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Piombo E, Vetukuri RR, Konakalla NC, Kalyandurg PB, Sundararajan P, Jensen DF, Karlsson M, Dubey M. RNA silencing is a key regulatory mechanism in the biocontrol fungus Clonostachys rosea-wheat interactions. BMC Biol 2024; 22:219. [PMID: 39343898 PMCID: PMC11441109 DOI: 10.1186/s12915-024-02014-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 09/17/2024] [Indexed: 10/01/2024] Open
Abstract
BACKGROUND Small RNA (sRNAs)- mediated RNA silencing is emerging as a key player in host-microbe interactions. However, its role in fungus-plant interactions relevant to biocontrol of plant diseases is yet to be explored. This study aimed to investigate Dicer (DCL)-mediated endogenous and cross-kingdom gene expression regulation in the biocontrol fungus Clonostachys rosea and wheat roots during interactions. RESULTS C. rosea Δdcl2 strain exhibited significantly higher root colonization than the WT, whereas no significant differences were observed for Δdcl1 strains. Dual RNA-seq revealed the upregulation of CAZymes, membrane transporters, and effector coding genes in C. rosea, whereas wheat roots responded with the upregulation of stress-related genes and the downregulation of growth-related genes. The expression of many of these genes was downregulated in wheat during the interaction with DCL deletion strains, underscoring the influence of fungal DCL genes on wheat defense response. sRNA sequencing identified 18 wheat miRNAs responsive to C. rosea, and three were predicted to target the C. rosea polyketide synthase gene pks29. Two of these miRNAs (mir_17532_x1 and mir_12061_x13) were observed to enter C. rosea from wheat roots with fluorescence analyses and to downregulate the expression of pks29, showing plausible cross-kingdom RNA silencing of the C. rosea gene by wheat miRNAs. CONCLUSIONS We provide insights into the mechanisms underlying the interaction between biocontrol fungi and plant roots. Moreover, the study sheds light on the role of sRNA-mediated gene expression regulation in C. rosea-wheat interactions and provides preliminary evidence of cross-kingdom RNA silencing between plants and biocontrol fungi.
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Affiliation(s)
- Edoardo Piombo
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Ramesh Raju Vetukuri
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Lomma, Sweden
| | - Naga Charan Konakalla
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Lomma, Sweden
| | - Pruthvi B Kalyandurg
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Lomma, Sweden
| | - Poorva Sundararajan
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Lomma, Sweden
| | - Dan Funck Jensen
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Magnus Karlsson
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Mukesh Dubey
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
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Liu Z, Yu Z, Li X, Cheng Q, Li R. Two Sugarcane Expansin Protein-Coding Genes Contribute to Stomatal Aperture Associated with Structural Resistance to Sugarcane Smut. J Fungi (Basel) 2024; 10:631. [PMID: 39330391 PMCID: PMC11433316 DOI: 10.3390/jof10090631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2024] [Revised: 09/01/2024] [Accepted: 09/02/2024] [Indexed: 09/28/2024] Open
Abstract
Sporisorium scitamineum is a biotrophic fungus responsible for inducing sugarcane smut disease that results in significant reductions in sugarcane yield. Resistance mechanisms against sugarcane smut can be categorized into structural, biochemical, and physiological resistance. However, structural resistance has been relatively understudied. This study found that sugarcane variety ZZ9 displayed structural resistance compared to variety GT42 when subjected to different inoculation methods for assessing resistance to smut disease. Furthermore, the stomatal aperture and density of smut-susceptible varieties (ROC22 and GT42) were significantly higher than those of smut-resistant varieties (ZZ1, ZZ6, and ZZ9). Notably, S. scitamineum was found to be capable of entering sugarcane through the stomata on buds. According to the RNA sequencing of the buds of GT42 and ZZ9, seven Expansin protein-encoding genes were identified, of which six were significantly upregulated in GT42. The two genes c111037.graph_c0 and c113583.graph_c0, belonging to the α-Expansin and β-Expansin families, respectively, were functionally characterized, revealing their role in increasing the stomatal aperture. Therefore, these two sugarcane Expansin protein-coding genes contribute to the stomatal aperture, implying their potential roles in structural resistance to sugarcane smut. Our findings deepen the understanding of the role of the stomata in structural resistance to sugarcane smut and highlight their potential in sugarcane breeding for disease resistance.
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Affiliation(s)
- Zongling Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Science and Technology, Guangxi University, Nanning 530004, China
- College of Basic Medical Sciences, Youjiang Medical University for Nationalities, Baise 533000, China
| | - Zhuoxin Yu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Science and Technology, Guangxi University, Nanning 530004, China
| | - Xiufang Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Science and Technology, Guangxi University, Nanning 530004, China
| | - Qin Cheng
- Guangxi Subtropical Crops Research Institute, Nanning 530001, China
| | - Ru Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Science and Technology, Guangxi University, Nanning 530004, China
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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; 114:1295-1304. [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] [MESH Headings] [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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4
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Cai E, Zeng R, Feng R, Zhang L, Li L, Jia H, Zheng W, Chen S, Yan M, Chang C. Discovery of N-Benzyl-4-(1-bromonaphthalen-2-yl)oxybutan-1-amine as a Potential Antifungal Agent against Sporidia Growth and Teliospore Germination of Sporisorium scitamineum. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:3325-3333. [PMID: 38329286 DOI: 10.1021/acs.jafc.3c04589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
The cultivation of sugar cane using perennial roots is the primary planting method, which is one of the reasons for the serious occurrence of sugar cane smut disease caused by the basidiomycetous fungus Sporisorium scitamineum in the sugar cane perennial root planting area. Consequently, it is crucial to eliminate pathogens from perennial sugar cane buds. In this study, we found that MAP kinase Hog1 is necessary for heat stress resistance. Subsequent investigations revealed a significant reduction in the expression of the heat shock protein 104-encoding gene, SsHSP104, in the ss1hog1Δ mutant. Additionally, the overexpression of SsHSP104 partially restored colony growth in the ss1hog1Δ strain following heat stress treatment, demonstrating the crucial role of SsHsp104 in SsHog1-mediated heat stress tolerance. Hence, we constructed the ss1hsp104:eGFP fusion strain in the wild type of S. scitamineum to identify small-molecule compounds that could inhibit the heat stress response, leading to the discovery of N-benzyl-4-(1-bromonaphthalen-2-yl)oxybutan-1-amine as a potential compound that targets the SsHog1 mediation SsHsp104 pathway during heat treatment. Furthermore, the combination of N-benzyl-4-(1-bromonaphthalen-2-yl)oxybutan-1-amine and warm water treatment (45 °C for 15 min) inhibits the growth of S. scitamineum and teliospore germination, thereby reducing the occurrence of sugar cane smut diseases and indicating its potential for eliminating pathogens from perennial sugar cane buds. In conclusion, these findings suggest that N-benzyl-4-(1-bromonaphthalen-2-yl)oxybutan-1-amine is promising as a targeted compound for the SsHog1-mediated SsHsp104 pathway and may enable the reduction of hot water treatment duration and/or temperature, thereby limiting the occurrence of sugar cane smut diseases caused by S. scitamineum.
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Affiliation(s)
- Enping Cai
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong, China
- Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Rong Zeng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong, China
- Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Ruqing Feng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong, China
- Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Li Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong, China
- Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Lei Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong, China
- Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Huan Jia
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong, China
- Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Wenqiang Zheng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong, China
- Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Shaofang Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong, China
- Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Meixin Yan
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530000, China
| | - Changqing Chang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, Guangdong, China
- Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
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Yin K, Cui G, Bi X, Liang M, Hu Z, Deng YZ. Intracellular polyamines regulate redox homeostasis with cAMP-PKA signalling during sexual mating/filamentation and pathogenicity of Sporisorium scitamineum. MOLECULAR PLANT PATHOLOGY 2024; 25:e13393. [PMID: 37814404 PMCID: PMC10782646 DOI: 10.1111/mpp.13393] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Accepted: 09/17/2023] [Indexed: 10/11/2023]
Abstract
Sugarcane smut caused by Sporisorium scitamineum seriously impairs sugarcane production and quality. Sexual mating/filamentation is a critical step of S. scitamineum pathogenesis, yet the regulatory mechanisms are not fully understood. In this study, we identified the SsAGA, SsODC, and SsSAMDC genes, which are involved in polyamine biosynthesis in S. scitamineum. Deletion of SsODC led to complete loss of filamentous growth after sexual mating, and deletion of SsAGA or SsSAMDC caused reduced filamentation. Double deletion of SsODC and SsSAMDC resulted in auxotrophy for putrescine (PUT) and spermidine (SPD) when grown on minimal medium (MM), indicating that these two genes encode enzymes that are critical for PUT and SPD biosynthesis. We further showed that low PUT concentrations promoted S. scitamineum filamentation, while high PUT concentrations suppressed filamentation. Disrupted fungal polyamine biosynthesis also resulted in a loss of pathogenicity and reduced fungal biomass within infected plants at the early infection stage. SPD formed a gradient from the diseased part to nonsymptom parts of the cane stem, suggesting that SPD is probably favourable for fungal virulence. Mutants of the cAMP-PKA (SsGPA3-SsUAC1-SsADR1) signalling pathway displayed up-regulation of the SsODC gene and elevated intracellular levels of PUT. SsODC directly interacted with SsGPA3, and sporidia of the ss1uac1ΔodcΔ mutant displayed abundant pseudohyphae. Furthermore, we found that elevated PUT levels caused accumulation of intracellular reactive oxygen species (ROS), probably by suppressing transcription of ROS-scavenging enzymes, while SPD played the opposite role. Overall, our work proves that polyamines play important roles in the pathogenic development of sugarcane smut fungus, probably by collaboratively regulating intracellular redox homeostasis with the cAMP-PKA signalling pathway.
