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Registro Completo |
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Biblioteca(s): |
Embrapa Uva e Vinho. |
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Data corrente: |
17/11/2011 |
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Data da última atualização: |
09/05/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SPÓSITO, M. B.; AMORIM, L.; BASSANEZI, R. B.; YAMAMOTO, P.; FELIPPE, M. R.; CZERMAINSKI, A. B. C. |
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Afiliação: |
MARCEL B. SPÓSITO, FUNDECITRUS; LILIAN AMORIM, ESALQ/USP; RENATO B. BASSANEZI, FUNDECITRUS; PEDRO YAMAMOTO, FUNDECITRUS; MARCOS R. FELIPPE, FUNDECITRUS; ANA BEATRIZ COSTA CZERMAINSKI, CNPUV. |
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Título: |
Relative importance of inoculum sources of Guignardia citricarpa on the citrus black spot epidemic in Brazil. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Crop Protection, Surrey, v. 30, n. 12, p. 1546-1552, 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
Guignardia citricarpa, the causal agent of citrus black spot (CBS), forms ascospores and conidia in citrus leaf litter and only conidia on fruit and twigs. The objective of this work was to determine the relative importance of inoculum sources of ascospores and conidia in the progress of CBS under natural conditions in Brazil. A first experiment was conducted in an orchard subdivided into two areas. In one area, fallen leaves were removed and in the other area fallen leaves were maintained. In each area, two treatments were established: 1) CBS symptomatic mature fruit remained on the trees after the new fruit set, and 2) CBS symptomatic mature fruit were harvested before the new fruit set. A second experiment was carried out in a CBS-free experimental orchard where detached symptomatic fruit and leaf litter on the orchard floor and detached symptomatic fruit and dead twigs on the tree canopy were distributed to investigate the spread of disease. In the first experiment disease incidence was similar for all treatments in all years. However, in 2003, in the area without leaf litter (absence of the ascospores source), disease intensity and the rate of progress of disease incidence were higher when there was overlap of mature and young fruit. In the second experiment, only detached symptomatic fruit and dead twigs on the tree canopy were able to spread CBS in two years of the experiment. The distance of disease spread was less than 80 cm from these inoculum sources. The removal of fallen leaves was not sufficient to completely suppress the disease because of the presence of conidia in fruit and dead twigs. Therefore the reduction of conidia sources should be considered in CBS management in Brazil. MenosGuignardia citricarpa, the causal agent of citrus black spot (CBS), forms ascospores and conidia in citrus leaf litter and only conidia on fruit and twigs. The objective of this work was to determine the relative importance of inoculum sources of ascospores and conidia in the progress of CBS under natural conditions in Brazil. A first experiment was conducted in an orchard subdivided into two areas. In one area, fallen leaves were removed and in the other area fallen leaves were maintained. In each area, two treatments were established: 1) CBS symptomatic mature fruit remained on the trees after the new fruit set, and 2) CBS symptomatic mature fruit were harvested before the new fruit set. A second experiment was carried out in a CBS-free experimental orchard where detached symptomatic fruit and leaf litter on the orchard floor and detached symptomatic fruit and dead twigs on the tree canopy were distributed to investigate the spread of disease. In the first experiment disease incidence was similar for all treatments in all years. However, in 2003, in the area without leaf litter (absence of the ascospores source), disease intensity and the rate of progress of disease incidence were higher when there was overlap of mature and young fruit. In the second experiment, only detached symptomatic fruit and dead twigs on the tree canopy were able to spread CBS in two years of the experiment. The distance of disease spread was less than 80 cm from these inoculum sources. The removal ... Mostrar Tudo |
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Palavras-Chave: |
Brasil. |
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Thesagro: |
Doença de planta; Epidemiologia; Fruta cítrica; Fruticultura; Manejo. |
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Thesaurus Nal: |
Guignardia citricarpa. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/46862/1/SPOSITO-CropProtection-v30n12p1546-2011.pdf
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Marc: |
LEADER 02504naa a2200265 a 4500
001 1906208
005 2019-05-09
008 2011 bl uuuu u00u1 u #d
100 1 $aSPÓSITO, M. B.
245 $aRelative importance of inoculum sources of Guignardia citricarpa on the citrus black spot epidemic in Brazil.$h[electronic resource]
260 $c2011
520 $aGuignardia citricarpa, the causal agent of citrus black spot (CBS), forms ascospores and conidia in citrus leaf litter and only conidia on fruit and twigs. The objective of this work was to determine the relative importance of inoculum sources of ascospores and conidia in the progress of CBS under natural conditions in Brazil. A first experiment was conducted in an orchard subdivided into two areas. In one area, fallen leaves were removed and in the other area fallen leaves were maintained. In each area, two treatments were established: 1) CBS symptomatic mature fruit remained on the trees after the new fruit set, and 2) CBS symptomatic mature fruit were harvested before the new fruit set. A second experiment was carried out in a CBS-free experimental orchard where detached symptomatic fruit and leaf litter on the orchard floor and detached symptomatic fruit and dead twigs on the tree canopy were distributed to investigate the spread of disease. In the first experiment disease incidence was similar for all treatments in all years. However, in 2003, in the area without leaf litter (absence of the ascospores source), disease intensity and the rate of progress of disease incidence were higher when there was overlap of mature and young fruit. In the second experiment, only detached symptomatic fruit and dead twigs on the tree canopy were able to spread CBS in two years of the experiment. The distance of disease spread was less than 80 cm from these inoculum sources. The removal of fallen leaves was not sufficient to completely suppress the disease because of the presence of conidia in fruit and dead twigs. Therefore the reduction of conidia sources should be considered in CBS management in Brazil.
