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Zhou M, Zhang J, Zhao Z, Liu W, Wu Z, Huang L. Pseudomonas syringae pv. actinidiae Unique Effector HopZ5 Interacts with GF14C to Trigger Plant Immunity. PHYTOPATHOLOGY 2024:PHYTO09230330R. [PMID: 39102501 DOI: 10.1094/phyto-09-23-0330-r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
The bacterial canker of kiwifruit caused by Pseudomonas syringae pv. actinidiae (Psa) is the most devastating disease threatening the global kiwifruit production. This pathogen delivers multiple effector proteins into plant cells to resist plant immune responses and facilitate their survival. Here, we focused on the unique effector HopZ5 in Psa, which previously has been reported to have virulence functions. In this study, our results showed that HopZ5 could cause macroscopic cell death and trigger a serious immune response by agroinfiltration in Nicotiana benthamiana, along with upregulated expression of immunity-related genes and significant accumulation of reactive oxygen species and callose. Subsequently, we confirmed that HopZ5 interacted with the phosphoserine-binding protein GF14C in both the nonhost plant N. benthamiana (NbGF14C) and the host plant kiwifruit (AcGF14C), and silencing of NbGF14C compromised HopZ5-mediated cell death, suggesting that GF14C plays a crucial role in the detection of HopZ5. Further studies showed that overexpression of NbGF14C both markedly reduced the infection of Sclerotinia sclerotiorum and Phytophthora capsica in N. benthamiana, and overexpression of AcGF14C significantly enhanced the resistance of kiwifruit against Psa, indicating that GF14C positively regulates plant immunity. Collectively, our results revealed that the virulence effector HopZ5 could be recognized by plants and interact with GF14C to activate plant immunity.
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Affiliation(s)
- Mingxia Zhou
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100, Shaanxi, China
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jinglong Zhang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100, Shaanxi, China
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Zhibo Zhao
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100, Shaanxi, China
- Department of Plant Pathology, College of Agriculture, Guizhou University, Guiyang 550025, Guizhou, China
| | - Wei Liu
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100, Shaanxi, China
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Zhiran Wu
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100, Shaanxi, China
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Lili Huang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100, Shaanxi, China
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
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Qiu C, Zhang H, Liu Z. Alternaria solani core effector Aex59 is a new member of the Alt a 1 protein family and is recognized as a PAMP. Int J Biol Macromol 2024; 278:134918. [PMID: 39179073 DOI: 10.1016/j.ijbiomac.2024.134918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 08/18/2024] [Accepted: 08/19/2024] [Indexed: 08/26/2024]
Abstract
Early blight caused by Alternaria solani is a destructive disease in potato production. Here, through systematically screening of an effector protein pool consisting of 115 small cysteine-containing candidate Aex (Alternariaextracellular proteins) in A. solani, we identified a core effector protein named Aex59, a pathogen-associated molecular pattern (PAMP) molecule. Aex59 is uniquely present in the Ascomycota of fungi and can activate defense responses in multiple plants. Targeted gene disruption showed that Aex59 is a virulence factor and participates in spore development. Perception of Aex59 in Nicotiana benthamiana does not depend on the receptor-like kinases Brassinosteroid-associated kinase1 (BAK1) and Suppressor of BIR1-1 (SOBIR1), which are required for multiple pattern recognition receptors (PRR) pathways. Sequence analysis revealed that Aex59 is a new member of the Alt a 1 protein family and is a potential molecular marker capable of aiding in the classification of the fungi Alternaria spp.
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Affiliation(s)
- Chaodong Qiu
- Department of Plant Pathology, School of Plant Protection, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Huajian Zhang
- Department of Plant Pathology, School of Plant Protection, Anhui Agricultural University, Hefei, Anhui 230036, China; Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei, Anhui 230036, China
| | - Zhenyu Liu
- Department of Plant Pathology, School of Plant Protection, Anhui Agricultural University, Hefei, Anhui 230036, China; Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei, Anhui 230036, China.
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3
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Giulietti S, Bigini V, Savatin DV. ROS and RNS production, subcellular localization, and signaling triggered by immunogenic danger signals. JOURNAL OF EXPERIMENTAL BOTANY 2024; 75:4512-4534. [PMID: 37950493 DOI: 10.1093/jxb/erad449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 11/08/2023] [Indexed: 11/12/2023]
Abstract
Plants continuously monitor the environment to detect changing conditions and to properly respond, avoiding deleterious effects on their fitness and survival. An enormous number of cell surface and intracellular immune receptors are deployed to perceive danger signals associated with microbial infections. Ligand binding by cognate receptors represents the first essential event in triggering plant immunity and determining the outcome of the tissue invasion attempt. Reactive oxygen and nitrogen species (ROS/RNS) are secondary messengers rapidly produced in different subcellular localizations upon the perception of immunogenic signals. Danger signal transduction inside the plant cells involves cytoskeletal rearrangements as well as several organelles and interactions between them to activate key immune signaling modules. Such immune processes depend on ROS and RNS accumulation, highlighting their role as key regulators in the execution of the immune cellular program. In fact, ROS and RNS are synergic and interdependent intracellular signals required for decoding danger signals and for the modulation of defense-related responses. Here we summarize current knowledge on ROS/RNS production, compartmentalization, and signaling in plant cells that have perceived immunogenic danger signals.
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Affiliation(s)
- Sarah Giulietti
- Department of Agriculture and Forest Sciences, University of Tuscia, Via S. Camillo de Lellis, 01100 Viterbo, Italy
- Department of Biology and Biotechnologies 'Charles Darwin', Sapienza University of Rome, P. le Aldo Moro 5, 00185 Rome, Italy
| | - Valentina Bigini
- Department of Agriculture and Forest Sciences, University of Tuscia, Via S. Camillo de Lellis, 01100 Viterbo, Italy
| | - Daniel V Savatin
- Department of Agriculture and Forest Sciences, University of Tuscia, Via S. Camillo de Lellis, 01100 Viterbo, Italy
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Hu H, He W, Qu Z, Dong X, Ren Z, Qin M, Liu H, Zheng L, Huang J, Chen XL. De-nitrosylation Coordinates Appressorium Function for Infection of the Rice Blast Fungus. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2403894. [PMID: 38704696 PMCID: PMC11234416 DOI: 10.1002/advs.202403894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 04/18/2024] [Indexed: 05/07/2024]
Abstract
As a signaling molecule, nitric oxide (NO) regulates the development and stress response in different organisms. The major biological activity of NO is protein S-nitrosylation, whose function in fungi remains largely unclear. Here, it is found in the rice blast fungus Magnaporthe oryzae, de-nitrosylation process is essential for functional appressorium formation during infection. Nitrosative stress caused by excessive accumulation of NO is harmful for fungal infection. While the S-nitrosoglutathione reductase GSNOR-mediated de-nitrosylation removes excess NO toxicity during appressorium formation to promote infection. Through an indoTMT switch labeling proteomics technique, 741 S-nitrosylation sites in 483 proteins are identified. Key appressorial proteins, such as Mgb1, MagB, Sps1, Cdc42, and septins, are activated by GSNOR through de-nitrosylation. Removing S-nitrosylation sites of above proteins is essential for proper protein structure and appressorial function. Therefore, GSNOR-mediated de-nitrosylation is an essential regulator for appressorium formation. It is also shown that breaking NO homeostasis by NO donors, NO scavengers, as well as chemical inhibitor of GSNOR, shall be effective methods for fungal disease control.
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Affiliation(s)
- Hong Hu
- National Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Wenhui He
- National Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Zhiguang Qu
- National Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xiang Dong
- National Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Zhiyong Ren
- National Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Mengyuan Qin
- National Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Hao Liu
- National Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Lu Zheng
- National Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Junbin Huang
- National Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xiao-Lin Chen
- National Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
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OuYang X, Wang L, Luo X, Li C, An X, Yao L, Huang W, Zhang Z, Zhang S, Liu Y, Wu S. Pepper vein yellow virus P0 protein triggers NbHERC3, NbBax, and NbCRR mediated hypersensitive response. J Basic Microbiol 2024; 64:e2400023. [PMID: 38558182 DOI: 10.1002/jobm.202400023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/12/2024] [Accepted: 03/11/2024] [Indexed: 04/04/2024]
Abstract
P0 proteins encoded by the pepper vein yellow virus (PeVYV) are pathogenic factors that cause hypersensitive response (HR). However, the host gene expression related to PeVYV P0-induced HR has not been thoroughly studied. Transcriptomic technology was used to investigate the host pathways mediated by the PeVYV P0 protein to explore the molecular mechanisms underlying its function. We found 12,638 differentially expressed genes (DEGs); 6784 and 5854 genes were significantly upregulated and downregulated, respectively. Transcriptomic and reverse-transcription quantitative polymerase chain reaction (RT-qPCR) analyses revealed that salicylic acid (SA) and jasmonic acid (JA) synthesis-related gene expression was upregulated, and ethylene synthesis-related gene expression was downregulated. Ultrahigh performance liquid chromatography-tandem mass spectrometry was used to quantify SA and JA concentrations in Nicotiana benthamiana, and the P0 protein induced SA and JA biosynthesis. We then hypothesized that the pathogenic activity of the P0 protein might be owing to proteins related to host hormones in the SA and JA pathways, modulating host resistance at different times. Viral gene silencing suppression technology was used in N. benthamiana to characterize candidate proteins, and downregulating NbHERC3 (Homologous to E6-AP carboxy-terminus domain and regulator of choromosome condensation-1 dmain protein 3) accelerated cell necrosis in the host. The downregulation of NbCRR reduced cell death, while that of NbBax induced necrosis and curled heart leaves. Our findings indicate that NbHERC3, NbBax, and NbCRR are involved in P0 protein-driven cell necrosis.
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Affiliation(s)
- Xian OuYang
- Plant Protection College of Hunan Agricultural University, Changsha, China
| | - Lishuang Wang
- Institute of Plant Protection of Guizhou Academy of Agricultural Science, Guiyang, China
| | - Xiangwen Luo
- Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Institute of Plant Protection of Hunan Academy of Agricultural Science, Changsha, China
| | - Chun Li
- Institute of Plant Protection of Guizhou Academy of Agricultural Science, Guiyang, China
| | - Xingyu An
- Institute of Plant Protection of Guizhou Academy of Agricultural Science, Guiyang, China
| | - Ling Yao
- Institute of Plant Protection of Guizhou Academy of Agricultural Science, Guiyang, China
| | - Wei Huang
- Institute of Plant Protection of Guizhou Academy of Agricultural Science, Guiyang, China
| | - Zhanhong Zhang
- Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Institute of Plant Protection of Hunan Academy of Agricultural Science, Changsha, China
| | - Songbai Zhang
- Plant Protection College of Hunan Agricultural University, Changsha, China
- Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Institute of Plant Protection of Hunan Academy of Agricultural Science, Changsha, China
| | - Yong Liu
- Plant Protection College of Hunan Agricultural University, Changsha, China
- Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Institute of Plant Protection of Hunan Academy of Agricultural Science, Changsha, China
| | - Shiping Wu
- Institute of Plant Protection of Guizhou Academy of Agricultural Science, Guiyang, China
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Farooq S, Lone ML, Ul Haq A, Parveen S, Altaf F, Tahir I. Signalling cascades choreographing petal cell death: implications for postharvest quality. PLANT MOLECULAR BIOLOGY 2024; 114:63. [PMID: 38805152 DOI: 10.1007/s11103-024-01449-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 04/01/2024] [Indexed: 05/29/2024]
Abstract
Senescence is a multifaceted and dynamic developmental phase pivotal in the plant's lifecycle, exerting significant influence and involving intricate regulatory mechanisms marked by a variety of structural, biochemical and molecular alterations. Biochemical changes, including reactive oxygen species (ROS) generation, membrane deterioration, nucleic acid degradation and protein degradation, characterize flower senescence. The progression of senescence entails a meticulously orchestrated network of interconnected molecular mechanisms and signalling pathways, ensuring its synchronized and efficient execution. Within flowering plants, petal senescence emerges as a crucial aspect significantly impacting flower longevity and postharvest quality, emphasizing the pressing necessity of unravelling the underlying signalling cascades orchestrating this process. Understanding the complex signalling pathways regulating petal senescence holds paramount importance, not only shedding light on the broader phenomenon of plant senescence but also paving the way for the development of targeted strategies to enhance the postharvest longevity of cut flowers. Various signalling pathways participate in petal senescence, encompassing hormone signalling, calcium signalling, protein kinase signalling and ROS signalling. Among these, the ethylene signalling pathway is extensively studied, and the manipulation of genes associated with ethylene biosynthesis or signal transduction has demonstrated the potential to enhance flower longevity. A thorough understanding of these complex pathways is critical for effectively delaying flower senescence, thereby enhancing postharvest quality and ornamental value. Therefore, this review adopts a viewpoint that combines fundamental research into the molecular intricacies of senescence with a practical orientation towards developing strategies for improving the postharvest quality of cut flowers. The innovation of this review is to shed light on the pivotal signalling cascades underpinning flower senescence and offer insights into potential approaches for modulating these pathways to postpone petal senescence in ornamental plants.
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Affiliation(s)
- Sumira Farooq
- Plant Physiology and Biochemistry Research Laboratory, Department of Botany, University of Kashmir, Srinagar, 190006, India
| | - Mohammad Lateef Lone
- Plant Physiology and Biochemistry Research Laboratory, Department of Botany, University of Kashmir, Srinagar, 190006, India
| | - Aehsan Ul Haq
- Plant Physiology and Biochemistry Research Laboratory, Department of Botany, University of Kashmir, Srinagar, 190006, India
| | - Shazia Parveen
- Plant Physiology and Biochemistry Research Laboratory, Department of Botany, University of Kashmir, Srinagar, 190006, India
| | - Foziya Altaf
- Plant Physiology and Biochemistry Research Laboratory, Department of Botany, University of Kashmir, Srinagar, 190006, India
| | - Inayatullah Tahir
- Plant Physiology and Biochemistry Research Laboratory, Department of Botany, University of Kashmir, Srinagar, 190006, India.
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Lv W, Jiang H, Cao Q, Ren H, Wang X, Wang Y. A tau class glutathione S-transferase in tea plant, CsGSTU45, facilitates tea plant susceptibility to Colletotrichum camelliae infection mediated by jasmonate signaling pathway. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 117:1356-1376. [PMID: 38059663 DOI: 10.1111/tpj.16567] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 10/10/2023] [Accepted: 11/20/2023] [Indexed: 12/08/2023]
Abstract
Tea plant [Camellia sinensis (L.) O. Kuntze], as one of the most important commercial crops, frequently suffers from anthracnose caused by Colletotrichum camelliae. The plant-specific tau (U) class of glutathione S-transferases (GSTU) participates in ROS homeostasis. Here, we identified a plant-specific GST tau class gene from tea plant, CsGSTU45, which is induced by various stresses, including C. camelliae infection, by analyzing multiple transcriptomes. CsGSTU45 plays a negative role in disease resistance against C. camelliae by accumulating H2 O2 . JA negatively regulates the resistance of tea plants against C. camelliae, which depends on CsGSTU45. CsMYC2.2, which is the key regulator in the JA signaling pathway, directly binds to and activates the promoter of CsGSTU45. Furthermore, silencing CsMYC2.2 increased disease resistance associated with reduced transcript and protein levels of CsGSTU45, and decreased contents of H2 O2 . Therefore, CsMYC2.2 suppresses disease resistance against C. camelliae by binding to the promoter of the CsGSTU45 gene and activating CsGSTU45. CsJAZ1 interacts with CsMYC2.2. Silencing CsJAZ1 attenuates disease resistance, upregulates the expression of CsMYC2.2 elevates the level of the CsGSTU45 protein, and promotes the accumulation of H2 O2 . As a result, CsJAZ1 interacts with CsMYC2.2 and acts as its repressor to suppress the level of CsGSTU45 protein, eventually enhancing disease resistance in tea plants. Taken together, the results show that the JA signaling pathway mediated by CsJAZ1-CsMYC2.2 modulates tea plant susceptibility to C. camelliae by regulating CsGSTU45 to accumulate H2 O2 .
