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Registro completo
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Biblioteca (s) : |
INIA Treinta y Tres. |
Fecha : |
23/07/2020 |
Actualizado : |
23/07/2020 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
GUIDO, A.; QUIÑONES, A.; PEREIRA, A.L.; SILVA, E.R. DA |
Afiliación : |
ANACLARA GUIDO BOLIOLI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; AMPARO QUIÑONES DELLEPIANE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ANA LAURA PEREIRA AMATO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ELIANE REGINA DA SILVA, Universidade Federal do Río Grande do Sul, Instituto de Biociencias, Depto. de botanica. Porto Alegre, RS, Brazil. |
Título : |
Are the invasive grasses Cynodon dactylon and Eragrostis plana more phytotoxic than a co-occurring native? [¿Las gramíneas invasoras Cynodon dactylon y Eragrostis plana son más fitotóxicas que una nativa coexistente?]. |
Fecha de publicación : |
2020 |
Fuente / Imprenta : |
Ecología Austral, Agosto 2020, v. 30, p. 295-303. |
Idioma : |
Inglés |
Notas : |
History article: Recibido: 12 de Diciembre de 2019//Aceptado: 27 de Abril de 2020. |
Contenido : |
ABSTRACT. Allelopathy, the release of phytotoxins by plants, may be a key mechanism by which an invasive species displaces residents. However, methodological procedures are still questioned in the literature. We evaluated the phytotoxic effects of Cynodon dactylon and Eragrostis plana, the most invasive grasses of the Río de la Plata grasslands. Although allelopathy has been claimed as one of the possible mechanisms involved in the establishment and impact of these species, no empirical evidence has convincingly supported it. We performed a germination experiment to assess the effect of both invasive species on Eragrostis bahiensis, a native grass from the region. We used aqueous extracts from fresh and dry leaves of three donor species: two invasive (C. dactylon and E. plana) and one co-occurring native from the introduced range (Coelorachis selloana). This approach allows to relativize the invasive species effect from resident species, according to the novel weapon hypothesis. As a result, only aqueous extracts from dried leaves inhibited the germination and early growth of E. bahiensis. The magnitude of these effects varied between donor species, but there was no consensus to conclude both invasive species had greater effects. Cynodon dactylon caused the strongest inhibitory effect on E. bahiensis. However, the native C. selloana also presented a potent inhibitory effect, stronger than the well-known invasive E. plana. Thus, the role of allelopathy on E. plana invasion in the Río de la Plata grasslands should be questioned. Finally, we addressed some suggestions for improving experimental design for testing the novelty of phytotoxic effects in the introduced range. MenosABSTRACT. Allelopathy, the release of phytotoxins by plants, may be a key mechanism by which an invasive species displaces residents. However, methodological procedures are still questioned in the literature. We evaluated the phytotoxic effects of Cynodon dactylon and Eragrostis plana, the most invasive grasses of the Río de la Plata grasslands. Although allelopathy has been claimed as one of the possible mechanisms involved in the establishment and impact of these species, no empirical evidence has convincingly supported it. We performed a germination experiment to assess the effect of both invasive species on Eragrostis bahiensis, a native grass from the region. We used aqueous extracts from fresh and dry leaves of three donor species: two invasive (C. dactylon and E. plana) and one co-occurring native from the introduced range (Coelorachis selloana). This approach allows to relativize the invasive species effect from resident species, according to the novel weapon hypothesis. As a result, only aqueous extracts from dried leaves inhibited the germination and early growth of E. bahiensis. The magnitude of these effects varied between donor species, but there was no consensus to conclude both invasive species had greater effects. Cynodon dactylon caused the strongest inhibitory effect on E. bahiensis. However, the native C. selloana also presented a potent inhibitory effect, stronger than the well-known invasive E. plana. Thus, the role of allelopathy on E. plana invasion in... Presentar Todo |
Palabras claves : |
BERMUDAGRASS; CAPIM ANNONI; FITOTOXINAS; GRAMILLA; INVASION; LOVEGRASS; PASTIZALES DEL RIO DE LA PLATA; PHYTOTOXINS; RIO DE LA PLATA GRASSLANDS. |
Asunto categoría : |
H60 Malezas y escardas |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/14556/1/Guido-2020.pdf
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Marc : |
