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Registro Completo |
Biblioteca(s): |
Embrapa Agrossilvipastoril. |
Data corrente: |
02/03/2017 |
Data da última atualização: |
23/03/2018 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
POLTRONIERI, F.; IKEDA, F. S.; COSTA, W. B. da. |
Afiliação: |
FERNANDO POLTRONIERI, UFMT-SINOP; FERNANDA SATIE IKEDA, CPAMT; WANDERSON B. DA COSTA, UFMT-SINOP. |
Título: |
Potencial alelopático de compostos voláteis de cultivares de Panicum maximum jacq. sobre Lactuca sativa L.. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
In: JORNADA CIENTÍFICA DA EMBRAPA AGROSSILVIPASTORIL, 5., 2016, Sinop. Anais. Sinop, MT: Embrapa, 2017. p. 98-100. |
Idioma: |
Português |
Conteúdo: |
A supressão das plantas daninhas exercida pelas plantas de cobertura se deve a interferência que essas causam na comunidade infestante. Por interferência entende-se o somatório de competição por recursos do ambiente (espaço, luz, nutrientes, água etc.) e A alelopatia que algumas plantas de cobertura expressam. Tais substancias alelopáticas podem ser liberadas no meio por lixiviados ou compostos voláteis de folhas ou mesmo por exsudatos radiculares (CONSTANTIN, et al., 2011). As cultivares de P. maximum surgem como alternativa às cultivares de braquiárias (Urochloa spp.) na utilização como planta de cobertura ou mesmo em consórcio com milho (CORREIA et al., 2011) na segunda safra. Contudo há uma lacuna maior quanto a estudos referentes ao potencial alelopático de cultivares de P. maximum em relação às braquiárias. Por isso, o objetivo deste trabalho foi avaliar o potencial alelopático de compostos voláteis provenientes de folhas de cultivares de P.maximum sobre alface (L. sativa). |
Thesagro: |
Lactuca sativa; Panicum maximum. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/174493/1/2016-cpamt-ikeda-alelopatico-composto-volatil-cultivar-panicum-lcatuca-sativa-p98.pdf
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Marc: |
LEADER 01599nam a2200157 a 4500 001 2065698 005 2018-03-23 008 2017 bl uuuu u00u1 u #d 100 1 $aPOLTRONIERI, F. 245 $aPotencial alelopático de compostos voláteis de cultivares de Panicum maximum jacq. sobre Lactuca sativa L..$h[electronic resource] 260 $aIn: JORNADA CIENTÍFICA DA EMBRAPA AGROSSILVIPASTORIL, 5., 2016, Sinop. Anais. Sinop, MT: Embrapa, 2017. p. 98-100.$c2017 520 $aA supressão das plantas daninhas exercida pelas plantas de cobertura se deve a interferência que essas causam na comunidade infestante. Por interferência entende-se o somatório de competição por recursos do ambiente (espaço, luz, nutrientes, água etc.) e A alelopatia que algumas plantas de cobertura expressam. Tais substancias alelopáticas podem ser liberadas no meio por lixiviados ou compostos voláteis de folhas ou mesmo por exsudatos radiculares (CONSTANTIN, et al., 2011). As cultivares de P. maximum surgem como alternativa às cultivares de braquiárias (Urochloa spp.) na utilização como planta de cobertura ou mesmo em consórcio com milho (CORREIA et al., 2011) na segunda safra. Contudo há uma lacuna maior quanto a estudos referentes ao potencial alelopático de cultivares de P. maximum em relação às braquiárias. Por isso, o objetivo deste trabalho foi avaliar o potencial alelopático de compostos voláteis provenientes de folhas de cultivares de P.maximum sobre alface (L. sativa). 650 $aLactuca sativa 650 $aPanicum maximum 700 1 $aIKEDA, F. S. 700 1 $aCOSTA, W. B. da
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Embrapa Agrossilvipastoril (CPAMT) |
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia; Embrapa Semiárido. |
Data corrente: |
29/05/2023 |
Data da última atualização: |
23/05/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
MOREIRA, V. J. V.; PINHEIRO, D. H.; LOURENCO, I. T.; BASSO, M. F.; LISEI-DE-SA, M. E.; SILVA, M. C. M. da; DANCHIN, E. G. J.; GUIMARAES, P. M.; GRYNBERG, P.; BRASILEIRO, A. C. M.; MACEDO, L. L. P. de; MORGANTE, C. V.; ENGLER, J. de A.; SA, M. F. G. de. |
Afiliação: |
