José Sebastián DAMBOLENA - Academia.edu (original) (raw)
Papers by José Sebastián DAMBOLENA
Viruses
Mitoviruses are small vertically transmitted RNA viruses found in fungi, plants and animals. Taxo... more Mitoviruses are small vertically transmitted RNA viruses found in fungi, plants and animals. Taxonomically, a total of 105 species and 4 genera have been formally recognized by ICTV, and recently, 18 new putative species have been included in a new proposed genus. Transcriptomic and metatranscriptomic studies are a major source of countless new virus-like sequences that are continually being added to open databases and these may be good sources for identifying new putative mitoviruses. The search for mitovirus-like sequences in the NCBI databases resulted in the discovery of more than one hundred new putative mitoviruses, with important implications for taxonomy and also for the evolutionary scenario. Here, we propose the inclusion of four new putative members to the genus Kvaramitovirus, and the existence of a new large basally divergent lineage composed of 144 members that lack internal UGA codons (subfamily “Arkeomitovirinae”), a feature not shared by the vast majority of mitovir...
BackgroundColletotrichum graminicola, the causal agent of maize anthracnose, is an important crop... more BackgroundColletotrichum graminicola, the causal agent of maize anthracnose, is an important crop disease worldwide. Understanding the genetic diversity and mechanisms underlying genetic variation in pathogen populations is crucial to the development of effective control strategies. The genus Colletotrichum is largely recognized as asexual, but several species have been reported to have a sexual cycle. Here, we employed a population genomics approach to investigate the genetic diversity and reproductive biology of C. graminicola isolates infecting maize. We sequenced 108 isolates of C. graminicola collected in 14 countries using restriction site-associated DNA sequencing (RAD-Seq) and whole-genome sequencing (WGS).ResultsClustering analyses based on single-nucleotide polymorphisms showed populational differentiation at a global scale, with three genetic groups delimited by continental origin, compatible with short-dispersal of the pathogen, and geographic subdivision. Distinct level...
Schemes (a) and (c) represent the 5`-UTR and 3`-UTR of FvMV1 with dG = -82.52 and dG = -29.55, re... more Schemes (a) and (c) represent the 5`-UTR and 3`-UTR of FvMV1 with dG = -82.52 and dG = -29.55, respectively. Schemes (b) and (d) represent the 5`-UTR and 3`-UTR of FaMV1-162 with dG = -73.96 and dG = -13.93, respectively. The +ssRNA molecules were folded, and the free energy was calculated with the RNA Folding Form V 2.3 Energies (MFOLD) program. For these calculations, the following conditions were sectioned: 25ºC, 1M NaCl and 0M divalent ions. The rendering of the structures has been defined with natural angles and annotated using colored base characters, based on p-num information. Colors are ranged from red to black representing the probability as well-determined (1) to poorly determined (0), respectively.
Journal of Stored Products Research, 2021
Fusarium verticillioides is a phytopathogenic fungus that can contaminate maize grain silos and r... more Fusarium verticillioides is a phytopathogenic fungus that can contaminate maize grain silos and result in important losses in the post-harvest product. The objective of this work was to investigate the effects of volatile organic compounds produced by four lactic acid bacterial strains isolated from maize grain silos on F. verticillioides M3125 growth and fumonisin B1 (FB1) production. The bacterial isolates 55 and 49 were identified as Enterococcus faecium and M4A and M4G as Enterococcus casseliflavus. The fungal growth was inhibited by 33.33% by the volatiles released by the M4A strain and by approximately 10% by the volatiles emitted by the 55 and 49 strains. The volatiles produced by the M4A strain also significantly reduced (88.75%) FB1 biosynthesis. The gas chromatography–mass spectrometer analysis identified 21 volatile organic compounds, with diacetyl, acetic acid and acetoin being the main volatiles emitted by the four bacterial strains. Acetoin was the volatile produced in...
Phytopathology, 2019
Mycoviruses from plant pathogens can induce hypovirulence (reduced virulence) in their host fungi... more Mycoviruses from plant pathogens can induce hypovirulence (reduced virulence) in their host fungi and have gained considerable attention as potential biocontrol tools. An increasing number of mycoviruses that induce fungal hypovirulence, from a wide variety of taxonomic groups, are currently being reported. Successful application of these viruses in disease management is greatly dependent on their ability to spread in the natural populations of the pathogen. Mycoviruses generally lack extracellular routes of transmission. Hyphal anastomosis is the main route of horizontal mycovirus transmission to other isolates, and conidia of vertical transmission to the progeny. Transmission efficiencies are influenced by both the fungal host and the infecting virus. Interestingly, artificial transfection methods have shown that potential biocontrol mycoviruses often have the ability to infect a variety of fungi. This expands their possible use to the control of pathogens others than those where ...
