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  1. Article ; Online: Evaluation of tolerance to Fusarium oxysporum and Fusarium solani in Virginia-type tobacco (Nicotiana tabacum L.) varieties under controlled conditions in Northwestern Argentina

    Lorena A. Berruezo / Eleonora M. Harries / Marta Z. Galván / Sebastian A. Stenglein / Guadalupe Mercado Cárdenas

    Revista de la Facultad de Ciencias Agrarias, Vol 53, Iss

    2021  Volume 2

    Abstract: The production of tobacco (Nicotiana tabacum L.) in Argentina is centered in the northwestern region (NWA), where the incidence of root rots and stem diseases caused by Fusarium spp. has increased considerably in recent years. This study aimed to ... ...

    Abstract The production of tobacco (Nicotiana tabacum L.) in Argentina is centered in the northwestern region (NWA), where the incidence of root rots and stem diseases caused by Fusarium spp. has increased considerably in recent years. This study aimed to evaluate the pathogenicity levels of isolates of the F. oxysporum and F. solani complexes in different varieties of Virginia Type tobacco. The commercial varieties MB47, PVH229, NC71, K346, K326, and K394 were inoculated with six isolates of both complexes. The variables evaluated were the incidence and severity of the symptoms. The area under the disease progress curves (AUDPC) was calculated and subjected to analysis of variance (ANOVA). Also, disease epidemiological models were fitted to the experimental data. The MB47 variety was significantly less infected and the varieties K346, K326, and K394 had the highest AUDPC means, showing susceptibility to the isolates. The disease intensity curves were adequately described by the monomolecular and logistic models. The results provide, for the first time, information about the levels of tolerance to vascular wilt and root rot under controlled conditions for the main varieties of Virginia-type tobacco grown in NWA. Highlights: • FOSC isolates produced mainly wilting, chlorosis, and growth reduction in tobacco plants; in contrast, FSSC isolates caused root rot, with characteristic necrotic lesions and root rot symptoms. • The highest DSI scores were registered for Fo27 and Fo15, while the lowest DSI score was found for Fs98. • The results obtained from the DSI scores were related to the mean AUDPC values of the isolates. • MB47 and NC71 were significantly less infected than the other varieties, which registered low AUDPC values.
    Keywords tolerance ; Nicotiana tabacum L ; FOSC ; FSSC ; soil-borne diseases ; pathogenicity ; Agriculture ; S ; Food processing and manufacture ; TP368-456
    Subject code 580
    Language English
    Publishing date 2021-12-01T00:00:00Z
    Publisher Facultad de Ciencias Agrarias. Universidad Nacional de Cuyo
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Evaluation of tolerance to Fusarium oxysporum and Fusarium solani in Virginia-type tobacco (Nicotiana tabacum L.) varieties under controlled conditions in Northwestern Argentina

    Lorena A. Berruezo / Eleonora M. Harries / Marta Z. Galván / Sebastian A. Stenglein / Guadalupe Mercado Cárdenas

    Revista de la Facultad de Ciencias Agrarias, Vol 53, Iss

    2021  Volume 2

    Abstract: The production of tobacco (Nicotiana tabacum L.) in Argentina is centered in the northwestern region (NWA), where the incidence of root rots and stem diseases caused by Fusarium spp. has increased considerably in recent years. This study aimed to ... ...

