Abstract
ABSTRACT The aim of this study was to evaluate seed physiological quality and initial pea (Pisum sativum) seedling development at different water and salt potentials. Polyethylene glycol 6000, sodium chloride and potassium chloride solutions with different osmotic potentials (0; -0.2; -0.4; -0.6; -0.8; -1.0, and -1.2 MPa) were used, and the experiment had a 3 × 7 factorial arrangement. The physiological quality and initial seedling growth characteristics (first germination count, final germination count, strong normal seedlings, epicotyl and taproot lengths, epicotyl dry matter, and root dry matter) were evaluated in a completely randomized experimental design, with four repetitions. Decreases in the observed variables showed that the simulated stress conditions negatively affected physiological performance, germination and initial seedling growth. The water and salt stresses induced by the sodium chloride and potassium chloride solutions were greater than the stress induced by polyethylene glycol 6000.
Highlights
Water stress has negative effects on the survival and initial growth of plants (Machado et al, 2017)
The water and salt stresses induced by the sodium chloride and potassium chloride solutions were greater than the stress induced by polyethylene glycol 6000
The aim of this study was to evaluate the physiological quality of pea seeds and the initial growth of pea seedlings under different water and salt potentials
Summary
Water stress has negative effects on the survival and initial growth of plants (Machado et al, 2017). The aim is to simulate water and salt stress conditions in the soil (Taiz & Zeiger, 2013). Several chemical compounds, including polyethylene glycol (PEG) and sodium chloride (NaCl), have been used to simulate water and salt stress conditions (Pereira et al, 2012). High salt concentrations and water deficiency may prevent water uptake and inhibit seed germination due to a reduction in the external osmotic potential or the toxic effects caused by the uptake of ions, such as Na+ and Cl– (Silva et al, 2016). The aim of this study was to evaluate the physiological quality of pea seeds and the initial growth of pea seedlings under different water and salt potentials
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