1
|
Sáez C, Kheireddine A, García A, Sifres A, Moreno A, Font-San-Ambrosio MI, Picó B, López C. Further Molecular Diagnosis Determines Lack of Evidence for Real Seed Transmission of Tomato Leaf Curl New Delhi Virus in Cucurbits. PLANTS (BASEL, SWITZERLAND) 2023; 12:3773. [PMID: 37960129 PMCID: PMC10650430 DOI: 10.3390/plants12213773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/26/2023] [Accepted: 11/02/2023] [Indexed: 11/15/2023]
Abstract
Begomoviruses (family Geminiviridae) cause serious diseases in many crop families. Since 2013, the Spanish isolate of tomato leaf curl New Delhi virus (ToLCNDV) has been a limiting factor for cucurbits production in the Mediterranean basin, forcing farmers to adapt new management and control techniques. Although it is well-known that begomoviruses are naturally transmitted by the whitefly Bemisia tabaci, the capacity of these viruses to be vertically transmitted through seeds remains controversial. Clarifying the potential ToLCNDV seed transmission is essential to understand the epidemiology of this threating-for-cucurbits virus and to design appropriate control strategies. We assessed ToLCNDV distribution in the leaves, flowers and seeds of the infected plants of susceptible Cucumis melo accessions and toleration to the infected genotypes of Cucurbita moschata by conventional and quantitative PCR. We analyzed whether the viral particle was transmitted to offspring. We also evaluated ToLCNDV presence in commercial seeds of cucurbits (zucchini (Cucurbita pepo), melon (C. melo), cucumber (Cucumis sativus) and watermelon (Citrullus lanatus)) and in their progenies. As the assayed seedlings remained symptomless, we increased the reliability and accuracy of detection in these samples by searching for replicative forms of ToLCNDV by combining Southern blot hybridization and rolling-circle amplification (RCA). However, integral genomic DNA was not identified in the plants of offspring. Although the seedborne nature of ToLCNDV was confirmed, our results do not support the transmission of this virus from contaminated seeds to progeny.
Collapse
Affiliation(s)
- Cristina Sáez
- Institute for the Conservation and Breeding of Valencian Agro-Diversity, Universitat Politècnica de València (COMAV-UPV), Camino de Vera s/n, 46022 Valencia, Spain; (A.K.); (A.S.); (B.P.)
- Centro de Biotecnología y Genómica de Plantas UPM-INIA and E.T.S. Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, 28031 Madrid, Spain
| | - Amina Kheireddine
- Institute for the Conservation and Breeding of Valencian Agro-Diversity, Universitat Politècnica de València (COMAV-UPV), Camino de Vera s/n, 46022 Valencia, Spain; (A.K.); (A.S.); (B.P.)
| | - Arcadio García
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas—Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain;
| | - Alicia Sifres
- Institute for the Conservation and Breeding of Valencian Agro-Diversity, Universitat Politècnica de València (COMAV-UPV), Camino de Vera s/n, 46022 Valencia, Spain; (A.K.); (A.S.); (B.P.)
| | | | - María Isabel Font-San-Ambrosio
- Instituto Agroforestal Mediterráneo, Universitat Politècnica de València (IAM-UPV), Camino de Vera s/n, 46022 Valencia, Spain;
| | - Belén Picó
- Institute for the Conservation and Breeding of Valencian Agro-Diversity, Universitat Politècnica de València (COMAV-UPV), Camino de Vera s/n, 46022 Valencia, Spain; (A.K.); (A.S.); (B.P.)
| | - Carmelo López
- Institute for the Conservation and Breeding of Valencian Agro-Diversity, Universitat Politècnica de València (COMAV-UPV), Camino de Vera s/n, 46022 Valencia, Spain; (A.K.); (A.S.); (B.P.)
