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Su GM, Chu LW, Chien CC, Liao PS, Chiu YC, Chang CH, Chu TH, Li CH, Wu CS, Wang JF, Cheng YS, Chang CH, Cheng CP. Tomato NADPH oxidase SlWfi1 interacts with the effector protein RipBJ of Ralstonia solanacearum to mediate host defence. PLANT, CELL & ENVIRONMENT 2024. [PMID: 39132878 DOI: 10.1111/pce.15086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 05/30/2024] [Accepted: 07/31/2024] [Indexed: 08/13/2024]
Abstract
Reactive oxygen species (ROS) play a crucial role in regulating numerous functions in organisms. Among the key regulators of ROS production are NADPH oxidases, primarily referred to as respiratory burst oxidase homologues (RBOHs). However, our understanding of whether and how pathogens directly target RBOHs has been limited. In this study, we revealed that the effector protein RipBJ, originating from the phytopathogenic bacterium Ralstonia solanacearum, was present in low- to medium-virulence strains but absent in high-virulence strains. Functional genetic assays demonstrated that the expression of ripBJ led to a reduction in bacterial infection. In the plant, RipBJ expression triggered plant cell death and the accumulation of H2O2, while also enhancing host defence against R. solanacearum by modulating multiple defence signalling pathways. Through protein interaction and functional studies, we demonstrated that RipBJ was associated with the plant's plasma membrane and interacted with the tomato RBOH known as SlWfi1, which contributed positively to RipBJ's effects on plants. Importantly, SlWfi1 expression was induced during the early stages following R. solanacearum infection and played a key role in defence against this bacterium. This research uncovers the plant RBOH as an interacting target of a pathogen's effector, providing valuable insights into the mechanisms of plant defence.
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Affiliation(s)
- Guan-Ming Su
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Li-Wen Chu
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Chih-Cheng Chien
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
- Institute of Ecology and Evolutionary Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Pei-Shan Liao
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Yu-Chuan Chiu
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Chi-Hsin Chang
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Tai-Hsiang Chu
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Chien-Hui Li
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Chien-Sheng Wu
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Jaw-Fen Wang
- Bacteriology Unit, AVRDC-The World Vegetable Center, Tainan, Taiwan
| | - Yi-Sheng Cheng
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
- Department of Life Science, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Chuan-Hsin Chang
- Department of Research, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan
| | - Chiu-Ping Cheng
- Institute of Plant Biology, College of Life Science, National Taiwan University, Taipei, Taiwan
- Department of Life Science, College of Life Science, National Taiwan University, Taipei, Taiwan
- Global Agriculture Technology and Genomic Science Master Program, International College, National Taiwan University, Taipei, Taiwan
- Master Program for Plant Medicine, College of Bio-Resources & Agriculture, National Taiwan University, Taipei, Taiwan
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Yoshida R, Taguchi S, Wakita C, Serikawa S, Miyaji H. Companion basil plants prime the tomato wound response through volatile signaling in a mixed planting system. PLANT CELL REPORTS 2024; 43:200. [PMID: 39039312 PMCID: PMC11263239 DOI: 10.1007/s00299-024-03285-w] [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: 06/25/2024] [Accepted: 07/10/2024] [Indexed: 07/24/2024]
Abstract
KEY MESSAGE Volatile compounds released from basil prime the tomato wound response by promoting jasmonic acid, mitogen-activated protein kinase, and reactive oxygen species signaling. Within mixed planting systems, companion plants can promote growth or enhance stress responses in target plants. However, the mechanisms underlying these effects remain poorly understood. To gain insight into the molecular nature of the effects of companion plants, we investigated the effects of basil plants (Ocimum basilicum var. minimum) on the wound response in tomato plants (Solanum lycopersicum cv. 'Micro-Tom') within a mixed planting system under environmentally controlled chamber. The results showed that the expression of Pin2, which specifically responds to mechanical wounding, was induced more rapidly and more strongly in the leaves of tomato plants cultivated with companion basil plants. This wound response priming effect was replicated through the exposure of tomato plants to an essential oil (EO) prepared from basil leaves. Tomato leaves pre-exposed to basil EO showed enhanced expression of genes related to jasmonic acid, mitogen-activated protein kinase (MAPK), and reactive oxygen species (ROS) signaling after wounding stress. Basil EO also enhanced ROS accumulation in wounded tomato leaves. The wound response priming effect of basil EO was confirmed in wounded Arabidopsis plants. Loss-of-function analysis of target genes revealed that MAPK genes play pivotal roles in controlling the observed priming effects. Spodoptera litura larvae-fed tomato leaves pre-exposed to basil EO showed reduced growth compared with larvae-fed control leaves. Thus, mixed planting with basil may enhance defense priming in both tomato and Arabidopsis plants through the activation of volatile signaling.
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Affiliation(s)
- Riichiro Yoshida
- Laboratory of Horticultural Science, Faculty of Agriculture, Kagoshima University, 1-21-24 Kohrimoto, Kagoshima, 890-0065, Japan.
- The United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24 Kohrimoto, Kagoshima, 890-0065, Japan.
| | - Shoma Taguchi
- Laboratory of Horticultural Science, Faculty of Agriculture, Kagoshima University, 1-21-24 Kohrimoto, Kagoshima, 890-0065, Japan
| | - Chihiro Wakita
- Laboratory of Horticultural Science, Faculty of Agriculture, Kagoshima University, 1-21-24 Kohrimoto, Kagoshima, 890-0065, Japan
| | - Shinichiro Serikawa
- Laboratory of Horticultural Science, Faculty of Agriculture, Kagoshima University, 1-21-24 Kohrimoto, Kagoshima, 890-0065, Japan
| | - Hiroyuki Miyaji
- Laboratory of Horticultural Science, Faculty of Agriculture, Kagoshima University, 1-21-24 Kohrimoto, Kagoshima, 890-0065, Japan
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3
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Mogollón-Ortiz ÁM, Monteiro TSA, de Freitas LG, de Queiroz MV. Potential of different species of actinobacteria in the management of Meloidogyne javanica. Arch Microbiol 2024; 206:160. [PMID: 38483595 DOI: 10.1007/s00203-024-03874-z] [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: 10/11/2023] [Revised: 01/16/2024] [Accepted: 01/26/2024] [Indexed: 03/19/2024]
Abstract
Root-knot nematodes (RKN) are one of the most harmful soil-borne plant pathogens in the world. Actinobacteria are known phytopathogen control agents. The aim of this study was to select soil actinobacteria with control potential against the RKN (Meloidogyne javanica) in tomato plants and to determine mechanisms of action. Ten isolates were tested and a significant reduction was observed in the number of M. javanica eggs, and galls 46 days after infestation with the nematode. The results could be explained by the combination of different mechanisms including parasitism and induction of plant defense response. The M. javanica eggs were parasited by all isolates tested. Some isolates reduced the penetration of juveniles into the roots. Other isolates using the split-root method were able to induce systemic defenses in tomato plants. The 4L isolate was selected for analysis of the expression of the plant defense genes TomLoxA, ACCO, PR1, and RBOH1. In plants treated with 4L isolate and M. javanica, there was a significant increase in the number of TomLoxA and ACCO gene transcripts. In plants treated only with M. javanica, only the expression of the RBOH1 and PR1 genes was induced in the first hours after infection. The isolates were identified using 16S rRNA gene sequencing as Streptomyces sp. (1A, 3F, 4L, 6O, 8S, 9T, and 10U), Kribbella sp. (5N), Kitasatospora sp. (2AE), and Lentzea sp. (7P). The efficacy of isolates from the Kitasatospora, Kribbella, and Lentzea genera was reported for the first time, and the efficacy of Streptomyces genus isolates for controlling M. javanica was confirmed. All the isolates tested in this study were efficient against RKN. This study provides the opportunity to investigate bacterial genera that have not yet been explored in the control of M. javanica in tomatoes and other crops.
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Affiliation(s)
- Ángela María Mogollón-Ortiz
- Departamento de Microbiologia-Bioagro, Universidade Federal de Viçosa, Viçosa, Brazil
- Universidad de los Llanos, Villavicencio, Colombia
| | | | | | - Marisa Vieira de Queiroz
- Departamento de Microbiologia-Bioagro, Universidade Federal de Viçosa, Viçosa, Brazil.
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, Brazil.
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Zhu F, Cao MY, Zhang QP, Mohan R, Schar J, Mitchell M, Chen H, Liu F, Wang D, Fu ZQ. Join the green team: Inducers of plant immunity in the plant disease sustainable control toolbox. J Adv Res 2024; 57:15-42. [PMID: 37142184 PMCID: PMC10918366 DOI: 10.1016/j.jare.2023.04.016] [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: 02/20/2023] [Revised: 04/13/2023] [Accepted: 04/25/2023] [Indexed: 05/06/2023] Open
Abstract
BACKGROUND Crops are constantly attacked by various pathogens. These pathogenic microorganisms, such as fungi, oomycetes, bacteria, viruses, and nematodes, threaten global food security by causing detrimental crop diseases that generate tremendous quality and yield losses worldwide. Chemical pesticides have undoubtedly reduced crop damage; however, in addition to increasing the cost of agricultural production, the extensive use of chemical pesticides comes with environmental and social costs. Therefore, it is necessary to vigorously develop sustainable disease prevention and control strategies to promote the transition from traditional chemical control to modern green technologies. Plants possess sophisticated and efficient defense mechanisms against a wide range of pathogens naturally. Immune induction technology based on plant immunity inducers can prime plant defense mechanisms and greatly decrease the occurrence and severity of plant diseases. Reducing the use of agrochemicals is an effective way to minimize environmental pollution and promote agricultural safety. AIM OF REVIEW The purpose of this workis to offer valuable insights into the current understanding and future research perspectives of plant immunity inducers and their uses in plant disease control, ecological and environmental protection, and sustainable development of agriculture. KEY SCIENTIFIC CONCEPTS OF REVIEW In this work, we have introduced the concepts of sustainable and environment-friendly concepts of green disease prevention and control technologies based on plant immunity inducers. This article comprehensively summarizes these recent advances, emphasizes the importance of sustainable disease prevention and control technologies for food security, and highlights the diverse functions of plant immunity inducers-mediated disease resistance. The challenges encountered in the potential applications of plant immunity inducers and future research orientation are also discussed.