Journal of Stored Products Research, 2018
Abstract In living organisms, the cuticle has structural functions and is involved through chemic... more Abstract In living organisms, the cuticle has structural functions and is involved through chemical signaling in biological interactions such as plant-insect and provides protection against biotic and abiotic factors, thereby avoiding desiccation or the attack of predators. The objective of this study was to investigate the participation of the epicuticle in the maize kernel-Sitophilus zeamais interaction. The GC-MS analysis of the epicuticle extract demonstrated the presence of aliphatic hydrocarbons, alcohols, ethers, fatty acids, sterols and their derivatives. The results of bioassays show that the epicuticle of maize has a primordial role in its interaction with S. zeamais, and participates in the recognition and attraction to the food source, as well as regulating its reproduction. In addition the compounds present in the epicuticle extract may act as signal molecules and development regulators. This study reveals the effect of the maize kernel cuticle on Sitophilus behavior and contributes to the understanding of the interaction.
Folia Microbiologica, 2015
Journal of Agricultural and Food Chemistry, 2015
New agronomic practices and technology enabled Argentina a larger production of cereal grains, re... more New agronomic practices and technology enabled Argentina a larger production of cereal grains, reaching a harvest yielded of 26.5 million metric tons of maize, of which, about 40% was exported. However, much of the maize production is lost annually by the attack of fungi and insects (2.6 million tons). In the study, the antifungal effect of selected volatiles on Fusarium verticillioides, its mycotoxin production, and repellent and insecticidal activities against weevill S. zeamais, insect vector of F. verticillioides, were evaluated. Compounds tested were (2E)-2-hexenal, (2E)-2-nonenal, (2E,6Z)-2,6nonadienal, 1-pentanol, 1-hexanol, 1-butanol, 3-methyl-1-butanol, pentanal, 2-decanone and 3-decanone, which occur in the blend of volatile compounds emitted by various cereal grains. The most active antifungal were the aldehydes (2E)-2-nonenal, (2E)-2hexenal and (2E,6Z)-2,6-nonadienal [Minimum Inhibitory Concentration (MIC) values of < 0.03mM, 0.06mM and 0.06mM, respectively]. The fumonisin B 1 (FB 1) occurrence also was prevented because these compounds completely inhibited the fungal growth. The best insecticidal fumigant activities against maize weevil were shown by 2decanone and 3-decanone [Lethal Concentration (LC 50) ≤ 54.6 µl/L (<0.28 mM)]. Although, all tested compounds showed repellent activity against S. zeamais at a concentration of 4 µl/L, the (2E,6Z)-2,6-nonadienal was the most active repellent compound. These results demonstrate the potential of (2E,6Z)-2,6-nonadienal to be used as a natural alternative to synthetic pesticides on F. verticillioides and S. zeamais.
… y del Caribe de …, 2011
The chemical composition of the leaf oils of five Juniperus species (Juniperus sabina L., Juniper... more The chemical composition of the leaf oils of five Juniperus species (Juniperus sabina L., Juniperus communis Lam., Juniperus scopulorum Sarg., Juniperus virginiana L., Juniperus chinensis L., Cupressaceae) was determined by co-chromatography with authentic samples, GC-MS and Kováts retention indices. Sabinene was the most abundant component in the oils of Juniperus from western Patagonia Argentina. However, limonene and germacrene B constituted 25.1% and 11.5% of the oil of J. sabina. J. virginiana showed high concentration of alpha-humulene and limonene (31.4 and 15.9% respectively), while isobornyl acetate and germacrene B were also the main compounds of J. chinensis. Essential oils extracted of Juniperus were evaluated in vitro for their efficacy against Fusarium verticillioides, Aspergillus flavus, Aspergillus parasiticus, Candida albicans and Rhodotorula infection. Candida albicans was not inhibited for the essential oils of Juniperus. However, F. verticillioides, A. flavus, A. parasiticus and Rhodotorula were inhibited for these oils.
