| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Milho e Sorgo. |
|
Data corrente: |
07/10/2013 |
|
Data da última atualização: |
28/09/2017 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
SOUZA, T. C. de; SOUZA, E. dos S.; DOUSSEAU, S.; CASTRO, E. M. de; MAGALHAES, P. C. |
|
Afiliação: |
PAULO CESAR MAGALHAES, CNPMS. |
|
Título: |
Seedlings of Garcinia brasiliensis (Clusiaceae) subjected to rootflooding: Physiological, morphoanatomical, and antioxidantresponses to the stress. |
|
Ano de publicação: |
2013 |
|
Fonte/Imprenta: |
Aquatic Botany, Amsterdam, v. 111, p. 43-49, 2013. |
|
DOI: |
10.1016/j.aquabot.2013.08.006 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Garcinia brasiliensis (Mart.) is a native Amazonian tree cultivated throughout Brazil. This plant can tolerate flooding or submergence for several days, during certain periods of the year. The morphophysiological changes of G. brasiliensis (Mart.) seedlings were assessed that may favor their survival in flooded environments. Seedlings with six fully expanded leaves were placed in tanks so that their roots were submerged for 90 days. Antioxidant enzymatic activity and the contents of H2O2, soluble sugar, starch, and amino acid of the roots were evaluated on six harvesting occasions. At the end of the experiment, the dry mass and root morphology of the seedlings were determined. Flooding lead to a decrease in dry mass of roots and aboveground parts, as well as root length (58%), surface area (51%) and volume (43%), especially of roots with smaller diameter. The roots of the flooded seedlings presented thicker exodermis and greater xylem number, thicker phloem and fewer xylem fibers. There was a small amount of aerenchyma in the roots and hypertrophied lenticels were detected at the base of the stem. Superoxide dismutase activity was significantly higher in flooded roots at all harvesting times, and ascorbate peroxidase and catalase activities were highest during the last two harvestings. H2O2 content increased after 40 and 55 days of flooding, followed by a drastic decrease. After 70 and 90 days of flooding there was an expressive increase in soluble sugars, and at 90 days, a reduction in starch content. No differences were observed in amino acid content. MenosGarcinia brasiliensis (Mart.) is a native Amazonian tree cultivated throughout Brazil. This plant can tolerate flooding or submergence for several days, during certain periods of the year. The morphophysiological changes of G. brasiliensis (Mart.) seedlings were assessed that may favor their survival in flooded environments. Seedlings with six fully expanded leaves were placed in tanks so that their roots were submerged for 90 days. Antioxidant enzymatic activity and the contents of H2O2, soluble sugar, starch, and amino acid of the roots were evaluated on six harvesting occasions. At the end of the experiment, the dry mass and root morphology of the seedlings were determined. Flooding lead to a decrease in dry mass of roots and aboveground parts, as well as root length (58%), surface area (51%) and volume (43%), especially of roots with smaller diameter. The roots of the flooded seedlings presented thicker exodermis and greater xylem number, thicker phloem and fewer xylem fibers. There was a small amount of aerenchyma in the roots and hypertrophied lenticels were detected at the base of the stem. Superoxide dismutase activity was significantly higher in flooded roots at all harvesting times, and ascorbate peroxidase and catalase activities were highest during the last two harvestings. H2O2 content increased after 40 and 55 days of flooding, followed by a drastic decrease. After 70 and 90 days of flooding there was an expressive increase in soluble sugars, and at 90 days, a ... Mostrar Tudo |
|
Palavras-Chave: |
Hipoxia; Rheedia brasiliensis. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/90582/1/Seedlings-Garcinia.pdf
|
|
Marc: |
LEADER 02265naa a2200205 a 4500
001 1967919
005 2017-09-28
008 2013 bl uuuu u00u1 u #d
024 7 $a10.1016/j.aquabot.2013.08.006$2DOI
100 1 $aSOUZA, T. C. de
245 $aSeedlings of Garcinia brasiliensis (Clusiaceae) subjected to rootflooding$bPhysiological, morphoanatomical, and antioxidantresponses to the stress.$h[electronic resource]
260 $c2013
520 $aGarcinia brasiliensis (Mart.) is a native Amazonian tree cultivated throughout Brazil. This plant can tolerate flooding or submergence for several days, during certain periods of the year. The morphophysiological changes of G. brasiliensis (Mart.) seedlings were assessed that may favor their survival in flooded environments. Seedlings with six fully expanded leaves were placed in tanks so that their roots were submerged for 90 days. Antioxidant enzymatic activity and the contents of H2O2, soluble sugar, starch, and amino acid of the roots were evaluated on six harvesting occasions. At the end of the experiment, the dry mass and root morphology of the seedlings were determined. Flooding lead to a decrease in dry mass of roots and aboveground parts, as well as root length (58%), surface area (51%) and volume (43%), especially of roots with smaller diameter. The roots of the flooded seedlings presented thicker exodermis and greater xylem number, thicker phloem and fewer xylem fibers. There was a small amount of aerenchyma in the roots and hypertrophied lenticels were detected at the base of the stem. Superoxide dismutase activity was significantly higher in flooded roots at all harvesting times, and ascorbate peroxidase and catalase activities were highest during the last two harvestings. H2O2 content increased after 40 and 55 days of flooding, followed by a drastic decrease. After 70 and 90 days of flooding there was an expressive increase in soluble sugars, and at 90 days, a reduction in starch content. No differences were observed in amino acid content.