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Affiliation(s)
- Wuyun Lv
- College of Tea Science and Tea Culture, Zhejiang A & F University, Hangzhou, 311300, Zhejiang, China
| | - Hong Jiang
- College of Tea Science and Tea Culture, Zhejiang A & F University, Hangzhou, 311300, Zhejiang, China
| | - Qinghai Cao
- College of Tea Science and Tea Culture, Zhejiang A & F University, Hangzhou, 311300, Zhejiang, China
| | - Henze Ren
- College of Tea Science and Tea Culture, Zhejiang A & F University, Hangzhou, 311300, Zhejiang, China
| | - Xinchao Wang
- Tea Research Institute, Chinese Academy of Agricultural Sciences/National Center for Tea Improvement/Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, Zhejiang, China
| | - Yuchun Wang
- College of Tea Science and Tea Culture, Zhejiang A & F University, Hangzhou, 311300, Zhejiang, China
- Tea Research Institute, Chinese Academy of Agricultural Sciences/National Center for Tea Improvement/Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, Zhejiang, China
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Qiu C, Halterman D, Zhang H, Liu Z. Multifunctionality of AsCFEM6 and AsCFEM12 effectors from the potato early blight pathogen Alternaria solani. Int J Biol Macromol 2024; 257:128575. [PMID: 38048930 DOI: 10.1016/j.ijbiomac.2023.128575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/31/2023] [Accepted: 12/01/2023] [Indexed: 12/06/2023]
Abstract
Plant pathogens secrete fungal-specific common in several fungal extracellular membrane (CFEM) effectors to manipulate host immunity and contribute to their virulence. Little is known about effectors and their functions in Alternaria solani, the necrotrophic fungal pathogen causing potato early blight. To identify candidate CFEM effector genes, we mined A. solani genome databases. This led to the identification of 12 genes encoding CFEM proteins (termed AsCFEM1-AsCFEM12) and 6 of them were confirmed to be putative secreted effectors. In planta expression revealed that AsCFEM6 and AsCFEM12 have elicitor function that triggers plant defense response including cell death in different botanical families. Targeted gene disruption of AsCFEM6 and AsCFEM12 resulted in a change in spore development, significant reduction of virulence on potato and eggplant susceptible cultivars, increased resistance to fungicide stress, variation in iron acquisition and utilization, and the involvement in 1,8-dihydroxynaphthalene (DHN) melanin biosynthesis pathway. Using maximum likelihood method, we found that positive selection likely caused the polymorphism within AsCFEM6 and AsCFEM12 homologs in different Alternaria spp. Site-directed mutagenesis analysis indicated that positive selection sites within their CFEM domains are required for cell death induction in Nicotiana benthamiana and are critical for response to abiotic stress in yeast. These results demonstrate that AsCFEM effectors possess additional functions beyond their roles in host plant immune response and pathogen virulence.
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Affiliation(s)
- Chaodong Qiu
- Department of Plant Pathology, School of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Dennis Halterman
- U.S. Department of Agriculture-Agricultural Research Service, Vegetable Crops Research Unit, Madison, WI 53706, USA
| | - Huajian Zhang
- Department of Plant Pathology, School of Plant Protection, Anhui Agricultural University, Hefei, China; Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei 230036, China.
| | - Zhenyu Liu
- Department of Plant Pathology, School of Plant Protection, Anhui Agricultural University, Hefei, China; Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei 230036, China.
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Liu S, Liu R, Lv J, Feng Z, Wei F, Zhao L, Zhang Y, Zhu H, Feng H. The glycoside hydrolase 28 member VdEPG1 is a virulence factor of Verticillium dahliae and interacts with the jasmonic acid pathway-related gene GhOPR9. MOLECULAR PLANT PATHOLOGY 2023; 24:1238-1255. [PMID: 37401912 PMCID: PMC10502839 DOI: 10.1111/mpp.13366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/28/2023] [Accepted: 05/29/2023] [Indexed: 07/05/2023]
Abstract
Glycoside hydrolase (GH) family members act as virulence factors and regulate plant immune responses during pathogen infection. Here, we characterized the GH28 family member endopolygalacturonase VdEPG1 in Verticillium dahliae. VdEPG1 acts as a virulence factor during V. dahliae infection. The expression level of VdEPG1 was greatly increased in V. dahliae inoculated on cotton roots. VdEPG1 suppressed VdNLP1-mediated cell death by modulating pathogenesis-related genes in Nicotiana benthamiana. Knocking out VdEPG1 led to a significant decrease in the pathogenicity of V. dahliae in cotton. The deletion strains were more susceptible to osmotic stress and the ability of V. dahliae to utilize carbon sources was deficient. In addition, the deletion strains lost the ability to penetrate cellophane membrane, with mycelia showing a disordered arrangement on the membrane, and spore development was affected. A jasmonic acid (JA) pathway-related gene, GhOPR9, was identified as interacting with VdEPG1 in the yeast two-hybrid system. The interaction was further confirmed by bimolecular fluorescence complementation and luciferase complementation imaging assays in N. benthamiana leaves. GhOPR9 plays a positive role in the resistance of cotton to V. dahliae by regulating JA biosynthesis. These results indicate that VdEPG1 may be able to regulate host immune responses as a virulence factor through modulating the GhOPR9-mediated JA biosynthesis.
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Affiliation(s)
- Shichao Liu
- National Key Laboratory of Cotton Bio‐breeding and Integrated UtilizationInstitute of Cotton Research of Chinese Academy of Agricultural SciencesAnyangHenanChina
- Spice and Beverage Research InstituteChinese Academy of Tropical Agricultural SciencesWanningHainanChina
| | - Ruibing Liu
- National Key Laboratory of Cotton Bio‐breeding and Integrated UtilizationInstitute of Cotton Research of Chinese Academy of Agricultural SciencesAnyangHenanChina
- Spice and Beverage Research InstituteChinese Academy of Tropical Agricultural SciencesWanningHainanChina
| | - Junyuan Lv
- National Key Laboratory of Cotton Bio‐breeding and Integrated UtilizationInstitute of Cotton Research of Chinese Academy of Agricultural SciencesAnyangHenanChina
| | - Zili Feng
- National Key Laboratory of Cotton Bio‐breeding and Integrated UtilizationInstitute of Cotton Research of Chinese Academy of Agricultural SciencesAnyangHenanChina
| | - Feng Wei
- National Key Laboratory of Cotton Bio‐breeding and Integrated UtilizationInstitute of Cotton Research of Chinese Academy of Agricultural SciencesAnyangHenanChina
- Western Agricultural Research Center of Chinese Academy of Agricultural SciencesChinese Academy of Agricultural SciencesChangjiXinjiangChina
| | - Lihong Zhao
- National Key Laboratory of Cotton Bio‐breeding and Integrated UtilizationInstitute of Cotton Research of Chinese Academy of Agricultural SciencesAnyangHenanChina
| | - Yalin Zhang
- National Key Laboratory of Cotton Bio‐breeding and Integrated UtilizationInstitute of Cotton Research of Chinese Academy of Agricultural SciencesAnyangHenanChina
| | - Heqin Zhu
- National Key Laboratory of Cotton Bio‐breeding and Integrated UtilizationInstitute of Cotton Research of Chinese Academy of Agricultural SciencesAnyangHenanChina
- Western Agricultural Research Center of Chinese Academy of Agricultural SciencesChinese Academy of Agricultural SciencesChangjiXinjiangChina
| | - Hongjie Feng
- National Key Laboratory of Cotton Bio‐breeding and Integrated UtilizationInstitute of Cotton Research of Chinese Academy of Agricultural SciencesAnyangHenanChina
- Western Agricultural Research Center of Chinese Academy of Agricultural SciencesChinese Academy of Agricultural SciencesChangjiXinjiangChina
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10
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Shirai M, Eulgem T. Molecular interactions between the soilborne pathogenic fungus Macrophomina phaseolina and its host plants. FRONTIERS IN PLANT SCIENCE 2023; 14:1264569. [PMID: 37780504 PMCID: PMC10539690 DOI: 10.3389/fpls.2023.1264569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 08/28/2023] [Indexed: 10/03/2023]
Abstract
Mentioned for the first time in an article 1971, the occurrence of the term "Macrophomina phaseolina" has experienced a steep increase in the scientific literature over the past 15 years. Concurrently, incidences of M. phaseolina-caused crop diseases have been getting more frequent. The high levels of diversity and plasticity observed for M. phasolina genomes along with a rich equipment of plant cell wall degrading enzymes, secondary metabolites and putative virulence effectors as well as the unusual longevity of microsclerotia, their asexual reproduction structures, make this pathogen very difficult to control and crop protection against it very challenging. During the past years several studies have emerged reporting on host defense measures against M. phaseolina, as well as mechanisms of pathogenicity employed by this fungal pathogen. While most of these studies have been performed in crop systems, such as soybean or sesame, recently interactions of M. phaseolina with the model plant Arabidopsis thaliana have been described. Collectively, results from various studies are hinting at a complex infection cycle of M. phaseolina, which exhibits an early biotrophic phase and switches to necrotrophy at later time points during the infection process. Consequently, responses of the hosts are complex and seem coordinated by multiple defense-associated phytohormones. However, at this point no robust and strong host defense mechanism against M. phaseolina has been described.
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Affiliation(s)
| | - Thomas Eulgem
- Center for Plant Cell Biology, Institute for Integrative Genome Biology, Department of Botany & Plant Sciences, University of California at Riverside, Riverside, CA, United States
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11
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Takasato S, Bando T, Ohnishi K, Tsuzuki M, Hikichi Y, Kiba A. Phosphatidylinositol-phospholipase C3 negatively regulates the hypersensitive response via complex signaling with MAP kinase, phytohormones, and reactive oxygen species in Nicotiana benthamiana. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:4721-4735. [PMID: 37191942 PMCID: PMC10433933 DOI: 10.1093/jxb/erad184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 05/15/2023] [Indexed: 05/17/2023]
Abstract
Phospholipid signaling plays important roles in plant immune responses. Here, we focused on two phospholipase C3 (PLC3) orthologs in the Nicotiana benthamiana genome, NbPLC3-1 and NbPLC3-2. We generated NbPLC3-1 and NbPLC3-2-double-silenced plants (NbPLC3s-silenced plants). In NbPLC3s-silenced plants challenged with Ralstonia solanacearum 8107, induction of hypersensitive response (HR)-related cell death and bacterial population reduction was accelerated, and the expression level of Nbhin1, a HR marker gene, was enhanced. Furthermore, the expression levels of genes involved in salicylic acid and jasmonic acid signaling drastically increased, reactive oxygen species production was accelerated, and NbMEK2-induced HR-related cell death was also enhanced. Accelerated HR-related cell death was also observed by bacterial pathogens Pseudomonas cichorii, P. syringae, bacterial AvrA, oomycete INF1, and TMGMV-CP with L1 in NbPLC3s-silenced plants. Although HR-related cell death was accelerated, the bacterial population was not reduced in double NbPLC3s and NbCoi1-suppressed plants nor in NbPLC3s-silenced NahG plants. HR-related cell death acceleration and bacterial population reduction resulting from NbPLC3s-silencing were compromised by the concomitant suppression of either NbPLC3s and NbrbohB (respiratory oxidase homolog B) or NbPLC3s and NbMEK2 (mitogen activated protein kinase kinase 2). Thus, NbPLC3s may negatively regulate both HR-related cell death and disease resistance through MAP kinase- and reactive oxygen species-dependent signaling. Disease resistance was also regulated by NbPLC3s through jasmonic acid- and salicylic acid-dependent pathways.
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Affiliation(s)
- Shiori Takasato
- Laboratory of Plant Pathology and Biotechnology, Faculty of Agriculture and Marine Science Kochi University, Nankoku, Kochi 783-8502, Japan
| | - Takuya Bando
- Laboratory of Plant Pathology and Biotechnology, Faculty of Agriculture and Marine Science Kochi University, Nankoku, Kochi 783-8502, Japan
| | - Kouhei Ohnishi
- Laboratory of Defense in Plant–Pathogen Interactions, Research Institute of Molecular Genetics, Kochi University, Nankoku, Kochi 783-8502, Japan
| | - Masayuki Tsuzuki
- Laboratory of Plant Pathology and Biotechnology, Faculty of Agriculture and Marine Science Kochi University, Nankoku, Kochi 783-8502, Japan
| | - Yasufumi Hikichi
- Laboratory of Plant Pathology and Biotechnology, Faculty of Agriculture and Marine Science Kochi University, Nankoku, Kochi 783-8502, Japan
| | - Akinori Kiba
- Laboratory of Plant Pathology and Biotechnology, Faculty of Agriculture and Marine Science Kochi University, Nankoku, Kochi 783-8502, Japan
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12
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Li T, Liu R, Liu Z, Chang J, Li J. Effects of Intermittent Temperature and Humidity Regulation on Tomato Gray Mold. PLANT DISEASE 2023; 107:2335-2345. [PMID: 36627805 DOI: 10.1094/pdis-10-22-2339-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Temperature and humidity play an important role in plant-pathogen interactions. However, regulating the temperature and humidity specifically to inhibit the development of plant diseases remains unclear. In this study, we explored the influence of intermittent temperature and humidity variation on tomato gray mold. Intermittent regulation of temperature and humidity (increasing temperature with decreasing humidity for different periods within 24 h) inhibited the disease severity of plants and the infection process of Botrytis cinerea. The 4-h treatment (increasing temperature accompanied by decreasing humidity for 4 h and recovering for 4 h, and so on) effectively inhibited the development of tomato gray mold, reduced the biomass of B. cinerea, delayed the differentiation time of mycelia, and inhibited the accumulation of hydrogen peroxide in tomato leaves at the later stage of infection. The increased expressions of heat-shock protein (HSP) genes HSP20, HSP70, HSP90, BAG6, and BAG7 in tomato were mainly caused by environmental changes and environment-plant-pathogen interactions, and the increased expression of the latter was greater than that of the former in the 2-h (increasing temperature accompanied by decreasing humidity for 2 h and recovering for 2 h, and so on) and 4-h treatments. Pathogen infection induced the expression of defense-related genes in tomato, and the increase in the expressions of FLS2, FEI1, PI2, Pti5, and WRKY75 induced by B. cinerea in the 4-h treatment was greater than that under unregulated temperature and humidity conditions. In general, intermittent temperature and humidity variation can effectively inhibit the development of tomato gray mold, and the 4-h treatment had the best inhibitory effect.