Journal of Agricultural and Food Chemistry, 2010
The aim of this work was to compare the antiradical activity, total phenol content (TPC), and ess... more The aim of this work was to compare the antiradical activity, total phenol content (TPC), and essential oil composition of Origanum vulgare spp. virens, Origanum x applii, Origanum x majoricum, and O. vulgare spp. vulgare cultivated in Argentina in different localities. The experiment was conducted in the research station of La Consulta (INTA-Mendoza), the research station of Santa Lucia (INTA-San Juan), and Agronomy Faculty of National University of La Pampa, from 2007 to 2008. The composition of the essential oils of oregano populations was independent of cultivation conditions. In total, 39 compounds were identified in essential oils of oregano from Argentina by means of GC-MS. Thymol and trans-sabinene hydrate were the most prominent compounds, followed by gamma-terpinene, terpinen-4-ol, and alpha-terpinene. O. vulgare vulgare is the only Origanum studied which is rich in gamma-terpinene. Among tested oregano, O. x majoricum showed the highest essential oil content, 3.9 mg g(-1) dry matter. The plant extract of O. x majoricum had greater total phenol content values, 19.36 mg/g dry weight, than the rest of oregano studied. To find relationships among TPC, free radical scavenging activity (FRSA), and climate variables, canonical correlations were calculated. The results obtained allow us to conclude that 70% of the TPC and FRSA variability can be explained by the climate variables (R(2) = 0.70; p = 8.3 x 10(-6)), the temperature being the most important climatic variable.
Innovative Food Science & Emerging Technologies, 2010
Viruses, 2020
Mycoviruses appear to be widespread in Fusarium species worldwide. The aim of this work was to id... more Mycoviruses appear to be widespread in Fusarium species worldwide. The aim of this work was to identify mycoviral infections in Fusarium spp., isolated from maize and sorghum grown in Argentina, and to estimate their potential effects on the pathogenicity and toxigenesis of the host fungus towards maize. Mycoviruses were identified in 2 out of 105 isolates analyzed; Fusarium verticillioides strain Sec505 and Fusarium andiyazi strain 162. They were characterized as members of the genus Mitovirus by high-throughput sequencing and sequence analysis. The F. verticillioides mitovirus was a novel mycovirus whereas the F. andiyazi mitovirus was found to be a new strain of a previously identified mitovirus. We have named these mitoviruses, Fusarium verticillioides mitovirus 1 (FvMV1) and Fusarium andiyazi mitovirus 1 strain 162 (FaMV1-162). To our knowledge, FvMV1 is the first mycovirus reported as naturally infecting F. verticillioides, the major causal agent of ear rot and fumonisin produ...
Plant Systematics and Evolution
Viruses
Mitoviruses are small vertically transmitted RNA viruses found in fungi, plants and animals. Taxo... more Mitoviruses are small vertically transmitted RNA viruses found in fungi, plants and animals. Taxonomically, a total of 105 species and 4 genera have been formally recognized by ICTV, and recently, 18 new putative species have been included in a new proposed genus. Transcriptomic and metatranscriptomic studies are a major source of countless new virus-like sequences that are continually being added to open databases and these may be good sources for identifying new putative mitoviruses. The search for mitovirus-like sequences in the NCBI databases resulted in the discovery of more than one hundred new putative mitoviruses, with important implications for taxonomy and also for the evolutionary scenario. Here, we propose the inclusion of four new putative members to the genus Kvaramitovirus, and the existence of a new large basally divergent lineage composed of 144 members that lack internal UGA codons (subfamily “Arkeomitovirinae”), a feature not shared by the vast majority of mitovir...
BackgroundColletotrichum graminicola, the causal agent of maize anthracnose, is an important crop... more BackgroundColletotrichum graminicola, the causal agent of maize anthracnose, is an important crop disease worldwide. Understanding the genetic diversity and mechanisms underlying genetic variation in pathogen populations is crucial to the development of effective control strategies. The genus Colletotrichum is largely recognized as asexual, but several species have been reported to have a sexual cycle. Here, we employed a population genomics approach to investigate the genetic diversity and reproductive biology of C. graminicola isolates infecting maize. We sequenced 108 isolates of C. graminicola collected in 14 countries using restriction site-associated DNA sequencing (RAD-Seq) and whole-genome sequencing (WGS).ResultsClustering analyses based on single-nucleotide polymorphisms showed populational differentiation at a global scale, with three genetic groups delimited by continental origin, compatible with short-dispersal of the pathogen, and geographic subdivision. Distinct level...
