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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
14/06/2019 |
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Data da última atualização: |
02/12/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
DANTAS, B. F.; MATIAS, J. R.; LOPES. A. P.; ARAGÃO, C. A. |
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Afiliação: |
BARBARA FRANCA DANTAS, CPATSA; JANETE RODRIGUES MATIAS; ARMANDO PEREIRA LOPES; CARLOS ALBERTO ARAGÃO. |
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Título: |
Physiological changes in seeds and seedlings of pumpkins submitted to salt stress. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Bioscience Journal, Uberlândia, v. 35, n. 3, p. 763-774, 2019. |
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DOI: |
10.14393/BJ-v35n3a2019-41887 |
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Idioma: |
Inglês |
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Conteúdo: |
Salinity is one of the most limiting environmental factors for plant growth in semi-arid regions.Excessofsalts reduces water potential, causes physiological drought and can influence germination and initial growth of plants. The objective of this work was to study physiological and metabolic changes in seeds and seedlings of pumpkin (Cucurbita pepo cultivars Caserta and Redonda and C. maxima cv. Coroa)in a saline condition of salt stress. Thus, we it was quantified germination parameters; seedlings growth; seeds and seedlings respiration; degradation of total soluble sugars, reducing sugars and total proteins in cotyledons and the activity ascorbate peroxidase (APX), glutathione-S-transferase (GST) and catalase (CAT) during germination and initial growth of the pumpkin species studied in saline conditions. The experimental design was totally randomized in a factorial scheme 6x3, with six electrical conductivities (0; 2; 4; 6; 8 e 10 dS.m-1) and three cultivars (Redonda, Caserta and Coroa). Salinity did not influence the rate of seed respiration during the germination, although seedlings respiration decreased, as well as its vigour. Total sugars were degraded, while there was accumulation of reducing sugars and proteins in cotyledons of germinating seeds in salt solutions. Increased electrical conductivity reduced APX activity in the embryo and CAT in cotyledons, but did not influence GST. Pumpkin seedlings showed low tolerance to salt stress |
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Palavras-Chave: |
Estresse salino. |
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Thesagro: |
Abóbora; Condutividade Eletrica; Cucúrbita Máxima; Cucúrbita Pepo; Cucurbitaceae; Hortaliça Cucurbitácea; Salinidade; Semente. |
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Thesaurus Nal: |
Cucurbita; Pumpkins. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/198566/1/Dantas-et-al-2019-Bioscience-J.pdf
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Marc: |
LEADER 02333naa a2200301 a 4500
001 2109869
005 2019-12-02
008 2019 bl uuuu u00u1 u #d
024 7 $a10.14393/BJ-v35n3a2019-41887$2DOI
100 1 $aDANTAS, B. F.
245 $aPhysiological changes in seeds and seedlings of pumpkins submitted to salt stress.$h[electronic resource]
260 $c2019
520 $aSalinity is one of the most limiting environmental factors for plant growth in semi-arid regions.Excessofsalts reduces water potential, causes physiological drought and can influence germination and initial growth of plants. The objective of this work was to study physiological and metabolic changes in seeds and seedlings of pumpkin (Cucurbita pepo cultivars Caserta and Redonda and C. maxima cv. Coroa)in a saline condition of salt stress. Thus, we it was quantified germination parameters; seedlings growth; seeds and seedlings respiration; degradation of total soluble sugars, reducing sugars and total proteins in cotyledons and the activity ascorbate peroxidase (APX), glutathione-S-transferase (GST) and catalase (CAT) during germination and initial growth of the pumpkin species studied in saline conditions. The experimental design was totally randomized in a factorial scheme 6x3, with six electrical conductivities (0; 2; 4; 6; 8 e 10 dS.m-1) and three cultivars (Redonda, Caserta and Coroa). Salinity did not influence the rate of seed respiration during the germination, although seedlings respiration decreased, as well as its vigour. Total sugars were degraded, while there was accumulation of reducing sugars and proteins in cotyledons of germinating seeds in salt solutions. Increased electrical conductivity reduced APX activity in the embryo and CAT in cotyledons, but did not influence GST. Pumpkin seedlings showed low tolerance to salt stress
650 $aCucurbita
650 $aPumpkins
650 $aAbóbora
650 $aCondutividade Eletrica
650 $aCucúrbita Máxima
650 $aCucúrbita Pepo
650 $aCucurbitaceae
650 $aHortaliça Cucurbitácea
650 $aSalinidade
650 $aSemente
653 $aEstresse salino
700 1 $aMATIAS, J. R.
700 1 $aLOPES. A. P.
700 1 $aARAGÃO, C. A.
773 $tBioscience Journal, Uberlândia$gv. 35, n. 3, p. 763-774, 2019.
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Embrapa Semiárido (CPATSA) |
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