| |
Collapse
|
2
|
Li G, Tang L, He Y, Xu Y, Bendahmane A, Garcia-Mas J, Lin T, Zhao G. The haplotype-resolved T2T reference genome highlights structural variation underlying agronomic traits of melon. HORTICULTURE RESEARCH 2023; 10:uhad182. [PMID: 37885818 PMCID: PMC10599238 DOI: 10.1093/hr/uhad182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 09/04/2023] [Indexed: 10/28/2023]
Abstract
Melon (Cucumis melo L.) is an important vegetable crop that has an extensive history of cultivation. However, the genome of wild and semi-wild melon types that can be used for the analysis of agronomic traits is not yet available. Here we report a chromosome-level T2T genome assembly for 821 (C. melo ssp. agrestis var. acidulus), a semi-wild melon with two haplotypes of ~373 Mb and ~364 Mb, respectively. Comparative genome analysis discovered a significant number of structural variants (SVs) between melo (C. melo ssp. melo) and agrestis (C. melo ssp. agrestis) genomes, including a copy number variation located in the ToLCNDV resistance locus on chromosome 11. Genome-wide association studies detected a significant signal associated with climacteric ripening and identified one candidate gene CM_ac12g14720.1 (CmABA2), encoding a cytoplasmic short chain dehydrogenase/reductase, which controls the biosynthesis of abscisic acid. This study provides valuable genetic resources for future research on melon breeding.
Collapse
Affiliation(s)
- Guoli Li
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, Henan 450009, China
- China Agricultural University, College of Horticulture, Beijing 100193, China
| | - Lingli Tang
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, Henan 450009, China
- National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya, Hainan 572024, China
- Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang 453400, China
| | - Yuhua He
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, Henan 450009, China
- National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya, Hainan 572024, China
| | - Yongyang Xu
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, Henan 450009, China
- National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya, Hainan 572024, China
| | - Abdelhafid Bendahmane
- Institute of Plant Sciences Paris-Saclay (IPS2), INRAE, CNRS, University of Paris-Saclay, University of Evry, University of Paris-Diderot, Gif sur Yvette 91192, France
| | - Jordi Garcia-Mas
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Edifici CRAG, Campus UAB, Bellaterra, 08193 Barcelona, Spain
- Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Edifici CRAG, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Tao Lin
- China Agricultural University, College of Horticulture, Beijing 100193, China
| | - Guangwei Zhao
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, Henan 450009, China
- National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya, Hainan 572024, China
- Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang 453400, China
| |
Collapse
|
3
|
Cai L, Mei Y, Ye R, Deng Y, Zhang X, Hu Z, Zhou X, Zhang M, Yang J. Tomato leaf curl New Delhi virus: an emerging plant begomovirus threatening cucurbit production. ABIOTECH 2023; 4:257-266. [PMID: 37970471 PMCID: PMC10638221 DOI: 10.1007/s42994-023-00118-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 09/12/2023] [Indexed: 11/17/2023]
Abstract
Tomato leaf curl New Delhi virus (ToLCNDV), a bipartite begomovirus, was first reported to infect tomato and has recently spread rapidly as an emerging disease to Cucurbitaceae crops. To date, the virus has been reported to infect more than 11 cucurbit crops, in 16 countries and regions, causing severe yield losses. In autumn 2022, ToLCNDV was first isolated from cucurbit plants in Southeastern coastal areas of China. Phylogenetic analysis established that these isolates belong to the Asian ToLCNDV clade, and shared high nucleotide identity and closest genetic relationship with the DNA-A sequence from the Chinese tomato-infecting ToLCNDV isolate (Accession no. OP356207) and the tomato New Delhi ToLCNDV-Severe isolate (Accession no. HM159454). In this review, we summarize the occurrence and distribution, host range, detection and diagnosis, control strategies, and genetic resistance of ToLCNDV in the Cucurbitaceae. We then summarize pathways that could be undertaken to improve our understanding of this emerging disease, with the objective to develop ToLCNDV-resistant cucurbit cultivars. Supplementary Information The online version contains supplementary material available at 10.1007/s42994-023-00118-4.
