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4. Plant Resistance to Geminiviruses

Author

Patil, Basavaprabhu L., primary, Chakraborty, Supriya, additional, Czosnek, Henryk, additional, Fiallo-Olivé, Elvira, additional, Gilbertson, Robert L., additional, Legg, James, additional, Mansoor, Shahid, additional, Navas-Castillo, Jesús, additional, Naqvi, Rubab Z., additional, Rahman, Saleem U., additional, and Zerbini, Francisco M., additional

Published
2021
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6. Annual (2023) taxonomic update of RNA-directed RNA polymerase-encoding negative-sense RNA viruses (realm Riboviria: kingdom Orthornavirae: phylum Negarnaviricota)

Author

Kuhn, J, Abe, J, Adkins, S, Alkhovsky, S, Avsic-Zupanc, T, Ayllon, M, Bahl, J, Balkema-Buschmann, A, Ballinger, M, Baranwal, V, Beer, M, Bejerman, N, Bergeron, E, Biedenkopf, N, Blair, C, Blasdell, K, Blouin, A, Bradfute, S, Briese, T, Brown, P, Buchholz, U, Buchmeier, M, Bukreyev, A, Burt, F, Buttner, C, Calisher, C, Cao, M, Casas, I, Chandran, K, Charrel, R, Chaturvedi, K, Chooi, K, Crane, A, Bo, E, de la Torre, J, de Souza, W, de Swart, R, Debat, H, Dheilly, N, Di Paola, N, Di Serio, F, Dietzgen, R, Digiaro, M, Drexler, J, Duprex, W, Durrwald, R, Easton, A, Elbeaino, T, Ergunay, K, Feng, G, Firth, A, Fooks, A, Formenty, P, Freitas-Astua, J, Gago-Zachert, S, Garcia, M, Garcia-Sastre, A, Garrison, A, Gaskin, T, Gong, W, Gonzalez, J, de Bellocq, J, Griffiths, A, Groschup, M, Gunther, I, Gunther, S, Hammond, J, Hasegawa, Y, Hayashi, K, Hepojoki, J, Higgins, C, Hongo, S, Horie, M, Hughes, H, Hume, A, Hyndman, T, Ikeda, K, Jiang, D, Jonson, G, Junglen, S, Klempa, B, Klingstrom, J, Kondo, H, Koonin, E, Krupovic, M, Kubota, K, Kurath, G, Laenen, L, Lambert, A, Li, J, Liu, R, Lukashevich, I, Macdiarmid, R, Maes, P, Marklewitz, M, Marshall, S, Marzano, S, Mccauley, J, Mirazimi, A, Muhlberger, E, Nabeshima, T, Naidu, R, Natsuaki, T, Navarro, B, Navarro, J, Neriya, Y, Netesov, S, Neumann, G, Nowotny, N, Nunes, M, Ochoa-Corona, F, Okada, T, Palacios, G, Pallas, V, Papa, A, Paraskevopoulou, S, Parrish, C, Pauvolid-Correa, A, Paweska, J, Perez, D, Pfaff, F, Plemper, R, Postler, T, Rabbidge, L, Radoshitzky, S, Ramos-Gonzalez, P, Rehanek, M, Resende, R, Reyes, C, Rodrigues, T, Romanowski, V, Rubbenstroth, D, Rubino, L, Runstadler, J, Sabanadzovic, S, Sadiq, S, Salvato, M, Sasaya, T, Schwemmle, M, Sharpe, S, Shi, M, Shimomoto, Y, Sidharthan, V, Sironi, M, Smither, S, Song, J, Spann, K, Spengler, J, Stenglein, M, Takada, A, Takeyama, S, Tatara, A, Tesh, R, Thornburg, N, Tian, X, Tischler, N, Tomitaka, Y, Tomonaga, K, Tordo, N, Tu, C, Turina, M, Tzanetakis, I, Vaira, A, van den Hoogen, B, Vanmechelen, B, Vasilakis, N, Verbeek, M, von Bargen, S, Wada, J, Wahl, V, Walker, P, Waltzek, T, Whitfield, A, Wolf, Y, Xia, H, Xylogianni, E, Yanagisawa, H, Yano, K, Ye, G, Yuan, Z, Zerbini, F, Zhang, G, Zhang, S, Zhang, Y, Zhao, L, Okland, A, Kuhn J. H., Abe J., Adkins S., Alkhovsky S. V., Avsic-Zupanc T., Ayllon M. A., Bahl J., Balkema-Buschmann A., Ballinger M. J., Baranwal V. K., Beer M., Bejerman N., Bergeron E., Biedenkopf N., Blair C. D., Blasdell K. R., Blouin A. G., Bradfute S. B., Briese T., Brown P. A., Buchholz U. J., Buchmeier M. J., Bukreyev A., Burt F., Buttner C., Calisher C. H., Cao M., Casas I., Chandran K., Charrel R. N., Chaturvedi K. K., Chooi K. M., Crane A., Bo E. D., de la Torre