    Abstract The production of tobacco (Nicotiana tabacum L.) in Argentina is centered in the northwestern region (NWA), where the incidence of root rots and stem diseases caused by Fusarium spp. has increased considerably in recent years. This study aimed to evaluate the pathogenicity levels of isolates of the F. oxysporum and F. solani complexes in different varieties of Virginia Type tobacco. The commercial varieties MB47, PVH229, NC71, K346, K326, and K394 were inoculated with six isolates of both complexes. The variables evaluated were the incidence and severity of the symptoms. The area under the disease progress curves (AUDPC) was calculated and subjected to analysis of variance (ANOVA). Also, disease epidemiological models were fitted to the experimental data. The MB47 variety was significantly less infected and the varieties K346, K326, and K394 had the highest AUDPC means, showing susceptibility to the isolates. The disease intensity curves were adequately described by the monomolecular and logistic models. The results provide, for the first time, information about the levels of tolerance to vascular wilt and root rot under controlled conditions for the main varieties of Virginia-type tobacco grown in NWA. Highlights: • FOSC isolates produced mainly wilting, chlorosis, and growth reduction in tobacco plants; in contrast, FSSC isolates caused root rot, with characteristic necrotic lesions and root rot symptoms. • The highest DSI scores were registered for Fo27 and Fo15, while the lowest DSI score was found for Fs98. • The results obtained from the DSI scores were related to the mean AUDPC values of the isolates. • MB47 and NC71 were significantly less infected than the other varieties, which registered low AUDPC values.
    Keywords tolerance ; Nicotiana tabacum L ; FOSC ; FSSC ; soil-borne diseases ; pathogenicity ; Agriculture ; S ; Food processing and manufacture ; TP368-456
    Subject code 580
    Language English
    Publishing date 2021-12-01T00:00:00Z
    Publisher Facultad de Ciencias Agrarias. Universidad Nacional de Cuyo
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  3. Article ; Online: Evaluation of tolerance to Fusarium oxysporum and Fusarium solani in Virginia-type tobacco (Nicotiana tabacum L.) varieties under controlled conditions in Northwestern Argentina

    Lorena A. Berruezo / Eleonora M. Harries / Marta Z. Galván / Sebastian A. Stenglein / Guadalupe Mercado Cárdenas

    Revista de la Facultad de Ciencias Agrarias, Vol 53, Iss

    2021  Volume 2

    Abstract: The production of tobacco (Nicotiana tabacum L.) in Argentina is centered in the northwestern region (NWA), where the incidence of root rots and stem diseases caused by Fusarium spp. has increased considerably in recent years. This study aimed to ... ...

    Abstract The production of tobacco (Nicotiana tabacum L.) in Argentina is centered in the northwestern region (NWA), where the incidence of root rots and stem diseases caused by Fusarium spp. has increased considerably in recent years. This study aimed to evaluate the pathogenicity levels of isolates of the F. oxysporum and F. solani complexes in different varieties of Virginia Type tobacco. The commercial varieties MB47, PVH229, NC71, K346, K326, and K394 were inoculated with six isolates of both complexes. The variables evaluated were the incidence and severity of the symptoms. The area under the disease progress curves (AUDPC) was calculated and subjected to analysis of variance (ANOVA). Also, disease epidemiological models were fitted to the experimental data. The MB47 variety was significantly less infected and the varieties K346, K326, and K394 had the highest AUDPC means, showing susceptibility to the isolates. The disease intensity curves were adequately described by the monomolecular and logistic models. The results provide, for the first time, information about the levels of tolerance to vascular wilt and root rot under controlled conditions for the main varieties of Virginia-type tobacco grown in NWA. Highlights: • FOSC isolates produced mainly wilting, chlorosis, and growth reduction in tobacco plants; in contrast, FSSC isolates caused root rot, with characteristic necrotic lesions and root rot symptoms. • The highest DSI scores were registered for Fo27 and Fo15, while the lowest DSI score was found for Fs98. • The results obtained from the DSI scores were related to the mean AUDPC values of the isolates. • MB47 and NC71 were significantly less infected than the other varieties, which registered low AUDPC values.
    Keywords tolerance ; Nicotiana tabacum L ; FOSC ; FSSC ; soil-borne diseases ; pathogenicity ; Agriculture ; S ; Food processing and manufacture ; TP368-456
    Subject code 580
    Language English
    Publishing date 2021-12-01T00:00:00Z
    Publisher Facultad de Ciencias Agrarias. Universidad Nacional de Cuyo
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  4. Article: Characterization of Fusarium species associated with tobacco diseases in Northwestern Argentina

    Berruezo, Lorena A / Eleonora del M. Harries / Guadalupe E. Mercado Cárdenas / Marcela S. Rodriguero / Marta Z. Galván / Ramiro N. Curti / Sebastián A. Stenglein

    European journal of plant pathology. 2018 Aug., v. 151, no. 4

    2018  

    Abstract: Tobacco (Nicotiana tabacum L.) production is centred in the northwestern region of Argentina (NWA), where the incidence of root rot and stem diseases has increased considerably in recent years. This study aimed to analyse the genetic, morphological and ... ...

