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Hamsa S, Rajarammohan S, Aswal M, Kumar M, Kaur J. Transcriptome responses of Arabidopsis to necrotrophic fungus Alternaria brassicae reveal pathways and candidate genes associated with resistance. PLANT MOLECULAR BIOLOGY 2024; 114:68. [PMID: 38842571 DOI: 10.1007/s11103-024-01453-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: 11/17/2023] [Accepted: 04/11/2024] [Indexed: 06/07/2024]
Abstract
Alternaria leaf blight (ALB), caused by a necrotrophic fungus Alternaria brassicae is a serious disease of oleiferous Brassicas resulting in significant yield losses worldwide. No robust resistance against A. brassicae has been identified in the Brassicas. Natural accessions of Arabidopsis show a spectrum of responses to A. brassicae ranging from high susceptibility to complete resistance. To understand the molecular mechanisms of resistance/ susceptibility, we analysed the comparative changes in the transcriptome profile of Arabidopsis accessions with contrasting responses- at different time points post-infection. Differential gene expression, GO enrichment, pathway enrichment, and weighted gene co-expression network analysis (WGCNA) revealed reprogramming of phenylpropanoid biosynthetic pathway involving lignin, hydroxycinnamic acids, scopoletin, anthocyanin genes to be highly associated with resistance against A. brassicae. T-DNA insertion mutants deficient in the biosynthesis of coumarin scopoletin exhibited enhanced susceptibility to A. brassicae. The supplementation of scopoletin to medium or exogenous application resulted in a significant reduction in the A. brassicae growth. Our study provides new insights into the transcriptome dynamics in A. brassicae-challenged Arabidopsis and demonstrates the involvement of coumarins in plant immunity against the Brassica pathogen A. brassicae.
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Affiliation(s)
- S Hamsa
- Department of Genetics, University of Delhi, South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Sivasubramanian Rajarammohan
- Centre for Genetic Manipulation of Crop Plants, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
- Agricultural Biotechnology Division, National Agri-Food Biotechnology Institute, SAS Nagar, Mohali, Punjab, India
| | - Manisha Aswal
- Department of Biophysics, University of Delhi, South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Manish Kumar
- Department of Biophysics, University of Delhi, South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Jagreet Kaur
- Department of Genetics, University of Delhi, South Campus, Benito Juarez Road, New Delhi, 110021, India.
- Centre for Genetic Manipulation of Crop Plants, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India.
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Marrafon-Silva M, Maia T, Calderan-Rodrigues MJ, Strabello M, Oliveira L, Creste S, Melotto M, Monteiro-Vitorello CB. Exploring Potential Surrogate Systems for Studying the Early Steps of the Sporisorium scitamineum Pathogenesis. PHYTOPATHOLOGY 2024:PHYTO05230156R. [PMID: 38148162 DOI: 10.1094/phyto-05-23-0156-r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Despite its global importance as a primary source of table sugar and bioethanol, sugarcane faces a significant threat to its production due to diseases. One of these diseases, sugarcane smut, involves the emergence of a whip-like structure from the host apical shoot. The slow onset of this pathogenesis is the most substantial challenge for researchers to investigate the molecular events leading to resistance or susceptibility. In this study, we explored the early interaction between the smut fungus Sporisorium scitamineum and foliar tissues of the model plants Arabidopsis thaliana and Nicotiana benthamiana. Upon inoculation with the fungus, A. thaliana showed a compatible reaction, producing lesions during fungus colonization, whereas N. benthamiana showed signs of nonhost resistance. In addition, we propose a sugarcane detached leaf assay using plants cultivated in vitro to reveal sugarcane smut response outcomes. We used two sugarcane genotypes with known contrasting reactions to smut in the field. Although there is no evidence of sugarcane smut fungus infecting host leaves naturally, the sugarcane detached leaf assay enabled a rapid assessment of disease outcomes. Different symptoms in the detached leaves after inoculation distinguished smut-susceptible and smut-resistant sugarcane genotypes. Microscopic observations and gene expression analysis of S. scitamineum candidate effectors confirmed the fungal growth and its restriction on the compatible and incompatible interactions, respectively. These findings offer new prospects into the disease phenotyping of S. scitamineum, which could greatly expedite the comprehension of the initial stages of the pathogenesis and predict smut resistance in sugarcane genotypes.
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Affiliation(s)
- Mariana Marrafon-Silva
- Departamento de Genética, Universidade de São Paulo (USP), Escola Superior de Agricultura Luiz de Queiroz (ESALQ), Piracicaba, SP, Brazil
| | - Thiago Maia
- Departamento de Genética, Universidade de São Paulo (USP), Escola Superior de Agricultura Luiz de Queiroz (ESALQ), Piracicaba, SP, Brazil
- Departamento de Fitopatologia e Nematologia, USP, ESALQ, Piracicaba, SP, Brazil
| | - Maria Juliana Calderan-Rodrigues
- Departamento de Genética, Universidade de São Paulo (USP), Escola Superior de Agricultura Luiz de Queiroz (ESALQ), Piracicaba, SP, Brazil
| | - Mariana Strabello
- Departamento de Genética, Universidade de São Paulo (USP), Escola Superior de Agricultura Luiz de Queiroz (ESALQ), Piracicaba, SP, Brazil
| | - Lâina Oliveira
- Departamento de Genética, Universidade de São Paulo (USP), Escola Superior de Agricultura Luiz de Queiroz (ESALQ), Piracicaba, SP, Brazil
| | | | - Maeli Melotto
- Department of Plant Sciences, University of California, Davis, CA, U.S.A
| | - Claudia Barros Monteiro-Vitorello
- Departamento de Genética, Universidade de São Paulo (USP), Escola Superior de Agricultura Luiz de Queiroz (ESALQ), Piracicaba, SP, Brazil
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3
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Geng S, Gao W, Li S, Chen Q, Jiao Y, Zhao J, Wang Y, Wang T, Qu Y, Chen Q. Rapidly mining candidate cotton drought resistance genes based on key indicators of drought resistance. BMC PLANT BIOLOGY 2024; 24:129. [PMID: 38383284 PMCID: PMC10880307 DOI: 10.1186/s12870-024-04801-6] [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: 09/20/2023] [Accepted: 02/05/2024] [Indexed: 02/23/2024]
Abstract
BACKGROUND Focusing on key indicators of drought resistance is highly important for quickly mining candidate genes related to drought resistance in cotton. RESULTS In the present study, drought resistance was identified in drought resistance-related RIL populations during the flowering and boll stages, and multiple traits were evaluated; these traits included three key indicators: plant height (PH), single boll weight (SBW) and transpiration rate (Tr). Based on these three key indicators, three groups of extreme mixing pools were constructed for BSA-seq. Based on the mapping interval of each trait, a total of 6.27 Mb QTL intervals were selected on chromosomes A13 (3.2 Mb), A10 (2.45 Mb) and A07 (0.62 Mb) as the focus of this study. Based on the annotation information and qRT‒PCR analysis, three key genes that may be involved in the drought stress response of cotton were screened: GhF6'H1, Gh3AT1 and GhPER55. qRT‒PCR analysis of parental and extreme germplasm materials revealed that the expression of these genes changed significantly under drought stress. Cotton VIGS experiments verified the important impact of key genes on cotton drought resistance. CONCLUSIONS This study focused on the key indicators of drought resistance, laying the foundation for the rapid mining of drought-resistant candidate genes in cotton and providing genetic resources for directed molecular breeding of drought resistance in cotton.
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Affiliation(s)
- Shiwei Geng
- 1Engineering Research Centre of Cotton, Ministry of Education/College of Agriculture, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, 830052, China
| | - Wenju Gao
- 1Engineering Research Centre of Cotton, Ministry of Education/College of Agriculture, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, 830052, China
| | - Shengmei Li
- 1Engineering Research Centre of Cotton, Ministry of Education/College of Agriculture, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, 830052, China
| | - Qin Chen
- 1Engineering Research Centre of Cotton, Ministry of Education/College of Agriculture, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, 830052, China
| | - Yang Jiao
- 1Engineering Research Centre of Cotton, Ministry of Education/College of Agriculture, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, 830052, China
| | - Jieyin Zhao
- 1Engineering Research Centre of Cotton, Ministry of Education/College of Agriculture, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, 830052, China
| | - Yuxiang Wang
- 1Engineering Research Centre of Cotton, Ministry of Education/College of Agriculture, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, 830052, China
| | - TingWei Wang
- 1Engineering Research Centre of Cotton, Ministry of Education/College of Agriculture, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, 830052, China
| | - Yanying Qu
- 1Engineering Research Centre of Cotton, Ministry of Education/College of Agriculture, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, 830052, China
| | - Quanjia Chen
- 1Engineering Research Centre of Cotton, Ministry of Education/College of Agriculture, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, 830052, China.
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Rates ADB, Cesarino I. Pour some sugar on me: The diverse functions of phenylpropanoid glycosylation. JOURNAL OF PLANT PHYSIOLOGY 2023; 291:154138. [PMID: 38006622 DOI: 10.1016/j.jplph.2023.154138] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 11/06/2023] [Indexed: 11/27/2023]
Abstract
The phenylpropanoid metabolism is the source of a vast array of specialized metabolites that play diverse functions in plant growth and development and contribute to all aspects of plant interactions with their surrounding environment. These compounds protect plants from damaging ultraviolet radiation and reactive oxygen species, provide mechanical support for the plants to stand upright, and mediate plant-plant and plant-microorganism communications. The enormous metabolic diversity of phenylpropanoids is further expanded by chemical modifications known as "decorative reactions", including hydroxylation, methylation, glycosylation, and acylation. Among these modifications, glycosylation is the major driving force of phenylpropanoid structural diversification, also contributing to the expansion of their properties. Phenylpropanoid glycosylation is catalyzed by regioselective uridine diphosphate (UDP)-dependent glycosyltransferases (UGTs), whereas glycosyl hydrolases known as β-glucosidases are the major players in deglycosylation. In this article, we review how the glycosylation process affects key physicochemical properties of phenylpropanoids, such as molecular stability and solubility, as well as metabolite compartmentalization/storage and biological activity/toxicity. We also summarize the recent knowledge on the functional implications of glycosylation of different classes of phenylpropanoid compounds. A balance of glycosylation/deglycosylation might represent an essential molecular mechanism to regulate phenylpropanoid homeostasis, allowing plants to dynamically respond to diverse environmental signals.