J. C., de Souza W. M., de Swart R. L., Debat H., Dheilly N. M., Di Paola N., Di Serio F., Dietzgen R. G., Digiaro M., Drexler J. F., Duprex W. P., Durrwald R., Easton A. J., Elbeaino T., Ergunay K., Feng G., Firth A. E., Fooks A. R., Formenty P. B. H., Freitas-Astua J., Gago-Zachert S., Garcia M. L., Garcia-Sastre A., Garrison A. R., Gaskin T. R., Gong W., Gonzalez J. -P. J., de Bellocq J., Griffiths A., Groschup M. H., Gunther I., Gunther S., Hammond J., Hasegawa Y., Hayashi K., Hepojoki J., Higgins C. M., Hongo S., Horie M., Hughes H. R., Hume A. J., Hyndman T. H., Ikeda K., Jiang D., Jonson G. B., Junglen S., Klempa B., Klingstrom J., Kondo H., Koonin E. V., Krupovic M., Kubota K., Kurath G., Laenen L., Lambert A. J., Li J., Li J. -M., Liu R., Lukashevich I. S., MacDiarmid R. M., Maes P., Marklewitz M., Marshall S. H., Marzano S. -Y. L., McCauley J. W., Mirazimi A., Muhlberger E., Nabeshima T., Naidu R., Natsuaki T., Navarro B., Navarro J. A., Neriya Y., Netesov S. V., Neumann G., Nowotny N., Nunes M. R. T., Ochoa-Corona F. M., Okada T., Palacios G., Pallas V., Papa A., Paraskevopoulou S., Parrish C. R., Pauvolid-Correa A., Paweska J. T., Perez D. R., Pfaff F., Plemper R. K., Postler T. S., Rabbidge L. O., Radoshitzky S. R., Ramos-Gonzalez P. L., Rehanek M., Resende R. O., Reyes C. A., Rodrigues T. C. S., Romanowski V., Rubbenstroth D., Rubino L., Runstadler J. A., Sabanadzovic S., Sadiq S., Salvato M. S., Sasaya T., Schwemmle M., Sharpe S. R., Shi M., Shimomoto Y., Sidharthan V. K., Sironi M., Smither S., Song J. -W., Spann K. M., Spengler J. R., Stenglein M. D., Takada A., Takeyama S., Tatara A., Tesh R. B., Thornburg N. J., Tian X., Tischler N. D., Tomitaka Y., Tomonaga K., Tordo N., Tu C., Turina M., Tzanetakis I. E., Vaira A. M., van den Hoogen B., Vanmechelen B., Vasilakis N., Verbeek M., von Bargen S., Wada J., Wahl V., Walker P. J., Waltzek T. B., Whitfield A. E., Wolf Y. I., Xia H., Xylogianni E., Yanagisawa H., Yano K., Ye G., Yuan Z., Zerbini F. M., Zhang G., Zhang S., Zhang Y. -Z., Zhao L., Okland A. L., Kuhn, J, Abe, J, Adkins, S, Alkhovsky, S, Avsic-Zupanc, T, Ayllon, M, Bahl, J, Balkema-Buschmann, A, Ballinger, M, Baranwal, V, Beer, M, Bejerman, N, Bergeron, E, Biedenkopf, N, Blair, C, Blasdell, K, Blouin, A, Bradfute, S, Briese, T, Brown, P, Buchholz, U, Buchmeier, M, Bukreyev, A, Burt, F, Buttner, C, Calisher, C, Cao, M, Casas, I, Chandran, K, Charrel, R, Chaturvedi, K, Chooi, K, Crane, A, Bo, E, de la Torre, J, de Souza, W, de Swart, R, Debat, H, Dheilly, N, Di Paola, N, Di Serio, F, Dietzgen, R, Digiaro, M, Drexler, J, Duprex, W, Durrwald, R, Easton, A, Elbeaino, T, Ergunay, K, Feng, G, Firth, A, Fooks, A, Formenty, P, Freitas-Astua, J, Gago-Zachert, S, Garcia, M, Garcia-Sastre, A, Garrison, A, Gaskin, T, Gong, W, Gonzalez, J, de Bellocq, J, Griffiths, A, Groschup, M, Gunther, I, Gunther, S, Hammond, J, Hasegawa, Y, Hayashi, K, Hepojoki, J, Higgins, C, Hongo, S, Horie, M, Hughes, H, Hume, A, Hyndman, T, Ikeda, K, Jiang, D, Jonson, G, Junglen, S, Klempa, B, Klingstrom, J, Kondo, H, Koonin, E, Krupovic, M, Kubota, K, Kurath, G, Laenen, L, Lambert, A, Li, J, Liu, R, Lukashevich, I, Macdiarmid, R, Maes, P, Marklewitz, M, Marshall, S, Marzano, S, Mccauley, J, Mirazimi, A, Muhlberger, E, Nabeshima, T, Naidu, R, Natsuaki, T, Navarro, B, Navarro, J, Neriya, Y, Netesov, S, Neumann, G, Nowotny, N, Nunes, M, Ochoa-Corona, F, Okada, T, Palacios, G, Pallas, V, Papa, A, Paraskevopoulou, S, Parrish, C, Pauvolid-Correa, A, Paweska, J, Perez, D, Pfaff, F, Plemper, R, Postler, T, Rabbidge, L, Radoshitzky, S, Ramos-Gonzalez, P, Rehanek, M, Resende, R, Reyes, C, Rodrigues, T, Romanowski, V, Rubbenstroth, D, Rubino, L, Runstadler, J, Sabanadzovic, S, Sadiq, S, Salvato, M, Sasaya, T, Schwemmle, M, Sharpe, S, Shi, M, Shimomoto, Y, Sidharthan, V, Sironi, M, Smither, S, Song, J, Spann, K, Spengler, J, Stenglein, M, Takada, A, Takeyama, S, Tatara, A, Tesh, R, Thornburg, N, Tian, X, Tischler, N, Tomitaka, Y, Tomonaga, K, Tordo, N, Tu, C, Turina, M, Tzanetakis, I, Vaira, A, van den Hoogen, B, Vanmechelen, B, Vasilakis, N, Verbeek, M, von Bargen, S, Wada, J, Wahl, V, Walker, P, Waltzek, T, Whitfield, A, Wolf, Y, Xia, H, Xylogianni, E, Yanagisawa, H, Yano, K, Ye, G, Yuan, Z, Zerbini, F, Zhang, G, Zhang, S, Zhang, Y, Zhao, L, Okland, A, Kuhn J. H., Abe J., Adkins S., Alkhovsky S. V., Avsic-Zupanc T., Ayllon M. A., Bahl J., Balkema-Buschmann A., Ballinger M. J., Baranwal V. K., Beer M., Bejerman N., Bergeron E., Biedenkopf N., Blair C. D., Blasdell K. R., Blouin A. G., Bradfute S. B., Briese T., Brown P. A., Buchholz U. J., Buchmeier M. J., Bukreyev A., Burt F., Buttner C., Calisher C. H., Cao M., Casas I., Chandran K., Charrel R. N., Chaturvedi K. K., Chooi K. M., Crane A., Bo E. D., de la Torre J. C., de Souza W. M., de Swart R. L., Debat H., Dheilly N. M., Di Paola N., Di Serio F., Dietzgen R. G., Digiaro M., Drexler J. F., Duprex W. P., Durrwald R., Easton A. J., Elbeaino T., Ergunay K., Feng G., Firth A. E., Fooks A. R., Formenty P. B. H., Freitas-Astua J., Gago-Zachert S., Garcia M. L., Garcia-Sastre A., Garrison A. R., Gaskin T. R., Gong W., Gonzalez J. -P. J., de Bellocq J., Griffiths A., Groschup M. H., Gunther I., Gunther S., Hammond J., Hasegawa Y., Hayashi K., Hepojoki J., Higgins C. M., Hongo S., Horie M., Hughes H. R., Hume A. J., Hyndman T. H., Ikeda K., Jiang D., Jonson G. B., Junglen S., Klempa B., Klingstrom J., Kondo H., Koonin E. V., Krupovic M., Kubota K., Kurath G., Laenen L., Lambert A. J., Li J., Li J. -M., Liu R., Lukashevich I. S., MacDiarmid R. M., Maes P., Marklewitz M., Marshall S. H., Marzano S. -Y. L., McCauley J. W., Mirazimi A., Muhlberger E., Nabeshima T., Naidu R., Natsuaki T., Navarro B., Navarro J. A., Neriya Y., Netesov S. V., Neumann G., Nowotny N., Nunes M. R. T., Ochoa-Corona F. M., Okada T., Palacios G., Pallas V., Papa A., Paraskevopoulou S., Parrish C. R., Pauvolid-Correa A., Paweska J. T., Perez D. R., Pfaff F., Plemper R. K., Postler T. S., Rabbidge L. O., Radoshitzky S. R., Ramos-Gonzalez P. L., Rehanek M., Resende R. O., Reyes C. A., Rodrigues T. C. S., Romanowski V., Rubbenstroth D., Rubino L., Runstadler J. A., Sabanadzovic S., Sadiq S., Salvato M. S., Sasaya T., Schwemmle M., Sharpe S. R., Shi M., Shimomoto Y., Sidharthan V. K., Sironi M., Smither S., Song J. -W., Spann K. M., Spengler J. R., Stenglein M. D., Takada A., Takeyama S., Tatara A., Tesh R. B., Thornburg N. J., Tian X., Tischler N. D., Tomitaka Y., Tomonaga K., Tordo N., Tu C., Turina M., Tzanetakis I. E., Vaira A. M., van den Hoogen B., Vanmechelen B., Vasilakis N., Verbeek M., von Bargen S., Wada J., Wahl V., Walker P. J., Waltzek T. B., Whitfield A. E., Wolf Y. I., Xia H., Xylogianni E., Yanagisawa H., Yano K., Ye G., Yuan Z., Zerbini F. M., Zhang G., Zhang S., Zhang Y. -Z., Zhao L., and Okland A. L.