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Affiliation(s)
- Kai Yin
- Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, College of Plant ProtectionSouth China Agricultural UniversityGuangzhouChina
- Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
| | - Guobing Cui
- Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, College of Plant ProtectionSouth China Agricultural UniversityGuangzhouChina
- Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
| | - Xinping Bi
- Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, College of Plant ProtectionSouth China Agricultural UniversityGuangzhouChina
- Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
| | - Meiling Liang
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Plant ProtectionResearch Institute of Guangdong Academy of Agricultural SciencesGuangzhouChina
| | - Zhijian Hu
- Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, College of Plant ProtectionSouth China Agricultural UniversityGuangzhouChina
- Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
| | - Yi Zhen Deng
- Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, College of Plant ProtectionSouth China Agricultural UniversityGuangzhouChina
- Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhouChina
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Cai E, Jia H, Feng R, Zheng W, Li L, Zhang L, Jiang Z, Chang C. Cytochrome c-peroxidase modulates ROS homeostasis to regulate the sexual mating of Sporisorium scitamineum. Microbiol Spectr 2023; 11:e0205723. [PMID: 37819114 PMCID: PMC10714796 DOI: 10.1128/spectrum.02057-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 08/28/2023] [Indexed: 10/13/2023] Open
Abstract
IMPORTANCE Reactive oxygen species play an important role in pathogen-plant interactions. In fungi, cytochrome c-peroxidase maintains intracellular ROS homeostasis by utilizing H2O2 as an electron acceptor to oxidize ferrocytochrome c, thereby contributing to disease pathogenesis. In this study, our investigation reveals that the cytochrome c-peroxidase encoding gene, SsCCP1, not only plays a key role in resisting H2O2 toxicity but is also essential for the mating/filamentation and pathogenicity of S. scitamineum. We further uncover that SsCcp1 mediates the expression of SsPrf1 by maintaining intracellular ROS homeostasis to regulate S. scitamineum mating/filamentation. Our findings provide novel insights into how cytochrome c-peroxidase regulates sexual reproduction in phytopathogenic fungi, presenting a theoretical foundation for designing new disease control strategies.
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Affiliation(s)
- Enping Cai
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, Guangdong, China
- Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Huan Jia
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, Guangdong, China
- Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Ruqing Feng
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, Guangdong, China
- Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Wenqiang Zheng
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, Guangdong, China
- Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Lei Li
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, Guangdong, China
- Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Li Zhang
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, Guangdong, China
- Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Zide Jiang
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, Guangdong, China
| | - Changqing Chang
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, Guangdong, China
- Integrate Microbiology Research Center, College of Plant Protection, South China Agricultural University, Guangzhou, China
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Bini AP, Rossi GD, Poeschl Y, Serra MCD, Camargo LEA, Monteiro-Vitorello CB, van Sluys MA, van Dam NM, Uthe H, Creste S. Molecular, biochemical and metabolomics analyses reveal constitutive and pathogen-induced defense responses of two sugarcane contrasting genotypes against leaf scald disease. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 203:108033. [PMID: 37757720 DOI: 10.1016/j.plaphy.2023.108033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 08/26/2023] [Accepted: 09/10/2023] [Indexed: 09/29/2023]
Abstract
Leaf scald caused by the bacteria Xanthomonas albilineans is one of the major concerns to sugarcane production. To breed for resistance, mechanisms underlying plant-pathogen interaction need deeper investigations. Herein, we evaluated sugarcane defense responses against X. albilineans using molecular and biochemical approaches to assess pathogen-triggered ROS, phytohormones and metabolomics in two contrasting sugarcane genotypes from 0.5 to 144 h post-inoculation (hpi). In addition, the infection process was monitored using TaqMan-based quantification of X. albilineans and the disease symptoms were evaluated in both genotypes after 15 d post-inoculation (dpi). The susceptible genotype presented a response to the infection at 0.5 hpi, accumulating defense-related metabolites such as phenolics and flavonoids with no significant defense responses thereafter, resulting in typical symptoms of leaf scald at 15 dpi. The resistant genotype did not respond to the infection at 0.5 hpi but constitutively presented higher levels of salicylic acid and of the same metabolites induced by the infection in the susceptible genotype. Moreover, two subsequent pathogen-induced metabolic responses at 12 and 144 hpi were observed only in the resistant genotype in terms of amino acids, quinic acids, coumarins, polyamines, flavonoids, phenolics and phenylpropanoids together with an increase of hydrogen peroxide, ROS-related genes expression, indole-3-acetic-acid and salicylic acid. Multilevel approaches revealed that constitutive chemical composition and metabolic reprogramming hampers the development of leaf scald at 48 and 72 hpi, reducing the disease symptoms in the resistant genotype at 15 dpi. Phenylpropanoid pathway is suggested as a strong candidate marker for breeding sugarcane resistant to leaf scald.
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Affiliation(s)
- Andressa Peres Bini
- Instituto Agronômico (IAC), Centro de Cana, Rodovia Antônio Duarte Nogueira KM 321, 14032-800, Ribeirão Preto, São Paulo, Brazil
| | - Guilherme Duarte Rossi
- Universidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, Via de Acesso Professor Paulo Donato Castellane S/N, 14884-900, Jaboticabal, SP, Brazil
| | - Yvonne Poeschl
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103, Leipzig, Germany; Institute of Biodiversity, Friedrich Schiller University Jena, Jena, Germany
| | - Marina Carnaz Duarte Serra
- Instituto Agronômico (IAC), Centro de Cana, Rodovia Antônio Duarte Nogueira KM 321, 14032-800, Ribeirão Preto, São Paulo, Brazil
| | - Luis Eduardo Aranha Camargo
- Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Av. Pádua Dias 11, 13418-900, Piracicaba, SP, Brazil
| | | | - Marie-Anne van Sluys
- Universidade de São Paulo, Departamento de Botânica - Instituto de Biociências, Rua do Matão 277, 05508-090, São Paulo, SP, Brazil
| | - Nicole M van Dam
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103, Leipzig, Germany; Institute of Biodiversity, Friedrich Schiller University Jena, Jena, Germany
| | - Henriette Uthe
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103, Leipzig, Germany; Institute of Biodiversity, Friedrich Schiller University Jena, Jena, Germany.
| | - Silvana Creste
- Instituto Agronômico (IAC), Centro de Cana, Rodovia Antônio Duarte Nogueira KM 321, 14032-800, Ribeirão Preto, São Paulo, Brazil.
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Chen S, Chen Z, Lin X, Zhou X, Yang S, Tan H. Why different sugarcane cultivars show different resistant abilities to smut? : Comparisons of endophytic microbial compositions and metabolic functions in stems of sugarcane cultivars with different abilities to resist smut. BMC PLANT BIOLOGY 2023; 23:427. [PMID: 37710150 PMCID: PMC10500793 DOI: 10.1186/s12870-023-04446-x] [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: 04/23/2023] [Accepted: 09/06/2023] [Indexed: 09/16/2023]
Abstract
To elucidate the mechanisms underlying the resistance to smut of different sugarcane cultivars, endophytic bacterial and fungal compositions, functions and metabolites in the stems of the sugarcane cultivars were analyzed using high-throughput sequencing techniques and nontargeted metabolomics. The results showed that the levels of ethylene, salicylic acid and jasmonic acid in sugarcane varieties that were not sensitive to smut were all higher than those in sensitive sugarcane varieties. Moreover, endophytic fungi, such as Ramichloridium, Alternaria, Sarocladium, Epicoccum, and Exophiala species, could be considered antagonistic to sugarcane smut. Additionally, the highly active arginine and proline metabolism, pentose phosphate pathway, phenylpropanoid biosynthesis, and tyrosine metabolism in sugarcane varieties that were not sensitive to smut indicated that these pathways contribute to resistance to smut. All of the above results suggested that the relatively highly abundant antagonistic microbes and highly active metabolic functions of endophytes in non-smut-sensitive sugarcane cultivars were important for their relatively high resistance to smut.
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Affiliation(s)
- Siyu Chen
- Guangxi Key Laboratory of Agro-Environment and Agro-Product Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, 100 University Road, Nanning, Guangxi, 530004, P.R. China
| | - Zhongliang Chen
- Guangxi Key Laboratory of Sugarcane Genetic Improvement, Guangxi Academy of Agricultural Sciences, 530007, Guangxi, P.R. China
| | - Xinru Lin
- Guangxi Key Laboratory of Agro-Environment and Agro-Product Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, 100 University Road, Nanning, Guangxi, 530004, P.R. China
| | - Xinyan Zhou
- Guangxi Key Laboratory of Agro-Environment and Agro-Product Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, 100 University Road, Nanning, Guangxi, 530004, P.R. China
| | - Shangdong Yang
- Guangxi Key Laboratory of Agro-Environment and Agro-Product Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, 100 University Road, Nanning, Guangxi, 530004, P.R. China.
| | - Hongwei Tan
- Guangxi Key Laboratory of Sugarcane Genetic Improvement, Guangxi Academy of Agricultural Sciences, 530007, Guangxi, P.R. China.
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Wu Q, Li Z, Yang J, Xu F, Fu X, Xu L, You C, Wang D, Su Y, Que Y. Deciphering the Atlas of Post-Translational Modification in Sugarcane. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37339007 DOI: 10.1021/acs.jafc.3c01886] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
In plants, lysine acetylation (Kac), 2-hydroxyisobutyrylation (Khib), and lysine lactylation (Kla), the three new types of post-translational modification (PTM), play very important roles in growth, development, and resistance to adverse environmental stresses. Herein, we report the first global acetylome, 2-hydroxyisobutyrylome, and lactylome in sugarcane. A total of 8573 Kac, 4637 Khib, and 215 Kla sites across 3903, 1507, and 139 modified proteins were identified. Besides, homology analyses revealed the Kac, Khib, and Kla sites on histones were conserved between sugarcane and rice or poplar. Functional annotations demonstrated that the Kac, Khib, and Kla proteins were mainly involved in energy metabolism. In addition, a number of modified transcription factors and stress-related proteins, which were constitutively expressed in different tissues of sugarcane and induced by drought, cold or Sporisorium scitamineum stress, were identified. Finally, a proposed working mode on how PTM functions in sugarcane was depicted. We thus concluded that PTM should play a role in sugarcane growth, development, and response to biotic and abiotic stresses, but the mechanisms require further investigation. The present study provided the all-new comprehensive profile of proteins Kac, Khib, and Kla and a new perspective to understand the molecular mechanisms of protein PTMs in sugarcane.
