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. Excess of salts 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 cha...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universidade Federal de Uberlândia
2019-04-01
|
| Series: | Bioscience Journal |
| Subjects: | |
| Online Access: | http://www.seer.ufu.br/index.php/biosciencejournal/article/view/41887 |
| _version_ | 1819142205450747904 |
|---|---|
| author | Barbara França Dantas Janete Rodrigues Matias Carlos Alberto Aragão Armando Pereira Lopes |
| author_facet | Barbara França Dantas Janete Rodrigues Matias Carlos Alberto Aragão Armando Pereira Lopes |
| author_sort | Barbara França Dantas |
| collection | DOAJ |
| description | Salinity is one of the most limiting environmental factors for plant growth in semi-arid regions. Excess of salts 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. |
| first_indexed | 2024-12-22T12:06:39Z |
| format | Article |
| id | doaj.art-9c92238bb5db4656aa0175d3441286f1 |
| institution | Directory Open Access Journal |
| issn | 1981-3163 |
| language | English |
| last_indexed | 2024-12-22T12:06:39Z |
| publishDate | 2019-04-01 |
| publisher | Universidade Federal de Uberlândia |
| record_format | Article |
| series | Bioscience Journal |
| spelling | doaj.art-9c92238bb5db4656aa0175d3441286f12022-12-21T18:26:25ZengUniversidade Federal de UberlândiaBioscience Journal1981-31632019-04-0135310.14393/BJ-v35n3a2019-4188741887Physiological changes in seeds and seedlings of pumpkins submitted to salt stressBarbara França DantasJanete Rodrigues MatiasCarlos Alberto AragãoArmando Pereira LopesSalinity is one of the most limiting environmental factors for plant growth in semi-arid regions. Excess of salts 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.http://www.seer.ufu.br/index.php/biosciencejournal/article/view/41887vigour. seedlings. electrical conductivity. cucurbita pepo. cucurbita maxima. |
| spellingShingle | Barbara França Dantas Janete Rodrigues Matias Carlos Alberto Aragão Armando Pereira Lopes Physiological changes in seeds and seedlings of pumpkins submitted to salt stress Bioscience Journal vigour. seedlings. electrical conductivity. cucurbita pepo. cucurbita maxima. |
| title | 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_short | 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 |
| topic | vigour. seedlings. electrical conductivity. cucurbita pepo. cucurbita maxima. |
| url | http://www.seer.ufu.br/index.php/biosciencejournal/article/view/41887 |
| work_keys_str_mv | AT barbarafrancadantas physiologicalchangesinseedsandseedlingsofpumpkinssubmittedtosaltstress AT janeterodriguesmatias physiologicalchangesinseedsandseedlingsofpumpkinssubmittedtosaltstress AT carlosalbertoaragao physiologicalchangesinseedsandseedlingsofpumpkinssubmittedtosaltstress AT armandopereiralopes physiologicalchangesinseedsandseedlingsofpumpkinssubmittedtosaltstress |