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Affiliation(s)
- Feng Zhu
- College of Plant Protection, Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu 225009, China.
| | - Meng-Yao Cao
- College of Plant Protection, Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Qi-Ping Zhang
- College of Plant Protection, Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | | | - Jacob Schar
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA
| | | | - Huan Chen
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA; Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory for Food Quality and Safety State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, Jiangsu 210014, China
| | - Fengquan Liu
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory for Food Quality and Safety State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, Jiangsu 210014, China
| | - Daowen Wang
- State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, and Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou 450002, China
| | - Zheng Qing Fu
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA.
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Yu Z, Zhang S, Sun L, Liang S, Zheng X, Ren H, Qi X. Effects of Enhanced Resistance and Transcriptome Analysis of Twig Blight Disease by Exogenous Brassinolide in Myrica rubra. Antioxidants (Basel) 2023; 13:61. [PMID: 38247485 PMCID: PMC10812535 DOI: 10.3390/antiox13010061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 12/28/2023] [Accepted: 12/28/2023] [Indexed: 01/23/2024] Open
Abstract
Twig blight disease is the primary disease that affects the production of Myrica rubra in China. It was reported that exogenous brassinolide (BL) can improve disease resistance in plants. Here, we examined the effects of exogenous BL on disease resistance, chlorophyll contents, antioxidant enzyme activity, ROS accumulation, and key gene expression of M. rubra to analyze the mechanism of BR-induced resistance of twig blight disease in M. rubra. The results demonstrated that 2.0 mg·L-1 of BL could significantly lessen the severity of twig blight disease in M. rubra. Exogenous BL increased the contents of chlorophyll a, chlorophyll b, carotenoids, and total chlorophyll. Moreover, exogenous BL also significantly enhanced the activity of antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), and decreased malondialdehyde (MDA) content and reactive oxygen species (ROS) accumulation in leaves, such as H2O2 and O2·-. Additionally, exogenous BL dramatically up-regulated the expression of pathogenesis-related (PR) genes such as MrPR1, MrPR2, and MrPR10, as well as important genes such as MrBAK1, MrBRI1, and MrBZR1 involved in brassinosteroid (BR) signaling pathway. The transcriptome analysis revealed that a total of 730 common differentially expressed genes (DEGs) under BL treatment were found, and these DEGs were primarily enriched in four Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways. Based on these findings, nine important candidate genes related to the resistance of twig blight disease under BL treatment were further identified. In this study, we elucidated the effects of exogenous BL on enhancing the resistance of M. rubra to twig blight disease and preliminary analyzed the potential mechanism of resistance induction, which will provide a crucial foundation for the management and prevention of twig blight disease in M. rubra.
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Affiliation(s)
- Zheping Yu
- State Key Laboratory for Managing Biotic and Chemical Threats to Quality and Safety of Agro-Products, Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Z.Y.)
| | - Shuwen Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to Quality and Safety of Agro-Products, Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Z.Y.)
| | - Li Sun
- State Key Laboratory for Managing Biotic and Chemical Threats to Quality and Safety of Agro-Products, Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Z.Y.)
| | - Senmiao Liang
- State Key Laboratory for Managing Biotic and Chemical Threats to Quality and Safety of Agro-Products, Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Z.Y.)
| | - Xiliang Zheng
- State Key Laboratory for Managing Biotic and Chemical Threats to Quality and Safety of Agro-Products, Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Z.Y.)
| | - Haiying Ren
- State Key Laboratory for Managing Biotic and Chemical Threats to Quality and Safety of Agro-Products, Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Z.Y.)
| | - Xingjiang Qi
- State Key Laboratory for Managing Biotic and Chemical Threats to Quality and Safety of Agro-Products, Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Z.Y.)
- Xianghu Laboratory, Hangzhou 311231, China
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6
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Malviya D, Singh P, Singh UB, Paul S, Kumar Bisen P, Rai JP, Verma RL, Fiyaz RA, Kumar A, Kumari P, Dei S, Ahmed MR, Bagyaraj DJ, Singh HV. Arbuscular mycorrhizal fungi-mediated activation of plant defense responses in direct seeded rice ( Oryza sativa L.) against root-knot nematode Meloidogyne graminicola. Front Microbiol 2023; 14:1104490. [PMID: 37200920 PMCID: PMC10185796 DOI: 10.3389/fmicb.2023.1104490] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 03/13/2023] [Indexed: 05/20/2023] Open
Abstract
Rhizosphere is the battlefield of beneficial and harmful (so called phytopathogens) microorganisms. Moreover, these microbial communities are struggling for their existence in the soil and playing key roles in plant growth, mineralization, nutrient cycling and ecosystem functioning. In the last few decades, some consistent pattern have been detected so far that link soil community composition and functions with plant growth and development; however, it has not been studied in detail. AM fungi are model organisms, besides potential role in nutrient cycling; they modulate biochemical pathways directly or indirectly which lead to better plant growth under biotic and abiotic stress conditions. In the present investigations, we have elucidated the AM fungi-mediated activation of plant defense responses against Meloidogyne graminicola causing root-knot disease in direct seeded rice (Oryza sativa L.). The study describes the multifarious effects of Funneliformis mosseae, Rhizophagus fasciculatus, and Rhizophagus intraradices inoculated individually or in combination under glasshouse conditions in rice plants. It was found that F. mosseae, R. fasciculatus and R. intraradices when applied individually or in combination modulated the biochemical and molecular mechanisms in the susceptible and resistant inbred lines of rice. AM inoculation significantly increased various plant growth attributes in plants with simultaneous decrease in the root-knot intensity. Among these, the combined application of F. mosseae, R. fasciculatus, and R. intraradices was found to enhance the accumulation and activities of biomolecules and enzymes related to defense priming as well as antioxidation in the susceptible and resistant inbred lines of rice pre-challenged with M. graminicola. The application of F. mosseae, R. fasciculatus and R. intraradices, induced the key genes involved in plant defense and signaling and it has been demonstrated for the first time. Results of the present investigation advocated that the application of F. mosseae, R. fasciculatus and R. intraradices, particularly a combination of all three, not only helped in the control of root-knot nematodes but also increased plant growth as well as enhances the gene expression in rice. Thus, it proved to be an excellent biocontrol as well as plant growth-promoting agent in rice even when the crop is under biotic stress of the root-knot nematode, M. graminicola.
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Affiliation(s)
- Deepti Malviya
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Maunath Bhanjan, India
| | - Prakash Singh
- Department of Plant Breeding and Genetics, Veer Kunwar Singh College of Agriculture, Bihar Agricultural University, Dumraon, India
| | - Udai B Singh
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Maunath Bhanjan, India
| | - Surinder Paul
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Maunath Bhanjan, India
| | | | - Jai P Rai
- Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India
| | - Ram Lakhan Verma
- Division of Crop Improvement, ICAR-National Rice Research Institute, Cuttack, India
| | - R Abdul Fiyaz
- Division of Crop Improvement, ICAR-Indian Institute of Rice Research, Hyderabad, India
| | - A Kumar
- Bihar Agricultural University, Bhagalpur, India
| | - Poonam Kumari
- Agrotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
| | | | - Mohd Reyaz Ahmed
- Department of Plant Pathology, Veer Kunwar Singh College of Agriculture, Bihar Agricultural University, Dumraon, India
| | - D J Bagyaraj
- Centre for Natural Biological Resources and Community Development, Bengaluru, India
| | - Harsh V Singh
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Maunath Bhanjan, India
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7
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Gaccione L, Martina M, Barchi L, Portis E. A Compendium for Novel Marker-Based Breeding Strategies in Eggplant. PLANTS (BASEL, SWITZERLAND) 2023; 12:1016. [PMID: 36903876 PMCID: PMC10005326 DOI: 10.3390/plants12051016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/06/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
The worldwide production of eggplant is estimated at about 58 Mt, with China, India and Egypt being the major producing countries. Breeding efforts in the species have mainly focused on increasing productivity, abiotic and biotic tolerance/resistance, shelf-life, the content of health-promoting metabolites in the fruit rather than decreasing the content of anti-nutritional compounds in the fruit. From the literature, we collected information on mapping quantitative trait loci (QTLs) affecting eggplant's traits following a biparental or multi-parent approach as well as genome-wide association (GWA) studies. The positions of QTLs were lifted according to the eggplant reference line (v4.1) and more than 700 QTLs were identified, here organized into 180 quantitative genomic regions (QGRs). Our findings thus provide a tool to: (i) determine the best donor genotypes for specific traits; (ii) narrow down QTL regions affecting a trait by combining information from different populations; (iii) pinpoint potential candidate genes.