653 $aHipoxia
653 $aRheedia brasiliensis
700 1 $aSOUZA, E. dos S.
700 1 $aDOUSSEAU, S.
700 1 $aCASTRO, E. M. de
700 1 $aMAGALHAES, P. C.
773 $tAquatic Botany, Amsterdam$gv. 111, p. 43-49, 2013.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Meio Ambiente. |
|
Data corrente: |
16/12/1993 |
|
Data da última atualização: |
16/12/1993 |
|
Autoria: |
BARROS, B. C.; KRUGNER, T. L.; VALARINI, P. J. |
|
Afiliação: |
EMBRAPA-CNPMA. |
|
Título: |
Efeito da infestacao de solo com Helminthosporium sativum P. K. e Berk. sobre o desenvolvimento de plantas de trigo (Triticum aestivum L.). |
|
Ano de publicação: |
1984 |
|
Fonte/Imprenta: |
Summa Phytopathologica, v.10, n.1/2, p.171-179, jan./jun. 1984. |
|
Idioma: |
Português |
|
Conteúdo: |
A importancia das podridoes de raiz do trigo causadas por Helminthosporium sativum, em nossas condicoes, ainda nao e bem conhecida. Sabe-se que a sua ocorrencia e frequente, mas, pela dificuldade de reconhecimento dos sintomas no campo, essa importancia pode estar sendo sub-estimada. Foi instalado um ensaio, em casa-de-vegetacao, com a finalidade de se avaliar os danos provocados pelo patogeno, sob os efeitos da esterilizacao do solo, com brometo de metila, e de tratamento de semente, com Neantina. As populacoes de fungos da semente foram eliminadas in vitro, pelo tratamento das sementes. este tratamento, no entanto, reduziu a emergencia das plantas. A infestacao artificial do solo com o patogeno, na epoca da semeadura, aumentou a intensidade dos sintomas naregiao da coroa da planta, ate a concentracao de conidios de 10 5/ml. A infestacao do solo provocou um incremento nos sintomas nas plantas desenvolvidas de semente tratadas e em solo tratado, havendo, contudo, um maior perfilhamento destas. |
|
Thesagro: |
Doença; Helminthosporium Sativum; Infestação; Solo; Trigo. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01634naa a2200205 a 4500
001 1011081
005 1993-12-16
008 1984 bl uuuu u00u1 u #d
100 1 $aBARROS, B. C.
245 $aEfeito da infestacao de solo com Helminthosporium sativum P. K. e Berk. sobre o desenvolvimento de plantas de trigo (Triticum aestivum L.).
260 $c1984
520 $aA importancia das podridoes de raiz do trigo causadas por Helminthosporium sativum, em nossas condicoes, ainda nao e bem conhecida. Sabe-se que a sua ocorrencia e frequente, mas, pela dificuldade de reconhecimento dos sintomas no campo, essa importancia pode estar sendo sub-estimada. Foi instalado um ensaio, em casa-de-vegetacao, com a finalidade de se avaliar os danos provocados pelo patogeno, sob os efeitos da esterilizacao do solo, com brometo de metila, e de tratamento de semente, com Neantina. As populacoes de fungos da semente foram eliminadas in vitro, pelo tratamento das sementes. este tratamento, no entanto, reduziu a emergencia das plantas. A infestacao artificial do solo com o patogeno, na epoca da semeadura, aumentou a intensidade dos sintomas naregiao da coroa da planta, ate a concentracao de conidios de 10 5/ml. A infestacao do solo provocou um incremento nos sintomas nas plantas desenvolvidas de semente tratadas e em solo tratado, havendo, contudo, um maior perfilhamento destas.
650 $aDoença
650 $aHelminthosporium Sativum
650 $aInfestação
650 $aSolo
650 $aTrigo
700 1 $aKRUGNER, T. L.
700 1 $aVALARINI, P. J.
773 $tSumma Phytopathologica$gv.10, n.1/2, p.171-179, jan./jun. 1984.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Meio Ambiente (CNPMA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
