Microbial Biology, University of Zurich, Zurich 8008, Switzerland
| |
Collapse
|
196
|
D'Ambrosio JM, Gonorazky G, Sueldo DJ, Moraga J, Di Palma AA, Lamattina L, Collado IG, Laxalt AM. The sesquiterpene botrydial from Botrytis cinerea induces phosphatidic acid production in tomato cell suspensions. PLANTA 2018; 247:1001-1009. [PMID: 29340795 DOI: 10.1007/s00425-018-2843-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 12/30/2017] [Indexed: 06/07/2023]
Abstract
The phytotoxin botrydial triggers PA production in tomato cell suspensions via PLD and PLC/DGK activation. PLC/DGK-derived PA is partially required for botrydial-induced ROS generation. Phosphatidic acid (PA) is a phospholipid second messenger involved in the induction of plant defense responses. It is generated via two distinct enzymatic pathways, either via phospholipase D (PLD) or by the sequential action of phospholipase C and diacylglycerol kinase (PLC/DGK). Botrydial is a phytotoxic sesquiterpene generated by the necrotrophic fungus Botrytis cinerea that induces diverse plant defense responses, such as the production of reactive oxygen species (ROS). Here, we analyzed PA and ROS production and their interplay upon botrydial treatments, employing tomato (Solanum lycopersicum) cell suspensions as a model system. Botrydial induces PA production within minutes via PLD and PLC/DGK. Either inhibition of PLC or DGK diminishes ROS generation triggered by botrydial. This indicates that PLC/DGK is upstream of ROS production. In tomato, PLC is encoded by a multigene family constituted by SlPLC1-SlPLC6 and the pseudogene SlPLC7. We have shown that SlPLC2-silenced plants have reduced susceptibility to B. cinerea. In this work, we studied the role of SlPLC2 on botrydial-induced PA production by silencing the expression of SlPLC2 via a specific artificial microRNA. Upon botrydial treatments, SlPLC2-silenced-cell suspensions produce PA levels similar to wild-type cells. It can be concluded that PA is a novel component of the plant responses triggered by botrydial.
Collapse
Affiliation(s)
- Juan Martin D'Ambrosio
- Instituto de Investigaciones Biológicas, CONICET, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC. 1245, 7600, Mar del Plata, Argentina
| | - Gabriela Gonorazky
- Instituto de Investigaciones Biológicas, CONICET, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC. 1245, 7600, Mar del Plata, Argentina
| | | | - Javier Moraga
- Departamento de Química Orgánica, Universidad de Cádiz, Cadiz, Spain
| | - Andrés Arruebarrena Di Palma
- Instituto de Investigaciones Biológicas, CONICET, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC. 1245, 7600, Mar del Plata, Argentina
| | - Lorenzo Lamattina
- Instituto de Investigaciones Biológicas, CONICET, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC. 1245, 7600, Mar del Plata, Argentina
| | | | - Ana Maria Laxalt
- Instituto de Investigaciones Biológicas, CONICET, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC. 1245, 7600, Mar del Plata, Argentina.
| |
Collapse
|
197
|
Xu Z, Song N, Ma L, Fang D, Wu J. NaPDR1 and NaPDR1-like are essential for the resistance of Nicotiana attenuata against fungal pathogen Alternaria alternata. PLANT DIVERSITY 2018; 40:68-73. [PMID: 30159544 PMCID: PMC6091937 DOI: 10.1016/j.pld.2018.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Revised: 01/08/2018] [Accepted: 01/09/2018] [Indexed: 05/18/2023]
Abstract
Pleiotropic drug resistance (PDR) transporters are widely distributed membrane proteins catalyzing the export or import of a diverse array of molecules, and are involved in many plant responses to biotic and abiotic stresses. However, it is unclear whether PDRs are involved in Nicotiana attenuata resistance to the necrotic fungal pathogen Alternaria alternata. In this study, transcriptional levels of both NaPDR1 and NaPDR1-like were highly induced in N. attenuata leaves after A. alternata inoculation. Interestingly, silencing NaPDR1 or NaPDR1-like individually had little effect on N. attenuata resistance to A. alternata; however, when both genes were co-silenced plants became highly susceptible to the fungus, which was associated with elevated JA and ethylene responses. Neither NaPDR1 nor NaPDR1-like was significantly elicited by exogenous treatment with methyl jasmonate (MeJA), whereas both were highly induced by ethylene. The elicitation levels of both genes by A. alternata were significantly reduced in plants with impaired JA or ethylene signaling pathways. Thus, we conclude that both NaPDR1 and NaPDR1-like function redundantly to confer resistance against A. alternata in N. attenuata, and the elicitation of the transcripts of both genes by the fungus is partially dependent on ethylene and jasmonate signaling.