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Ali Q, Yu C, Wang Y, Sheng T, Zhao X, Wu X, Jing L, Gu Q, Wu H, Gao X. High killing rate of nematode and promotion of rice growth by synthetic volatiles from Bacillus strains due to enhanced oxidative stress response. PHYSIOLOGIA PLANTARUM 2023; 175:e13868. [PMID: 36724171 DOI: 10.1111/ppl.13868] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/29/2022] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
The plant parasitic nematode Aphelenchoides besseyi is a major pest that poses serious threats to different vegetables and crop plants. In the present study, volatiles isolated from Bacillus spp. were utilized as green biocontrol agents to overcome nematodes. In in vitro experiment, Bacillus spp. GBSC56, SYST2, and FZB42 showed the strongest nematicidal activity with killing rates of 80.78%, 75.69%, and 60.45%, respectively, as compared with control. The selected synthetic volatile organic compounds (VOCs), namely albuterol, benzaldehyde (BDH), 1,2-benzisothiazol-3(2H)-one (1,2-HIT), dimethyl disulfide (DMDS), 2-undecanone (2-UD), and 1,3-propanediole (1,3-PD), exhibited strong nematicidal activity, with A. besseyi killing rate of 85.58%, 82.65%, 81.75%, 80.36%, 84.45%, and 82.36%, respectively, at 400 μg/mL. Microscopic analysis proved that the rapid mortality was due to the production of reactive oxygen species (ROS). Molecular docking attributed this ROS production to the nematicidal effect of synthetic VOCs on NADH DEHYDROGENASE SUBUNIT 2, which is known to play a critical role in the suppression of ROS in nematode models. In a greenhouse experiment, the Bacillus strains GBSC56, SYST2, and FZB42 and their synthetic VOCs significantly improved the physiological parameters in terms of growth promotion traits. In addition, selected genes related to growth promotion and defense genes showed a significant upregulation of their expression in rice seedlings treated with those synthetic VOCs. Overall, these findings revealed that the selected Bacillus strains and their synthetic VOCs possess high potential against A. besseyi. Moreover, this study also sheds new light on the mechanisms by which specific Bacillus nematicidal VOCs influence important genes involved in rice plant growth promotion and could effectively be used to suppress plant parasitic nematodes.
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Affiliation(s)
- Qurban Ali
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Chenjie Yu
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Yujie Wang
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Tao Sheng
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Xiaozhen Zhao
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Xiaohui Wu
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Liang Jing
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Qin Gu
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Huijun Wu
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Xuewen Gao
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
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9
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Sun K, Zhang X, Wei Z, Wang Z, Liu J, Liu J, Gao J, Guo J, Zhao X. Analysis of metabolic and transcription levels provides insights into the interactions of plant hormones and crosstalk with MAPKs in the early signaling response of cherry tomato fruit induced by the yeast cell wall. FOOD CHEMISTRY. MOLECULAR SCIENCES 2022; 6:100160. [PMID: 36619895 PMCID: PMC9816665 DOI: 10.1016/j.fochms.2022.100160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 12/09/2022] [Accepted: 12/24/2022] [Indexed: 12/27/2022]
Abstract
Yeast cell walls (YCW) are promising bio-based elicitors for controlling post-harvest fruit decay. In this study, 1% YCW induction increased the resistance of cherry tomato fruits, reducing disease incidence by 66%. This study aimed to explore the interaction of hormones and crosstalk with MAPKs (mitogen-activated protein kinases) in the early response of resistance regulation in cherry tomato fruits treated with YCW and U0126. We analyzed the temporal changes in hormone content, the expression of critical genes involved in phytohormone biosynthesis, and signal transduction in cherry tomato fruits response to the induction. Results revealed that jasmonic acid (JA) and brassinosteroids (BR) significantly regulated early resistance response in fruit induced by 1% YCW. The salicylic acid (SA) pathway is inhibited by the activation of the JA pathway. JA and SA signaling pathway crosstalk with the MAPK3 pathway. BR plays an essential role in the regulation of fruit resistance. The BR pathway may function independently when JA/SA and MAPK3 pathways are inhibited.
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Affiliation(s)
- Keyu Sun
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Quality and Health of Tianjin, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Xue Zhang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Quality and Health of Tianjin, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Ze Wei
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Quality and Health of Tianjin, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Ziwuzhen Wang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Quality and Health of Tianjin, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Jifeng Liu
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Quality and Health of Tianjin, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Jian Liu
- Institute of Health Quarantine, Chinese Academy of Inspection and Quarantine, Beijing 100176, China,Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute, Urumqi, Xinjiang 830011, China
| | - Jianhua Gao
- College of Life Sciences, Shanxi Agricultural University, Jinzhong, Shanxi 030801, China
| | - Jun Guo
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Quality and Health of Tianjin, Tianjin University of Science & Technology, Tianjin 300457, China,Corresponding authors.
| | - Xin Zhao
- Institute of Health Quarantine, Chinese Academy of Inspection and Quarantine, Beijing 100176, China,Corresponding authors.
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Korayem A, Safwat El- H, Shater Abd M, Abd El-Mon A, Mohamed Mo M, El-Ashry S. Physiological and Biochemical Changes in the Wheat Plant (Triticum aestivum L.) Infected with Nematodes. ASIAN JOURNAL OF PLANT SCIENCES 2022; 21:613-628. [DOI: 10.3923/ajps.2022.613.628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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11
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Goode K, Mitchum MG. Pattern-triggered immunity against root-knot nematode infection: A minireview. PHYSIOLOGIA PLANTARUM 2022; 174:e13680. [PMID: 35362104 PMCID: PMC9322311 DOI: 10.1111/ppl.13680] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 03/15/2022] [Accepted: 03/28/2022] [Indexed: 05/24/2023]
Abstract
Pattern-triggered immunity (PTI) is the basal level of defense a plant has against pathogens. In the case of root-knot nematodes (RKN), PTI relies on the recognition of nematode-associated molecular patterns (NAMPs) for activation. Nematodes have successfully overcome PTI many times by evolving effector proteins to combat PTI responses. As a result, much study has focused on effector-triggered immunity (ETI). Here, we highlight recent advances in our understanding of PTI against RKN. A new interest in understanding PTI in response to RKN infection shows that understanding the basal defense responses RKN have overcome provides critical insight into what mechanisms the effectors have evolved to target in the host plant.
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Affiliation(s)
- Kelly Goode
- Institute of Plant Breeding, Genetics, and GenomicsUniversity of GeorgiaAthensGeorgiaUSA
| | - Melissa G. Mitchum
- Institute of Plant Breeding, Genetics, and GenomicsUniversity of GeorgiaAthensGeorgiaUSA
- Department of Plant PathologyUniversity of GeorgiaAthensGeorgiaUSA
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12
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Ghorbel M, Brini F, Sharma A, Landi M. Role of jasmonic acid in plants: the molecular point of view. PLANT CELL REPORTS 2021; 40:1471-1494. [PMID: 33821356 DOI: 10.1007/s00299-021-02687-4] [Citation(s) in RCA: 95] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/23/2021] [Indexed: 05/12/2023]
Abstract
Recent updates in JA biosynthesis, signaling pathways and the crosstalk between JA and others phytohormones in relation with plant responses to different stresses. In plants, the roles of phytohormone jasmonic acid (JA), amino acid conjugate (e.g., JA-Ile) and their derivative emerged in last decades as crucial signaling compounds implicated in stress defense and development in plants. JA has raised a great interest, and the number of researches on JA has increased rapidly highlighting the importance of this phytohormone in plant life. First, JA was considered as a stress hormone implicated in plant response to biotic stress (pathogens and herbivores) which confers resistance to biotrophic and hemibiotrophic pathogens contrarily to salicylic acid (SA) which is implicated in plant response to necrotrophic pathogens. JA is also implicated in plant responses to abiotic stress (such as soil salinity, wounding and UV). Moreover, some researchers have recently revealed that JA controls several physiological processes like root growth, growth of reproductive organs and, finally, plant senescence. JA is also involved in the biosynthesis of various metabolites (e.g., phytoalexins and terpenoids). In plants, JA signaling pathways are well studied in few plants essentially Arabidopsis thaliana, Nicotiana benthamiana, and Oryza sativa L. confirming the crucial role of this hormone in plants. In this review, we highlight the last foundlings about JA biosynthesis, JA signaling pathways and its implication in plant maturation and response to environmental constraints.
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Affiliation(s)
- Mouna Ghorbel
- Biology Department, Faculty of Science, University of Ha'il, P.O. box, Ha'il, 2440, Saudi Arabia
- Laboratory of Biotechnology and Plant Improvement, Center of Biotechnology of Sfax, B.P '1177', 3018, Sfax, Tunisia
| | - Faiçal Brini
- Laboratory of Biotechnology and Plant Improvement, Center of Biotechnology of Sfax, B.P '1177', 3018, Sfax, Tunisia
| | - Anket Sharma
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
| | - Marco Landi
- Department of Agriculture, Food and Environment - University of Pisa, 56124, Pisa, Italy.
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13
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Role of Trichoderma as a biocontrol agent (BCA) of phytoparasitic nematodes and plant growth inducer. J Invertebr Pathol 2021; 183:107626. [PMID: 34081963 DOI: 10.1016/j.jip.2021.107626] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 01/25/2023]
Abstract
Nematodes as plant pathogens adversely affect food, fiber, and biofuels production by causing plant diseases. A variety of chemical nematicides are being applied to soil, seeds, or foliage with a goal of disease prevention. Despite the proven efficacy of these chemicals against plant-parasitic nematodes, factors like prolonged residual toxicity to human health, environmental pollution, and the risk of resistance development can't be neglected. Due to these reasons, many chemicals are being banned continuously or delimited in the crop production system. Alternatively, the need for long-term strategies and integrative approaches to control plant diseases is inevitable. Trichoderma spp. are widely used in agriculture as biological control agents (BCA). To our knowledge, either very little or no information available on the most recent developments regarding Trichoderma-mediated biological control of plant-parasitic nematodes. This review summarizes the recent advances in using Trichoderma as BCA and plant growth regulator with a special focus on plant-parasitic nematodes.
