Effects of different temperature and moisture conditions on seed germination of Festuca sinensis

doi:10.11686/cyxb2015301

Abstract

Abstract: The aim of this study was to determine the most suitable moisture and temperature conditions for seed germination of Festuca sinensis. The germination of F. sinensis seeds was evaluated at 15, 20, and 25℃, and under different moisture conditions imposed using various concentrations of polyethylene glycol (PEG). The F. sinensis seeds showed different germination features under different moisture and temperature conditions. The highest germination rate was at 25℃ and the lowest was at 15℃, suggesting that higher temperatures are beneficial for seed germination. At 15 and 20℃, the seed germination rate, germination potential, germination index, and vigor index of seeds were significantly higher in the -0.2 MPa water treatment than in the control and the other treatments (P<0.05). These results indicated that a low PEG concentration can improve F. sinensis seed vigor under low temperatures. However, at 25℃, the germination rate and germination index of seeds were higher in the control than in the PEG treatments (P<0.05) suggesting that PEG inhibited the germination of F. sinensis seeds at higher temperatures. The degree of inhibition increased with increasing PEG concentrations. As the PEG concentration increased, there were decreases in the seed germination rate, germination index, plumule length, radicle length, shoot ratio of seeds, seedling moisture content, and drought resistance. Together, these results show that a low concentration of PEG can promote F. sinensis seed germination whereas high concentrations of PEG can decrease seed vigor.

WANG Jian-Jun, MA An-Wei, WANG Zhi-Gang, CAI Yu, KUANG Yu, TIAN Pei. Effects of different temperature and moisture conditions on seed germination of Festuca sinensis[J]. Acta Prataculturae Sinica, 2016, 25(4): 73-80.

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