Physiological changes in seeds and seedlings of pumpkins submitted to salt stress.
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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Format: | Artigo de periódico biblioteca |
Language: | English eng |
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2019-06-14
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Subjects: | Estresse salino, Abóbora, Semente, Hortaliça Cucurbitácea, Cucurbitaceae, Condutividade Eletrica, Cucúrbita Pepo, Cucúrbita Máxima, Salinidade, Cucurbita, Pumpkins, |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1109869 |
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dig-alice-doc-11098692019-06-15T00:42:25Z Physiological changes in seeds and seedlings of pumpkins submitted to salt stress. DANTAS, B. F. MATIAS, J. R. LOPES. A. P. ARAGÃO, C. A. BARBARA FRANCA DANTAS, CPATSA; JANETE RODRIGUES MATIAS; ARMANDO PEREIRA LOPES; CARLOS ALBERTO ARAGÃO. Estresse salino Abóbora Semente Hortaliça Cucurbitácea Cucurbitaceae Condutividade Eletrica Cucúrbita Pepo Cucúrbita Máxima Salinidade Cucurbita Pumpkins 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 2019-06-15T00:42:18Z 2019-06-15T00:42:18Z 2019-06-14 2019 2019-12-02T11:11:11Z Artigo de periódico Bioscience Journal, Uberlândia, v. 35, n. 3, p. 763-774, 2019. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1109869 10.14393/BJ-v35n3a2019-41887 en eng openAccess |
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Estresse salino Abóbora Semente Hortaliça Cucurbitácea Cucurbitaceae Condutividade Eletrica Cucúrbita Pepo Cucúrbita Máxima Salinidade Cucurbita Pumpkins Estresse salino Abóbora Semente Hortaliça Cucurbitácea Cucurbitaceae Condutividade Eletrica Cucúrbita Pepo Cucúrbita Máxima Salinidade Cucurbita Pumpkins |
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Estresse salino Abóbora Semente Hortaliça Cucurbitácea Cucurbitaceae Condutividade Eletrica Cucúrbita Pepo Cucúrbita Máxima Salinidade Cucurbita Pumpkins Estresse salino Abóbora Semente Hortaliça Cucurbitácea Cucurbitaceae Condutividade Eletrica Cucúrbita Pepo Cucúrbita Máxima Salinidade Cucurbita Pumpkins DANTAS, B. F. MATIAS, J. R. LOPES. A. P. ARAGÃO, C. A. Physiological changes in seeds and seedlings of pumpkins submitted to salt stress. |
description |
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 |
author2 |
BARBARA FRANCA DANTAS, CPATSA; JANETE RODRIGUES MATIAS; ARMANDO PEREIRA LOPES; CARLOS ALBERTO ARAGÃO. |
author_facet |
BARBARA FRANCA DANTAS, CPATSA; JANETE RODRIGUES MATIAS; ARMANDO PEREIRA LOPES; CARLOS ALBERTO ARAGÃO. DANTAS, B. F. MATIAS, J. R. LOPES. A. P. ARAGÃO, C. A. |
format |
Artigo de periódico |
topic_facet |
Estresse salino Abóbora Semente Hortaliça Cucurbitácea Cucurbitaceae Condutividade Eletrica Cucúrbita Pepo Cucúrbita Máxima Salinidade Cucurbita Pumpkins |
author |
DANTAS, B. F. MATIAS, J. R. LOPES. A. P. ARAGÃO, C. A. |
author_sort |
DANTAS, B. F. |
title |
Physiological changes in seeds and seedlings of pumpkins submitted to salt stress. |
title_short |
Physiological changes in seeds and seedlings of pumpkins submitted to salt stress. |
title_full |
Physiological changes in seeds and seedlings of pumpkins submitted to salt stress. |
title_fullStr |
Physiological changes in seeds and seedlings of pumpkins submitted to salt stress. |
title_full_unstemmed |
Physiological changes in seeds and seedlings of pumpkins submitted to salt stress. |
title_sort |
physiological changes in seeds and seedlings of pumpkins submitted to salt stress. |
publishDate |
2019-06-14 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1109869 |
work_keys_str_mv |
AT dantasbf physiologicalchangesinseedsandseedlingsofpumpkinssubmittedtosaltstress AT matiasjr physiologicalchangesinseedsandseedlingsofpumpkinssubmittedtosaltstress AT lopesap physiologicalchangesinseedsandseedlingsofpumpkinssubmittedtosaltstress AT aragaoca physiologicalchangesinseedsandseedlingsofpumpkinssubmittedtosaltstress |
_version_ |
1756025998718009344 |