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14
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Ayaz M, Ali Q, Farzand A, Khan AR, Ling H, Gao X. Nematicidal Volatiles from Bacillus atrophaeus GBSC56 Promote Growth and Stimulate Induced Systemic Resistance in Tomato against Meloidogyne incognita. Int J Mol Sci 2021; 22:5049. [PMID: 34068779 PMCID: PMC8126219 DOI: 10.3390/ijms22095049] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 05/06/2021] [Accepted: 05/07/2021] [Indexed: 12/17/2022] Open
Abstract
Bacillus volatiles to control plant nematodes is a topic of great interest among researchers due to its safe and environmentally friendly nature. Bacillus strain GBSC56 isolated from the Tibet region of China showed high nematicidal activity against M. incognita, with 90% mortality as compared with control in a partition plate experiment. Pure volatiles produced by GBSC56 were identified through gas chromatography and mass spectrometry (GC-MS). Among 10 volatile organic compounds (VOCs), 3 volatiles, i.e., dimethyl disulfide (DMDS), methyl isovalerate (MIV), and 2-undecanone (2-UD) showed strong nematicidal activity with a mortality rate of 87%, 83%, and 80%, respectively, against M. incognita. The VOCs induced severe oxidative stress in nematodes, which caused rapid death. Moreover, in the presence of volatiles, the activity of antioxidant enzymes, i.e., SOD, CAT, POD, and APX, was observed to be enhanced in M. incognita-infested roots, which might reduce the adverse effect of oxidative stress-induced after infection. Moreover, genes responsible for plant growth promotion SlCKX1, SlIAA1, and Exp18 showed an upsurge in expression, while AC01 was downregulated in infested plants. Furthermore, the defense-related genes (PR1, PR5, and SlLOX1) in infested tomato plants were upregulated after treatment with MIV and 2-UD. These findings suggest that GBSC56 possesses excellent biocontrol potential against M. incognita. Furthermore, the study provides new insight into the mechanism by which GBSC56 nematicidal volatiles regulate antioxidant enzymes, the key genes involved in plant growth promotion, and the defense mechanism M. incognita-infested tomato plants use to efficiently manage root-knot disease.
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Affiliation(s)
- Muhammad Ayaz
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; (M.A.); (Q.A.); (A.R.K.)
| | - Qurban Ali
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; (M.A.); (Q.A.); (A.R.K.)
| | - Ayaz Farzand
- Department of Plant Pathology, University of Agriculture, Faisalabad P.O. Box 38040, Pakistan;
| | - Abdur Rashid Khan
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; (M.A.); (Q.A.); (A.R.K.)
| | - Hongli Ling
- Shandong Vland Biotechnology Co., Ltd., Binzhou 251700, China;
| | - Xuewen Gao
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; (M.A.); (Q.A.); (A.R.K.)
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15
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Guang Y, Luo S, Ahammed GJ, Xiao X, Li J, Zhou Y, Yang Y. The OPR gene family in watermelon: Genome-wide identification and expression profiling under hormone treatments and root-knot nematode infection. PLANT BIOLOGY (STUTTGART, GERMANY) 2021; 23 Suppl 1:80-88. [PMID: 33275831 DOI: 10.1111/plb.13225] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/10/2020] [Accepted: 11/26/2020] [Indexed: 05/26/2023]
Abstract
The enzyme 12-oxo-phytodienoic acid reductase (OPR) is important in the jasmonic acid (JA) biosynthesis pathway and thus plays a vital role in plant defence. However, systematic and comprehensive analyses of OPR genes in watermelon and their roles in defence responses are extremely limited. The physicochemical properties, phylogenetic tree, gene structure and cis-acting elements of watermelon OPR genes were analysed using bioinformatics, and qRT-PCR and RNA-Seq were applied to assay expression of OPR genes in watermelon. A total of five OPR family genes were identified in watermelon, which were unevenly distributed across the four chromosomes. Phylogenetic analysis assigned OPR members from different plant species to five subfamilies (OPRI-OPRV). The motif compositions of OPR members were relatively conserved. Expression analysis using qRT-PCR revealed that ClOPR genes, except for ClOPR5, were highly expressed in the flower and fruit. RNA-seq analysis showed that the ClOPR genes had different expression patterns during flesh and rind development. Furthermore, the ClOPR genes, particularly ClOPR2 and ClOPR4, were significantly upregulated by exogenous JA, salicylic acid (SA) and ethylene (ET) treatments. In addition, red light induced expression of ClOPR2 and ClOPR4 in leaves and roots of root-knot nematode (RKN)-infected watermelon plants, suggesting their involvement in red light-induced defence against RKN. These results provide a theoretical basis for elucidating the diverse functions of OPR family genes in watermelon.
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Affiliation(s)
- Y Guang
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, China
| | - S Luo
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, China
| | - G J Ahammed
- College of Horticulture and Plant Proection, Henan University of Science and Technology, Luoyang, 471023, China
| | - X Xiao
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, China
| | - J Li
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, China
| | - Y Zhou
- Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, China
| | - Y Yang
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, China
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16
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Salava H, Thula S, Mohan V, Kumar R, Maghuly F. Application of Genome Editing in Tomato Breeding: Mechanisms, Advances, and Prospects. Int J Mol Sci 2021; 22:E682. [PMID: 33445555 PMCID: PMC7827871 DOI: 10.3390/ijms22020682] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 12/31/2020] [Accepted: 01/05/2021] [Indexed: 12/19/2022] Open
Abstract
Plants regularly face the changing climatic conditions that cause biotic and abiotic stress responses. The abiotic stresses are the primary constraints affecting crop yield and nutritional quality in many crop plants. The advances in genome sequencing and high-throughput approaches have enabled the researchers to use genome editing tools for the functional characterization of many genes useful for crop improvement. The present review focuses on the genome editing tools for improving many traits such as disease resistance, abiotic stress tolerance, yield, quality, and nutritional aspects of tomato. Many candidate genes conferring tolerance to abiotic stresses such as heat, cold, drought, and salinity stress have been successfully manipulated by gene modification and editing techniques such as RNA interference, insertional mutagenesis, and clustered regularly interspaced short palindromic repeat (CRISPR/Cas9). In this regard, the genome editing tools such as CRISPR/Cas9, which is a fast and efficient technology that can be exploited to explore the genetic resources for the improvement of tomato and other crop plants in terms of stress tolerance and nutritional quality. The review presents examples of gene editing responsible for conferring both biotic and abiotic stresses in tomato simultaneously. The literature on using this powerful technology to improve fruit quality, yield, and nutritional aspects in tomato is highlighted. Finally, the prospects and challenges of genome editing, public and political acceptance in tomato are discussed.
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Affiliation(s)
- Hymavathi Salava
- Department of Plant Sciences, University of Hyderabad, Hyderabad 500064, India;
| | - Sravankumar Thula
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology (CEITEC), Masaryk University, Kamenice 5, CZ-625 00 Brno, Czech Republic;
| | - Vijee Mohan
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA;
| | - Rahul Kumar
- Plant Translational Research Laboratory, Department of Plant Sciences, University of Hyderabad, Hyderabad 500064, India;
| | - Fatemeh Maghuly
- Plant Functional Genomics, Institute of Molecular Biotechnology, Department of Biotechnology, BOKU-VIBT, University of Natural Resources and Life Sciences, 1190 Vienna, Austria
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17
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Desmedt W, Mangelinckx S, Kyndt T, Vanholme B. A Phytochemical Perspective on Plant Defense Against Nematodes. FRONTIERS IN PLANT SCIENCE 2020; 11:602079. [PMID: 33281858 PMCID: PMC7691236 DOI: 10.3389/fpls.2020.602079] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 10/21/2020] [Indexed: 05/23/2023]
Abstract
Given the large yield losses attributed to plant-parasitic nematodes and the limited availability of sustainable control strategies, new plant-parasitic nematode control strategies are urgently needed. To defend themselves against nematode attack, plants possess sophisticated multi-layered immune systems. One element of plant immunity against nematodes is the production of small molecules with anti-nematode activity, either constitutively or after nematode infection. This review provides an overview of such metabolites that have been identified to date and groups them by chemical class (e.g., terpenoids, flavonoids, glucosinolates, etc.). Furthermore, this review discusses strategies that have been used to identify such metabolites and highlights the ways in which studying anti-nematode metabolites might be of use to agriculture and crop protection. Particular attention is given to emerging, high-throughput approaches for the identification of anti-nematode metabolites, in particular the use of untargeted metabolomics techniques based on nuclear magnetic resonance (NMR) and mass spectrometry (MS).