Abstract

In April 2023, following the annual International Committee on Taxonomy of Viruses (ICTV) ratification vote on newly proposed taxa, the phylum Negarnaviricota was amended and emended. The phylum was expanded by one new family, 14 new genera, and 140 new species. Two genera and 538 species were renamed. One species was moved, and four were abolished. This article presents the updated taxonomy of Negarnaviricota as now accepted by the ICTV

Published
2023

9. To become more sustainable organic agriculture needs genome editing technology

Author

FERNANDES, P. M. B., FAVARATTO, L., FERNANDES, A. A. R., VICIEN, C., CAPALBO, D. M. F., ZERBINI, F. M., PATRICIA MACHADO BUENO FERNANDES, UNIVERSIDADE FEDERAL DO ESPÍRITO SANTO, LUÍZA FAVARATTO, UNIVERSIDADE FEDERAL DO ESPÍRITO SANTO, ANTONIO ALBERTO RIBEIRO FERNANDES, UNIVERSIDADE FEDERAL DO ESPÍRITO SANTO, CARMEN VICIEN, UNIVERSIDAD DE BUENOS AIRES, DEISE MARIA FONTANA CAPALBO, CNPMA, and FRANCISCO MURILO ZERBINI, UNIVERSIDADE FEDERAL DE VIÇOSA.