650 $aGuignardia citricarpa
650 $aDoença de planta
650 $aEpidemiologia
650 $aFruta cítrica
650 $aFruticultura
650 $aManejo
653 $aBrasil
700 1 $aAMORIM, L.
700 1 $aBASSANEZI, R. B.
700 1 $aYAMAMOTO, P.
700 1 $aFELIPPE, M. R.
700 1 $aCZERMAINSKI, A. B. C.
773 $tCrop Protection, Surrey$gv. 30, n. 12, p. 1546-1552, 2011.
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Registro original: |
Embrapa Uva e Vinho (CNPUV) |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
30/04/2014 |
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Data da última atualização: |
29/05/2017 |
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Autoria: |
MONTEIRO, J. G.; CRUZ, F. J. R.; NARDIN, M. B.; SANTOS, D. M. M. dos. |
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Título: |
Crescimento e conteúdo de prolina em plântulas de guandu submetidas a estresse osmótico e à putrescina exógena. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Pesquisa agropecuária brasileira, Brasília, DF, v. 49, n. 1, p. 18-25, jan. 2014. |
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Idioma: |
Português |
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Notas: |
Título em inglês: Growth and proline content in pigeon pea seedlings subjected to osmotic stress and to exogenous putrescine. |
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Conteúdo: |
O objetivo deste trabalho foi verificar o efeito da aplicação da poliamina putrescina no acúmulo de prolina e no crescimento inicial de plântulas de guandu cultivadas sob estresse hídrico ou salino, e avaliar se esta poliamina pode ser usada como atenuadora desses estresses. Sementes de duas cultivares de guandu, BRS Mandarim e Caqui, foram germinadas em caixas gerbox forradas com papel de filtro umedecido com 0,0, -0,2, -0,3, -0,4, -0,5 MPa de PEG 6000 ou 0, 20, 40, 60, 80 e 120 mmol L-1 de NaCl, na ausência (0 mmol L-1) ou na presença (0,5 mmol L-1) de putrescina. Utilizou-se o delineamento inteiramente casualizado, em arranjo fatorial 2x5x2 e 2x6x2 (duas cultivares, cinco níveis de deficiência hídrica ou seis níveis de estresse salino, e presença ou ausência de putrescina), com quatro repetições. O crescimento das plântulas é acentuadamente reduzido pelas condições de restrição hídrica e salinidade. A putrescina exógena incrementa, sob ambos os estresses, os teores de prolina nas plântulas de guandu, especialmente na cultivar BRS Mandarin, e atenua os efeitos da deficiência hídrica moderada nas cultivares estudadas. Os estresses de restrição hídrica e de salinidade causam acúmulo de prolina na parte aérea e nas raízes de ambas as cultivares. A prolina pode ser considerada um bom indicador bioquímico e fisiológico desses estresses em plântulas de guandu. |
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Palavras-Chave: |
Indicador bioquímico; Poliamina; Restrição hídrica; Soluto compatível. |
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Thesagro: |
Cajanus cajan; Salinidade. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/101700/1/Crescimento-e-conteudo-de-prolina.pdf
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Marc: |
LEADER 02273naa a2200241 a 4500
001 1985431
005 2017-05-29
008 2014 bl uuuu u00u1 u #d
100 1 $aMONTEIRO, J. G.
245 $aCrescimento e conteúdo de prolina em plântulas de guandu submetidas a estresse osmótico e à putrescina exógena.
260 $c2014
500 $aTítulo em inglês: Growth and proline content in pigeon pea seedlings subjected to osmotic stress and to exogenous putrescine.
520 $aO objetivo deste trabalho foi verificar o efeito da aplicação da poliamina putrescina no acúmulo de prolina e no crescimento inicial de plântulas de guandu cultivadas sob estresse hídrico ou salino, e avaliar se esta poliamina pode ser usada como atenuadora desses estresses. Sementes de duas cultivares de guandu, BRS Mandarim e Caqui, foram germinadas em caixas gerbox forradas com papel de filtro umedecido com 0,0, -0,2, -0,3, -0,4, -0,5 MPa de PEG 6000 ou 0, 20, 40, 60, 80 e 120 mmol L-1 de NaCl, na ausência (0 mmol L-1) ou na presença (0,5 mmol L-1) de putrescina. Utilizou-se o delineamento inteiramente casualizado, em arranjo fatorial 2x5x2 e 2x6x2 (duas cultivares, cinco níveis de deficiência hídrica ou seis níveis de estresse salino, e presença ou ausência de putrescina), com quatro repetições. O crescimento das plântulas é acentuadamente reduzido pelas condições de restrição hídrica e salinidade. A putrescina exógena incrementa, sob ambos os estresses, os teores de prolina nas plântulas de guandu, especialmente na cultivar BRS Mandarin, e atenua os efeitos da deficiência hídrica moderada nas cultivares estudadas. Os estresses de restrição hídrica e de salinidade causam acúmulo de prolina na parte aérea e nas raízes de ambas as cultivares. A prolina pode ser considerada um bom indicador bioquímico e fisiológico desses estresses em plântulas de guandu.
650 $aCajanus cajan
650 $aSalinidade
653 $aIndicador bioquímico
653 $aPoliamina
653 $aRestrição hídrica
653 $aSoluto compatível
700 1 $aCRUZ, F. J. R.
700 1 $aNARDIN, M. B.
700 1 $aSANTOS, D. M. M. dos
773 $tPesquisa agropecuária brasileira, Brasília, DF$gv. 49, n. 1, p. 18-25, jan. 2014.
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Embrapa Unidades Centrais (AI-SEDE) |
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