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Affiliation(s)
- Arthur de Barros Rates
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, 05508-090, São Paulo, Brazil
| | - Igor Cesarino
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, 05508-090, São Paulo, Brazil; Synthetic and Systems Biology Center, InovaUSP, Avenida Professor Lucio Martins Rodrigues 370, 05508-020, São Paulo, Brazil.
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5
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Beesley A, Beyer SF, Wanders V, Levecque S, Bredenbruch S, Habash SS, Schleker ASS, Gätgens J, Oldiges M, Schultheiss H, Conrath U, Langenbach CJG. Engineered coumarin accumulation reduces mycotoxin-induced oxidative stress and disease susceptibility. PLANT BIOTECHNOLOGY JOURNAL 2023; 21:2490-2506. [PMID: 37578146 PMCID: PMC10651151 DOI: 10.1111/pbi.14144] [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: 09/20/2022] [Revised: 06/23/2023] [Accepted: 07/23/2023] [Indexed: 08/15/2023]
Abstract
Coumarins can fight pathogens and are thus promising for crop protection. Their biosynthesis, however, has not yet been engineered in crops. We tailored the constitutive accumulation of coumarins in transgenic Nicotiana benthamiana, Glycine max and Arabidopsis thaliana plants, as well as in Nicotiana tabacum BY-2 suspension cells. We did so by overexpressing A. thaliana feruloyl-CoA 6-hydroxylase 1 (AtF6'H1), encoding the key enzyme of scopoletin biosynthesis. Besides scopoletin and its glucoside scopolin, esculin at low level was the only other coumarin detected in transgenic cells. Mechanical damage of scopolin-accumulating tissue led to a swift release of scopoletin, presumably from the scopolin pool. High scopolin levels in A. thaliana roots coincided with reduced susceptibility to the root-parasitic nematode Heterodera schachtii. In addition, transgenic soybean plants were more tolerant to the soil-borne pathogenic fungus Fusarium virguliforme. Because mycotoxin-induced accumulation of reactive oxygen species and cell death were reduced in the AtF6'H1-overexpressors, the weaker sensitivity to F. virguliforme may be caused by attenuated oxidative damage of coumarin-hyperaccumulating cells. Together, engineered coumarin accumulation is promising for enhanced disease resilience of crops.
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Affiliation(s)
| | - Sebastian F. Beyer
- Department of Plant PhysiologyRWTH Aachen UniversityAachenGermany
- Present address:
BASF SE, Agricultural CenterLimburgerhofGermany
| | - Verena Wanders
- Department of Plant PhysiologyRWTH Aachen UniversityAachenGermany
| | - Sophie Levecque
- Department of Plant PhysiologyRWTH Aachen UniversityAachenGermany
| | | | - Samer S. Habash
- Department of Molecular PhytomedicineUniversity of BonnBonnGermany
- Present address:
BASF Vegetable SeedsNunhemNetherlands
| | | | - Jochem Gätgens
- Department of Bioprocesses and BioanalyticsResearch Center Jülich GmbHJülichGermany
| | - Marco Oldiges
- Department of Bioprocesses and BioanalyticsResearch Center Jülich GmbHJülichGermany
| | | | - Uwe Conrath
- Department of Plant PhysiologyRWTH Aachen UniversityAachenGermany
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Yin Q, Wu T, Gao R, Wu L, Shi Y, Wang X, Wang M, Xu Z, Zhao Y, Su X, Su Y, Han X, Yuan L, Xiang L, Chen S. Multi-omics reveal key enzymes involved in the formation of phenylpropanoid glucosides in Artemisia annua. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 201:107795. [PMID: 37301186 DOI: 10.1016/j.plaphy.2023.107795] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/15/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023]
Abstract
Although mainly known for producing artemisinin, Artemisia annua is enriched in phenylpropanoid glucosides (PGs) with significant bioactivities. However, the biosynthesis of A. annua PGs is insufficiently investigated. Different A. annua ecotypes from distinct growing environments accumulate varying amounts of metabolites, including artemisinin and PGs such as scopolin. UDP-glucose:phenylpropanoid glucosyltransferases (UGTs) transfers glucose from UDP-glucose in PG biosynthesis. Here, we found that the low-artemisinin ecotype GS produces a higher amount of scopolin, compared to the high-artemisinin ecotype HN. By combining transcriptome and proteome analyses, we selected 28 candidate AaUGTs from 177 annotated AaUGTs. Using AlphaFold structural prediction and molecular docking, we determined the binding affinities of 16 AaUGTs. Seven of the AaUGTs enzymatically glycosylated phenylpropanoids. AaUGT25 converted scopoletin to scopolin and esculetin to esculin. The lack of accumulation of esculin in the leaf and the high catalytic efficiency of AaUGT25 on esculetin suggest that esculetin is methylated to scopoletin, the precursor of scopolin. We also discovered that AaOMT1, a previously uncharacterized O-methyltransferase, converts esculetin to scopoletin, suggesting an alternative route for producing scopoletin, which contributes to the high-level accumulation of scopolin in A. annua leaves. AaUGT1 and AaUGT25 responded to induction of stress-related phytohormones, implying the involvement of PGs in stress responses.
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Affiliation(s)
- Qinggang Yin
- Artemisinin Research Center, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China; Key Laboratory of Beijing for Identification and Safety Evaluation of Chinese Medicine, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Tianze Wu
- School of Chemistry Chemical Engineering and Life Sciences, Wuhan University of Technology, No. 122, Lo Lion Road, Wuhan, Hubei, 430070, China
| | - Ranran Gao
- Artemisinin Research Center, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Lan Wu
- Artemisinin Research Center, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Yuhua Shi
- Artemisinin Research Center, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Xingwen Wang
- Artemisinin Research Center, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Mengyue Wang
- Artemisinin Research Center, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Zhichao Xu
- Ministry of Education, Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Harbin, 150006, China
| | - Yueliang Zhao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, 201306, China
| | - Xiaojia Su
- College of Life Science and Technology, Henan Institute of Science and Technology, Xinxiang, 453000, China
| | - Yanyan Su
- Amway(China) Botanical R&D Center, Wuxi, 214115, China
| | - Xiaoyan Han
- China National Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Ling Yuan
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY, 40546, USA; Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, KY, 40546-0236, USA
| | - Li Xiang
- Artemisinin Research Center, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Shilin Chen
- Artemisinin Research Center, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China; Key Laboratory of Beijing for Identification and Safety Evaluation of Chinese Medicine, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
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7
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Sun G, Liao J, Kurze E, Hoffmann TD, Steinchen W, McGraphery K, Habegger R, Marek L, Catici DAM, Ludwig C, Jing T, Hoffmann T, Song C, Schwab W. Apocarotenoids are allosteric effectors of a dimeric plant glycosyltransferase involved in defense and lignin formation. THE NEW PHYTOLOGIST 2023; 238:2080-2098. [PMID: 36908092 DOI: 10.1111/nph.18875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 03/02/2023] [Indexed: 05/04/2023]
Abstract
Glycosyltransferases are nature's versatile tools to tailor the functionalities of proteins, carbohydrates, lipids, and small molecules by transferring sugars. Prominent substrates are hydroxycoumarins such as scopoletin, which serve as natural plant protection agents. Similarly, C13-apocarotenoids, which are oxidative degradation products of carotenoids/xanthophylls, protect plants by repelling pests and attracting pest predators. We show that C13-apocarotenoids interact with the plant glycosyltransferase NbUGT72AY1 and induce conformational changes in the enzyme catalytic center ultimately reducing its inherent UDP-α-d-glucose glucohydrolase activity and increasing its catalytic activity for productive hydroxycoumarin substrates. By contrast, C13-apocarotenoids show no effect on the catalytic activity toward monolignol lignin precursors, which are competitive substrates. In vivo studies in tobacco plants (Nicotiana benthamiana) confirmed increased glycosylation activity upon apocarotenoid supplementation. Thus, hydroxycoumarins and apocarotenoids represent specialized damage-associated molecular patterns, as they each provide precise information about the plant compartments damaged by pathogen attack. The molecular basis for the C13-apocarotenoid-mediated interplay of two plant protective mechanisms and their function as allosteric enhancers opens up potential applications of the natural products in agriculture and pharmaceutical industry.