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Affiliation(s)
- Qibin Wu
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zhenxiang Li
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jingtao Yang
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Fu Xu
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xueqin Fu
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Liping Xu
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Chuihuai You
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Dongjiao Wang
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yachun Su
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- National Key Laboratory for Tropical Crop Breeding, Kaiyuan, Yunnan 661699, China
| | - Youxiong Que
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- National Key Laboratory for Tropical Crop Breeding, Kaiyuan, Yunnan 661699, China
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Chen Q, Kuang A, Wu H, Liu D, Zhang X, Mao H. Physiological response of CmWRKY15-1 to chrysanthemum white rust based on TRV-VIGS. FRONTIERS IN PLANT SCIENCE 2023; 14:1140596. [PMID: 36968373 PMCID: PMC10036760 DOI: 10.3389/fpls.2023.1140596] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 02/24/2023] [Indexed: 06/18/2023]
Abstract
Chrysanthemum White Rust (CWR) caused by Puccinia horiana Henn. is a major disease in the production process of chrysanthemum, which is widely spread all over the world and can be called "cancer" of chrysanthemum. To clarify the disease resistance function of disease resistance genes can provide a theoretical basis for the utilization and genetic improvement of chrysanthemum resistant varieties. In this study, the resistant cultivar 'China Red' was used as the experimental material. We constructed the silencing vector pTRV2-CmWRKY15-1 and obtained the silenced line named TRV-CmWRKY15-1. The results of enzyme activity after inoculation with pathogenic fungi showed that the activities of antioxidant enzymes SOD, POD, CAT and defense-related enzymes PAL and CHI in leaves were stimulated under the stress of P. horiana. In the WT, the activities of SOD, POD and CAT at the peak value were 1.99 times, 2.84 times and 1.39 times higher than that in TRV-CmWRKY15-1, respectively. And the activities of PALand CHI at the peak were 1.63 times and 1.12 times of TRV-CmWRKY15-1. The content of MDA and soluble sugar also confirmed that chrysanthemum was more susceptible to pathogenic fungi when CmWRKY15-1 was silenced. The expression levels of POD, SOD, PAL and CHI at different time points showed that the expressions of defense enzyme related genes were inhibited in TRV-WRKY15-1 under the infection of P. horiana, which weakened the ability of chrysanthemum to resist white rust. In conclusion, CmWRKY15-1 may increased the resistance of chrysanthemum to white rust by increasing the activity of protective enzyme system, which laid a foundation for breeding new varieties with disease resistance.
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Affiliation(s)
- Qi Chen
- College of Forestry, Shenyang Agricultural University, Shenyang, China
| | - Anchan Kuang
- College of Forestry, Shenyang Agricultural University, Shenyang, China
| | - Haihong Wu
- Institute of Flowers, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Di Liu
- College of Forestry, Shenyang Agricultural University, Shenyang, China
| | - Xin Zhang
- College of Forestry, Shenyang Agricultural University, Shenyang, China
| | - Hongyu Mao
- College of Forestry, Shenyang Agricultural University, Shenyang, China
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Shang H, Fang L, Qin L, Jiang H, Duan Z, Zhang H, Yang Z, Cheng G, Bao Y, Xu J, Yao W, Zhang M. Genome-wide identification of the class III peroxidase gene family of sugarcane and its expression profiles under stresses. FRONTIERS IN PLANT SCIENCE 2023; 14:1101665. [PMID: 36794222 PMCID: PMC9924293 DOI: 10.3389/fpls.2023.1101665] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 01/09/2023] [Indexed: 06/01/2023]
Abstract
INTRODUCTION Plant-specific Class III peroxidases (PRXs) play a crucial role in lignification, cell elongation, seed germination, and biotic and abiotic stresses. METHODS The class III peroxidase gene family in sugarcane were identified by bioinformatics methods and realtime fluorescence quantitative PCR. RESULTS Eighty-two PRX proteins were characterized with a conserved PRX domain as members of the class III PRX gene family in R570 STP. The ShPRX family genes were divided into six groups by the phylogenetic analysis of sugarcane, Saccharum spontaneum, sorghum, rice, and Arabidopsis thaliana. The analysis of promoter cis-acting elements revealed that most ShPRX family genes contained cis-acting regulatory elements involved in ABA, MeJA, light responsiveness, anaerobic induction, and drought inducibility. An evolutionary analysis indicated that ShPRXs was formed after Poaceae and Bromeliaceae diverged, and tandem duplication events played a critical role in the expansion of ShPRX genes of sugarcane. Purifying selection maintained the function of ShPRX proteins. SsPRX genes were differentially expressed in stems and leaves at different growth stages in S. spontaneum. However, ShPRX genes were differentially expressed in the SCMV-inoculated sugarcane plants. A qRT-PCR analysis showed that SCMV, Cd, and salt could specifically induce the expression of PRX genes of sugarcane. DISCUSSION These results help elucidate the structure, evolution, and functions of the class III PRX gene family in sugarcane and provide ideas for the phytoremediation of Cd-contaminated soil and breeding new sugarcane varieties resistant to sugarcane mosaic disease, salt, and Cd stresses.
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Affiliation(s)
- Heyang Shang
- National Engineering Research Center for Sugarcane & Guangxi Key Laboratory of Sugarcane Biology, Fujian Agriculture and Forestry University, Fuzhou, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Nanning, China
| | - Linqi Fang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Nanning, China
| | - Lifang Qin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Nanning, China
| | - Hongtao Jiang
- National Engineering Research Center for Sugarcane & Guangxi Key Laboratory of Sugarcane Biology, Fujian Agriculture and Forestry University, Fuzhou, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Nanning, China
| | - Zhenzhen Duan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Nanning, China
| | - Hai Zhang
- National Engineering Research Center for Sugarcane & Guangxi Key Laboratory of Sugarcane Biology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Zongtao Yang
- National Engineering Research Center for Sugarcane & Guangxi Key Laboratory of Sugarcane Biology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Guangyuan Cheng
- National Engineering Research Center for Sugarcane & Guangxi Key Laboratory of Sugarcane Biology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yixue Bao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Nanning, China
| | - Jingsheng Xu
- National Engineering Research Center for Sugarcane & Guangxi Key Laboratory of Sugarcane Biology, Fujian Agriculture and Forestry University, Fuzhou, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Nanning, China
| | - Wei Yao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Nanning, China
| | - Muqing Zhang
- National Engineering Research Center for Sugarcane & Guangxi Key Laboratory of Sugarcane Biology, Fujian Agriculture and Forestry University, Fuzhou, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Nanning, China
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Yang M, Zhang W, Lv Z, Shi L, Zhang K, Ge B. Induced Defense Response in Soybean to Sclerotinia sclerotiorum Using Wuyiencin from Streptomyces albulus CK-15. PLANT DISEASE 2023; 107:107-115. [PMID: 35771107 DOI: 10.1094/pdis-03-22-0582-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Sclerotinia sclerotiorum (Lib) de Bary, a destructive fungal pathogen with an extensive host range, causes major economic losses to crop production activities globally. Streptomyces spp. produce secondary metabolites with diverse structures and biological activities with potential applications in the control of crop disease. This study explored the potential application of wuyiencin, a secondary metabolite of Streptomyces albulus CK-15, to induce defense responses in soybean against S. sclerotiorum. Lesion size was reduced by nearly 60% in wuyiencin-treated soybean plants compared with plants infected with S. sclerotiorum only in greenhouse experiments. Wuyiencin induced callose deposition at 6 h postinoculation and increased reactive-oxygen-scavenging enzyme activities, including superoxide dismutase, catalase, and peroxidase. Moreover, wuyiencin inoculated before S. sclerotiorum infection significantly increased polyphenol oxidase, phenylalanine ammonia lyase, chitinase, and β-1,3-glucanase activity, suggesting their involvement in soybean defense responses to S. sclerotiorum. Further, qRT-PCR results showed expression levels of the hormone signaling markers CO11, MYC2, PR4, PR1, NPR1, and ERF1 were upregulated in infected leaves treated with wuyiencin.
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Affiliation(s)
- Miaoling Yang
- State Key Laboratory of Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
| | - Wei Zhang
- State Key Laboratory of Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
| | - Zhaoyang Lv
- State Key Laboratory of Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
| | - Liming Shi
- State Key Laboratory of Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
| | - Kecheng Zhang
- State Key Laboratory of Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
| | - Beibei Ge
- State Key Laboratory of Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
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Wu Q, Pan YB, Su Y, Zou W, Xu F, Sun T, Grisham MP, Yang S, Xu L, Que Y. WGCNA Identifies a Comprehensive and Dynamic Gene Co-Expression Network That Associates with Smut Resistance in Sugarcane. Int J Mol Sci 2022; 23:10770. [PMID: 36142681 PMCID: PMC9506403 DOI: 10.3390/ijms231810770] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/02/2022] [Accepted: 09/13/2022] [Indexed: 11/29/2022] Open
Abstract
Sugarcane smut is a major fungal disease caused by Sporisorium scitamineum, which seriously reduces the yield and quality of sugarcane. In this study, 36 transcriptome data were collected from two sugarcane genotypes, YT93-159 (resistant) and ROC22 (susceptible) upon S. scitamineum infection. Data analysis revealed 20,273 (12,659 up-regulated and 7614 down-regulated) and 11,897 (7806 up-regulated and 4091 down-regulated) differentially expressed genes (DEGs) in YT93-159 and ROC22, respectively. A co-expression network was then constructed by weighted gene co-expression network analysis (WGCNA), which identified 5010 DEGs in 15 co-expressed gene modules. Four of the 15 modules, namely, Skyblue, Salmon, Darkorange, and Grey60, were significantly associated with smut resistance. The GO and KEGG enrichment analyses indicated that the DEGs involving in these four modules could be enriched in stress-related metabolic pathways, such as MAPK and hormone signal transduction, plant-pathogen interaction, amino acid metabolism, glutathione metabolism, and flavonoid, and phenylpropanoid biosynthesis. In total, 38 hub genes, including six from the Skyblue module, four from the Salmon module, 12 from the Darkorange module, and 16 from the Grey60 module, were screened as candidate hub genes by calculating gene connectivity in the corresponding network. Only 30 hub genes were amplifiable with RT-qPCR, of which 27 were up-regulated upon S. scitamineum infection. The results were consistent with the trend of gene expression in RNA-Seq, suggesting their positive roles in smut resistance. Interestingly, the expression levels of AOX, Cyb5, and LAC were higher in ROC22 than in YT93-159, indicating these three genes may act as negative regulators in response to S. scitamineum infection. This study revealed the transcriptome dynamics in sugarcane challenged by S. scitamineum infection and provided gene targets for smut resistance breeding in sugarcane.
