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Acta Prataculturae Sinica ›› 2009, Vol. 18 ›› Issue (6): 164-168.

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Effects on cold tolerance of M2 of Longmu No. 803 alfalfa seed pre-treatedwith a mixed high-energy particle field

SHANG Chen1, HAN Gui-qing2, CHEN Ji-shan2, LIU Jie-lin2, ZHANG Yue-xue2,
TANG Feng-lan2, HAN Wei-bo2, HAO Ruo-chao2, LIU Feng-qi2   

  1. 1.Harbin Normal University, Harbin 150086, China;
    2.Institute of Pratacultural Science,
    Heilongjiang Academy of Agricultural Science, Harbin 150086, China
  • Received:2009-01-12 Online:2009-12-20 Published:2009-12-20

Abstract: The seeds of Longmu No. 803 alfalfa were pre-treated in a mixed high-energy particle field. The effect of M2 on Longmu No. 803 alfalfa subjected to low temperature treatment between autumn and winter were studied, including monitoring the leaf for free proline content, SOD activity, LSSC, Chla and Chlb contents after treatment with different radiant dosages. The mixed high-energy particle field significantly (P<0.05) increased the cold tolerance of M2 compared with the control. With increasing radiant dosage, the proline content, SOD activity, LSSC, Chla and Chlb contents of M2 were all significantly reduced. The low radiant dosage induced stronger cold tolerance than the high radiant dosage. There were two options involving 145 or 195 Gy of mixed high-energy particle field intensity.

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