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Affiliation(s)
- Willem Desmedt
- Research Group Epigenetics and Defense, Department of Biotechnology, Ghent University, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- VIB Center for Plant Systems Biology, Ghent, Belgium
| | - Sven Mangelinckx
- Research Group Synthesis, Bioresources and Bioorganic Chemistry (SynBioC), Department of Green Chemistry and Technology, Ghent University, Ghent, Belgium
| | - Tina Kyndt
- Research Group Epigenetics and Defense, Department of Biotechnology, Ghent University, Ghent, Belgium
| | - Bartel Vanholme
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- VIB Center for Plant Systems Biology, Ghent, Belgium
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18
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Wixom AQ, Casavant NC, Sonnen TJ, Kuhl JC, Xiao F, Dandurand LM, Caplan AB. Initial responses of the trap-crop, Solanum sisymbriifolium, to Globodera pallida invasions. THE PLANT GENOME 2020; 13:e20016. [PMID: 33016605 DOI: 10.1002/tpg2.20016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 01/02/2020] [Accepted: 02/22/2020] [Indexed: 06/11/2023]
Abstract
Many researchers today are looking for mechanisms underlying plant defenses against nematodes by identifying differentially expressed genes in domesticated hosts. In order to provide a different perspective, we analyzed the root transcriptome of an undomesticated non-host species, Solanum sisymbriifolium Lamark (SSI) before and after Globodera pallida infection. Utilizing RNAseq analyses, we identified changes in the expression of 277 transcripts. Many of these genes were not annotated; however, the annotated set included peroxidases, reactive oxygen species-producing proteins, and regulators of cell death. Importantly, 60% of the nematode-responsive genes did not respond to physical damage to root tissues, or to exogenous treatments with either salicylic acid or methyl jasmonate. Based on this, we speculate that the majority of changes in SSI gene expression were promoted by either nematode effectors, pathogen-associated molecular patterns (PAMPs), or by exposure to untested endogenous signaling molecules such as ethylene, or by exposure to multiple stimuli. This study incorporates our findings into a model that accounts for part of this plant's unusual resistance to nematodes.
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Affiliation(s)
- Alexander Q Wixom
- Department of Plant Sciences, University of Idaho, Moscow, ID, 83844-2333, USA
| | - N Carol Casavant
- Department of Plant Sciences, University of Idaho, Moscow, ID, 83844-2333, USA
| | | | - Joseph C Kuhl
- Department of Plant Sciences, University of Idaho, Moscow, ID, 83844-2333, USA
| | - Fangming Xiao
- Department of Plant Sciences, University of Idaho, Moscow, ID, 83844-2333, USA
| | - Louise-Marie Dandurand
- Department of Entomology, Plant Pathology, and Nematology, University of Idaho, Moscow, ID, 83844-2329, USA
| | - Allan B Caplan
- Department of Plant Sciences, University of Idaho, Moscow, ID, 83844-2333, USA
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19
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Zhang XN, Liao YWK, Wang XR, Zhang L, Ahammed GJ, Li QY, Li X. Epigallocatechin-3-gallate enhances tomato resistance to tobacco mosaic virus by modulating RBOH1-dependent H 2O 2 signaling. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 150:263-269. [PMID: 32171165 DOI: 10.1016/j.plaphy.2020.03.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 03/03/2020] [Accepted: 03/06/2020] [Indexed: 06/10/2023]
Abstract
Tobacco mosaic virus (TMV) is one of the most damaging plant viruses from an economic and research point of view. Epigallocatechin-3-Gallate (EGCG), a flavonoid type secondary metabolite can selectively improve plant defense against pathogens; however, the effect of EGCG on plant defense against TMV and the underlying mechanism(s) remain elusive. In this study, exogenous EGCG application increased plant resistance to TMV as revealed by significantly decreased transcript levels of TMV-coat protein (CP) in tomato leaves. A time-course of H2O2 concentrations in tomato leaves showed that TMV inoculation rapidly increased the H2O2 accumulation, reaching its peak at 3 days post-inoculation (dpi) which remained the highest until 6 dpi. However, the combined treatment of EGCG and TMV remarkably decreased the concentrations of H2O2 at 3 and 6 dpi. Meanwhile, the transcript levels of RESPIRATORY BURST OXIDASE HOMOLOG 1 (SlRBOH1) were significantly increased by either EGCG or TMV inoculation, but the EGCG treatment along with TMV caused a further upregulation in the SlRBOH1 transcripts compared with that in only TMV-inoculated plants. Chemical scavenging of H2O2 or silencing SlRBOH1 both compromised the EGCG-induced enhanced resistance to TMV. Furthermore, EGCG-induced elevation in the activity of antioxidant enzymes was abolished by SlRBOH1 silencing, suggesting that EGCG enhanced defense against TMV by increasing the antioxidant enzyme activity via RBOH1-dependent H2O2 signaling. Taken together, our results suggest that EGCG functioned to maintain a delicate balance between ROS signaling and ROS scavenging via RBOH1, which enhanced tomato resistance to TMV.
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Affiliation(s)
- Xue-Ning Zhang
- College of Horticulture, Hebei Agricultural University, Baoding, 071000, PR China; Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, PR China
| | - Yang-Wen-Ke Liao
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing, 210037, PR China
| | - Xiao-Rong Wang
- School of Economics and Management, Hebei University of Architecture, Zhangjiakou, 075000, PR China
| | - Lan Zhang
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, PR China
| | - Golam Jalal Ahammed
- College of Forestry, Henan University of Science and Technology, Luoyang, 471023, PR China.
| | - Qing-Yun Li
- College of Horticulture, Hebei Agricultural University, Baoding, 071000, PR China.
| | - Xin Li
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, PR China.
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20
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Jin JF, Wang ZQ, He QY, Wang JY, Li PF, Xu JM, Zheng SJ, Fan W, Yang JL. Genome-wide identification and expression analysis of the NAC transcription factor family in tomato (Solanum lycopersicum) during aluminum stress. BMC Genomics 2020; 21:288. [PMID: 32264854 PMCID: PMC7140551 DOI: 10.1186/s12864-020-6689-7] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 03/19/2020] [Indexed: 01/28/2023] Open
Abstract
Background The family of NAC proteins (NAM, ATAF1/2, and CUC2) represent a class of large plant-specific transcription factors. However, identification and functional surveys of NAC genes of tomato (Solanum lycopersicum) remain unstudied, despite the tomato genome being decoded for several years. This study aims to identify the NAC gene family and investigate their potential roles in responding to Al stress. Results Ninety-three NAC genes were identified and named in accordance with their chromosome location. Phylogenetic analysis found SlNACs are broadly distributed in 5 groups. Gene expression analysis showed that SlNACs had different expression levels in various tissues and at different fruit development stages. Cycloheximide treatment and qRT-PCR analysis indicated that SlNACs may aid regulation of tomato in response to Al stress, 19 of which were significantly up- or down-regulated in roots of tomato following Al stress. Conclusion This work establishes a knowledge base for further studies on biological functions of SlNACs in tomato and will aid in improving agricultural traits of tomato in the future.
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Affiliation(s)
- Jian Feng Jin
- State Key Laboratory of Plant Physiology and Biochemistry, Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Zhan Qi Wang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou, 313000, China
| | - Qi Yu He
- State Key Laboratory of Plant Physiology and Biochemistry, Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Jia Yi Wang
- State Key Laboratory of Plant Physiology and Biochemistry, Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Peng Fei Li
- State Key Laboratory of Plant Physiology and Biochemistry, Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Ji Ming Xu
- State Key Laboratory of Plant Physiology and Biochemistry, Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Shao Jian Zheng
- State Key Laboratory of Plant Physiology and Biochemistry, Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Wei Fan
- College of Resources and Environment, Yunnan Agricultural University, Kunming, 650201, China
| | - Jian Li Yang
- State Key Laboratory of Plant Physiology and Biochemistry, Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China.
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21
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Zhou Y, Zhao D, Shuang L, Xiao D, Xuan Y, Duan Y, Chen L, Wang Y, Liu X, Fan H, Zhu X. Transcriptome Analysis of Rice Roots in Response to Root-Knot Nematode Infection. Int J Mol Sci 2020; 21:ijms21030848. [PMID: 32013011 PMCID: PMC7037758 DOI: 10.3390/ijms21030848] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 01/24/2020] [Accepted: 01/27/2020] [Indexed: 12/12/2022] Open
Abstract
Meloidogyne incognita and Meloidogyne graminicola are root-knot nematodes (RKNs) infecting rice (Oryza sativa L.) roots and severely decreasing yield, whose mechanisms of action remain unclear. We investigated RKN invasion and development in rice roots through RNA-seq transcriptome analysis. The results showed that 952 and 647 genes were differently expressed after 6 (invasion stage) and 18 (development stage) days post inoculation, respectively. Gene annotation showed that the differentially expressed genes were classified into diverse metabolic and stress response categories. Furthermore, phytohormone, transcription factor, redox signaling, and defense response pathways were enriched upon RKN infection. RNA-seq validation using qRT-PCR confirmed that CBL-interacting protein kinase (CIPK) genes (CIPK5, 8, 9, 11, 14, 23, 24, and 31) as well as brassinosteroid (BR)-related genes (OsBAK1, OsBRI1, D2, and D11) were altered by RKN infection. Analysis of the CIPK9 mutant and overexpressor indicated that the RKN populations were smaller in cipk9 and larger in CIPK9 OX, while more galls were produced in CIPK9 OX plant roots than the in wild-type roots. Significantly fewer numbers of second-stage infective juveniles (J2s) were observed in the plants expressing the BR biosynthesis gene D2 mutant and the BR receptor BRI1 activation-tagged mutant (bri1-D), and fewer galls were observed in bri1-D roots than in wild-type roots. The roots of plants expressing the regulator of ethylene signaling ERS1 (ethylene response sensor 1) mutant contained higher numbers of J2s and developed more galls compared with wild-type roots, suggesting that these signals function in RKN invasion or development. Our findings broaden our understanding of rice responses to RKN invasion and provide useful information for further research on RKN defense mechanisms.