Subjects
Segurança Alimentar, Agricultural biotechnology, Food security, Agricultura Orgânica, Biotecnologia, Organic production
Abstract

CRISPR technology offers the opportunity for partnership between biotechnology and organic agriculture to the mitigation of food insecurity, which may be one of the few ways to truly sustainable agriculture. Made available in DSpace on 2022-09-15T15:05:59Z (GMT). No. of bitstreams: 1 Capalbo-Become-sustainable-2022.pdf: 739431 bytes, checksum: 79e4c4e1c6e3ff5362c2a57ddfd39490 (MD5) Previous issue date: 2022

Published
2022

12. Assessing the diversity of whiteflies infesting cassava in Brazil

Author

Xavier, Cesar A.D., primary, Nogueira, Angélica Maria, additional, Bello, Vinicius Henrique, additional, Watanabe, Luís Fernando Maranho, additional, Barbosa, Tarsiane Mara Carneiro, additional, Alves Júnior, Miguel, additional, Barbosa, Leonardo, additional, Beserra-Júnior, José E.A., additional, Boari, Alessandra, additional, Calegario, Renata, additional, Gorayeb, Eduardo Silva, additional, Honorato Júnior, Jaime, additional, Koch, Gabriel, additional, Lima, Gaus Silvestre de Andrade, additional, Lopes, Cristian, additional, de Mello, Raquel Neves, additional, Pantoja, Késsia, additional, Silva, Fábio Nascimento, additional, Ramos Sobrinho, Roberto, additional, Santana, Enilton Nascimento, additional, da Silva, José Wilson Pereira, additional, Krause-Sakate, Renate, additional, and Zerbini, Francisco M., additional

Published
2021
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13. Molecular and biological characterization of a new Brazilian begomovirus, euphorbia yellow mosaic virus (EuYMV), infecting Euphorbia heterophylla plants

Author

Fernandes, Fernanda R., Albuquerque, Leonardo C., de Oliveira, Cristiane L., Cruz, Andréa R. R., da Rocha, Wesley B., Pereira, Talita G., Naito, Fernanda Y. B., Dias, Natália de M., Nagata, Tatsuya, Faria, Josias C., Zerbini, Francisco M., Aragão, Francisco J. L., and Inoue-Nagata, Alice K.

Published
2011
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30. Sustained NIK-mediated antiviral signalling confers broad-spectrum tolerance to begomoviruses in cultivated plants

Author

Brustolini, Otávio J.B., primary, Machado, Joao Paulo B., additional, Condori-Apfata, Jorge A., additional, Coco, Daniela, additional, Deguchi, Michihito, additional, Loriato, Virgílio A.P., additional, Pereira, Welison A., additional, Alfenas-Zerbini, Poliane, additional, Zerbini, Francisco M., additional, Inoue-Nagata, Alice K., additional, Santos, Anesia A., additional, Chory, Joanne, additional, Silva, Fabyano F., additional, and Fontes, Elizabeth P.B., additional

Published
2015
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31. European and brazilian examples on Sequiviridae family

Author

Renate Krause-Sakate, Jadao, A. S., Pavan, M. A., Zerbini, F. M., Thierry Candresse, Olivier Le Gall, Universidade Estadual Paulista Júlio de Mesquita Filho = São Paulo State University (UNESP), Universidade Federal de Vicosa (UFV), Génomique, développement et pouvoir pathogène (GD2P), and Université Bordeaux Segalen - Bordeaux 2-Institut National de la Recherche Agronomique (INRA)

Subjects
FAMILLE, [SDV]Life Sciences [q-bio], ComputingMilieux_MISCELLANEOUS, SEQUIVIRIDAE
Abstract

International audience

Published
2004

33. Situação atual das geminiviroses no Brasil

Author

FARIA, J. C., BEZERRA, I. C., ZERBINI, F. M., RIBEIRO, S. G., LIMA, M. F., JOSIAS CORREA DE FARIA, CNPAF, SIMONE DA GRACA RIBEIRO, CENARGEN, MIRTES FREITAS LIMA, CPATSA., F. MURILO ZERBINI, UFV, and ISABEL CRISTINA BEZERRA AGASIE, CNPH

Subjects
Geminiviridae, Brasil, Geminivirus, Begomoviridae
Abstract

Nesta revisão procurou-se cobrir aspectos relacionados à ocorrência, importância econômica, posição taxonômica dos geminivirus e medidas gerais de controle das doenças por eles causadas no Brasil. Made available in DSpace on 2013-03-22T23:30:33Z (GMT). No. of bitstreams: 1 Faria2.pdf: 1503184 bytes, checksum: 5fc3585fded2bb227fe3d52e5d64c73d (MD5) Previous issue date: 2000-09-13

Published
2000

37. Occurrence of geminivirus in tomato-producing areas in Submedio Sao Francisco

Author

BEZERRA, I. C., LIMA, M. F., RIBEIRO, S. G., GIORDANO, L. B., ZERBINI, F. M., AVILA, A. C., and MIRTES FREITAS LIMA, CPATSA.