VALDEIR JUNIO VAZ MOREIRA, Biotechnology Center, PPGBCM, UFRGS; DANIELE HELOÍSA PINHEIRO, National Institute of Science and Technology; ISABELA TRISTAN LOURENCO TESSUTTI, Cenargen; MARCOS FERNANDO BASSO, National Institute of Science and Technology; MARIA E. LISEI-DE-SA, National Institute of Science and Technology; MARIA CRISTINA MATTAR DA SILVA, Cenargen; ETIENNE G. J. DANCHIN, National Institute of Science and Technology; PATRICIA MESSEMBERG GUIMARAES, Cenargen; PRISCILA GRYNBERG, Cenargen; ANA CRISTINA MIRANDA BRASILEIRO, Cenargen; LEONARDO LIMA PEPINO DE MACEDO, Cenargen; CAROLINA VIANNA MORGANTE, CPATSA; JANICE DE ALMEIDA ENGLER, National Institute of Science and Technology; MARIA FATIMA GROSSI DE SA, Cenargen. |
Título: |
In planta RNAi targeting Meloidogyne incognita Minc16803 gene perturbs nematode parasitism and reduces plant susceptibility. |
Ano de publicação: |
2024 |
Fonte/Imprenta: |
Journal of Pest Science, v. 97, p. 411-427, 2024. |
DOI: |
https://doi.org/10.1007/s10340-023-01623-7 |
Idioma: |
Inglês |
Conteúdo: |
Meloidogyne incognita is one of the most important plant-parasitic nematodes (PPNs) causing severe crop losses worldwide. Plants have evolved complex defense mechanisms to respond to PPNs attacks. Conversely, PPNs have evolved infection mechanisms that involve the secretion of effector proteins into host plants to suppress immune responses and facilitate para- sitism. Therefore, effector genes are attractive targets for the genetic improvement of plant resistance to M. incognita. In this study, we functionally characterized the Minc16803 (Minc3s00746g16803) putative effector gene to evaluate its role during plant-nematode interactions. First, we found that the Minc16803 gene is expressed in all nematode life stages and encodes a protein with an N-terminal signal peptide for secretion, a motif characteristic of effector proteins and with the absence of transmembrane domain. In addition, our data demonstrated that transgenic Arabidopsis thaliana lines overexpressing a Minc16803-dsRNA efficiently downregulated the Minc16803 transcripts in infecting nematodes. Furthermore, transgenic lines were significantly less susceptible to M. incognita compared to wild-type control plants. The number of galls per plant was reduced by up to 84%, while the number of egg masses per plant decreased by up to 93.3%. Moreover, galls and feed- ing sites in the roots of transgenic lines were smaller than those in the control plants. Histological analysis revealed giant cells without cytoplasm, disordered neighboring cells, and malformed maturing nematodes in transgenic galls. Curiously, numerous hatching ppJ2 juveniles were often observed near the female body within the transgenic root tissues before egg mass extrusion. All findings strongly suggest that Minc16803 gene is a promising target to engineer agricultural crops for M. incognita resistance through host-induced gene silencing. MenosMeloidogyne incognita is one of the most important plant-parasitic nematodes (PPNs) causing severe crop losses worldwide. Plants have evolved complex defense mechanisms to respond to PPNs attacks. Conversely, PPNs have evolved infection mechanisms that involve the secretion of effector proteins into host plants to suppress immune responses and facilitate para- sitism. Therefore, effector genes are attractive targets for the genetic improvement of plant resistance to M. incognita. In this study, we functionally characterized the Minc16803 (Minc3s00746g16803) putative effector gene to evaluate its role during plant-nematode interactions. First, we found that the Minc16803 gene is expressed in all nematode life stages and encodes a protein with an N-terminal signal peptide for secretion, a motif characteristic of effector proteins and with the absence of transmembrane domain. In addition, our data demonstrated that transgenic Arabidopsis thaliana lines overexpressing a Minc16803-dsRNA efficiently downregulated the Minc16803 transcripts in infecting nematodes. Furthermore, transgenic lines were significantly less susceptible to M. incognita compared to wild-type control plants. The number of galls per plant was reduced by up to 84%, while the number of egg masses per plant decreased by up to 93.3%. Moreover, galls and feed- ing sites in the roots of transgenic lines were smaller than those in the control plants. Histological analysis revealed giant cells without cytoplasm, disor... Mostrar Tudo |