Collapse
Affiliation(s)
- Lingmin Cai
- Laboratory of Germplasm Innovation and Molecular Breeding, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058 China
| | - Yuzhen Mei
- Institute of Biotechnology, Zhejiang University, Hangzhou, 310058 China
| | - Ruyi Ye
- Laboratory of Germplasm Innovation and Molecular Breeding, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058 China
| | - Yun Deng
- Peking University Institute of Advanced Agricultural Sciences, Weifang, 261000 China
| | - Xuejun Zhang
- Hami Melon Research Center, Xinjiang Academy of Agricultural Sciences, Urumqi, 830091 China
| | - Zhongyuan Hu
- Laboratory of Germplasm Innovation and Molecular Breeding, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058 China
- Hainan Institute, Zhejiang University, Yazhou Bay Science and Technology City, Sanya, 572025 China
- Key Laboratory of Horticultural Plant Growth and Development, Ministry of Agriculture and Rural Affairs, Hangzhou, 310058 China
| | - Xueping Zhou
- Institute of Biotechnology, Zhejiang University, Hangzhou, 310058 China
| | - Mingfang Zhang
- Laboratory of Germplasm Innovation and Molecular Breeding, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058 China
- Hainan Institute, Zhejiang University, Yazhou Bay Science and Technology City, Sanya, 572025 China
- Key Laboratory of Horticultural Plant Growth and Development, Ministry of Agriculture and Rural Affairs, Hangzhou, 310058 China
| | - Jinghua Yang
- Laboratory of Germplasm Innovation and Molecular Breeding, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058 China
- Hainan Institute, Zhejiang University, Yazhou Bay Science and Technology City, Sanya, 572025 China
- Key Laboratory of Horticultural Plant Growth and Development, Ministry of Agriculture and Rural Affairs, Hangzhou, 310058 China
| |
Collapse
|
4
|
Verma N, Garcha KS, Sharma A, Sharma M, Bhatia D, Khosa JS, Kaur B, Chuuneja P, Dhatt AS. Identification of a Major-Effect Quantitative Trait Loci Associated with Begomovirus Resistance in Cucurbita moschata. PHYTOPATHOLOGY 2023:PHYTO07220240FI. [PMID: 37352896 DOI: 10.1094/phyto-07-22-0240-fi] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/25/2023]
Abstract
Begomoviruses, viz. squash leaf curl China virus and tomato leaf curl New Delhi virus causative diseases are major concerns of quantitative and qualitative losses in pumpkin (Cucurbita moschata) worldwide. Punjab Agricultural University (PAU) in India has identified a resistant source (PVR-1343) against mixed infection (MI-Sq/To) of these begomoviruses. Introgression of resistance in diverse genetic backgrounds requires the identification of quantitative trait loci (QTLs) associated with MI-Sq/To resistance. Phenotyping of 229 F2:3 progenies derived from the PVR-1343 × P-135 cross revealed digenic recessive inheritance against MI-Sq/To resistance in PVR-1343. To identify the genomic region, resistant and susceptible bulks were subjected to whole-genome resequencing along with their parents. The whole-genome resequence analysis of parents and bulks using QTLseq/QTLseqr approaches identified an overlapping 1.52 Mb region on chromosome 7 (qMI-Sq/To7.1), while chromosomal region spanning 0.87 Mb on chromosome17 (qMI-Sq/To17.1) was additionally identified by QTLseqr. However, the highest peak value on chromosome 7 with three algorithms {G', ∆(SNP-index) and -log10 (P value)} highlighted the major contribution of qMI-Sq/To7.1 in MI-Sq/To resistance. Nine polymorphic SNPs identified within the highly significant qMI-Sq/To7.1 region were converted into KASP markers. KASP genotyping of F2 individuals narrowed down the qMI-Sq/To7.1 interval to 103 kb region flanked by two markers, Cmo3914729 and Cmo4018182, which contained 16 annotated genes and accounted for 59.84% of phenotypic variation. The Cmo4018182 KASP marker accurately predicted disease reaction in 91% of diverse Cucurbita genotypes and showed nonsynonym substitutions in the coding region of putative candidate SYNTAXIN-121 gene. These findings pave the way for marker-assisted breeding and elucidating the underlying mechanism of begomovirus resistance in C. moschata.