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Affiliation(s)
- Yuan Zhou
- College of Plant Protection, Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang 110866, China; (Y.Z.); (D.Z.); (D.X.); (Y.X.); (Y.D.); (L.C.); (Y.W.); (X.L.); (H.F.)
| | - Di Zhao
- College of Plant Protection, Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang 110866, China; (Y.Z.); (D.Z.); (D.X.); (Y.X.); (Y.D.); (L.C.); (Y.W.); (X.L.); (H.F.)
| | - Li Shuang
- Shaanxi Key Laboratory of Chinese Jujube, College of Life Science, Yan’an University, Yan’an, Shaanxi 716000, China;
| | - Dongxue Xiao
- College of Plant Protection, Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang 110866, China; (Y.Z.); (D.Z.); (D.X.); (Y.X.); (Y.D.); (L.C.); (Y.W.); (X.L.); (H.F.)
| | - Yuanhu Xuan
- College of Plant Protection, Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang 110866, China; (Y.Z.); (D.Z.); (D.X.); (Y.X.); (Y.D.); (L.C.); (Y.W.); (X.L.); (H.F.)
| | - Yuxi Duan
- College of Plant Protection, Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang 110866, China; (Y.Z.); (D.Z.); (D.X.); (Y.X.); (Y.D.); (L.C.); (Y.W.); (X.L.); (H.F.)
| | - Lijie Chen
- College of Plant Protection, Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang 110866, China; (Y.Z.); (D.Z.); (D.X.); (Y.X.); (Y.D.); (L.C.); (Y.W.); (X.L.); (H.F.)
| | - Yuanyuan Wang
- College of Plant Protection, Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang 110866, China; (Y.Z.); (D.Z.); (D.X.); (Y.X.); (Y.D.); (L.C.); (Y.W.); (X.L.); (H.F.)
| | - Xiaoyu Liu
- College of Plant Protection, Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang 110866, China; (Y.Z.); (D.Z.); (D.X.); (Y.X.); (Y.D.); (L.C.); (Y.W.); (X.L.); (H.F.)
| | - Haiyan Fan
- College of Plant Protection, Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang 110866, China; (Y.Z.); (D.Z.); (D.X.); (Y.X.); (Y.D.); (L.C.); (Y.W.); (X.L.); (H.F.)
| | - Xiaofeng Zhu
- College of Plant Protection, Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang 110866, China; (Y.Z.); (D.Z.); (D.X.); (Y.X.); (Y.D.); (L.C.); (Y.W.); (X.L.); (H.F.)
- Correspondence: ; Tel.: +86-135-1603-9056
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Li H, Jiang X, Lv X, Ahammed GJ, Guo Z, Qi Z, Yu J, Zhou Y. Tomato GLR3.3 and GLR3.5 mediate cold acclimation-induced chilling tolerance by regulating apoplastic H 2 O 2 production and redox homeostasis. PLANT, CELL & ENVIRONMENT 2019; 42:3326-3339. [PMID: 31329293 DOI: 10.1111/pce.13623] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/23/2019] [Accepted: 07/18/2019] [Indexed: 05/26/2023]
Abstract
Plant glutamate receptor-like (GLR) genes play important roles in plant development and immune response. However, the functions of GLRs in abiotic stress response remain unclear. Here we show that cold acclimation at 12°C induced the transcripts of GLR3.3 and GLR3.5 with increased tolerance against a subsequent chilling at 4 °C. Silencing of GLR3.3 or/and GLR3.5 or application of the antagonist of ionotropic glutamate receptor 6,7-dinitroquinoxaline-2,3-dione (DNQX), all compromised the acclimation-induced increases in the transcripts of respiratory burst oxidase homolog1 (RBOH1), activity of NADPH oxidase, the accumulation of apoplastic H2 O2 and the ratio of reduced glutathione (GSH) to oxidized glutathione (GSSG), resulting in an attenuated chilling tolerance; the effect, however, was rescued by foliar application of H2 O2 or GSH. Both RBOH1-silenced and glutathione biosynthesis genes, γ- glutamylcysteine synthetase (GSH1)- and glutathione synthetase (GSH2)-cosilenced plants had decreased chilling tolerance with reduced GSH/GSSG ratio. Moreover, application of DNQX had little effects on the GSH/GSSG ratio and the tolerance in RBOH1-silenced plants and GSH1- and GSH2-cosilenced plants. These findings unmasked the functional hierarchy of GLR-H2 O2 -glutathione cascade and shed new light on cold response pathway in tomato plants.
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Affiliation(s)
- Huizi Li
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
| | - Xiaochun Jiang
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
| | - Xiangzhang Lv
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
| | - Golam Jalal Ahammed
- College of Forestry, Henan University of Science and Technology, Luoyang, 471000, P.R. China
| | - Zhixin Guo
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
| | - Zhenyu Qi
- Zhejiang Univ, Agr Expt Stn, Hangzhou, 310058, P.R. China
| | - Jingquan Yu
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
| | - Yanhong Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Hangzhou, 310058, P.R. China
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23
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Westman SM, Kloth KJ, Hanson J, Ohlsson AB, Albrectsen BR. Defence priming in Arabidopsis - a Meta-Analysis. Sci Rep 2019; 9:13309. [PMID: 31527672 PMCID: PMC6746867 DOI: 10.1038/s41598-019-49811-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 08/31/2019] [Indexed: 12/18/2022] Open
Abstract
Defence priming by organismal and non-organismal stimulants can reduce effects of biotic stress in plants. Thus, it could help efforts to enhance the sustainability of agricultural production by reducing use of agrochemicals in protection of crops from pests and diseases. We have explored effects of applying this approach to both Arabidopsis plants and seeds of various crops in meta-analyses. The results show that its effects on Arabidopsis plants depend on both the priming agent and antagonist. Fungi and vitamins can have strong priming effects, and priming is usually more effective against bacterial pathogens than against herbivores. Moreover, application of bio-stimulants (particularly vitamins and plant defence elicitors) to seeds can have promising defence priming effects. However, the published evidence is scattered, does not include Arabidopsis, and additional studies are required before we can draw general conclusions and understand the molecular mechanisms involved in priming of seeds' defences. In conclusion, defence priming of plants has clear potential and application of bio-stimulants to seeds may protect plants from an early age, promises to be both labour- and resource-efficient, poses very little environmental risk, and is thus both economically and ecologically promising.
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Affiliation(s)
- Sara M Westman
- Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, Umeå Plant Science Centre, Umeå, Sweden
| | - Karen J Kloth
- Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, Umeå Plant Science Centre, Umeå, Sweden
- Laboratory of Entomology, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, The Netherlands
| | - Johannes Hanson
- Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, Umeå Plant Science Centre, Umeå, Sweden
| | - Anna B Ohlsson
- Department of Industrial Biotechnology, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), KTH Royal Institute of Technology, Stockholm, Sweden
| | - Benedicte R Albrectsen
- Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, Umeå Plant Science Centre, Umeå, Sweden.
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24
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Yu W, Wang L, Zhao R, Sheng J, Zhang S, Li R, Shen L. Knockout of SlMAPK3 enhances tolerance to heat stress involving ROS homeostasis in tomato plants. BMC PLANT BIOLOGY 2019; 19:354. [PMID: 31412779 PMCID: PMC6694692 DOI: 10.1186/s12870-019-1939-z] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 07/12/2019] [Indexed: 05/20/2023]
Abstract
BACKGROUND High temperature is a major environmental stress that limits plant growth and agriculture productivity. Mitogen-activated protein kinases (MAPKs) are highly conserved serine and threonine protein kinases that participate in response to diverse environmental stresses in plants. A total of 16 putative SlMAPK genes are identified in tomato, and SlMAPK3 is one of the most extensively studied SlMAPKs. However, the role of SlMAPK3 in response to heat stress is not clearly understood in tomato plants. In this study, we performed functional analysis of SlMAPK3 for its possible role in response to heat stress. RESULTS qRT-PCR analyses revealed that SlMAPK3 relative expression was depressed by heat stress. Here, wild-type (WT) tomato plants and CRISPR/Cas9-mediated slmapk3 mutant lines (L8 and L13) were used to investigate the function of SlMAPK3 in response to heat stress. Compared with WT plants, slmapk3 mutants exhibited less severe wilting and less membrane damage, showed lower reactive oxygen species (ROS) contents, and presented higher both activities and transcript levels of antioxidant enzymes, as well as elevated expressions of genes encoding heat stress transcription factors (HSFs) and heat shock proteins (HSPs). CONCLUSIONS CRISPR/Cas9-mediated slmapk3 mutants exhibited more tolerance to heat stress than WT plants, suggesting that SlMAPK3 was a negative regulator of thermotolerance. Moreover, antioxidant enzymes and HSPs/HSFs genes expression were involved in SlMAPK3-mediated heat stress response in tomato plants.
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Affiliation(s)
- Wenqing Yu
- College of Food Science and Nutritional Engineer Engineering, China Agricultural University, Beijing, 100083, China
| | - Liu Wang
- College of Food Science and Nutritional Engineer Engineering, China Agricultural University, Beijing, 100083, China
| | - Ruirui Zhao
- College of Food Science and Nutritional Engineer Engineering, China Agricultural University, Beijing, 100083, China
| | - Jiping Sheng
- School of Agricultural Economics and Rural Development, Renmin University of China, Beijing, 100872, China
| | - Shujuan Zhang
- College of Food Science and Nutritional Engineer Engineering, China Agricultural University, Beijing, 100083, China
| | - Rui Li
- College of Food Science and Nutritional Engineer Engineering, China Agricultural University, Beijing, 100083, China
| | - Lin Shen
- College of Food Science and Nutritional Engineer Engineering, China Agricultural University, Beijing, 100083, China.