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Affiliation(s)
- Guangxin Sun
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Jieren Liao
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Elisabeth Kurze
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Timothy D Hoffmann
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Wieland Steinchen
- Center for Synthetic Microbiology (SYNMIKRO) & Faculty of Chemistry, Philipps-University Marburg, Karl-von-Frisch-Straße 14, 35043, Marburg, Germany
| | - Kate McGraphery
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Ruth Habegger
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Ludwig Marek
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Dragana A M Catici
- Center for Protein Assemblies (CPA), Technical University of Munich, Ernst-Otto-Fischer-Str. 8, 85748, Garching, Germany
| | - Christina Ludwig
- Bavarian Center for Biomolecular Mass Spectrometry (BayBioMS), School of Life Sciences Weihenstephan, Technische Universität München, Gregor-Mendel-Str. 4, 85354, Freising, Germany
| | - Tingting Jing
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Thomas Hoffmann
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Wilfried Schwab
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
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8
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Wang Y, Yang L, Zhou X, Wang Y, Liang Y, Luo B, Dai Y, Wei Z, Li S, He R, Ding W. Molecular mechanism of plant elicitor daphnetin-carboxymethyl chitosan nanoparticles against Ralstonia solanacearum by activating plant system resistance. Int J Biol Macromol 2023; 241:124580. [PMID: 37100321 DOI: 10.1016/j.ijbiomac.2023.124580] [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: 12/02/2022] [Revised: 02/23/2023] [Accepted: 04/20/2023] [Indexed: 04/28/2023]
Abstract
The exploration of biopolymer-based materials to avoid hazardous chemicals in agriculture has gained enormous importance for sustainable crop protection. Due to its good biocompatibility and water solubility, carboxymethyl chitosan (CMCS) has been widely applied as a pesticide carrier biomaterial. However, the mechanism by which carboxymethyl chitosan-grafted natural product nanoparticles induce tobacco systemic resistance against bacterial wilt remains largely unknown. In this study, water-soluble CMCS-grafted daphnetin (DA) nanoparticles (DA@CMCS-NPs) were successfully synthesized, characterized, and assessed for the first time. The grafting rate of DA in CMCS was 10.05 %, and the water solubility was increased. In addition, DA@CMCS-NPs significantly increased the activities of CAT, PPO and SOD defense enzymes, activated the expression of PR1 and NPR1, and suppressed the expression of JAZ3. DA@CMCS-NPs could induce immune responses against R. solanacearum in tobacco, including increases in defense enzymes and overexpression of pathogenesis-related (PR) proteins. The application of DA@CMCS-NPs effectively suppressed the development of tobacco bacterial wilt in pot experiments, and the control efficiency was as high as 74.23 %, 67.80 %, 61.67 % at 8, 10, and 12 days after inoculation. Additionally, DA@CMCS-NPs has excellent biosafety. Therefore, this study highlighted the application of DA@CMCS-NPs in manipulating tobacco to generate defense responses against R. solanacearum, which can be attributed to systemic resistance.
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Affiliation(s)
- Yao Wang
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Liang Yang
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Xiao Zhou
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Ye Wang
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Yijia Liang
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Binshao Luo
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Yuhao Dai
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Zhouling Wei
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Shili Li
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Rong He
- Chongqing Tobacco Industry Co., Ltd., Chongqing 400060, China.
| | - Wei Ding
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China.
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9
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Lebot V, Lawac F, Muñoz-Cuervo I, Mercier PE, Legendre L. Metabolite fingerprinting of cassava (Manihot esculenta Crantz) landraces assessed for post-harvest physiological deterioration (PPD). Food Chem 2023; 421:136217. [PMID: 37121018 DOI: 10.1016/j.foodchem.2023.136217] [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: 11/09/2022] [Revised: 04/14/2023] [Accepted: 04/17/2023] [Indexed: 05/02/2023]
Abstract
Cassava landraces are impacted by post-harvest physiological deterioration (PPD). 34 primary/secondary metabolites (carotenes, flavonols, indols, phenolic, hydroxycinnamic, and organic acids) were analysed using HPLC/GC-MS in 72 landraces harvested 8 months after planting (MAP) to clarify whether these compounds may play a role in PPD tolerance. Cluster analysis differentiated a first group with high organic acids contents, citric acid being dominant, a second group with landraces high in tryptophan, a third group including landraces with high phenolic and hydroxycinnamic acids content, and a fourth group characterised by 8 carotenoids. PPD tolerant and susceptible landraces were present in each group. To determine if PPD is related to age of harvest, 174 landraces were harvested at 6, 8, 10 and 12 MAP. Scopoletin, sucrose and glucose were analysed. PPD was positively correlated with DMC and negatively correlated with scopoletin at all ages of harvest. Scopoletin is a useful biomarker to characterize landraces.
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Affiliation(s)
- Vincent Lebot
- CIRAD-VARTC, P.O. Box 946, Port-Vila, Vanuatu; UMR AGAP Institut, Université de Montpellier, CIRAD, INRAE, Institut Agro, F-34398 Montpellier, France.
| | | | - Ismaël Muñoz-Cuervo
- Université Claude Bernard Lyon 1, Laboratoire d'Écologie Microbienne, Équipe 3 - Rhizosphère, CESN (Centre d'Étude des Substances Naturelles), France; UMR UCBL CNRS 5557 - INRA 1418. 16 rue Raphaël Dubois. F-69100 Villeurbanne Cedex, France
| | - Pierre-Edouard Mercier
- Université Claude Bernard Lyon 1, Laboratoire d'Écologie Microbienne, Équipe 3 - Rhizosphère, CESN (Centre d'Étude des Substances Naturelles), France; UMR UCBL CNRS 5557 - INRA 1418. 16 rue Raphaël Dubois. F-69100 Villeurbanne Cedex, France.
| | - Laurent Legendre
- Université Claude Bernard Lyon 1, Laboratoire d'Écologie Microbienne, Équipe 3 - Rhizosphère, CESN (Centre d'Étude des Substances Naturelles), France; UMR UCBL CNRS 5557 - INRA 1418. 16 rue Raphaël Dubois. F-69100 Villeurbanne Cedex, France.
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10
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Identification of a Novel Coumarins Biosynthetic Pathway in the Endophytic Fungus Fusarium oxysporum GU-7 with Antioxidant Activity. Appl Environ Microbiol 2023; 89:e0160122. [PMID: 36598487 PMCID: PMC9888266 DOI: 10.1128/aem.01601-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Coumarins are generally considered to be produced by natural plants. Fungi have been reported to produce coumarins, but their biosynthetic pathways are still unknown. In this study, Fusarium oxysporum GU-7 and GU-60 were isolated from Glycyrrhiza uralensis, and their antioxidant activities were determined to be significantly different. Abundant dipeptide, phenolic acids, and the plant-derived coumarins fraxetin and scopoletin were identified in GU-7 by untargeted metabolomics, and these compounds may account for its stronger antioxidant activity compared to GU-60. Combined with metabolome and RNA sequencing analysis, we identified 24 potentially key genes involved in coumarin biosynthesis and 6 intermediate metabolites. Interestingly, the best hit of S8H, a key gene involved in hydroxylation at the C-8 position of scopoletin to yield fraxetin, belongs to a plant species. Additionally, nondestructive infection of G. uralensis seeds with GU-7 significantly improved the antioxidant activity of seedlings compared to the control group. This antioxidant activity may depend on the biological characteristics of endophytes themselves, as we observed a positive correlation between the antioxidant activity of endophytic fungi and that of their nondestructively infected seedlings. IMPORTANCE Plant-produced coumarins have been shown to play an important role in assembly of the plant microbiomes and iron acquisition. Coumarins can also be produced by some microorganisms. However, studies on coumarin biosynthesis in microorganisms are still lacking. We report for the first time that fraxetin and scopoletin were simultaneously produced by F. oxysporum GU-7 with strong free radical scavenging abilities. Subsequently, we identified intermediate metabolites and key genes in the biosynthesis of these two coumarins. This is the first report on the coumarin biosynthesis pathway in nonplant species, providing new strategies and perspectives for coumarin production and expanding research on new ways for plants to obtain iron.
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11
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Peng R, Sun S, Li N, Kong L, Chen Z, Wang P, Xu L, Wang H, Geng X. Physiological and transcriptome profiling revealed defense networks during Cladosporium fulvum and tomato interaction at the early stage. FRONTIERS IN PLANT SCIENCE 2022; 13:1085395. [PMID: 36561446 PMCID: PMC9763619 DOI: 10.3389/fpls.2022.1085395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
Tomato leaf mold caused by Cladosporium fulvum (C. fulvum) is a serious fungal disease which results in huge yield losses in tomato cultivation worldwide. In our study, we discovered that ROS (reactive oxygen species) burst was triggered by C. fulvum treatment in tomato leaves. RNA-sequencing was used to identify differentially expressed genes (DEGs) induced by C. fulvum inoculation at the early stage of invasion in susceptible tomato plants. Gene ontology (GO) terms and Kyoto Encyclopedia of Genes and Genomes (KEGG) databases were used to annotate functions of DEGs in tomato plants. Based on our comparative analysis, DEGs related to plant-pathogen interaction pathway, plant hormone signal transduction pathway and the plant phenylpropanoid pathway were further analyzed. Our results discovered that a number of core defense genes against fungal invasion were induced and plant hormone signal transduction pathways were impacted by C. fulvum inoculation. Further, our results showed that SA (salicylic acid) and ABA (abscisic acid) contents were accumulated while JA (jasmonic acid) content decreased after C. fulvum inoculation in comparison with control, and quantitative real-time PCR to detect the relative expression of genes involved in SA, ABA and JA signaling pathway further confirmed our results. Together, results will contribute to understanding the mechanisms of C. fulvum and tomato interaction in future.
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Affiliation(s)
- Rong Peng
- College of Horticulture, Shanxi Agricultural University, Jinzhong, Shanxi, China
| | - Sheng Sun
- College of Horticulture, Shanxi Agricultural University, Jinzhong, Shanxi, China
| | - Na Li
- College of Horticulture, Shanxi Agricultural University, Jinzhong, Shanxi, China
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Lingjuan Kong
- Vegetable Department, Shanghai Agricultural Technology Extension and Service Center, Shanghai, China
| | - Zhifeng Chen
- College of Biology and Agricultural Technology, Zunyi Normal University, Zunyi, China
| | - Peng Wang
- College of Horticulture, Shanxi Agricultural University, Jinzhong, Shanxi, China
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Lurong Xu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Hehe Wang
- Clemson University, Edisto Research and Education Center, Blackville, SC, United States
| | - Xueqing Geng
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
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12
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Kushalappa AC, Hegde NG, Yogendra KN. Metabolic pathway genes for editing to enhance multiple disease resistance in plants. JOURNAL OF PLANT RESEARCH 2022; 135:705-722. [PMID: 36036859 DOI: 10.1007/s10265-022-01409-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 08/22/2022] [Indexed: 06/15/2023]
Abstract
Diseases are one of the major constraints in commercial crop production. Genetic diversity in varieties is the best option to manage diseases. Molecular marker-assisted breeding has produced hundreds of varieties with good yields, but the resistance level is not satisfactory. With the advent of whole genome sequencing, genome editing is emerging as an excellent option to improve the inadequate traits in these varieties. Plants produce thousands of antimicrobial secondary metabolites, which as polymers and conjugates are deposited to reinforce the secondary cell walls to contain the pathogen to an initial infection area. The resistance metabolites or the structures produced from them by plants are either constitutive (CR) or induced (IR), following pathogen invasion. The production of each resistance metabolite is controlled by a network of biosynthetic R genes, which are regulated by a hierarchy of R genes. A commercial variety also has most of these R genes, as in resistant, but a few may be mutated (SNPs/InDels). A few mutated genes, in one or more metabolic pathways, depending on the host-pathogen interaction, can be edited, and stacked to increase resistance metabolites or structures produced by them, to achieve required levels of multiple pathogen resistance under field conditions.