Collapse
Affiliation(s)
- Neha Verma
- Department of Vegetable Science, Punjab Agricultural University, Ludhiana, Punjab, India
| | - Karmvir Singh Garcha
- Department of Vegetable Science, Punjab Agricultural University, Ludhiana, Punjab, India
| | - Abhishek Sharma
- Department of Vegetable Science, Punjab Agricultural University, Ludhiana, Punjab, India
| | - Madhu Sharma
- Department of Vegetable Science, Punjab Agricultural University, Ludhiana, Punjab, India
| | - Dharminder Bhatia
- Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, Punjab, India
| | - Jiffinvir Singh Khosa
- Department of Vegetable Science, Punjab Agricultural University, Ludhiana, Punjab, India
| | - Barinder Kaur
- Department of Vegetable Science, Punjab Agricultural University, Ludhiana, Punjab, India
| | - Parveen Chuuneja
- School of Agricultural Biotechnology, Punjab Agricultural University, Ludhiana, Punjab, India
| | - Ajmer Singh Dhatt
- Directorate of Research, Punjab Agricultural University, Ludhiana, Punjab, India
| |
Collapse
|
5
|
Siskos L, Antoniou M, Riado J, Enciso M, Garcia C, Liberti D, Esselink D, Baranovskiy AG, Tahirov TH, Visser RGF, Kormelink R, Bai Y, Schouten HJ. DNA primase large subunit is an essential plant gene for geminiviruses, putatively priming viral ss-DNA replication. FRONTIERS IN PLANT SCIENCE 2023; 14:1130723. [PMID: 37008458 PMCID: PMC10064052 DOI: 10.3389/fpls.2023.1130723] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 03/03/2023] [Indexed: 06/19/2023]
Abstract
The family of Geminiviridae consists of more than 500 circular single-stranded (ss) DNA viral species that can infect numerous dicot and monocot plants. Geminiviruses replicate their genome in the nucleus of a plant cell, taking advantage of the host's DNA replication machinery. For converting their DNA into double-stranded DNA, and subsequent replication, these viruses rely on host DNA polymerases. However, the priming of the very first step of this process, i.e. the conversion of incoming circular ssDNA into a dsDNA molecule, has remained elusive for almost 30 years. In this study, sequencing of melon (Cucumis melo) accession K18 carrying the Tomato leaf curl New Delhi virus (ToLCNDV) recessive resistance quantitative trait locus (QTL) in chromosome 11, and analyses of DNA sequence data from 100 melon genomes, showed a conservation of a shared mutation in the DNA Primase Large subunit (PRiL) of all accessions that exhibited resistance upon a challenge with ToLCNDV. Silencing of (native) Nicotiana benthamiana PriL and subsequent challenging with three different geminiviruses showed a severe reduction in titers of all three viruses, altogether emphasizing an important role of PRiL in geminiviral replication. A model is presented explaining the role of PriL during initiation of geminiviral DNA replication, i.e. as a regulatory subunit of primase that generates an RNA primer at the onset of DNA replication in analogy to DNA Primase-mediated initiation of DNA replication in all living organisms.
Collapse
Affiliation(s)
- Lampros Siskos
- Laboratory of Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | - Maria Antoniou
- Laboratory of Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | - Jose Riado
- Sakata Vegetables Europe, Almeria, Spain
| | | | | | | | - Danny Esselink
- Laboratory of Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | - Andrey G. Baranovskiy
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, United States
| | - Tahir H. Tahirov
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, United States
| | - Richard G. F. Visser
- Laboratory of Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | - Richard Kormelink
- Laboratory of Virology, Wageningen University and Research, Wageningen, Netherlands
| | - Yuling Bai
- Laboratory of Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | - Henk J. Schouten
- Laboratory of Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| |
Collapse
|
6
|
Vo TTB, Cho WK, Jo Y, Lal A, Nattanong B, Qureshi MA, Tabssum M, Troiano E, Parrella G, Kil EJ, Lee TK, Lee S. Transcriptional Analysis of the Differences between ToLCNDV-India and ToLCNDV-ES Leading to Contrary Symptom Development in Cucumber. Int J Mol Sci 2023; 24:ijms24032181. [PMID: 36768502 PMCID: PMC9916722 DOI: 10.3390/ijms24032181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/19/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
Tomato leaf curl New Delhi virus-ES (ToLCNDV-ES), a high threat to cucurbits in the Mediterranean Basin, is listed as a different strain from the Asian ToLCNDV isolates. In this study, the infectivity of two clones previously isolated from Italy and Pakistan were compared in cucumbers, which resulted in the opposite symptom appearance. The swapping subgenome was processed; however, the mechanisms related to the disease phenotype remain unclear. To identify the disease-associated genes that could contribute to symptom development under the two ToLCNDV infections, the transcriptomes of ToLCNDV-infected and mock-inoculated cucumber plants were compared 21 days postinoculation. The number of differentially expressed genes in ToLCNDV-India-infected plants was 10 times higher than in ToLCNDV-ES-infected samples. The gene ontology (GO) and pathway enrichment were analyzed using the Cucurbits Genomics Database. The flavonoid pathway-related genes were upregulated in ToLCNDV-ES, but some were downregulated in ToLCNDV-India infection, suggesting their role in resistance to the two ToLCNDV infections. The relative expression levels of the selected candidate genes were validated by qRT-PCR under two ToLCNDV-infected conditions. Our results reveal the different infectivity of the two ToLCNDVs in cucumber and also provide primary information based on RNA-seq for further analysis related to different ToLCNDV infections.