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Affiliation(s)
- Tianzhu Li
- College of Horticulture, Northwest Agricultural and Forestry University, Yangling 712100, China
| | - Ruyi Liu
- College of Horticulture, Northwest Agricultural and Forestry University, Yangling 712100, China
| | - Zhaoyu Liu
- College of Horticulture, Northwest Agricultural and Forestry University, Yangling 712100, China
| | - Jiayue Chang
- College of Horticulture, Northwest Agricultural and Forestry University, Yangling 712100, China
| | - Jianming Li
- College of Horticulture, Northwest Agricultural and Forestry University, Yangling 712100, China
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13
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Verticillium dahliae Effector VdCE11 Contributes to Virulence by Promoting Accumulation and Activity of the Aspartic Protease GhAP1 from Cotton. Microbiol Spectr 2023; 11:e0354722. [PMID: 36656049 PMCID: PMC9927275 DOI: 10.1128/spectrum.03547-22] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Verticillium dahliae is a soilborne plant fungal pathogen that causes Verticillium wilt, a disease that reduces the yields of many economically important crops. Despite its worldwide distribution and harmful impacts, much remains unknown regarding how the numerous effectors of V. dahliae modulate plant immunity. Here, we identified the intracellular effector VdCE11 that induces cell death and defense responses in Nicotiana benthamiana to counter leaf pathogens such as Sclerotinia sclerotiorum and Botrytis cinerea. VdCE11 also contributes to the virulence of V. dahliae in cotton and Arabidopsis. Yeast two-hybrid library screening and immunoprecipitation revealed that VdCE11 interacts physically with the cotton aspartic protease GhAP1. GhAP1 and its Arabidopsis homolog AtAP1 are negative regulators of plant immunity, since disruption of either increased the resistance of cotton or Arabidopsis to V. dahliae. Further, VdCE11 plays a role in promoting the accumulation of the AP1 proteins and increasing its hydrolase activity. Taken together, these results indicate a novel mechanism regulating virulence whereby the secreted effector VdCE11 increases cotton susceptibility to V. dahliae by promoting the accumulation and activity of GhAP1. IMPORTANCE Verticclium dahliae is a plant fungal pathogen that causes a destructive vascular disease on a large number of plant hosts, resulting in great threat to agricultural production. In this study, we identified a V. dahliae effector VdCE11 that induces cell death and defense responses in Nicotiana benthamiana. Meanwhile, VdCE11 contributes to the virulence of V. dahliae in cotton and Arabidopsis. Yeast two-hybrid library screening and immunoprecipitation revealed that VdCE11 interacts physically with the cotton aspartic protease GhAP1. GhAP1 and its Arabidopsis homolog AtAP1 are negative regulators of plant immunity since disruption of either increased the resistance of cotton or Arabidopsis to V. dahliae. Further research showed that VdCE11 plays a role in promoting the accumulation of the AP1 proteins and increasing its hydrolase activity. These results suggested that a novel mechanism regulating virulence whereby VdCE11 increases susceptibility to V. dahliae by promoting the accumulation and activity of GhAP1 in the host.
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14
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Singh A. GIGANTEA regulates PAD4 transcription to promote pathogen defense against Hyaloperonospora arabidopsidis in Arabidopsis thaliana. PLANT SIGNALING & BEHAVIOR 2022; 17:2058719. [PMID: 35379074 PMCID: PMC8986176 DOI: 10.1080/15592324.2022.2058719] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/21/2022] [Accepted: 03/21/2022] [Indexed: 05/27/2023]
Abstract
Plants have evolved a network of complex signaling pathways that allow them to cope with the fluctuations of internal and external environmental cues. GIGANTEA (GI), a well-known, highly conserved plant nuclear protein, has been shown to regulate multiple biological functions in plants such as circadian rhythm, light signaling, cold tolerance, hormone signaling, and photoperiodic flowering. Recently, the role of GI in disease tolerance against different pathogens has come to light; however, a detailed mechanism to understand the role of GI in pathogen defense remains largely unexplained. Here, we report that GIGANTEA is upregulated upon infection with a virulent oomycete pathogen, Hyaloperonospora arabidopsidis (Hpa), in Arabidopsis thaliana accession Col-0. To investigate the role of GI in Arabidopsis defense, we examined the pathogen infection phenotype of gi mutant plants and found that gi-100 mutant was highly susceptible to Hpa Noco2 infection. Notably, the quantitative real-time PCR showed that PHYTOALEXIN DEFICIENT4 (PAD4) and several PAD4-regulated downstream genes were downregulated upon Noco2 infection in gi-100 mutant as compared to Col-0 plants. Furthermore, the chromatin immunoprecipitation results show that GI can directly bind to the intronic region of the PAD4 gene, which might explain the mechanism of GI function in regulating disease resistance in plants. Taken together, our results suggest that GI expression is induced upon Hpa pathogen infection and GI can regulate the expression of PAD4 to promote resistance against the oomycete pathogen Hyaloperonospora arabidopsidis in Arabidopsis thaliana.
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Affiliation(s)
- Anamika Singh
- School of Biological Sciences, National Institute of Science Education and Research (Niser) Bhubaneswar, Jatni, India
- Homi Bhabha National Institute, Training School Complex, Mumbai, India
- Department of Plant Developmental Biology, Max Planck Institute for Plant Breeding Research, Cologne, Germany
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15
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Imran M, Khan AL, Mun BG, Bilal S, Shaffique S, Kwon EH, Kang SM, Yun BW, Lee IJ. Melatonin and nitric oxide: Dual players inhibiting hazardous metal toxicity in soybean plants via molecular and antioxidant signaling cascades. CHEMOSPHERE 2022; 308:136575. [PMID: 36155020 DOI: 10.1016/j.chemosphere.2022.136575] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 09/18/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
Melatonin (MT), a ubiquitous signaling molecule, is known to improve plant growth. Its regulatory function alongside nitric oxide (NO) is known to induce heavy metal (Cd and Pb) stress tolerance, although the underlying mechanisms remain unknown. Here, we observed that the combined application of MT and NO remarkably enhanced plant biomass by reducing oxidative stress. Both MT and NO minimized metal toxicity by significantly lowering the levels of endogenous abscisic acid and jasmonic acid via downregulating NCED3 and upregulating catabolic genes (CYP707A1 and CYP707A2). MT/NO-induced mitigation of Cd and Pb stress was associated with increased endo-melatonin and variable endo-S-nitrosothiol levels caused by enhanced expression of gmNR and gmGSNOR mRNAs. Remarkably, the combined application of MT/NO reduced soil Cd and Pb mobilization by increasing the uptake of Ca2+ and K+ and increasing the exudation of organic acids into the rhizosphere. These results correlated with the upregulation of MTF-1 and WARKY27 during metal translocation. MT/NO regulates the MAPK and CDPK cascades to promote plant cell survival and Ca2+ signaling, thereby imparting resistance to heavy metal toxicity. In conclusion, MT/NO modulates the stress-resistance machinery to mitigate Cd and Pb toxicity by regulating the activation of antioxidant and molecular transcription factors.
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Affiliation(s)
- Muhammad Imran
- Department of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea.
| | - Abdul Latif Khan
- Department of Engineering Technology, College of Technology, University of Houston, Sugar Land, TX 77479, USA
| | - Bong-Gyu Mun
- Department of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Saqib Bilal
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa 616, Oman
| | - Shifa Shaffique
- Department of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Eun-Hae Kwon
- Department of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Sang-Mo Kang
- Department of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Byung-Wook Yun
- Department of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea.
| | - In-Jung Lee
- Department of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea.
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16
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Li X, Mu K, Yang S, Wei J, Wang C, Yan W, Yuan F, Wang H, Han D, Kang Z, Zeng Q. Reduction of Rhizoctonia cerealis Infection on Wheat Through Host- and Spray-Induced Gene Silencing of an Orphan Secreted Gene. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2022; 35:803-813. [PMID: 36102883 DOI: 10.1094/mpmi-04-22-0075-r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Rhizoctonia cerealis is a soilborne fungus that can cause sharp eyespot in wheat, resulting in massive yield losses found in many countries. Due to the lack of resistant cultivars, fungicides have been widely used to control this pathogen. However, chemical control is not environmentally friendly and is costly. Meanwhile, the lack of genetic transformation tools has hindered the functional characterization of virulence genes. In this study, we attempted to characterize the function of virulence genes by two transient methods, host-induced gene silencing (HIGS) and spray-induced gene silencing (SIGS), which use RNA interference to suppress the pathogenic development. We identified ten secretory orphan genes from the genome. After silencing these ten genes, only the RcOSP1 knocked-down plant significantly inhibited the growth of R. cerealis. We then described RcOSP1 as an effector that could impair wheat biological processes and suppress pathogen-associated molecular pattern-triggered immunity in the infection process. These findings confirm that HIGS and SIGS can be practical tools for researching R. cerealis virulence genes. [Formula: see text] Copyright © 2022 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Xiang Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
| | - Keqing Mu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
| | - Shuqing Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
| | - Jiajing Wei
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
| | - Congnawei Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
| | - Weiyi Yan
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
| | - Fengping Yuan
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
| | - Haiying Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
| | - Dejun Han
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
| | - Zhensheng Kang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
- Yangling Seed Industry Innovation Center, Yangling, Shaanxi 712100, China
| | - Qingdong Zeng
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
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17
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He S, Huang Y, Sun Y, Liu B, Wang S, Xuan Y, Gao Z. The Secreted Ribonuclease SRE1 Contributes to Setosphaeria turcica Virulence and Activates Plant Immunity. Front Microbiol 2022; 13:941991. [PMID: 35875548 PMCID: PMC9304870 DOI: 10.3389/fmicb.2022.941991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 06/20/2022] [Indexed: 11/13/2022] Open
Abstract
During the plant infection process, pathogens can secrete several effectors. Some of the effectors are well-known for their roles in regulating plant immunity and promoting successful pathogen colonization. However, there are few studies on the ribonuclease (RNase) effectors secreted by fungi. In the present study, we discovered a secretable RNase (SRE1) in the secretome of Setosphaeria turcica that was significantly upregulated during the early stages of S. turcica infection in maize. Knockdown of SRE1 significantly reduced the virulence of S. turcica. SRE1 can induce cell death in maize and Nicotiana benthamiana. However, unlike the conventional hypersensitive response (HR) caused by other effectors, SRE1 is not dependent on its signal peptide (SP) or plant receptor kinases (such as BAK1 and SOBIR1). SRE1-induced cell death depends upon its enzymatic activity and the N-terminal β-hairpin structure. SRE1 relies on its N-terminal β-hairpin structure to enter cells, and then degrades plant's RNA through its catalytic activity causing cytotoxic effects. Additionally, SRE1 enhances N. benthamiana's resistance to pathogenic fungi and oomycetes. In summary, SRE1 promotes the virulence of S. turcica, inducing plant cell death and activating plant immune responses.
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Affiliation(s)
- Shidao He
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Yufei Huang
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Yanqiu Sun
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Bo Liu
- College of Life Sciences, Yan'an University, Yan'an, China
| | - Suna Wang
- College of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China
| | - Yuanhu Xuan
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Zenggui Gao
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
- *Correspondence: Zenggui Gao
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18
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Xu Y, Wang Y, Wang L, Liang W, Yang Q. Sodium Valproate Is Effective Against Botrytis cinerea Infection of Tomato by Enhancing Histone H3 Acetylation-Directed Gene Transcription and Triggering Tomato Fruit Immune Response. PHYTOPATHOLOGY 2022; 112:1264-1272. [PMID: 34982575 DOI: 10.1094/phyto-11-21-0483-r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Botrytis cinerea causes gray mold resulting in enormous financial loss. Fungicide resistance of B. cinerea has become a serious issue in food safety and agricultural environmental protection. Sodium valproate (SV) has been used in clinical trials; thus, it is an excellent candidate for fungicide development, considering its safety. However, the antifungal activity remains unclear. SV was effective against B. cinerea by enhancing acetylation of histone H3, including H3K9ac, H3K14ac, and H3K56ac. A transcriptomics analysis revealed that the expression of 1,557 genes changed significantly in response to SV. A pathway enrichment analysis identified 16 significant GO terms, in which molecular functions were mainly involved. In addition, the expression levels of 13 genes involved in B. cinerea virulence and five genes involved in tomato immune response were altered by the SV treatment. These results indicate that SV inhibits B. cinerea by enhancing acetylation of histone H3 and modifying gene transcription. Thus, SV is an effective, safe, potential antifungal agent for control of both pre- and postharvest losses caused by B. cinerea.
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Affiliation(s)
- Yang Xu
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Yameng Wang
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Lulu Wang
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Wenxing Liang
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Qianqian Yang
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China
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19
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A Putative Effector LtCSEP1 from Lasiodiplodia theobromae Inhibits BAX-Triggered Cell Death and Suppresses Immunity Responses in Nicotiana benthamiana. PLANTS 2022; 11:plants11111462. [PMID: 35684232 PMCID: PMC9182993 DOI: 10.3390/plants11111462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 05/24/2022] [Accepted: 05/25/2022] [Indexed: 11/17/2022]
Abstract
Lasiodiplodia theobromae is a causal agent of grapevine trunk disease, and it poses a significant threat to the grape industry worldwide. Fungal effectors play an essential role in the interaction between plants and pathogens. However, few studies have been conducted to understand the functions of individual effectors in L. theobromae. In this study, we identified and characterized a candidate secreted effector protein, LtCSEP1, in L. theobromae. Gene expression analysis suggested that transcription of LtCSEP1 in L. theobromae was induced at the early infection stages in the grapevine. Yeast secretion assay revealed that LtCSEP1 contains a functional signal peptide. Transient expression of LtCSEP1 in Nicotiana benthamiana suppresses BAX-trigged cell death and significantly inhibits the flg22-induced PTI-associated gene expression. Furthermore, the ectopic expression of LtCSEP1 in N. benthamiana enhanced disease susceptibility to L. theobromae by downregulating the defense-related genes. These results demonstrated that LtCSEP1 is a potential effector of L. theobromae, which contributes to suppressing the plant’s defenses.
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20
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Zhang Z, Xie Y, Sun P, Zhang F, Zheng P, Wang X, You C, Hao Y. Nitrate-inducible MdBT2 acts as a restriction factor to limit apple necrotic mosaic virus genome replication in Malus domestica. MOLECULAR PLANT PATHOLOGY 2022; 23:383-399. [PMID: 34837323 PMCID: PMC8828459 DOI: 10.1111/mpp.13166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Apple necrotic mosaic virus (ApNMV) is highly associated with the occurrence of apple mosaic disease in China. However, ApNMV-host interactions and defence mechanisms of host plants against this virus are poorly studied. Here, we report that nitrate treatment restrains ApNMV genomic RNA accumulation by destabilizing viral replication protein 1a through the MdBT2-mediated ubiquitin-proteasome pathway. MdBT2, a nitrate-responsive BTB/TAZ domain-containing protein, was identified in a yeast two-hybrid screen of an apple cDNA library using viral protein 1a as bait, and 1a was further confirmed to interact with MdBT2 both in vivo and in vitro. It was further verified that MdBT2 promoted the ubiquitination and degradation of viral protein 1a through the ubiquitin-proteasome pathway in an MdCUL3A-independent manner. Viral genomic RNA accumulation was reduced in MdBT2-overexpressing transgenic apple leaves but enhanced in MdBT2-antisense leaves compared to the wild type. Moreover, MdBT2 was found to interfere with the interaction between viral replication proteins 1a and 2apol by competitively interacting with 1a. Taken together, our results demonstrate that nitrate-inducible MdBT2 functions as a limiting factor in ApNMV viral RNA accumulation by promoting the ubiquitination and degradation of viral protein 1a and interfering with interactions between viral replication proteins.