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Affiliation(s)
- Ajjamada C Kushalappa
- Plant Science Department, McGill University, Ste.-Anne-de-Bellevue, QC, H9X 3V9, Canada.
| | - Niranjan G Hegde
- Plant Science Department, McGill University, Ste.-Anne-de-Bellevue, QC, H9X 3V9, Canada
| | - Kalenahalli N Yogendra
- International Crops Research Institute for the Semi-Arid Tropics, Hyderabad, Telangana, India
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13
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Nguyen NH, Trotel-Aziz P, Villaume S, Rabenoelina F, Clément C, Baillieul F, Aziz A. Priming of camalexin accumulation in induced systemic resistance by beneficial bacteria against Botrytis cinerea and Pseudomonas syringae pv. tomato DC3000. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:3743-3757. [PMID: 35191984 DOI: 10.1093/jxb/erac070] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 02/18/2022] [Indexed: 06/14/2023]
Abstract
Plants harbor various beneficial microbes that modulate their innate immunity, resulting in induced systemic resistance (ISR) against a broad range of pathogens. Camalexin is an integral part of Arabidopsis innate immunity, but the contribution of its biosynthesis in ISR is poorly investigated. We focused on camalexin accumulation primed by two beneficial bacteria, Pseudomonas fluorescens and Bacillus subtilis, and its role in ISR against Botrytis cinerea and Pseudomonas syringae Pst DC3000. Our data show that colonization of Arabidopsis thaliana roots by beneficial bacteria triggers ISR against both pathogens and primes plants for enhanced accumulation of camalexin and CYP71A12 transcript in leaf tissues. Pseudomonas fluorescens induced the most efficient ISR response against B. cinerea, while B. subtilis was more efficient against Pst DC3000. Analysis of cyp71a12 and pad3 mutants revealed that loss of camalexin synthesis affected ISR mediated by both bacteria against B. cinerea. CYP71A12 and PAD3 contributed significantly to the pathogen-triggered accumulation of camalexin, but PAD3 does not seem to contribute to ISR against Pst DC3000. This indicated a significant contribution of camalexin in ISR against B. cinerea, but not always against Pst DC3000. Experiments with Arabidopsis mutants compromised in different hormonal signaling pathways highlighted that B. subtilis stimulates similar signaling pathways upon infection with both pathogens, since salicylic acid (SA), but not jasmonic acid (JA) or ethylene, is required for ISR camalexin accumulation. However, P. fluorescens-induced ISR differs depending on the pathogen; both SA and JA are required for camalexin accumulation upon B. cinerea infection, while camalexin is not necessary for priming against Pst DC3000.
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Affiliation(s)
- Ngoc Huu Nguyen
- Induced Resistance and Plant Bioprotection USC INRAE 1488, SFR Condorcet FR-CNRS 3417, University of Reims, UFR Sciences, Campus Moulin de la Housse, 51687 Reims Cedex 02, France
- Department of Plant Biology, Faculty of Agriculture and Forestry, Tay Nguyen University, 567 Le Duan, Daklak, Vietnam
| | - Patricia Trotel-Aziz
- Induced Resistance and Plant Bioprotection USC INRAE 1488, SFR Condorcet FR-CNRS 3417, University of Reims, UFR Sciences, Campus Moulin de la Housse, 51687 Reims Cedex 02, France
| | - Sandra Villaume
- Induced Resistance and Plant Bioprotection USC INRAE 1488, SFR Condorcet FR-CNRS 3417, University of Reims, UFR Sciences, Campus Moulin de la Housse, 51687 Reims Cedex 02, France
| | - Fanja Rabenoelina
- Induced Resistance and Plant Bioprotection USC INRAE 1488, SFR Condorcet FR-CNRS 3417, University of Reims, UFR Sciences, Campus Moulin de la Housse, 51687 Reims Cedex 02, France
| | - Christophe Clément
- Induced Resistance and Plant Bioprotection USC INRAE 1488, SFR Condorcet FR-CNRS 3417, University of Reims, UFR Sciences, Campus Moulin de la Housse, 51687 Reims Cedex 02, France
| | - Fabienne Baillieul
- Induced Resistance and Plant Bioprotection USC INRAE 1488, SFR Condorcet FR-CNRS 3417, University of Reims, UFR Sciences, Campus Moulin de la Housse, 51687 Reims Cedex 02, France
| | - Aziz Aziz
- Induced Resistance and Plant Bioprotection USC INRAE 1488, SFR Condorcet FR-CNRS 3417, University of Reims, UFR Sciences, Campus Moulin de la Housse, 51687 Reims Cedex 02, France
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14
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Agati G, Brunetti C, Tuccio L, Degano I, Tegli S. Retrieving the in vivo Scopoletin Fluorescence Excitation Band Allows the Non-invasive Investigation of the Plant-Pathogen Early Events in Tobacco Leaves. Front Microbiol 2022; 13:889878. [PMID: 35572685 PMCID: PMC9100583 DOI: 10.3389/fmicb.2022.889878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 03/25/2022] [Indexed: 11/13/2022] Open
Abstract
In this study, we developed and applied a new spectroscopic fluorescence method for the in vivo detection of the early events in the interaction between tobacco (Nicotiana tabacum L.) plants and pathogenic bacteria. The leaf disks were infiltrated with a bacterial suspension in sterile physiological solution (SPS), or with SPS alone as control. The virulent Pseudomonas syringae pv. tabaci strain ATCC 11528, its non-pathogenic ΔhrpA mutant, and the avirulent P. syringae pv. tomato strain DC3000 were used. At different post-infiltration time-points, the in vivo fluorescence spectra on leaf disks were acquired by a fiber bundle-spectrofluorimeter. The excitation spectra of the leaf blue emission at 460 nm, which is mainly due to the accumulation of coumarins following a bacterial infiltration, were processed by using a two-bands Gaussian fitting that enabled us to isolate the scopoletin (SCT) contribution. The pH-dependent fluorescence of SCT and scopolin (SCL), as determined by in vitro data and their intracellular localization, as determined by confocal microscopy, suggested the use of the longer wavelength excitation band at 385 nm of 460 nm emission (F385_460) to follow the metabolic evolution of SCT during the plant-bacteria interaction. It was found to be directly correlated (R 2 = 0.84) to the leaf SCT content, but not to that of SCL, determined by HPLC analysis. The technique applied to the time-course monitoring of the bacteria-plant interaction clearly showed that the amount and the timing of SCT accumulation, estimated by F385_460, was correlated with the resistance to the pathogen. As expected, this host defense response was delayed after P. syringae pv. tabaci ATCC 11528 infiltration, in comparison to P. syringae pv. tomato DC3000. Furthermore, no significant increase of F385_460 (SCT) was observed when using the non-pathogenic ΔhrpA mutant of P. syringae pv. tabaci ATCC 11528, which lacks a functional Type Three Secretion System (TTSS). Our study showed the reliability of the developed fluorimetric method for a rapid and non-invasive monitoring of bacteria-induced first events related to the metabolite-based defense response in tobacco leaves. This technique could allow a fast selection of pathogen-resistant cultivars, as well as the on-site early diagnosis of tobacco plant diseases by using suitable fluorescence sensors.
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Affiliation(s)
- Giovanni Agati
- Istituto di Fisica Applicata “Nello Carrara” (IFAC), Consiglio Nazionale delle Ricerche, Sesto Fiorentino, Italy
- Consortium INSTM-Italian Interuniversity Consortium for Science and Technology of Materials, Firenze, Italy
| | - Cecilia Brunetti
- Istituto per la Protezione Sostenibile delle Piante (IPSP), Consiglio Nazionale delle Ricerche, Sesto Fiorentino, Italy
| | - Lorenza Tuccio
- Istituto di Fisica Applicata “Nello Carrara” (IFAC), Consiglio Nazionale delle Ricerche, Sesto Fiorentino, Italy
- Consortium INSTM-Italian Interuniversity Consortium for Science and Technology of Materials, Firenze, Italy
| | - Ilaria Degano
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Pisa, Italy
| | - Stefania Tegli
- Consortium INSTM-Italian Interuniversity Consortium for Science and Technology of Materials, Firenze, Italy
- Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Sesto Fiorentino, Italy
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15
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Liu C, Su Y, Li J, Jia B, Cao Z, Qin G. Physiological adjustment of pomegranate pericarp responding to sunburn and its underlying molecular mechanisms. BMC PLANT BIOLOGY 2022; 22:169. [PMID: 35369864 PMCID: PMC8978398 DOI: 10.1186/s12870-022-03534-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 03/11/2022] [Indexed: 06/01/2023]
Abstract
BACKGROUND Sunburn is common in pomegranate, and sunburned fruits have poor appearance and low marketability. However, the physiological and metabolic responses to sunburn and their underlying molecular mechanisms in pomegranate fruit are little understood. Fruit of sunburn-sensitive cultivar 'Hongyushizi' was used to carry out physiological parameter detection and widely-targeted metabolomics and transcriptome study. RESULTS Malondialdehyde and relative conductivity increased with the severity of sunburn, which indicated increased membrane injury. Meanwhile, the content of antioxidants (total phenols and flavonoids), which reduce and repair membrane damage, increased and were accompanied by increases in total antioxidant capacity. In sunburned fruits compared with controls, 129 metabolites changed (including naringenin, pelargonidin and kaempferol) and 447 differentially expressed genes including CHI (Pgr25966.1), F3'5'H (Pgr26644.1), and CHS (Pgr005566.1) may have contributed to these changes. Transcription factors, such as NAC 5 (Pgr008725.1), MYB 93 (Pgr001791.1), and MYB 111 (Pgr027973.1) may be involved in phenylpropanoid and flavonoid biosynthesis by regulating the CHI, F3'5'H, and CHS etc. CONCLUSIONS: These findings provide insight into the sunburn mechanisms of pomegranate, and also into the genetic improvement of fruit sunburn.