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25
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Efimova MV, Litvinovskaya RP, Medvedeva YV, Murgan OK, Sauchuk AL, Kuznetsov VV, Khripach VA. The Endogenous Brassinosteroid Content and Balance in Potato Microclones Is Determined by Organ Specificity and the Variety Ripening Term. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2019; 485:33-36. [PMID: 31197590 DOI: 10.1134/s0012496619020017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 10/15/2018] [Accepted: 10/15/2018] [Indexed: 11/23/2022]
Abstract
The brassinosteroid (BS) profiles in shoots and roots of the potato plants were shown to be organ-specific and dependent on the term of variety ripening. The amount of all studied groups of steroid phytohormones proved to be an order of magnitude higher in roots than in shoots. In roots, the brassinosteroid lactones predominated, while in shoots, their biogenetic precursors, 6-ketones, were prevailing. The early-ripening variety Zhukovsky Early is characterized by a high content of almost all BS groups (first of all, brassinolide group) and a relatively high content of B-lactones in shoots. With aging, the content of B-lactones in plants decreases, while that of B-ketones grows up.
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Affiliation(s)
- M V Efimova
- National Research Tomsk State University, 634050, Tomsk, Russia.
| | - R P Litvinovskaya
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, 220141, Minsk, Belarus
| | - Yu V Medvedeva
- National Research Tomsk State University, 634050, Tomsk, Russia
| | - O K Murgan
- National Research Tomsk State University, 634050, Tomsk, Russia
| | - A L Sauchuk
- National Research Tomsk State University, 634050, Tomsk, Russia
| | - V V Kuznetsov
- National Research Tomsk State University, 634050, Tomsk, Russia.,Timiryazev Institute of Plant Physiology, Russian Academy of Science, 127276, Moscow, Russia
| | - V A Khripach
- National Research Tomsk State University, 634050, Tomsk, Russia.,Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, 220141, Minsk, Belarus
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26
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Cui J, Jiang N, Meng J, Yang G, Liu W, Zhou X, Ma N, Hou X, Luan Y. LncRNA33732-respiratory burst oxidase module associated with WRKY1 in tomato- Phytophthora infestans interactions. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 97:933-946. [PMID: 30472748 DOI: 10.1111/tpj.14173] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 11/10/2018] [Accepted: 11/15/2018] [Indexed: 05/09/2023]
Abstract
Our previous studies indicated that tomato WRKY1 transcription factor acts as a positive regulator during tomato resistance to Phytophthora infestans. However, the molecular mechanism of WRKY1-mediated resistance regulation remains unclear. Here, we used a comparative transcriptome analysis between wild-type and WRKY1-overexpressing tomato plants to identify differentially expressed genes (DEGs) and long non-coding RNAs (DELs), and we examined long non-coding RNA (lncRNA)-gene networks. The promoter sequences of the upregulated DEGs and DELs were analyzed. Among 1073 DEGs and 199 DELs, 1 kb 5'-upstream regions of 59 DEGs and 22 DELs contain the W-box, the target sequence of the WRKY1. The results of promoter-β-glucuronidase (GUS) fusion and yeast one-hybrid assay showed that lncRNA33732 was activated by WRKY1 through sequence-specific interactions with the W-box element in its promoter. The overexpression and silencing analysis of lncRNA33732 in tomato showed that lncRNA33732 acts as a positive regulator and enhanced tomato resistance to P. infestans by induction of the expression of respiratory burst oxidase (RBOH) and increase in the accumulation of H2 O2 . When the expression of RBOH gene was inhibited in tomato plants, H2 O2 accumulation decreased and resistance were impaired. These findings suggest that lncRNA33732 activated by WRKY1 induces RBOH expression to increase H2 O2 accumulation in early defense reaction of tomato to P. infestans attack. Our results provide insights into the WRKY1-lncRNA33732-RBOH module involved in the regulation of H2 O2 accumulation and resistance to P. infestans, as well as provide candidates to enhance broad-spectrum resistance to pathogens in tomato.
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Affiliation(s)
- Jun Cui
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, 116024, China
| | - Ning Jiang
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, 116024, China
| | - Jun Meng
- School of Computer Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Guanglei Yang
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, 116024, China
| | - Weiwei Liu
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, 116024, China
| | - Xiaoxu Zhou
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, 116024, China
| | - Ning Ma
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, 116024, China
| | - Xinxin Hou
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, 116024, China
| | - Yushi Luan
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, 116024, China
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27
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Xu X, Fang P, Zhang H, Chi C, Song L, Xia X, Shi K, Zhou Y, Zhou J, Yu J. Strigolactones positively regulate defense against root-knot nematodes in tomato. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:1325-1337. [PMID: 30576511 PMCID: PMC6382333 DOI: 10.1093/jxb/ery439] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 11/30/2018] [Indexed: 05/20/2023]
Abstract
Strigolactones (SLs) are carotenoid-derived phytohormones that are known to influence various aspects of plant growth and development. As root-derived signals, SLs can enhance symbiosis between plants and arbuscular mycorrhizal fungi (AMF). However, little is known about the roles of SLs in plant defense against soil-borne pathogens. Here, we determined that infection with root-knot nematodes (RKNs; Meloidogyne incognita) induced SL biosynthesis in roots of tomato (Solanum lycopersicum). Silencing of SL biosynthesis genes compromised plant defense against RKNs, whilst application of the SL analog racGR24 enhanced it. Accumulation of endogenous jasmonic acid (JA) and abscisic acid (ABA) in the roots in response to RKN infection was enhanced by silencing of SL biosynthetic genes and was suppressed by application of racGR24. Genetic evidence showed that JA was a positive regulator of defense against RKNs while ABA was a negative regulator. In addition, racGR24 enhanced the defense against nematode in a JA-deficient mutant but not in an ABA-deficient mutant. Silencing of SL biosynthetic genes resulted in up-regulation of MYC2, which negatively regulated defense against RKNs. Our results demonstrate that SLs play a positive role in nematode defense in tomato and that MYC2 negatively regulates this defense, potentially by mediating hormone crosstalk among SLs, ABA and JA.
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Affiliation(s)
- Xuechen Xu
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Pingping Fang
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Hui Zhang
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Cheng Chi
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Liuxia Song
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Xiaojian Xia
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Kai Shi
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Yanhong Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Jie Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Jingquan Yu
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Hangzhou, P.R. China
- Correspondence:
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28
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Sun LR, Zhao ZJ, Hao FS. NADPH oxidases, essential players of hormone signalings in plant development and response to stresses. PLANT SIGNALING & BEHAVIOR 2019; 14:1657343. [PMID: 31431139 PMCID: PMC6804714 DOI: 10.1080/15592324.2019.1657343] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Plasma membrane NADPH oxidases (NOXs), also named respiratory burst oxidase homologues (Rbohs), are critical generators of reactive oxygen species (ROS), which as signal molecules regulate growth and development, and adaptation to various biotic and abiotic stresses in plants. NOXs-dependent ROS production is frequently induced by diverse phytohormones. The ROS commonly function downstream of, and interplay with hormone signalings, coordinately modulating plant development and stress tolerance. In this review, we summarize recent advances on the roles and molecular mechanisms of Rbohs in mediating signalings of multiple hormones including auxin, gibberellins, abscisic acid, ethylene and brassinosteroids in plants.
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Affiliation(s)
- Li Rong Sun
- State Key Laboratory of Cotton Biology, Henan Key Laboratory of Plant Stress Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Zhi Jie Zhao
- State Key Laboratory of Cotton Biology, Henan Key Laboratory of Plant Stress Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Fu Shun Hao
- State Key Laboratory of Cotton Biology, Henan Key Laboratory of Plant Stress Biology, School of Life Sciences, Henan University, Kaifeng, China
- CONTACT Fu Shun Hao State Key Laboratory of Cotton Biology, Henan Key Laboratory of Plant Stress Biology, School of Life Sciences, Henan University, Kaifeng 475004, China
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29
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Zhu XF, Liu Y, Gai XT, Zhou Y, Xia ZY, Chen LJ, Duan YX, Xuan YH. SNARE proteins SYP22 and VAMP727 negatively regulate plant defense. PLANT SIGNALING & BEHAVIOR 2019; 14:1610300. [PMID: 31025584 PMCID: PMC6619965 DOI: 10.1080/15592324.2019.1610300] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Soluble N-ethylmaleimide sensitive factor attachment protein receptors (SNAREs) are the key regulators control trafficking of cargo proteins to their final destinations and plays key role in plant development; however, their roles in plant defense remain largely unknown. R-SNARE VAMP727 and Qa-SNARE SYP22 were previously reported to associate with vacuolar protein deposition and brassinosteroids (BRs) receptor BRI1 plasma membrane targeting. Here, we identified that VAMP727 and SYP22 are induced by infection of root-knot nematode (RKN), a plant pathogen, which cause severe growth defect and yield loss. Furthermore, decreased root-knot nematode (RKN) invasion, growth and disease index were observed in bri1-5 and SYP22ND, a SYP22 negative dominant mutants when compared to control plants. Overall, our results suggest that VAMP727-SYP22 SNARE complexes regulate plant defense might be via control of abundances of BRI1 on the plasma membrane.