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Affiliation(s)
- Zhenlu Zhang
- State Key Laboratory of Crop BiologyCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anChina
| | - Yin‐Huan Xie
- State Key Laboratory of Crop BiologyCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anChina
| | - Ping Sun
- State Key Laboratory of Crop BiologyCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anChina
| | - Fu‐Jun Zhang
- State Key Laboratory of Crop BiologyCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anChina
| | - Peng‐Fei Zheng
- State Key Laboratory of Crop BiologyCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anChina
| | - Xiao‐Fei Wang
- State Key Laboratory of Crop BiologyCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anChina
| | - Chun‐Xiang You
- State Key Laboratory of Crop BiologyCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anChina
| | - Yu‐Jin Hao
- State Key Laboratory of Crop BiologyCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anChina
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21
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Sun S, Ren Y, Wang D, Farooq T, He Z, Zhang C, Li S, Yang X, Zhou X. A group I WRKY transcription factor regulates mulberry mosaic dwarf-associated virus-triggered cell death in Nicotiana benthamiana. MOLECULAR PLANT PATHOLOGY 2022; 23:237-253. [PMID: 34738705 PMCID: PMC8743015 DOI: 10.1111/mpp.13156] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 10/19/2021] [Accepted: 10/20/2021] [Indexed: 05/27/2023]
Abstract
Geminiviruses constitute the largest group of known plant viruses and cause devastating losses to a wide range of crops and woody plants globally. Mulberry mosaic dwarf-associated virus (MMDaV), identified from Chinese mulberry trees via small RNA-based deep sequencing, is a divergent monopartite geminivirus belonging to the genus Mulcrilevirus of the family Geminiviridae. Previous studies have shown that plants employ multiple layers of defence to protect themselves from geminivirus infection. The interplay between plant and MMDaV is nevertheless less studied. This study presents evidence that MMDaV triggers hypersensitive response (HR)-mediated antiviral defence in Nicotiana benthamiana plants. We show that the RepA protein of MMDaV is engaged in HR-type cell death induction. We find that the RepA mutants with compromised nuclear localization ability impair their capabilities of cell death induction. Virus-induced gene silencing of the key components of the R protein-mediated signalling pathway reveals that down-regulation of the nucleus-targeting NbWRKY1 alleviates the cell death induction activity of RepA. We further demonstrate that RepA up-regulates the transcript level of NbWRKY1. Furthermore, expression of RepA in N. benthamiana confers plant resistance against two begomoviruses. We propose that plant resistance against RepA can be potentially used to improve plant defence against geminiviruses in crops.
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Affiliation(s)
- Shaoshuang Sun
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| | - Yanxiang Ren
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
- State Key Laboratory of Agro‐Biotechnology and Ministry of Agriculture Key Laboratory of Soil MicrobiologyCollege of Biological SciencesChina Agricultural UniversityBeijingChina
| | - Dongxue Wang
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| | - Tahir Farooq
- Plant Protection Research InstituteGuangdong Academy of Agricultural SciencesGuangzhouChina
| | - Zifu He
- Plant Protection Research InstituteGuangdong Academy of Agricultural SciencesGuangzhouChina
| | - Chao Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| | - Shifang Li
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| | - Xiuling Yang
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| | - Xueping Zhou
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
- State Key Laboratory of Rice Biology, Institute of BiotechnologyZhejiang UniversityHangzhouChina
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22
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Nie J, Zhou W, Lin Y, Liu Z, Yin Z, Huang L. Two NIS1-like proteins from apple canker pathogen (Valsa mali) play distinct roles in plant recognition and pathogen virulence. STRESS BIOLOGY 2022; 2:7. [PMID: 37676376 PMCID: PMC10442039 DOI: 10.1007/s44154-021-00031-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 12/19/2021] [Indexed: 09/08/2023]
Abstract
Conserved effectors produced by phytopathogens play critical roles in plant-microbe interactions. NIS1-like proteins represent a newly identified family of effectors distributed in multiple fungal species. However, their biological functions in a majority of pathogenic fungi remain largely elusive and require further investigation. In this study, we characterized two NIS1-like proteins VmNIS1 and VmNIS2 from Valsa mali, the causal agent of apple Valsa canker. Both of these two proteins were predicted to be secreted. Using agroinfiltration, we found that VmNIS1 induced intense cell death, whereas VmNIS2 suppressed INF1 elicitin-triggered cell death in Nicotiana benthamiana. Treatment of N. benthamiana with VmNIS1 recombinant protein produced by Escherichia coli activated a series of immune responses and enhanced plant disease resistance against Phytophthora capsici. In contrast, VmNIS2 suppressed plant immune responses and promoted P. capsici infection when transiently expressed in N. benthamiana. Both VmNIS1 and VmNIS2 were shown to be highly induced at late stage of V. mali infection. By individually knocking out of these two genes in V. mali, however, only VmNIS2 was shown to be required for pathogen virulence as well as tolerance to oxidative stress. Notably, we further showed that C-terminal extension of VmNIS1 was essential for plant recognition and VmNIS2 may escape plant detection via sequence truncation. Our data collectively indicate that VmNIS1 and VmNIS2 play distinct roles in plant recognition and pathogen virulence, which provided new insights into the function of NIS1-like proteins in plant-microbe interactions.
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Affiliation(s)
- Jiajun Nie
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China
| | - Wenjing Zhou
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China
| | - Yonghui Lin
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China
| | - Zhaoyang Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China
| | - Zhiyuan Yin
- College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Lili Huang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China.
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23
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Haq F, Xu X, Ma W, Shah SMA, Liu L, Zhu B, Zou L, Chen G. A Xanthomonas transcription activator-like effector is trapped in nonhost plants for immunity. PLANT COMMUNICATIONS 2022; 3:100249. [PMID: 35059629 PMCID: PMC8760140 DOI: 10.1016/j.xplc.2021.100249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 08/29/2021] [Accepted: 10/13/2021] [Indexed: 05/10/2023]
Abstract
Xanthomonas oryzae pv. oryzae (Xoo), the causal agent of bacterial leaf blight in rice, delivers transcription activator-like effector (TALE) proteins into host cells to activate susceptibility or resistance (R) genes that promote disease or immunity, respectively. Nonhost plants serve as potential reservoirs of R genes; consequently, nonhost R genes may trap TALEs to trigger an immune response. In this study, we screened 17 Xoo TALEs for their ability to induce a hypersensitive response (HR) in the nonhost plant Nicotiana benthamiana (Nb); only AvrXa10 elicited an HR when transiently expressed in Nb. The HR generated by AvrXa10 required both the central repeat region and the activation domain, suggesting a specific interaction between AvrXa10 and a potential R-like gene in nonhost plants. Evans blue staining and ion leakage measurements confirmed that the AvrXa10-triggered HR was a form of cell death, and the transient expression of AvrXa10 in Nb induced immune responses. Genes targeted by AvrXa10 in the Nb genome were identified by transcriptome profiling and prediction of effector binding sites. Using several approaches (in vivo reporter assays, electrophoretic mobility-shift assays, targeted designer TALEs, and on-spot gene silencing), we confirmed that AvrXa10 targets NbZnFP1, a C2H2-type zinc finger protein that resides in the nucleus. Functional analysis indicated that overexpression of NbZnFP1 and its rice orthologs triggered cell death in rice protoplasts. An NbZnFP1 ortholog was also identified in tomato and was specifically activated by AvrXa10. These results demonstrate that NbZnFP1 is a nonhost R gene that traps AvrXa10 to promote plant immunity in Nb.
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Affiliation(s)
- Fazal Haq
- School of Agriculture and Biology/State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
- Key Laboratory of Urban Agriculture of the Ministry of Agriculture, Shanghai, 200240, China
| | - Xiameng Xu
- School of Agriculture and Biology/State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
- Key Laboratory of Urban Agriculture of the Ministry of Agriculture, Shanghai, 200240, China
| | - Wenxiu Ma
- School of Agriculture and Biology/State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
- Key Laboratory of Urban Agriculture of the Ministry of Agriculture, Shanghai, 200240, China
| | - Syed Mashab Ali Shah
- School of Agriculture and Biology/State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
- Key Laboratory of Urban Agriculture of the Ministry of Agriculture, Shanghai, 200240, China
| | - Linlin Liu
- School of Agriculture and Biology/State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
- Key Laboratory of Urban Agriculture of the Ministry of Agriculture, Shanghai, 200240, China
| | - Bo Zhu
- School of Agriculture and Biology/State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
| | - Lifang Zou
- School of Agriculture and Biology/State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
- Key Laboratory of Urban Agriculture of the Ministry of Agriculture, Shanghai, 200240, China
| | - Gongyou Chen
- School of Agriculture and Biology/State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
- Key Laboratory of Urban Agriculture of the Ministry of Agriculture, Shanghai, 200240, China
- Corresponding author
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24
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Zhang J, Zhou M, Liu W, Nie J, Huang L. Pseudomonas syringae pv. actinidiae Effector HopAU1 Interacts with Calcium-Sensing Receptor to Activate Plant Immunity. Int J Mol Sci 2022; 23:508. [PMID: 35008934 PMCID: PMC8745740 DOI: 10.3390/ijms23010508] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/30/2021] [Accepted: 12/31/2021] [Indexed: 02/01/2023] Open
Abstract
Kiwifruit canker, caused by Pseudomonas syringae pv. actinidiae (Psa), is a destructive pathogen that globally threatens the kiwifruit industry. Understanding the molecular mechanism of plant-pathogen interaction can accelerate applying resistance breeding and controlling plant diseases. All known effectors secreted by pathogens play an important role in plant-pathogen interaction. However, the effectors in Psa and their function mechanism remain largely unclear. Here, we successfully identified a T3SS effector HopAU1 which had no virulence contribution to Psa, but could, however, induce cell death and activate a series of immune responses by agroinfiltration in Nicotiana benthamiana, including elevated transcripts of immune-related genes, accumulation of reactive oxygen species (ROS), and callose deposition. We found that HopAU1 interacted with a calcium sensing receptor in N. benthamiana (NbCaS) as well as its close homologue in kiwifruit (AcCaS). More importantly, silencing CaS by RNAi in N. benthamiana greatly attenuated HopAU1-triggered cell death, suggesting CaS is a crucial component for HopAU1 detection. Further researches showed that overexpression of NbCaS in N. benthamiana significantly enhanced plant resistance against Sclerotinia sclerotiorum and Phytophthora capsici, indicating that CaS serves as a promising resistance-related gene for disease resistance breeding. We concluded that HopAU1 is an immune elicitor that targets CaS to trigger plant immunity.
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Affiliation(s)
| | | | | | | | - Lili Huang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Xianyang 712100, China; (J.Z.); (M.Z.); (W.L.); (J.N.)
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25
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Chopra D, Hasan MS, Matera C, Chitambo O, Mendy B, Mahlitz SV, Naz AA, Szumski S, Janakowski S, Sobczak M, Mithöfer A, Kyndt T, Grundler FMW, Siddique S. Plant parasitic cyst nematodes redirect host indole metabolism via NADPH oxidase-mediated ROS to promote infection. THE NEW PHYTOLOGIST 2021; 232:318-331. [PMID: 34133755 DOI: 10.1111/nph.17559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 06/11/2021] [Indexed: 06/12/2023]
Abstract
Reactive oxygen species (ROS) generated in response to infections often activate immune responses in eukaryotes including plants. In plants, ROS are primarily produced by plasma membrane-bound NADPH oxidases called respiratory burst oxidase homologue (Rboh). Surprisingly, Rbohs can also promote the infection of plants by certain pathogens, including plant parasitic cyst nematodes. The Arabidopsis genome contains 10 Rboh genes (RbohA-RbohJ). Previously, we showed that cyst nematode infection causes a localised ROS burst in roots, mediated primarily by RbohD and RbohF. We also found that plants deficient in RbohD and RbohF (rbohD/F) exhibit strongly decreased susceptibility to cyst nematodes, suggesting that Rboh-mediated ROS plays a role in promoting infection. However, little information is known of the mechanism by which Rbohs promote cyst nematode infection. Here, using detailed genetic and biochemical analyses, we identified WALLS ARE THIN1 (WAT1), an auxin transporter, as a downstream target of Rboh-mediated ROS during parasitic infections. We found that WAT1 is required to modulate the host's indole metabolism, including indole-3-acetic acid levels, in infected cells and that this reprogramming is necessary for successful establishment of the parasite. In conclusion, this work clarifies a unique mechanism that enables cyst nematodes to use the host's ROS for their own benefit.