    Abstract Tobacco (Nicotiana tabacum L.) production is centred in the northwestern region of Argentina (NWA), where the incidence of root rot and stem diseases has increased considerably in recent years. This study aimed to analyse the genetic, morphological and pathogenic diversity of the Fusarium oxysporum and F. solani complexes (hereafter FOSC-FSSC), causing Fusarium wilt and root rot. One hundred tobacco fields were surveyed at six locations during two consecutive seasons, and 130 isolates were recovered from symptomatic tobacco plants. The isolates were characterized by morphological traits, molecular characteristics (EF1-α sequence) and pathogenicity tests. All of the isolates were identified as members of the FOSC or FSSC, exhibiting considerable intra-group variation. Three morphotypes were differentiated based on morphological characters in both complexes. The phylogenetic tree generated from the EF1-α sequences confirmed the isolates’ identification. The pathogenicity of the isolates towards tobacco seedlings was assessed in a greenhouse. Considerable variability in pathogenicity was observed among the isolates. Differences in the levels of pathogenicity were recorded. In the FOSC and FSSC, 81% and 60% of the isolates were pathogenic, respectively. In this study, members of FOSC and FSSC exhibited considerable variability in morphological characteristics and virulence, and a portion of them were non-pathogenic for tobacco. To the best of our knowledge, this study is the first to provide information on the variability of the pathogens associated with tobacco wilt and root rot in NWA. This work contributes to the development of sustainable management strategies in tobacco production.
    Keywords Fusarium oxysporum ; Fusarium wilt ; greenhouses ; morphs ; Nicotiana tabacum ; pathogens ; phylogeny ; root rot ; seedlings ; tobacco ; virulence ; Argentina
    Language English
    Dates of publication 2018-08
    Size p. 1065-1079.
    Publishing place Springer Netherlands
    Document type Article
    ZDB-ID 1196520-4
    ISSN 0929-1873
    ISSN 0929-1873
    DOI 10.1007/s10658-018-1443-6
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

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  5. Article: Molecular identification and pathogenicity of Rhizoctonia spp. from tobacco growing areas in northwestern Argentina

    Mercado Cárdenas, Guadalupe E / Marta Z. Galván / Viviana A. Barrera / Marcela S. Rodriguero / Marcelo A. Carmona / Guillermo J. March / Ana C. Ramallo / H. David Shew

    Tropical plant pathology. 2015 June, v. 40, no. 3

    2015  

    Abstract: In Argentina, more than 60 % of the tobacco crops are grown in the northwestern part of the country and where Rhizoctonia solani leads to a reduction in crop yield and quality. In this study, 35 isolates of Rhizoctonia were obtained from 32 tobacco ... ...

    Abstract In Argentina, more than 60 % of the tobacco crops are grown in the northwestern part of the country and where Rhizoctonia solani leads to a reduction in crop yield and quality. In this study, 35 isolates of Rhizoctonia were obtained from 32 tobacco fields in northwestern Argentina and characterized by both morphological and molecular approaches. Based on the variability in the ITS region, isolates were identified as R. solani (80 %), Waitea circinata var. zeae (Rhizoctonia zeae) (8 %) and binucleate Rhizoctonia (8 %). Most isolates of R. solani belonged to the anastomosis groups (AGs) AG 4 HG-I (44 %), AG 2-1 (41 %) and AG 4 HG-III (13 %). Isolates of binucleate Rhizoctonia belonged to AG-F and AG-P of Ceratobasidium sp. Morphological variability was higher within isolates of AG 2-1 and AG 4 HG-III than within those of AG 4 HG-I. Aggressiveness of the isolates towards tobacco seedlings was assessed in the greenhouse. Isolates of AG 2-1 were the most aggressive on leaves, causing target spot, whereas isolates of AG 4 HG-I were the most aggressive on stems and roots, causing damping-off.
    Keywords Ceratobasidium ; Rhizoctonia ; Thanatephorus cucumeris ; crop yield ; crops ; damping off ; greenhouses ; internal transcribed spacers ; leaves ; pathogenicity ; roots ; seedlings ; stems ; tobacco ; Argentina
    Language English
    Dates of publication 2015-06
    Size p. 160-168.
    Publishing place Springer International Publishing
    Document type Article
    ZDB-ID 2519866-X
    ISSN 1983-2052 ; 1982-5676
    ISSN (online) 1983-2052
    ISSN 1982-5676
    DOI 10.1007/s40858-015-0035-7
    Database NAL-Catalogue (AGRICOLA)

    Full text online

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