Subjects
Ocorrencia, Tomate, Geminivirus, Submedio Sao Francisco, tomatoes
Abstract

This is the first report of geminivirus in Submedio Sao Francisco and reveals a wide dispersal of this virus that was previously described in the Federal District (1994) and state of Sao Paulo (1997), Minas Gerais (1996) and Bahia (1996). Made available in DSpace on 2018-08-11T00:37:59Z (GMT). No. of bitstreams: 1 FitopatologiaBrasileirav.22p.3311997.pdf: 156741 bytes, checksum: ba04acda358bb092c7410cfe70e5cef7 (MD5) Previous issue date: 1998-08-13 Suplemento. Edição dos Resumos do 30 Congresso Brasileiro de Fitopatologia, Poços de Caldas, 1997.

Published
1997

38. Sustained NIK-mediated antiviral signalling confers broadspectrum tolerance to begomoviruses in cultivated plants.

Author

Brustolini, Otávio J.B., Machado, Joao Paulo B., Condori‐Apfata, Jorge A., Coco, Daniela, Deguchi, Michihito, Loriato, Virgílio A.P., Pereira, Welison A., Alfenas‐Zerbini, Poliane, Zerbini, Francisco M., Inoue‐Nagata, Alice K., Santos, Anesia A., Chory, Joanne, Silva, Fabyano F., and Fontes, Elizabeth P.B.

Subjects
PLANT yields, TOMATO diseases & pests, BEGOMOVIRUSES, ANTIVIRAL agents, CELL communication, PATHOGENIC viruses
Abstract

Begomovirus-associated epidemics currently threaten tomato production worldwide due to the emergence of highly pathogenic virus species and the proliferation of a whitefly B biotype vector that is adapted to tomato. To generate an efficient defence against begomovirus, we modulated the activity of the immune defence receptor nuclear shuttle protein (NSP)-interacting kinase (NIK) in tomato plants; NIK is a virulence target of the begomovirus NSP during infection. Mutation of T474 within the kinase activation loop promoted the constitutive activation of NIK-mediated defences, resulting in the down-regulation of translation-related genes and the suppression of global translation. Consistent with these findings, transgenic lines harbouring an activating mutation (T474D) were tolerant to the tomato-infecting begomoviruses ToYSV and ToSRV. This phenotype was associated with reduced loading of coat protein viral mRNA in actively translating polysomes, lower infection efficiency and reduced accumulation of viral DNA in systemic leaves. Our results also add some relevant insights into the mechanism underlying the NIK-mediated defence. We observed that the mock-inoculated T474D-overexpressing lines showed a constitutively infected wild-type transcriptome, indicating that the activation of the NIKmediated signalling pathway triggers a typical response to begomovirus infection. In addition, the gain-of-function mutant T474D could sustain an activated NIK-mediated antiviral response in the absence of the virus, further confirming that phosphorylation of Thr-474 is the crucial event that leads to the activation of the kinase. [ABSTRACT FROM AUTHOR]

Published
2015
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41. DETECTION AND MOLECULAR CHARACTERIZATION OF AN ASTER YELLOWS GROUP PHYTOPLASMA ASSOCIATED WITH SOYBEAN AND EVIDENCE OF TWO NEW 16SrI SUBGROUPS IN CUBA.

Author

Acosta, K., Silva, F. N., Zamora, L., Quiñones, M., Martínez, R., Piñol, B., Urquiza, G. P. C., Carvalho, C. M., and Zerbini, F. M.