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Affiliation(s)
- Divykriti Chopra
- Rheinische Friedrich-Wilhelms-University of Bonn, INRES - Molecular Phytomedicine, Karlrobert-Kreiten-Straße 13, Bonn, D-53115, Germany
| | - M Shamim Hasan
- Rheinische Friedrich-Wilhelms-University of Bonn, INRES - Molecular Phytomedicine, Karlrobert-Kreiten-Straße 13, Bonn, D-53115, Germany
- Department of Plant Pathology, Faculty of Agriculture, Hajee Mohammad Danesh Science and Technology University, Dinajpur, 5200, Bangladesh
| | - Christiane Matera
- Rheinische Friedrich-Wilhelms-University of Bonn, INRES - Molecular Phytomedicine, Karlrobert-Kreiten-Straße 13, Bonn, D-53115, Germany
| | - Oliver Chitambo
- Rheinische Friedrich-Wilhelms-University of Bonn, INRES - Molecular Phytomedicine, Karlrobert-Kreiten-Straße 13, Bonn, D-53115, Germany
| | - Badou Mendy
- Rheinische Friedrich-Wilhelms-University of Bonn, INRES - Molecular Phytomedicine, Karlrobert-Kreiten-Straße 13, Bonn, D-53115, Germany
| | - Sina-Valerie Mahlitz
- Rheinische Friedrich-Wilhelms-University of Bonn, INRES - Molecular Phytomedicine, Karlrobert-Kreiten-Straße 13, Bonn, D-53115, Germany
| | - Ali Ahmad Naz
- Department of Plant Breeding, Institute of Crop Science and Resource Conservation, University of Bonn, Bonn, D-53115, Germany
| | - Shelly Szumski
- Department of Entomology and Nematology, University of California, Davis, One Shields Ave, Davis, CA, 95616, USA
| | - Slawomir Janakowski
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences (SGGW), Warsaw, PL-02-787, Poland
| | - Miroslaw Sobczak
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences (SGGW), Warsaw, PL-02-787, Poland
| | - Axel Mithöfer
- Research Group Plant Defense Physiology, Max Plank Institute for Chemical Ecology, Hans-Knöll-Straße 8, Jena, D-07745, Germany
| | - Tina Kyndt
- Department Biotechnology, Research Group Epigenetics & Defence, Coupure links 653, Gent, B-9000, Belgium
| | - Florian M W Grundler
- Rheinische Friedrich-Wilhelms-University of Bonn, INRES - Molecular Phytomedicine, Karlrobert-Kreiten-Straße 13, Bonn, D-53115, Germany
| | - Shahid Siddique
- Rheinische Friedrich-Wilhelms-University of Bonn, INRES - Molecular Phytomedicine, Karlrobert-Kreiten-Straße 13, Bonn, D-53115, Germany
- Department of Entomology and Nematology, University of California, Davis, One Shields Ave, Davis, CA, 95616, USA
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26
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Huang S, Tang Z, Zhao R, Hong Y, Zhu S, Fan R, Ding K, Cao M, Luo K, Geng M, Jiang L, Chen Y. Genome-wide identification of cassava MeRboh genes and functional analysis in Arabidopsis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 167:296-308. [PMID: 34391202 DOI: 10.1016/j.plaphy.2021.07.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 07/14/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
Plant respiratory burst oxidase homolog (Rboh) gene family encodes NADPH oxidases, and plays important roles in the production of reactive oxygen species (ROS), plant signaling, growth and stress responses. Cassava is an important starchy crops in tropical region. Environmental stresses, such as drought, pathogen, have caused great yield loss. The mechanisms of stress response are little known in MeRBOH family of cassava. Investigation of Rboh genes response to disease may provide a clue for clarification the disease resistance mechanisms. In this study, eight MeRboh genes were identified from the cassava genome. Comparisons of gene structure, protein motifs, and a phylogenetic tree showed conservation of Rboh gene families in cassava, Arabidopsis and rice. Transcript levels of most MeRboh genes increased following treatment with a pathogen, Xanthomonas axonopodis pv. manihotis, or with phytohormones salicylic acid or jasmonic acid. Analysis of cis-acting elements also indicated that MeRboh genes could response to light, hormone, abiotic and biotic stress. Prediction of miRNA target and post-translation modification sites of MeRboh suggested possible regulations of miRNA and protein phosphorylation; and transient expression of MeRboh in cassava protoplasts confirmed their localization on plasma membrane. Expression of MeRbohB, MeRbohF partially complemented PAMP responses in Arabidopsis rboh mutants, including the expression of PTI marker FRK1, ROS production, peroxide accumulation and callose deposition. It suggesting that MeRbohB and MeRbohF may participate in the PTI pathway and contributed to ROS production triggered by pathogens. Moreover, overexpression of MeRbohB and MeRbohF enhanced the resistance of Arabidopsis against Pseudomonas syringae pv. tomato DC3000. Together, these results suggest the evolutionary conservation of MeRboh gene family and their important role in the immune response and in regulating the plant disease resistance, providing a foundation for revealing molecular mechanisms of cassava disease resistance.
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Affiliation(s)
- Siyuan Huang
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
| | - Zhijuan Tang
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
| | - Rui Zhao
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
| | - Yuhui Hong
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
| | - Shousong Zhu
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
| | - Ruochen Fan
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
| | - Kaixuan Ding
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
| | - Min Cao
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
| | - Kai Luo
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
| | - Mengting Geng
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
| | - Lingyan Jiang
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
| | - Yinhua Chen
- School of life science, Hainan University; Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou, 570228, PR China.
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27
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Liu L, Wang Z, Li J, Wang Y, Yuan J, Zhan J, Wang P, Lin Y, Li F, Ge X. Verticillium dahliae secreted protein Vd424Y is required for full virulence, targets the nucleus of plant cells, and induces cell death. MOLECULAR PLANT PATHOLOGY 2021; 22:1109-1120. [PMID: 34233072 PMCID: PMC8358993 DOI: 10.1111/mpp.13100] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 05/09/2021] [Accepted: 05/27/2021] [Indexed: 05/26/2023]
Abstract
Fungal pathogens secrete effector proteins that regulate host immunity and can suppress basal defence mechanisms against colonization in plants. Verticillium dahliae is a widespread and destructive soilborne fungus that can cause vascular wilt disease and reduces plant yields. However, little is currently known about how the effectors secreted by V. dahliae function. In this study, we analysed and identified 34 candidate effectors in the V. dahliae secretome and found that Vd424Y, a glycoside hydrolase family 11 protein, was highly upregulated during the early stages of V. dahliae infection in cotton plants. This protein was located in the nucleus and its deletion compromised the virulence of the fungus. The transient expression of Vd424Y in Nicotiana benthamiana induced BAK1- and SOBIR1-dependent cell death and activated both salicylic acid and jasmonic acid signalling. This enhanced its resistance to the oomycetes Phytophthora capsici in a way that depended on its nuclear localization signal and signal peptides. Our results demonstrate that Vd424Y is an important effector protein targeting the host nucleus to regulate and activate effector-triggered immunity in plants.
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Affiliation(s)
- Lisen Liu
- Institute of Cotton ResearchHenan Normal University Research Base of State Key Laboratory of Cotton BiologyHenanChina
- National Key Laboratory of Crop Genetic ImprovementHuazhong Agricultural UniversityWuhanChina
| | - Zhaohan Wang
- Institute of Cotton ResearchHenan Normal University Research Base of State Key Laboratory of Cotton BiologyHenanChina
| | - Jianing Li
- Institute of Cotton ResearchHenan Normal University Research Base of State Key Laboratory of Cotton BiologyHenanChina
| | - Ye Wang
- Institute of Cotton ResearchHenan Normal University Research Base of State Key Laboratory of Cotton BiologyHenanChina
| | - Jiachen Yuan
- Institute of Cotton ResearchHenan Normal University Research Base of State Key Laboratory of Cotton BiologyHenanChina
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural SciencesZhengzhou UniversityZhengzhouChina
| | - Jingjing Zhan
- Institute of Cotton ResearchHenan Normal University Research Base of State Key Laboratory of Cotton BiologyHenanChina
| | - Peng Wang
- Institute of Cotton ResearchHenan Normal University Research Base of State Key Laboratory of Cotton BiologyHenanChina
| | - Yongjun Lin
- National Key Laboratory of Crop Genetic ImprovementHuazhong Agricultural UniversityWuhanChina
| | - Fuguang Li
- Institute of Cotton ResearchHenan Normal University Research Base of State Key Laboratory of Cotton BiologyHenanChina
| | - Xiaoyang Ge
- Institute of Cotton ResearchHenan Normal University Research Base of State Key Laboratory of Cotton BiologyHenanChina
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural SciencesZhengzhou UniversityZhengzhouChina
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28
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Gorshkov V, Tsers I. Plant susceptible responses: the underestimated side of plant-pathogen interactions. Biol Rev Camb Philos Soc 2021; 97:45-66. [PMID: 34435443 PMCID: PMC9291929 DOI: 10.1111/brv.12789] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 12/18/2022]
Abstract
Plant susceptibility to pathogens is usually considered from the perspective of the loss of resistance. However, susceptibility cannot be equated with plant passivity since active host cooperation may be required for the pathogen to propagate and cause disease. This cooperation consists of the induction of reactions called susceptible responses that transform a plant from an autonomous biological unit into a component of a pathosystem. Induced susceptibility is scarcely discussed in the literature (at least compared to induced resistance) although this phenomenon has a fundamental impact on plant-pathogen interactions and disease progression. This review aims to summarize current knowledge on plant susceptible responses and their regulation. We highlight two main categories of susceptible responses according to their consequences and indicate the relevance of susceptible response-related studies to agricultural practice. We hope that this review will generate interest in this underestimated aspect of plant-pathogen interactions.
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Affiliation(s)
- Vladimir Gorshkov
- Kazan Institute of Biochemistry and Biophysics, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, Kazan, 420111, Russia.,Laboratory of Plant Infectious Diseases, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, Kazan, 420111, Russia
| | - Ivan Tsers
- Laboratory of Plant Infectious Diseases, Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, Kazan, 420111, Russia
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29
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Romero-Puertas MC, Terrón-Camero LC, Peláez-Vico MÁ, Molina-Moya E, Sandalio LM. An update on redox signals in plant responses to biotic and abiotic stress crosstalk: insights from cadmium and fungal pathogen interactions. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:5857-5875. [PMID: 34111283 PMCID: PMC8355756 DOI: 10.1093/jxb/erab271] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 06/07/2021] [Indexed: 05/09/2023]
Abstract
Complex signalling pathways are involved in plant protection against single and combined stresses. Plants are able to coordinate genome-wide transcriptional reprogramming and display a unique programme of transcriptional responses to a combination of stresses that differs from the response to single stresses. However, a significant overlap between pathways and some defence genes in the form of shared and general stress-responsive genes appears to be commonly involved in responses to multiple biotic and abiotic stresses. Reactive oxygen and nitrogen species, as well as redox signals, are key molecules involved at the crossroads of the perception of different stress factors and the regulation of both specific and general plant responses to biotic and abiotic stresses. In this review, we focus on crosstalk between plant responses to biotic and abiotic stresses, in addition to possible plant protection against pathogens caused by previous abiotic stress. Bioinformatic analyses of transcriptome data from cadmium- and fungal pathogen-treated plants focusing on redox gene ontology categories were carried out to gain a better understanding of common plant responses to abiotic and biotic stresses. The role of reactive oxygen and nitrogen species in the complex network involved in plant responses to changes in their environment is also discussed.
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Affiliation(s)
- María C Romero-Puertas
- Department of Biochemistry and Molecular and Cellular Biology of Plants, Estacion Experimental del Zaidin (EEZ), Consejo Superior de Investigaciones Cientificas (CSIC), Apartado 419, 18080 Granada, Spain
| | - Laura C Terrón-Camero
- Department of Biochemistry and Molecular and Cellular Biology of Plants, Estacion Experimental del Zaidin (EEZ), Consejo Superior de Investigaciones Cientificas (CSIC), Apartado 419, 18080 Granada, Spain
- Bioinformatics Unit, Institute of Parasitology and Biomedicine “López-Neyra” (IPBLN-CSIC), Granada, Spain
| | - M Ángeles Peláez-Vico
- Department of Biochemistry and Molecular and Cellular Biology of Plants, Estacion Experimental del Zaidin (EEZ), Consejo Superior de Investigaciones Cientificas (CSIC), Apartado 419, 18080 Granada, Spain
| | - Eliana Molina-Moya
- Department of Biochemistry and Molecular and Cellular Biology of Plants, Estacion Experimental del Zaidin (EEZ), Consejo Superior de Investigaciones Cientificas (CSIC), Apartado 419, 18080 Granada, Spain
| | - Luisa M Sandalio
- Department of Biochemistry and Molecular and Cellular Biology of Plants, Estacion Experimental del Zaidin (EEZ), Consejo Superior de Investigaciones Cientificas (CSIC), Apartado 419, 18080 Granada, Spain
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30
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Ren H, Zhao X, Li W, Hussain J, Qi G, Liu S. Calcium Signaling in Plant Programmed Cell Death. Cells 2021; 10:cells10051089. [PMID: 34063263 PMCID: PMC8147489 DOI: 10.3390/cells10051089] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 04/24/2021] [Accepted: 04/28/2021] [Indexed: 12/12/2022] Open
Abstract
Programmed cell death (PCD) is a process intended for the maintenance of cellular homeostasis by eliminating old, damaged, or unwanted cells. In plants, PCD takes place during developmental processes and in response to biotic and abiotic stresses. In contrast to the field of animal studies, PCD is not well understood in plants. Calcium (Ca2+) is a universal cell signaling entity and regulates numerous physiological activities across all the kingdoms of life. The cytosolic increase in Ca2+ is a prerequisite for the induction of PCD in plants. Although over the past years, we have witnessed significant progress in understanding the role of Ca2+ in the regulation of PCD, it is still unclear how the upstream stress perception leads to the Ca2+ elevation and how the signal is further propagated to result in the onset of PCD. In this review article, we discuss recent advancements in the field, and compare the role of Ca2+ signaling in PCD in biotic and abiotic stresses. Moreover, we discuss the upstream and downstream components of Ca2+ signaling and its crosstalk with other signaling pathways in PCD. The review is expected to provide new insights into the role of Ca2+ signaling in PCD and to identify gaps for future research efforts.
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Affiliation(s)
- Huimin Ren
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou 311300, China; (H.R.); (X.Z.); (W.L.)
| | - Xiaohong Zhao
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou 311300, China; (H.R.); (X.Z.); (W.L.)
| | - Wenjie Li
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou 311300, China; (H.R.); (X.Z.); (W.L.)
| | - Jamshaid Hussain
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, University Road, Abbottabad 22060, Pakistan;
| | - Guoning Qi
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou 311300, China; (H.R.); (X.Z.); (W.L.)
- Correspondence: (G.Q.); (S.L.)
| | - Shenkui Liu
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou 311300, China; (H.R.); (X.Z.); (W.L.)
- Correspondence: (G.Q.); (S.L.)
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Prakash V, Singh VP, Tripathi DK, Sharma S, Corpas FJ. Nitric oxide (NO) and salicylic acid (SA): A framework for their relationship in plant development under abiotic stress. PLANT BIOLOGY (STUTTGART, GERMANY) 2021; 23 Suppl 1:39-49. [PMID: 33590621 DOI: 10.1111/plb.13246] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 02/03/2021] [Indexed: 05/28/2023]
Abstract
The free radical nitric oxide (NO) and the phenolic phytohormone salicylic acid (SA) are signal molecules which exert key functions at biochemical and physiological levels. Abiotic stresses, especially in early plant development, impose the biggest threats to agricultural systems and crop yield. These stresses impair plant growth and subsequently cause a reduction in root development, affecting nutrient uptake and crop productivity. The molecules NO and SA have been identified as robust tools for efficiently mitigating the negative effects of abiotic stress in plants. SA is engaged in an array of tasks under adverse environmental situations. The function of NO depends on its cellular concentration; at a low level, it acts as a signal molecule, while at a high level, it triggers nitro-oxidative stress. The crosstalk between NO and SA involving different signalling molecules and regulatory factors modulate plant function during stressful situations. Crosstalk between these two signalling molecules induces plant tolerance to abiotic stress and needs further investigation. This review aims to highlight signalling aspects of NO and SA in higher plants and critically discusses the roles of these two molecules in alleviating abiotic stress.
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Affiliation(s)
- V Prakash
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, India
| | - V P Singh
- Department of Botany, C.M.P. Degree College, A Constitute PG College of University of Allahabad, Prayagraj, India
| | - D K Tripathi
- Amity Institute of Organic Agriculture, Amity University Uttar Pradesh, Noida, India
| | - S Sharma
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, India
| | - F J Corpas
- Department of Biochemistry, Cell and Molecular Biology, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain
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Yin Z, Wang N, Pi L, Li L, Duan W, Wang X, Dou D. Nicotiana benthamiana LRR-RLP NbEIX2 mediates the perception of an EIX-like protein from Verticillium dahliae. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2021; 63:949-960. [PMID: 33205907 DOI: 10.1111/jipb.13031] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Accepted: 10/23/2020] [Indexed: 05/23/2023]
Abstract
Verticillium wilt diseases caused by the soil-borne fungus Verticillium dahliae result in devastating yield losses in many economically important crops annually. Here, we identified a novel ethylene-inducing xylanase (EIX)-like protein, VdEIX3, from V. dahliae, which exhibits immunity-inducing activity in Nicotiana benthamiana. In vitro-purified VdEIX3 can induce strong oxidative burst, activate the expression of defense-related genes, and increase resistance against oomycete and fungal pathogens in N. benthamiana. VdEIX3 orthologs of other Verticillium pathogens also induce cell death in N. benthamiana, which form a new type of EIX protein family that is distinct from the known EIX proteins. A leucine-rich repeat receptor-like protein, NbEIX2, regulates the perception of VdEIX3 in N. benthamiana. Our results demonstrate that VdEIX3 is a novel EIX-like protein that can be recognized by N. benthamiana NbEIX2, and also suggest that NbEIX2 is a promising receptor-like protein that is potentially applicable to transgenic breeding for improving resistance to Verticillium wilt diseases.