Collapse
Affiliation(s)
- Thuy T. B. Vo
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Won Kyong Cho
- College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Yeonhwa Jo
- College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Aamir Lal
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Bupi Nattanong
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Muhammad Amir Qureshi
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Marjia Tabssum
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Elisa Troiano
- Institute for Sustainable Plant Protection of the National Research Council (IPSP-CNR), 80055 Portici, Italy
| | - Giuseppe Parrella
- Institute for Sustainable Plant Protection of the National Research Council (IPSP-CNR), 80055 Portici, Italy
| | - Eui-Joon Kil
- Department of Plant Medicals, Andong National University, Andong 36729, Republic of Korea
| | - Taek-Kyun Lee
- Risk Assessment Research Center, Korea Institute of Ocean Science & Technology, Geoje 53201, Republic of Korea
- Correspondence: (T.-K.L.); (S.L.)
| | - Sukchan Lee
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Correspondence: (T.-K.L.); (S.L.)
| |
Collapse
|
7
|
Vo TTB, Lal A, Ho PT, Troiano E, Parrella G, Kil EJ, Lee S. Different Infectivity of Mediterranean and Southern Asian Tomato Leaf Curl New Delhi Virus Isolates in Cucurbit Crops. PLANTS (BASEL, SWITZERLAND) 2022; 11:704. [PMID: 35270174 PMCID: PMC8912351 DOI: 10.3390/plants11050704] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/04/2022] [Accepted: 03/04/2022] [Indexed: 06/14/2023]
Abstract
Tomato leaf curl New Delhi virus (ToLCNDV) became an alerting virus in Europe from 2017 to 2020 because of its significant damage to Cucurbitaceae cultivation. Until now, just some cucurbit crops including sponge gourd, melon, pumpkin, and cucumber were reported to be resistant to ToLCNDV, but no commercial cultivars are available. In this study, a new isolate of ToLCNDV was identified in Pakistan and analyzed together with ToLCNDV-ES which was previously isolated in Italy. Furthermore, infectious clones of two ToLCNDV isolates were constructed and agroinoculated into different cucurbit crops to verify their infectivity. Results showed that both isolates exhibited severe infection on all tested cucurbit (>70%) except watermelon. Thus, those cultivars may be good candidates in the first step of screening genetic resources for resistance on both Southeast Asian and Mediterranean ToLCNDV isolates. Additional, comparison pathogenicity of different geographical ToLCNDV isolates will be aided to understand viral characterization as such knowledge could facilitate breeding resistance to this virus.
Collapse
Affiliation(s)
- Thuy T. B. Vo
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea; (T.T.B.V.); (A.L.); (P.T.H.)
| | - Aamir Lal
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea; (T.T.B.V.); (A.L.); (P.T.H.)
| | - Phuong T. Ho
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea; (T.T.B.V.); (A.L.); (P.T.H.)
| | - Elisa Troiano
- Institute for Sustainable Plant Protection of the National Research Council (IPSP-CNR), 80055 Portici, Italy;
| | - Giuseppe Parrella
- Institute for Sustainable Plant Protection of the National Research Council (IPSP-CNR), 80055 Portici, Italy;
| | - Eui-Joon Kil
- Department of Plant Medicals, Andong National University, Andong 36729, Korea
| | - Sukchan Lee
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea; (T.T.B.V.); (A.L.); (P.T.H.)
