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不同钙盐对温州蜜柑抗冻性的影响

李新国1,2;曾斌1;杨晓红1;何利刚1;王会良1;孙中海1,3   

  1. 1华中农业大学国家柑橘育种中心, 武汉 430070;2海南大学园艺园林学院, 海南儋州 571737;3湖北省农业科学院果树茶叶研究所, 武汉 430209
  • 收稿日期:2007-12-16 修回日期:1900-01-01 出版日期:2008-08-20 发布日期:2008-08-20

Effects of different calcium salts on freezing resistance of satsuma mandarin.

LI Xin-guo1,2;ZENG Bin1;YANG Xiao-hong1;HE Li-gang1;WANG Hui-liang1;SUN Zhong-hai1,3   

  1. 1National Center for Citrus Breeding, Huazhong Agricultural Universit
    y, Wuhan 430070, China;2College of Horticulture and Landscape Architect
    ure, Hainan University, Danzhou 571737, Hainan, China;3Institute of Fruit
    and Tea, Hubei Academy of Agricultural Sciences, Wuhan 430209, China
  • Received:2007-12-16 Revised:1900-01-01 Online:2008-08-20 Published:2008-08-20

摘要: 用20 mmol·L-1氯化钙(CaCl2)、醋酸钙(CaAc2)和硝酸钙(Ca(NO3)2)喷施“国庆1号”温州蜜柑叶片,研究3种钙盐对其叶片抗冻性的影响.结果表明:喷施钙盐降低了叶片半致死温度(LT50),提高了温州蜜柑的抗冻性,CaCl2处理的LT50比对照降低了0.54 ℃,而CaAc2和Ca(NO3)2处理分别比对照降低了1.34 ℃和1.35 ℃,表明CaCl2处理效果较差,CaAc2和Ca(NO3)2处理效果较好.钙盐处理还提高了“国庆1号”温州蜜柑叶片在低温(-9 ℃)胁迫下的SOD、POD活性及可溶性蛋白质、可溶性糖和脯氨酸含量,减少了叶片MDA的积累.

关键词: 再力花残体, 结晶紫, 吸附等温线, 动力学, 热力学

Abstract: The study on the effects of foliar spraying 20 mmol·L-1 of CaCl2, Ca(NO3)2 and CaAc2 on the freezing resistance of satsuma mandarin (Citrus unshiu Marc. cv. Guoqing No.1) showed that after treated with these Ca salts, the leaves of test plant had a lower half lethal temperature (LT50) than the control (sprayed with distilled water). The LT50 after treated with CaCl2 was 0.54 ℃ lower, whereas that after treated with CaAc2 and Ca(NO3)2 was 1.34 ℃ and 1.35 ℃ lower, respectively, implying that the latter two Ca salts were more effective in enhancing the freezing resistance of satsuma mandarin. Moreover, foliar spraying Ca salts increased the superoxidase (SOD) and peroxidase (POD) activities and the contents of soluble proteins, soluble sugars and praline in leaves, and decreased the leaf MDA content.

Key words: Thalia dealbata residue, crystal violet, adsorption isothermal, kinetics, thermodynamics.