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Affiliation(s)
- Zhiyuan Yin
- College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Nan Wang
- College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Lei Pi
- College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Lei Li
- College of Plant Protection, China Agricultural University, Beijing, 100193, China
- College of Agriculture, Northeast Agricultural University, Harbin, 150030, China
| | - Weiwei Duan
- College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xiaodan Wang
- College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Daolong Dou
- College of Plant Protection, China Agricultural University, Beijing, 100193, China
- College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China
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Yan Y, Wang P, Wei Y, Bai Y, Lu Y, Zeng H, Liu G, Reiter RJ, He C, Shi H. The dual interplay of RAV5 in activating nitrate reductases and repressing catalase activity to improve disease resistance in cassava. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:785-800. [PMID: 33128298 PMCID: PMC8051611 DOI: 10.1111/pbi.13505] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/14/2020] [Accepted: 09/27/2020] [Indexed: 05/05/2023]
Abstract
Cassava bacterial blight (CBB) caused by Xanthomonas axonopodis pv. manihotis (Xam) seriously affects cassava yield. Nitrate reductase (NR) plays an important role in plant nitrogen metabolism in plants. However, the in vivo role of NR and the corresponding signalling pathway remain unclear in cassava. In this study, we isolated MeNR1/2 and revealed their novel upstream transcription factor MeRAV5. We also identified MeCatalase1 (MeCAT1) as the interacting protein of MeRAV5. In addition, we investigated the role of MeCatalase1 and MeRAV5-MeNR1/2 module in cassava defence response. MeNRs positively regulates cassava disease resistance against CBB through modulation of nitric oxide (NO) and extensive transcriptional reprogramming especially in mitogen-activated protein kinase (MAPK) signalling. Notably, MeRAV5 positively regulates cassava disease resistance through the coordination of NO and hydrogen peroxide (H2 O2 ) level. On the one hand, MeRAV5 directly activates the transcripts of MeNRs and NO level by binding to CAACA motif in the promoters of MeNRs. On the other hand, MeRAV5 interacts with MeCAT1 to inhibit its activity, so as to negatively regulate endogenous H2 O2 level. This study highlights the precise coordination of NR activity and CAT activity by MeRAV5 through directly activating MeNRs and interacting with MeCAT1 in plant immunity.
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Affiliation(s)
- Yu Yan
- Hainan Key Laboratory for Sustainable Utilization of Tropical BioresourcesCollege of Tropical CropsHainan UniversityHaikouChina
| | - Peng Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical BioresourcesCollege of Tropical CropsHainan UniversityHaikouChina
| | - Yunxie Wei
- Hainan Key Laboratory for Sustainable Utilization of Tropical BioresourcesCollege of Tropical CropsHainan UniversityHaikouChina
| | - Yujing Bai
- Hainan Key Laboratory for Sustainable Utilization of Tropical BioresourcesCollege of Tropical CropsHainan UniversityHaikouChina
| | - Yi Lu
- Hainan Key Laboratory for Sustainable Utilization of Tropical BioresourcesCollege of Tropical CropsHainan UniversityHaikouChina
| | - Hongqiu Zeng
- Hainan Key Laboratory for Sustainable Utilization of Tropical BioresourcesCollege of Tropical CropsHainan UniversityHaikouChina
| | - Guoyin Liu
- Hainan Key Laboratory for Sustainable Utilization of Tropical BioresourcesCollege of Tropical CropsHainan UniversityHaikouChina
| | - Russel J. Reiter
- Department of Anatomy and Cell SystemUT Health San AntonioSan AntonioTXUSA
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical BioresourcesCollege of Tropical CropsHainan UniversityHaikouChina
| | - Haitao Shi
- Hainan Key Laboratory for Sustainable Utilization of Tropical BioresourcesCollege of Tropical CropsHainan UniversityHaikouChina
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Pande A, Mun BG, Lee DS, Khan M, Lee GM, Hussain A, Yun BW. NO Network for Plant-Microbe Communication Underground: A Review. FRONTIERS IN PLANT SCIENCE 2021; 12:658679. [PMID: 33815456 PMCID: PMC8010196 DOI: 10.3389/fpls.2021.658679] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 02/24/2021] [Indexed: 05/30/2023]
Abstract
Mechanisms governing plant-microbe interaction in the rhizosphere attracted a lot of investigative attention in the last decade. The rhizosphere is not simply a source of nutrients and support for the plants; it is rather an ecosystem teeming with diverse flora and fauna including different groups of microbes that are useful as well as harmful for the plants. Plant-microbe interaction occurs via a highly complex communication network that involves sophisticated machinery for the recognition of friend and foe at both sides. On the other hand, nitric oxide (NO) is a key, signaling molecule involved in plant development and defense. Studies on legume-rhizobia symbiosis suggest the involvement of NO during recognition, root hair curling, development of infection threads, nodule development, and nodule senescence. A similar role of NO is also suggested in the case of plant interaction with the mycorrhizal fungi. Another, insight into the plant-microbe interaction in the rhizosphere comes from the recognition of pathogen-associated molecular patterns (PAMPs)/microbe-associated molecular patterns (MAMPs) by the host plant and thereby NO-mediated activation of the defense signaling cascade. Thus, NO plays a major role in mediating the communication between plants and microbes in the rhizosphere. Interestingly, reports suggesting the role of silicon in increasing the number of nodules, enhancing nitrogen fixation, and also the combined effect of silicon and NO may indicate a possibility of their interaction in mediating microbial communication underground. However, the exact role of NO in mediating plant-microbe interaction remains elusive. Therefore, understanding the role of NO in underground plant physiology is very important, especially in relation to the plant's interaction with the rhizospheric microbiome. This will help devise new strategies for protection against phytopathogens and enhancing plant productivity by promoting symbiotic interaction. This review focuses on the role of NO in plant-microbe communication underground.
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Affiliation(s)
- Anjali Pande
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
| | - Bong-Gyu Mun
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
| | - Da-Sol Lee
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
| | - Murtaza Khan
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
| | - Geun-Mo Lee
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
| | - Adil Hussain
- Department of Entomology, Abdul Wali Khan University, Mardan, Pakistan
| | - Byung-Wook Yun
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
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Jedelská T, Luhová L, Petřivalský M. Nitric oxide signalling in plant interactions with pathogenic fungi and oomycetes. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:848-863. [PMID: 33367760 DOI: 10.1093/jxb/eraa596] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 12/18/2020] [Indexed: 05/11/2023]
Abstract
Nitric oxide (NO) and reactive nitrogen species have emerged as crucial signalling and regulatory molecules across all organisms. In plants, fungi, and fungi-like oomycetes, NO is involved in the regulation of multiple processes during their growth, development, reproduction, responses to the external environment, and biotic interactions. It has become evident that NO is produced and used as a signalling and defence cue by both partners in multiple forms of plant interactions with their microbial counterparts, ranging from symbiotic to pathogenic modes. This review summarizes current knowledge on the role of NO in plant-pathogen interactions, focused on biotrophic, necrotrophic, and hemibiotrophic fungi and oomycetes. Actual advances and gaps in the identification of NO sources and fate in plant and pathogen cells are discussed. We review the decisive role of time- and site-specific NO production in germination, oriented growth, and active penetration by filamentous pathogens of the host tissues, as well in pathogen recognition, and defence activation in plants. Distinct functions of NO in diverse interactions of host plants with fungal and oomycete pathogens of different lifestyles are highlighted, where NO in interplay with reactive oxygen species governs successful plant colonization, cell death, and establishment of resistance.
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Affiliation(s)
- Tereza Jedelská
- Department of Biochemistry, Faculty of Science, Palacký University in Olomouc, Olomouc, Czech Republic
| | - Lenka Luhová
- Department of Biochemistry, Faculty of Science, Palacký University in Olomouc, Olomouc, Czech Republic
| | - Marek Petřivalský
- Department of Biochemistry, Faculty of Science, Palacký University in Olomouc, Olomouc, Czech Republic
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Kong M, Sheng T, Liang J, Ali Q, Gu Q, Wu H, Chen J, Liu J, Gao X. Melatonin and Its Homologs Induce Immune Responses via Receptors trP47363-trP13076 in Nicotiana benthamiana. FRONTIERS IN PLANT SCIENCE 2021; 12:691835. [PMID: 34276740 PMCID: PMC8278317 DOI: 10.3389/fpls.2021.691835] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 05/24/2021] [Indexed: 05/17/2023]
Abstract
Melatonin (N-acetyl-5-methoxytryptamine), a naturally occurring small molecule, can protect plants against abiotic stress after exogenous treatmenting with it. It is not known if melatonin homologs, such as 5-methoxytryptamine and 5-methoxyindole, that are easy and more cost-effective to synthesize can stimulate the plant immune system in the same manner as melatonin. In the present study, we assessed the biological activity of the melatonin homologs, 5-methoxytryptamin and 5-methoxyindole. The results showed that melatonin and its homologs all induced disease resistance against Phytophthora nicotianae in Nicotiana benthamiana plants. The application of all three compounds also induced stomatal closure and the production of reactive oxygen species. Gene expression analysis indicated that the expression of genes involved in hydrogen peroxide (H2O2), nitric oxide (NO) production, and salicylic acid (SA) biosynthesis was significantly upregulated by all three compounds. Four homologs of the melatonin receptors were identified by blasting search with the phytomelatonin receptor in Arabidopsis. Molecular docking studies were also used to identify four putative melatonin receptors in N. benthamiana. Further experimentation revealed that silencing of the melatonin receptors trP47363 and trP13076 in N. benthamiana compromised the induction of stomatal closure, PR-1a gene expression and SA accumulation by all three compounds. Collectively, our data indicate that the induction of defense responses in N. benthamiana by melatonin, 5-methoxytryptamine, and 5-methoxyindole involves the melatonin receptors trP47363 and trP13076.
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Affiliation(s)
- Mengmeng Kong
- Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Department of Plant Pathology, College of Plant Protection, Ministry of Education, Nanjing Agricultural University, Nanjing, China
| | - Tao Sheng
- Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Department of Plant Pathology, College of Plant Protection, Ministry of Education, Nanjing Agricultural University, Nanjing, China
| | - Jing Liang
- Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Department of Plant Pathology, College of Plant Protection, Ministry of Education, Nanjing Agricultural University, Nanjing, China
| | - Qurban Ali
- Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Department of Plant Pathology, College of Plant Protection, Ministry of Education, Nanjing Agricultural University, Nanjing, China
| | - Qin Gu
- Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Department of Plant Pathology, College of Plant Protection, Ministry of Education, Nanjing Agricultural University, Nanjing, China
| | - Huijun Wu
- Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Department of Plant Pathology, College of Plant Protection, Ministry of Education, Nanjing Agricultural University, Nanjing, China
| | - Jian Chen
- International Genome Center, Jiangsu University, Zhenjiang, China
- Jian Chen,
| | - Jia Liu
- Chongqing Key Laboratory of Economic Plant Biotechnology, College of Landscape Architecture and Life Science/Institute of Special Plants, Chongqing University of Arts and Sciences, Chongqing, China
- Jia Liu,
| | - Xuewen Gao
- Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Department of Plant Pathology, College of Plant Protection, Ministry of Education, Nanjing Agricultural University, Nanjing, China
- *Correspondence: Xuewen Gao,
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Yang Y, Wang X, Chen P, Zhou K, Xue W, Abid K, Chen S. Redox Status, JA and ET Signaling Pathway Regulating Responses to Botrytis cinerea Infection Between the Resistant Cucumber Genotype and Its Susceptible Mutant. FRONTIERS IN PLANT SCIENCE 2020; 11:559070. [PMID: 33101327 PMCID: PMC7546314 DOI: 10.3389/fpls.2020.559070] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 09/04/2020] [Indexed: 05/28/2023]
Abstract
Botrytis cinerea is an important necrotrophic fungal pathogen with a broad host range and the ability to causing great economic losses in cucumber. However, the resistance mechanism against this pathogen in cucumber was not well understood. In this study, the microscopic observation of the spore growth, redox status measurements and transcriptome analysis were carried out after Botrytis cinerea infection in the resistant genotype No.26 and its susceptible mutant 26M. Results revealed shorter hypha, lower rate of spore germination, less acceleration of H2O2, O2 -, and lower total glutathione content (GSH+GSSG) in No.26 than that in 26M, which were identified by the staining result of DAB and NBT. Transcriptome data showed that after pathogen infection, a total of 3901 and 789 different expression genes (DEGs) were identified in No.26 and 26M respectively. These DEGs were highly enriched in redox regulation pathway, hormone signaling pathway and plant-pathogen interaction pathway. The glutathione S-transferase genes, putative peroxidase gene, and NADPH oxidase were up-regulated in No.26 whereas these genes changed little in 26M after Botrytis cinerea infection. Jasmonic acid and ethylene biosynthesis and signaling pathways were distinctively activated in No.26 comparing with 26M upon infection. Much more plant defense related genes including mitogen-activated protein kinases, calmodulin, calmodulin-like protein, calcium-dependent protein kinase, and WRKY transcription factor were induced in No.26 than 26M after pathogen infection. Finally, a model was established which elucidated the resistance difference between resistant cucumber genotype and susceptible mutant after B. cinerea infection.
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Affiliation(s)
- Yuting Yang
- College of Horticulture, Northwest A&F University, Shaanxi Engineering Research Center for Vegetables, Yangling, China
| | - Xuewei Wang
- College of Horticulture, Northwest A&F University, Shaanxi Engineering Research Center for Vegetables, Yangling, China
| | - Panpan Chen
- College of Horticulture, Northwest A&F University, Shaanxi Engineering Research Center for Vegetables, Yangling, China
| | - Keke Zhou
- College of Horticulture, Northwest A&F University, Shaanxi Engineering Research Center for Vegetables, Yangling, China
| | - Wanyu Xue
- College of Horticulture, Northwest A&F University, Shaanxi Engineering Research Center for Vegetables, Yangling, China
| | - Kan Abid
- Department of Horticulture, The University of Haripur, Haripur, Pakistan
| | - Shuxia Chen
- College of Horticulture, Northwest A&F University, Shaanxi Engineering Research Center for Vegetables, Yangling, China
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Xu Y, Qu C, Sun X, Jia Z, Xue M, Zhao H, Zhou X. Nitric Oxide Boosts Bemisia tabaci Performance Through the Suppression of Jasmonic Acid Signaling Pathway in Tobacco Plants. Front Physiol 2020; 11:847. [PMID: 32792979 PMCID: PMC7387647 DOI: 10.3389/fphys.2020.00847] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 06/24/2020] [Indexed: 12/21/2022] Open
Abstract
The intimate relationships between plants and insects start with herbivory, which can be traced back to approximately 420 million year ago. Like many other relationships, a plant–insect interaction can be mutualistic, commensalistic, or antagonistic. Within antagonistic relationships, plants deploy inducible defense to insect phytophagy. Insects, however, can evade/suppress effectual plant defenses by manipulating plant defense signaling. Previously, we showed that the sweet potato whitefly, Bemisia tabaci, a global invasive insect pest, can suppress jasmonic acid (JA)-dependent defenses, thereby enhancing their performance on host plants. Given that nitric oxide (NO), a multifunctional signaling molecule, interacts closely with JA signaling pathway, we hypothesized that NO is involved in the suppression of JA defensive responses. Equipped with an integrated approach, we comprehensively examined this overarching hypothesis. We showed that: (1) tobacco plants responded to B. tabaci infestation by accumulating high levels of NO, (2) the exogenous application of sodium nitroprusside, a NO donor, in tobacco plants attracted B. tabaci adults and accelerated nymphal development, whereas plants treated with 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO), a NO scavenger, repelled B. tabaci adults and prolonged nymphal development, and, more importantly, (3) silencing of NO-associated protein 1, a gene associated with NO accumulation, and cPTIO application disrupted the B. tabaci-mediated suppression of JA in plants. Collectively, these results suggest that: (1) NO signaling is activated by B. tabaci infestation, (2) NO is involved in the suppression of JA-dependent plant defense, and, consequently, (3) NO improves B. tabaci performance on host plants. Our study reflects the remarkable arm race that co-evolved for millions of years between plants and insects and offers a potential novel target (nitric oxide) for the long-term sustainable management of this global invasive pest.