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Affiliation(s)
- Qibin Wu
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yong-Bao Pan
- USDA-ARS, Southeast Area, Sugarcane Research Unit, Houma, LA 70360, USA
| | - Yachun Su
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Wenhui Zou
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Fu Xu
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Tingting Sun
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | | | - Shaolin Yang
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Yunnan Key Laboratory of Sugarcane Genetic Improvement, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Kaiyuan 661600, China
| | - Liping Xu
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Youxiong Que
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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A Plant-Derived Alkanol Induces Teliospore Germination in Sporisorium scitamineum. J Fungi (Basel) 2022; 8:jof8020209. [PMID: 35205963 PMCID: PMC8878970 DOI: 10.3390/jof8020209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/18/2022] [Accepted: 02/19/2022] [Indexed: 01/27/2023] Open
Abstract
Sugarcane smut caused by the basidiomycetes fungus Sporisorium scitamineum is a devastating disease for the sugarcane industry worldwide. As the initial step, the smut teliospores germinate on sugarcane buds, and subsequently, the mycelium infects the bud tissues. However, chemical signals that induce spore germination are still unknown. By comparison of the behavior of the teliospores on the buds of both resistant and susceptible varieties, we found that spore germination rates were significantly lower on the buds of resistant cultivars ZZ1, ZZ6, and ZZ9 than on the susceptible varieties GT42 and ROC22. It was found that the levels of hexacosanol and octacosanol were higher on the buds of smut-susceptible varieties than on the smut-resistant varieties. These observations were extended to the smut-resistant and smut-susceptible sub-genetic populations derived from the cross of ROC25 and YZ89-7. In artificial surface assays, we found that hexacosanol and octacosanol promoted smut teliospore germination. Transcriptome analysis of smut teliospores under the induction by octacosanol revealed that genes in the MAPK signaling pathway and fatty acid metabolism were significantly differentially expressed. Overall, our results provide evidence that alkanol plays important roles in smut teliospore germination and thus could be used as a potential marker for smut resistance in sugarcane breeding programs.
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Ling H, Fu X, Huang N, Zhong Z, Su W, Lin W, Cui H, Que Y. A sugarcane smut fungus effector simulates the host endogenous elicitor peptide to suppress plant immunity. THE NEW PHYTOLOGIST 2022; 233:919-933. [PMID: 34716592 PMCID: PMC9298926 DOI: 10.1111/nph.17835] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 10/22/2021] [Indexed: 05/03/2023]
Abstract
The smut fungus Sporisorium scitamineum causes the most prevalent disease on sugarcane. The mechanism of its pathogenesis, especially the functions and host targets of its effector proteins, are unknown. In order to identify putative effectors involving in S. scitamineum infection, a weighted gene co-expression network analysis was conducted based on the transcriptome profiles of both smut fungus and sugarcane using a customized microarray. A smut effector gene, termed SsPele1, showed strong co-expression with sugarcane PLANT ELICITOR PEPTIDE RECEPTOR1 (ScPEPR1), which encodes a receptor like kinase for perception of plant elicitor peptide1 (ScPep1). The relationship between SsPele1 and ScPEPR1, and the biological function of SsPele1 were characterized in this study. The SsPele1 C-terminus contains a plant elicitor peptide-like motif, by which SsPele1 interacts strongly with ScPEPR1. Strikingly, the perception of ScPep1 on ScPEPR1 is competed by SsPele1 association, leading to the suppression of ScPEPR1-mediated immune responses. Moreover, the Ustilago maydis effector UmPele1, an ortholog of SsPele1, promotes fungal virulence using the same strategy. This study reveals a novel strategy by which a fungal effector can mimic the plant elicitor peptide to complete its perception and attenuate receptor-activated immunity.
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Affiliation(s)
- Hui Ling
- Key Laboratory of Sugarcane Biology and Genetic BreedingMinistry of AgricultureKey Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of CropsPlant Immunity CenterCollege of Life SciencesFujian Agriculture and Forestry UniversityFuzhou350002China
- College of AgricultureYulin Normal UniversityYulin537000China
| | - Xueqin Fu
- Key Laboratory of Sugarcane Biology and Genetic BreedingMinistry of AgricultureKey Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of CropsPlant Immunity CenterCollege of Life SciencesFujian Agriculture and Forestry UniversityFuzhou350002China
| | - Ning Huang
- College of AgricultureYulin Normal UniversityYulin537000China
| | - Zaofa Zhong
- Key Laboratory of Sugarcane Biology and Genetic BreedingMinistry of AgricultureKey Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of CropsPlant Immunity CenterCollege of Life SciencesFujian Agriculture and Forestry UniversityFuzhou350002China
| | - Weihua Su
- Key Laboratory of Sugarcane Biology and Genetic BreedingMinistry of AgricultureKey Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of CropsPlant Immunity CenterCollege of Life SciencesFujian Agriculture and Forestry UniversityFuzhou350002China
| | - Wenxiong Lin
- Key Laboratory of Sugarcane Biology and Genetic BreedingMinistry of AgricultureKey Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of CropsPlant Immunity CenterCollege of Life SciencesFujian Agriculture and Forestry UniversityFuzhou350002China
| | - Haitao Cui
- Key Laboratory of Sugarcane Biology and Genetic BreedingMinistry of AgricultureKey Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of CropsPlant Immunity CenterCollege of Life SciencesFujian Agriculture and Forestry UniversityFuzhou350002China
| | - Youxiong Que
- Key Laboratory of Sugarcane Biology and Genetic BreedingMinistry of AgricultureKey Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of CropsPlant Immunity CenterCollege of Life SciencesFujian Agriculture and Forestry UniversityFuzhou350002China
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SsPEP1, an Effector with Essential Cellular Functions in Sugarcane Smut Fungus. J Fungi (Basel) 2021; 7:jof7110954. [PMID: 34829241 PMCID: PMC8618092 DOI: 10.3390/jof7110954] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/08/2021] [Accepted: 11/08/2021] [Indexed: 11/17/2022] Open
Abstract
Biotrophic fungi have to infect their host to obtain nutrients and must establish an interaction with the host to complete their life cycle. In this process, effectors play important roles in manipulating the host's immune system to avoid being attacked. Sporisorium scitamineum is the causative agent of sugarcane smut, the most important disease in sugarcane-producing regions worldwide. In this work, we functionally characterized the conserved effector PEP1 in S. scitamineum. The mating process and the expression of genes in the MAPK signaling pathway and the a and b loci were adversely affected in Sspep1-null mutants. The requirement for SsPEP1 in pathogenicity and symptom development was allele dosage-dependent, i.e., deleting one Sspep1 allele in the mating pair turned a normal black whip with abundant teliospores into a white whip with few teliospores; however, deleting both alleles almost abolished infectivity and whip development. ΔSspep1 mutants produced significantly less mycelium mass within infected plants. Additionally, SsPEP1 was identified as a potent inhibitor of sugarcane POD-1a peroxidase activity, implying that SsPEP1 may function to relieve reactive oxygen species-related stress within the host plant. Taken together, our work demonstrated that SsPEP1 is a multifaceted effector essential for S. scitamineum growth, development, and pathogenicity.
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Bhuiyan SA, Magarey RC, McNeil MD, Aitken KS. Sugarcane Smut, Caused by Sporisorium scitamineum, a Major Disease of Sugarcane: A Contemporary Review. PHYTOPATHOLOGY 2021; 111:1905-1917. [PMID: 34241540 DOI: 10.1094/phyto-05-21-0221-rvw] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Sugarcane smut caused by the fungus Sporisorium scitamineum is one of the major diseases of sugarcane worldwide, causing significant losses in productivity and profitability of this perennial crop. Teliospores of this fungus are airborne, can travel long distances, and remain viable in hot and dry conditions for >6 months. The disease is easily recognized by its long whiplike sorus produced on the apex or side shoots of sugarcane stalks. Each sorus can release ≤100 million teliospores in a day; the spores are small (≤7.5 µ) and light and can survive in harsh environmental conditions. The airborne teliospores are the primary mode of smut spread around the world and across cane-growing regions. The most effective method of managing this disease is via resistant varieties. Because of the complex genomic makeup of sugarcane, selection for resistant traits is difficult in sugarcane breeding programs. In recent times, the application of molecular markers as a rapid tool of discarding susceptible genotypes early in the selection program has been investigated. Large effect resistance loci have been identified and have the potential to be used for marker-assisted selection to increase the frequency of resistant breeding lines in breeding programs. Recent developments in omics technologies (genomics, transcriptomics, proteomics, and metabolomics) have contributed to our understanding and provided insights into the mechanism of resistance and susceptibility. This knowledge will further our understanding of smut and its interactions with sugarcane genotypes and aid in the development of durable resistant varieties.