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Affiliation(s)
- Xiao Feng Zhu
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Yang Liu
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Xiao Tong Gai
- Agronomy Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Yuan Zhou
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Zhen Yuan Xia
- Agronomy Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Li Jie Chen
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Yu Xi Duan
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Yuan Hu Xuan
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
- CONTACT Yuan Hu Xuan, College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
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30
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Černý M, Habánová H, Berka M, Luklová M, Brzobohatý B. Hydrogen Peroxide: Its Role in Plant Biology and Crosstalk with Signalling Networks. Int J Mol Sci 2018; 19:E2812. [PMID: 30231521 PMCID: PMC6163176 DOI: 10.3390/ijms19092812] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 09/13/2018] [Accepted: 09/15/2018] [Indexed: 12/30/2022] Open
Abstract
Hydrogen peroxide (H₂O₂) is steadily gaining more attention in the field of molecular biology research. It is a major REDOX (reduction⁻oxidation reaction) metabolite and at high concentrations induces oxidative damage to biomolecules, which can culminate in cell death. However, at concentrations in the low nanomolar range, H₂O₂ acts as a signalling molecule and in many aspects, resembles phytohormones. Though its signalling network in plants is much less well characterized than are those of its counterparts in yeast or mammals, accumulating evidence indicates that the role of H₂O₂-mediated signalling in plant cells is possibly even more indispensable. In this review, we summarize hydrogen peroxide metabolism in plants, the sources and sinks of this compound and its transport via peroxiporins. We outline H₂O₂ perception, its direct and indirect effects and known targets in the transcriptional machinery. We focus on the role of H₂O₂ in plant growth and development and discuss the crosstalk between it and phytohormones. In addition to a literature review, we performed a meta-analysis of available transcriptomics data which provided further evidence for crosstalk between H₂O₂ and light, nutrient signalling, temperature stress, drought stress and hormonal pathways.
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Affiliation(s)
- Martin Černý
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences Mendel University in Brno, 613 00 Brno, Czech Republic.
- Phytophthora Research Centre, Faculty of AgriSciences, Mendel University in Brno, 613 00 Brno, Czech Republic.
| | - Hana Habánová
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences Mendel University in Brno, 613 00 Brno, Czech Republic.
- CEITEC-Central European Institute of Technology, Faculty of AgriSciences Mendel University in Brno, 613 00 Brno, Czech Republic.
- Brno Ph.D. Talent, South Moravian Centre for International Mobility, 602 00 Brno, Czech Republic.
| | - Miroslav Berka
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences Mendel University in Brno, 613 00 Brno, Czech Republic.
| | - Markéta Luklová
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences Mendel University in Brno, 613 00 Brno, Czech Republic.
- CEITEC-Central European Institute of Technology, Faculty of AgriSciences Mendel University in Brno, 613 00 Brno, Czech Republic.
| | - Břetislav Brzobohatý
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences Mendel University in Brno, 613 00 Brno, Czech Republic.
- CEITEC-Central European Institute of Technology, Faculty of AgriSciences Mendel University in Brno, 613 00 Brno, Czech Republic.
- Institute of Biophysics AS CR, 613 00 Brno, Czech Republic.
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Locato V, Cimini S, De Gara L. ROS and redox balance as multifaceted players of cross-tolerance: epigenetic and retrograde control of gene expression. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:3373-3391. [PMID: 29722828 DOI: 10.1093/jxb/ery168] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 04/27/2018] [Indexed: 05/07/2023]
Abstract
Retrograde pathways occurring between chloroplasts, mitochondria, and the nucleus involve oxidative and antioxidative signals that, working in a synergistic or antagonistic mode, control the expression of specific patterns of genes following stress perception. Increasing evidence also underlines the relevance of mitochondrion-chloroplast-nucleus crosstalk in modulating the whole cellular redox metabolism by a controlled and integrated flux of information. Plants can maintain the acquired tolerance by a stress memory, also operating at the transgenerational level, via epigenetic and miRNA-based mechanisms controlling gene expression. Data discussed in this review strengthen the idea that ROS, redox signals, and shifts in cellular redox balance permeate the signalling network leading to cross-tolerance. The identification of specific ROS/antioxidative signatures leading a plant to different fates under stress is pivotal for identifying strategies to monitor and increase plant fitness in a changing environment. This review provides an update of the plant redox signalling network implicated in stress responses, in particular in cross-tolerance acquisition. The interplay between reactive oxygen species (ROS), ROS-derived signals, and antioxidative pathways is also discussed in terms of plant acclimation to stress in the short and long term.
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Affiliation(s)
- Vittoria Locato
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
| | - Sara Cimini
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
| | - Laura De Gara
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
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Dhankher OP, Foyer CH. Climate resilient crops for improving global food security and safety. PLANT, CELL & ENVIRONMENT 2018; 41:877-884. [PMID: 29663504 DOI: 10.1111/pce.13207] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Food security and the protection of the environment are urgent issues for global society, particularly with the uncertainties of climate change. Changing climate is predicted to have a wide range of negative impacts on plant physiology metabolism, soil fertility and carbon sequestration, microbial activity and diversity that will limit plant growth and productivity, and ultimately food production. Ensuring global food security and food safety will require an intensive research effort across the food chain, starting with crop production and the nutritional quality of the food products. Much uncertainty remains concerning the resilience of plants, soils, and associated microbes to climate change. Intensive efforts are currently underway to improve crop yields with lower input requirements and enhance the sustainability of yield through improved biotic and abiotic stress tolerance traits. In addition, significant efforts are focused on gaining a better understanding of the root/soil interface and associated microbiomes, as well as enhancing soil properties.
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Affiliation(s)
- Om Parkash Dhankher
- Stockbridge School of Agriculture, University of Massachusetts Amherst MA, Amherst, MA, 01003, USA
| | - Christine H Foyer
- Centre for Plant Sciences, School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
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33
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Jagodzik P, Tajdel-Zielinska M, Ciesla A, Marczak M, Ludwikow A. Mitogen-Activated Protein Kinase Cascades in Plant Hormone Signaling. FRONTIERS IN PLANT SCIENCE 2018; 9:1387. [PMID: 30349547 PMCID: PMC6187979 DOI: 10.3389/fpls.2018.01387] [Citation(s) in RCA: 168] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 08/31/2018] [Indexed: 05/02/2023]
Abstract
Mitogen-activated protein kinase (MAPK) modules play key roles in the transduction of environmental and developmental signals through phosphorylation of downstream signaling targets, including other kinases, enzymes, cytoskeletal proteins or transcription factors, in all eukaryotic cells. A typical MAPK cascade consists of at least three sequentially acting serine/threonine kinases, a MAP kinase kinase kinase (MAPKKK), a MAP kinase kinase (MAPKK) and finally, the MAP kinase (MAPK) itself, with each phosphorylating, and hence activating, the next kinase in the cascade. Recent advances in our understanding of hormone signaling pathways have led to the discovery of new regulatory systems. In particular, this research has revealed the emerging role of crosstalk between the protein components of various signaling pathways and the involvement of this crosstalk in multiple cellular processes. Here we provide an overview of current models and mechanisms of hormone signaling with a special emphasis on the role of MAPKs in cell signaling networks. One-sentence summary: In this review we highlight the mechanisms of crosstalk between MAPK cascades and plant hormone signaling pathways and summarize recent findings on MAPK regulation and function in various cellular processes.
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Affiliation(s)
- Przemysław Jagodzik
- Department of Plant Physiology, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Małgorzata Tajdel-Zielinska
- Department of Biotechnology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Agata Ciesla
- Department of Biotechnology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Małgorzata Marczak
- Department of Biotechnology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Agnieszka Ludwikow
- Department of Biotechnology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
- *Correspondence: Agnieszka Ludwikow,
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Yang YX, Wu C, Ahammed GJ, Wu C, Yang Z, Wan C, Chen J. Red Light-Induced Systemic Resistance Against Root-Knot Nematode Is Mediated by a Coordinated Regulation of Salicylic Acid, Jasmonic Acid and Redox Signaling in Watermelon. FRONTIERS IN PLANT SCIENCE 2018; 9:899. [PMID: 30042771 PMCID: PMC6048386 DOI: 10.3389/fpls.2018.00899] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 06/07/2018] [Indexed: 02/05/2023]
Abstract
Red light (RL) can stimulate plant defense against foliar diseases; however, its role in activation of systemic defense against root diseases remains unclear. Here, the effect of RL on root knot nematode Meloidogyne incognita (RKN) infestation was investigated in watermelon plants (Citrullus lanatus L.). Plants were exposed to 200 μmol m-2 s-1 photosynthetic photon flux density RL at the canopy level for 21 days using light-emitting photodiodes. The results showed that RL significantly suppressed gall formation and nematode development, which was closely associated with the RL-induced attenuation of oxidative stress in roots. Gene expression analysis showed that RL caused a transient upregulation of PR1 and WRKY70 transcripts at 7 days post inoculation in RKN-infected plants. Further investigation revealed that RL-induced systemic defense against RKN was attributed to increased jasmonic acid (JA) and salicylic acid (SA) content, and transcript levels of their biosynthetic genes in roots. Interestingly, while malondialdehyde content decreased, H2O2 accumulation increased in RL-treated RKN-plants, indicating a potential signaling role of H2O2 in mediating RL-induced systemic defense. Furthermore, analysis of enzymatic and non-enzymatic antidoxidants revealed that RL-induced enhanced defense agaist RKN was also attributed to increased activities of antioxidant enzymes as well as redox homeostasis. Taken together, these findings suggest that RL could enhance systemic resistance against RKN, which is mediated by a coordinated regulation of JA- and SA-dependent signaling, antioxidants, and redox homeostasis in watermelon plants.
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Affiliation(s)
- You-xin Yang
- Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, College of Agronomy, Jiangxi Agricultural University, Nanchang, China
| | - Chaoqun Wu
- Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, College of Agronomy, Jiangxi Agricultural University, Nanchang, China
| | - Golam J. Ahammed
- College of Forestry, Henan University of Science and Technology, Luoyang, China
| | - Caijun Wu
- Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, College of Agronomy, Jiangxi Agricultural University, Nanchang, China
| | - Zemao Yang
- Germplasm Lab, Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha, China
| | - Chunpeng Wan
- Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, College of Agronomy, Jiangxi Agricultural University, Nanchang, China
| | - Jinyin Chen
- Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, College of Agronomy, Jiangxi Agricultural University, Nanchang, China
- Pingxiang University, Pingxiang, China
- *Correspondence: Jinyin Chen,
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