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Affiliation(s)
- Yanan Xu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, China
| | - Cheng Qu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, China
| | - Xia Sun
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, China
| | - Zhifei Jia
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, China
| | - Ming Xue
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, China
| | - Haipeng Zhao
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, China
| | - Xuguo Zhou
- Department of Entomology, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, United States
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Singh NK, Paz E, Kutsher Y, Reuveni M, Lers A. Tomato T2 ribonuclease LE is involved in the response to pathogens. MOLECULAR PLANT PATHOLOGY 2020; 21:895-906. [PMID: 32352631 PMCID: PMC7280031 DOI: 10.1111/mpp.12928] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/05/2020] [Accepted: 02/15/2020] [Indexed: 05/16/2023]
Abstract
T2 ribonucleases (RNases) are RNA-degrading enzymes that function in various cellular processes, mostly via RNA metabolism. T2 RNase-encoding genes have been identified in various organisms, from bacteria to mammals, and are most diverse in plants. The existence of T2 RNase genes in almost every organism suggests an important biological function that has been conserved through evolution. In plants, T2 RNases are suggested to be involved in phosphate scavenging and recycling, and are implicated in defence responses to pathogens. We investigated the function of the tomato T2 RNase LE, known to be induced by phosphate deficiency and wounding. The possible involvement of LE in pathogen responses was examined. Expression analysis showed LE induction during fungal infection and by stimuli known to be associated with pathogen inoculation, including oxalic acid and hydrogen peroxide. Analysis of LE-suppressed transgenic tomato lines revealed higher susceptibility to oxalic acid, a cell death-inducing factor, compared to the wild type. This elevated sensitivity of LE-suppressed lines was evidenced by visual signs of necrosis, and increased ion leakage and reactive oxygen species levels, indicating acceleration of cell death. Challenge of the LE-suppressed lines with the necrotrophic pathogen Botrytis cinerea resulted in accelerated development of disease symptoms compared to the wild type, associated with suppressed expression of pathogenesis-related marker genes. The results suggest a role for plant endogenous T2 RNases in antifungal activity.
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Affiliation(s)
- Naveen Kumar Singh
- Department of Postharvest Science, Volcani CenterAgricultural Research OrganizationRishon LeZionIsrael
| | - Einat Paz
- Department of Postharvest Science, Volcani CenterAgricultural Research OrganizationRishon LeZionIsrael
- The Robert H. Smith Faculty of Agricultural, Food and Environment SciencesHebrew University of JerusalemRehovotIsrael
| | - Yaarit Kutsher
- Plant Science Institute, the Volcani CenterAgricultural Research OrganizationRishon LeZionIsrael
| | - Moshe Reuveni
- Plant Science Institute, the Volcani CenterAgricultural Research OrganizationRishon LeZionIsrael
| | - Amnon Lers
- Department of Postharvest Science, Volcani CenterAgricultural Research OrganizationRishon LeZionIsrael
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40
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Gao X, Zhang Q, Zhao Y, Yang J, He H, Jia G. The lre-miR159a-LrGAMYB pathway mediates resistance to grey mould infection in Lilium regale. MOLECULAR PLANT PATHOLOGY 2020; 21:749-760. [PMID: 32319186 PMCID: PMC7214475 DOI: 10.1111/mpp.12923] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 01/28/2020] [Accepted: 01/28/2020] [Indexed: 05/04/2023]
Abstract
Grey mould is one of the most determinative factors of lily growth and plays a major role in limiting lily productivity. MicroRNA159 (miR159) is a highly conserved microRNA in plants, and participates in the regulation of plant development and stress responses. Our previous studies revealed that lre-miR159a participates in the response of Lilium regale to Botrytis elliptica according to deep sequencing analyses; however, the response mechanism remains unknown. Here, lre-miR159a and its target LrGAMYB gene were isolated from L. regale. Transgenic Arabidopsis overexpressing lre-MIR159a exhibited larger leaves and smaller necrotic spots on inoculation with Botrytis than those of wild-type and overexpressing LrGAMYB plants. The lre-MIR159a overexpression also led to repressed expression of two targets of miR159, AtMYB33 and AtMYB65, and enhanced accumulation of hormone-related genes, including AtPR1, AtPR2, AtNPR1, AtPDF1.2, and AtLOX for both the jasmonic acid and salicylic acid pathways. Moreover, lower levels of H2 O2 and O2- were observed in lre-MIR159a transgenic Arabidopsis, which reduced the damage from reactive oxygen species accumulation. Taken together, these results indicate that lre-miR159a positively regulates resistance to grey mould by repressing the expression of its target LrGAMYB gene and activating a defence response.
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Affiliation(s)
- Xue Gao
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, College of Landscape Architecture, Beijing Laboratory of Urban and Rural Ecological EnvironmentBeijing Forestry UniversityBeijingPR China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of EducationBeijing Forestry UniversityBeijingPR China
| | - Qian Zhang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, College of Landscape Architecture, Beijing Laboratory of Urban and Rural Ecological EnvironmentBeijing Forestry UniversityBeijingPR China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of EducationBeijing Forestry UniversityBeijingPR China
| | - Yu‐Qian Zhao
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, College of Landscape Architecture, Beijing Laboratory of Urban and Rural Ecological EnvironmentBeijing Forestry UniversityBeijingPR China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of EducationBeijing Forestry UniversityBeijingPR China
| | - Jie Yang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, College of Landscape Architecture, Beijing Laboratory of Urban and Rural Ecological EnvironmentBeijing Forestry UniversityBeijingPR China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of EducationBeijing Forestry UniversityBeijingPR China
| | - Heng‐Bin He
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, College of Landscape Architecture, Beijing Laboratory of Urban and Rural Ecological EnvironmentBeijing Forestry UniversityBeijingPR China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of EducationBeijing Forestry UniversityBeijingPR China
| | - Gui‐Xia Jia
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, College of Landscape Architecture, Beijing Laboratory of Urban and Rural Ecological EnvironmentBeijing Forestry UniversityBeijingPR China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of EducationBeijing Forestry UniversityBeijingPR China
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Zhang MM, Wang ZQ, Xu X, Huang S, Yin WX, Luo C. MfOfd1 is crucial for stress responses and virulence in the peach brown rot fungus Monilinia fructicola. MOLECULAR PLANT PATHOLOGY 2020; 21:820-833. [PMID: 32319202 PMCID: PMC7214477 DOI: 10.1111/mpp.12933] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 02/23/2020] [Accepted: 02/24/2020] [Indexed: 06/01/2023]
Abstract
Monilinia fructicola is the most widely distributed species among the Monilinia genus in the world, and causes blossom blight, twig canker, and fruit rot on Rosaceae fruits. To date, studies on genomics and pathogenicity are limited in M. fructicola. In this study, we identified a redox-related gene, MfOfd1, which was significantly up-regulated at 1 hr after inoculation of M. fructicola on peach fruits. We used the clustered regulatory inter-spaced short palindromic repeats (CRISPR)/Cas9 system combined with homologous recombination to determine the function of the MfOfd1 gene. The results showed that the sporulation of knockdown transformants was reduced by 53% to 83%. The knockdown transformants showed increased sensitivity to H2 O2 and decreased virulence on peach fruits compared to the wild-type isolate Bmpc7. It was found that H2 O2 could stimulate the expression of MfOfd1 in the wild-type isolate. The transformants were also more sensitive to exogenous osmotic stress, such as glycerol, d-sorbitol, and NaCl, and to dicarboximide fungicides (iprodione and dimethachlon). These results indicate that the MfOfd1 gene plays an important role in M. fructicola in sporulation, oxidative response, osmotic stress tolerance, and virulence.
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Affiliation(s)
- Ming-Ming Zhang
- The Key Lab of Horticultural Plant BiologyMinistry of EducationHuazhong Agricultural UniversityWuhanChina
| | - Zuo-Qian Wang
- Institute of Plant Protection and Soil FertilizerHubei Academy of Agricultural ScienceWuhanChina
| | - Xiao Xu
- The Key Lab of Horticultural Plant BiologyMinistry of EducationHuazhong Agricultural UniversityWuhanChina
| | - Song Huang
- The Key Lab of Horticultural Plant BiologyMinistry of EducationHuazhong Agricultural UniversityWuhanChina
| | - Wei-Xiao Yin
- Key Lab of Crop Disease Monitoring and Safety Control in Hubei Province and College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanChina
| | - Chao‐Xi Luo
- The Key Lab of Horticultural Plant BiologyMinistry of EducationHuazhong Agricultural UniversityWuhanChina
- Key Lab of Crop Disease Monitoring and Safety Control in Hubei Province and College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanChina
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Chen Q, Dong C, Sun X, Zhang Y, Dai H, Bai S. Overexpression of an apple LysM-containing protein gene, MdCERK1-2, confers improved resistance to the pathogenic fungus, Alternaria alternata, in Nicotiana benthamiana. BMC PLANT BIOLOGY 2020; 20:146. [PMID: 32268888 PMCID: PMC7386173 DOI: 10.1186/s12870-020-02361-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 03/24/2020] [Indexed: 05/26/2023]
Abstract
BACKGROUND Lysin motif (LysM)-containing proteins are involved in the recognition of fungal and bacterial pathogens. However, few studies have reported on their roles in the defense responses of woody plants against pathogens. A previous study reported that the apple MdCERK1 gene was induced by chitin and Rhizoctonia solani, and its protein can bind to chitin. However, its effect on defense responses has not been investigated. RESULTS In this study, a new apple CERK gene, designated as MdCERK1-2, was identified. It encodes a protein that shares high sequence identity with the previously reported MdCERK1 and AtCERK1. Its chitin binding ability and subcellular location are similar to MdCERK1 and AtCERK1, suggesting that MdCERK1-2 may play a role in apple immune defense responses as a pattern recognition receptor (PRR). MdCERK1-2 expression in apple was induced by 2 fungal pathogens, Botryosphaeria dothidea and Glomerella cingulate, but not by the bacterial pathogen, Erwinia amylovora, indicating that MdCERK1-2 is involved in apple anti-fungal defense responses. Further functional analysis by heterologous overexpression (OE) in Nicotiana benthamiana (Nb) demonstrated that MdCERK1-2 OE improved Nb resistance to the pathogenic fungus, Alternaria alternata. H2O2 accumulation and callose deposition increased after A. alternata infection in MdCERK1-2 OE plants compared to wild type (WT) and empty vector (EV)-transformed plants. The induced expression of NbPAL4 by A. alternata significantly (p < 0.01, n = 4) increased in MdCERK1-2 OE plants. Other tested genes, including NbNPR1, NbPR1a, NbERF1, and NbLOX1, did not exhibit significant changes after A. alternata infection in OE plants compared to EV or WT plants. OE plants also accumulated more polyphenols after A. alternata infection. CONCLUSIONS Heterologous MdCERK1-2 OE affects multiple defense responses in Nb plants and increased their resistance to fungal pathogens. This result also suggests that MdCERK1-2 is involved in apple defense responses against pathogenic fungi.
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Affiliation(s)
- Qiming Chen
- College of Life Sciences, Key Laboratory of Plant Biotechnology of Shandong Province, Qingdao Agricultural University, 700 Changcheng Road, Qingdao, 266109, China
- Qingdao Key Laboratory of Genetic Improvement and Breeding in Horticultural Plants, Qingdao Agricultural University, Qingdao, 266109, China
- Shandong Province Key Laboratory of Applied Mycology, Qingdao, 266109, China
| | - Chaohua Dong
- College of Life Sciences, Key Laboratory of Plant Biotechnology of Shandong Province, Qingdao Agricultural University, 700 Changcheng Road, Qingdao, 266109, China
- Qingdao Key Laboratory of Genetic Improvement and Breeding in Horticultural Plants, Qingdao Agricultural University, Qingdao, 266109, China
- Shandong Province Key Laboratory of Applied Mycology, Qingdao, 266109, China
| | - Xiaohong Sun
- College of Life Sciences, Key Laboratory of Plant Biotechnology of Shandong Province, Qingdao Agricultural University, 700 Changcheng Road, Qingdao, 266109, China
- Qingdao Key Laboratory of Genetic Improvement and Breeding in Horticultural Plants, Qingdao Agricultural University, Qingdao, 266109, China
| | - Yugang Zhang
- Qingdao Key Laboratory of Genetic Improvement and Breeding in Horticultural Plants, Qingdao Agricultural University, Qingdao, 266109, China
- College of Horticulture, Qingdao Agricultural University, Qingdao, 266109, China
| | - Hongyi Dai
- Qingdao Key Laboratory of Genetic Improvement and Breeding in Horticultural Plants, Qingdao Agricultural University, Qingdao, 266109, China
- College of Horticulture, Qingdao Agricultural University, Qingdao, 266109, China
| | - Suhua Bai
- College of Life Sciences, Key Laboratory of Plant Biotechnology of Shandong Province, Qingdao Agricultural University, 700 Changcheng Road, Qingdao, 266109, China.
- Qingdao Key Laboratory of Genetic Improvement and Breeding in Horticultural Plants, Qingdao Agricultural University, Qingdao, 266109, China.
- Shandong Province Key Laboratory of Applied Mycology, Qingdao, 266109, China.