LEADER 02683naa a2200277 a 4500 001 1061234 005 2020-07-23 008 2020 bl uuuu u00u1 u #d 100 1 $aGUIDO, A. 245 $aAre the invasive grasses Cynodon dactylon and Eragrostis plana more phytotoxic than a co-occurring native? [¿Las gramíneas invasoras Cynodon dactylon y Eragrostis plana son más fitotóxicas que una nativa coexistente?].$h[electronic resource] 260 $c2020 500 $aHistory article: Recibido: 12 de Diciembre de 2019//Aceptado: 27 de Abril de 2020. 520 $aABSTRACT. Allelopathy, the release of phytotoxins by plants, may be a key mechanism by which an invasive species displaces residents. However, methodological procedures are still questioned in the literature. We evaluated the phytotoxic effects of Cynodon dactylon and Eragrostis plana, the most invasive grasses of the Río de la Plata grasslands. Although allelopathy has been claimed as one of the possible mechanisms involved in the establishment and impact of these species, no empirical evidence has convincingly supported it. We performed a germination experiment to assess the effect of both invasive species on Eragrostis bahiensis, a native grass from the region. We used aqueous extracts from fresh and dry leaves of three donor species: two invasive (C. dactylon and E. plana) and one co-occurring native from the introduced range (Coelorachis selloana). This approach allows to relativize the invasive species effect from resident species, according to the novel weapon hypothesis. As a result, only aqueous extracts from dried leaves inhibited the germination and early growth of E. bahiensis. The magnitude of these effects varied between donor species, but there was no consensus to conclude both invasive species had greater effects. Cynodon dactylon caused the strongest inhibitory effect on E. bahiensis. However, the native C. selloana also presented a potent inhibitory effect, stronger than the well-known invasive E. plana. Thus, the role of allelopathy on E. plana invasion in the Río de la Plata grasslands should be questioned. Finally, we addressed some suggestions for improving experimental design for testing the novelty of phytotoxic effects in the introduced range. 653 $aBERMUDAGRASS 653 $aCAPIM ANNONI 653 $aFITOTOXINAS 653 $aGRAMILLA 653 $aINVASION 653 $aLOVEGRASS 653 $aPASTIZALES DEL RIO DE LA PLATA 653 $aPHYTOTOXINS 653 $aRIO DE LA PLATA GRASSLANDS 700 1 $aQUIÑONES, A. 700 1 $aPEREIRA, A.L. 700 1 $aSILVA, E.R. DA 773 $tEcología Austral, Agosto 2020$gv. 30, p. 295-303.
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INIA Treinta y Tres (TT) |
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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha actual : |
05/05/2017 |
Actualizado : |
24/06/2021 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
A - 2 |
Autor : |
OLINDA, R. G.; MAIA, L. A.; CARGNELUTTI, J. F.; GOIS, R. C. S.; BATISTA, J. S.; DANTAS, A. F. M.; FLORES, E. F.; RIET-CORREA, F. |
Afiliación : |
FRANKLIN RIET-CORREA AMARAL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.//Programa de Pós-Graduação, em Medicina Veterinária, Hospital Veterinário, Centro de Saúde e Tecnologia Rural, Universidade Federal de Campina Grande (UFCG), Brasil. |
Título : |
Swinepox dermatitis in backyard pigs in Northeastern Brazil. |
Fecha de publicación : |
2016 |
Fuente / Imprenta : |
Pesquisa Veterinária Brasileira, Brasília, DF v. 36, n. 6, p. 468-472, 2016. |
DOI : |
10.1590/S0100-736X2016000600002 |
Idioma : |
Inglés |
Notas : |
Article History:Received on June 11, 2015.//Accepted for publication on March 23, 2016. OPEN ACCESS |
Contenido : |
This article describes five outbreaks of swinepox in backyard pigs in Northeastern Brazil. It affected backyard pigs from herds of poor hygienic-sanitary conditions with severe fly and lice infestations. The morbidity ranged from 33.3 to 100% among affected herds, with mortality reaching up to 60%. The affected pigs developed multifocal to coalescent gray to white papules and blisters in the skin, with eventual eruptions, evolving to erosions and crusts. In addition to skin lesions, affected piglets presented apathy, anorexia and fever. The disease was auto-limiting, resolving within 15 to 25 days. Histological examination revealed proliferative and ulcerative vesiculopustular dermatitis with ballooning degeneration of epithelial cells, perivascular inflammatory infiltrates of lymphocytes, plasma cells, neutrophils, eosinophils and some macrophages in the dermis. Intracytoplasmic eosinophilic inclusions were consistently observed in keratinocytes. Total DNA extracted from fresh tissue fragments obtained from one outbreak and formalin-fixed, paraffin-embedded (FFPE) tissue from the other four outbreaks was submitted to polymerase chain reaction (PCR) for Swinepox virus (SWPV) and Vaccinia