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Affiliation(s)
- Chunyan Liu
- Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crops, Institute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
- Key Laboratory of Fruit Quality and Developmental Biology, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
| | - Ying Su
- Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crops, Institute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
- Key Laboratory of Fruit Quality and Developmental Biology, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
| | - Jiyu Li
- Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crops, Institute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
- Key Laboratory of Fruit Quality and Developmental Biology, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
| | - Botao Jia
- Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crops, Institute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
- Key Laboratory of Fruit Quality and Developmental Biology, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
| | - Zhen Cao
- Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crops, Institute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
- Key Laboratory of Fruit Quality and Developmental Biology, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
| | - Gaihua Qin
- Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crops, Institute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, 230031, China.
- Key Laboratory of Fruit Quality and Developmental Biology, Anhui Academy of Agricultural Sciences, Hefei, 230031, China.
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16
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Zhang M, Liu S, Wang Z, Yuan Y, Zhang Z, Liang Q, Yang X, Duan Z, Liu Y, Kong F, Liu B, Ren B, Tian Z. Progress in soybean functional genomics over the past decade. PLANT BIOTECHNOLOGY JOURNAL 2022; 20:256-282. [PMID: 34388296 PMCID: PMC8753368 DOI: 10.1111/pbi.13682] [Citation(s) in RCA: 57] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 08/04/2021] [Accepted: 08/09/2021] [Indexed: 05/24/2023]
Abstract
Soybean is one of the most important oilseed and fodder crops. Benefiting from the efforts of soybean breeders and the development of breeding technology, large number of germplasm has been generated over the last 100 years. Nevertheless, soybean breeding needs to be accelerated to meet the needs of a growing world population, to promote sustainable agriculture and to address future environmental changes. The acceleration is highly reliant on the discoveries in gene functional studies. The release of the reference soybean genome in 2010 has significantly facilitated the advance in soybean functional genomics. Here, we review the research progress in soybean omics (genomics, transcriptomics, epigenomics and proteomics), germplasm development (germplasm resources and databases), gene discovery (genes that are responsible for important soybean traits including yield, flowering and maturity, seed quality, stress resistance, nodulation and domestication) and transformation technology during the past decade. At the end, we also briefly discuss current challenges and future directions.
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Affiliation(s)
- Min Zhang
- State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyInnovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
| | - Shulin Liu
- State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyInnovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
| | - Zhao Wang
- State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyInnovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
- University of Chinese Academy of SciencesBeijingChina
| | - Yaqin Yuan
- State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyInnovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
- University of Chinese Academy of SciencesBeijingChina
| | - Zhifang Zhang
- State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyInnovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
- University of Chinese Academy of SciencesBeijingChina
| | - Qianjin Liang
- State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyInnovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
- University of Chinese Academy of SciencesBeijingChina
| | - Xia Yang
- State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyInnovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
- University of Chinese Academy of SciencesBeijingChina
| | - Zongbiao Duan
- State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyInnovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
- University of Chinese Academy of SciencesBeijingChina
| | - Yucheng Liu
- State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyInnovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
| | - Fanjiang Kong
- Innovative Center of Molecular Genetics and EvolutionSchool of Life SciencesGuangzhou UniversityGuangzhouChina
| | - Baohui Liu
- Innovative Center of Molecular Genetics and EvolutionSchool of Life SciencesGuangzhou UniversityGuangzhouChina
| | - Bo Ren
- State Key Laboratory of Plant GenomicsInstitute of Genetics and Developmental BiologyInnovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
- University of Chinese Academy of SciencesBeijingChina
| | - Zhixi Tian
- State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyInnovative Academy for Seed DesignChinese Academy of SciencesBeijingChina
- University of Chinese Academy of SciencesBeijingChina
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17
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Yang L, Wei Z, Li S, Xiao R, Xu Q, Ran Y, Ding W. Plant secondary metabolite, daphnetin reduces extracellular polysaccharides production and virulence factors of Ralstonia solanacearum. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 179:104948. [PMID: 34802533 DOI: 10.1016/j.pestbp.2021.104948] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 07/18/2021] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
Plants deploy a variety of secondary metabolites to fend off pathogen attack. Certain plants could accumulate coumarins in response to infection of bacteria, fungi, virus and oomycetes. Although coumarins are generally considered toxic to microbes, the exact mechanisms are often unknown. Here, we showed that a plant secondary metabolite daphnetin functions primarily by inhibiting Ralstonia solanacearum extracellular polysaccharides (EPS) production and biofilm formation in vitro, through suppressing genes expression of xpsR, epsE, epsB and lexM. Indeed, daphnetin significantly impaired virulence of R. solanacearum on tobacco plants. Transcriptional analysis suggested that daphnetin suppresses EPS synthesis cluster genes expression through transcriptional regulator XpsR. And daphnetin alter mainly virulence factors genes involved in type III secretion system, and type IV secretion system. R. solanacearum lacking EPS synthesis genes (epsB and epsC) that do not produce EPS, showed less virulence on tobacco plants. Molecular docking results indicated that the critical residues of domain in the binding pocket of the EpsB protein interact with daphnetin via conventional hydrogen bonding and hydrophobic interactions. Collectively, we found that daphnetin has potential as a novel virulence inhibitor of R. solanacearum, directly regulates EPS synthesis genes expression.
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Affiliation(s)
- Liang Yang
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Zhouling Wei
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Shili Li
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Rui Xiao
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Qinqin Xu
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Yuao Ran
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Wei Ding
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China.
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18
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Beyer SF, Bel PS, Flors V, Schultheiss H, Conrath U, Langenbach CJG. Disclosure of salicylic acid and jasmonic acid-responsive genes provides a molecular tool for deciphering stress responses in soybean. Sci Rep 2021; 11:20600. [PMID: 34663865 PMCID: PMC8523552 DOI: 10.1038/s41598-021-00209-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 10/07/2021] [Indexed: 11/09/2022] Open
Abstract
Hormones orchestrate the physiology of organisms. Measuring the activity of defense hormone-responsive genes can help understanding immune signaling and facilitate breeding for plant health. However, different from model species like Arabidopsis, genes that respond to defense hormones salicylic acid (SA) and jasmonic acid (JA) have not been disclosed in the soybean crop. We performed global transcriptome analyses to fill this knowledge gap. Upon exogenous application, endogenous levels of SA and JA increased in leaves. SA predominantly activated genes linked to systemic acquired resistance and defense signaling whereas JA mainly activated wound response-associated genes. In general, SA-responsive genes were activated earlier than those responding to JA. Consistent with the paradigm of biotrophic pathogens predominantly activating SA responses, free SA and here identified most robust SA marker genes GmNIMIN1, GmNIMIN1.2 and GmWRK40 were induced upon inoculation with Phakopsora pachyrhizi, whereas JA marker genes did not respond to infection with the biotrophic fungus. Spodoptera exigua larvae caused a strong accumulation of JA-Ile and JA-specific mRNA transcripts of GmBPI1, GmKTI1 and GmAAT whereas neither free SA nor SA-marker gene transcripts accumulated upon insect feeding. Our study provides molecular tools for monitoring the dynamic accumulation of SA and JA, e.g. in a given stress condition.
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Affiliation(s)
- Sebastian F Beyer
- Plant Biochemistry & Molecular Biology Unit, Department of Plant Physiology, RWTH Aachen University, 52074, Aachen, Germany
| | - Paloma Sánchez Bel
- Metabolic Integration and Cell Signaling Laboratory, Plant Physiology Department of CAMN, Universitat Jaume I, 12071, Castellón, Spain
| | - Victor Flors
- Metabolic Integration and Cell Signaling Laboratory, Plant Physiology Department of CAMN, Universitat Jaume I, 12071, Castellón, Spain
| | - Holger Schultheiss
- Agricultural Center, BASF Plant Science Company GmbH, 67117, Limburgerhof, Germany
| | - Uwe Conrath
- Plant Biochemistry & Molecular Biology Unit, Department of Plant Physiology, RWTH Aachen University, 52074, Aachen, Germany
| | - Caspar J G Langenbach
- Plant Biochemistry & Molecular Biology Unit, Department of Plant Physiology, RWTH Aachen University, 52074, Aachen, Germany.
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19
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Gratz R, von der Mark C, Ivanov R, Brumbarova T. Fe acquisition at the crossroad of calcium and reactive oxygen species signaling. CURRENT OPINION IN PLANT BIOLOGY 2021; 63:102048. [PMID: 34015752 DOI: 10.1016/j.pbi.2021.102048] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/10/2021] [Accepted: 03/30/2021] [Indexed: 06/12/2023]
Abstract
Due to its redox properties, iron is both essential and toxic. Therefore, soil iron availability variations pose a significant problem for plants. Recent evidence suggests that calcium and reactive oxygen species coordinate signaling events related to soil iron acquisition. Calcium was found to affect directly IRT1-mediated iron import through the lipid-binding protein EHB1 and to trigger a CBL-CIPK-mediated signaling influencing the activity of the key iron-acquisition transcription factor FIT. In parallel, under prolonged iron deficiency, reactive oxygen species both inhibit FIT function and depend on FIT through the function of the catalase CAT2. We discuss the role of calcium and reactive oxygen species signaling in iron acquisition, with post-translational mechanisms influencing the localization and activity of iron-acquisition regulators and effectors.