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Affiliation(s)
- Shamsul A Bhuiyan
- Sugar Research Australia, Woodford, QLD 4514, Australia, and Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia
| | | | - Meredith D McNeil
- CSIRO Agriculture and Food, Queensland Bioscience Precinct, St. Lucia, QLD 4072, Australia
| | - Karen S Aitken
- CSIRO Agriculture and Food, Queensland Bioscience Precinct, St. Lucia, QLD 4072, Australia
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18
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Ruan X, Wang Z, Su Y, Wang T. Population Genomics Reveals Gene Flow and Adaptive Signature in Invasive Weed Mikania micrantha. Genes (Basel) 2021; 12:1279. [PMID: 34440453 PMCID: PMC8394975 DOI: 10.3390/genes12081279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/15/2021] [Accepted: 08/18/2021] [Indexed: 11/28/2022] Open
Abstract
A long-standing and unresolved issue in invasion biology concerns the rapid adaptation of invaders to nonindigenous environments. Mikania micrantha is a notorious invasive weed that causes substantial economic losses and negative ecological consequences in southern China. However, the contributions of gene flow, environmental variables, and functional genes, all generally recognized as important factors driving invasive success, to its successful invasion of southern China are not fully understood. Here, we utilized a genotyping-by-sequencing approach to sequence 306 M. micrantha individuals from 21 invasive populations. Based on the obtained genome-wide single nucleotide polymorphism (SNP) data, we observed that all the populations possessed similar high levels of genetic diversity that were not constrained by longitude and latitude. Mikania micrantha was introduced multiple times and subsequently experienced rapid-range expansion with recurrent high gene flow. Using FST outliers, a latent factor mixed model, and the Bayesian method, we identified 38 outlier SNPs associated with environmental variables. The analysis of these outlier SNPs revealed that soil composition, temperature, precipitation, and ecological variables were important determinants affecting the invasive adaptation of M. micrantha. Candidate genes with outlier signatures were related to abiotic stress response. Gene family clustering analysis revealed 683 gene families unique to M. micrantha which may have significant implications for the growth, metabolism, and defense responses of M. micrantha. Forty-one genes showing significant positive selection signatures were identified. These genes mainly function in binding, DNA replication and repair, signature transduction, transcription, and cellular components. Collectively, these findings highlight the contribution of gene flow to the invasion and spread of M. micrantha and indicate the roles of adaptive loci and functional genes in invasive adaptation.
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Affiliation(s)
- Xiaoxian Ruan
- School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; (X.R.); (Z.W.)
| | - Zhen Wang
- School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; (X.R.); (Z.W.)
| | - Yingjuan Su
- School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; (X.R.); (Z.W.)
- Research Institute of Sun Yat-sen University in Shenzhen, Shenzhen 518057, China
| | - Ting Wang
- College of Life Sciences, South China Agricultural University, Guangzhou 510641, China
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Rody HVS, Camargo LEA, Creste S, Van Sluys MA, Rieseberg LH, Monteiro-Vitorello CB. Arabidopsis-Based Dual-Layered Biological Network Analysis Elucidates Fully Modulated Pathways Related to Sugarcane Resistance on Biotrophic Pathogen Infection. FRONTIERS IN PLANT SCIENCE 2021; 12:707904. [PMID: 34490009 PMCID: PMC8417329 DOI: 10.3389/fpls.2021.707904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
We assembled a dual-layered biological network to study the roles of resistance gene analogs (RGAs) in the resistance of sugarcane to infection by the biotrophic fungus causing smut disease. Based on sugarcane-Arabidopsis orthology, the modeling used metabolic and protein-protein interaction (PPI) data from Arabidopsis thaliana (from Kyoto Encyclopedia of Genes and Genomes (KEGG) and BioGRID databases) and plant resistance curated knowledge for Viridiplantae obtained through text mining of the UniProt/SwissProt database. With the network, we integrated functional annotations and transcriptome data from two sugarcane genotypes that differ significantly in resistance to smut and applied a series of analyses to compare the transcriptomes and understand both signal perception and transduction in plant resistance. We show that the smut-resistant sugarcane has a larger arsenal of RGAs encompassing transcriptionally modulated subnetworks with other resistance elements, reaching hub proteins of primary metabolism. This approach may benefit molecular breeders in search of markers associated with quantitative resistance to diseases in non-model systems.
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Affiliation(s)
- Hugo V. S. Rody
- Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, Brazil
| | - Luis E. A. Camargo
- Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, Brazil
| | | | - Marie-Anne Van Sluys
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil
| | - Loren H. Rieseberg
- Department of Botany, University of British Columbia, Vancouver, BC, Canada
| | - Claudia B. Monteiro-Vitorello
- Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, Brazil
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Umeda M, Sakaigaichi T, Tanaka M, Tarumoto Y, Adachi K, Hattori T, Hayano M, Takahashi H, Tamura Y, Kimura T, Mori M. Detection of a major QTL related to smut disease resistance inherited from a Japanese wild sugarcane using GRAS-Di technology. BREEDING SCIENCE 2021; 71:365-374. [PMID: 34776743 PMCID: PMC8573549 DOI: 10.1270/jsbbs.20137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 02/23/2021] [Indexed: 06/13/2023]
Abstract
Smut disease of sugarcane causes considerable yield losses and the use of resistant varieties is the best control practice. Our group identified a Japanese wild sugarcane with highly smut disease resistance named 'Iriomote8'. In this study, we conducted QTL analysis for smut disease resistance using a mapping population derived from a resistant variety 'Yaenoushie', in which resistance is inherited from 'Iriomote8'. We identified 4813 non-redundant markers using GRAS-Di technology and developed a linkage map of mapping parents. We evaluated smut disease resistance of the mapping population by the inoculation test. Consequently, a large number of clones did not show the disease symptoms and the distribution of smut disease incidence tended to be "L shaped". Composite interval mapping detected an identical QTL for indices of smut disease incidence with a markedly high LOD score (26.6~45.6) at the end of linkage group 8 of 'Yaenoushie'. This QTL explained approximately 50% of the cases of smut disease incidence. In the mapping population, there were no correlations between the indices of smut disease incidence and other agronomic traits. In conclusion, this QTL could be used for marker-assisted selection to significantly improve smut disease resistance without negative effects on other agronomic traits.
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Affiliation(s)
- Makoto Umeda
- NARO Kyushu Okinawa Agricultural Research Center, Tanegashima Sugarcane Breeding Site, 1742-1 Anno, Nishinoomote, Kagoshima 891-3102, Japan
| | - Takeo Sakaigaichi
- NARO Kyushu Okinawa Agricultural Research Center, Tanegashima Sugarcane Breeding Site, 1742-1 Anno, Nishinoomote, Kagoshima 891-3102, Japan
- NARO Kyushu Okinawa Agricultural Research Center, Miyakonojo Research Station, 6651-2 Yokoichi-cho, Miyakonojo, Miyazaki 885-0091, Japan
| | - Minoru Tanaka
- NARO Kyushu Okinawa Agricultural Research Center, Tanegashima Sugarcane Breeding Site, 1742-1 Anno, Nishinoomote, Kagoshima 891-3102, Japan
- NARO Central Region Agricultural Research Center, Tsukuba Headquarters, 2-1-18 Kannondai, Tsukuba, Ibaraki 305-8666, Japan
| | - Yusuke Tarumoto
- NARO Kyushu Okinawa Agricultural Research Center, Tanegashima Sugarcane Breeding Site, 1742-1 Anno, Nishinoomote, Kagoshima 891-3102, Japan
| | - Katsuki Adachi
- NARO Kyushu Okinawa Agricultural Research Center, Tanegashima Sugarcane Breeding Site, 1742-1 Anno, Nishinoomote, Kagoshima 891-3102, Japan
- Kubota Corporation, Agri-Solution Department, 1-2-47 Shikitsuhigashi, Naniwa-ku, Osaka 556-8601, Japan
| | - Taiichiro Hattori
- NARO Kyushu Okinawa Agricultural Research Center, Tanegashima Sugarcane Breeding Site, 1742-1 Anno, Nishinoomote, Kagoshima 891-3102, Japan
- NARO Kyushu Okinawa Agricultural Research Center, Headquarters, 2421 Suya, Koshi, Kumamoto 861-1192, Japan
| | - Michiko Hayano
- NARO Kyushu Okinawa Agricultural Research Center, Tanegashima Sugarcane Breeding Site, 1742-1 Anno, Nishinoomote, Kagoshima 891-3102, Japan
- NARO Institute for Agro-Environmental Science, 3-1-3 Kannondai, Tsukuba, Ibaraki 305-8604, Japan
| | - Hiroyuki Takahashi
- NARO Kyushu Okinawa Agricultural Research Center, Tanegashima Sugarcane Breeding Site, 1742-1 Anno, Nishinoomote, Kagoshima 891-3102, Japan
| | - Yasuaki Tamura
- NARO Kyushu Okinawa Agricultural Research Center, Tanegashima Sugarcane Breeding Site, 1742-1 Anno, Nishinoomote, Kagoshima 891-3102, Japan
| | - Tatsuro Kimura
- Toyota Motor Corporation, Agriculture & Biotechnology Business Division, 1 Toyota-cho, Toyota, Aichi 471-8571, Japan
| | - Masaaki Mori
- Toyota Motor Corporation, Environmental Affairs Division, 1-4-18 Koraku, Bunkyo-ku, Tokyo 112-8701, Japan
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Leaping into the Unknown World of Sporisorium scitamineum Candidate Effectors. J Fungi (Basel) 2020; 6:jof6040339. [PMID: 33291820 PMCID: PMC7762069 DOI: 10.3390/jof6040339] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/28/2020] [Accepted: 11/30/2020] [Indexed: 11/17/2022] Open
Abstract
Sporisorium scitamineum is a biotrophic fungus causing sugarcane smut disease. In this study, we set up a pipeline and used genomic and dual transcriptomic data previously obtained by our group to identify candidate effectors of S. scitamineum and their expression profiles in infected smut-resistant and susceptible sugarcane plants. The expression profile of different genes after infection in contrasting sugarcane genotypes assessed by RT-qPCR depended on the plant genotypes and disease progression. Three candidate effector genes expressed earlier only in resistant plants, four expressed in both genotypes, and three later in susceptible plants. Ten genes were cloned and transiently expressed in N. benthamiana leaves to determine their subcellular location, while four localized in more than one compartment. Two candidates, g3890 having a nucleoplasmic and mitochondrial location and g5159 targeting the plant cell wall, were selected to obtain their possible corresponding host targets using co-immunoprecipitation (CoIP) experiments and mass spectrometry. Various potential interactors were identified, including subunits of the protein phosphatase 2A and an endochitinase. We investigated the presence of orthologs in sugarcane and using transcriptome data present their expression profiles. Orthologs of sugarcane shared around 70% similarity. Identifying a set of putative fungal effectors and their plant targets provides a valuable resource for functional characterization of the molecular events leading to smut resistance in sugarcane plants and uncovers further opportunities for investigation.