Schemes (a) and (c) represent the 5`-UTR and 3`-UTR of FvMV1 with dG = -82.52 and dG = -29.55, re... more Schemes (a) and (c) represent the 5`-UTR and 3`-UTR of FvMV1 with dG = -82.52 and dG = -29.55, respectively. Schemes (b) and (d) represent the 5`-UTR and 3`-UTR of FaMV1-162 with dG = -73.96 and dG = -13.93, respectively. The +ssRNA molecules were folded, and the free energy was calculated with the RNA Folding Form V 2.3 Energies (MFOLD) program. For these calculations, the following conditions were sectioned: 25ºC, 1M NaCl and 0M divalent ions. The rendering of the structures has been defined with natural angles and annotated using colored base characters, based on p-num information. Colors are ranged from red to black representing the probability as well-determined (1) to poorly determined (0), respectively.
Journal of Stored Products Research, 2021
Fusarium verticillioides is a phytopathogenic fungus that can contaminate maize grain silos and r... more Fusarium verticillioides is a phytopathogenic fungus that can contaminate maize grain silos and result in important losses in the post-harvest product. The objective of this work was to investigate the effects of volatile organic compounds produced by four lactic acid bacterial strains isolated from maize grain silos on F. verticillioides M3125 growth and fumonisin B1 (FB1) production. The bacterial isolates 55 and 49 were identified as Enterococcus faecium and M4A and M4G as Enterococcus casseliflavus. The fungal growth was inhibited by 33.33% by the volatiles released by the M4A strain and by approximately 10% by the volatiles emitted by the 55 and 49 strains. The volatiles produced by the M4A strain also significantly reduced (88.75%) FB1 biosynthesis. The gas chromatography–mass spectrometer analysis identified 21 volatile organic compounds, with diacetyl, acetic acid and acetoin being the main volatiles emitted by the four bacterial strains. Acetoin was the volatile produced in...
Phytopathology, 2019
Mycoviruses from plant pathogens can induce hypovirulence (reduced virulence) in their host fungi... more Mycoviruses from plant pathogens can induce hypovirulence (reduced virulence) in their host fungi and have gained considerable attention as potential biocontrol tools. An increasing number of mycoviruses that induce fungal hypovirulence, from a wide variety of taxonomic groups, are currently being reported. Successful application of these viruses in disease management is greatly dependent on their ability to spread in the natural populations of the pathogen. Mycoviruses generally lack extracellular routes of transmission. Hyphal anastomosis is the main route of horizontal mycovirus transmission to other isolates, and conidia of vertical transmission to the progeny. Transmission efficiencies are influenced by both the fungal host and the infecting virus. Interestingly, artificial transfection methods have shown that potential biocontrol mycoviruses often have the ability to infect a variety of fungi. This expands their possible use to the control of pathogens others than those where ...
Journal of Stored Products Research, 2018
Abstract In living organisms, the cuticle has structural functions and is involved through chemic... more Abstract In living organisms, the cuticle has structural functions and is involved through chemical signaling in biological interactions such as plant-insect and provides protection against biotic and abiotic factors, thereby avoiding desiccation or the attack of predators. The objective of this study was to investigate the participation of the epicuticle in the maize kernel-Sitophilus zeamais interaction. The GC-MS analysis of the epicuticle extract demonstrated the presence of aliphatic hydrocarbons, alcohols, ethers, fatty acids, sterols and their derivatives. The results of bioassays show that the epicuticle of maize has a primordial role in its interaction with S. zeamais, and participates in the recognition and attraction to the food source, as well as regulating its reproduction. In addition the compounds present in the epicuticle extract may act as signal molecules and development regulators. This study reveals the effect of the maize kernel cuticle on Sitophilus behavior and contributes to the understanding of the interaction.
Folia Microbiologica, 2015
Journal of Agricultural and Food Chemistry, 2015
New agronomic practices and technology enabled Argentina a larger production of cereal grains, re... more New agronomic practices and technology enabled Argentina a larger production of cereal grains, reaching a harvest yielded of 26.5 million metric tons of maize, of which, about 40% was exported. However, much of the maize production is lost annually by the attack of fungi and insects (2.6 million tons). In the study, the antifungal effect of selected volatiles on Fusarium verticillioides, its mycotoxin production, and repellent and insecticidal activities against weevill S. zeamais, insect vector of F. verticillioides, were evaluated. Compounds tested were (2E)-2-hexenal, (2E)-2-nonenal, (2E,6Z)-2,6nonadienal, 1-pentanol, 1-hexanol, 1-butanol, 3-methyl-1-butanol, pentanal, 2-decanone and 3-decanone, which occur in the blend of volatile compounds emitted by various cereal grains. The most active antifungal were the aldehydes (2E)-2-nonenal, (2E)-2hexenal and (2E,6Z)-2,6-nonadienal [Minimum Inhibitory Concentration (MIC) values of < 0.03mM, 0.06mM and 0.06mM, respectively]. The fumonisin B 1 (FB 1) occurrence also was prevented because these compounds completely inhibited the fungal growth. The best insecticidal fumigant activities against maize weevil were shown by 2decanone and 3-decanone [Lethal Concentration (LC 50) ≤ 54.6 µl/L (<0.28 mM)]. Although, all tested compounds showed repellent activity against S. zeamais at a concentration of 4 µl/L, the (2E,6Z)-2,6-nonadienal was the most active repellent compound. These results demonstrate the potential of (2E,6Z)-2,6-nonadienal to be used as a natural alternative to synthetic pesticides on F. verticillioides and S. zeamais.