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Affiliation(s)
- Regina Gratz
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden
| | - Claudia von der Mark
- Group of Plant Vascular Development, Swiss Federal Institute of Technology (ETH) Zurich, 8092 Zurich, Switzerland
| | - Rumen Ivanov
- Institute of Botany, Heinrich Heine University, 40225 Düsseldorf, Germany
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Kang S, Lumactud R, Li N, Bell TH, Kim HS, Park SY, Lee YH. Harnessing Chemical Ecology for Environment-Friendly Crop Protection. PHYTOPATHOLOGY 2021; 111:1697-1710. [PMID: 33908803 DOI: 10.1094/phyto-01-21-0035-rvw] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Heavy reliance on synthetic pesticides for crop protection has become increasingly unsustainable, calling for robust alternative strategies that do not degrade the environment and vital ecosystem services. There are numerous reports of successful disease control by various microbes used in small-scale trials. However, inconsistent efficacy has hampered their large-scale application. A better understanding of how beneficial microbes interact with plants, other microbes, and the environment and which factors affect disease control efficacy is crucial to deploy microbial agents as effective and reliable pesticide alternatives. Diverse metabolites produced by plants and microbes participate in pathogenesis and defense, regulate the growth and development of themselves and neighboring organisms, help maintain cellular homeostasis under various environmental conditions, and affect the assembly and activity of plant and soil microbiomes. However, research on the metabolites associated with plant health-related processes, except antibiotics, has not received adequate attention. This review highlights several classes of metabolites known or suspected to affect plant health, focusing on those associated with biocontrol and belowground plant-microbe and microbe-microbe interactions. The review also describes how new insights from systematic explorations of the diversity and mechanism of action of bioactive metabolites can be harnessed to develop novel crop protection strategies.
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Affiliation(s)
- Seogchan Kang
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Rhea Lumactud
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Ningxiao Li
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Terrence H Bell
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Hye-Seon Kim
- USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, Mycotoxin Prevention and Applied Microbiology Research Unit, Peoria, IL 61604, U.S.A
| | - Sook-Young Park
- Department of Agricultural Life Science, Sunchon National University, Suncheon 57922, Korea
| | - Yong-Hwan Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Korea
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21
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Han S, Yang L, Wang Y, Ran Y, Li S, Ding W. Preliminary Studies on the Antibacterial Mechanism of a New Plant-Derived Compound, 7-Methoxycoumarin, Against Ralstonia solanacearum. Front Microbiol 2021; 12:697911. [PMID: 34421853 PMCID: PMC8377673 DOI: 10.3389/fmicb.2021.697911] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 07/19/2021] [Indexed: 12/04/2022] Open
Abstract
Ralstonia solanacearum (R. solanacearum) is one of the most devastating plant bacterial pathogens and leads to serious economic losses in crops worldwide. In this study, the antibacterial mechanism of 7-methoxycoumarin, a new coumarin antibiotic, was preliminarily investigated by the observation of symptoms and physical and biochemical analyses. The results showed that 7-methoxycoumarin significantly suppressed bacterial growth of R. solanacearum, with the minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) values of 75 and 175 mg/L, respectively. Electron microscopy observations showed that the bacterial cell membrane was destroyed after 7-methoxycoumarin treatment. Biofilm formation of R. solanacearum was significantly suppressed by 7-methoxycoumarin at concentrations ranging from 25 to 100 mg/L. Furthermore, virulence-associated genes epsE, hrpG, and popA of R. solanacearum were significantly inhibited by 7-methoxycoumarin. The application of 7-methoxycoumarin effectively suppressed tobacco bacterial wilt progress in pot experiments, with relative control efficiencies of 83.61, 68.78, and 58.11% at 6, 8, and 10 days post inoculation, respectively.
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Affiliation(s)
- Songting Han
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing, China
| | - Liang Yang
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing, China
| | - Yao Wang
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing, China
| | - Yuao Ran
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing, China
| | - Shili Li
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing, China
| | - Wei Ding
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing, China
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22
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Yang L, Wang Y, He X, Xiao Q, Han S, Jia Z, Li S, Ding W. Discovery of a novel plant-derived agent against Ralstonia solanacearum by targeting the bacterial division protein FtsZ. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 177:104892. [PMID: 34301354 DOI: 10.1016/j.pestbp.2021.104892] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/16/2021] [Accepted: 06/02/2021] [Indexed: 06/13/2023]
Abstract
Ralstonia solanacearum (R. solanacearum) is one of the most devastating bacterial pathogens and leads to serious economic losses in crops worldwide. In this study, the antibacterial activities of novel plant-derived coumarins against R. solanacearum and their underlying mechanisms were initially investigated. The bioactivity assay results showed that certain coumarins had significant in vitro inhibitory effects against R. solanacearum. Notably, 6-methylcoumarin showed the best in vitro antibacterial activity with 76.79%. Interestingly, 6-methylcoumarin was found to cause cell elongation, disrupt cell division, and suppress the expression of the bacterial division protein coding genes ftsZ. Compared with the control treatment, the ∆ftsZ mutant inhibited bacterial growth and caused the bacteria to be more sensitive to 6-methylcoumarin. The application of 6-methylcoumarin effectively suppressed the development of tobacco bacterial wilt in pot and field experiments, and significantly reduced the bacterial population in tobacco stems. The control efficiency of 6-methylcoumarin treatment was 35.76%, 40.51%, 38.99% at 10, 11, and 12 weeks after tobacco transplantation in field condition. All of these results demonstrate that 6-methylcoumarin has potential as an eco-friendly and target specificity agent for controlling tobacco bacterial wilt.
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Affiliation(s)
- Liang Yang
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Yao Wang
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Xiaobin He
- Chongqing Tobacco Industry Co., Ltd., Chongqing 400060, China
| | - Qingli Xiao
- Chongqing Tobacco Industry Co., Ltd., Chongqing 400060, China
| | - Songting Han
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Zhou Jia
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Shili Li
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Wei Ding
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest University, Chongqing 400715, China.
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Amobonye A, Bhagwat P, Ranjith D, Mohanlall V, Pillai S. Characterisation, pathogenicity and hydrolytic enzyme profiling of selected Fusarium species and their inhibition by novel coumarins. Arch Microbiol 2021; 203:3495-3508. [PMID: 33912984 DOI: 10.1007/s00203-021-02335-1] [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: 01/17/2021] [Revised: 04/12/2021] [Accepted: 04/13/2021] [Indexed: 11/30/2022]
Abstract
Three Fusarium species isolated locally were characterised by the amplification of their rDNA ITS region, host specificity, and hydrolytic enzyme production. The strains were identified as Fusarium pseudoanthophilum, which is being reported for the first time in South Africa, as well as F. foetens and F. fujikuroi. All the three strains were capable of infecting vegetables such as tomatoes, bell and cayenne peppers, belonging to the Solanaceae family. The Fusarium strains also showed significant production of cell wall degrading enzymes in vitro, such as amylase, cellulase, xylanase, and polygalacturonase, thus highlighting the possibilities of these enzymes as pathogenic factors. Subsequently, the strains were discovered to be susceptible to three halogenated coumarins. The most effective of the tested coumarins, 6-bromo3-2,2-dibromoacetyl-2H-chromen-2-one, showed MIC values of 0.125, 0.0625 and 0.125 mg/ml against F. foetens, F. pseudoanthophilum and F. fujikuroi, respectively. The antifungal potentials of the halogenated coumarins were confirmed in silico through PASS analysis, toxicity prediction and docking studies. Findings from this study demonstrate the use of these coumarins as potential control agents against the Fusarium species and other pathogenic fungi in general.
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Affiliation(s)
- Ayodeji Amobonye
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P.O. BOX 1334, Durban, 4000, South Africa
| | - Prashant Bhagwat
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P.O. BOX 1334, Durban, 4000, South Africa
| | - Divona Ranjith
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P.O. BOX 1334, Durban, 4000, South Africa
| | - Viresh Mohanlall
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P.O. BOX 1334, Durban, 4000, South Africa
| | - Santhosh Pillai
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P.O. BOX 1334, Durban, 4000, South Africa.
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24
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Silva E, Perez da Graça J, Porto C, Martin do Prado R, Nunes E, Corrêa Marcelino-Guimarães F, Conrado Meyer M, Jorge Pilau E. Untargeted Metabolomics Analysis by UHPLC-MS/MS of Soybean Plant in a Compatible Response to Phakopsora pachyrhizi Infection. Metabolites 2021; 11:metabo11030179. [PMID: 33808519 PMCID: PMC8003322 DOI: 10.3390/metabo11030179] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/10/2021] [Accepted: 02/16/2021] [Indexed: 01/11/2023] Open
Abstract
Phakopsora pachyrhizi is a biotrophic fungus, causer of the disease Asian Soybean Rust, a severe crop disease of soybean and one that demands greater investment from producers. Thus, research efforts to control this disease are still needed. We investigated the expression of metabolites in soybean plants presenting a resistant genotype inoculated with P. pachyrhizi through the untargeted metabolomics approach. The analysis was performed in control and inoculated plants with P. pachyrhizi using UHPLC-MS/MS. Principal component analysis (PCA) and the partial least squares discriminant analysis (PLS-DA), was applied to the data analysis. PCA and PLS-DA resulted in a clear separation and classification of groups between control and inoculated plants. The metabolites were putative classified and identified using the Global Natural Products Social Molecular Networking platform in flavonoids, isoflavonoids, lipids, fatty acyls, terpenes, and carboxylic acids. Flavonoids and isoflavonoids were up-regulation, while terpenes were down-regulated in response to the soybean–P. pachyrhizi interaction. Our data provide insights into the potential role of some metabolites as flavonoids and isoflavonoids in the plant resistance to ASR. This information could result in the development of resistant genotypes of soybean to P. pachyrhizi, and effective and specific products against the pathogen.