Subjects
SOYBEAN diseases & pests, PHYTOPLASMA diseases, CHLOROSIS (Plants), PHYLOGENY, RIBOSOMAL DNA
Abstract

An emerging soybean disease observed in Cuba was investigated in view of the possibility that a phytoplasma could be involved in its aetiology. Thirty-five soybean plants showing symptoms of stunting, chlorosis, crinkle and aborted seed pods were collected in Las Tunas and Holguin provinces during 2013, and analysed by nested-PCR with primers targeting the 16S ribosomal DNA (16S rDNA). Phytoplasmas were detected in 83% of symptomatic soybean plants. Conventional and virtual RFLP analyses of 16S rDNA sequences revealed the presence of strains of 'Candidatus Phytoplasma asteris' (16SrI group). Phytoplasmas belonging to ribosomal subgroup 16SrI-B and two putative new ribosomal subgroups 16SrI-W and 16SrI-Y were identified. Phylogenetic analysis corroborated the RFLP analyses, in which the Cuban strains formed a clade with representative sequences of the 16SrI group. 16SrI-B was the most prevalent subgroup (45% of positive samples) and mixed infections of different subgroups were observed (10% of the positive samples). The partial 16S rDNA sequences of three strains showed 99% nucleotide identity to several GenBank sequences of group 16SrI phytoplasmas, including a phytoplasma associated with a soybean disease in Brazil. This is the first report of a phytoplasma belonging to the 16SrI subgroup occurring in soybean in Cuba. [ABSTRACT FROM AUTHOR]

Published
2015

49. Genetic variability of badnaviruses infecting yam (Dioscoreaspp.) in northeastern Brazil

Author

Guimarães, Karla M. C., Silva, Sarah J. C., Melo, Aline M., Ramos-Sobrinho, Roberto, Lima, Joyce S., Zerbini, F. M., Assunção, Iraildes P., and Lima, Gaus S. A.

Abstract

Badnaviruses are dsDNA plant viruses that cause diseases in economically important crops in most tropical and subtropical regions of the world. In northeastern Brazil, badnaviruses are a serious constraint to yam crops. We assessed the genetic variability of badnaviruses infecting yam crops in northeastern Brazil, based on the sequence of the RT/RNAseH domain of 96 badnavirus isolates obtained between 2011 and 2012. Phylogenetic analysis revealed that Dioscorea bacilliform AL virus(DBALV) is the only badnavirus species infecting yam in the Brazilian northeast part. No evidence of recombination was found among DBALV isolates. Genetic variability of the DBALV population is high, with a mutation frequency on the order of 10−4, similar to those found for RNA viruses. We conclude that several mechanisms, including purifying selection and adaptation of the virus to the dioscorea species cultivation system, are important evolutionary processes in the genetic diversification of the DBALV population.

Published
2015
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50. Evaluation and modelling of helminth eggs removal in baffled and unbaffled ponds treating anaerobic effluent.

Author

Von Sperling, M., Chernicharo, C. A. L., Soares, A. M. E., and Zerbini, A. M.

Subjects
SEWAGE lagoons, UPFLOW anaerobic sludge blanket (UASB) reactor, ASCARIS lumbricoides, PARASITIC diseases, SEWAGE sludge, DATA modeling, MODEL-integrated computing, ANAEROBIC digestion, PREVENTION
Abstract

The paper evaluates and models helminth eggs removal in a combined UASB (Upflow Anaerobic Sludge Blanket) reactor -- maturation pond system (one baffled and one unbaffled pond in parallel). The system is comprised of demonstration-scale units, treating actual domestic sewage from Itabira city, Brazil. The paper addresses the following points: (i) removal of helminth eggs from the wastewater in the system; (ii) comparison of the observed removal efficiency with the predictions using the Ayres et al. model; (iii) accumulation of helminth eggs in the sludge; (iv) viability of eggs in the sludge; (v) distribution of helminth species in the sludge. The removal efficiency of helminth eggs from the wastewater in both ponds was 100% for most of the time (0 counts in the final effluent). The predictions of helminth eggs removal according to the Ayres et al. model can be considered reasonable. After one year of operation, 88% of the eggs in the sludge remained viable. Helminth eggs counts in the sludge tended to decrease along the baffled pond length (from first to last compartment). The prevailing helminth species found in the sludge from both ponds was Ascaris lumbricoides. [ABSTRACT FROM AUTHOR]

Published
2003
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