virus (VACV). Genetic SWPV material was identified by PCR in fresh material from one outbreak. Nucleotide sequencing and phylogenetic analysis of the PCR amplicons (viral polymerase gene) demonstrated 100% homology with sequences from SWPV. All tissues were PCR negative for VACV. Swine poxvirus is present in backyard pigs in Northeastern Brazil, indicating the need of including SWPV in the differential diagnosis of dermatitis in pigs. MenosThis article describes five outbreaks of swinepox in backyard pigs in Northeastern Brazil. It affected backyard pigs from herds of poor hygienic-sanitary conditions with severe fly and lice infestations. The morbidity ranged from 33.3 to 100% among affected herds, with mortality reaching up to 60%. The affected pigs developed multifocal to coalescent gray to white papules and blisters in the skin, with eventual eruptions, evolving to erosions and crusts. In addition to skin lesions, affected piglets presented apathy, anorexia and fever. The disease was auto-limiting, resolving within 15 to 25 days. Histological examination revealed proliferative and ulcerative vesiculopustular dermatitis with ballooning degeneration of epithelial cells, perivascular inflammatory infiltrates of lymphocytes, plasma cells, neutrophils, eosinophils and some macrophages in the dermis. Intracytoplasmic eosinophilic inclusions were consistently observed in keratinocytes. Total DNA extracted from fresh tissue fragments obtained from one outbreak and formalin-fixed, paraffin-embedded (FFPE) tissue from the other four outbreaks was submitted to polymerase chain reaction (PCR) for Swinepox virus (SWPV) and Vaccinia virus (VACV). Genetic SWPV material was identified by PCR in fresh material from one outbreak. Nucleotide sequencing and phylogenetic analysis of the PCR amplicons (viral polymerase gene) demonstrated 100% homology with sequences from SWPV. All tissues were PCR negative for VACV. Swine poxvi... Presentar Todo |
Palabras claves : |
Doença viral. |
Thesagro : |
Dermatite; Dermatitis; Poxviridae; Suíno; Swine; Varíola; Viral diseases of animals and humans. |
Asunto categoría : |
-- |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/6764/1/Pesq.-Vet.-Bras.-366p.468-472-2016.pdf
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Marc : |
LEADER 02654naa a2200325 a 4500 001 1057176 005 2021-06-24 008 2016 bl uuuu u00u1 u #d 024 7 $a10.1590/S0100-736X2016000600002$2DOI 100 1 $aOLINDA, R. G. 245 $aSwinepox dermatitis in backyard pigs in Northeastern Brazil.$h[electronic resource] 260 $c2016 500 $aArticle History:Received on June 11, 2015.//Accepted for publication on March 23, 2016. OPEN ACCESS 520 $aThis article describes five outbreaks of swinepox in backyard pigs in Northeastern Brazil. It affected backyard pigs from herds of poor hygienic-sanitary conditions with severe fly and lice infestations. The morbidity ranged from 33.3 to 100% among affected herds, with mortality reaching up to 60%. The affected pigs developed multifocal to coalescent gray to white papules and blisters in the skin, with eventual eruptions, evolving to erosions and crusts. In addition to skin lesions, affected piglets presented apathy, anorexia and fever. The disease was auto-limiting, resolving within 15 to 25 days. Histological examination revealed proliferative and ulcerative vesiculopustular dermatitis with ballooning degeneration of epithelial cells, perivascular inflammatory infiltrates of lymphocytes, plasma cells, neutrophils, eosinophils and some macrophages in the dermis. Intracytoplasmic eosinophilic inclusions were consistently observed in keratinocytes. Total DNA extracted from fresh tissue fragments obtained from one outbreak and formalin-fixed, paraffin-embedded (FFPE) tissue from the other four outbreaks was submitted to polymerase chain reaction (PCR) for Swinepox virus (SWPV) and Vaccinia virus (VACV). Genetic SWPV material was identified by PCR in fresh material from one outbreak. Nucleotide sequencing and phylogenetic analysis of the PCR amplicons (viral polymerase gene) demonstrated 100% homology with sequences from SWPV. All tissues were PCR negative for VACV. Swine poxvirus is present in backyard pigs in Northeastern Brazil, indicating the need of including SWPV in the differential diagnosis of dermatitis in pigs. 650 $aDermatite 650 $aDermatitis 650 $aPoxviridae 650 $aSuíno 650 $aSwine 650 $aVaríola 650 $aViral diseases of animals and humans 653 $aDoença viral 700 1 $aMAIA, L. A. 700 1 $aCARGNELUTTI, J. F. 700 1 $aGOIS, R. C. S. 700 1 $aBATISTA, J. S. 700 1 $aDANTAS, A. F. M. 700 1 $aFLORES, E. F. 700 1 $aRIET-CORREA, F. 773 $tPesquisa Veterinária Brasileira, Brasília, DF$gv. 36, n. 6, p. 468-472, 2016.
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