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The Versatile Roles of Sulfur-Containing Biomolecules in Plant Defense-A Road to Disease Resistance. PLANTS 2020; 9:plants9121705. [PMID: 33287437 PMCID: PMC7761819 DOI: 10.3390/plants9121705] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/23/2020] [Accepted: 12/02/2020] [Indexed: 01/03/2023]
Abstract
Sulfur (S) is an essential plant macronutrient and the pivotal role of sulfur compounds in plant disease resistance has become obvious in recent decades. This review attempts to recapitulate results on the various functions of sulfur-containing defense compounds (SDCs) in plant defense responses to pathogens. These compounds include sulfur containing amino acids such as cysteine and methionine, the tripeptide glutathione, thionins and defensins, glucosinolates and phytoalexins and, last but not least, reactive sulfur species and hydrogen sulfide. SDCs play versatile roles both in pathogen perception and initiating signal transduction pathways that are interconnected with various defense processes regulated by plant hormones (salicylic acid, jasmonic acid and ethylene) and reactive oxygen species (ROS). Importantly, ROS-mediated reversible oxidation of cysteine residues on plant proteins have profound effects on protein functions like signal transduction of plant defense responses during pathogen infections. Indeed, the multifaceted plant defense responses initiated by SDCs should provide novel tools for plant breeding to endow crops with efficient defense responses to invading pathogens.
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Li Q, Qin X, Qi J, Dou W, Dunand C, Chen S, He Y. CsPrx25, a class III peroxidase in Citrus sinensis, confers resistance to citrus bacterial canker through the maintenance of ROS homeostasis and cell wall lignification. HORTICULTURE RESEARCH 2020; 7:192. [PMID: 33328465 PMCID: PMC7705758 DOI: 10.1038/s41438-020-00415-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 09/02/2020] [Accepted: 09/04/2020] [Indexed: 05/21/2023]
Abstract
Citrus bacterial canker (CBC) results from Xanthomonas citri subsp. citri (Xcc) infection and poses a grave threat to citrus production. Class III peroxidases (CIII Prxs) are key proteins to the environmental adaptation of citrus plants to a range of exogenous pathogens, but the role of CIII Prxs during plant resistance to CBC is poorly defined. Herein, we explored the role of CsPrx25 and its contribution to plant defenses in molecular detail. Based on the expression analysis, CsPrx25 was identified as an apoplast-localized protein that is differentially regulated by Xcc infection, salicylic acid, and methyl jasmone acid in the CBC-susceptible variety Wanjincheng (C. sinensis) and the CBC-resistant variety Calamondin (C. madurensis). Transgenic Wanjincheng plants overexpressing CsPrx25 were generated, and these transgenic plants exhibited significantly increased CBC resistance compared with the WT plants. In addition, the CsPrx25-overexpressing plants displayed altered reactive oxygen species (ROS) homeostasis accompanied by enhanced H2O2 levels, which led to stronger hypersensitivity responses during Xcc infection. Moreover, the overexpression of CsPrx25 enhanced lignification as an apoplastic barrier for Xcc infection. Taken together, the results highlight how CsPrx25-mediated ROS homeostasis reconstruction and cell wall lignification can enhance the resistance of sweet orange to CBC.
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Affiliation(s)
- Qiang Li
- Citrus Research Institute, Southwest University/Chinese Academy of Agricultural Sciences, Chongqing, 400712, China
| | - Xiujuan Qin
- Citrus Research Institute, Southwest University/Chinese Academy of Agricultural Sciences, Chongqing, 400712, China
| | - Jingjing Qi
- Citrus Research Institute, Southwest University/Chinese Academy of Agricultural Sciences, Chongqing, 400712, China
| | - Wanfu Dou
- Citrus Research Institute, Southwest University/Chinese Academy of Agricultural Sciences, Chongqing, 400712, China
| | - Christophe Dunand
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, Auzeville-Tolosane, 31320, France
| | - Shanchun Chen
- Citrus Research Institute, Southwest University/Chinese Academy of Agricultural Sciences, Chongqing, 400712, China.
| | - Yongrui He
- Citrus Research Institute, Southwest University/Chinese Academy of Agricultural Sciences, Chongqing, 400712, China.
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, 401331, Chongqing, China.
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Differential responses of genes and enzymes associated with ROS protective responses in the sugarcane smut fungus. Fungal Biol 2020; 124:1039-1051. [PMID: 33213784 DOI: 10.1016/j.funbio.2020.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 09/09/2020] [Accepted: 09/23/2020] [Indexed: 12/29/2022]
Abstract
The fungal pathogen Sporisorium scitamineum causes sugarcane smut disease. We have previously shown that resistant sugarcane plants induce ROS, coinciding with a delay in fungal colonization. Here, we investigated whether the fungus modifies the enzymatic antioxidant system in vitro and when colonizing sugarcane tissues in response to ROS. In vitro, the exposure to ROS did not affect cell integrity, and a combination of superoxide dismutases (SOD) and catalases (CAT) were active. In vitro, the fungus did not alter the expression of the transcriptional regulator Yap1 and the effector Pep1. The fungus activated distinct enzymes when colonizing plant tissues. Instead of CAT, S. scitamineum induced glutathione peroxidase (Gpx) expression only when colonizing smut-resistant plants. Yap1 had an earlier expression in both smut-susceptible and -resistant plants, with no apparent correlation with the expression of antioxidant genes sod, cat, gpx, or external redox imbalance. The expression of the effector pep1 was induced only in smut-resistant plants, potentially in response to ROS. These results collectively suggest that S. scitamineum copes with oxidative stress by inducing different mechanisms depending on the conditions (in vitro/in planta) and intensity of ROS. Moreover, the effector Pep1 is responsive to the stress imposed only by the sugarcane resistant genotype.
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25
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Correr FH, Hosaka GK, Gómez SGP, Cia MC, Vitorello CBM, Camargo LEA, Massola NS, Carneiro MS, Margarido GRA. Time-series expression profiling of sugarcane leaves infected with Puccinia kuehnii reveals an ineffective defense system leading to susceptibility. PLANT CELL REPORTS 2020; 39:873-889. [PMID: 32314046 DOI: 10.1007/s00299-020-02536-w] [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: 12/20/2019] [Accepted: 03/30/2020] [Indexed: 05/02/2023]
Abstract
Successful orange rust development on sugarcane can potentially be explained as suppression of the plant immune system by the pathogen or delayed plant signaling to trigger defense responses. Puccinia kuehnii is an obligate biotrophic fungus that infects sugarcane leaves causing a disease called orange rust. It spread out to other countries resulting in reduction of crop yield since its first outbreak. One of the knowledge gaps of that pathosystem is to understand the molecular mechanisms altered in susceptible plants by this biotic stress. Here, we investigated the changes in temporal expression of transcripts in pathways associated with the immune system. To achieve this purpose, we used RNA-Seq to analyze infected leaf samples collected at five time points after inoculation. Differential expression analyses of adjacent time points revealed substantial changes at 12, 48 h after inoculation and 12 days after inoculation, coinciding with the events of spore germination, haustoria post-penetration and post-sporulation, respectively. During the first 24 h, a lack of transcripts involved with resistance mechanisms was revealed by underrepresentation of hypersensitive and defense response related genes. However, two days after inoculation, upregulation of genes involved with immune response regulation provided evidence of some potential defense response. Events related to biotic stress responses were predominantly downregulated in the initial time points, but expression was later restored to basal levels. Genes involved in carbohydrate metabolism showed evidence of repression followed by upregulation, possibly to ensure the pathogen nutritional requirements were met. Our results support the hypothesis that P. kuehnii initially suppressed sugarcane genes involved in plant defense systems. Late overexpression of specific regulatory pathways also suggests the possibility of an inefficient recognition system by a susceptible sugarcane genotype.
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Affiliation(s)
- Fernando Henrique Correr
- Departamento de Genética, Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ), Piracicaba, São Paulo, Brazil
| | - Guilherme Kenichi Hosaka
- Departamento de Genética, Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ), Piracicaba, São Paulo, Brazil
| | - Sergio Gregorio Pérez Gómez
- Departamento de Fitopatologia, Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ), Piracicaba, São Paulo, Brazil
| | - Mariana Cicarelli Cia
- Departamento de Fitopatologia, Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ), Piracicaba, São Paulo, Brazil
| | - Claudia Barros Monteiro Vitorello
- Departamento de Genética, Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ), Piracicaba, São Paulo, Brazil
| | - Luis Eduardo Aranha Camargo
- Departamento de Fitopatologia, Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ), Piracicaba, São Paulo, Brazil
| | - Nelson Sidnei Massola
- Departamento de Fitopatologia, Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ), Piracicaba, São Paulo, Brazil
| | - Monalisa Sampaio Carneiro
- Departamento de Biotecnologia e Produção Vegetal e Animal, Universidade Federal de São Carlos, Centro de Ciências Agrárias, Araras, São Paulo, Brazil
| | - Gabriel Rodrigues Alves Margarido
- Departamento de Genética, Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ), Piracicaba, São Paulo, Brazil.
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García-Ulloa A, Sanjurjo L, Cimini S, Encina A, Martínez-Rubio R, Bouza R, Barral L, Estévez-Pérez G, Novo-Uzal E, De Gara L, Pomar F. Overexpression of ZePrx in Nicotiana tabacum Affects Lignin Biosynthesis Without Altering Redox Homeostasis. FRONTIERS IN PLANT SCIENCE 2020; 11:900. [PMID: 32676088 PMCID: PMC7333733 DOI: 10.3389/fpls.2020.00900] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/02/2020] [Indexed: 05/30/2023]
Abstract
Class III plant peroxidases (Prxs) are involved in the oxidative polymerization of lignins. Zinnia elegans Jacq. Basic peroxidase (ZePrx) has been previously characterized as capable of catalyzing this reaction in vitro and the role in lignin biosynthesis of several of its Arabidopsis thaliana homologous has been previously confirmed. In the present work, ZePrx was overexpressed in Nicotiana tabacum to further characterize its function in planta with particular attention to its involvement in lignin biosynthesis. Since Prxs are known to alter ROS levels by using them as electron acceptor or producing them in their catalytic activity, the impact of this overexpression in redox homeostasis was studied by analyzing the metabolites and enzymes of the ascorbate-glutathione cycle. In relation to the modification induced by ZePrx overexpression in lignin composition and cellular metabolism, the carbohydrate composition of the cell wall as well as overall gene expression through RNA-Seq were analyzed. The obtained results indicate that the overexpression of ZePrx caused an increase in syringyl lignin in cell wall stems, suggesting that ZePrx is relevant for the oxidation of sinapyl alcohol during lignin biosynthesis, coherently with its S-peroxidase nature. The increase in the glucose content of the cell wall and the reduction of the expression of several genes involved in secondary cell wall biosynthesis suggests the occurrence of a possible compensatory response to maintain cell wall properties. The perturbation of cellular redox homeostasis occurring as a consequence of ZePrx overexpression was kept under control by an increase in APX activity and a reduction in ascorbate redox state. In conclusion, our results confirm the role of ZePrx in lignin biosynthesis and highlight that its activity alters cellular pathways putatively aimed at maintaining redox homeostasis.