Collapse
Affiliation(s)
- Zhen Xu
- Key Laboratory of Economic Plants and Biotechnology, Yunnan Key Laboratory for Research and Development of Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China
- College of Life Science, University of Yunnan, Kunming, 650091, China
| | - Na Song
- Key Laboratory of Economic Plants and Biotechnology, Yunnan Key Laboratory for Research and Development of Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China
| | - Lan Ma
- Key Laboratory of Economic Plants and Biotechnology, Yunnan Key Laboratory for Research and Development of Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China
| | - Dunhuang Fang
- Yunnan Academy of Tobacco Agricultural Sciences, Kunming, 650021, China
- Corresponding author. Yunnan Academy of Tobacco Agricultural Sciences, Kunming, 650021, China.
| | - Jinsong Wu
- Key Laboratory of Economic Plants and Biotechnology, Yunnan Key Laboratory for Research and Development of Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China
- Corresponding author. Key Laboratory of Economic Plants and Biotechnology, Yunnan Key Laboratory for Research and Development of Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China. Fax: +86 0 871 65238769.
| |
Collapse
|
198
|
Abstract
The fungal pathogen Magnaporthe oryzae causes severe disease symptoms and yield losses on rice plants. A new study shows that this fungus elicits disease lesions by co-opting a host protein and reveals how rice plants fight back.
Collapse
|
199
|
The Arabidopsis thaliana Mediator subunit MED8 regulates plant immunity to Botrytis Cinerea through interacting with the basic helix-loop-helix (bHLH) transcription factor FAMA. PLoS One 2018. [PMID: 29513733 PMCID: PMC5841781 DOI: 10.1371/journal.pone.0193458] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The Mediator complex is at the core of transcriptional regulation and plays a central role in plant immunity. The MEDIATOR25 (MED25) subunit of Arabidopsis thaliana regulates jasmonate-dependent resistance to Botrytis cinerea through interacting with the basic helix-loop-helix (bHLH) transcription factor of jasmonate signaling, MYC2. Another Mediator subunit, MED8, acts independently or together with MED25 in plant immunity. However, unlike MED25, the underlying action mechanisms of MED8 in regulating B. cinerea resistance are still unknown. Here, we demonstrated that MED8 regulated plant immunity to B. cinerea through interacting with another bHLH transcription factor, FAMA, which was previously shown to control the final proliferation/differentiation switch during stomatal development. Our research demonstrates that FAMA is also an essential component of B. cinerea resistance. The fama loss-of-function mutants (fama-1 and fama-2) increased susceptibility to B. cinerea infection and reduced defense-gene expression. On the contrary, transgenic lines constitutively overexpressing FAMA showed opposite B. cinerea responses compared with the fama loss-of-function mutants. FAMA-overexpressed plants displayed enhanced resistance to B. cinerea infection and increased expression levels of defensin genes following B. cinerea treatment. Genetic analysis of MED8 and FAMA suggested that FAMA-regulated pathogen resistance was dependent on MED8. In addition, MED8 and FAMA were both associated with the G-box region in the promoter of ORA59. Our findings indicate that the MED8 subunit of the A. thaliana Mediator regulates plant immunity to B. cinerea through interacting with the transcription factor FAMA, which was discovered to be a key component in B. cinerea resistance.
Collapse
|
200
|
Wang M, Zhu Y, Han R, Yin W, Guo C, Li Z, Wang X. Expression of Vitis amurensis VaERF20 in Arabidopsis thaliana Improves Resistance to Botrytis cinerea and Pseudomonas syringae pv. Tomato DC3000. Int J Mol Sci 2018; 19:E696. [PMID: 29494485 PMCID: PMC5877557 DOI: 10.3390/ijms19030696] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 02/02/2018] [Accepted: 02/06/2018] [Indexed: 12/01/2022] Open
Abstract
Ethylene response factor (ERF) transcription factors play important roles in regulating immune responses in plants. In our study, we characterized a member of the ERF transcription factor family, VaERF20, from the Chinese wild Vitis genotype, V. amurensis Rupr "Shuangyou". Phylogenetic analysis indicated that VaERF20 belongs to group IXc of the ERF family, in which many members are known to contribute to fighting pathogen infection. Consistent with this, expression of VaERF20 was induced by treatment with the necrotrophic fungal pathogen Botrytis cinerea (B. cinerea) in "Shuangyou" and V. vinifera "Red Globe". Arabidopsis thaliana plants over-expressing VaERF20 displayed enhanced resistance to B. cinerea and the bacterium Pseudomonas syringae pv. tomato (Pst) DC3000. Patterns of pathogen-induced reactive oxygen species (ROS) accumulation were entirely distinct in B. cinerea and PstDC3000 inoculated plants. Examples of both salicylic acid (SA) and jasmonic acid/ethylene (JA/ET) responsive defense genes were up-regulated after B. cinerea and PstDC3000 inoculation of the VaERF20-overexpressing transgenic A. thaliana plants. Evidence of pattern-triggered immunity (PTI), callose accumulation and stomatal defense, together with increased expression of PTI genes, was also greater in the transgenic lines. These data indicate that VaERF20 participates in various signal transduction pathways and acts as an inducer of immune responses.
Collapse
Affiliation(s)
- Mengnan Wang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling 712100, China.
| | - Yanxun Zhu
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling 712100, China.
| | - Rui Han
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling 712100, China.
| | - Wuchen Yin
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling 712100, China.
| | - Chunlei Guo
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling 712100, China.
| | - Zhi Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling 712100, China.
| | - Xiping Wang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling 712100, China.
| |
Collapse
|