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Histochemical and Microscopic Studies Predict that Grapevine Genotype "Ju mei gui" is Highly Resistant against Botrytis cinerea. Pathogens 2020; 9:pathogens9040253. [PMID: 32244290 PMCID: PMC7238070 DOI: 10.3390/pathogens9040253] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 03/27/2020] [Accepted: 03/28/2020] [Indexed: 11/16/2022] Open
Abstract
The necrotrophic fungus Botrytis cinerea causes devastating pre- and post-harvest yield losses in grapevine (Vitis vinifera L.). Although B. cinerea has been well-studied in different plant species, there is limited information related to the resistance and susceptibility mechanisms of Vitis genotypes against B. cinerea infection. In the present study, leaves and berries of twenty four grape genotypes were evaluated against B. cinerea infection. According to the results, one genotype (Ju mei gui) was highly resistant (HR), one genotype (Kyoho) was resistant (R), eight genotypes were susceptible (S), and fourteen genotypes were highly susceptible (HS) against infection of B. cinerea in leaves. Whereas in the case of B. cinerea infection in grape berry, three genotypes were found to be highly resistant, three resistant, eleven genotypes susceptible, and seven were highly susceptible. To further explore the mechanism of disease resistance in grapevine, we evaluated "Ju mei gui" and "Summer black" in terms of B. cinerea progression, reactive oxygen species reactions, jasmonic acid contents, and the activities of antioxidant enzymes in leaf and fruit. We surmise that the resistance of "Ju mei gui" is due to seized fungal growth, minor reactive oxygen species (ROS) production, elevated antioxidant enzyme activity, and more jasmonic acid (JA) contents. This study provides insights into the resistance and susceptibility mechanism of Vitis genotypes against B. cinerea. This will help for the selection of appropriate germplasm to explore the molecular basis of disease resistance mechanisms in grapevine.
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Maurya R, Singh Y, Sinha M, Singh K, Mishra P, Singh SK, Verma S, Prabha K, Kumar K, Verma PK. Transcript profiling reveals potential regulators for oxidative stress response of a necrotrophic chickpea pathogen Ascochyta rabiei. 3 Biotech 2020; 10:117. [PMID: 32117678 DOI: 10.1007/s13205-020-2107-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 02/02/2020] [Indexed: 12/20/2022] Open
Abstract
Necrotrophic pathogens experience host-generated oxidative stress during pathogenesis. They overcome such hostile environment by intricate mechanisms which are largely understudied. In this article, reference-based transcriptome analysis of a devastating Ascochyta Blight (AB) disease causing chickpea pathogen Ascochyta rabiei was explored to get insights into survival mechanisms under oxidative stress. Here, expression profiling of mock-treated and menadione-treated fungus was carried out by RNA-Seq approach. A significant number of genes in response to oxidative stress were overrepresented, suggestive of a robust and coordinated defense system of A. rabiei. A total 73 differentially expressed genes were filtered out from both the transcriptomes, among them 64 were up-regulated and 9 were found down-regulated. The gene ontology and KEGG mapping were conducted to comprehend the possible regulatory roles of differentially expressed genes in metabolic networks and biosynthetic pathways. Transcript profiling, KEGG pathway and gene ontology-based enrichment analysis revealed 12 (16.43%) stress responsive factors, 25 (34.24%) virulence associated genes, 10 (13.69%) putative effectors and 28 (38.35%) important interacting proteins associated with various metabolic pathways. In addition, genes with differential expression were further explored for underlying putative pathogenicity factors. We identified five genes ST47_g10291, ST47_g9396, ST47_g10294, ST47_g4395, and ST47_g7191 that were common to stress and fungal pathogenicity. The factors recognized in this work can be used to establish molecular tools to explain the regulatory gene networks engaged in stress response of fungal pathogens and disease management.
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Affiliation(s)
- Ranjeet Maurya
- 1Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Yeshveer Singh
- 1Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Manisha Sinha
- 1Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Kunal Singh
- 1Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
- 2Present Address: Molecular Plant Pathology Laboratory, Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh 176061 India
| | - Pallavi Mishra
- 1Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Shreenivas Kumar Singh
- 1Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Sandhya Verma
- 1Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Kanchan Prabha
- 1Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Kamal Kumar
- 1Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Praveen Kumar Verma
- 1Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
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Situ J, Jiang L, Fan X, Yang W, Li W, Xi P, Deng Y, Kong G, Jiang Z. An RXLR effector PlAvh142 from Peronophythora litchii triggers plant cell death and contributes to virulence. MOLECULAR PLANT PATHOLOGY 2020; 21:415-428. [PMID: 31912634 PMCID: PMC7036370 DOI: 10.1111/mpp.12905] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 12/05/2019] [Accepted: 12/06/2019] [Indexed: 05/09/2023]
Abstract
Litchi downy blight, caused by the phytopathogenic oomycete Peronophythora litchii, results in tremendous economic loss in litchi production every year. To successfully colonize the host cell, Phytophthora species secret hundreds of RXLR effectors that interfere with plant immunity and facilitate the infection process. Previous work has already predicted 245 candidate RXLR effector-encoding genes in P. litchii, 212 of which have been cloned and tested for plant cell death-inducing activity in this study. We found three such RXLR effectors could trigger plant cell death through transient expression in Nicotiana benthamiana. Further experiments demonstrated that PlAvh142 could induce cell death and immune responses in several plants. We also found that PlAvh142 localized in both the cytoplasm and nucleus of plant cells. The cytoplasmic localization was critical for its cell death-inducing activity. Moreover, deletion either of the two internal repeats in PlAvh142 abolished the cell death-inducing activity. Virus-induced gene silencing assays showed that cell death triggered by PlAvh142 was dependent on the plant transduction components RAR1 (require for Mla12 resistance), SGT1 (suppressor of the G2 allele of skp1) and HSP90 (heat shock protein 90). Finally, knockout of PlAvh142 resulted in significantly attenuated P. litchii virulence on litchi plants, whereas the PlAvh142-overexpressed mutants were more aggressive. These data indicated that PlAvh142 could be recognized in plant cytoplasm and is an important virulence RXLR effector of P. litchii.
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Affiliation(s)
- Junjian Situ
- Department of Plant Pathology/Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
| | - Liqun Jiang
- Department of Plant Pathology/Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
- Guangdong Province Key Laboratory of New Technology in Rice Breeding/Rice Research InstituteGuangdong Academy of Agricultural SciencesGuangzhouChina
| | - Xiaoning Fan
- Department of Plant Pathology/Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
| | - Wensheng Yang
- Department of Plant Pathology/Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
| | - Wen Li
- Department of Plant Pathology/Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
| | - Pinggen Xi
- Department of Plant Pathology/Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
| | - Yizhen Deng
- Department of Plant Pathology/Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
| | - Guanghui Kong
- Department of Plant Pathology/Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
| | - Zide Jiang
- Department of Plant Pathology/Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
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Zhao Y, Lim J, Xu J, Yu J, Zheng W. Nitric oxide as a developmental and metabolic signal in filamentous fungi. Mol Microbiol 2020; 113:872-882. [DOI: 10.1111/mmi.14465] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 01/15/2020] [Accepted: 01/15/2020] [Indexed: 12/19/2022]
Affiliation(s)
- Yanxia Zhao
- Key Laboratory for Biotechnology of Medicinal Plants Jiangsu Normal University Xuzhou China
| | - Jieyin Lim
- Departments of Bacteriology and Genetics Food Research Institute University of Wisconsin‐Madison Madison Wisconsin USA
| | - Jianyang Xu
- Department of Traditional Chinese Medicine General Hospital of Shenzhen University Shenzhen China
| | - Jae‐Hyuk Yu
- Departments of Bacteriology and Genetics Food Research Institute University of Wisconsin‐Madison Madison Wisconsin USA
- Department of Systems Biotechnology Konkuk University Seoul Republic of Korea
| | - Weifa Zheng
- Key Laboratory for Biotechnology of Medicinal Plants Jiangsu Normal University Xuzhou China
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A combined transcriptional, biochemical and histopathological study unravels the complexity of Alternaria resistance and susceptibility in Brassica coenospecies. Fungal Biol 2020; 124:44-53. [PMID: 31892376 DOI: 10.1016/j.funbio.2019.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 10/24/2019] [Accepted: 11/05/2019] [Indexed: 11/21/2022]
Abstract
Alternaria blight is one of the most devastating diseases of rapeseed-mustard caused by a necrotrophic fungus Alternaria brassicae. Lack of satisfactory resistance resource in Brassica is still a main obstruction for developing resistance against Alternaria. In this study, we have selected Brassica juncea, Sinapis alba and Camelina sativa to understand and unravel the mechanism of disease resistance against Alternaria. Histopathological studies showed early onset of necrosis in B. juncea (1 dpi) and delayed in S. alba (2 dpi) and C. sativa (3 dpi) respectively. Early and enhanced production of hydrogen peroxide (H2O2) was observed in C. sativa and S. alba (6 hpi) when compared to B. juncea (12 hpi). An increase in catalase activity was observed in both C. sativa (36 % at 6 hpi) and S. alba (15 % at 12 hpi), whereas it significantly decreased in B. juncea at 6 hpi (23 %), 12 hpi (30 %) and 24 hpi (8 %). Gene expression analysis showed induction of PR-3 and PR-12 genes only in C. sativa and S. alba when compared to B. juncea suggesting their vital role for Alternaria resistance. In contrast, SA marker genes were significantly expressed in B. juncea only which provides evidence of hormonal cross talk in B. juncea during Alternaria infection thereby increasing its susceptibility.
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Chakraborty N, Mukherjee K, Sarkar A, Acharya K. Interaction between Bean and Colletotrichum gloeosporioides: Understanding Through a Biochemical Approach. PLANTS (BASEL, SWITZERLAND) 2019; 8:E345. [PMID: 31547386 PMCID: PMC6783891 DOI: 10.3390/plants8090345] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 08/31/2019] [Accepted: 09/09/2019] [Indexed: 02/07/2023]
Abstract
In addition to its role in animals, nowadays nitric oxide (NO) is considered as an emerging signaling molecule in plant systems. It is now believed that NO exerts its pivotal role in various plant physiological processes, such as in seed germination, plant developmental stages, and plant defense mechanisms. In this study, we have taken an initiative to show the biochemical basis of defense response activation in bean leaves during the progression of Colletotrichum gloeosporioides (Penz.) Penz. and Sacc. in detached bean leaves. Stages of pathogen penetration and colonization were successfully established in the detached bean leaves. Results showed up-regulation of different defense-related enzymes and other defense molecules, such as phenols, flavonoids, callose, and lignin molecules, along with NO at early stages of pathogen invasion. Although in the later stages of the disease, development of NO and other defense components (excluding lignin) were down-regulated, the production of reactive oxygen species in the form of H2O2 became elevated. Consequently, other stress markers, such as lipid peroxidation, proline content, and chlorophyll content, were changed accordingly. Correlation between the disease index and other defense molecules, along with NO, indicate that production of NO and reactive oxygen species (ROS) might influence the development of anthracnose in common bean.
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Affiliation(s)
| | - Kabita Mukherjee
- Department of Botany, Scottish Church College, Kolkata 700006, India.
| | - Anik Sarkar
- Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, University of Calcutta, Kolkata 700019, India.
| | - Krishnendu Acharya
- Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, University of Calcutta, Kolkata 700019, India.
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49
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Martínez-Medina A, Pescador L, Terrón-Camero LC, Pozo MJ, Romero-Puertas MC. Nitric oxide in plant-fungal interactions. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:4489-4503. [PMID: 31197351 DOI: 10.1093/jxb/erz289] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 06/05/2019] [Indexed: 05/17/2023]
Abstract
Whilst many interactions with fungi are detrimental for plants, others are beneficial and result in improved growth and stress tolerance. Thus, plants have evolved sophisticated mechanisms to restrict pathogenic interactions while promoting mutualistic relationships. Numerous studies have demonstrated the importance of nitric oxide (NO) in the regulation of plant defence against fungal pathogens. NO triggers a reprograming of defence-related gene expression, the production of secondary metabolites with antimicrobial properties, and the hypersensitive response. More recent studies have shown a regulatory role of NO during the establishment of plant-fungal mutualistic associations from the early stages of the interaction. Indeed, NO has been recently shown to be produced by the plant after the recognition of root fungal symbionts, and to be required for the optimal control of mycorrhizal symbiosis. Although studies dealing with the function of NO in plant-fungal mutualistic associations are still scarce, experimental data indicate that different regulation patterns and functions for NO exist between plant interactions with pathogenic and mutualistic fungi. Here, we review recent progress in determining the functions of NO in plant-fungal interactions, and try to identify common and differential patterns related to pathogenic and mutualistic associations, and their impacts on plant health.
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Affiliation(s)
- Ainhoa Martínez-Medina
- Plant-Microorganism Interaction Unit, Institute of Natural Resources and Agrobiology of Salamanca (IRNASA-CSIC), Salamanca, Spain
| | - Leyre Pescador
- Department of Biochemistry, Cell and Molecular Plant Biology, Estación Experimental del Zaidín (CSIC), Granada, Spain
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (CSIC), Granada, Spain
| | - Laura C Terrón-Camero
- Department of Biochemistry, Cell and Molecular Plant Biology, Estación Experimental del Zaidín (CSIC), Granada, Spain
| | - María J Pozo
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (CSIC), Granada, Spain
| | - María C Romero-Puertas
- Plant-Microorganism Interaction Unit, Institute of Natural Resources and Agrobiology of Salamanca (IRNASA-CSIC), Salamanca, Spain
- Department of Biochemistry, Cell and Molecular Plant Biology, Estación Experimental del Zaidín (CSIC), Granada, Spain
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50
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Izbiańska K, Floryszak-Wieczorek J, Gajewska J, Gzyl J, Jelonek T, Arasimowicz-Jelonek M. Switchable Nitroproteome States of Phytophthora infestans Biology and Pathobiology. Front Microbiol 2019; 10:1516. [PMID: 31379758 PMCID: PMC6647872 DOI: 10.3389/fmicb.2019.01516] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 06/18/2019] [Indexed: 11/25/2022] Open
Abstract
The study demonstrates protein tyrosine nitration as a functional post-translational modification (PTM) in biology and pathobiology of the oomycete Phytophthora infestans (Mont.) de Bary, the most harmful pathogen of potato (Solanum tuberosum L.). Using two P. infestans isolates differing in their virulence toward potato cv. Sarpo Mira we found that the pathogen generates reactive nitrogen species (RNS) in hyphae and mature sporangia growing under in vitro and in planta conditions. However, acceleration of peroxynitrite formation and elevation of the nitrated protein pool within pathogen structures were observed mainly during the avr P. infestans MP 946-potato interaction. Importantly, the nitroproteome profiles varied for the pathogen virulence pattern and comparative analysis revealed that vr MP 977 P. infestans represented a much more diverse quality spectrum of nitrated proteins. Abundance profiles of nitrated proteins that were up- or downregulated were substantially different also between the analyzed growth phases. Briefly, in planta growth of avr and vr P. infestans was accompanied by exclusive nitration of proteins involved in energy metabolism, signal transduction and pathogenesis. Importantly, the P. infestans-potato interaction indicated cytosolic RXLRs and Crinklers effectors as potential sensors of RNS. Taken together, we explored the first plant pathogen nitroproteome. The results present new insights into RNS metabolism in P. infestans indicating protein nitration as an integral part of pathogen biology, dynamically modified during its offensive strategy. Thus, the nitroproteome should be considered as a flexible element of the oomycete developmental and adaptive mechanism to different micro-environments, including host cells.
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Affiliation(s)
- Karolina Izbiańska
- Department of Plant Ecophysiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Jolanta Floryszak-Wieczorek
- Department of Plant Physiology, Faculty of Horticulture and Landscape Architecture, Poznań University of Life Sciences, Poznań, Poland
| | - Joanna Gajewska
- Department of Plant Ecophysiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Jarosław Gzyl
- Department of Plant Ecophysiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Tomasz Jelonek
- Department of Forest Utilization, Faculty of Forestry, Poznań University of Life Sciences, Poznań, Poland
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