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Affiliation(s)
- Alba García-Ulloa
- Departamento de Biología, Centro de Investigaciones Científicas Avanzadas, Universidade da Coruña, A Coruña, Spain
| | - Laura Sanjurjo
- Departamento de Biología, Centro de Investigaciones Científicas Avanzadas, Universidade da Coruña, A Coruña, Spain
| | - Sara Cimini
- Unit of Food Science and Human Nutrition, Department of Science and Technology for Humans and the Environment, Campus Bio-Medico University, Rome, Italy
| | - Antonio Encina
- Área de Fisiología Vegetal, Departamento de Ingeniería y Ciencias Agrarias, Universidad de León, León, Spain
| | - Romina Martínez-Rubio
- Área de Fisiología Vegetal, Departamento de Ingeniería y Ciencias Agrarias, Universidad de León, León, Spain
| | - Rebeca Bouza
- Grupo de Polímeros, Departamento de Física y Ciencias de la Tierra Escuela Universitaria Politécnica, Universidade da Coruña, Serantes, Ferrol, Spain
| | - Luis Barral
- Grupo de Polímeros, Departamento de Física y Ciencias de la Tierra Escuela Universitaria Politécnica, Universidade da Coruña, Serantes, Ferrol, Spain
| | | | | | - Laura De Gara
- Unit of Food Science and Human Nutrition, Department of Science and Technology for Humans and the Environment, Campus Bio-Medico University, Rome, Italy
| | - Federico Pomar
- Departamento de Biología, Centro de Investigaciones Científicas Avanzadas, Universidade da Coruña, A Coruña, Spain
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Ntambo MS, Meng JY, Rott PC, Henry RJ, Zhang HL, Gao SJ. Comparative Transcriptome Profiling of Resistant and Susceptible Sugarcane Cultivars in Response to Infection by Xanthomonas albilineans. Int J Mol Sci 2019; 20:ijms20246138. [PMID: 31817492 PMCID: PMC6940782 DOI: 10.3390/ijms20246138] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/26/2019] [Accepted: 12/03/2019] [Indexed: 12/20/2022] Open
Abstract
Sugarcane (Saccharum spp. hybrids) is a major source of sugar and renewable bioenergy crop worldwide and suffers serious yield losses due to many pathogen infections. Leaf scald caused by Xanthomonas albilineans is a major bacterial disease of sugarcane in most sugarcane-planting countries. The molecular mechanisms of resistance to leaf scald in this plant are, however, still unclear. We performed a comparative transcriptome analysis between resistant (LCP 85-384) and susceptible (ROC20) sugarcane cultivars infected by X. albilineans using the RNA-seq platform. 24 cDNA libraries were generated with RNA isolated at four time points (0, 24, 48, and 72 h post inoculation) from the two cultivars with three biological replicates. A total of 105,783 differentially expressed genes (DEGs) were identified in both cultivars and the most upregulated and downregulated DEGs were annotated for the processes of the metabolic and single-organism categories, respectively. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis of the 7612 DEGs showed that plant-pathogen interaction, spliceosome, glutathione metabolism, protein processing in endoplasmic reticulum, and plant hormone signal transduction contributed to sugarcane's response to X. albilineans infection. Subsequently, relative expression levels of ten DEGs determined by quantitative reverse transcription-PCR (qRT-PCR), in addition to RNA-Seq data, indicated that different plant hormone (auxin and ethylene) signal transduction pathways play essential roles in sugarcane infected by X. albilineans. In conclusion, our results provide, for the first time, valuable information regarding the transcriptome changes in sugarcane in response to infection by X. albilineans, which contribute to the understanding of the molecular mechanisms underlying the interactions between sugarcane and this pathogen and provide important clues for further characterization of leaf scald resistance in sugarcane.
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Affiliation(s)
- Mbuya Sylvain Ntambo
- National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.S.N.); (H.-L.Z.)
| | - Jian-Yu Meng
- National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.S.N.); (H.-L.Z.)
| | - Philippe C. Rott
- BGPI, INRA, CIRAD, SupAgro, Univ Montpellier, 34398 Montpellier, France;
| | - Robert J. Henry
- Centre for Crop Science, Queensland Alliance for Agriculture and Food Innovation, University of Queensland, Brisbane, QLD 4072, Australia;
| | - Hui-Li Zhang
- National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.S.N.); (H.-L.Z.)
| | - San-Ji Gao
- National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.S.N.); (H.-L.Z.)
- Correspondence:
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Rody HVS, Bombardelli RGH, Creste S, Camargo LEA, Van Sluys MA, Monteiro-Vitorello CB. Genome survey of resistance gene analogs in sugarcane: genomic features and differential expression of the innate immune system from a smut-resistant genotype. BMC Genomics 2019; 20:809. [PMID: 31694536 PMCID: PMC6836459 DOI: 10.1186/s12864-019-6207-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Accepted: 10/21/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Resistance genes composing the two-layer immune system of plants are thought as important markers for breeding pathogen-resistant crops. Many have been the attempts to establish relationships between the genomic content of Resistance Gene Analogs (RGAs) of modern sugarcane cultivars to its degrees of resistance to diseases such as smut. However, due to the highly polyploid and heterozygous nature of sugarcane genome, large scale RGA predictions is challenging. RESULTS We predicted, searched for orthologs, and investigated the genomic features of RGAs within a recently released sugarcane elite cultivar genome, alongside the genomes of sorghum, one sugarcane ancestor (Saccharum spontaneum), and a collection of de novo transcripts generated for six modern cultivars. In addition, transcriptomes from two sugarcane genotypes were obtained to investigate the roles of RGAs differentially expressed (RGADE) in their distinct degrees of resistance to smut. Sugarcane references lack RGAs from the TNL class (Toll-Interleukin receptor (TIR) domain associated to nucleotide-binding site (NBS) and leucine-rich repeat (LRR) domains) and harbor elevated content of membrane-associated RGAs. Up to 39% of RGAs were organized in clusters, and 40% of those clusters shared synteny. Basically, 79% of predicted NBS-encoding genes are located in a few chromosomes. S. spontaneum chromosome 5 harbors most RGADE orthologs responsive to smut in modern sugarcane. Resistant sugarcane had an increased number of RGAs differentially expressed from both classes of RLK (receptor-like kinase) and RLP (receptor-like protein) as compared to the smut-susceptible. Tandem duplications have largely contributed to the expansion of both RGA clusters and the predicted clades of RGADEs. CONCLUSIONS Most of smut-responsive RGAs in modern sugarcane were potentially originated in chromosome 5 of the ancestral S. spontaneum genotype. Smut resistant and susceptible genotypes of sugarcane have a distinct pattern of RGADE. TM-LRR (transmembrane domains followed by LRR) family was the most responsive to the early moment of pathogen infection in the resistant genotype, suggesting the relevance of an innate immune system. This work can help to outline strategies for further understanding of allele and paralog expression of RGAs in sugarcane, and the results should help to develop a more applied procedure for the selection of resistant plants in sugarcane.
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Affiliation(s)
- Hugo V S Rody
- Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Genética, Universidade de São Paulo, Piracicaba, São Paulo, Brazil
| | - Renato G H Bombardelli
- Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Genética, Universidade de São Paulo, Piracicaba, São Paulo, Brazil
| | - Silvana Creste
- Centro de Cana, IAC-Apta, Ribeirão Preto, Av. Pádua Dias n11, CEP 13418-900, Piracicaba, São Paulo, Brazil
| | - Luís E A Camargo
- Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Genética, Universidade de São Paulo, Piracicaba, São Paulo, Brazil
| | - Marie-Anne Van Sluys
- Departamento de Botânia, Universidade de São Paulo, Instituto de Biociências, São Paulo, Brazil
| | - Claudia B Monteiro-Vitorello
- Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Genética, Universidade de São Paulo, Piracicaba, São Paulo, Brazil.
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Bedre R, Irigoyen S, Schaker PDC, Monteiro-Vitorello CB, Da Silva JA, Mandadi KK. Genome-wide alternative splicing landscapes modulated by biotrophic sugarcane smut pathogen. Sci Rep 2019; 9:8876. [PMID: 31222001 PMCID: PMC6586842 DOI: 10.1038/s41598-019-45184-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 05/22/2019] [Indexed: 12/24/2022] Open
Abstract
Alternative splicing (AS) promotes transcriptome and proteome diversity during growth, development, and stress responses in eukaryotes. Genome-wide studies of AS in sugarcane (Saccharum spp.) are lacking, mainly due to the absence of a high-quality sequenced reference genome, sugarcane's large, complex genome, and the variable chromosome numbers and polyploidy of sugarcane cultivars. Here, we analyzed changes in the sugarcane isoform-level transcriptome and AS landscape during infection with the smut fungus (Sporisorium scitamineum) using a hybrid approach involving Sorghum bicolor reference-based and Trinity de novo mapping tools. In total, this analysis detected 16,039 and 15,379 transcripts (≥2 FPKM) at 5 and 200 days after infection, respectively. A conservative estimate of isoform-level expression suggested that approximately 5,000 (14%) sugarcane genes undergo AS. Differential expression analysis of the alternatively spliced genes in healthy and smut-infected sugarcane revealed 896 AS events modulated at different stages of infection. Gene family and gene ontology functional enrichment analysis of the differentially spliced genes revealed overrepresentation of functional categories related to the cell wall, defense, and redox homeostasis pathways. Our study provides novel insight into the AS landscape of sugarcane during smut disease interactions.