… y del Caribe de …, 2011
The chemical composition of the leaf oils of five Juniperus species (Juniperus sabina L., Juniper... more The chemical composition of the leaf oils of five Juniperus species (Juniperus sabina L., Juniperus communis Lam., Juniperus scopulorum Sarg., Juniperus virginiana L., Juniperus chinensis L., Cupressaceae) was determined by co-chromatography with authentic samples, GC-MS and Kováts retention indices. Sabinene was the most abundant component in the oils of Juniperus from western Patagonia Argentina. However, limonene and germacrene B constituted 25.1% and 11.5% of the oil of J. sabina. J. virginiana showed high concentration of alpha-humulene and limonene (31.4 and 15.9% respectively), while isobornyl acetate and germacrene B were also the main compounds of J. chinensis. Essential oils extracted of Juniperus were evaluated in vitro for their efficacy against Fusarium verticillioides, Aspergillus flavus, Aspergillus parasiticus, Candida albicans and Rhodotorula infection. Candida albicans was not inhibited for the essential oils of Juniperus. However, F. verticillioides, A. flavus, A. parasiticus and Rhodotorula were inhibited for these oils.
Journal of Agricultural and Food Chemistry, 2010
The aim of this work was to compare the antiradical activity, total phenol content (TPC), and ess... more The aim of this work was to compare the antiradical activity, total phenol content (TPC), and essential oil composition of Origanum vulgare spp. virens, Origanum x applii, Origanum x majoricum, and O. vulgare spp. vulgare cultivated in Argentina in different localities. The experiment was conducted in the research station of La Consulta (INTA-Mendoza), the research station of Santa Lucia (INTA-San Juan), and Agronomy Faculty of National University of La Pampa, from 2007 to 2008. The composition of the essential oils of oregano populations was independent of cultivation conditions. In total, 39 compounds were identified in essential oils of oregano from Argentina by means of GC-MS. Thymol and trans-sabinene hydrate were the most prominent compounds, followed by gamma-terpinene, terpinen-4-ol, and alpha-terpinene. O. vulgare vulgare is the only Origanum studied which is rich in gamma-terpinene. Among tested oregano, O. x majoricum showed the highest essential oil content, 3.9 mg g(-1) dry matter. The plant extract of O. x majoricum had greater total phenol content values, 19.36 mg/g dry weight, than the rest of oregano studied. To find relationships among TPC, free radical scavenging activity (FRSA), and climate variables, canonical correlations were calculated. The results obtained allow us to conclude that 70% of the TPC and FRSA variability can be explained by the climate variables (R(2) = 0.70; p = 8.3 x 10(-6)), the temperature being the most important climatic variable.
Innovative Food Science & Emerging Technologies, 2010
Viruses, 2020
Mycoviruses appear to be widespread in Fusarium species worldwide. The aim of this work was to id... more Mycoviruses appear to be widespread in Fusarium species worldwide. The aim of this work was to identify mycoviral infections in Fusarium spp., isolated from maize and sorghum grown in Argentina, and to estimate their potential effects on the pathogenicity and toxigenesis of the host fungus towards maize. Mycoviruses were identified in 2 out of 105 isolates analyzed; Fusarium verticillioides strain Sec505 and Fusarium andiyazi strain 162. They were characterized as members of the genus Mitovirus by high-throughput sequencing and sequence analysis. The F. verticillioides mitovirus was a novel mycovirus whereas the F. andiyazi mitovirus was found to be a new strain of a previously identified mitovirus. We have named these mitoviruses, Fusarium verticillioides mitovirus 1 (FvMV1) and Fusarium andiyazi mitovirus 1 strain 162 (FaMV1-162). To our knowledge, FvMV1 is the first mycovirus reported as naturally infecting F. verticillioides, the major causal agent of ear rot and fumonisin produ...
Plant Systematics and Evolution