Crops ›› 2021, Vol. 37 ›› Issue (4): 202-205.doi: 10.16035/j.issn.1001-7283.2021.04.031

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Effects of 60Co-γ Radiation on the Seed Germination and Seedling Growth of Broomcorn Millet

Yan Feng(), Li Qingquan(), Dong Yang, Ji Shengdong, Han Yehui, Yu Yunkai, Wang Lida, Zhao Suo   

  1. Qiqihar Sub-Academy of Heilongjiang Academy of Agricultural Sciences, Qiqihar 161006, Heilongjiang, China
  • Received:2020-07-29 Revised:2020-08-12 Online:2021-08-15 Published:2021-08-13
  • Contact: Li Qingquan E-mail:yanfeng6338817@126.com;zls1968@163.com

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Abstract:

To investigate the effects of different 60Co-γ radiation dosages for broomcorn millet on the seed germination, growth and physiological characteristics of seedlings, the seeds of Qishu No.2 were used as the test material and treated with different60Co-γ radiation dosages of 0, 150, 200, 250, 300, and 350Gy, the changes in growth and physiological indexes of leaves were measured. The results showed that60Co-γ radiation had a strong impact on emergence rate, seedling height, leaf length, and fresh weight per plant. High radiation dosages (300 and 350Gy) could cause serious damage to the seeds and had a strong impact on seed germination and seedlings growth. Low radiation dosage (150Gy) could improve the germination of broomcorn millet as well as soluble sugar, proline, soluble protein, and malondialdehyde content in broomcorn millet. Median lethal dosage of broomcorn millet was 287Gy according to the median lethal formula.

Key words: Broomcorn millet, Seed germination, Seedling growth, 60Co-γ radiation

"

辐射剂量
Radiation
dosage (Gy)		 发芽率
Germination
rate		 出苗率
Emergence
rate		 成苗率
Survived
rate
0 (CK) 94b 93.8b 100.0a
150 97a 97.2a 89.2b
200 93b 91.9b 85.7c
250 90c 82.6c 66.6d
300 86d 73.3d 45.4e
350 85d 60.1e 18.5f

Table 2

Effects of different radiation dosages on the growth of broomcorn millet seedling"

辐射剂量
Radiation
dosage (Gy)		 株高
Plant height
(cm)		 叶长
Leaf length
(cm)		 苗鲜重
Fresh weight
per plant (g)
0 (CK) 25.6a 20.1a 18.5a
150 24.4a 20.0a 18.1a
200 21.8b 18.3b 16.7b
250 18.9c 16.7c 15.2c
300 16.7d 16.8c 14.9c
350 16.5d 16.4c 11.6d

Table 3

Effects of different radiation dosages on the physiological indexes of seedling leaves of broomcorn millet"

辐射剂量
Radiation dosage (Gy)		 可溶性糖含量
Soluble sugar content (mmol/L)		 脯氨酸含量
Proline content (μg/g)		 可溶性蛋白含量
Soluble protein content (mg/g)		 丙二醛含量
MDA content (μmol/L)
0 (CK) 2.15c 37.91c 0.73d 4.62d
150 2.31c 58.35a 0.95c 4.94d
200 2.34c 50.74b 1.26a 5.80c
250 3.41b 38.97c 1.11b 6.41b
300 4.51a 29.46d 0.99c 7.78a
350 2.58c 20.20e 0.71d 7.83a
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