Seeds Germination of Poaceae Family Species in Saline Water

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Year:
2021
Type of Publication:
Article
Keywords:
Saline Strees, NaCl, Germination Speed Index, Mean Germination Time
Authors:
Pagliarini, Maximiliano Kawahata; Pontim, Bruno Cezar Alvaro; Gordin, Carla Regina Baptista; de Almeida Monaco-Mello, Kamila; dos Santos Zomerfeld, Patricia; Nogueira, Jose Carlos; de Souza, Luiz Carlos Ferreira
Journal:
IJRAS
Volume:
8
Number:
5
Pages:
201-212
Month:
September
ISSN:
2348-3997
Abstract:
Salt stress may cause serious problems in the plant, such as reduced photosynthesis, cell death and mainly interfere with seed germination. Thus, the aim of the work was to evaluate the influence of saline water in the germination of seven species of Poaceae family. The experiment was developed at the Laboratory of Research, Teaching and Extension Support at Experimental Farm of Agrarian Sciences of Grand Dourados Federal University (UFGD) using seeds of barley, oat, rice, rye, ryegrass, triticale and wheat. The experimental design used was completely randomized with four treatments and four replications. The treatments were formed by doses of NaCl dissolved in water: T1 – 0.0 g L-1 (control – 0.065 mS); T2 – 3.0 g L-1 (5.50 mS); T3 – 6.0 g L-1 (10.70 mS) and T4 – 9.0 g L-1 (15.10 mS). In all cases, the substrates were moistened with treatments 2.5 times their masses. All germination tests were performed in B.O.D. with constant light. The temperature and the duration of test changed according to the species. It was analysed: first count, percentage of germination, germination speed index, mean germination time, mean germination speed, seedling length and synchronization index. Data were submitted to analysis of variance and in the case of significance at 5% of probability means were compared by Tukey test by Sisvar computer program. The use of water with the maximum concentration of sodium chloride (NaCl – 9.0 g L-1) did not affect the final percentage of germination of barley, oats, rice, triticale and wheat. However, for rye and ryegrass, the maximum dose of NaCl, that did not interfere with the final germination percentage was 6 g L-1. Barley may be considered the most tolerant to salinity. Even under conditions of higher saline concentrations, the species showed uniform seed germination. The other species may be considered moderately tolerant to salinity, according to research data. Salinity affected the initial development of all species, decreasing seedling length in the first NaCl dosage (3 g L-1) in the irrigation water.

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