Germinação De Sementes E Vigor De Plântulas De Brócolos Submetida Ao Estresse Salino Com Nacl

Lopes, José Carlos B.; Maciel, Khétrin Silva; Mauri, Janaína

doi:10.3738/1982.2278.789

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…When the osmotic potential of the solution is lower to the cells of the embryo occurs at reduced speed germination and/or seedling growth (Carvalho and Nakagawa, 2000). This occurrence has been reported for seeds of several species, such as Senna occidentalis (Delachiave and Pinho, 2003) Chorisia speciosa (Fanti and Perez, 2003), Mimosa tenuiflora (Bakke et al, 2006), Daucus carota (Lopes and Dias, 2004) and Ruta graveolens (Yamashita et al, 2009).…”

Section: Molar Concentration and Phmentioning

confidence: 53%

Allelopathic effect of anacardium humile mart. In the germination and growth of Lactuca Sativa l. and Raphanus Sativus l.

Periotto,

Juliano Gualtieri,

Lima

2012

Rev. Eletr. Cient. Inov. Tecnol.

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In this research it was evaluated the allelopathic potential of aqueous extracts from Anacardium humile stems and leaves in seed germination and seedling growth of radish and lettuce. In the germination tests the aqueous extracts were used at 0, 4, 8, 12 and 16% (w/v) concentration. Four replicates of thirty seeds of lettuce and radish were distributed in Petri dishes covered with filter paper moistened with 5 mL different extracts, kept at 27 oC and light absence. The counting of germinated seeds was performed daily, being calculated speed and the percentage of germination. In tests measuring the germination percentage, only radish`s seeds were affected by the aqueous extracts of leaves 8%. The speed’s germination in lettuce seeds was significantly reduced using leaves extract at all concentrations. Leaf extracts 8, 12, 16% and stems extracts 8% also caused significant reductions in the speed germination of radish seeds. Growth experiments were carried out with four replicates of eight germinated seeds of lettuce and radish, at 27 oC, ten days after the germination and having filter paper as substratum, moistened with 0%, 4% and 12% of aqueous extracts. Both, lettuce and radish, presented a significant inhibition of total length when stem extracts were used. Leaves’s extracts 4% and 12% also produced significant growth inhibition in radish seedlings. The extracts interference on seed germination and seedling growth of lettuce and radish was disassociated of pH and osmotic potential influence, indicating an allelopathic potential of the species studied.

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Section: Molar Concentration and Phmentioning

confidence: 53%

Allelopathic effect of anacardium humile mart. In the germination and growth of Lactuca Sativa l. and Raphanus Sativus l.

Periotto,

Juliano Gualtieri,

Lima

2012

Rev. Eletr. Cient. Inov. Tecnol.

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“…This reduction may affect the kinetics of water absorption by the seeds (osmotic effect), and may also increase the concentration of ions in the embryo (toxic effect) to toxic levels (MARCOS FILHO, 2015). According to Maciel et al (2012) the metabolic events that culminate in germination can be affected by the suppression of mobilized reserves, which can be attributed to the role of salt in the "de novo" synthesis and in active tissues of enzymes responsible for the hydrolysis and transfer of hydrolysates from reserves to the embryo. Contribuciones a Las Ciencias Sociales, São José dos Pinhais, v.16, n.1, p. 124-143, 2023 jan. 2021 The results observed in the highest saline concentrations caused a decrease in the percentage of germination, a fact also observed by Azevedo et al (2003) and Nobrega et al…”

Section: Resultsmentioning

confidence: 99%

Hybrid and native sesame seeds subjected to salinity

Melo¹,

Berto²,

Melo³

et al. 2023

CLCS

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Sesame is a plant with great economic and social potential, being used for various purposes such as the food, pharmaceutical, medicinal industries, and more recently, as a source of renewable energy for the production of biofuel. One of the factors that most limit the productivity of this crop is salt stress. Based on this, the present work aimed to evaluate the germination and vigor of hybrid and creoles sesame seeds subjected to saline stress. The experiment was carried out at the Phytotechnics Laboratory of the Engineering and Agricultural Sciences Campus/UFAL. Two sesame cultivars were studied, BRS Anahí and Creole from the state of Sergipe. The seeds were aseptically treated by immersion in 70% alcohol for 1 minute, followed by washing in running water before being subjected to the treatments. To simulate salt stress, sodium chloride (NaCl) was used as a solute at concentrations of 0.0 (control); -0.1; -0.2; -0.3; -0.4 and -0.5 MPa. The material was placed, Biochemical Oxygen Demand (B.O.D.) germination type chamber, regulated at an alternate temperature of 20-30 °C. The experimental design used was completely randomized, with four replications of 25 seeds per treatments in a 2 x 6 factorial scheme (sesame cultivars x saline concentrations). Data were submitted to analysis of variance and polynomial regression, and the analyzes were performed using the SISVAR 5.6 software. The parameters evaluated were: water content, germination, first germination count, germination speed index, seedling length and dry mass. The results for the germination of sesame seeds submitted to salt stress showed that as the salinity levels increased there was a reduction in the percentage of germination of the sesame seeds studied, but until the concentration of -0.4 MPa they are within the standards allowed for commercialization of that culture. In the first count of germination, the Creoles sesame seeds showed the highest values, demonstrating better germination performance compared to BRS Anahí. In the germination speed index, BRS Anahí outperformed Creoles in all salt concentrations, except for the control. For seedling length, it was found that at the lowest salt concentrations both sesame varieties obtained the highest averages, with a significant reduction in length at the highest concentration (-0.5). The dry mass of the seedlings decreased as the water salinity increased, being more evident after the -0.3 MPa NaCl solution, especially for BRS Anahí. Thus, it can be concluded that salinity affects the physiological potential of sesame seeds, being more evident when at salt concentrations from -0.3 MPa. Creoles sesame seeds are less sensitive to saline stress.

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