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Affiliation(s)
- Renesh Bedre
- Texas A&M AgriLife Research & Extension Center, Texas A&M University, Weslaco, TX, USA
| | - Sonia Irigoyen
- Texas A&M AgriLife Research & Extension Center, Texas A&M University, Weslaco, TX, USA
| | - Patricia D C Schaker
- Departamento de Genética, Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz," Piracicaba, São Paulo, Brazil
- Universidade Tecnológica Federal do Paraná, Toledo, Paraná, Brazil
| | - Claudia B Monteiro-Vitorello
- Departamento de Genética, Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz," Piracicaba, São Paulo, Brazil
| | - Jorge A Da Silva
- Texas A&M AgriLife Research & Extension Center, Texas A&M University, Weslaco, TX, USA
- Department of Soil & Crop Sciences, Texas A&M University, College Station, TX, USA
| | - Kranthi K Mandadi
- Texas A&M AgriLife Research & Extension Center, Texas A&M University, Weslaco, TX, USA.
- Department of Plant Pathology & Microbiology, Texas A&M University, College Station, TX, USA.
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Analysis of the resistance mechanisms in sugarcane during Sporisorium scitamineum infection using RNA-seq and microscopy. PLoS One 2018; 13:e0197840. [PMID: 29795614 PMCID: PMC5993111 DOI: 10.1371/journal.pone.0197840] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 05/09/2018] [Indexed: 02/03/2023] Open
Abstract
Smut caused by biotrophic fungus Sporisorium scitamineum is a major disease of cultivated sugarcane that can cause considerable yield losses. It has been suggested in literature that there are at least two types of resistance mechanisms in sugarcane plants: an external resistance, due to chemical or physical barriers in the sugarcane bud, and an internal resistance governed by the interaction of plant and fungus within the plant tissue. Detailed molecular studies interrogating these two different resistance mechanisms in sugarcane are scarce. Here, we use light microscopy and global expression profiling with RNA-seq to investigate these mechanisms in sugarcane cultivar CP74-2005, a cultivar that possibly possesses both internal and external defence mechanisms. A total of 861 differentially expressed genes (DEGs) were identified in a comparison between infected and non-infected buds at 48 hours post-inoculation (hpi), with 457 (53%) genes successfully annotated using BLAST2GO software. This includes genes involved in the phenylpropanoid pathway, cell wall biosynthesis, plant hormone signal transduction and disease resistance genes. Finally, the expression of 13 DEGs with putative roles in S. scitamineum resistance were confirmed by quantitative real-time reverse transcription PCR (qRT-PCR) analysis, and the results were consistent with the RNA-seq data. These results highlight that the early sugarcane response to S. scitamineum infection is complex and many of the disease response genes are attenuated in sugarcane cultivar CP74-2005, while others, like genes involved in the phenylpropanoid pathway, are induced. This may point to the role of the different disease resistance mechanisms that operate in cultivars such as CP74-2005, whereby the early response is dominated by external mechanisms and then as the infection progresses, the internal mechanisms are switched on. Identification of genes underlying resistance in sugarcane will increase our knowledge of the sugarcane-S. scitamineum interaction and facilitate the introgression of new resistance genes into commercial sugarcane cultivars.
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Dobrzanski T, Gravina F, Steckling B, Olchanheski LR, Sprenger RF, Espírito Santo BC, Galvão CW, Reche PM, Prestes RA, Pileggi SAV, Campos FR, Azevedo RA, Sadowsky MJ, Beltrame FL, Pileggi M. Bacillus megaterium strains derived from water and soil exhibit differential responses to the herbicide mesotrione. PLoS One 2018; 13:e0196166. [PMID: 29694403 PMCID: PMC5918998 DOI: 10.1371/journal.pone.0196166] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 04/06/2018] [Indexed: 02/07/2023] Open
Abstract
The intense use of herbicides for weed control in agriculture causes selection pressure on soil microbiota and water ecosystems, possibly resulting in changes to microbial processes, such as biogeochemical cycles. These xenobiotics may increase the production of reactive oxygen species and consequently affect the survival of microorganisms, which need to develop strategies to adapt to these conditions and maintain their ecological functionality. This study analyzed the adaptive responses of bacterial isolates belonging to the same species, originating from two different environments (water and soil), and subjected to selection pressure by herbicides. The effects of herbicide Callisto and its active ingredient, mesotrione, induced different adaptation strategies on the cellular, enzymatic, and structural systems of two Bacillus megaterium isolates obtained from these environments. The lipid saturation patterns observed may have affected membrane permeability in response to this herbicide. Moreover, this may have led to different levels of responses involving superoxide dismutase and catalase activities, and enzyme polymorphisms. Due to these response systems, the strain isolated from water exhibited higher growth rates than did the soil strain, in evaluations made in oligotrophic culture media, which would be more like that found in semi-pristine aquatic environments. The influence of the intracellular oxidizing environments, which changed the mode of degradation of mesotrione in our experimental model and produced different metabolites, can also be observed in soil and water at sites related to agriculture. Since the different metabolites may present different levels of toxicity, we suggest that this fact should be considered in studies on the fate of agrochemicals in different environments.
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Affiliation(s)
- Tatiane Dobrzanski
- Laboratório de Microbiologia Ambiental, Setor de Ciências Biológicas e da Saúde, Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Fernanda Gravina
- Laboratório de Microbiologia Ambiental, Setor de Ciências Biológicas e da Saúde, Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Bruna Steckling
- Laboratório de Microbiologia Ambiental, Setor de Ciências Biológicas e da Saúde, Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Luiz R. Olchanheski
- Laboratório de Biologia Molecular e Ecologia Microbiana, Instituto de Ciências Biomédicas, Departamento de Microbiologia, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Ricardo F. Sprenger
- Separare - Núcleo de Cromatografia, Departamento de Química, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
| | - Bruno C. Espírito Santo
- Laboratório de Biotecnologia Microbiana, Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | - Carolina W. Galvão
- Laboratório de Biologia Molecular Microbiana, Setor de Ciências Biológicas e da Saúde, Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Péricles M. Reche
- Laboratório de Pesquisa em Recursos Hídricos, Setor de Ciências Biológicas e da Saúde, Departamento de Enfermagem e Saúde Pública, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Rosilene A. Prestes
- Departamento Acadêmico, Campus Ponta Grossa, Universidade Tecnológica Federal do Paraná, UTFPR, Campus Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Sônia A. V. Pileggi
- Laboratório de Microbiologia Ambiental, Setor de Ciências Biológicas e da Saúde, Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Francinete R. Campos
- Laboratório de Biociências e Espectrometria de Massas, Departamento de Farmácia, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
| | - Ricardo A. Azevedo
- Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, São Paulo, Brazil
| | - Michael J. Sadowsky
- Department of Soil, Water, and Climate, and The Biotechnology Institute, University of Minnesota, Saint Paul, Minnesota, United States of America
| | - Flávio L. Beltrame
- Laboratório de Fitoterapia, Tecnologia e Química de Produtos Naturais, Departamento de Ciências Farmacêuticas, Setor de Ciências Biológicas e da Saúde, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Marcos Pileggi
- Laboratório de Microbiologia Ambiental, Setor de Ciências Biológicas e da Saúde, Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brazil
- * E-mail:
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Schaker PDC, Peters LP, Cataldi TR, Labate CA, Caldana C, Monteiro-Vitorello CB. Metabolome Dynamics of Smutted Sugarcane Reveals Mechanisms Involved in Disease Progression and Whip Emission. FRONTIERS IN PLANT SCIENCE 2017; 8:882. [PMID: 28620397 PMCID: PMC5450380 DOI: 10.3389/fpls.2017.00882] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 05/10/2017] [Indexed: 05/02/2023]
Abstract
Sugarcane smut disease, caused by the biotrophic fungus Sporisorium scitamineum, is characterized by the development of a whip-like structure from the plant meristem. The disease causes negative effects on sucrose accumulation, fiber content and juice quality. The aim of this study was to exam whether the transcriptomic changes already described during the infection of sugarcane by S. scitamineum result in changes at the metabolomic level. To address this question, an analysis was conducted during the initial stage of the interaction and through disease progression in a susceptible sugarcane genotype. GC-TOF-MS allowed the identification of 73 primary metabolites. A set of these compounds was quantitatively altered at each analyzed point as compared with healthy plants. The results revealed that energetic pathways and amino acid pools were affected throughout the interaction. Raffinose levels increased shortly after infection but decreased remarkably after whip emission. Changes related to cell wall biosynthesis were characteristic of disease progression and suggested a loosening of its structure to allow whip growth. Lignin biosynthesis related to whip formation may rely on Tyr metabolism through the overexpression of a bifunctional PTAL. The altered levels of Met residues along with overexpression of SAM synthetase and ACC synthase genes suggested a role for ethylene in whip emission. Moreover, unique secondary metabolites antifungal-related were identified using LC-ESI-MS approach, which may have potential biomarker applications. Lastly, a putative toxin was the most important fungal metabolite identified whose role during infection remains to be established.
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Affiliation(s)
- Patricia D. C. Schaker
- Department of Genetics, “Luiz de Queiroz”' College of Agriculture, University of São PauloSão Paulo, Brazil
| | - Leila P. Peters
- Department of Genetics, “Luiz de Queiroz”' College of Agriculture, University of São PauloSão Paulo, Brazil
| | - Thais R. Cataldi
- Department of Genetics, “Luiz de Queiroz”' College of Agriculture, University of São PauloSão Paulo, Brazil
| | - Carlos A. Labate
- Department of Genetics, “Luiz de Queiroz”' College of Agriculture, University of São PauloSão Paulo, Brazil
| | - Camila Caldana
- Brazilian Bioethanol Science and Technology LaboratorySão Paulo, Brazil
- Max Planck Partner Group at Brazilian Bioethanol Science and Technology LaboratorySão Paulo, Brazil
| | - Claudia B. Monteiro-Vitorello
- Department of Genetics, “Luiz de Queiroz”' College of Agriculture, University of São PauloSão Paulo, Brazil
- *Correspondence: Claudia B. Monteiro-Vitorello
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