Palavras-Chave: |
DsRNA; Host-induced gene silencing; Interações planta-nematóide; Nematoide das galhas; Plant-nematode interactions; Root-knot nematode. |
Thesagro: |
Meloidogyne Incognita; Nematóide; Parasito de Planta; Planta. |
Thesaurus NAL: |
Nematode biology; Nematode control; Plant parasitic nematodes. |
Categoria do assunto: |
-- O Insetos e Entomologia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/264479/1/In-planta-RNAi-targeting-Meloidogyne-incognita-Minc16803-gene-perturbs-nematode-parasitism-and-reduces-plant-susceptibility.pdf
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Marc: |
LEADER 03269naa a2200445 a 4500 001 2154064 005 2024-05-23 008 2024 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1007/s10340-023-01623-7$2DOI 100 1 $aMOREIRA, V. J. V. 245 $aIn planta RNAi targeting Meloidogyne incognita Minc16803 gene perturbs nematode parasitism and reduces plant susceptibility.$h[electronic resource] 260 $c2024 520 $aMeloidogyne incognita is one of the most important plant-parasitic nematodes (PPNs) causing severe crop losses worldwide. Plants have evolved complex defense mechanisms to respond to PPNs attacks. Conversely, PPNs have evolved infection mechanisms that involve the secretion of effector proteins into host plants to suppress immune responses and facilitate para- sitism. Therefore, effector genes are attractive targets for the genetic improvement of plant resistance to M. incognita. In this study, we functionally characterized the Minc16803 (Minc3s00746g16803) putative effector gene to evaluate its role during plant-nematode interactions. First, we found that the Minc16803 gene is expressed in all nematode life stages and encodes a protein with an N-terminal signal peptide for secretion, a motif characteristic of effector proteins and with the absence of transmembrane domain. In addition, our data demonstrated that transgenic Arabidopsis thaliana lines overexpressing a Minc16803-dsRNA efficiently downregulated the Minc16803 transcripts in infecting nematodes. Furthermore, transgenic lines were significantly less susceptible to M. incognita compared to wild-type control plants. The number of galls per plant was reduced by up to 84%, while the number of egg masses per plant decreased by up to 93.3%. Moreover, galls and feed- ing sites in the roots of transgenic lines were smaller than those in the control plants. Histological analysis revealed giant cells without cytoplasm, disordered neighboring cells, and malformed maturing nematodes in transgenic galls. Curiously, numerous hatching ppJ2 juveniles were often observed near the female body within the transgenic root tissues before egg mass extrusion. All findings strongly suggest that Minc16803 gene is a promising target to engineer agricultural crops for M. incognita resistance through host-induced gene silencing. 650 $aNematode biology 650 $aNematode control 650 $aPlant parasitic nematodes 650 $aMeloidogyne Incognita 650 $aNematóide 650 $aParasito de Planta 650 $aPlanta 653 $aDsRNA 653 $aHost-induced gene silencing 653 $aInterações planta-nematóide 653 $aNematoide das galhas 653 $aPlant-nematode interactions 653 $aRoot-knot nematode 700 1 $aPINHEIRO, D. H. 700 1 $aLOURENCO, I. T. 700 1 $aBASSO, M. F. 700 1 $aLISEI-DE-SA, M. E. 700 1 $aSILVA, M. C. M. da 700 1 $aDANCHIN, E. G. J. 700 1 $aGUIMARAES, P. M. 700 1 $aGRYNBERG, P. 700 1 $aBRASILEIRO, A. C. M. 700 1 $aMACEDO, L. L. P. de 700 1 $aMORGANTE, C. V. 700 1 $aENGLER, J. de A. 700 1 $aSA, M. F. G. de 773 $tJournal of Pest Science$gv. 97, p. 411-427, 2024.
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