| |
Collapse
|
8
|
Special Issue "Plant Viruses: From Ecology to Control". Microorganisms 2021; 9:microorganisms9061136. [PMID: 34070318 PMCID: PMC8228693 DOI: 10.3390/microorganisms9061136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 05/20/2021] [Indexed: 11/17/2022] Open
|
9
|
Sáez C, Flores-León A, Montero-Pau J, Sifres A, Dhillon NPS, López C, Picó B. RNA-Seq Transcriptome Analysis Provides Candidate Genes for Resistance to Tomato Leaf Curl New Delhi Virus in Melon. FRONTIERS IN PLANT SCIENCE 2021; 12:798858. [PMID: 35116050 PMCID: PMC8805612 DOI: 10.3389/fpls.2021.798858] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 11/29/2021] [Indexed: 05/10/2023]
Abstract
Tomato leaf curl New Delhi virus (ToLCNDV) emerged in the Mediterranean Basin in 2012 as the first DNA bipartite begomovirus (Geminiviridae family), causing severe yield and economic losses in cucurbit crops. A major resistance locus was identified in the wild melon accession WM-7 (Cucumis melo kachri group), but the mechanisms involved in the resistant response remained unknown. In this work, we used RNA-sequencing to identify disease-associated genes that are differentially expressed in the course of ToLCNDV infection and could contribute to resistance. Transcriptomes of the resistant WM-7 genotype and the susceptible cultivar Piñonet Piel de Sapo (PS) (C. melo ibericus group) in ToLCNDV and mock inoculated plants were compared at four time points during infection (0, 3, 6, and 12 days post inoculation). Different gene expression patterns were observed over time in the resistant and susceptible genotypes in comparison to their respective controls. Differentially expressed genes (DEGs) in ToLCNDV-infected plants were classified using gene ontology (GO) terms, and genes of the categories transcription, DNA replication, and helicase activity were downregulated in WM-7 but upregulated in PS, suggesting that reduced activity of these functions reduces ToLCNDV replication and intercellular spread and thereby contributes to resistance. DEGs involved in the jasmonic acid signaling pathway, photosynthesis, RNA silencing, transmembrane, and sugar transporters entail adverse consequences for systemic infection in the resistant genotype, and lead to susceptibility in PS. The expression levels of selected candidate genes were validated by qRT-PCR to corroborate their differential expression upon ToLCNDV infection in resistant and susceptible melon. Furthermore, single nucleotide polymorphism (SNPs) with an effect on structural functionality of DEGs linked to the main QTLs for ToLCNDV resistance have been identified. The obtained results pinpoint cellular functions and candidate genes that are differentially expressed in a resistant and susceptible melon line in response to ToLCNDV, an information of great relevance for breeding ToLCNDV-resistant melon cultivars.
Collapse
Affiliation(s)
- Cristina Sáez
- Institute for the Conservation and Breeding of Agricultural Biodiversity, Universitat Politècnica de València, Valencia, Spain
- *Correspondence: Cristina Sáez,
| | - Alejandro Flores-León
- Institute for the Conservation and Breeding of Agricultural Biodiversity, Universitat Politècnica de València, Valencia, Spain
| | - Javier Montero-Pau
- Cavanilles Institute of Biodiversity and Evolutionary Biology, Universitat de València, Valencia, Spain
| | - Alicia Sifres
- Institute for the Conservation and Breeding of Agricultural Biodiversity, Universitat Politècnica de València, Valencia, Spain
| | - Narinder P. S. Dhillon
- World Vegetable Center, East and Southeast Asia, Research and Training Station, Kasetsart University, Nakhon Pathom, Thailand
| | - Carmelo López
- Institute for the Conservation and Breeding of Agricultural Biodiversity, Universitat Politècnica de València, Valencia, Spain
- Carmelo López,
| | - Belén Picó
- Institute for the Conservation and Breeding of Agricultural Biodiversity, Universitat Politècnica de València, Valencia, Spain
- Belén Picó,
| |
Collapse
|