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Affiliation(s)
- Evandro Silva
- Laboratory of Biomolecules and Mass Spectrometry, Department of Chemistry, State University of Maringá, 5790, Colombo Av, Maringá 87020-080, PR, Brazil; (E.S.); (C.P.); (R.M.d.P.)
| | - José Perez da Graça
- Brazilian Agricultural Research Corporation Soybean, Carlos João Strass Rd, Londrina 86001-970, PR, Brazil; (J.P.d.G.); (F.C.M.-G.); (M.C.M.)
| | - Carla Porto
- Laboratory of Biomolecules and Mass Spectrometry, Department of Chemistry, State University of Maringá, 5790, Colombo Av, Maringá 87020-080, PR, Brazil; (E.S.); (C.P.); (R.M.d.P.)
- MsBioscience, Quintino Bocaiúva 298, Street, Maringá 87020-160, PR, Brazil
| | - Rodolpho Martin do Prado
- Laboratory of Biomolecules and Mass Spectrometry, Department of Chemistry, State University of Maringá, 5790, Colombo Av, Maringá 87020-080, PR, Brazil; (E.S.); (C.P.); (R.M.d.P.)
| | - Estela Nunes
- Brazilian Agricultural Research Corporation Swine & Poultry, BR-153, Km 110 Rd, Concórdia 89715-899, SC, Brazil;
| | | | - Mauricio Conrado Meyer
- Brazilian Agricultural Research Corporation Soybean, Carlos João Strass Rd, Londrina 86001-970, PR, Brazil; (J.P.d.G.); (F.C.M.-G.); (M.C.M.)
| | - Eduardo Jorge Pilau
- Laboratory of Biomolecules and Mass Spectrometry, Department of Chemistry, State University of Maringá, 5790, Colombo Av, Maringá 87020-080, PR, Brazil; (E.S.); (C.P.); (R.M.d.P.)
- Correspondence:
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25
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Trapet PL, Verbon EH, Bosma RR, Voordendag K, Van Pelt JA, Pieterse CMJ. Mechanisms underlying iron deficiency-induced resistance against pathogens with different lifestyles. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:2231-2241. [PMID: 33188427 DOI: 10.1093/jxb/eraa535] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 11/10/2020] [Indexed: 05/10/2023]
Abstract
Iron (Fe) is a poorly available mineral nutrient which affects the outcome of many cross-kingdom interactions. In Arabidopsis thaliana, Fe starvation limits infection by necrotrophic pathogens. Here, we report that Fe deficiency also reduces disease caused by the hemi-biotrophic bacterium Pseudomonas syringae and the biotrophic oomycete Hyaloperonospora arabidopsidis, indicating that Fe deficiency-induced resistance is effective against pathogens with different lifestyles. Furthermore, we show that Fe deficiency-induced resistance is not caused by withholding Fe from the pathogen but is a plant-mediated defense response that requires activity of ethylene and salicylic acid. Because rhizobacteria-induced systemic resistance (ISR) is associated with a transient up-regulation of the Fe deficiency response, we tested whether Fe deficiency-induced resistance and ISR are similarly regulated. However, Fe deficiency-induced resistance functions independently of the ISR regulators MYB72 and BGLU42, indicating that both types of induced resistance are regulated in a different manner. Mutants opt3 and frd1, which display misregulated Fe homeostasis under Fe-sufficient conditions, show disease resistance levels comparable with those of Fe-starved wild-type plants. Our results suggest that disturbance of Fe homeostasis, through Fe starvation stress or other non-homeostatic conditions, is sufficient to prime the plant immune system for enhanced defense.
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Affiliation(s)
- Pauline L Trapet
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan, CH Utrecht, The Netherlands
| | - Eline H Verbon
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan, CH Utrecht, The Netherlands
| | - Renda R Bosma
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan, CH Utrecht, The Netherlands
| | - Kirsten Voordendag
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan, CH Utrecht, The Netherlands
| | - Johan A Van Pelt
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan, CH Utrecht, The Netherlands
| | - Corné M J Pieterse
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan, CH Utrecht, The Netherlands
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26
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Liu Y, Kong D, Wu HL, Ling HQ. Iron in plant-pathogen interactions. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:2114-2124. [PMID: 33161430 DOI: 10.1093/jxb/eraa516] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 10/31/2020] [Indexed: 06/11/2023]
Abstract
Iron is an essential element for most organisms. As an indispensable co-factor of many enzymes, iron is involved in various crucial metabolic processes that are required for the survival of plants and pathogens. Conversely, excessive iron produces highly active reactive oxygen species, which are toxic to the cells of plants and pathogens. Therefore, plants and pathogens have evolved sophisticated mechanisms to modulate iron status at a moderate level for maintaining their fitness. Over the past decades, many efforts have been made to reveal these mechanisms, and some progress has been made. In this review, we describe recent advances in understanding the roles of iron in plant-pathogen interactions and propose prospects for future studies.
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Affiliation(s)
- Yi Liu
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, Jiangxi, China
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Danyu Kong
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, Jiangxi, China
| | - Hui-Lan Wu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Hong-Qing Ling
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
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27
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Yu K, Stringlis IA, van Bentum S, de Jonge R, Snoek BL, Pieterse CMJ, Bakker PAHM, Berendsen RL. Transcriptome Signatures in Pseudomonas simiae WCS417 Shed Light on Role of Root-Secreted Coumarins in Arabidopsis-Mutualist Communication. Microorganisms 2021; 9:microorganisms9030575. [PMID: 33799825 PMCID: PMC8000642 DOI: 10.3390/microorganisms9030575] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 12/22/2022] Open
Abstract
Pseudomonas simiae WCS417 is a root-colonizing bacterium with well-established plant-beneficial effects. Upon colonization of Arabidopsis roots, WCS417 evades local root immune responses while triggering an induced systemic resistance (ISR) in the leaves. The early onset of ISR in roots shows similarities with the iron deficiency response, as both responses are associated with the production and secretion of coumarins. Coumarins can mobilize iron from the soil environment and have a selective antimicrobial activity that impacts microbiome assembly in the rhizosphere. Being highly coumarin-tolerant, WCS417 induces the secretion of these phenolic compounds, likely to improve its own niche establishment, while providing growth and immunity benefits for the host in return. To investigate the possible signaling function of coumarins in the mutualistic Arabidopsis-WCS417 interaction, we analyzed the transcriptome of WCS417 growing in root exudates of coumarin-producing Arabidopsis Col-0 and the coumarin-biosynthesis mutant f6′h1. We found that coumarins in F6′H1-dependent root exudates significantly affected the expression of 439 bacterial genes (8% of the bacterial genome). Of those, genes with functions related to transport and metabolism of carbohydrates, amino acids, and nucleotides were induced, whereas genes with functions related to cell motility, the bacterial mobilome, and energy production and conversion were repressed. Strikingly, most genes related to flagellar biosynthesis were down-regulated by F6′H1-dependent root exudates and we found that application of selected coumarins reduces bacterial motility. These findings suggest that coumarins’ function in the rhizosphere as semiochemicals in the communication between the roots and WCS417. Collectively, our results provide important novel leads for future functional analysis of molecular processes in the establishment of plant-mutualist interactions.
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Affiliation(s)
- Ke Yu
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands; (K.Y.); (I.A.S.); (S.v.B.); (R.d.J.); (C.M.J.P.); (P.A.H.M.B.)
- State Key Laboratory of Crop Stress Adaptation and Improvement, Henan University, Kaifeng 475004, China
| | - Ioannis A. Stringlis
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands; (K.Y.); (I.A.S.); (S.v.B.); (R.d.J.); (C.M.J.P.); (P.A.H.M.B.)
| | - Sietske van Bentum
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands; (K.Y.); (I.A.S.); (S.v.B.); (R.d.J.); (C.M.J.P.); (P.A.H.M.B.)
| | - Ronnie de Jonge
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands; (K.Y.); (I.A.S.); (S.v.B.); (R.d.J.); (C.M.J.P.); (P.A.H.M.B.)
- Department of Plant Systems Biology, VIB, Technologiepark 927, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 927, 9052 Ghent, Belgium
| | - Basten L. Snoek
- Theoretical Biology & Bioinformatics, Department of Biology, Science4Life, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands;
| | - Corné M. J. Pieterse
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands; (K.Y.); (I.A.S.); (S.v.B.); (R.d.J.); (C.M.J.P.); (P.A.H.M.B.)
| | - Peter A. H. M. Bakker
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands; (K.Y.); (I.A.S.); (S.v.B.); (R.d.J.); (C.M.J.P.); (P.A.H.M.B.)
| | - Roeland L. Berendsen
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands; (K.Y.); (I.A.S.); (S.v.B.); (R.d.J.); (C.M.J.P.); (P.A.H.M.B.)
- Correspondence: ; Tel.: +31-3025-36860
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28
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Stassen MJJ, Hsu SH, Pieterse CMJ, Stringlis IA. Coumarin Communication Along the Microbiome-Root-Shoot Axis. TRENDS IN PLANT SCIENCE 2021; 26:169-183. [PMID: 33023832 DOI: 10.1016/j.tplants.2020.09.008] [Citation(s) in RCA: 84] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 09/06/2020] [Accepted: 09/08/2020] [Indexed: 05/06/2023]
Abstract
Plants shape their rhizosphere microbiome by secreting root exudates into the soil environment. Recently, root-exuded coumarins were identified as novel players in plant-microbiome communication. Beneficial members of the root-associated microbiome stimulate coumarin biosynthesis in roots and their excretion into the rhizosphere. The iron-mobilizing activity of coumarins facilitates iron uptake from the soil environment, while their selective antimicrobial activity shapes the root microbiome, resulting in promotion of plant growth and health. Evidence is accumulating that, in analogy to strigolactones and flavonoids, coumarins may act in microbiome-to-root-to-shoot signaling events. Here, we review this multifaceted role of coumarins in bidirectional chemical communication along the microbiome-root-shoot axis.
