Crops ›› 2017, Vol. 33 ›› Issue (6): 165-169.doi: 10.16035/j.issn.1001-7283.2017.06.027

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Germination Responses of Elymus sibiricus Seed to Temperature and Moisture

Wang Chuanqi1,Xu Yamei1,Liang Sha1,Shen Zhenxi2,Yu Chengqun2,Zhang Shangxiong3,Zhang Weihong4,Wang Xiaochuan1,Miao Yanjun1   

  1. 1Xizang Agriculture and Animal Husbandry College,Linzhi 860000,Tibet,China
    2Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China
    3China Agricultural University,Beijing 100193,China
    4College of Animal Science and Technology,Yangzhou University,Yangzhou 225009,Jiangsu,China
  • Received:2017-08-11 Revised:2017-10-17 Online:2017-12-15 Published:2018-08-26
  • Contact: Yanjun Miao

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Abstract:

Tibet wild Elymus sibiricus seeds were used as the material, and the water and temperature environment of Elymus sibiricus seed germination was simulated by the interaction of different temperatures (10, 15, 20, 25℃) and different concentrations (0, 5%, 10%, 15%, 20%, 25%) of PEG-6000 to study the seed germination characteristics of wild Elymus sibiricus under different hydrothermal conditions. The results showed that different water and temperature conditions had a significant effect on the germination of Elymus sibiricus (P<0.01); The germination rate, germination potential, germination index and vigor index of Elymus sibiricus were increased with the increase of temperature, with the best response under 25℃; When PEG concentration was 5%, the seed germination rate was higher under 15℃ and 20℃than that under control. When PEG-6000 concentration was 15%, seed germination rate, germination potential, germination index and vigor index were significantly inhibited (P<0.05) and the higher the temperature, the more significant the inhibitory effect. The best germination rate of the wild Elymus sibiricus seeds was at temperature of 25℃ and the concentration of PEG solution was 0-5%. The response of seed germination to moisture depends on the temperature changes, lower temperature inhibited seed germination.

Key words: Elymus sibiricus, Temperature, PEG-6000, Germination, Tibet

Table 1

Effects of temperature on the seed germination of wild Elymus sibiricus"

温度Temprature (℃) 发芽率Germination rate (%) 发芽势Germination potential (%) 发芽指数Germination index 活力指数Vigor index
10 21.66±1.56dD 19.53±0.89dD 3.55±0.08dD 2.28±0.30dD
15 45.76±3.70cC 27.29±0.79cC 7.70±0.43cC 17.89±0.77cC
20 72.68±2.64bB 42.97±0.62bB 19.32±1.39bB 47.43±0.36bB
25 90.55±1.44aA 62.01±1.95aA 22.02±0.66aA 52.95±0.94aA

Fig.1

Effects of different temperatures on the germination rate of wild Elymus sibiricus seeds"

Fig.2

Effects of different temperatures on bud length and root length of wild Elymus sibiricus seeds"

Fig.3

Effects of different PEG-6000 simulated drought stress on germiantion rate of wild Elymus sibiricus seeds"

Fig.4

Effects of different PEG-6000 simulated drought stress on germination potential of wild Elymus sibiricus seeds"

Fig.5

Effects of different PEG-6000 simulated drought stress on germination index of wild Elymus sibiricus seeds"

Fig.6

Effects of different PEG-6000 simulated drought stress on vigor index of wild Elymus sibiricus seeds"

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