ESTRESSE SALINO E TÉRMICO EM SEMENTES DE SOJA SUBMETIDAS AO CONDICIONAMENTO OSMÓTICO COM POLIETILENO GLICOL
ESTRESSE SALINO E TÉRMICO EM SEMENTES DE SOJA SUBMETIDAS AO CONDICIONAMENTO OSMÓTICO COM POLIETILENO GLICOL
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DOI: https://doi.org/10.22533/at.ed.8962403103
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Palavras-chave: Glycine max L., Osmocondicionamento, Sustentabilidade, Temperatura.
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Keywords: Glycine max L., Osmoconditioning, Sustainability, Temperature.
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Abstract: Soybean seed quality is essential to the crop sustainability and to obtain high productivity. Physiological conditioning is a technique that improves seed performance under adverse conditions, such as saline and thermal stress. The objective of this study was to evaluate the physiological performance of soybean seeds belonging to different cultivars subjected to osmotic conditioning with polyethylene glycol (PEG 6000) and exposed to saline stress with NaCl and thermal stress. The experiment was conducted with seed lots belonging to the cultivars BMX Potência RR, M 6210 IPRO and M 6410 IPRO. The seeds were subjected to osmotic conditioning with PEG 6000 (-1.0 MPa and -1.2 MPa) for 12 hours. The effect of osmotic conditioning was evaluated on the germination and vigor of soybean seeds and on the germination of seeds subjected to saline stress with NaCl (-0.3 MPa and -0.6 MPa) and thermal stress (15 ºC and 35 ºC). Seeds not subjected to saline solution (0 MPa) and seeds placed at a temperature of 25 ºC, respectively, were used as controls. The results, when significant, were compared by Tukey's test at 5% significance for each cultivar. Osmotic conditioning with PEG influences the electrical conductivity of soybean seeds of cv. BMX Potência RR, M 6210 IPRO and M 6410 IPRO. Osmotic conditioning with PEG (-1.0 MPa) has a positive effect on the germination of seeds cv. BMX Potência RR and M 6210 IPRO subjected to saline stress with NaCl (-0.6 MPa). However, osmotic conditioning does not influence the germination of soybean seeds subjected to sub and supra-optimal temperatures.
- Tathiana Elisa Masetto
- Gislaine da Silva Pereira
- Leilaine Gomes da Rocha
- Rafaela Martins de Araújo
- Daynara da Silva Martins