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Affiliation(s)
- Max J J Stassen
- Plant-Microbe Interactions, Department of Biology, Science for Life, Utrecht University, Padualaan 8, 3584, CH, Utrecht, The Netherlands
| | - Shu-Hua Hsu
- Plant-Microbe Interactions, Department of Biology, Science for Life, Utrecht University, Padualaan 8, 3584, CH, Utrecht, The Netherlands; Department of Agronomy, National Taiwan University, No. 1, Section 4, Roosevelt Road, 10617, Taipei, Taiwan
| | - Corné M J Pieterse
- Plant-Microbe Interactions, Department of Biology, Science for Life, Utrecht University, Padualaan 8, 3584, CH, Utrecht, The Netherlands
| | - Ioannis A Stringlis
- Plant-Microbe Interactions, Department of Biology, Science for Life, Utrecht University, Padualaan 8, 3584, CH, Utrecht, The Netherlands.
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29
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Jacoby RP, Koprivova A, Kopriva S. Pinpointing secondary metabolites that shape the composition and function of the plant microbiome. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:57-69. [PMID: 32995888 PMCID: PMC7816845 DOI: 10.1093/jxb/eraa424] [Citation(s) in RCA: 91] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 09/10/2020] [Indexed: 05/02/2023]
Abstract
One of the major questions in contemporary plant science involves determining the functional mechanisms that plants use to shape their microbiome. Plants produce a plethora of chemically diverse secondary metabolites, many of which exert bioactive effects on microorganisms. Several recent publications have unequivocally shown that plant secondary metabolites affect microbiome composition and function. These studies have pinpointed that the microbiome can be influenced by a diverse set of molecules, including: coumarins, glucosinolates, benzoxazinoids, camalexin, and triterpenes. In this review, we summarize the role of secondary metabolites in shaping the plant microbiome, highlighting recent literature. A body of knowledge is now emerging that links specific plant metabolites with distinct microbial responses, mediated via defined biochemical mechanisms. There is significant potential to boost agricultural sustainability via the targeted enhancement of beneficial microbial traits, and here we argue that the newly discovered links between root chemistry and microbiome composition could provide a new set of tools for rationally manipulating the plant microbiome.
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Affiliation(s)
- Richard P Jacoby
- Institute for Plant Sciences, Cluster of Excellence on Plant Sciences (CEPLAS), University of Cologne, Cologne, Germany
| | - Anna Koprivova
- Institute for Plant Sciences, Cluster of Excellence on Plant Sciences (CEPLAS), University of Cologne, Cologne, Germany
| | - Stanislav Kopriva
- Institute for Plant Sciences, Cluster of Excellence on Plant Sciences (CEPLAS), University of Cologne, Cologne, Germany
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30
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Saito H, Yamashita Y, Sakata N, Ishiga T, Shiraishi N, Usuki G, Nguyen VT, Yamamura E, Ishiga Y. Covering Soybean Leaves With Cellulose Nanofiber Changes Leaf Surface Hydrophobicity and Confers Resistance Against Phakopsora pachyrhizi. FRONTIERS IN PLANT SCIENCE 2021; 12:726565. [PMID: 34539719 PMCID: PMC8448067 DOI: 10.3389/fpls.2021.726565] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 08/03/2021] [Indexed: 05/08/2023]
Abstract
Asian soybean rust (ASR) caused by Phakopsora pachyrhizi, an obligate biotrophic fungal pathogen, is the most devastating soybean production disease worldwide. Currently, timely fungicide application is the only means to control ASR in the field. We investigated cellulose nanofiber (CNF) application on ASR disease management. CNF-treated leaves showed reduced lesion number after P. pachyrhizi inoculation compared to control leaves, indicating that covering soybean leaves with CNF confers P. pachyrhizi resistance. We also demonstrated that formation of P. pachyrhizi appressoria, and also gene expression related to these formations, such as chitin synthases (CHSs), were significantly suppressed in CNF-treated soybean leaves compared to control leaves. Moreover, contact angle measurement revealed that CNF converts soybean leaf surface properties from hydrophobic to hydrophilic. These results suggest that CNF can change soybean leaf surface hydrophobicity, conferring resistance against P. pachyrhizi, based on the reduced expression of CHSs, as well as reduced formation of pre-infection structures. This is the first study to investigate CNF application to control field disease.
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Affiliation(s)
- Haruka Saito
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Yuji Yamashita
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Nanami Sakata
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Takako Ishiga
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Nanami Shiraishi
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Giyu Usuki
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Viet Tru Nguyen
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
- Western Highlands Agriculture and Forestry Science Institute, Buon Ma Thuot, Vietnam
| | - Eiji Yamamura
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Yasuhiro Ishiga
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
- *Correspondence: Yasuhiro Ishiga,
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31
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Panstruga R, Moscou MJ. What is the Molecular Basis of Nonhost Resistance? MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2020; 33:1253-1264. [PMID: 32808862 DOI: 10.1094/mpmi-06-20-0161-cr] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This article is part of the Top 10 Unanswered Questions in MPMI invited review series.Nonhost resistance is typically considered the ability of a plant species to repel all attempts of a pathogen species to colonize it and reproduce on it. Based on this common definition, nonhost resistance is presumed to be very durable and, thus, of great interest for its potential use in agriculture. Despite considerable research efforts, the molecular basis of this type of plant immunity remains nebulous. We here stress the fact that "nonhost resistance" is a phenomenological rather than a mechanistic concept that comprises more facets than typically considered. We further argue that nonhost resistance essentially relies on the very same genes and pathways as other types of plant immunity, of which some may act as bottlenecks for particular pathogens on a given plant species or under certain conditions. Thus, in our view, the frequently used term "nonhost genes" is misleading and should be avoided. Depending on the plant-pathogen combination, nonhost resistance may involve the recognition of pathogen effectors by host immune sensor proteins, which might give rise to host shifts or host range expansions due to evolutionary-conditioned gains and losses in respective armories. Thus, the extent of nonhost resistance also defines pathogen host ranges. In some instances, immune-related genes can be transferred across plant species to boost defense, resulting in augmented disease resistance. We discuss future routes for deepening our understanding of nonhost resistance and argue that the confusing term "nonhost resistance" should be used more cautiously in the light of a holistic view of plant immunity.
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Affiliation(s)
- Ralph Panstruga
- RWTH Aachen University, Institute for Biology I, Unit of Plant Molecular Cell Biology, Worringer Weg 1, 52056 Aachen, Germany
| | - Matthew J Moscou
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich, NR4 7UK, United Kingdom
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32
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Cooper B, Beard HS, Garrett WM, Campbell KB. Benzothiadiazole Conditions the Bean Proteome for Immunity to Bean Rust. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2020; 33:600-611. [PMID: 31999214 DOI: 10.1094/mpmi-09-19-0250-r] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The common bean rust fungus reduces harvests of the dry, edible common bean. Natural resistance genes in the plant can provide protection until a fungal strain that breaks resistance emerges. In this study, we demonstrate that benzo(1,2,3)thiadiazole-7-carbothioic acid S-methyl ester (BTH) sprayed on susceptible beans induces resistance to common bean rust. Protection occurred as soon as 72 h after treatment and resulted in no signs of disease 10 days after inoculation with rust spores. By contrast, the susceptible control plants sustained heavy infections and died. To understand the effect BTH has on the bean proteome, we measured the changes of accumulation for 3,973 proteins using mass spectrometry. The set of 409 proteins with significantly increased accumulation in BTH-treated leaves included receptor-like kinases SOBIR1, CERK1, and LYK5, which perceive pathogens, and EDS1, a regulator of the salicylic acid defense pathway. Other proteins that likely contributed to resistance included pathogenesis-related proteins, a full complement of enzymes that catalyze phenylpropanoid biosynthesis, and protein receptors, transporters, and enzymes that modulate other defense responses controlled by jasmonic acid, ethylene, brassinosteroid, abscisic acid, and auxin. Increases in the accumulation of proteins required for vesicle-mediated protein secretion and RNA splicing occurred as well. By contrast, more than half of the 168 decreases belonged to chloroplast proteins and proteins involved in cell expansion. These results reveal a set of proteins needed for rust resistance and reaffirm the utility of BTH to control disease by amplifying the natural immune system of the bean plant.
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Affiliation(s)
- Bret Cooper
- Soybean Genomics and Improvement Laboratory, USDA-ARS, Beltsville, MD, U.S.A
| | - Hunter S Beard
- Soybean Genomics and Improvement Laboratory, USDA-ARS, Beltsville, MD, U.S.A
| | - Wesley M Garrett
- Animal Biosciences and Biotechnology Laboratory, USDA-ARS, Beltsville, MD, U.S.A
| | - Kimberly B Campbell
- Soybean Genomics and Improvement Laboratory, USDA-ARS, Beltsville, MD, U.S.A
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33
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Hiruma K. Roles of Plant-Derived Secondary Metabolites during Interactions with Pathogenic and Beneficial Microbes under Conditions of Environmental Stress. Microorganisms 2019; 7:microorganisms7090362. [PMID: 31540419 PMCID: PMC6780457 DOI: 10.3390/microorganisms7090362] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 09/12/2019] [Accepted: 09/13/2019] [Indexed: 11/16/2022] Open
Abstract
Under natural conditions, plants generate a vast array of secondary metabolites. Several of these accumulate at widely varying levels in the same plant species and are reportedly critical for plant adaptation to abiotic and/or biotic stresses. Some secondary metabolite pathways are required for beneficial interactions with bacterial and fungal microbes and are also regulated by host nutrient availability so that beneficial interactions are enforced. These observations suggest an interplay between host nutrient pathways and the regulation of secondary metabolites that establish beneficial interactions with microbes. In this review, I introduce the roles of tryptophan-derived and phenylpropanoid secondary-metabolite pathways during plant interactions with pathogenic and beneficial microbes and describe how these pathways are regulated by nutrient availability.
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Affiliation(s)
- Kei Hiruma
- Department of Science and Technology, Nara Institute of Science and Technology, Nara 630-0192, Japan.
- PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan.
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Maron L. New strategies in the arms race against soybean rust. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 99:395-396. [PMID: 31348597 DOI: 10.1111/tpj.14464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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